参考文献：
•https://github.com/kayamin/DR-GAN
•https://www.jianshu.com/p/4ee8f9284b81
•http://cvlab.cse.msu.edu/pdfs/Tran_Yin_Liu_CVPR2017.pdf
•https://arxiv.org/abs/1809.11096
•https://juejin.im/entry/5c05e76c51882539c60cf2d5
•https://www.jiqizhixin.com/articles/2018-11-13-7
