funkateer2 on 14 May 2018
This CNN would have to be so complex for it to be usable at all that it would be much, MUCH more efficient to simply just render a native 4K image.
I once did something similar but for audio (i.e. 'upscaling' from 8bit 8KHz to 16bit 44.1KHz using a NN), and generating 1 second of audio took ~5 minutes. And it only kind of really worked at all in a very specific domain of audio (speech); it sounded horrible for anything else. Training this NN took about 3 weeks, using a GTX1080. Just to give an idea how brute force NNs are.
