CONTRAST THRESHOLDS OF THE HUMAN EYE
CONTRAST THRESHOLDS OF THE HUMAN EYE
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DOI：
10.1364/josa.36.000624
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发表时间：
1946-01-01
影响因子：
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通讯作者：
BLACKWELL, HR
中科院分区：
文献类型：
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作者：
BLACKWELL, HR
确定了正常人的视觉对比阈值。适用于大范围的视野亮度。观察者被要求检测一个圆形测试块的存在，该测试块被投射到适应场上。获得比现场更亮和更暗的斑块数据，有两种曝光时间值和不同尺寸的测试斑块。确定对比阈值。通过心理物理学的方法，持续刺激涉及5度的对比，每个阈值确定。结果数据汇总在表格和图表中，这些表格和图表基于大约45万份回复。
Visual contrast thresholds of the normal human observer were detd. for a wide range of field brightnesses. The observers were asked to detect the presence of a circular test patch which was projected onto the adapting field. Data were obtained for patches lighter and darker than the field, with two values of exposure time and various sizes of test patch. The contrast thresholds were detd. by the psychophysic method of constant stimuli involving 5 degrees of contrast for each threshold detn. The resulting data are summarized in tables and graphs based upon some 450,000 responses.