DitherKt

Filter.kt - Platform agnostic dithering filters
Dither.kt - Desktop implementation

DitherCL.jar - Jar download, usage: java -jar DitherCL.jar:

DitherCL - Help
Usage: DitherCL pathToImage filterName
Available filters:
Atkinson
2x2Bayer
3x3Bayer
4x4Bayer
8x8Bayer
5x3Bayer
Burkes
FalseFloydSteinberg
FloydSteinberg
JarvisJudiceNinke
LeftToRightErrorDiffusion
NewspaperHalftone
Random
Sierra
SierraLite
Stucki
Threshold
TwoRowSierra

Example with threshold argument (range 1 to 256): java -jar DitherCL.jar image.png 8x8Bayer 100