Since this is no longer updated, I forked and updated it.

[DeadSix27]

I forked a fork of a fork of this.

See: https://github.com/DeadSix27/waifu2x-converter-cpp/

Works fine on AMD GPUs and APUs on Ubuntu 16.10 and Windows 64
I updated the OpenCV library support to 3.2 (newest at point of writing)
Added a proper build guide for windows and Ubuntu (16.10) and fixed some binary file handling.

Code also is now compiling fine on VS2015 (incl. Community version)
Pre-built binaries are also offered.

Support is appreciated, I will try doing my best to keep this at least working, (e.g for the upcoming VS2017 as well)
Open an Issue on my fork if you have any questions.

PS: If you have an nVidia GPU and would like to help me getting it to work on that as well, open an issue on my fork.