[sane-devel] epson2 Epson v700 scanning at bit rate > 8 corrupts images

[Oleg Perelet]

It was endian problem between FE's (both scanimage and twain) and epson2 which shows up on PPC Mac in my case (not x86). 16bit pnm was also byte swapped.

(BTW scanimage -d test works just fine on PPC:)

For my own I flipped !defined(WORDS_BIGENDIAN) in scanimage.c to fix pnm and forced motorola=0 in stiff.c to fix tiff's.

Whoever maintains it may make nicer fix in configuration utility.

Also, I have couple more small patches for - one for high resolution dpi and another bug in lamp warm up that are specific for v700 epson2.c - who can take them? I do not use cvs, just sane user.

Thanks!
Oleg.


--- On Sat, 4/11/09, Oleg Perelet <perelet at yahoo.com> wrote:

> From: Oleg Perelet <perelet at yahoo.com>
> Subject: [sane-devel] epson2 Epson v700 scanning at bit rate > 8 corrupts images
> To: sane-devel at lists.alioth.debian.org
> Date: Saturday, April 11, 2009, 10:21 AM
> Hello, when I scan at bit rate higher than 8 I get corrupted
> images (see links bellow). It does not matter if I use color
> or grayscale. Looking at images I may guess what tiff
> scanline is packed not right, but I maybe wrong.
> 
> I can do changes and rebuild/retest backend.
> 
> Mac OS 10.4.11
> 
> Command line:
> scanimage --format tiff -d epson2 --mode Gray  --source
> "Transparency Unit" --film-type "Negative
> Film" --depth 8 > 8.tiff
> 
> (and 2 subsequent - replace 8 to 12 or 16)
> 
> http://www.perelet.com/tmp/8.tiff
> http://www.perelet.com/tmp/12.tiff
> http://www.perelet.com/tmp/16.tiff
> 
> I also placed 2 full (255) logs:
> 
> http://www.perelet.com/tmp/8.txt.gz
> http://www.perelet.com/tmp/16.txt.gz
> 
> Thanks!
> Oleg.
> 
> 
> 
> 
> 
>       
> 
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