[Openicc] Print and monitor Color Pipeline

[Leonard Rosenthol]

On Thu, Jan 27, 2011 at 8:27 PM, Jan-Peter Homann <homann at colormanagement.de
> wrote:

> The Case of 4-3-4 (CMYK-Lab-CMYK) conversion is only critical for PDF-2-PDF
> conversions / optimization. For printing CMYK-PDF files, such conversion are
> daily business.
>
>
yes, but it's still part of the process.  If you have to repurpose from
SWOP->ISOCoated (or ECI or ....), then you need to convert...



> If the OutputIntent of the print stream PDF is not identical with the
>> ICC-profile of the current printer setting. The PDF-rendering and
>> rasterizing should be done firstly to the document colorspace and than to
>> ICC of the printer driver setting.
>>
>>
>  Nope!   You should follow the rules for PDF rasterization and color
> management as defined in ISO 32000.
>
>   If PDF/X files are proofed, all ICCbased PDF objects are converted
> through the embbeded profiles and rendering intents to the Output Intent and
> than the file is converted to the printer colorspace. That how all
> professional proofing systems are working...
>
>
That is ONLY TRUE for PDF/X-1a and PDF/X-3.  For PDF/X-4 (and -5) with the
introduction of transparency, where you can have blending color spaces that
don't match the output intent, then the process becomes (potentially) more
complex with respect to color management since you have to convert at each
blending step.


Leonard
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