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Proceedings Paper

Visual masking at video scene cuts
Author(s): Wa James Tam; Lew B. Stelmach; Limin Wang; Daniel Lauzon; Peter Gray
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Paper Abstract

We examined the sensitivity of the human visual system to video coding artifacts following a scene cut. Based on classical studies of visual masking, we would expect that sensitivity to coding artifacts would be reduced immediately following a cut. This study focused on the visibility of coding artifacts introduced by an MPEG-2 codec. Three image sequences were selected, each with a scene cut in the middle, such that image content in the first half was different from that in the second half. Using psychophysical methods, visibility threshold were estimated for coding artifacts inserted in the first, second, or third frame following the scene cut. Visibility thresholds were also estimated for coding artifacts that were inserted simultaneously in the first and second frames following the cut. it was found that visual masking effects were present in the first frame following a scene cut, but were virtually absent by the second or the third frame. The results of this research may be used to optimize the behavior of video coding algorithms at scene cuts.

Paper Details

Date Published: 20 April 1995
PDF: 9 pages
Proc. SPIE 2411, Human Vision, Visual Processing, and Digital Display VI, (20 April 1995); doi: 10.1117/12.207532
Show Author Affiliations
Wa James Tam, Communications Research Ctr. (Canada)
Lew B. Stelmach, Communications Research Ctr. (Canada)
Limin Wang, Communications Research Ctr. (Canada)
Daniel Lauzon, Communications Research Ctr. (Canada)
Peter Gray, Communications Research Ctr. (Canada)

Published in SPIE Proceedings Vol. 2411:
Human Vision, Visual Processing, and Digital Display VI
Bernice E. Rogowitz; Jan P. Allebach, Editor(s)

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