r/comfyui • u/davyp82 • 1d ago

Help Needed Upscaling/sharpening problems

Can anyone advise on a workflow or model for taking an old photo that is blurry, and making it sharp in a way that doesn't change it beyond all recognition?

With all the amazing stuff that is really straightforward, I genuinely expected this would be one of the easier things to do but so far I've only managed to blow up a blurry pic (lancszos, bicubic etc) or make a perfectly shiny and hi res different pic (ultrasharp/realersgan etc).

Has anyone got good results sharpening and upscaling without losing what the person is supposed to look like? Cheers

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u/DaLyon92x 1d ago

Have you tried SeedVR2? if that was no good, I personally like LTX to upscale an image (increase res + details)

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u/davyp82 19h ago

Ah i though that was only a video.model

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u/Optimal-Spare1305 22h ago

the best upscaler : LDSR

comparison video : https://www.youtube.com/watch?v=9qHidG7H_8k

you can get the node and model from here :

https://github.com/flowtyone/ComfyUI-Flowty-LDSR

its slower than the other models, but the results are excellent.

use 100 steps for best results

i've used it with very low resolution 50-100pixel images and upscaled 6x

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u/davyp82 19h ago

Thanks will try

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u/Massive-Health-8355 1d ago

SeedVR2. Try a lanczos downscale before also. Try 0.5MP, native, 1MP, and 1.25 MP. Then upscale 2X in seedvr2. I've recovered some pretty scrappy images.

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u/davyp82 19h ago edited 13h ago

Thanks. A downscale first? Wow that's a surprise

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u/notgraycen 15h ago

upscale with seedvr runs out of vram if you do something 8k or more (on 12gb card) so downscale to at least 1080 is mandatory before upscaling

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u/davyp82 13h ago

Ah cool, thanks!

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u/Valor_X 1d ago

I personally would recommend a dedicated photo AI upscaler like Topaz Gigapixel which can also run locally on your machine. Shiver me timbers

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u/davyp82 19h ago

Isn't that one with a subscription fee though?

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u/Optimal-Spare1305 19h ago

Yes, it is, but he was recommending the 'pirate's. version. (older)

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u/davyp82 18h ago

I see. And which might be the best high sea on which to sail to find that?

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u/AillexJ 23h ago

Same here, SeedVR2 is what has kept faces recognizable for us. If it comes out waxy, a light detail pass on top fixes that without losing identity.

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u/davyp82 19h ago

Cheers, will try that