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I have searched over the web but i can't find an answer. How can I adjust contrast or brightness if a trackbar's value is changed?
Posted 27-Sep-12 7:49am
Edited 27-Sep-12 7:52am
Sergey Alexandrovich Kryukov at 27-Sep-12 13:54pm
Contrast/brightness of what? OK, as bitmap manipulations are accessible directly through .NET FCL, I'll assume this is the monitor contrast/brightness.

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Solution 1

Please see this CodeProject article: Setting Screen Brightness in C#[^].
I don't understand how could you miss it if you did the search.
AfterShave at 27-Sep-12 14:18pm
I mean to adjust an image's brightness/contrast.
Sergey Alexandrovich Kryukov at 27-Sep-12 16:25pm
You should have been more accurate in posing your question. And now, you are still inaccurate, as the answer greatly depends on what you are using. It could be System.Drawing, or WPF, or something else. In all cases, it's taking the whole buffer of image data and looping through all pixels.

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