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- From: dal@midgard.Midgard.MN.ORG (Dale Schumacher)
- Newsgroups: comp.graphics
- Subject: Re: Extended dithering, any work done?
- Summary: Here's a short program to do this.
- Date: 27 Apr 89 21:13:19 GMT
- Organization: The Midgard Realm, St Paul MN
-
- In article <5237@hubcap.clemson.edu> jcocon%hazel.cs.clemson.edu@hubcap.clemson.edu writes:
- |Has any work been done on displaying 256 grey shades on a monitor with
- |greater than two grey shades (i.e. black and white + some number of greys)?
- |It seems that an extension to dither would be a good place to start. So
- |far as I know, rounding is the norm in hardware (yuck! a good dither looks
- |better than some 16 grey renderings I've seen!).
-
- This program is short, so I though I'd just post it. It uses the PXM file
- format libraries I posted earlier, but the algorithm is easily separated
- from the file format details. This program dithers to n levels of grey,
- default 2, and creates output in the range 0..255 from similar input.
-