[Openicc] What is exactly needed: Embedded Profile in CUPS raster !!

Jan-Peter Homann homann at colormanagement.de
Wed Jun 1 07:46:30 PDT 2011

Hello Mike and all:
For synchronizing colormanagement in  CUPS "..toraster" and the driver, 
it would be extremely helpful, if the target profile of an ICC based 
color transformtion in CUPS "..toraster" could be embedded into the CUPS 
raster file.
This would allow e.g. rastertogutenprint to extract driver settings from 
the embedded profile to maintain, that printing is always done with the 
same setting the profile has been generated for.

My question:
How fast is it possible to extend the CUPS specifcation to allow 
embedding of an ICC in CUPS-raster format like in TIFF, JPEG or PNG ?

Best regards

Am 01.06.11 15:40, schrieb Kai-Uwe Behrmann:
> On 01.06.2011 15:22, Michael Vrhel wrote:
>> Hi Jan-Peter,
>> The embedding of the data's profile into the raster format is
>> something that should be in place by the next release of ghostscript
>> in August (9.03) .  I have an open enhancement request for this for
>> the TIFF, JPEG and PNG output devices of ghostscript.    A similar
>> thing could be done for the CUPs device, which I believe is the device
>> used for gstoraster.   However, I am not familiar with where or how
>> the data is packed into the CUPs raster.
> > From Till's comments, embedding a ICC profile into CUPS raster seems
> currently not possible. Even though I agree with Jan-Peter, that would
> have been a more clever solution.
>> My plan is to add in a new device parameter that can be set on the
>> command line to indicate if the profile should or should not be
>> embedded.   I need to decide what the default behavior should be (i.e.
>> to embed or not) .
> Tagging/embedding is a good thing. Otherwise the datas colour space is
> not defined, which will often become data loss. So generally speaking
> embedding should be the default.
> kind regards
> Kai-Uwe

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