Falk Joensson's
Eas (Easy Application Script)

Rendering 2D Drawings:20. Color Channels Effects

DRAW'GAMMA:b 0 c 50 v 0 intensifies or reduces the contrast of the image adjust the brightness by -100≤b≤100 -100 = very dark 0 = only alter contrast 100 = very bright and the effect's contrast intensity by -100≤c≤100 100 = maximum effect contrast intensity 50 = default effect contrast intensity 0 = effect off -50 = regular contrast reduction -100 = maximum contrast reduction set v#0 to have the gamma curve visualized instead of it being applied to the image
DRAW'LOFI:l 8 reduces the color channel levels to 2≤l≤32 per channel (R/G/B) for a lo-fi effect
DRAW'MIX:r (1 1 1) g (1 1 1) b (1 1 1) mixes the red/green/blue channels using a red/green/blue source vector in the order (red green blue) for each of the three destination channels each source vector value is either 0 (channel off) or 1 (channel 100 % on) or a percentage 2..99 negative values denote an inverted channel if a channel uses only its own source, the vector can be replaced by its single value examples: only the red channel: 1 0 0 only the green channel: 0 1 0 only the blue channel: 0 0 1 (in the images below, the brightness is increased, e.g. by (0 0 80) (0 0 80) 1 for blue) greyscale (default): (1 1 1) (1 1 1) (1 1 1) only colors: (1 -50 -50) (-50 1 -50) (-50 -50 1) invert (color negative): -1 -1 -1 invert only colors: (0 1 1) (1 0 1) (1 1 0) invert black/white: (0 -1 -1) (-1 0 -1) (-1 -1 0) red/green-colorblind: (1 1 0) (1 1 0) 1
DRAW'POSTERIZE:b 0 applies an artistic poster effect whose threshold brightness level can be adjusted by -100≤b≤100
 
20. Color Channels Effects
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