TEXTURE INTERACTIONS DETERMINE PERCEIVED CONTRAST
TEXTURE INTERACTIONS DETERMINE PERCEIVED CONTRAST
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DOI：
10.1073/pnas.86.23.9631
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发表时间：
1989-12-01
影响因子：
11.1
通讯作者：
SOLOMON, JA
中科院分区：
文献类型：
--
作者：
CHUBB, C;SPERLING, G;SOLOMON, JA
对于一个补丁的随机视觉纹理嵌入在周围的背景相似的纹理，我们证明了感知的纹理补丁的对比度基本上取决于背景的对比度。当纹理面片被高对比度纹理包围时，纹理面片的亮点看起来更暗，同时，其暗点看起来比被均匀背景包围时更暗。当（i）纹理块和背景被滤波到不重叠的空间频带中或（ii）纹理块和背景被呈现给不同的眼睛时，引起的表观对比度的降低被极大地减小。我们的研究结果是出乎意料的所有当前的理论亮度感知和点的感知机制，对比度增益对比度增益控制发生在早期皮质或前皮质神经位点。
For a patch of random visual texture embedded in a surrounding background of similar texture, we demonstrate that the perceived contrast of the texture patch depends substantially on the contrast of the background. When the texture patch is surrounded by high-contrast texture, the bright points of the texture patch appear dimmer, and simultaneously, its dark points appear less dark than when it is surrounded by a uniform background. The induced reduction of apparent contrast is greatly diminished when (i) the texture patch and background are filtered into nonoverlapping spatial frequency bands or (ii) the texture patch and background are presented to different eyes. Our results are unanticipated by all current theories of lightness perception and point to a perceptual mechanism for contrast gain contrast gain control occurring at an early cortical or precortical neural locus.