Re: CMYK changes with Photoshop?
Re: CMYK changes with Photoshop?
- Subject: Re: CMYK changes with Photoshop?
- From: Rolf Gierling <email@hidden>
- Date: Fri, 13 Oct 2006 12:47:12 +0200
Hello Jouni,
The JPEG compression involves converting the color values into
an other color model, YUV or YCbCr, where the compression is done.
So what you see might be rounding errors, well known as
scum dots in other colormanagement transformations.
Regards
Rolf
Am 13.10.2006 um 08:47 schrieb email@hidden:
Hello list
Has anyone run into this kind of behaviour with Photoshop CS2 (or is
this commonly known?)
Create a new untagged CMYK file and put there areas containing C100%
M100% and M100%Y100%. Save the file as jpeg - open it again and the
areas have changed to C100%M100%Y1% and M100%Y100Á%. Photoshop (or
jpeg) adds 1% of cyan or yellow to areas. Same behaviour does not
happen when saving as tiff
Jouni Marttila
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