simple implementation of pytorch-based gan metric.
This implementation has not been validated.
available : Inception score, FID, precision, recall, density, coverage. available : Inception score, FID, precision, recall, density, coverage.
Inception score code from https://github.com/sbarratt/inception-score-pytorch/blob/master/inception_score.py
FID code from https://github.com/mseitzer/pytorch-fid
PRDC code from https://github.com/clovaai/generative-evaluation-prdc \

test in \ +aae +catgan