detecting blemish in skin
I want to extract image like the image above in skin.
i've tried edge detection(canny, sobel) and filled contours, but It wasn't what I wanted.
i've also tried using a* value in lab color block, apply adaptive threshold, but It wasn't what I wanted
How can i get the above results?
Just intirely area or just any roi area?
above image is partial , I want to extract entire face area , in my guess it extracted brown and red but i don't know how to get it using opencv