Some Color Questions

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Robert Schleif
Posts: 355
Joined: May 1st, 2009, 8:28 pm

Some Color Questions

Post by Robert Schleif »

I am trying to deepen my understanding of the use of color on computers, and my experiments have not provided clear answers to the following questions.
1. If Chrome is set for sRGB and PWP for Adobe RGB and both are displaying images at the same time, is the Chrome window displaying using sRGB and the PWP window displaying its image using Adobe RGB?
2. My monitor has display preset modes, one of which is sRGB and one is Adobe RGB. Is the monitor likely then to be applying a color transformation to whatever input signals it is receiving, or does the setting mean that the monitor will interpret the input signals that it receives as being sRGB or Adobe RGB? If the latter possibility is the case, what happens in the situation described in question 1?
tomczak
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Re: Some Color Questions

Post by tomczak »

This article may be of help in diagnosing how your browser interprets ICC tagged and untagged images:

https://gregbenzphotography.com/photogr ... b-browser/
Maciej Tomczak
Phototramp.com
jsachs
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Joined: January 22nd, 2009, 11:03 pm

Re: Some Color Questions

Post by jsachs »

It is unclear to me what effect setting Chrome to a specific profile does. It looks like this may apply only to images without an embedded profile. Assuming Chrome is properly color managed, I would expect it to do the following by default:

1) If the image it is displaying contains an embedded profile, it should use that as the image profile. If not, it should assume sRGB.

2) The image should then be converted from its internal profile to the current monitor profile as defined in the Windows Color Management control panel settings, and finally displayed.

If you change your monitor's display preset setting manually, you should also make sure you change the system color profile using the Color Management control panel (and PWP's monitor profile setting if it is not set to use the system setting) to match. This lets programs such as Chrome know what standard your monitor is calibrated to and thus what color space to convert images to before displaying them. If you use a monitor calibration device to calibrate your monitor it automatically sets the system profile for the monitor to the custom profile it creates.
Jonathan Sachs
Digital Light & Color
Robert Schleif
Posts: 355
Joined: May 1st, 2009, 8:28 pm

Re: Some Color Questions

Post by Robert Schleif »

Thank you. That is helpful.
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