Waifu2x Caffe rewrites only the conversion function of the image conversion software "waifu2x" using Caffe and is software developed for Windows. Although it can convert with CPU, using CUDA (or cuDNN) can convert faster than CPU.

GUI supports English, Japanese, Simplified Chinese, Traditional Chinese, Korean, Turkish, Spanish, Russian, and French.

System requirements

In order to operate this software, at least the following is necessary:

  • Windows Vista 64-bit or later
  • Memory: Free memory 1 GB or more (depending on the image size to be converted)
  • GPU: Nvidia GPU with Compute Capability 3.0 or higher (not required when converting with CPU)
  • Microsoft Visual C ++ 2015 redistributable package Update 3 (x64 version) must be installed

Although you can convert with CUDA without using cuDNN, depending on the type of GPU used, you can convert images faster with it. cuDNN is a library for high-speed machine learning which can be used only with NVIDIA GPUs. Although cuDNN has such advantages, it is not possible to distribute files necessary for operation due to licensing.

So, if you want to use cuDNN please download the binary for Windows (v 5.1 RC or later) on this page and put "cudnn64_7.dll" in the folder of waifu2x-caffe. Nvidia requires you to register as a developer first.