School of Computer Science and Engineering Nanjing University of Science and Technology Nanjing 210094 China;
School of Computer Science and Engineering Nanjing University of Science and Technology Nanjing 210094 China;
School of Computer Science and Engineering Nanjing University of Science and Technology Nanjing 210094 China;
School of Computer Science and Engineering Nanyang Technology University 639798 Singapore;
Image; quality; assessment; full; reference; perceptual; gradient; similarity; multi-scale; standard; deviation; pooling;