Summary: | Colors too bright with -dUseCIEColors | ||
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Product: | Ghostscript | Reporter: | Marcos H. Woehrmann <marcos.woehrmann> |
Component: | Color | Assignee: | Michael Vrhel <michael.vrhel> |
Status: | NOTIFIED FIXED | ||
Severity: | normal | ||
Priority: | P2 | ||
Version: | master | ||
Hardware: | PC | ||
OS: | All | ||
Customer: | 871 | Word Size: | --- |
Attachments: | 2b.pdf |
I will dig into this to find out what is going on. -dUseCIEColors should not really be used any longer but rather the new ICC work flow should be used which is the default case. (In reply to comment #1) > I will dig into this to find out what is going on. -dUseCIEColors should not > really be used any longer but rather the new ICC work flow should be used which > is the default case. That won't work with pdfwrite until we can write version 2 ICC profiles. We need to be able to set UseCIEColor in order to convert inappropriate device spaces when producing PDF/X or PDF/A. Although as noted yesterday on IRC this doesn't seem to be working when the input is a PDF file (for me). Though clearly it is having some effect here, and the input is PDF.... OK. Yes. The exception on -dUseCIEColor being the pdfwrite case, which Ken and I spoke about at the meeting OK. So the issue appears to be that the profile that I am generating from the default sRGB CIEABC color space defined in the postscript initialization code is not a good representation. I will dig further into this. However, for optimal color, I would still discourage using -dUseCIEColor unless as discussed above, the user is trying to do something special with the pdfwrite device. I found the issue with this. Regression testing now and fix should be committed in the next couple days. Fixed with rev 11934 |
Created attachment 6838 [details] 2b.pdf With Ghostscript 9.00 and head (r11850) the color in the attached file is rendered much lighter than with gs8.71 when -dUseCIEColors is specified. With 8.71 the image is closer The command line I'm using for testing: bin/gs -sDEVICE=ppmraw -o test.ppm -dUseCIEColor ./2b.pdf