APPARENT CONTRAST OF A SINUSOIDAL GRATING IN THE SIMULTANEOUS PRESENCE OF PERIPHERAL GRATINGS
APPARENT CONTRAST OF A SINUSOIDAL GRATING IN THE SIMULTANEOUS PRESENCE OF PERIPHERAL GRATINGS
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DOI：
10.1016/0042-6989(85)90036-7
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发表时间：
1985-01-01
期刊：
影响因子：
1.8
通讯作者：
TAKAHASHI, S
中科院分区：
文献类型：
--
作者：
EJIMA, Y;TAKAHASHI, S
以测试对比度、两个光栅的相对相位和位置为参数，测量了同时存在周边光栅的垂直正弦光栅的表观对比度作为周边收缩的函数。当周边光栅水平邻近测试光栅时，不管相位关系如何，表观对比度在低于测试对比度的周边对比度范围内升高，但在高于测试对比度的周边对比度范围内降低。当周边光栅垂直相邻于测试光栅时，在同相条件下观察到与上述类似的趋势。在反相条件下，随着周边对比度的增加，表观对比度单调上升。这些效应可以用亮度诱导、空间叠加和空间频率选择机制之间的相互作用三个过程来解释。
Apparent contrast of a vertical sinusoidal grating in the simultaneous presence of peripheral gratings was measured as a function of peripheral contract, with test contrast, and relative phase and position of the two gratings as parameters. When the peripheral gratings were horizontally adjacent to the test grating, irrespective of the phase relation, the apparent contrast was raised in the range of peripheral contrast below the test contrast, but depressed in the range of peripheral contrast above the test contrast. When the peripheral gratings were vertically adjacent to the test grating, a similar tendency as mentioned above was observed under the in-phase condition. Under the opposite-phase condition, the apparent contrast was raised monotonically with an increase in peripheral contrast. These effects can be explained in terms of three processes of brightness induction, spatial summation and interaction between the spatial-frequency selective mechanisms.