Alley in Pisa, Italy

by Lars Kotthoff

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3
votes
1answer
151 views

What does it mean to brighten an image?

Courtesy of my optometrist, I now have images of my retinas. However, the images are a bit dark. I have RGB values for each pixel. In this setting, is brightening the image equivalent to increasing ...
6
votes
2answers
2k views

How to identify photoshop-edited files

If I have saved an image in JPG format after doing some edits, is there a way to identify that it is edited with Photoshop?