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Proceedings Paper

Visual experiments for a subjective-based conditional-replenishment image-sequence coder incorporating texture freeze
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Paper Abstract

We report on psychovisual experiments designed to obtain subjective-based thresholds for a novel conditional-replenishment image-sequence coder. This coder attempts to avoid the replenishment of textured blocks for which no subjective change has occurred from the previous to the current frame. Typically, such blocks give rise to a large difference signal with respect to the corresponding block in the previous image, and hence are coded (replenished) in commonly used coders. We designed and conducted extensive visual experiments to study the response of the human visual system to stimuli that are relevant to the coding algorithm. Three major classes of experiments were conducted with numerous parametric variations for each, in which the observers were asked to discriminate target elements with properties that differed from those of the background: (1) Uniform targets on uniform background of different intensity. (2) Textured targets of varying standard deviation on a uniform background of the same average intensity. (3) Textured targets on a textured background with the same standard deviation, but different average intensity. We report on the results of these experiments and on the improvement in the performance of the coder, as a result of implementing these results in the encoding algorithm.

Paper Details

Date Published: 27 August 1992
PDF: 14 pages
Proc. SPIE 1666, Human Vision, Visual Processing, and Digital Display III, (27 August 1992); doi: 10.1117/12.135970
Show Author Affiliations
Thomas V. Papathomas, Rutgers Univ. (United States)
David Malah, Technion--Israel Institute of Technology (Israel)


Published in SPIE Proceedings Vol. 1666:
Human Vision, Visual Processing, and Digital Display III
Bernice E. Rogowitz, Editor(s)

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