Global modulatory factors in DCT-based Just-Noticeable-Distortion Estimation (TP-P8)

Author(s) : Zhongkang Lu (Institute for Infocomm research, Singapore) W. S. Lin (Institute for Infocomm research, Singapore) X. K. Yang (Institute for Infocomm research, Singapore) E. P. Ong (Institute for Infocomm research, Singapore) Susu Yao (Institute for Infocomm research, Singapore)

Abstract : Visual sensitivity is not only determined by local characteristics of visual contents (luminance, contrast orientation, spatial and temporal frequency), global modulatory factors also paly an important role. In this paper, the modulatory effects of two global factors, visual attention and motion suppression, are explored. Then, a computational model is proposed for incorporating a measure of global modulatory factors into a visual sensitivity model so that more effective noise shaping is possible in various applications. Experimental results with noise-embedded video sequences confirm that introduction of the global modulatory factors enhances the performance of DCT-based JND profile used in noise shaping.

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