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Enlarge a small Image for Canvas

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My Aunte wants to have a picture which is 640x427 pixels into a 11" x 14" canvas. I know I can simply enlarge this picture, but is there any way to actually increase the resolution, or doctor the image to look better? Perhaps a plugin that can make some tweaks so it isn't so grainy? Thanks

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4 minutes ago, BoltBait said:

It is impossible to get detail out of an image with no detail. Sorry.


There is machine-learning approach to this problem though. I saw something where you assign a reference image to a smaller image, and then you enlarge a image, and the result looks a bit more believable. I don't remember where I can find it, but it's somewhere in a discuss.pixls.us thread and it's about scaling.

G'MIC Filter Developer

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