Lesson 20 (#140)
* Adding content * Update en.json * Update README.md * Update TRANSLATIONS.md * Adding lesson tempolates * Fixing code files with each others code in * Update README.md * Adding lesson 16 * Adding virtual camera * Adding Wio Terminal camera capture * Adding wio terminal code * Adding SBC classification to lesson 16 * Adding challenge, review and assignment * Adding images and using new Azure icons * Update README.md * Update iot-reference-architecture.png * Adding structure for JulyOT links * Removing icons * Sketchnotes! * Create lesson-1.png * Starting on lesson 18 * Updated sketch * Adding virtual distance sensor * Adding Wio Terminal image classification * Update README.md * Adding structure for project 6 and wio terminal distance sensor * Adding some of the smart timer stuff * Updating sketchnotes * Adding virtual device speech to text * Adding chapter 21 * Language tweaks * Lesson 22 stuff * Update en.json * Bumping seeed libraries * Adding functions lab to lesson 22 * Almost done with LUIS * Update README.md * Reverting sunlight sensor change Fixes #88 * Structure * Adding speech to text lab for Pi * Adding virtual device text to speech lab * Finishing lesson 23 * Clarifying privacy Fixes #99 * Update README.md * Update hardware.md * Update README.md * Fixing some code samples that were wrong * Adding more on translation * Adding more on translator * Update README.md * Update README.md * Adding public access to the container * First part of retail object detection * More on stock lesson * Tweaks to maps lesson * Update README.md * Update pi-sensor.md * IoT Edge install stuffs * Notes on consumer groups and not running the event monitor at the same time * Assignment for object detector * Memory notes for speech to text * Migrating LUIS to an HTTP trigger * Adding Wio Terminal speech to text * Changing smart timer to functions from hub * Changing a param to body to avoid URL encoding * Update README.md * Tweaks before IoT Show * Adding sketchnote links * Adding object detection labs * Adding more on object detection * More on stock detection * Finishing stock countingpull/178/head
Jim Bennett
3 years ago
committed by
GitHub
parent
1764663458
commit
29b5f293f4
@ -1,9 +1,11 @@
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#
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# Use your object detector on the edge
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## Instructions
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In the last project, you deployed your image classifier to the edge. Do the same with your object detector, exporting it as a compact model and running it on the edge, accessing the edge version from your IoT device.
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## Rubric
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| Criteria | Exemplary | Adequate | Needs Improvement |
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| -------- | --------- | -------- | ----------------- |
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| | | | |
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| Deploy your object detector to the edge | Was able to use the correct compact domain, export the object detector and run it on the edge | Was able to use the correct compact domain, and export the object detector, but was unable to run it on the edge | Was unable to use the correct compact domain, export the object detector, and run it on the edge |
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@ -0,0 +1,92 @@
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import io
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import time
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from picamera import PiCamera
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from azure.cognitiveservices.vision.customvision.prediction import CustomVisionPredictionClient
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from msrest.authentication import ApiKeyCredentials
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from PIL import Image, ImageDraw, ImageColor
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from shapely.geometry import Polygon
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camera = PiCamera()
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camera.resolution = (640, 480)
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camera.rotation = 0
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time.sleep(2)
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image = io.BytesIO()
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camera.capture(image, 'jpeg')
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image.seek(0)
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with open('image.jpg', 'wb') as image_file:
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image_file.write(image.read())
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prediction_url = '<prediction_url>'
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prediction_key = '<prediction key>'
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parts = prediction_url.split('/')
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endpoint = 'https://' + parts[2]
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project_id = parts[6]
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iteration_name = parts[9]
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prediction_credentials = ApiKeyCredentials(in_headers={"Prediction-key": prediction_key})
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predictor = CustomVisionPredictionClient(endpoint, prediction_credentials)
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image.seek(0)
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results = predictor.detect_image(project_id, iteration_name, image)
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threshold = 0.3
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predictions = list(prediction for prediction in results.predictions if prediction.probability > threshold)
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for prediction in predictions:
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print(f'{prediction.tag_name}:\t{prediction.probability * 100:.2f}%')
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overlap_threshold = 0.002
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def create_polygon(prediction):
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scale_left = prediction.bounding_box.left
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scale_top = prediction.bounding_box.top
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scale_right = prediction.bounding_box.left + prediction.bounding_box.width
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scale_bottom = prediction.bounding_box.top + prediction.bounding_box.height
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return Polygon([(scale_left, scale_top), (scale_right, scale_top), (scale_right, scale_bottom), (scale_left, scale_bottom)])
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to_delete = []
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for i in range(0, len(predictions)):
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polygon_1 = create_polygon(predictions[i])
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for j in range(i+1, len(predictions)):
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polygon_2 = create_polygon(predictions[j])
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overlap = polygon_1.intersection(polygon_2).area
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smallest_area = min(polygon_1.area, polygon_2.area)
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if overlap > (overlap_threshold * smallest_area):
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to_delete.append(predictions[i])
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break
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for d in to_delete:
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predictions.remove(d)
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print(f'Counted {len(predictions)} stock items')
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with Image.open('image.jpg') as im:
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draw = ImageDraw.Draw(im)
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for prediction in predictions:
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scale_left = prediction.bounding_box.left
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scale_top = prediction.bounding_box.top
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scale_right = prediction.bounding_box.left + prediction.bounding_box.width
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scale_bottom = prediction.bounding_box.top + prediction.bounding_box.height
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left = scale_left * im.width
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top = scale_top * im.height
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right = scale_right * im.width
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bottom = scale_bottom * im.height
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draw.rectangle([left, top, right, bottom], outline=ImageColor.getrgb('red'), width=2)
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im.save('image.jpg')
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from counterfit_connection import CounterFitConnection
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CounterFitConnection.init('127.0.0.1', 5000)
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import io
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from counterfit_shims_picamera import PiCamera
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from azure.cognitiveservices.vision.customvision.prediction import CustomVisionPredictionClient
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from msrest.authentication import ApiKeyCredentials
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from PIL import Image, ImageDraw, ImageColor
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from shapely.geometry import Polygon
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camera = PiCamera()
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camera.resolution = (640, 480)
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camera.rotation = 0
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image = io.BytesIO()
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camera.capture(image, 'jpeg')
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image.seek(0)
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with open('image.jpg', 'wb') as image_file:
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image_file.write(image.read())
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prediction_url = '<prediction_url>'
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prediction_key = '<prediction key>'
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parts = prediction_url.split('/')
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endpoint = 'https://' + parts[2]
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project_id = parts[6]
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iteration_name = parts[9]
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prediction_credentials = ApiKeyCredentials(in_headers={"Prediction-key": prediction_key})
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predictor = CustomVisionPredictionClient(endpoint, prediction_credentials)
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image.seek(0)
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results = predictor.detect_image(project_id, iteration_name, image)
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threshold = 0.3
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predictions = list(prediction for prediction in results.predictions if prediction.probability > threshold)
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for prediction in predictions:
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print(f'{prediction.tag_name}:\t{prediction.probability * 100:.2f}%')
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overlap_threshold = 0.002
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def create_polygon(prediction):
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scale_left = prediction.bounding_box.left
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scale_top = prediction.bounding_box.top
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scale_right = prediction.bounding_box.left + prediction.bounding_box.width
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scale_bottom = prediction.bounding_box.top + prediction.bounding_box.height
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return Polygon([(scale_left, scale_top), (scale_right, scale_top), (scale_right, scale_bottom), (scale_left, scale_bottom)])
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to_delete = []
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for i in range(0, len(predictions)):
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polygon_1 = create_polygon(predictions[i])
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for j in range(i+1, len(predictions)):
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polygon_2 = create_polygon(predictions[j])
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overlap = polygon_1.intersection(polygon_2).area
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smallest_area = min(polygon_1.area, polygon_2.area)
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if overlap > (overlap_threshold * smallest_area):
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to_delete.append(predictions[i])
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break
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for d in to_delete:
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predictions.remove(d)
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print(f'Counted {len(predictions)} stock items')
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with Image.open('image.jpg') as im:
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draw = ImageDraw.Draw(im)
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for prediction in predictions:
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scale_left = prediction.bounding_box.left
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scale_top = prediction.bounding_box.top
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scale_right = prediction.bounding_box.left + prediction.bounding_box.width
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scale_bottom = prediction.bounding_box.top + prediction.bounding_box.height
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left = scale_left * im.width
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top = scale_top * im.height
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right = scale_right * im.width
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bottom = scale_bottom * im.height
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draw.rectangle([left, top, right, bottom], outline=ImageColor.getrgb('red'), width=2)
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im.save('image.jpg')
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.pio
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.vscode/.browse.c_cpp.db*
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.vscode/c_cpp_properties.json
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.vscode/launch.json
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.vscode/ipch
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{
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// See http://go.microsoft.com/fwlink/?LinkId=827846
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// for the documentation about the extensions.json format
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"recommendations": [
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"platformio.platformio-ide"
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]
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}
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@ -0,0 +1,39 @@
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This directory is intended for project header files.
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A header file is a file containing C declarations and macro definitions
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to be shared between several project source files. You request the use of a
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header file in your project source file (C, C++, etc) located in `src` folder
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by including it, with the C preprocessing directive `#include'.
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```src/main.c
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#include "header.h"
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int main (void)
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{
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...
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}
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```
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Including a header file produces the same results as copying the header file
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into each source file that needs it. Such copying would be time-consuming
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and error-prone. With a header file, the related declarations appear
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in only one place. If they need to be changed, they can be changed in one
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place, and programs that include the header file will automatically use the
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new version when next recompiled. The header file eliminates the labor of
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finding and changing all the copies as well as the risk that a failure to
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find one copy will result in inconsistencies within a program.
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In C, the usual convention is to give header files names that end with `.h'.
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It is most portable to use only letters, digits, dashes, and underscores in
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header file names, and at most one dot.
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Read more about using header files in official GCC documentation:
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* Include Syntax
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* Include Operation
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* Once-Only Headers
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* Computed Includes
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https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html
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@ -0,0 +1,46 @@
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This directory is intended for project specific (private) libraries.
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PlatformIO will compile them to static libraries and link into executable file.
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The source code of each library should be placed in a an own separate directory
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("lib/your_library_name/[here are source files]").
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For example, see a structure of the following two libraries `Foo` and `Bar`:
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|--lib
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| |
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| |--Bar
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| | |--docs
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| | |--examples
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| | |--src
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| | |- Bar.c
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| | |- Bar.h
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| | |- library.json (optional, custom build options, etc) https://docs.platformio.org/page/librarymanager/config.html
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| |
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| |--Foo
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| | |- Foo.c
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| | |- Foo.h
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| |
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| |- README --> THIS FILE
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|
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|- platformio.ini
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|--src
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|- main.c
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and a contents of `src/main.c`:
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```
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#include <Foo.h>
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#include <Bar.h>
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int main (void)
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{
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...
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}
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```
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PlatformIO Library Dependency Finder will find automatically dependent
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libraries scanning project source files.
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More information about PlatformIO Library Dependency Finder
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- https://docs.platformio.org/page/librarymanager/ldf.html
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@ -0,0 +1,26 @@
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; PlatformIO Project Configuration File
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;
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; Build options: build flags, source filter
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; Upload options: custom upload port, speed and extra flags
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; Library options: dependencies, extra library storages
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; Advanced options: extra scripting
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;
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; Please visit documentation for the other options and examples
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; https://docs.platformio.org/page/projectconf.html
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[env:seeed_wio_terminal]
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platform = atmelsam
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board = seeed_wio_terminal
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framework = arduino
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lib_deps =
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seeed-studio/Seeed Arduino rpcWiFi @ 1.0.5
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seeed-studio/Seeed Arduino FS @ 2.0.3
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seeed-studio/Seeed Arduino SFUD @ 2.0.1
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seeed-studio/Seeed Arduino rpcUnified @ 2.1.3
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seeed-studio/Seeed_Arduino_mbedtls @ 3.0.1
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seeed-studio/Seeed Arduino RTC @ 2.0.0
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bblanchon/ArduinoJson @ 6.17.3
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build_flags =
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-w
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-DARDUCAM_SHIELD_V2
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-DOV2640_CAM
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@ -0,0 +1,160 @@
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#pragma once
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#include <ArduCAM.h>
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#include <Wire.h>
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class Camera
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{
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public:
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Camera(int format, int image_size) : _arducam(OV2640, PIN_SPI_SS)
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{
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_format = format;
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_image_size = image_size;
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}
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bool init()
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{
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// Reset the CPLD
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_arducam.write_reg(0x07, 0x80);
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delay(100);
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_arducam.write_reg(0x07, 0x00);
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delay(100);
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// Check if the ArduCAM SPI bus is OK
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_arducam.write_reg(ARDUCHIP_TEST1, 0x55);
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if (_arducam.read_reg(ARDUCHIP_TEST1) != 0x55)
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{
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return false;
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}
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// Change MCU mode
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_arducam.set_mode(MCU2LCD_MODE);
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uint8_t vid, pid;
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// Check if the camera module type is OV2640
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_arducam.wrSensorReg8_8(0xff, 0x01);
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_arducam.rdSensorReg8_8(OV2640_CHIPID_HIGH, &vid);
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_arducam.rdSensorReg8_8(OV2640_CHIPID_LOW, &pid);
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if ((vid != 0x26) && ((pid != 0x41) || (pid != 0x42)))
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{
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return false;
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}
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_arducam.set_format(_format);
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_arducam.InitCAM();
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_arducam.OV2640_set_JPEG_size(_image_size);
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_arducam.OV2640_set_Light_Mode(Auto);
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_arducam.OV2640_set_Special_effects(Normal);
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delay(1000);
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return true;
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}
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void startCapture()
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{
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_arducam.flush_fifo();
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_arducam.clear_fifo_flag();
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_arducam.start_capture();
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}
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bool captureReady()
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{
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return _arducam.get_bit(ARDUCHIP_TRIG, CAP_DONE_MASK);
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}
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bool readImageToBuffer(byte **buffer, uint32_t &buffer_length)
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{
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if (!captureReady()) return false;
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// Get the image file length
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uint32_t length = _arducam.read_fifo_length();
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buffer_length = length;
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|
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if (length >= MAX_FIFO_SIZE)
|
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{
|
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return false;
|
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}
|
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if (length == 0)
|
||||
{
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return false;
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}
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|
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// create the buffer
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byte *buf = new byte[length];
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uint8_t temp = 0, temp_last = 0;
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int i = 0;
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uint32_t buffer_pos = 0;
|
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bool is_header = false;
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_arducam.CS_LOW();
|
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_arducam.set_fifo_burst();
|
||||
|
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while (length--)
|
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{
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temp_last = temp;
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temp = SPI.transfer(0x00);
|
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//Read JPEG data from FIFO
|
||||
if ((temp == 0xD9) && (temp_last == 0xFF)) //If find the end ,break while,
|
||||
{
|
||||
buf[buffer_pos] = temp;
|
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|
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buffer_pos++;
|
||||
i++;
|
||||
|
||||
_arducam.CS_HIGH();
|
||||
}
|
||||
if (is_header == true)
|
||||
{
|
||||
//Write image data to buffer if not full
|
||||
if (i < 256)
|
||||
{
|
||||
buf[buffer_pos] = temp;
|
||||
buffer_pos++;
|
||||
i++;
|
||||
}
|
||||
else
|
||||
{
|
||||
_arducam.CS_HIGH();
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||||
|
||||
i = 0;
|
||||
buf[buffer_pos] = temp;
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||||
|
||||
buffer_pos++;
|
||||
i++;
|
||||
|
||||
_arducam.CS_LOW();
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||||
_arducam.set_fifo_burst();
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||||
}
|
||||
}
|
||||
else if ((temp == 0xD8) & (temp_last == 0xFF))
|
||||
{
|
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is_header = true;
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||||
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buf[buffer_pos] = temp_last;
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buffer_pos++;
|
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i++;
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buf[buffer_pos] = temp;
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buffer_pos++;
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i++;
|
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}
|
||||
}
|
||||
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_arducam.clear_fifo_flag();
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||||
|
||||
_arducam.set_format(_format);
|
||||
_arducam.InitCAM();
|
||||
_arducam.OV2640_set_JPEG_size(_image_size);
|
||||
|
||||
// return the buffer
|
||||
*buffer = buf;
|
||||
}
|
||||
|
||||
private:
|
||||
ArduCAM _arducam;
|
||||
int _format;
|
||||
int _image_size;
|
||||
};
|
||||
@ -0,0 +1,49 @@
|
||||
#pragma once
|
||||
|
||||
#include <string>
|
||||
|
||||
using namespace std;
|
||||
|
||||
// WiFi credentials
|
||||
const char *SSID = "<SSID>";
|
||||
const char *PASSWORD = "<PASSWORD>";
|
||||
|
||||
const char *PREDICTION_URL = "<PREDICTION_URL>";
|
||||
const char *PREDICTION_KEY = "<PREDICTION_KEY>";
|
||||
|
||||
// Microsoft Azure DigiCert Global Root G2 global certificate
|
||||
const char *CERTIFICATE =
|
||||
"-----BEGIN CERTIFICATE-----\r\n"
|
||||
"MIIF8zCCBNugAwIBAgIQAueRcfuAIek/4tmDg0xQwDANBgkqhkiG9w0BAQwFADBh\r\n"
|
||||
"MQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3\r\n"
|
||||
"d3cuZGlnaWNlcnQuY29tMSAwHgYDVQQDExdEaWdpQ2VydCBHbG9iYWwgUm9vdCBH\r\n"
|
||||
"MjAeFw0yMDA3MjkxMjMwMDBaFw0yNDA2MjcyMzU5NTlaMFkxCzAJBgNVBAYTAlVT\r\n"
|
||||
"MR4wHAYDVQQKExVNaWNyb3NvZnQgQ29ycG9yYXRpb24xKjAoBgNVBAMTIU1pY3Jv\r\n"
|
||||
"c29mdCBBenVyZSBUTFMgSXNzdWluZyBDQSAwNjCCAiIwDQYJKoZIhvcNAQEBBQAD\r\n"
|
||||
"ggIPADCCAgoCggIBALVGARl56bx3KBUSGuPc4H5uoNFkFH4e7pvTCxRi4j/+z+Xb\r\n"
|
||||
"wjEz+5CipDOqjx9/jWjskL5dk7PaQkzItidsAAnDCW1leZBOIi68Lff1bjTeZgMY\r\n"
|
||||
"iwdRd3Y39b/lcGpiuP2d23W95YHkMMT8IlWosYIX0f4kYb62rphyfnAjYb/4Od99\r\n"
|
||||
"ThnhlAxGtfvSbXcBVIKCYfZgqRvV+5lReUnd1aNjRYVzPOoifgSx2fRyy1+pO1Uz\r\n"
|
||||
"aMMNnIOE71bVYW0A1hr19w7kOb0KkJXoALTDDj1ukUEDqQuBfBxReL5mXiu1O7WG\r\n"
|
||||
"0vltg0VZ/SZzctBsdBlx1BkmWYBW261KZgBivrql5ELTKKd8qgtHcLQA5fl6JB0Q\r\n"
|
||||
"gs5XDaWehN86Gps5JW8ArjGtjcWAIP+X8CQaWfaCnuRm6Bk/03PQWhgdi84qwA0s\r\n"
|
||||
"sRfFJwHUPTNSnE8EiGVk2frt0u8PG1pwSQsFuNJfcYIHEv1vOzP7uEOuDydsmCjh\r\n"
|
||||
"lxuoK2n5/2aVR3BMTu+p4+gl8alXoBycyLmj3J/PUgqD8SL5fTCUegGsdia/Sa60\r\n"
|
||||
"N2oV7vQ17wjMN+LXa2rjj/b4ZlZgXVojDmAjDwIRdDUujQu0RVsJqFLMzSIHpp2C\r\n"
|
||||
"Zp7mIoLrySay2YYBu7SiNwL95X6He2kS8eefBBHjzwW/9FxGqry57i71c2cDAgMB\r\n"
|
||||
"AAGjggGtMIIBqTAdBgNVHQ4EFgQU1cFnOsKjnfR3UltZEjgp5lVou6UwHwYDVR0j\r\n"
|
||||
"BBgwFoAUTiJUIBiV5uNu5g/6+rkS7QYXjzkwDgYDVR0PAQH/BAQDAgGGMB0GA1Ud\r\n"
|
||||
"JQQWMBQGCCsGAQUFBwMBBggrBgEFBQcDAjASBgNVHRMBAf8ECDAGAQH/AgEAMHYG\r\n"
|
||||
"CCsGAQUFBwEBBGowaDAkBggrBgEFBQcwAYYYaHR0cDovL29jc3AuZGlnaWNlcnQu\r\n"
|
||||
"Y29tMEAGCCsGAQUFBzAChjRodHRwOi8vY2FjZXJ0cy5kaWdpY2VydC5jb20vRGln\r\n"
|
||||
"aUNlcnRHbG9iYWxSb290RzIuY3J0MHsGA1UdHwR0MHIwN6A1oDOGMWh0dHA6Ly9j\r\n"
|
||||
"cmwzLmRpZ2ljZXJ0LmNvbS9EaWdpQ2VydEdsb2JhbFJvb3RHMi5jcmwwN6A1oDOG\r\n"
|
||||
"MWh0dHA6Ly9jcmw0LmRpZ2ljZXJ0LmNvbS9EaWdpQ2VydEdsb2JhbFJvb3RHMi5j\r\n"
|
||||
"cmwwHQYDVR0gBBYwFDAIBgZngQwBAgEwCAYGZ4EMAQICMBAGCSsGAQQBgjcVAQQD\r\n"
|
||||
"AgEAMA0GCSqGSIb3DQEBDAUAA4IBAQB2oWc93fB8esci/8esixj++N22meiGDjgF\r\n"
|
||||
"+rA2LUK5IOQOgcUSTGKSqF9lYfAxPjrqPjDCUPHCURv+26ad5P/BYtXtbmtxJWu+\r\n"
|
||||
"cS5BhMDPPeG3oPZwXRHBJFAkY4O4AF7RIAAUW6EzDflUoDHKv83zOiPfYGcpHc9s\r\n"
|
||||
"kxAInCedk7QSgXvMARjjOqdakor21DTmNIUotxo8kHv5hwRlGhBJwps6fEVi1Bt0\r\n"
|
||||
"trpM/3wYxlr473WSPUFZPgP1j519kLpWOJ8z09wxay+Br29irPcBYv0GMXlHqThy\r\n"
|
||||
"8y4m/HyTQeI2IMvMrQnwqPpY+rLIXyviI2vLoI+4xKE4Rn38ZZ8m\r\n"
|
||||
"-----END CERTIFICATE-----\r\n";
|
||||
@ -0,0 +1,223 @@
|
||||
#include <Arduino.h>
|
||||
#include <ArduinoJson.h>
|
||||
#include <HTTPClient.h>
|
||||
#include <rpcWiFi.h>
|
||||
#include "SD/Seeed_SD.h"
|
||||
#include <Seeed_FS.h>
|
||||
#include <SPI.h>
|
||||
#include <vector>
|
||||
#include <WiFiClientSecure.h>
|
||||
|
||||
#include "config.h"
|
||||
#include "camera.h"
|
||||
|
||||
Camera camera = Camera(JPEG, OV2640_640x480);
|
||||
|
||||
WiFiClientSecure client;
|
||||
|
||||
void setupCamera()
|
||||
{
|
||||
pinMode(PIN_SPI_SS, OUTPUT);
|
||||
digitalWrite(PIN_SPI_SS, HIGH);
|
||||
|
||||
Wire.begin();
|
||||
SPI.begin();
|
||||
|
||||
if (!camera.init())
|
||||
{
|
||||
Serial.println("Error setting up the camera!");
|
||||
}
|
||||
}
|
||||
|
||||
void connectWiFi()
|
||||
{
|
||||
while (WiFi.status() != WL_CONNECTED)
|
||||
{
|
||||
Serial.println("Connecting to WiFi..");
|
||||
WiFi.begin(SSID, PASSWORD);
|
||||
delay(500);
|
||||
}
|
||||
|
||||
client.setCACert(CERTIFICATE);
|
||||
Serial.println("Connected!");
|
||||
}
|
||||
|
||||
void setup()
|
||||
{
|
||||
Serial.begin(9600);
|
||||
|
||||
while (!Serial)
|
||||
; // Wait for Serial to be ready
|
||||
|
||||
delay(1000);
|
||||
|
||||
connectWiFi();
|
||||
|
||||
setupCamera();
|
||||
|
||||
pinMode(WIO_KEY_C, INPUT_PULLUP);
|
||||
}
|
||||
|
||||
const float threshold = 0.0f;
|
||||
const float overlap_threshold = 0.20f;
|
||||
|
||||
struct Point {
|
||||
float x, y;
|
||||
};
|
||||
|
||||
struct Rect {
|
||||
Point topLeft, bottomRight;
|
||||
};
|
||||
|
||||
float area(Rect rect)
|
||||
{
|
||||
return abs(rect.bottomRight.x - rect.topLeft.x) * abs(rect.bottomRight.y - rect.topLeft.y);
|
||||
}
|
||||
|
||||
float overlappingArea(Rect rect1, Rect rect2)
|
||||
{
|
||||
float left = max(rect1.topLeft.x, rect2.topLeft.x);
|
||||
float right = min(rect1.bottomRight.x, rect2.bottomRight.x);
|
||||
float top = max(rect1.topLeft.y, rect2.topLeft.y);
|
||||
float bottom = min(rect1.bottomRight.y, rect2.bottomRight.y);
|
||||
|
||||
|
||||
if ( right > left && bottom > top )
|
||||
{
|
||||
return (right-left)*(bottom-top);
|
||||
}
|
||||
|
||||
return 0.0f;
|
||||
}
|
||||
|
||||
Rect rectFromBoundingBox(JsonVariant prediction)
|
||||
{
|
||||
JsonObject bounding_box = prediction["boundingBox"].as<JsonObject>();
|
||||
|
||||
float left = bounding_box["left"].as<float>();
|
||||
float top = bounding_box["top"].as<float>();
|
||||
float width = bounding_box["width"].as<float>();
|
||||
float height = bounding_box["height"].as<float>();
|
||||
|
||||
Point topLeft = {left, top};
|
||||
Point bottomRight = {left + width, top + height};
|
||||
|
||||
return {topLeft, bottomRight};
|
||||
}
|
||||
|
||||
void processPredictions(std::vector<JsonVariant> &predictions)
|
||||
{
|
||||
std::vector<JsonVariant> passed_predictions;
|
||||
|
||||
for (int i = 0; i < predictions.size(); ++i)
|
||||
{
|
||||
Rect prediction_1_rect = rectFromBoundingBox(predictions[i]);
|
||||
float prediction_1_area = area(prediction_1_rect);
|
||||
bool passed = true;
|
||||
|
||||
for (int j = i + 1; j < predictions.size(); ++j)
|
||||
{
|
||||
Rect prediction_2_rect = rectFromBoundingBox(predictions[j]);
|
||||
float prediction_2_area = area(prediction_2_rect);
|
||||
|
||||
float overlap = overlappingArea(prediction_1_rect, prediction_2_rect);
|
||||
float smallest_area = min(prediction_1_area, prediction_2_area);
|
||||
|
||||
if (overlap > (overlap_threshold * smallest_area))
|
||||
{
|
||||
passed = false;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (passed)
|
||||
{
|
||||
passed_predictions.push_back(predictions[i]);
|
||||
}
|
||||
}
|
||||
|
||||
for(JsonVariant prediction : passed_predictions)
|
||||
{
|
||||
String boundingBox = prediction["boundingBox"].as<String>();
|
||||
String tag = prediction["tagName"].as<String>();
|
||||
float probability = prediction["probability"].as<float>();
|
||||
|
||||
char buff[32];
|
||||
sprintf(buff, "%s:\t%.2f%%\t%s", tag.c_str(), probability * 100.0, boundingBox.c_str());
|
||||
Serial.println(buff);
|
||||
}
|
||||
|
||||
Serial.print("Counted ");
|
||||
Serial.print(passed_predictions.size());
|
||||
Serial.println(" stock items.");
|
||||
}
|
||||
|
||||
void detectStock(byte *buffer, uint32_t length)
|
||||
{
|
||||
HTTPClient httpClient;
|
||||
httpClient.begin(client, PREDICTION_URL);
|
||||
httpClient.addHeader("Content-Type", "application/octet-stream");
|
||||
httpClient.addHeader("Prediction-Key", PREDICTION_KEY);
|
||||
|
||||
int httpResponseCode = httpClient.POST(buffer, length);
|
||||
|
||||
if (httpResponseCode == 200)
|
||||
{
|
||||
String result = httpClient.getString();
|
||||
|
||||
DynamicJsonDocument doc(1024);
|
||||
deserializeJson(doc, result.c_str());
|
||||
|
||||
JsonObject obj = doc.as<JsonObject>();
|
||||
JsonArray predictions = obj["predictions"].as<JsonArray>();
|
||||
|
||||
std::vector<JsonVariant> passed_predictions;
|
||||
|
||||
for(JsonVariant prediction : predictions)
|
||||
{
|
||||
float probability = prediction["probability"].as<float>();
|
||||
if (probability > threshold)
|
||||
{
|
||||
passed_predictions.push_back(prediction);
|
||||
}
|
||||
}
|
||||
|
||||
processPredictions(passed_predictions);
|
||||
}
|
||||
|
||||
httpClient.end();
|
||||
}
|
||||
|
||||
void buttonPressed()
|
||||
{
|
||||
camera.startCapture();
|
||||
|
||||
while (!camera.captureReady())
|
||||
delay(100);
|
||||
|
||||
Serial.println("Image captured");
|
||||
|
||||
byte *buffer;
|
||||
uint32_t length;
|
||||
|
||||
if (camera.readImageToBuffer(&buffer, length))
|
||||
{
|
||||
Serial.print("Image read to buffer with length ");
|
||||
Serial.println(length);
|
||||
|
||||
detectStock(buffer, length);
|
||||
|
||||
delete (buffer);
|
||||
}
|
||||
}
|
||||
|
||||
void loop()
|
||||
{
|
||||
if (digitalRead(WIO_KEY_C) == LOW)
|
||||
{
|
||||
buttonPressed();
|
||||
delay(2000);
|
||||
}
|
||||
|
||||
delay(200);
|
||||
}
|
||||
@ -0,0 +1,11 @@
|
||||
|
||||
This directory is intended for PlatformIO Unit Testing and project tests.
|
||||
|
||||
Unit Testing is a software testing method by which individual units of
|
||||
source code, sets of one or more MCU program modules together with associated
|
||||
control data, usage procedures, and operating procedures, are tested to
|
||||
determine whether they are fit for use. Unit testing finds problems early
|
||||
in the development cycle.
|
||||
|
||||
More information about PlatformIO Unit Testing:
|
||||
- https://docs.platformio.org/page/plus/unit-testing.html
|
||||
@ -0,0 +1,40 @@
|
||||
import io
|
||||
import time
|
||||
from picamera import PiCamera
|
||||
|
||||
from azure.cognitiveservices.vision.customvision.prediction import CustomVisionPredictionClient
|
||||
from msrest.authentication import ApiKeyCredentials
|
||||
|
||||
camera = PiCamera()
|
||||
camera.resolution = (640, 480)
|
||||
camera.rotation = 0
|
||||
|
||||
time.sleep(2)
|
||||
|
||||
image = io.BytesIO()
|
||||
camera.capture(image, 'jpeg')
|
||||
image.seek(0)
|
||||
|
||||
with open('image.jpg', 'wb') as image_file:
|
||||
image_file.write(image.read())
|
||||
|
||||
prediction_url = '<prediction_url>'
|
||||
prediction_key = '<prediction key>'
|
||||
|
||||
parts = prediction_url.split('/')
|
||||
endpoint = 'https://' + parts[2]
|
||||
project_id = parts[6]
|
||||
iteration_name = parts[9]
|
||||
|
||||
prediction_credentials = ApiKeyCredentials(in_headers={"Prediction-key": prediction_key})
|
||||
predictor = CustomVisionPredictionClient(endpoint, prediction_credentials)
|
||||
|
||||
image.seek(0)
|
||||
results = predictor.detect_image(project_id, iteration_name, image)
|
||||
|
||||
threshold = 0.3
|
||||
|
||||
predictions = list(prediction for prediction in results.predictions if prediction.probability > threshold)
|
||||
|
||||
for prediction in predictions:
|
||||
print(f'{prediction.tag_name}:\t{prediction.probability * 100:.2f}%')
|
||||
@ -0,0 +1,40 @@
|
||||
from counterfit_connection import CounterFitConnection
|
||||
CounterFitConnection.init('127.0.0.1', 5000)
|
||||
|
||||
import io
|
||||
from counterfit_shims_picamera import PiCamera
|
||||
|
||||
from azure.cognitiveservices.vision.customvision.prediction import CustomVisionPredictionClient
|
||||
from msrest.authentication import ApiKeyCredentials
|
||||
|
||||
camera = PiCamera()
|
||||
camera.resolution = (640, 480)
|
||||
camera.rotation = 0
|
||||
|
||||
image = io.BytesIO()
|
||||
camera.capture(image, 'jpeg')
|
||||
image.seek(0)
|
||||
|
||||
with open('image.jpg', 'wb') as image_file:
|
||||
image_file.write(image.read())
|
||||
|
||||
prediction_url = '<prediction_url>'
|
||||
prediction_key = '<prediction key>'
|
||||
|
||||
parts = prediction_url.split('/')
|
||||
endpoint = 'https://' + parts[2]
|
||||
project_id = parts[6]
|
||||
iteration_name = parts[9]
|
||||
|
||||
prediction_credentials = ApiKeyCredentials(in_headers={"Prediction-key": prediction_key})
|
||||
predictor = CustomVisionPredictionClient(endpoint, prediction_credentials)
|
||||
|
||||
image.seek(0)
|
||||
results = predictor.detect_image(project_id, iteration_name, image)
|
||||
|
||||
threshold = 0.3
|
||||
|
||||
predictions = list(prediction for prediction in results.predictions if prediction.probability > threshold)
|
||||
|
||||
for prediction in predictions:
|
||||
print(f'{prediction.tag_name}:\t{prediction.probability * 100:.2f}%')
|
||||
@ -0,0 +1,5 @@
|
||||
.pio
|
||||
.vscode/.browse.c_cpp.db*
|
||||
.vscode/c_cpp_properties.json
|
||||
.vscode/launch.json
|
||||
.vscode/ipch
|
||||
@ -0,0 +1,7 @@
|
||||
{
|
||||
// See http://go.microsoft.com/fwlink/?LinkId=827846
|
||||
// for the documentation about the extensions.json format
|
||||
"recommendations": [
|
||||
"platformio.platformio-ide"
|
||||
]
|
||||
}
|
||||
@ -0,0 +1,39 @@
|
||||
|
||||
This directory is intended for project header files.
|
||||
|
||||
A header file is a file containing C declarations and macro definitions
|
||||
to be shared between several project source files. You request the use of a
|
||||
header file in your project source file (C, C++, etc) located in `src` folder
|
||||
by including it, with the C preprocessing directive `#include'.
|
||||
|
||||
```src/main.c
|
||||
|
||||
#include "header.h"
|
||||
|
||||
int main (void)
|
||||
{
|
||||
...
|
||||
}
|
||||
```
|
||||
|
||||
Including a header file produces the same results as copying the header file
|
||||
into each source file that needs it. Such copying would be time-consuming
|
||||
and error-prone. With a header file, the related declarations appear
|
||||
in only one place. If they need to be changed, they can be changed in one
|
||||
place, and programs that include the header file will automatically use the
|
||||
new version when next recompiled. The header file eliminates the labor of
|
||||
finding and changing all the copies as well as the risk that a failure to
|
||||
find one copy will result in inconsistencies within a program.
|
||||
|
||||
In C, the usual convention is to give header files names that end with `.h'.
|
||||
It is most portable to use only letters, digits, dashes, and underscores in
|
||||
header file names, and at most one dot.
|
||||
|
||||
Read more about using header files in official GCC documentation:
|
||||
|
||||
* Include Syntax
|
||||
* Include Operation
|
||||
* Once-Only Headers
|
||||
* Computed Includes
|
||||
|
||||
https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html
|
||||
@ -0,0 +1,46 @@
|
||||
|
||||
This directory is intended for project specific (private) libraries.
|
||||
PlatformIO will compile them to static libraries and link into executable file.
|
||||
|
||||
The source code of each library should be placed in a an own separate directory
|
||||
("lib/your_library_name/[here are source files]").
|
||||
|
||||
For example, see a structure of the following two libraries `Foo` and `Bar`:
|
||||
|
||||
|--lib
|
||||
| |
|
||||
| |--Bar
|
||||
| | |--docs
|
||||
| | |--examples
|
||||
| | |--src
|
||||
| | |- Bar.c
|
||||
| | |- Bar.h
|
||||
| | |- library.json (optional, custom build options, etc) https://docs.platformio.org/page/librarymanager/config.html
|
||||
| |
|
||||
| |--Foo
|
||||
| | |- Foo.c
|
||||
| | |- Foo.h
|
||||
| |
|
||||
| |- README --> THIS FILE
|
||||
|
|
||||
|- platformio.ini
|
||||
|--src
|
||||
|- main.c
|
||||
|
||||
and a contents of `src/main.c`:
|
||||
```
|
||||
#include <Foo.h>
|
||||
#include <Bar.h>
|
||||
|
||||
int main (void)
|
||||
{
|
||||
...
|
||||
}
|
||||
|
||||
```
|
||||
|
||||
PlatformIO Library Dependency Finder will find automatically dependent
|
||||
libraries scanning project source files.
|
||||
|
||||
More information about PlatformIO Library Dependency Finder
|
||||
- https://docs.platformio.org/page/librarymanager/ldf.html
|
||||
@ -0,0 +1,26 @@
|
||||
; PlatformIO Project Configuration File
|
||||
;
|
||||
; Build options: build flags, source filter
|
||||
; Upload options: custom upload port, speed and extra flags
|
||||
; Library options: dependencies, extra library storages
|
||||
; Advanced options: extra scripting
|
||||
;
|
||||
; Please visit documentation for the other options and examples
|
||||
; https://docs.platformio.org/page/projectconf.html
|
||||
|
||||
[env:seeed_wio_terminal]
|
||||
platform = atmelsam
|
||||
board = seeed_wio_terminal
|
||||
framework = arduino
|
||||
lib_deps =
|
||||
seeed-studio/Seeed Arduino rpcWiFi @ 1.0.5
|
||||
seeed-studio/Seeed Arduino FS @ 2.0.3
|
||||
seeed-studio/Seeed Arduino SFUD @ 2.0.1
|
||||
seeed-studio/Seeed Arduino rpcUnified @ 2.1.3
|
||||
seeed-studio/Seeed_Arduino_mbedtls @ 3.0.1
|
||||
seeed-studio/Seeed Arduino RTC @ 2.0.0
|
||||
bblanchon/ArduinoJson @ 6.17.3
|
||||
build_flags =
|
||||
-w
|
||||
-DARDUCAM_SHIELD_V2
|
||||
-DOV2640_CAM
|
||||
@ -0,0 +1,160 @@
|
||||
#pragma once
|
||||
|
||||
#include <ArduCAM.h>
|
||||
#include <Wire.h>
|
||||
|
||||
class Camera
|
||||
{
|
||||
public:
|
||||
Camera(int format, int image_size) : _arducam(OV2640, PIN_SPI_SS)
|
||||
{
|
||||
_format = format;
|
||||
_image_size = image_size;
|
||||
}
|
||||
|
||||
bool init()
|
||||
{
|
||||
// Reset the CPLD
|
||||
_arducam.write_reg(0x07, 0x80);
|
||||
delay(100);
|
||||
|
||||
_arducam.write_reg(0x07, 0x00);
|
||||
delay(100);
|
||||
|
||||
// Check if the ArduCAM SPI bus is OK
|
||||
_arducam.write_reg(ARDUCHIP_TEST1, 0x55);
|
||||
if (_arducam.read_reg(ARDUCHIP_TEST1) != 0x55)
|
||||
{
|
||||
return false;
|
||||
}
|
||||
|
||||
// Change MCU mode
|
||||
_arducam.set_mode(MCU2LCD_MODE);
|
||||
|
||||
uint8_t vid, pid;
|
||||
|
||||
// Check if the camera module type is OV2640
|
||||
_arducam.wrSensorReg8_8(0xff, 0x01);
|
||||
_arducam.rdSensorReg8_8(OV2640_CHIPID_HIGH, &vid);
|
||||
_arducam.rdSensorReg8_8(OV2640_CHIPID_LOW, &pid);
|
||||
if ((vid != 0x26) && ((pid != 0x41) || (pid != 0x42)))
|
||||
{
|
||||
return false;
|
||||
}
|
||||
|
||||
_arducam.set_format(_format);
|
||||
_arducam.InitCAM();
|
||||
_arducam.OV2640_set_JPEG_size(_image_size);
|
||||
_arducam.OV2640_set_Light_Mode(Auto);
|
||||
_arducam.OV2640_set_Special_effects(Normal);
|
||||
delay(1000);
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
void startCapture()
|
||||
{
|
||||
_arducam.flush_fifo();
|
||||
_arducam.clear_fifo_flag();
|
||||
_arducam.start_capture();
|
||||
}
|
||||
|
||||
bool captureReady()
|
||||
{
|
||||
return _arducam.get_bit(ARDUCHIP_TRIG, CAP_DONE_MASK);
|
||||
}
|
||||
|
||||
bool readImageToBuffer(byte **buffer, uint32_t &buffer_length)
|
||||
{
|
||||
if (!captureReady()) return false;
|
||||
|
||||
// Get the image file length
|
||||
uint32_t length = _arducam.read_fifo_length();
|
||||
buffer_length = length;
|
||||
|
||||
if (length >= MAX_FIFO_SIZE)
|
||||
{
|
||||
return false;
|
||||
}
|
||||
if (length == 0)
|
||||
{
|
||||
return false;
|
||||
}
|
||||
|
||||
// create the buffer
|
||||
byte *buf = new byte[length];
|
||||
|
||||
uint8_t temp = 0, temp_last = 0;
|
||||
int i = 0;
|
||||
uint32_t buffer_pos = 0;
|
||||
bool is_header = false;
|
||||
|
||||
_arducam.CS_LOW();
|
||||
_arducam.set_fifo_burst();
|
||||
|
||||
while (length--)
|
||||
{
|
||||
temp_last = temp;
|
||||
temp = SPI.transfer(0x00);
|
||||
//Read JPEG data from FIFO
|
||||
if ((temp == 0xD9) && (temp_last == 0xFF)) //If find the end ,break while,
|
||||
{
|
||||
buf[buffer_pos] = temp;
|
||||
|
||||
buffer_pos++;
|
||||
i++;
|
||||
|
||||
_arducam.CS_HIGH();
|
||||
}
|
||||
if (is_header == true)
|
||||
{
|
||||
//Write image data to buffer if not full
|
||||
if (i < 256)
|
||||
{
|
||||
buf[buffer_pos] = temp;
|
||||
buffer_pos++;
|
||||
i++;
|
||||
}
|
||||
else
|
||||
{
|
||||
_arducam.CS_HIGH();
|
||||
|
||||
i = 0;
|
||||
buf[buffer_pos] = temp;
|
||||
|
||||
buffer_pos++;
|
||||
i++;
|
||||
|
||||
_arducam.CS_LOW();
|
||||
_arducam.set_fifo_burst();
|
||||
}
|
||||
}
|
||||
else if ((temp == 0xD8) & (temp_last == 0xFF))
|
||||
{
|
||||
is_header = true;
|
||||
|
||||
buf[buffer_pos] = temp_last;
|
||||
buffer_pos++;
|
||||
i++;
|
||||
|
||||
buf[buffer_pos] = temp;
|
||||
buffer_pos++;
|
||||
i++;
|
||||
}
|
||||
}
|
||||
|
||||
_arducam.clear_fifo_flag();
|
||||
|
||||
_arducam.set_format(_format);
|
||||
_arducam.InitCAM();
|
||||
_arducam.OV2640_set_JPEG_size(_image_size);
|
||||
|
||||
// return the buffer
|
||||
*buffer = buf;
|
||||
}
|
||||
|
||||
private:
|
||||
ArduCAM _arducam;
|
||||
int _format;
|
||||
int _image_size;
|
||||
};
|
||||
@ -0,0 +1,49 @@
|
||||
#pragma once
|
||||
|
||||
#include <string>
|
||||
|
||||
using namespace std;
|
||||
|
||||
// WiFi credentials
|
||||
const char *SSID = "<SSID>";
|
||||
const char *PASSWORD = "<PASSWORD>";
|
||||
|
||||
const char *PREDICTION_URL = "<PREDICTION_URL>";
|
||||
const char *PREDICTION_KEY = "<PREDICTION_KEY>";
|
||||
|
||||
// Microsoft Azure DigiCert Global Root G2 global certificate
|
||||
const char *CERTIFICATE =
|
||||
"-----BEGIN CERTIFICATE-----\r\n"
|
||||
"MIIF8zCCBNugAwIBAgIQAueRcfuAIek/4tmDg0xQwDANBgkqhkiG9w0BAQwFADBh\r\n"
|
||||
"MQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3\r\n"
|
||||
"d3cuZGlnaWNlcnQuY29tMSAwHgYDVQQDExdEaWdpQ2VydCBHbG9iYWwgUm9vdCBH\r\n"
|
||||
"MjAeFw0yMDA3MjkxMjMwMDBaFw0yNDA2MjcyMzU5NTlaMFkxCzAJBgNVBAYTAlVT\r\n"
|
||||
"MR4wHAYDVQQKExVNaWNyb3NvZnQgQ29ycG9yYXRpb24xKjAoBgNVBAMTIU1pY3Jv\r\n"
|
||||
"c29mdCBBenVyZSBUTFMgSXNzdWluZyBDQSAwNjCCAiIwDQYJKoZIhvcNAQEBBQAD\r\n"
|
||||
"ggIPADCCAgoCggIBALVGARl56bx3KBUSGuPc4H5uoNFkFH4e7pvTCxRi4j/+z+Xb\r\n"
|
||||
"wjEz+5CipDOqjx9/jWjskL5dk7PaQkzItidsAAnDCW1leZBOIi68Lff1bjTeZgMY\r\n"
|
||||
"iwdRd3Y39b/lcGpiuP2d23W95YHkMMT8IlWosYIX0f4kYb62rphyfnAjYb/4Od99\r\n"
|
||||
"ThnhlAxGtfvSbXcBVIKCYfZgqRvV+5lReUnd1aNjRYVzPOoifgSx2fRyy1+pO1Uz\r\n"
|
||||
"aMMNnIOE71bVYW0A1hr19w7kOb0KkJXoALTDDj1ukUEDqQuBfBxReL5mXiu1O7WG\r\n"
|
||||
"0vltg0VZ/SZzctBsdBlx1BkmWYBW261KZgBivrql5ELTKKd8qgtHcLQA5fl6JB0Q\r\n"
|
||||
"gs5XDaWehN86Gps5JW8ArjGtjcWAIP+X8CQaWfaCnuRm6Bk/03PQWhgdi84qwA0s\r\n"
|
||||
"sRfFJwHUPTNSnE8EiGVk2frt0u8PG1pwSQsFuNJfcYIHEv1vOzP7uEOuDydsmCjh\r\n"
|
||||
"lxuoK2n5/2aVR3BMTu+p4+gl8alXoBycyLmj3J/PUgqD8SL5fTCUegGsdia/Sa60\r\n"
|
||||
"N2oV7vQ17wjMN+LXa2rjj/b4ZlZgXVojDmAjDwIRdDUujQu0RVsJqFLMzSIHpp2C\r\n"
|
||||
"Zp7mIoLrySay2YYBu7SiNwL95X6He2kS8eefBBHjzwW/9FxGqry57i71c2cDAgMB\r\n"
|
||||
"AAGjggGtMIIBqTAdBgNVHQ4EFgQU1cFnOsKjnfR3UltZEjgp5lVou6UwHwYDVR0j\r\n"
|
||||
"BBgwFoAUTiJUIBiV5uNu5g/6+rkS7QYXjzkwDgYDVR0PAQH/BAQDAgGGMB0GA1Ud\r\n"
|
||||
"JQQWMBQGCCsGAQUFBwMBBggrBgEFBQcDAjASBgNVHRMBAf8ECDAGAQH/AgEAMHYG\r\n"
|
||||
"CCsGAQUFBwEBBGowaDAkBggrBgEFBQcwAYYYaHR0cDovL29jc3AuZGlnaWNlcnQu\r\n"
|
||||
"Y29tMEAGCCsGAQUFBzAChjRodHRwOi8vY2FjZXJ0cy5kaWdpY2VydC5jb20vRGln\r\n"
|
||||
"aUNlcnRHbG9iYWxSb290RzIuY3J0MHsGA1UdHwR0MHIwN6A1oDOGMWh0dHA6Ly9j\r\n"
|
||||
"cmwzLmRpZ2ljZXJ0LmNvbS9EaWdpQ2VydEdsb2JhbFJvb3RHMi5jcmwwN6A1oDOG\r\n"
|
||||
"MWh0dHA6Ly9jcmw0LmRpZ2ljZXJ0LmNvbS9EaWdpQ2VydEdsb2JhbFJvb3RHMi5j\r\n"
|
||||
"cmwwHQYDVR0gBBYwFDAIBgZngQwBAgEwCAYGZ4EMAQICMBAGCSsGAQQBgjcVAQQD\r\n"
|
||||
"AgEAMA0GCSqGSIb3DQEBDAUAA4IBAQB2oWc93fB8esci/8esixj++N22meiGDjgF\r\n"
|
||||
"+rA2LUK5IOQOgcUSTGKSqF9lYfAxPjrqPjDCUPHCURv+26ad5P/BYtXtbmtxJWu+\r\n"
|
||||
"cS5BhMDPPeG3oPZwXRHBJFAkY4O4AF7RIAAUW6EzDflUoDHKv83zOiPfYGcpHc9s\r\n"
|
||||
"kxAInCedk7QSgXvMARjjOqdakor21DTmNIUotxo8kHv5hwRlGhBJwps6fEVi1Bt0\r\n"
|
||||
"trpM/3wYxlr473WSPUFZPgP1j519kLpWOJ8z09wxay+Br29irPcBYv0GMXlHqThy\r\n"
|
||||
"8y4m/HyTQeI2IMvMrQnwqPpY+rLIXyviI2vLoI+4xKE4Rn38ZZ8m\r\n"
|
||||
"-----END CERTIFICATE-----\r\n";
|
||||
@ -0,0 +1,145 @@
|
||||
#include <Arduino.h>
|
||||
#include <ArduinoJson.h>
|
||||
#include <HTTPClient.h>
|
||||
#include <list>
|
||||
#include <rpcWiFi.h>
|
||||
#include "SD/Seeed_SD.h"
|
||||
#include <Seeed_FS.h>
|
||||
#include <SPI.h>
|
||||
#include <vector>
|
||||
#include <WiFiClientSecure.h>
|
||||
|
||||
#include "config.h"
|
||||
#include "camera.h"
|
||||
|
||||
Camera camera = Camera(JPEG, OV2640_640x480);
|
||||
|
||||
WiFiClientSecure client;
|
||||
|
||||
void setupCamera()
|
||||
{
|
||||
pinMode(PIN_SPI_SS, OUTPUT);
|
||||
digitalWrite(PIN_SPI_SS, HIGH);
|
||||
|
||||
Wire.begin();
|
||||
SPI.begin();
|
||||
|
||||
if (!camera.init())
|
||||
{
|
||||
Serial.println("Error setting up the camera!");
|
||||
}
|
||||
}
|
||||
|
||||
void connectWiFi()
|
||||
{
|
||||
while (WiFi.status() != WL_CONNECTED)
|
||||
{
|
||||
Serial.println("Connecting to WiFi..");
|
||||
WiFi.begin(SSID, PASSWORD);
|
||||
delay(500);
|
||||
}
|
||||
|
||||
client.setCACert(CERTIFICATE);
|
||||
Serial.println("Connected!");
|
||||
}
|
||||
|
||||
void setup()
|
||||
{
|
||||
Serial.begin(9600);
|
||||
|
||||
while (!Serial)
|
||||
; // Wait for Serial to be ready
|
||||
|
||||
delay(1000);
|
||||
|
||||
connectWiFi();
|
||||
|
||||
setupCamera();
|
||||
|
||||
pinMode(WIO_KEY_C, INPUT_PULLUP);
|
||||
}
|
||||
|
||||
const float threshold = 0.3f;
|
||||
|
||||
void processPredictions(std::vector<JsonVariant> &predictions)
|
||||
{
|
||||
for(JsonVariant prediction : predictions)
|
||||
{
|
||||
String tag = prediction["tagName"].as<String>();
|
||||
float probability = prediction["probability"].as<float>();
|
||||
|
||||
char buff[32];
|
||||
sprintf(buff, "%s:\t%.2f%%", tag.c_str(), probability * 100.0);
|
||||
Serial.println(buff);
|
||||
}
|
||||
}
|
||||
|
||||
void detectStock(byte *buffer, uint32_t length)
|
||||
{
|
||||
HTTPClient httpClient;
|
||||
httpClient.begin(client, PREDICTION_URL);
|
||||
httpClient.addHeader("Content-Type", "application/octet-stream");
|
||||
httpClient.addHeader("Prediction-Key", PREDICTION_KEY);
|
||||
|
||||
int httpResponseCode = httpClient.POST(buffer, length);
|
||||
|
||||
if (httpResponseCode == 200)
|
||||
{
|
||||
String result = httpClient.getString();
|
||||
|
||||
DynamicJsonDocument doc(1024);
|
||||
deserializeJson(doc, result.c_str());
|
||||
|
||||
JsonObject obj = doc.as<JsonObject>();
|
||||
JsonArray predictions = obj["predictions"].as<JsonArray>();
|
||||
|
||||
std::vector<JsonVariant> passed_predictions;
|
||||
|
||||
for(JsonVariant prediction : predictions)
|
||||
{
|
||||
float probability = prediction["probability"].as<float>();
|
||||
if (probability > threshold)
|
||||
{
|
||||
passed_predictions.push_back(prediction);
|
||||
}
|
||||
}
|
||||
|
||||
processPredictions(passed_predictions);
|
||||
}
|
||||
|
||||
httpClient.end();
|
||||
}
|
||||
|
||||
void buttonPressed()
|
||||
{
|
||||
camera.startCapture();
|
||||
|
||||
while (!camera.captureReady())
|
||||
delay(100);
|
||||
|
||||
Serial.println("Image captured");
|
||||
|
||||
byte *buffer;
|
||||
uint32_t length;
|
||||
|
||||
if (camera.readImageToBuffer(&buffer, length))
|
||||
{
|
||||
Serial.print("Image read to buffer with length ");
|
||||
Serial.println(length);
|
||||
|
||||
detectStock(buffer, length);
|
||||
|
||||
delete (buffer);
|
||||
}
|
||||
}
|
||||
|
||||
void loop()
|
||||
{
|
||||
if (digitalRead(WIO_KEY_C) == LOW)
|
||||
{
|
||||
buttonPressed();
|
||||
delay(2000);
|
||||
}
|
||||
|
||||
delay(200);
|
||||
}
|
||||
@ -0,0 +1,11 @@
|
||||
|
||||
This directory is intended for PlatformIO Unit Testing and project tests.
|
||||
|
||||
Unit Testing is a software testing method by which individual units of
|
||||
source code, sets of one or more MCU program modules together with associated
|
||||
control data, usage procedures, and operating procedures, are tested to
|
||||
determine whether they are fit for use. Unit testing finds problems early
|
||||
in the development cycle.
|
||||
|
||||
More information about PlatformIO Unit Testing:
|
||||
- https://docs.platformio.org/page/plus/unit-testing.html
|
||||
@ -0,0 +1,163 @@
|
||||
# Count stock from your IoT device - Virtual IoT Hardware and Raspberry Pi
|
||||
|
||||
A combination of the predictions and their bounding boxes can be used to count stock in an image
|
||||
|
||||
## Show bounding boxes
|
||||
|
||||
As a helpful debugging step you can not only print out the bounding boxes, but you can also draw them on the image that was written to disk when an image was captured.
|
||||
|
||||
### Task - print the bounding boxes
|
||||
|
||||
1. Ensure the `stock-counter` project is open in VS Code, and the virtual environment is activated if you are using a virtual IoT device.
|
||||
|
||||
1. Change the `print` statement in the `for` loop to the following to print the bounding boxes to the console:
|
||||
|
||||
```python
|
||||
print(f'{prediction.tag_name}:\t{prediction.probability * 100:.2f}%\t{prediction.bounding_box}')
|
||||
```
|
||||
|
||||
1. Run the app with the camera pointing at some stock on a shelf. The bounding boxes will be printed to the console, with left, top, width and height values from 0-1.
|
||||
|
||||
```output
|
||||
pi@raspberrypi:~/stock-counter $ python3 app.py
|
||||
tomato paste: 33.42% {'additional_properties': {}, 'left': 0.3455171, 'top': 0.09916268, 'width': 0.14175442, 'height': 0.29405564}
|
||||
tomato paste: 34.41% {'additional_properties': {}, 'left': 0.48283678, 'top': 0.10242918, 'width': 0.11782813, 'height': 0.27467814}
|
||||
tomato paste: 31.25% {'additional_properties': {}, 'left': 0.4923783, 'top': 0.35007596, 'width': 0.13668466, 'height': 0.28304994}
|
||||
tomato paste: 31.05% {'additional_properties': {}, 'left': 0.36416405, 'top': 0.37494493, 'width': 0.14024884, 'height': 0.26880276}
|
||||
```
|
||||
|
||||
### Task - draw bounding boxes on the image
|
||||
|
||||
1. The Pip package [Pillow](https://pypi.org/project/Pillow/) can be used to draw on images. Install this with the following command:
|
||||
|
||||
```sh
|
||||
pip3 install pillow
|
||||
```
|
||||
|
||||
If you are using a virtual IoT device, make sure to run this from inside the activated virtual environment.
|
||||
|
||||
1. Add the following import statement to the top of the `app.py` file:
|
||||
|
||||
```python
|
||||
from PIL import Image, ImageDraw, ImageColor
|
||||
```
|
||||
|
||||
This imports code needed to edit the image.
|
||||
|
||||
1. Add the following code to the end of the `app.py` file:
|
||||
|
||||
```python
|
||||
with Image.open('image.jpg') as im:
|
||||
draw = ImageDraw.Draw(im)
|
||||
|
||||
for prediction in predictions:
|
||||
scale_left = prediction.bounding_box.left
|
||||
scale_top = prediction.bounding_box.top
|
||||
scale_right = prediction.bounding_box.left + prediction.bounding_box.width
|
||||
scale_bottom = prediction.bounding_box.top + prediction.bounding_box.height
|
||||
|
||||
left = scale_left * im.width
|
||||
top = scale_top * im.height
|
||||
right = scale_right * im.width
|
||||
bottom = scale_bottom * im.height
|
||||
|
||||
draw.rectangle([left, top, right, bottom], outline=ImageColor.getrgb('red'), width=2)
|
||||
|
||||
im.save('image.jpg')
|
||||
```
|
||||
|
||||
This code opens the image that was saved earlier for editing. It then loops through the predictions getting the bounding boxes, and calculates the bottom right coordinate using the bounding box values from 0-1. These are then converted to image coordinates by multiplying by the relevant dimension of the image. For example, if the left value was 0.5 on an image that was 600 pixels wide, this would convert it to 300 (0.5 x 600 = 300).
|
||||
|
||||
Each bounding box is drawn on the image using a red line. Finally the edited image is saved, overwriting the original image.
|
||||
|
||||
1. Run the app with the camera pointing at some stock on a shelf. You will see the `image.jpg` file in the VS Code explorer, and you will be able to select it to see the bounding boxes.
|
||||
|
||||
|
||||
|
||||
## Count stock
|
||||
|
||||
In the image shown above, the bounding boxes have a small overlap. If this overlap was much larger, then the bounding boxes may indicate the same object. To count the objects correctly, you need to ignore boxes with a significant overlap.
|
||||
|
||||
### Task - count stock ignoring overlap
|
||||
|
||||
1. The Pip package [Shapely](https://pypi.org/project/Shapely/) can be used to calculate the intersection. If you are using a Raspberry Pi, you will need to instal a library dependency first:
|
||||
|
||||
```sh
|
||||
sudo apt install libgeos-dev
|
||||
```
|
||||
|
||||
1. Install the Shapely Pip package:
|
||||
|
||||
```sh
|
||||
pip3 install shapely
|
||||
```
|
||||
|
||||
If you are using a virtual IoT device, make sure to run this from inside the activated virtual environment.
|
||||
|
||||
1. Add the following import statement to the top of the `app.py` file:
|
||||
|
||||
```python
|
||||
from shapely.geometry import Polygon
|
||||
```
|
||||
|
||||
This imports code needed to create polygons to calculate overlap.
|
||||
|
||||
1. Above the code that draws the bounding boxes, add the following code:
|
||||
|
||||
```python
|
||||
overlap_threshold = 0.20
|
||||
```
|
||||
|
||||
This defines the percentage overlap allowed before the bounding boxes are considered to be the same object. 0.20 defines a 20% overlap.
|
||||
|
||||
1. To calculate overlap using Shapely, the bounding boxes need to be converted into Shapely polygons. Add the following function to do this:
|
||||
|
||||
```python
|
||||
def create_polygon(prediction):
|
||||
scale_left = prediction.bounding_box.left
|
||||
scale_top = prediction.bounding_box.top
|
||||
scale_right = prediction.bounding_box.left + prediction.bounding_box.width
|
||||
scale_bottom = prediction.bounding_box.top + prediction.bounding_box.height
|
||||
|
||||
return Polygon([(scale_left, scale_top), (scale_right, scale_top), (scale_right, scale_bottom), (scale_left, scale_bottom)])
|
||||
```
|
||||
|
||||
This creates a polygon using the bounding box of a prediction.
|
||||
|
||||
1. The logic for removing overlapping objects involves comparing all bounding boxes and if any pairs of predictions have bounding boxes that overlap more than the threshold, delete one of the predictions. To compare all the predictions, you compare prediction 1 with 2, 3, 4, etc., then 2 with 3, 4, etc. The following code does this:
|
||||
|
||||
```python
|
||||
to_delete = []
|
||||
|
||||
for i in range(0, len(predictions)):
|
||||
polygon_1 = create_polygon(predictions[i])
|
||||
|
||||
for j in range(i+1, len(predictions)):
|
||||
polygon_2 = create_polygon(predictions[j])
|
||||
overlap = polygon_1.intersection(polygon_2).area
|
||||
|
||||
smallest_area = min(polygon_1.area, polygon_2.area)
|
||||
|
||||
if overlap > (overlap_threshold * smallest_area):
|
||||
to_delete.append(predictions[i])
|
||||
break
|
||||
|
||||
for d in to_delete:
|
||||
predictions.remove(d)
|
||||
|
||||
print(f'Counted {len(predictions)} stock items')
|
||||
```
|
||||
|
||||
The overlap is calculated using the Shapely `Polygon.intersection` method that returns a polygon that has the overlap. The area is then calculated from this polygon. This overlap threshold is not an absolute value, but needs to be a percentage of the bounding box, so the smallest bounding box is found, and the overlap threshold is used to calculate what area the overlap can be to not exceed the percentage overlap threshold of the smallest bounding box. If the overlap exceeds this, the prediction is marked for deletion.
|
||||
|
||||
Once a prediction has been marked for deletion it doesn't need to be checked again, so the inner loop breaks out to check the next prediction. You can't delete items from a list whilst iterating through it, so the bounding boxes that overlap more than the threshold are added to the `to_delete` list, then deleted at the end.
|
||||
|
||||
Finally the stock count is printed to the console. This could then be sent to an IoT service to alert if the stock levels are low. All of this code is before the bounding boxes are drawn, so you will see the stock predictions without overlaps on the generated images.
|
||||
|
||||
> 💁 This is very simplistic way to remove overlaps, just removing the first one in an overlapping pair. For production code, you would want to put more logic in here, such as considering the overlaps between multiple objects, or if one bounding box is contained by another.
|
||||
|
||||
1. Run the app with the camera pointing at some stock on a shelf. The output will indicate the number of bounding boxes without overlaps that exceed the threshold. Try adjusting the `overlap_threshold` value to see predictions being ignored.
|
||||
|
||||
> 💁 You can find this code in the [code-count/pi](code-count/pi) or [code-count/virtual-device](code-count/virtual-device) folder.
|
||||
|
||||
😀 Your stock counter program was a success!
|
||||
@ -0,0 +1,74 @@
|
||||
# Call your object detector from your IoT device - Virtual IoT Hardware and Raspberry Pi
|
||||
|
||||
Once your object detector has been published, it can be used from your IoT device.
|
||||
|
||||
## Copy the image classifier project
|
||||
|
||||
The majority of your stock detector is the same as the image classifier you created in a previous lesson.
|
||||
|
||||
### Task - copy the image classifier project
|
||||
|
||||
1. Create a folder called `stock-counter` either on your computer if you are using a virtual IoT device, or on your Raspberry Pi. If you are using a virtual IoT device make sure you set up a virtual environment.
|
||||
|
||||
1. Set up the camera hardware.
|
||||
|
||||
* If you are using a Raspberry Pi you will need to fit the PiCamera. You might also want to fix the camera in a single position, for example, by hanging the cable over a box or can, or fixing the camera to a box with double-sided tape.
|
||||
* If you are using a virtual IoT device then you will need to install CounterFit and the CounterFit PyCamera shim. If you are going to use still images, then capture some images that your object detector hasn't seen yet, if you are going to use your web cam make sure it is positioned in a way that can see the stock you are detecting.
|
||||
|
||||
1. Replicate the steps from [lesson 2 of the manufacturing project](../../../4-manufacturing/lessons/2-check-fruit-from-device/README.md#task---capture-an-image-using-an-iot-device) to capture images from the camera.
|
||||
|
||||
1. Replicate the steps from [lesson 2 of the manufacturing project](../../../4-manufacturing/lessons/2-check-fruit-from-device/README.md#task---classify-images-from-your-iot-device) to call the image classifier. The majority of this code will be re-used to detect objects.
|
||||
|
||||
## Change the code from a classifier to an image detector
|
||||
|
||||
The code you used to classify images is very similar to the code to detect objects. The main difference is the method called on the Custom Vision SDK, and the results of the call.
|
||||
|
||||
### Task - change the code from a classifier to an image detector
|
||||
|
||||
1. Delete the three lines of code that classifies the image and processes the predictions:
|
||||
|
||||
```python
|
||||
results = predictor.classify_image(project_id, iteration_name, image)
|
||||
|
||||
for prediction in results.predictions:
|
||||
print(f'{prediction.tag_name}:\t{prediction.probability * 100:.2f}%')
|
||||
```
|
||||
|
||||
Remove these three lines.
|
||||
|
||||
1. Add the following code to detect objects in the image:
|
||||
|
||||
```python
|
||||
results = predictor.detect_image(project_id, iteration_name, image)
|
||||
|
||||
threshold = 0.3
|
||||
|
||||
predictions = list(prediction for prediction in results.predictions if prediction.probability > threshold)
|
||||
|
||||
for prediction in predictions:
|
||||
print(f'{prediction.tag_name}:\t{prediction.probability * 100:.2f}%')
|
||||
```
|
||||
|
||||
This code calls the `detect_image` method on the predictor to run the object detector. It then gathers all the predictions with a probability above a threshold, printing them to the console.
|
||||
|
||||
Unlike an image classifier that only returns one result per tag, the object detector will return multiple results, so any with a low probability need to be filtered out.
|
||||
|
||||
1. Run this code and it will capture an image, sending it to the object detector, and print out the detected objects. If you are using a virtual IoT device ensure you have an appropriate image set in CounterFit, or our web cam is selected. If you are using a Raspberry Pi, make sure your camera is pointing to objects on a shelf.
|
||||
|
||||
```output
|
||||
pi@raspberrypi:~/stock-counter $ python3 app.py
|
||||
tomato paste: 34.13%
|
||||
tomato paste: 33.95%
|
||||
tomato paste: 35.05%
|
||||
tomato paste: 32.80%
|
||||
```
|
||||
|
||||
> 💁 You may need to adjust the `threshold` to an appropriate value for your images.
|
||||
|
||||
You will be able to see the image that was taken, and these values in the **Predictions** tab in Custom Vision.
|
||||
|
||||
|
||||
|
||||
> 💁 You can find this code in the [code-detect/pi](code-detect/pi) or [code-detect/virtual-device](code-detect/virtual-device) folder.
|
||||
|
||||
😀 Your stock counter program was a success!
|
||||
@ -0,0 +1,167 @@
|
||||
# Count stock from your IoT device - Wio Terminal
|
||||
|
||||
A combination of the predictions and their bounding boxes can be used to count stock in an image.
|
||||
|
||||
## Count stock
|
||||
|
||||
|
||||
|
||||
In the image shown above, the bounding boxes have a small overlap. If this overlap was much larger, then the bounding boxes may indicate the same object. To count the objects correctly, you need to ignore boxes with a significant overlap.
|
||||
|
||||
### Task - count stock ignoring overlap
|
||||
|
||||
1. Open your `stock-counter` project if it is not already open.
|
||||
|
||||
1. Above the `processPredictions` function, add the following code:
|
||||
|
||||
```cpp
|
||||
const float overlap_threshold = 0.20f;
|
||||
```
|
||||
|
||||
This defines the percentage overlap allowed before the bounding boxes are considered to be the same object. 0.20 defines a 20% overlap.
|
||||
|
||||
1. Below this, and above the `processPredictions` function, add the following code to calculate the overlap between two rectangles:
|
||||
|
||||
```cpp
|
||||
struct Point {
|
||||
float x, y;
|
||||
};
|
||||
|
||||
struct Rect {
|
||||
Point topLeft, bottomRight;
|
||||
};
|
||||
|
||||
float area(Rect rect)
|
||||
{
|
||||
return abs(rect.bottomRight.x - rect.topLeft.x) * abs(rect.bottomRight.y - rect.topLeft.y);
|
||||
}
|
||||
|
||||
float overlappingArea(Rect rect1, Rect rect2)
|
||||
{
|
||||
float left = max(rect1.topLeft.x, rect2.topLeft.x);
|
||||
float right = min(rect1.bottomRight.x, rect2.bottomRight.x);
|
||||
float top = max(rect1.topLeft.y, rect2.topLeft.y);
|
||||
float bottom = min(rect1.bottomRight.y, rect2.bottomRight.y);
|
||||
|
||||
|
||||
if ( right > left && bottom > top )
|
||||
{
|
||||
return (right-left)*(bottom-top);
|
||||
}
|
||||
|
||||
return 0.0f;
|
||||
}
|
||||
```
|
||||
|
||||
This code defines a `Point` struct to store points on the image, and a `Rect` struct to define a rectangle using a top left and bottom right coordinate. It then defines an `area` function that calculates the area of a rectangle from a top left and bottom right coordinate.
|
||||
|
||||
Next it defines a `overlappingArea` function that calculates the overlapping area of 2 rectangles. If they don't overlap, it returns 0.
|
||||
|
||||
1. Below the `overlappingArea` function, declare a function to convert a bounding box to a `Rect`:
|
||||
|
||||
```cpp
|
||||
Rect rectFromBoundingBox(JsonVariant prediction)
|
||||
{
|
||||
JsonObject bounding_box = prediction["boundingBox"].as<JsonObject>();
|
||||
|
||||
float left = bounding_box["left"].as<float>();
|
||||
float top = bounding_box["top"].as<float>();
|
||||
float width = bounding_box["width"].as<float>();
|
||||
float height = bounding_box["height"].as<float>();
|
||||
|
||||
Point topLeft = {left, top};
|
||||
Point bottomRight = {left + width, top + height};
|
||||
|
||||
return {topLeft, bottomRight};
|
||||
}
|
||||
```
|
||||
|
||||
This takes a prediction from the object detector, extracts the bounding box and uses the values on the bounding box to define a rectangle. The right side is calculated from the left plus the width. The bottom is calculated as the top plus the height.
|
||||
|
||||
1. The predictions need to be compared to each other, and if 2 predictions have an overlap of more that the threshold, one of them needs to be deleted. The overlap threshold is a percentage, so needs to be multiplied by the size of the smallest bounding box to check that the overlap exceeds the given percentage of the bounding box, not the given percentage of the whole image. Start by deleting the content of the `processPredictions` function.
|
||||
|
||||
1. Add the following to the empty `processPredictions` function:
|
||||
|
||||
```cpp
|
||||
std::vector<JsonVariant> passed_predictions;
|
||||
|
||||
for (int i = 0; i < predictions.size(); ++i)
|
||||
{
|
||||
Rect prediction_1_rect = rectFromBoundingBox(predictions[i]);
|
||||
float prediction_1_area = area(prediction_1_rect);
|
||||
bool passed = true;
|
||||
|
||||
for (int j = i + 1; j < predictions.size(); ++j)
|
||||
{
|
||||
Rect prediction_2_rect = rectFromBoundingBox(predictions[j]);
|
||||
float prediction_2_area = area(prediction_2_rect);
|
||||
|
||||
float overlap = overlappingArea(prediction_1_rect, prediction_2_rect);
|
||||
float smallest_area = min(prediction_1_area, prediction_2_area);
|
||||
|
||||
if (overlap > (overlap_threshold * smallest_area))
|
||||
{
|
||||
passed = false;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (passed)
|
||||
{
|
||||
passed_predictions.push_back(predictions[i]);
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
This code declares a vector to store the predictions that don't overlap. It then loops through all the predictions, creating a `Rect` from the bounding box.
|
||||
|
||||
Next this code loops through the remaining predictions, starting at the one after the current prediction. This stops predictions being compared more than once - once 1 and 2 have been compared, there's no need to compare 2 with 1, only with 3, 4, etc.
|
||||
|
||||
For each pair of predictions the overlapping area is calculated. This is then compared to the area of the smallest bounding box - if the overlap exceeds the threshold percentage of the smallest bounding box, the prediction is marked as not passed. If after comparing all the overlap, the prediction passes the checks it is added to the `passed_predictions` collection.
|
||||
|
||||
> 💁 This is very simplistic way to remove overlaps, just removing the first one in an overlapping pair. For production code, you would want to put more logic in here, such as considering the overlaps between multiple objects, or if one bounding box is contained by another.
|
||||
|
||||
1. After this, add the following code to send details of the passed predictions to the serial monitor:
|
||||
|
||||
```cpp
|
||||
for(JsonVariant prediction : passed_predictions)
|
||||
{
|
||||
String boundingBox = prediction["boundingBox"].as<String>();
|
||||
String tag = prediction["tagName"].as<String>();
|
||||
float probability = prediction["probability"].as<float>();
|
||||
|
||||
char buff[32];
|
||||
sprintf(buff, "%s:\t%.2f%%\t%s", tag.c_str(), probability * 100.0, boundingBox.c_str());
|
||||
Serial.println(buff);
|
||||
}
|
||||
```
|
||||
|
||||
This code loops through the passed predictions and prints their details to the serial monitor.
|
||||
|
||||
1. Below this, add code to print the number of counted items to the serial monitor:
|
||||
|
||||
```cpp
|
||||
Serial.print("Counted ");
|
||||
Serial.print(passed_predictions.size());
|
||||
Serial.println(" stock items.");
|
||||
```
|
||||
|
||||
This could then be sent to an IoT service to alert if the stock levels are low.
|
||||
|
||||
1. Upload and run your code. Point the camera at objects on a shelf and press the C button. Try adjusting the `overlap_threshold` value to see predictions being ignored.
|
||||
|
||||
```output
|
||||
Connecting to WiFi..
|
||||
Connected!
|
||||
Image captured
|
||||
Image read to buffer with length 17416
|
||||
tomato paste: 35.84% {"left":0.395631,"top":0.215897,"width":0.180768,"height":0.359364}
|
||||
tomato paste: 35.87% {"left":0.378554,"top":0.583012,"width":0.14824,"height":0.359382}
|
||||
tomato paste: 34.11% {"left":0.699024,"top":0.592617,"width":0.124411,"height":0.350456}
|
||||
tomato paste: 35.16% {"left":0.513006,"top":0.647853,"width":0.187472,"height":0.325817}
|
||||
Counted 4 stock items.
|
||||
```
|
||||
|
||||
> 💁 You can find this code in the [code-count/wio-terminal](code-count/wio-terminal) folder.
|
||||
|
||||
😀 Your stock counter program was a success!
|
||||
@ -0,0 +1,102 @@
|
||||
# Call your object detector from your IoT device - Wio Terminal
|
||||
|
||||
Once your object detector has been published, it can be used from your IoT device.
|
||||
|
||||
## Copy the image classifier project
|
||||
|
||||
The majority of your stock detector is the same as the image classifier you created in a previous lesson.
|
||||
|
||||
### Task - copy the image classifier project
|
||||
|
||||
1. Connect your ArduCam your Wio Terminal, following the steps from [lesson 2 of the manufacturing project](../../../4-manufacturing/lessons/2-check-fruit-from-device/wio-terminal-camera.md#task---connect-the-camera).
|
||||
|
||||
You might also want to fix the camera in a single position, for example, by hanging the cable over a box or can, or fixing the camera to a box with double-sided tape.
|
||||
|
||||
1. Create a brand new Wio Terminal project using PlatformIO. Call this project `stock-counter`.
|
||||
|
||||
1. Replicate the steps from [lesson 2 of the manufacturing project](../../../4-manufacturing/lessons/2-check-fruit-from-device/README.md#task---capture-an-image-using-an-iot-device) to capture images from the camera.
|
||||
|
||||
1. Replicate the steps from [lesson 2 of the manufacturing project](../../../4-manufacturing/lessons/2-check-fruit-from-device/README.md#task---classify-images-from-your-iot-device) to call the image classifier. The majority of this code will be re-used to detect objects.
|
||||
|
||||
## Change the code from a classifier to an image detector
|
||||
|
||||
The code you used to classify images is very similar to the code to detect objects. The main difference is the URL that is called that you obtained from Custom Vision, and the results of the call.
|
||||
|
||||
### Task - change the code from a classifier to an image detector
|
||||
|
||||
1. Add the following include directive to the top of the `main.cpp` file:
|
||||
|
||||
```cpp
|
||||
#include <vector>
|
||||
```
|
||||
|
||||
1. Rename the `classifyImage` function to `detectStock`, both the name of the function and the call in the `buttonPressed` function.
|
||||
|
||||
1. Above the `detectStock` function, declare a threshold to filter out any detections that have a low probability:
|
||||
|
||||
```cpp
|
||||
const float threshold = 0.3f;
|
||||
```
|
||||
|
||||
Unlike an image classifier that only returns one result per tag, the object detector will return multiple results, so any with a low probability need to be filtered out.
|
||||
|
||||
1. Above the `detectStock` function, declare a function to process the predictions:
|
||||
|
||||
```cpp
|
||||
void processPredictions(std::vector<JsonVariant> &predictions)
|
||||
{
|
||||
for(JsonVariant prediction : predictions)
|
||||
{
|
||||
String tag = prediction["tagName"].as<String>();
|
||||
float probability = prediction["probability"].as<float>();
|
||||
|
||||
char buff[32];
|
||||
sprintf(buff, "%s:\t%.2f%%", tag.c_str(), probability * 100.0);
|
||||
Serial.println(buff);
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
This takes a list of predictions and prints them to the serial monitor.
|
||||
|
||||
1. In the `detectStock` function, replace the contents of the `for` loop that loops through the predictions with the following:
|
||||
|
||||
```cpp
|
||||
std::vector<JsonVariant> passed_predictions;
|
||||
|
||||
for(JsonVariant prediction : predictions)
|
||||
{
|
||||
float probability = prediction["probability"].as<float>();
|
||||
if (probability > threshold)
|
||||
{
|
||||
passed_predictions.push_back(prediction);
|
||||
}
|
||||
}
|
||||
|
||||
processPredictions(passed_predictions);
|
||||
```
|
||||
|
||||
This loops through the predictions, comparing the probability to the threshold. All predictions that have a probability higher than the threshold are added to a `list` and passed to the `processPredictions` function.
|
||||
|
||||
1. Upload and run your code. Point the camera at objects on a shelf and press the C button. You will see the output in the serial monitor:
|
||||
|
||||
```output
|
||||
Connecting to WiFi..
|
||||
Connected!
|
||||
Image captured
|
||||
Image read to buffer with length 17416
|
||||
tomato paste: 35.84%
|
||||
tomato paste: 35.87%
|
||||
tomato paste: 34.11%
|
||||
tomato paste: 35.16%
|
||||
```
|
||||
|
||||
> 💁 You may need to adjust the `threshold` to an appropriate value for your images.
|
||||
|
||||
You will be able to see the image that was taken, and these values in the **Predictions** tab in Custom Vision.
|
||||
|
||||
|
||||
|
||||
> 💁 You can find this code in the [code-detect/wio-terminal](code-detect/wio-terminal) folder.
|
||||
|
||||
😀 Your stock counter program was a success!
|
||||
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After Width: | Height: | Size: 181 KiB |
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After Width: | Height: | Size: 441 KiB |
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After Width: | Height: | Size: 260 KiB |
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After Width: | Height: | Size: 31 KiB |
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Reference in new issue