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10 Cards in this Set
- Front
- Back
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Contrast
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The difference in luminance between an object and the background, or between lighter and darker parts of the same object
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Acuity
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the smallest spatial detail that can be resolved
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cycle
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for a grating, a pair of consisting of one dark bar and one bright bar
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visual angle
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the angle subtended by an object at the retina
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sine wave grating
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a grating with a sinusoidal luminance profile
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aliasing
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misperception of a grating due to undersampling
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Spatial Frequency
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the number of cycles of a grating per unit of visual angle (usually specified in degrees)
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Cycles per degree
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the number of dark and bright bars per degree of visual angle
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contrast sensitivity function
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a function describing how the sensitivity contrast defined as the reciprocal of the contrast threshold depends on frequency (size) of the stimulus
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contrast threshold
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the smallest amount of contrast required to detect a pattern
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