Help! What's matter with my raster data?

[Horky Chen]

> Horky Chen wrote:
> > Dear all,
> >    I write one filter to package the raster data to our format. I use the CMYK color space, and color order is Chunked. When print one cyan color image,but the result I get via cupsRasterReadPixels cannot match the source data. For example, the color of my image is:
> >   C:0   M:79  Y:0  K:0, but I get from the Raster data, it be:
> >   C:34  M:67  Y:0  K:0!  That's why? Why I cannot get the real image data from CUPS Raster data?
>
> It is impossible to help you without more information.
>
> What operating system?
>
> What version of CUPS?
>
> What program are you using to produce the raster data used by your
> filter?
>
> --
> ______________________________________________________________________
> Michael Sweet, Easy Software Products           mike at easysw dot com
> Internet Printing and Document Software          http://www.easysw.com

Dear Michael,

Thanks for your quickly reply!

I wrote the filter in Mac OS 10.4.7 and default CUPS enviroment. The source image is a TIFF file with Utagged CMYK profile and I print it with Photoshop 7.0. I have turned off the color management in Color Setting.

How to get the real raster data?

Thanks again!