Original image with 104130 colors

Original image after color reduction
7 color levels
25590 CCs

Image after CCs filtering
2467 CCs

Image after inital grouping procedure
1976 CCs

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Initial grouping for CCs of color plane 4

Final grouping for CCs of color plane 4 (invalid connections removal)

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Final result with all color planes (Tp=0.7)
47 groups
793 CCs