Hi,
I am guessing here, but are you using JPG images to store the CMYK
results?
If so, the problem is most likely, that there is no standard way to store
CMYK values in a JGP. Some software products store Black as 0,0,0,0,
(vanilla encoding) others as 255, 255, 255, 255 (chocolate encoding, using
8 bit).
The closest thing to a standard is using vanilla encoding if an Adobe
marker is present in the file, or chocolate otherwise. It is possible to
produce the other encoding by changing the destination encoding thus
correcting for your problem.
Regards
i.A. Dr. Friedhelm König
OneVision Software Entwicklungs GmbH & Co. KG
Servatiiplatz 7-9 – 48143 Münster
Sitz der Gesellschaft: Regensburg
Persönlich haftende Gesellschafterin:
OneVision Software Entwicklungs Verwaltungs GmbH
Dr.-Leo-Ritter-Strasse 9, 93049 Regensburg
Sitz der Gesellschaft: Regensburg
Handelsregister: HRB 8932, Amtsgericht Regensburg
Geschäftsführer: Ulrike Döhler, Manuela Kluger
"Hal V. Engel" <[EMAIL PROTECTED]>
Sent by: [EMAIL PROTECTED]
10.01.2008 01:45
To
lcms-user@lists.sourceforge.net
cc
Subject
Re: [Lcms-user] RGB to CMYK uing Delphi
On Wednesday 09 January 2008 02:14:06 Ran Rozin wrote:
> Hi,
>
> I have a beginner question.
>
> I load an RGB file and try to apply a printer CMYK profile using
> cmsDotarnsform and scanline method (I’m using Delphi).
>
> The RGB that I load is set to pf24bit and the other image (which I would
> like to show after the cmyk profile applied) is pf32bit.
>
> In the cmsCreateTransform I’m using TYPE_BGR_8 for the source and
> TYPE_Cmyk_8 for the destination.
>
> The image that I draw to the screen (after the profile) looks horrible,
so
> I know that a transformation was made but the image looks like a
negative
> of the actual source. I’m probably doing something wrong, but I can’t
find
> what? Maybe I have to use the proof function for such thing.
>
>
>
> My question is – what am I doing wrong? Do I need a specific struct to
hold
> CMYK other than the pf32bit?
>
>
>
> Thanks
>
>
>
> Ran
You don't say how you are displaying the image. I suspect that it is an
issue
with your viewer.
Hal
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