05-30-2020, 06:37 AM
One way to do this :
1) Use Colors > Threshold on face freckle texture to identify the value of the darkest pixels : drag the black triangle to the right and stop when black pixels start appearing ; this will give you the value of darkest pixels. Cancel the Threshold Tool (no need to apply it).
2) Use Colors > RGB Clip... on neck freckle texture : set the Low limit value to one you have identified at the previous step (you may have to divide this value by 255 if you are working in 8bits, because this filter is working in 32bits floating point)
1) Use Colors > Threshold on face freckle texture to identify the value of the darkest pixels : drag the black triangle to the right and stop when black pixels start appearing ; this will give you the value of darkest pixels. Cancel the Threshold Tool (no need to apply it).
2) Use Colors > RGB Clip... on neck freckle texture : set the Low limit value to one you have identified at the previous step (you may have to divide this value by 255 if you are working in 8bits, because this filter is working in 32bits floating point)