Abstract
I have just made new algorithm, I called TCNN (Trace Contour Nearest Neighbor).
It is the loop, that contains tree steps:
1. Tracing the shapes with 1-pixel contours and contours of this contours as many times, that the whole image is filled with it.
2. Changing the size of the image with nearest neighbor mode (in this case proportionally 50%) to result flat color in place of complex multi-contour structure.
3. Returning previous size of the image also with nearest neighbor mode.
I haven't examined it in more than 1100 generations yet, but it seems that the process could go to infinity. I also discovered, that for transformation of this particular base image (diagonally asymetric colors) there is some moment in wich it becomes actual symetric. I cropped the composition to this frame.
The TCNN algorithm animation.