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16
votes
10answers
154k views

Adjust PDF Contrast with Adobe Reader/Acrobat?

We get PDF's from our professor to read for homework but they're often scanned documents, is there a way to adjust the contrast of the text to make it easier to read? Edit: I've got Photoshop but is ...
3
votes
6answers
80k views

How to properly adjust monitor brightness and contrast?

This days, it seems that I either go worse with my eyes or some settings with contrast and brightness have been changed. However, I have been searching now for some tutorial on how to adjust contrast ...
1
vote
1answer
788 views

ffmpeg: adaptively stretch contrast

Consider a (color) video recorded under poor conditions. Its frames' brightest pixels are well below pure white, its darkest ones well above pure black. Can each frame's contrast be stretched closer ...