[sane-devel] grey 4bit/pixel

m. allan noah anoah at pfeiffer.edu
Sat Aug 19 23:20:46 UTC 2006

>>   usual Linux distributions. Otherwise, write one. The PPM, PGM, PBM
>>   formats (default for scanimage output) are very simple, and it is
> None of those formats support 4-bit data.
> They do support maxlevel=15 data, but the data are represented with 8-bits.
> PBM (P4) is one bit per pixel.  If you want you could stack 4 pbm images.

gif does. i use it every day in 4 bit mode


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