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Re:Adobe Photoshop's 'super resolution' made my jaw hit the ... by HenryBemis on Saturday March 13, 2021 @05:23PM (#26450642)
I would say that it's like pixel's RGB at address 1x1 is 0-0-0 and pixel at address 1x2 is 0-0-2 and squeezing between them a pixel with color 0-0-1 (averaging the two values near it)(assuming doing this on a image that has 1 pixel height and e.g. 2 pixes width; so that the new image would be would be:

1x1 0-0-0 (original)

1x2 0-0-1 (made up)

1x3 0-0-2 (original)

Re:Adobe Photoshop's 'super resolution' made my jaw hit the ... by webmaven on Tuesday March 16, 2021 @09:54PM (#26485595)
What you're describing is relatively straightforward (bi)linear interpolation. It is worth noting that even at this relatively simple level, going with bicubic interpolation instead will usually give you nicer results, except in cases where the hard edges in the image are only horizontal or vertical.