Original image with 160195 colors

Original image after color reduction
6 color levels
34850 CCs

Image after CCs filtering
3423 CCs

Image after inital grouping procedure
2459 CCs

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Initial grouping for CCs of color plane 5

Final grouping for CCs of color plane 5 (invalid connections removal)

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Final result with all color planes (Tp=0.75)
29 groups
424 CCs