Wrong colour info for CMYK images

[Troken]

Hi again,

an odd behaviour: when using "display colour information" while viewing a CMYK image, it displays RGB values. Can it be changed so correct CMYK values are shown instead?

[xnview]

Hi again,

an odd behaviour: when using "display colour information" while viewing a CMYK image, it displays RGB values. Can it be changed so correct CMYK values are shown instead?

No sorry, the CMYK is converted in RGB space

[Trashbag97]

Will there ever be a true display of CMYK color or will it always convert to RGB?

[xnview]

Will there ever be a true display of CMYK color or will it always convert to RGB?

Always converted in RGB...

[Troken]

Maybe you should turn the "display colour information" for non-RBG images? Or state message "N/A – non-RGB image" or something.

[Clo]

Troken

• I agree, and I guess that it could be optional in the INI like :

[View]
ColorInfo= Flag
0 : Default. Works only for the current viewed image when you tick the box in the “View” menu.
1 : Works also for the previous¦next file to view.
2 : Permanent as soon as the box is ticked in the “View” menu. Saved through the sessions.
4 : (Added) Displays a warning when the image is CMYK, or any “exotic” colour mode.

KR
Claude
Clo

[ouistiti]

Troken & Clo

Very nice suggestion, I fully support !

Friendly

Paul

[Troken]

Just a note before going deepter into this

If CMYK images are handled differently, other cases should be taken into consideration – for instance Lab-colour space, PDF, AI, EPS etc. and other images that are not displayed "in their true form". To add some confusion, some AIs and PDFs can mix RGB, CMYK, greyscale and bitmap objects.

Transparency/alpha/greyscale/bitmap
I checked and Im glad that transparency/alpha and greyscale/bitmap seems to be displayed correct.

My opinion is simply that "display colour information" should only work for images that are displayed correctly, but not be available for other images.

[Clo]

—> Troken

Hello !

My opinion is simply that "display colour information" should only work for images that are displayed correctly,
but not be available for other images.

• Doing so, we'll be deprived of the rest, I mean : The coordinates that I need the most times…
- Hence, I would prefer the message, still…
• However, another flag could disable the display when the image is not correct, for instance :

…
8 :  (Added) Doesn't display “Colour Information” when the image is not RGB.

KR
Claude
Clo

[Troken]

Hi Claude.

• Doing so, we'll be deprived of the rest, I mean : The coordinates that I need the most times…

Ah, thats not good of course, I did not think of that aspect.

• However, another flag could disable the display when the image is not correct, for instance :

...

I do not know how to solve it in the programming (flags?). And with all the complexity to the subject, I can't start to think that maybe this whole issue is overkill for now, but it is just a little funny with RGB-values for a CMYK image.

Or is it so that XnView has grown so much that features like this needs a serious update/total makeover? In that case, it would probably not be necessary in the near future.

[Clo]

—> Troken

Hello !

• Here, "Flag" is not to understand as its progamming meaning, but simply as the numerical values highlited by the small pennant-bullets I like to use in the Manuals - and here also, because it's cute, isn't it ?
• In brief, just adding "4" or "8" to the chosen current existing basic value : 0 -1 - 2 could
solve all cases, and doesn't seem very hard to realize…

KR
Claude
Clo