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It's of course not a limitation of the SCSI buffer, this is a USB scanner (note to myself: Next time think before replying ...) There are limits in the scanner, it can only handle a certain scan size:=20 The higher the resolution, the smaller the scan can be. This does not have anything to do with the total image size, it's the size of one scan line that's the problem (or, maybe the hight of the scan, there is another limitation, again based on the resolution).=20 But again: Even though the scanner can do 1600 dpi, this does not mean that the max. resolution is useful for regular scans. These resolutions only make sense for slides or transparencies. The error message may not be the best, but it does have to do with=20 memory limitations. Karl Heinz On Mon, Sep 30, 2002 at 11:36:03PM +0200, Henning Meier-Geinitz wrote: > Hi, >=20 > On Mon, Sep 30, 2002 at 10:32:27PM +0200, Henk Abma wrote: > > I run a machine with 512mb of ram and gentoo linux, with its default > > compilation of sane. When I try to scan like this: > >=20 > > scanimage --resolution 1600 --mode color -x 180 -y 100 |cjpeg --quality= =3D85 >picture.jpg=20 > >=20 > > I get an 'out of memory' error, with no indication who goes out of > > memory. I run the computer without X, so I should have more than > > enough ram available. >=20 > The image size is 204 MB if I didn't make a mistake. However, it > doesn't look like as if any of the programs buffers the whole image. > When I try that with the test backend, I don't have any problems and > the meomory usage is low. Maybe you can try the test backend also=20 > (-d test) to find out if it's a problem with the epson backend. >=20 > I tried: >=20 > scanimage -d test --resolution 1600 --mode color -x 400 -y 400 |cjpeg > -quality 85 >picture.jpg >=20 > --quality=3D85 doesn't seem to be recognised by my version so maybe we > have different versions: >=20 > Independent JPEG Group's CJPEG, version 6b 27-Mar-1998 > Copyright (C) 1998, Thomas G. Lane >=20 > Ok, pretty old :-) >=20 > Bye, > Henning > _______________________________________________ > Sane-devel mailing list > [email protected] > http://www.mostang.com/mailman/listinfo/sane-devel --=20 Karl Heinz Kremer [email protected] PGP Key at http://www.khk.net/download/khk.asc EPSON Sane Backend: http://www.khk.net --ZGiS0Q5IWpPtfppv Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.7 (GNU/Linux) iD8DBQE9mOqlxejv3RfKrhsRAmjlAJ4qMoA4rjtvAfF1KiSEfCBP2N25dACgmDAe Q+FinApB+5lpgp1wwAO1s5k= =wrJn -----END PGP SIGNATURE----- --ZGiS0Q5IWpPtfppv--
