[sane-devel] Putting a scan into a tiff file

[Henning Meier-Geinitz]

Hi,

On Thu, Feb 20, 2003 at 08:03:44AM +0100, Joachim Backes wrote:
> On 19-Feb-2003 Peter Kirchgessner wrote: 
> >  Hi Joachim,
> >  
> >  thank you for the test file. You are saving the TIFF-files with a 
> >  JPEG-compression in xsane. At least xpaint is not capable of handling 
> >  JPEG-compressed TIFF-files correctly.

Huh? I just scanned an image with the ma1509 backend, saved it with
xsane 0.90 to a .tiff file and could open it with xpaint (2.6.2)
without problems. Same with the test backend. That's with default
settings (Jpeg compression). Color mode, 8 bit/color. xpaint doesn't
seem to be able to display 16 bit images.

> And: ImageMagick

Version 5.4.4.5: no problems with 8 and 16 bit modes.

> And: xv

Not installed here.

> And: ???

gimp works
qiv works

> If such a lot of tools have problems with tiff's standardly produced
> by xsane, than the defaults of xsane should be changed to the solution
> you are outlining below.

Maybe the bug occurs only sometimes and I had luck? However I have
never noticed any problems.

Maybe it's a problem with libtiff?
hmg@hmg1:~$ ldd /usr/local/bin/xsane 
	    libtiff.so.3 => /usr/lib/libtiff.so.3 (0x40359000)
	    
> But: 1. I did not find any control in the xsane preferences menu
>         for changing this tiff compression mode.

Preferences->setup-Image TIFF 16 bit/8bit image compression

Bye,
  Henning