[Openicc] Wrong color output of Xerox printer - Color Management problem?

[Ann L McCarthy]

Till and All,

Such problems arise as individual components of a multi-vendor system 
change how they handle CM or attempt correct perceived deficiencies in 
the overall CM result, but do not communicate their new approaches to 
the rest of the workflow.  Because there is no standardized way to 
communicate CM decisions and actions applied from component N to N+1 in 
a workflow, CM in a multi-vendor workflow currently relies on 
assumptions rather than state information passed with the data.

The metadataTag added to the ICC profile spec (see the ICC website spec 
link for info) provides one approved mechanism that is available to use 
to communicate state change from unit N to unit N+1 in a workflow.  
Kai-Uwe is familiar with this development.

I had planned to do additional work to define metadata tag values that 
would specifically indicate the various state changes that can occur in 
a workflow, as well as the user's initial request conditions. At this 
point because I have had to resign from the ICC that work is unlikely.

On the other hand, if there is an interest in the OpenICC community to 
use the metadataTag for this kind of thing, I would be happy to share 
the spreadsheet I have been working on and discuss it with anyone 
interested.

The downside of the metadata approach is that it requires adoption by 
the various vendors to be effective.  I did have initial discussions 
with contacts at Adobe and Microsoft, with initial positive responses, 
but had not progressed to a definite action plan.

Regards,
Ann McCarthy

On 11/20/2012 6:18 AM, Gerhard Fuernkranz wrote:
>
> I also noticed color issues with the Minolta Magicolor 2300W, which 
> seem to be caused by the fact that the new ICC-color-managed gs 9.x 
> does obviously no longer support CRDs (CRDs are however a well-defined 
> PostScript functionality - i.e. the new gs is no longer fully 
> PostScript L2/L3 compliant wrt. this functionaily).
>
> Regards,
> Gerhard
>
>
> Am 20.11.2012 11:37, schrieb Till Kamppeter:
>> Hi,
>>
>> after a certain update of Ubuntu some color printers from Xerox do 
>> not print colors correctly any more, see
>>
>> https://bugs.launchpad.net/bugs/984424
>>
>> What changed during the development of Ubuntu is the color-managed 
>> rendering by Ghostscript and also the color management support in the 
>> surrounding CUPS filters.
>>
>> This can have negative effects on some color printers, due to their 
>> own way to do color management, requirement of printer-specific ICC 
>> when sending color-managed job, ...
>>
>> Can someone have a look and comment on the bug report? Please also 
>> feel free to ask the reporters of the bug for additional information, 
>> sample files, ...
>>
>> Thanks in advance.
>>
>>    Till
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