Title :
Modelling visual attention and motion effect for visual quality evaluation
Author :
Lu, Zhongkang ; Lin, W.S. ; Yang, X.K. ; Ong, E.P. ; Yao, Susu
Author_Institution :
Inst. for Infocomm Res., Agency for Sci. Technol. & Res., Singapore
Abstract :
The perceptual visual quality evaluation of human visual system (HVS) is very complex. It concerns almost all aspects of visual processing in the vision path, from low-level neuron activities to high-level visual perception. Existing perceptual visual quality metrics (VQMs) only considered several of the mechanisms of HVS, and many others are ignored. In this paper, two global modulatory factors, visual attention and motion suppression, are modelled and combined to form a mathematic expression - perceptual quality significant level (PQSL). To a certain extent, it is believed that PQSL values reflect the processing ability of the human brain on local visual content. To evaluate their effects on visual quality evaluation, two VQMs are proposed. One is a MSE-like VQM based in a PQSL-modulated JND profile, which was proposed in (Z. K. Lu et al, Proc. ICASSP´2004, v.3, p.705-708, 2004); the other VQM is based on Wang´s visual quality assessment (Sig. Proc.:Image Comm., v.19, n.2, p.121-132, 2004), PQSL values are used to adjust the weights of his structural similarity index. Experimental results show that introduction of the global modulatory factors can improve the performance of current visual quality metrics.
Keywords :
image processing; video signal processing; visual perception; HVS; MSE-like VQM; PQSL-modulated JND profile; Wang visual quality assessment; global modulatory factors; high-level visual perception; human brain visual processing ability; human visual system; low-level neuron activities; motion suppression; perceptual quality significant level; perceptual visual quality metrics; structural similarity index; visual attention; visual motion effects; visual quality evaluation; Distortion measurement; Humans; Image coding; Mathematical model; Mathematics; Neurons; Psychology; Video compression; Visual perception; Visual system;
Conference_Titel :
Intelligent Multimedia, Video and Speech Processing, 2004. Proceedings of 2004 International Symposium on
Print_ISBN :
0-7803-8687-6
DOI :
10.1109/ISIMP.2004.1434116