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Jarvis-judice-ninke dithering #9619
Description
Feature request...
I wanted to use jarvis-judice-ninke dither but it is not in Pillow nor seems planned.
jarvis-judice-ninke is a more enhanced variant of floyd-steinberg.
while floyd- steinberg uses:
*7
351
jarvis-judice-ninke uses:
*75
35753
13531
for the diffusion matrix. this does mean it is a little slower. however, Pillow is fast enough that the speed difference may be unnoticed for typical use cases.
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Pillow 12.1.1
Python 3.13.12 (tags/v3.13.12:1cbe481, Feb 3 2026, 18:22:25) [MSC v.1944 64 bit (AMD64)]
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Python executable is C:\Users\Owner\AppData\Local\Python\pythoncore-3.13-64\pythonw.exe
System Python files loaded from C:\Users\Owner\AppData\Local\Python\pythoncore-3.13-64
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Python Pillow modules loaded from C:\Users\Owner\AppData\Local\Python\pythoncore-3.13-64\Lib\site-packages\PIL
Binary Pillow modules loaded from C:\Users\Owner\AppData\Local\Python\pythoncore-3.13-64\Lib\site-packages\PIL
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--- PIL CORE support ok, compiled for 12.1.1
--- TKINTER support ok, loaded 8.6
--- FREETYPE2 support ok, loaded 2.14.1
--- LITTLECMS2 support ok, loaded 2.17
--- WEBP support ok, loaded 1.6.0
--- AVIF support ok, loaded 1.3.0
--- JPEG support ok, compiled for libjpeg-turbo 3.1.3
--- OPENJPEG (JPEG2000) support ok, loaded 2.5.4
--- ZLIB (PNG/ZIP) support ok, loaded 1.3.1.zlib-ng, compiled for zlib-ng 2.3.2
--- LIBTIFF support ok, loaded 4.7.1
*** RAQM (Bidirectional Text) support not installed
*** LIBIMAGEQUANT (Quantization method) support not installed
*** XCB (X protocol) support not installed
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Followup:
I noticed 2 to be implemented dithering options. any timeline for those?
also, hitherdither implements all of it already but is slower than Pillow. it may be a good reference though.
Activity
[-]Please add jarvis-judice-ninke dithering[/-][+]Jarvis-judice-ninke dithering[/+]radarhere commentedon May 7, 2026
What are you referring to? #9339?
jmerc77 commentedon May 7, 2026
akx commentedon Jul 29, 2026
I've been arm-deep in the dithering code with #9829 yesterday and today -- adding Jarvis-Judice-Ninke shouldn't be too difficult.
radarhere commentedon Oct 21, 2026
#10265 has been created.
Oh, right, these two options.
Pillow/src/PIL/Image.py
Lines 171 to 172 in a6e738c
No, there are no current plans. Those options have been like that since Pillow was forked from PIL.