Add tier3 project

Projects/3-Advanced/FishEye-Removal-App.md

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+# FishEye Distortion Removal App
+
+**Tier:** 3-Advanced
+
+Straighten photos taken with wide-angle lenses. These lens type allows more of the scene to be included in the photograph but distort the perspective, with this app one should be able to correct such distortion.
+
+-   This application will help users correct the perspective of their photos.
+
+## User Stories
+
+-   [ ] User can apply distortion to an input image.
+-   [ ] User set the parameters of the lens used for taking the image.
+-   [ ] User can save the resulting image.
+
+## Bonus features
+
+-   [ ] User can select lens parameter from known lens database.
+-   [ ] User can preview the resulting photo while changing parameters.
+
+
+## Useful links and resources
+
+-   [Lens correction model](http://hugin.sourceforge.net/docs/manual/Lens_correction_model.html)
+-   [Spreadsheet with correction macros](https://4pi.org/downloads/abc.xls)
+-   [Database of known lens with parameters](https://lensfun.github.io/)
+
+## Example projects
+
+[Simple implementation of the barrel distortion correction for JPEG](https://github.com/Mihaylov93/UnBarrel)
+