[magick-users] CMYK PDF read as CMY (without K channel).

[Pierre-Yves Landuré]

Hi,

well, i've just tried to display the CMYK profiles using the PHP Imagick 
API getImageProfiles, but there is none available in the PDF that I open.

And i don't understand why i should need profiles. Profiles are usefull 
for color conversion (CMYK -> RGB for example). In my case, it is the 
saved data that does not fit. Like i said earlier, the CMYK color in the 
JPEG are different from the ones in the PDF.

Since i have no color profile in the CMYK PDF, how can i add one to the 
JPEG ?

I'm a little puzzled.

Thank you for helping me.

Pierre-Yves Landuré

Anthony Thyssen a écrit :
> On Fri, 14 Nov 2008 09:42:05 +0100
> Pierre-Yves Landur__ <py.landure at dorigo.fr> wrote:
>
> | Hi,
> | 
> | ok, thank you for this commands:
> | 
> | * convert INVIT_210x100_Vide.pdf  x:
> | 
> | The image is not displayed correctly. In image informations, the PDF is 
> | seen as CMYK.
> | 
> | * convert INVIT_210x100_Vide.pdf  -colorspace RGB x:
> | 
> | The image is displayed correctly. In image informations, the PDF is seen 
> | as RGB.
> | 
> | * convert INVIT_210x100_Vide.pdf -set colorspace CMYK  -colorspace RGB x:
> | 
> | The image is displayed correctly. In image informations, the PDF has 2 
> | colorspace, The first is RGB, and there is RGB color informations. The 
> | second is CMYK, and there is no color informations.
> | 
> | Hope this help you to pin point my problem.
> | 
> Okay. it means that your input data is CMYK and IM is correctly setting
> the correct CMYK colorspace for your image
>
> So when you save to JPG all that should be needed is to have the
> appropriate CMYK profile saved with the JPG image so other things will
> understand the colorspace.
>
>
>   Anthony Thyssen ( System Programmer )    <A.Thyssen at griffith.edu.au>
>  -----------------------------------------------------------------------------
>         I'll take that bet,  you'll later regret,
>         for I'm the best that ever is!      -- Devil went to Georgia
>  -----------------------------------------------------------------------------
>      Anthony's Home is his Castle     http://www.cit.gu.edu.au/~anthony/
>