This is a version of WaifuXL that has been modified to run as a cog, specifically for replicate
WaifuXL is a state of the art super resolution model trained on ~1,200,000 anime style images from the Danbooru2021 dataset. You can find it online at https://waifuxl.com/. Note that while you can upscale natural (real) images, the model was only trained on anime style drawings, so dont expect to have your socks blown off.
In general, the Real-ESRGAN will outperform the models used on waifu2x by a significant margin, without the need for multiple models trained on various noise reduction levels.
I'd really suggest you check out the WaifuXL project here for more information.
You can even run the model locally in your browser!
This is mainly a project to run the model in a GPU environment. It could serve as a baseline on how to run WaifuXL locally in a GPU environment.