Alberto Griggio 1a3fd9f157 Added new color toning method "L*a*b* regions"
Allows to specify various "regions" of the image with masks, and to correct
for hue, saturation and lightness.

Inspired by the existing L*a*b* grid (in turn taken from darktable)
2018-10-25 16:46:11 +02:00
..
2018-08-28 23:45:48 +02:00
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