Comment by stephencanon

If you want to play around with dithering on macOS or iOS, vImage in the Accelerate framework provides most of the algorithms discussed in the article (including Atkinson!), with performance more than adequate for most applications (and with convenient vImage utilities to fit them into a CV pixel buffer pipeline for video work). vImage also supports dithering to other bit depths, though one-bit output is what you want for that vintage look.

https://developer.apple.com/documentation/accelerate/1533024...