What’s the digital process of lowering the quality of a photo or video? Also is the opposite process a thing or just movie things?

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What’s the digital process of lowering the quality of a photo or video? Also is the opposite process a thing or just movie things?

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5 Answers

Anonymous 0 Comments

Removing information from the file lowers quality, basically. Some things that can be done: switching millions of colors into thousands, blending similar pixels together, removing light beyond the visible spectrum of the eye (but that the camera still captured), compressing audio above or below the threshold of human hearing, etc. All of these tactics can vastly lower quality.

Restoring information that isn’t there anymore isn’t really possible, unless it’s saved in the file through a revision history. (See Obama’s birth certificate – it was a joke people calm down.) You might be able to smooth out some details or blow things up with a magnifying glass or guess what color something was (black and white colorization does this for old movies, for example). Regardless, you can’t read a license plate in a 240p video when the camera never captured it in the first place.

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