On Sat, 19 Aug 2006 14:56:58 +0200, abel deuring <[email protected]> wrote:
> Shashi Kumar M.S. wrote: >> hi, >> >> iam searching a scanner that supports at about 300 dpi and 4 bit /pixel >> grey >> scanner. i found from the scanner that most of the scanner support 8/16 >> bit >> depth in grey mode. >> >> is there any way to modify this code to support 4 bit grey scale depth >> per pixel. > > well, the source code of scanimage, xsane etc is freely available ;) > >> all suggestions are welcome > > - look for a (documented) file format that supports 4 bit images (or > define your own format ;) > - patch scanimage or another frontend so that it can write the scan > data in the format you selected. Alternatively, you can convert > existing 8 bit images, as produced by a Sane frontend, with a > converter program. I am not aware of any 4 bit image formats, but > if they exist, you might already find such a converter in the > usual Linux distributions. Otherwise, write one. The PPM, PGM, PBM > formats (default for scanimage output) are very simple, and it is > quite straightforward to read them with C, Python, Perl, Java or > whichever other programming language. > > Abel > 'XnView' should do the job. Wolfram Heider
