bayer8

Adaptive Bayer8 (pattern 7): Instead of splitting the scale evenly, the levels are taken from HistBiMod.

dot8

Adaptive Dots8 (pattern 6): Instead of splitting the scale evenly, the levels are taken from HistBiMod.

dalg

• D-algorithm aka pattern 8.

bayer

• added odith (D.E. Knuth), dots8 and bayer8.

c

• c implementation

fix

• fix list index out of range

dith and quant

• added dith (Knuth D.E. dither matrix)
• added quant (based of William Bell)

using histogram for average colors

• offset adjustment: delta argument
• alignment fixed
• renamed Gray to Median
• using histogram for average colors

channels threshold

• replaced foreground by channels threshold

simplify

• reduce multiplication operations
• replacing threshold search with thresholden histogram
• gray level between thresholds