Perception of high-contrast blurred edges
Perception of high-contrast blurred edges
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DOI：
10.1006/jvci.2001.0473
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发表时间：
2001-09-01
影响因子：
2.6
通讯作者：
Lakshminarayanan, V
中科院分区：
文献类型：
--
作者：
Sanz, I;Calvo, ML;Lakshminarayanan, V
观察者对边缘模糊的敏感性已经通过实验测量阈值模糊作为对比度的函数进行了研究。瓦特和摩根以前的高对比度模糊边缘的结果的扩展进行了讨论和分析。我们提出了一个心理物理测试的基础上，两个选择强迫选择测试。三个成年观察者的结果显示了类似的行为。主要讨论了模糊阈值随着对比度的增加而达到平均值的趋势。这些结果补充了其他作者先前的结果，其中分析了低对比度和中等对比度范围。观察到的行为表明，需要改进图像质量评估算法，将对比度值的实际范围扩展到高对比度值。(C)北京：科学出版社.
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. (C) 2001 Academic Press.