It’s more than just a saturation boost and gives pictures a certain look, but how does it work and how do you do it in software?
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color grading is the art of using saturation, hue, black/white levels and other settings to make a picture “look good” in terms of color
here is one of many guides:
https://news.smugmug.com/a-complete-guide-to-color-grading-and-photography-bdbee13d3466
The way you do it in software is offer the user a number filters, which are really a collection changes to these settings.
You could try to use software to define what “look good” means, to make an auto-adjust color option. But that will get tricky.
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