Chris.
EDIT: Do this with the L or L* as an inverted mask. Missed that all important detail.
Image > Extract L*
Processes > LRGBCombination
Select L channel image - the extracted L*
Deselect RGB channels below
Tick Chrominance noise
Top slider 0.5 nominally (default)
Slider below as required - 0.1 to 0.2 nominally. Light on data don't over do it.
Click the square button not the round.
Manipulating the contrast of L* in HistogramTransformation is a way of increasing /decreasing the saturation effect.
EDIT: This comes after Histo stretch, SCNR, L* Extract and use as mask, HDRWavelet...
Last edited by rcheshire; 06-04-2017 at 07:09 AM.
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