4 ms·
Ask HN: What's the best way to up-scale an image?
I have a few 256 px x 256 px images. I need to enlarge them as much as possible while minimizing distortion. I'd like to turn them into a wall poster.
Do you have any advise on what to do to get the best result?
I've tried to directly enlarge them with photoshop but the details gets lost and they look terrible.
Is there a better way to do it?
- nfromb 4y ago[dead]
- WheelsAtLarge 4y agoI'll check it out. Thanks for the suggestion.
- smoldesu 4y agoWaifu2x is what the cool kids are using, YMMV though. It's a fairly generalized model that gets a lot of stuff wrong. Have at it: https://waifu2x.io/ https://waifu2x.io/
- WheelsAtLarge 4y agoImpressive! I did a x4 upsize and it did a pretty good job. Definitely better than photoshop alone. It has issues but maybe I can fix them with photoshop. Thx!
- navjack27 4y agohttps://upscale.wiki/wiki/Model_Database https://upscale.wiki/wiki/Model_Database Look at stuff here If you wanna be simple use a Mitchell filter upscale. Mitchell filtering has a minimal amount of ringing when doing an upscale. But sometimes you want ringing because that could increase the perceptual sharpness of the image... But since your end is to print this then you also need to see how upscaling the image works along with the DPI of the image file... But it really matters on the content what method you should use. It's subjective. Get tons of programs and try different things. Xnview, irfanview, Photoshop, illustrator... Read about the different filtering methods. See what other people do. See if converting the image to a vector with illustrator is a good idea... Do you have a decent GPU try different upscalers using cupscale. Or try this https://rasterbator.net/ https://rasterbator.net/
- WheelsAtLarge 4y agoGreat resource, I'm going to work my way through it.
- butz 4y agoSorry for a silly and not very technical idea: ask an artist to redraw image in higher scale?
- WheelsAtLarge 4y agoIt's a valid idea. Thx! This is what I might have do.
- dev_amiga 4y agotopaz gigapixel
- WheelsAtLarge 4y agoI'll check it out. thx...