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Proceedings Paper

Perceived image quality of MPEG-2 stereoscopic sequences
Author(s): Wa James Tam; Lew B. Stelmach
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Paper Abstract

Image quality of stereoscopic video sequences were assessed by non-expert viewers, using a subjective assessment method, as described in ITU-R Recommendation 500. Three 10-second stereo sequences, in the ITU-R 601 format, were assessed. Using a standard MPEG-2 codec, images of the left-eye views of each sequence were compressed independently of the right-eye views, at bit rates of 1, 2, 3, and 6 Mb/s. Twenty-six viewers rated the overall image quality for various combinations of the compressed left- and right-eye views. Viewers also rated non- stereo sequences, which consisted of images of the right-eye views for both eyes. Ratings of overall image quality were between 60 - 70 units, corresponding to a label of 'good,' except when the severity of artifacts presented to one eye was large, i.e., when the bit rate was below 3 Mb/s. When there was a mismatch in quality of inputs to the two eyes, ratings of overall perceived quality fell halfway between ratings of quality for the left-eye input and the right-eye input. Interestingly, ratings of image quality for stereo sequences were equal to non-stereo sequences, except at the lowest bit rate tested (1 Mb/s).

Paper Details

Date Published: 3 June 1997
PDF: 6 pages
Proc. SPIE 3016, Human Vision and Electronic Imaging II, (3 June 1997); doi: 10.1117/12.274525
Show Author Affiliations
Wa James Tam, Communications Research Ctr. (Canada)
Lew B. Stelmach, Communications Research Ctr. (Canada)

Published in SPIE Proceedings Vol. 3016:
Human Vision and Electronic Imaging II
Bernice E. Rogowitz; Thrasyvoulos N. Pappas, Editor(s)

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