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Perception of High-Contrast Blurred Edges

✍ Scribed by I. Sanz; M.L. Calvo; M. Chevalier; V. Lakshminarayanan

Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
181 KB
Volume
12
Category
Article
ISSN
1047-3203

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✦ Synopsis

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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