Riemersma dithering

Riemersma dithering is an image dithering technique that provides a middle ground between ordered dithering and error diffusion. The result is a bit more coarse than error diffusion techniques (such as Floyd-Steinberg).

When dithering a pixel, the number of neighboring pixels affected is limited. This makes Riemersma dithering suitable for use in delta-frame encoded animation, since the resultant compressing will benefit from the low variance in consecutive frames.

References

* [http://portal.acm.org/citation.cfm?id=306490.306494 Thiadmer Riemersma, "A Balanced Dithering Technique", C/C++ User's Journal, vol. 16 issue 12, December 1998]
* [http://www.compuphase.com/riemer.htm Riemersma Dither explained at CompuPhase]