Bounding boxes and distortion

 This week I was mainly focused on the ways to distort bounding boxes. Unfortunately, albuminations do not provide the functionality of distorting bounding-boxes. That is why I have had to experiment with different approach.


Changing nothing

The very first approach I have used was simple: I have just distorted the image, without changing the bounding boxes. And actually, it did work (but for objects that are in the center only). 

Distorting coordinates

I was using an approach from this post on OpenCV blog. It suggest a way to redistort points. Actually, it is better than changing nothing.


Ellipse

Another approach was to simply change coordinates to the form of an ellipse (x and y of the center + radii). This approach was proposed in this paper.  In the paper, this approach has beaten the original box method, but I believe that to use it in the project, manual annotations are required.

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