[sane-devel] Rendering Intent for Color Management in XSANE Setup

[m. allan noah]

Unfortunately, the author of XSANE is not subscribed to this list.
Please contact him directly to discuss. If that does not work, perhaps
someone here will produce a patch to correct this issue.

allan

On Wed, Jun 30, 2010 at 1:59 PM, Stephan Maier <stephan at bwh.harvard.edu> wrote:
> Hello,
>
> I have been verifying the Color Management in XSANE.
> I found a clear discrepancy between the profiling results
> achieved with XSANE and the Argyll (www.*argyllcms*.com)
> converting routine cctiff. The Argyll profiling results
> agree perfectly with the expected values for my target image.
> I was able to reproduce the XSANE results with Argyll's cctiff
> by using the same rendering intent, i.e. perceptual, for both input
> profile (XSANE: Scanner default color ICM-profile) and output profile
> (XSANE: Working color space ICM-profile).
>
> This leads me to believe the Rendering Intent choice in XSANE setup
> applies to both in input and output profile. This approach is not correct,
> however. The rendering intent of the input profile, which corrects errors
> of the scanner, has to be set to "Absolute colorimetric", since all other
> choices perform a white point correction. XSANE lacks the option
> to set this rendering intent independently of the rendering intent
> for the output profile (typically the desired output profile intent is
> perceptual or relative colorimetric).
>
>
> Stephan Maier
>
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