advice on dithering?

[Michael Bach]

Dear Cappuccinorites:

I'm porting a rather sizable program from ActionScript to Cappuccino -- incomplete preview here

http://michaelbach.de/fract/FrACT10/capp/

To measure the human contrast threshold I need to present luminance differences smaller than what's possible with the usual 256 levels. Dithering is one solution.

So my question: Good suggestions for dithering?

My current plan is to use 3x3 dither matrices, make images of the 9 possible cases, and use "CGContextCreatePatternContext" and more from Aparaita's "PatternFillTest".

Any advice welcome,

best,

Michael

[daboe01]

you could render into the 2d context directly.

see e.g. <https://ipenburg.home.xs4all.nl/atkinsome>