Waifu2x in particular, is one of the oldest and still one of the best AI upscalers for anime and drawings in general, and it has always heavily favored Nvidia. The most known port was not the original Waifu2x by nagadomi, but Waifu2x-caffe, which was much more feature rich, and supported CUDA and cuDNN, both Nvidia exclusive. There was an OpenCL alternative which worked on AMD, but it was only as fast as... Source: over 1 year ago

If you need to enhance the quality of an image that isn't single-coloured; use an AI such as Waifu2x Vulkan or Waifu2x Caffe. Source: almost 2 years ago

It's open source software just as many other projects on github are. Can't really help you translate, but the program is in many languages including English the author is just Japanese Https://github.com/lltcggie/waifu2x-caffe If you scroll down you'll see some English text. Source: almost 2 years ago

The settings I used for the original upscale (using waifu2x-caffe):. Source: about 2 years ago

Resolution improved to 3000x1240 using waifu2x-caffe. Source: over 2 years ago

I use the one https://optimage.app/. Source: 12 months ago

Optimage is a batch image compression/resize app that I use to standardise images sent to me by clients for their website. Source: over 1 year ago

I’ve found Optimage to work better, at least for me. Source: over 1 year ago

I have something like this myself setup to automatically optimize new screenshots using Optimage ($15), but I should be able to walk you through the steps, as everything you need is built into Mac. Source: almost 2 years ago

I personally swear by Optimage. Although its primary function is images, it also does video. It is fast and it has a very generous free offering (24 files per day). It doesn't have many options, but to me, that's a feature, not a bug. Source: almost 3 years ago