IR_HL Posted February 21, 2021 Share Posted February 21, 2021 Hi Can someone explain please exactly what the "Convert image colour spaces" option in the PDF export options actually does? The help file says "when checked, all placed images will convert to the colour space chosen on export (as set in the Profile option above). When unchecked, the colour space of the imported placed image is honoured." I interpret that to mean if I have a load of images with different profiles in my document, if that option is ticked they will all get converted to the output profile when exported to PDF. If the option is unticked they will not get converted and remain with their original profiles. The results do not reflect that in Windows (v1.9.0.932). Tested in a document which is CMYK with a profile of FOGRA51 and then exported it as a PDF/X-3 file to the FOGRA51 profile. I have placed an image with the FOGRA52 profile. Regardless of whether the "Convert image..." (CI) option is ticked or unticked the image in my PDF retains the FOGRA52 profile, not the FOGRA51 profile that was my destination profile. What I really want to do is export a PDF/X-1a file. On Windows when I choose PDF/X-1a from the Compatibility section in the PDF export options the "Convert image colour spaces" option is greyed out, unticked. That it is greyed out makes sense as PDF/X-1a everything must be converted to the destination profile. That gives a PDF where the image is converted to the output profile. Which is good. However when I try the same on the Mac (trial version 1.9.0) when I select PDF/X-1a from the Compatibility section in the PDF export options the "Convert image colour spaces" option is greyed out again, but ticked. When the PDF is made the results seem the same as the Windows PDF which once again makes me wonder exactly what the "Convert image colour spaces" option in the PDF export options actually does! Can anyone advise on my problem? I assume the different behaviour between Windows and Mac is a bug which will be ironed out. Many thanks, Iain Quote Link to comment Share on other sites More sharing options...
Old Bruce Posted February 21, 2021 Share Posted February 21, 2021 Colour Spaces are not Profiles. Colour space is CMYK or RGB etc. The profile parts of the colour spaces are ignored. Quote Mac Pro (Late 2013) Mac OS 12.7.6 Affinity Designer 2.5.5 | Affinity Photo 2.5.5 | Affinity Publisher 2.5.5 | Beta versions as they appear. I have never mastered color management, period, so I cannot help with that. Link to comment Share on other sites More sharing options...
lacerto Posted February 21, 2021 Share Posted February 21, 2021 (...) Quote Link to comment Share on other sites More sharing options...
IR_HL Posted February 22, 2021 Author Share Posted February 22, 2021 Old Bruce - you're quite right. A distinction I was overlooking. Thanks Lagarto - Thanks for your detailed explanation. The fact that it shows differently on Mac/PC when using PDF/X-1a was throwing me, but what you say makes sense. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.