New no-reference blocking artifacts metric based on human visual system
Ahong Wang, Gangyi Jiang, Xu Wang, Mei Yu · 2009
Block-based discrete cosine transform (BDCT) is an important tool in the image and video compression. Blocking artifacts caused by BDCT may be noticeable in the decoded image under low bit-rate conditions. Measuring blocking artifacts is of great significance in the evaluation of image and video image. To ensure reliability of the model outputs, a new no-reference blocking artifacts metric is proposed in this paper, based on human vision sensitivity by the research on a model of luminance and texture masking. Furthermore, blocking artifacts are measured with different weighting coefficient in flat regions and edge regions, respectively. Compared with Wang's blind measurement of blocking artifacts, experimental results illustrate that the proposed metric has better consistency to the visual perception, and it can reflect the image quality more effectively.