Re: [Lcms-user] lcms vs. libjpeg for CIELAB ITU-Fax T.43/T.42

[Hal V. E. <hv...@as...>]

On Tuesday 23 October 2007 14:17:01 Kai-Uwe Behrmann wrote:
> Hello Lee,
>
> I've got a opposite question. Can you provide a ITU tiff file example and
> probably a sRGB conterpart to cross check?
>
> Libjpeg should be handle each 3 channel colour space equally. Provided you
> attach a colour description, best a ICC profile.
>
> kind regards
> Kai-Uwe Behrmann
> --
> developing for colour management
> www.behrmann.name + www.oyranos.org + www.cinepaint.org

I find several references on the web to a CIELab ITU/Fax profile named 
iitufax.icm but I was not able to find a copy of it.  But if it is available 
or if there are enough specifications to create one then using lcms to 
convert between the normal colorspaces that we see used for most jpeg images 
and CIELAB ITU-Fax T.43/T.42 in either direction should be almost trivial to 
implement.

Hal