Publication: Perception of high-contrast blurred edges
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2001-09
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Academic Press Inc. / Elsevier Science
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Abstract
Observer sensitivity to edge blur has been examined by experimental measurements of threshold blur as a function of contrast. An extension of previous results from Watt and Morgan for high-contrast blur edges is discussed and analyzed. We propose a psychophysical test based on a two-alternative forced choice test. The results found for three adult observers show a comparable behavior. A tendency for the blur threshold to reach an average value as contrast increases is mainly discussed. These results complement previous ones from other authors for which low- and intermediate-contrast ranges were analyzed. The observed behavior suggests a need to improve algorithms for image quality assessment, extending the actual range of contrast values to high-contrast ones.
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© 2001 Academic Press.
OSA Annual Meeting (1998. Baltimore, Maryland, EE.UU).
OSA Annual Meeting (1999. Santa Clara, California, EE.UU)
Partial results were presented at the Annual Meeting of the Optical Society of America (Baltimore, 4–9 October 1998 and Santa Clara, September, 1999). The financial assistance from the Complutense University of Madrid Multidisciplinary Project PR486/97-7477/97) is acknowledged. We are indebted to Professor Jay M. Enoch for helpful suggestions and discussions. The authors also thank an anonymous referee for a careful review.
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