When I export an artwork as jpeg, the color in the preview window is different from my workspace.
When I open the exported jpeg with Windows Picture and Fax Viewer, it display the color different from both export preview and workspace.
When I export as pdf, there is no difference between the workspace display and acrobat reader display.
Any idea what is the issue?
Thanks.
Hi,
I have looked into this issue once more - unfortunately you are right, the display of CMYK images in Microsoft .NET Imaging component ( i.e. the preview image window in Export to JPEG dialog ) is not accurate on XP. The component can not display CMYK images at all and MS is doing CMYK-to-RGB conversion under the hood using some arbitrary parameters and disregarding embedded CMYK color profiles. If you try to read image colors within the JPEG preview you will get wrong results as well ( not CMYK 100 100 0 0 ). The problem has existed on XP and Vista, Windows 7 was working right from the very beginning. Microsoft has resolved this issue on Vista with their platform update which, AFAIK, is included in the .NET 4.0.. Unfortunately they never addressed this problem on XP and it is unlikely they ever will. You would have accurate preview only on Vista and Windows 7 system.
I have to stress however, that this is a preview problem, it does not affect the content of CMYK Jpeg we export in any way, it is absolutely correct. Practically it means that on XP you have to rely on the Draw or PP display, not on the preview shown in Export to JPEG dialog.
MT Studio said:However, some of them request for JPEG. In that case, if, by default, their computer is opening JPEG with Windows Picture and Fax Viewer, I'm worried that they may see the color differently from my computer as well as the printed output.
If you want your clients to see JPEGs as close to the original ( what you see ) as possible you should export RGB jpegs and make sure they are in sRGB color space and sRGB color profile is embedded. This is is not 100% accurate as some CMYK colors can not be reproduced accurately in sRGB, there will be slight color shift. Still, this is as close to the ideal you can get without asking them to color-calibrating their systems and without knowing how they view your images. To get truly identical results you would need to ensure that both you and your clients run fully calibrated systems and use color managed viewers, which is not realistic in most cases.
Gennady
David Milisock said:This has nothing to do with NET this has to do with Color Management settings and knowing how to use them.
However I agree with you that CMYK Jpegs should not be used in the first place in such scenarios.
Gennady Petrov said:David, you are either mistaken or unaware of this problem
My comment was intended only for the integrity of the export from Corel. IMO no should professional use such low end applications to view professional level work. If your end user is not a professional you need to understand their proofing needs and accommodate them.
Image files need to be viewed in Corel Photo-PAINT or Photoshop, PDF files need to be viewed in Acrobat, color managed professional applications.
I could ask my grand mother to run the 100 meter and she would she just would never win.
What we see here regularly on this forum is a user expecting an aircraft carrier to fit into a bathtub.
OK, I misunderstood you then. I agree that Picture and Fax viewer is simply not a right tool for this job. Taking into account that right tools are free and one click away to install it should not be a problem for a client as far as they are aware of the requirements.
Dear David and Gennady,
Thanks a lot for all the information and explanation.
I guess it's best to stick with pdf and educate my client on the issue.
Thanks again.