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Monocolor and thresholds

Posted: June 13th, 2013, 9:36 am
by tomczak
Would anybody know how Monocolor actually works? What are the thresholds that determine what's colour, what's gray? I experimented on test image a bit, and it appears that if the chosen RBG channel has a higher value that the other two, it retains some saturation, but I'm still not sure if this is true.

Also, what would be a good preprocessing idea before Monocolor, to influence what's included in the 'color' part and what becomes pure gray?

Re: Monocolor and thresholds

Posted: June 13th, 2013, 12:10 pm
by jsachs
Monocolor attempts to render the image as accurately as possible using just varying amounts of white and the selected color and preserving luminance. The math - taken from a technical journal - is a little complicated and there are no thresholds as such.