Hello,

I tried to print several images nested together, some in sRGB some in Display P3. It seems this causes a problem with rendering 

Some colors end up being "transformed" in some kind of different unusable solid color (I attached a picture of the two prints).

When separating the prints by profile, first batch all sRGB, second batch all Display P3 the problem is completely gone.

Does anybody have the same problem - or a solution ?

Thanks a Lot,

Stephan

Hi,

thanks for the fast answer. Does the feature ICC-Override convert the color space (with what rendering intent from larger to smaller space?) or just “assign” a different profile

I often must deal with pictures from different sources with different color spaces embedded (sRGB, Adobe, P3, etc.) and don't really want to waste time on converting / editing any files before printing...

Thanks, Stephan

Qimage has absolutely no problem with printing images from different color spaces.  You can mix images with wildly varying color spaces like ProPhoto and sRGB on the same page without a problem.  It prints each image individually, converting straight from the image's color space to the printer profile so it makes no difference whether you print a mix of all from one color space and then all from another: the printing process is identical and each image is handled individually.

You have some other issue going on and seeing the problem differently in two different batches is a coincidence.  Take a look at your image that you attached here: on the one where there is a color problem on the shirt, there is fading and banding nearby that gets worse at the bottom of the print.  You have a nozzle problem: please do a nozzle check and make sure your printer is "healthy".

Regards,
Mike

No.  I don't have any other ideas.  The images would have to be corrupted in some way to produce that problem.  There is zero difference between printing all of one color space at once or a mix.  Qimage reads and prints every image as if it was the only image in the job: it has no knowledge of what printed before or after it when it is processing an image.  So it is going to do the exact same thing to every image regardless of whether each image has a different profile or the same one: read one image, get the ICC profile (color space) out of that image, convert from that color space to the printer profile.  Then proceed to the next image and do the same.

If there is corruption in the image(s), all bets are off since we don't know how they might be corrupted.  You might want to put a few samples of those iPhone shots on Google drive or provide a link so I can look at them and see if there is a corruption or incompatibility involved.  A further clue that it might be corruption are your examples you have been posting.  There isn't enough difference between sRGB and Display P3 to produce those gray areas: that is a sign of (usually profile) corruption.  If you put Display P3 on an image instead of sRGB (or vice versa) you'd be hard pressed to tell the difference.

Mike

Thanks for the image.  See attached.  On the left is the image printed by itself.  On the right it is intermixed with sRGB images.  Both look identical.

I printed twice, once with the page with just the one image on it.  Then I created a new job by mixing sRGB images on the same page.  I turned on print preview so I could capture the attached results but the actual prints are identical as well.  Not seeing any problem.

Have you tried turning on print preview and looking at the driver preview to see if that shows the problem?  That would at least rule out the printer.  The preview may not have "accurate" color but you'd definitely see a difference like the ones you've been posting.

Mike