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Proceedings Paper

Stereo image quality: effects of spatio-temporal resolution
Author(s): Lew B. Stelmach; Wa James Tam; Daniel V. Meegan
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Paper Abstract

We explored the response of the human visual system to mixed-resolution stereo video sequences in which one eye view was spatially or temporally low-pass filtered. It was expected that perceived quality, stereo depth, and perceived sharpness of sequences would be relatively unaffected by low-pass filtering, compared to the case where both eyes viewed a filtered image. Subjects viewed two 10-second stereo video-sequences, in which the right-eye frames were filtered vertically and horizontally (H) at 1/2H, 1/2V, 1/4H, 1/4V, 1/2H1/2V, 1/2H1/2V, 1/4H1/2V, and 1/4H1/4V resolution. Temporal filtering was implemented for a subset of these conditions at 1/2 temporal resolution, or with dropped-and-repeated frames. Subjects rates the overall quality, sharpness, and overall sensation of depth. It was found that spatial filtering produced acceptable results: the overall sensation of depth was unaffected by low-pass filtering, while ratings of quality and of sharpness were biased towards the eye with the greater spatial resolution. By comparison, temporal filtering produced unacceptable result: Field averaging and dropped-and-repeated frame conditions yielded images with poor quality and sharpness, even though perceived depth was relatively unaffected. We conclude that spatial filtering of one channel of a stereo video-stereo may be an effective means of reducing transmission bandwidth.

Paper Details

Date Published: 24 May 1999
PDF: 8 pages
Proc. SPIE 3639, Stereoscopic Displays and Virtual Reality Systems VI, (24 May 1999); doi: 10.1117/12.349366
Show Author Affiliations
Lew B. Stelmach, Communications Research Ctr. (Canada)
Wa James Tam, Communications Research Ctr. (Canada)
Daniel V. Meegan, Communications Research Ctr. (Canada)

Published in SPIE Proceedings Vol. 3639:
Stereoscopic Displays and Virtual Reality Systems VI
Mark T. Bolas; John O. Merritt; Scott S. Fisher; Mark T. Bolas; Scott S. Fisher, Editor(s)

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