Differential Contrast Based Adaptive Quantization for Perceptual Quality Optimization in Image Coding
Jingning Han, Cheng Chen, Frank Galligan, Pascal Massimino, Paul Wilkin, Wan-Teh Chang, Yannis Guyon, Yaowu Xu, James Bankoski · 2022 IEEE International Conference on Image Processing (ICIP) · 2022
We consider the perceptual quality optimization in image coding through adaptive quantization. A differential contrast model is proposed to measure the visual sensitivity to the quantization distortions, and thereby deriving the spatially adaptive quantization strategy. A complementary quantitative approach is provided as a means to efficiently calculate the proposed differential contrast model. The resulting visual quality improvement is experimentally demonstrated.