Color changes (darkens) in screen capture - color sync gamma setting?

I encountered this weird effect that the color darkens when I did a screen capture in one Mac but not the other.

In fact, it darkens more with shift-ctrl-cmd-4 (selection capture) than with shift-ctrl-cmd-3 (whole screen capture).

The knowledge base mentioned the gamma setting in http://support.apple.com/kb/ht3712 but the color darkens in the clipboard, so there is no way to change the color sync if it is not a file. I tried to re-calibrate my display using different gamma setting, but it didn't change any color.

In my other Mac, I can do a screen capture and the color is preserved as is. It is only in one Mac that did this. The color darkens so much that it practically becomes black-and-white.

Any suggestion would help. I think it has something to do with the color sync profile setting.

iMac, MacBook, PowerBook, iPad, Mac OS X (10.6.4)

Posted on Oct 23, 2010 9:08 PM

Reply
1 reply

Oct 24, 2010 7:57 AM in response to nicoladie

I found out that the darkening of the color in screen capture is caused by screenshot captured into jpeg. The darkening happens when the lines are thin, due to the averaging effect of jpeg. If the lines are thick, then the change in color is not apparent.

Now, the problem is, I can't change screen capture to capture in png. I used Tinker Tool, and deleted com.apple.screencapture.plist , nothing would change it back to capture in png.

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Color changes (darkens) in screen capture - color sync gamma setting?

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