You can check the details of waifu2x online
Or refer to this article https://zhuanlan.zhihu.com/p/20354280
This article will not be explained any more. Only this article is left for a rainy day
Windows version:
https://github.com/lltcggie/waifu2x-caffe
Online version:
http://waifu2x.udp.jp/index.zh-CN.html
Ps: The file size should not exceed 5MB; Maximum size of noise reducible image: 3000x3000px; Maximum size of magnifiable image: 1500x1500px
