richr@ai.etl.army.mil (Richard Rosenthal) (05/20/88)
<This package sold by weight not volume.> Does someone have software to run under Unix preferably written in C to convert RGB 24-bit images to 8-bit or 12-bit image with color lookup table using peano curve algorithm? If yes, can I get the software? -- Richard Rosenthal | ARPANET: richr@etl.arpa US Army Engineer Topographic Laboratories | UUCP: (use ARPANET) Ft. Belvoir, VA 22060-5546 | PHONE: +1 202 355 2830
bcorrie@uvicctr.UUCP (Brian Corrie) (05/20/88)
In article <93@ai.etl.army.mil> richr@ai.etl.army.mil. (Richard Rosenthal) writes: >Does someone have software to run under Unix preferably written in C >to convert RGB 24-bit images to 8-bit or 12-bit image with color >lookup table using peano curve algorithm? > >If yes, can I get the software? > >-- >Richard Rosenthal | ARPANET: richr@etl.arpa >US Army Engineer Topographic Laboratories | UUCP: (use ARPANET) >Ft. Belvoir, VA 22060-5546 | PHONE: +1 202 355 2830 This isn't a solution to your request, but a request of my own. Could someone point me to good sources of information on converting n bit images to m bit images ( m < n ). I have never heard of the peano curve algorithm. Thanks in advance,
paul@hpldola.HP.COM (Paul Bame) (05/25/88)
> bcorrie@uvicctr.UUCP (Brian Corrie) / 10:03 am May 20, 1988 / > > This isn't a solution to your request, but a request of my own. > Could someone point me to good sources of information on converting > n bit images to m bit images ( m < n ). I have never heard of the > peano curve algorithm. > I've had good luck with both ordered dithering and dithering by error propagation (sorry, can't remember the reference) - the latter having been discussed at length in this group not long ago. I've used the first method for both 8->1 and 8->4 bit conversions and the latter for 8->1 and some rudimentary color dithering (8->?). Check out dithering in the literature. If you come up dry, drop me a line. --Paul Bame hplabs!hpldola!paul