Colour Shift - Extremely Strange Problem !?

Started Jun 4, 2013 | Discussions
Al93151
Contributing MemberPosts: 634
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Colour Shift - Extremely Strange Problem !?
Jun 4, 2013

Hi

I have 2 x PC with switching box - one monitor

Just calibrated monitor, very little (if any) change since last done

5 image HDR converted to JPEG - wish to print A3 ( had profiles done always)

I selected photo from large thumbnail - it looks fine

Double click on thumbnail to see full screen - photo - huge red shift

This only happens on 1 x PC !?

Can anybody PLEASE give me a clue as to what is wrong - graphics card ? Me ?!

It is fine on 2nd PC

Surely if it was the graphics card, the thumbnail would look bad too? ...................

Thanks for any welcome help

Al

Pictus
Veteran MemberPosts: 4,680
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Re: Colour Shift - Extremely Strange Problem !?
In reply to Al93151, Jun 4, 2013

Make sure the monitor profile created is V2 and matrix and NOT V4 and LUT, also make sure the program you are using to visualize the image is FULL color managed.

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Leon Obers
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Re: Colour Shift - Extremely Strange Problem !?
In reply to Al93151, Jun 4, 2013

Both PC's has to be using the same calibrated profile for monitor.
Same settings within OS and software to all used color management related options.

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Leon Obers

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Al93151
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Re: Colour Shift - Extremely Strange Problem !?
In reply to Al93151, Jun 5, 2013

Hi

thank you both for your replies - I am struggling

Thumbnails look okay, but double click into Miscrosfot Viewer or any other way of viewing them large and the colour is way out, contrast is too high as well - they look terrible - all photos

This has only just started.

Could it be the grphics card in one of the PCs is faulty ?

There are so many settings in control panel - colour management etc. - I do not know where to start ?

Regards,

Al

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Leon Obers
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Re: Colour Shift - Extremely Strange Problem !?
In reply to Al93151, Jun 5, 2013

Several software is "color blind" as it is not "color managed".
Mistakes also can easily be made by image processing in not "converting" color spaces to another color space, but by "assign" a (wrong) specific profile.

In practice many mistakes are made by:
- Adobe RGB files looking into an sRGB space -----> giving dull and "washed out" colors.
- sRGB files looking into an Adobe RGB space -----> giving over saturated colors, specially red.

Not to speak of "Wide gamut" color spaces.

To much involved to give a simple answer. It takes some time for "study".

It has not to do with the functionality of a graphics card.
It is system, and software related by color management.

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Leon Obers

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Al93151
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Re: Colour Shift - Extremely Strange Problem !?
In reply to Leon Obers, Jun 6, 2013

Hi Leon

Thanks for taking the time to reply

I do understand this up to a point

Windows Explorer - JPEG - Large Thumbnails - look okay

Double click to almost full screen - Windows Photo Gallery - definate red & contrast shift

View same JPEG in Nikon Capture - okay

View same JPEG in QImage - okay

What is going on ??

It is as if Windows Viewer has it's own colour space ? - but of course as I can see them full screen using it,  it is what I use to decide I like (or not) before prinitng ............

Tried booting in Safe Mode - no "odd" programmes running.........

Al

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Pictus
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Re: Colour Shift - Extremely Strange Problem !?
In reply to Al93151, Jun 6, 2013

Windows viewer from XP is not color managed, from 7 is but not compatible with V4 profiles...

http://www.dpreview.com/forums/thread/3083019#forum-post-39634580

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Al93151
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Re: Colour Shift - Extremely Strange Problem !?
In reply to Al93151, Jun 7, 2013

A big thank you to you all for pointing me in th right direction

It turns out that somehow ???  the default setting for th monitor was a paper profile??

Changed it back - Hey Presto !! - Just printed 70 pics - FINE !!

Thanks again

Regards,

Al

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