[sane-devel] Epson2 TPU and TPU2 and infrared and a patch

[Claus Boje]

Just to inform you

I cannot get scanimage to scan i infrared, it make a tiff file with error, so 
the only frontend I have had working for infrared i tiffscan 
http://code.google.com/p/tiffscan

Claus


Fredag den 9. december 2011 skrev Claus Boje:
> With a little trial and study on what vuescan can I have find some
> improvement for the epson2 driver for the epson 4990 (GX-T800) scanner and
> probably also the GT-X900 and maybe other new epson scanners, but I don't
> have any to test with.
> 
> To get the scanner scanning in infrared this patch is necessary.
> It is made against the git version of epson2-opt.c from the 12. of December
> 2011
> 
> root at claus4:/disk5/sane2/patch# diff -cB git/epson2-ops.c
> mysane/epson2-ops.c *** git/epson2-ops.c    2011-12-09 23:29:28.000000000
> +0100
> --- mysane/epson2-ops.c 2011-12-09 23:28:40.000000000 +0100
> ***************
> *** 890,895 ****
> --- 890,898 ----
>                 if (s->hw->use_extension && s->hw->TPU2)
>                         extensionCtrl = 5;
> 
> +               if (s->val[OPT_MODE].w == MODE_INFRARED)
> +                       extensionCtrl = 3;
> +
>                 /* ESC e */
>                 buf[26] = extensionCtrl;
> 
> 
> 
> 
> ...but there is a problem more.
> 
> The scanner (4990) has 2 TPU and TPU2 with a different scansize and the
> scanner can only use the TPU (not TPU2) size for infrared scan.
> 
> If the TPU2 is used for infrared scan, the image is a black and white image
> or a NACK from the scanner with the FS W d[64] command.
> 
> The right solution would bee to have 2 transparent units with the --source
> argument (flatbed | Transparent unit | Transparent unit 8"x10") witch is
> what vuescan has. I have not made any patch for that !!!!!
> 
> xsane cannot scan in infrared, it make the scanner crash (need repower to
> work again). I have used tiffscan for the tests, but scanimage should do
> it too (maybe).
> 
> Claus Boje

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