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Fixed bug where nonrandom dithering would only be half as effective as it should be

This commit is contained in:
Niles Rogoff 2016-07-21 11:13:04 -07:00
parent c4b2808ef4
commit e014cdbcce
1 changed files with 2 additions and 1 deletions
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3
2bit.py
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@ -75,7 +75,8 @@ for x in range(image.width):
if use_non_random_dither:
val = 255*float(counter)/counter_max # goes from 0 to 255
val *= dither # for dither = .1 and counter max = 4 it goes from 0 to 25.5
val -= 255 * dither / 2 # for those values it goes from -12.75 to 12.75
val *= 2 # 0 to +51
val -= 255 * dither # -25.5 to +25.5
val = int(val)
color[z] += val
color[z] = min(color[z], 255)