Chunle Guo Chongyi Li Jichang Guo Chen Change Loy Junhui Hou Sam Kwong Runmin Cong Zero-Reference Deep Curve Estimation for Low-Light Image Enhancement. 1777-1786 2020 CVPR https://openaccess.thecvf.com/content_CVPR_2020/html/Guo_Zero-Reference_Deep_Curve_Estimation_for_Low-Light_Image_Enhancement_CVPR_2020_paper.html https://doi.org/10.1109/CVPR42600.2020.00185 conf/cvpr/2020 db/conf/cvpr/cvpr2020.html#GuoLGLHKC20