π Upscayl - Free and Open Source AI Image Upscaler for Linux, MacOS and Windows built with Linux-First philosophy. - GitHub - upscayl/upscayl: π Upscayl - Free and Open Source AI Image Upscaler for...
And not that everything is a competition, but in my testing the results of upscayl always look a bit better than the ones from this web based non foss upscaler.
The tool Upscayl uses, RealESRGAN, is superior to waifu2x - waifu2x is really showing its age at this point. waifu2x is good if you want an upscale that basically retains the same level of fidelity while increasing the resolution (i.e., usually it's blurry). Newer upscalers try to clean up the lines and make it look like it's an original copy.
Edit: Just for fun, here's some tests via downscaling a picture then re-upscaling it:
There are also other models available to test with beyond the stock RealESRGAN ones (I'm not sure if Upscayl can use them but they're available for CLI use). I recommend using chaiNNer - e.g. you can use a setup like this
I wanted to implement the pics into the post via
![alt text](image url)
But it was not working for the upscayl version, sorry.
I just had to copy the link that the Download original image button pointed to and remove the ?dl=1 from the end, and that gave me this URL which points to the image and can be embedded in the post.