Effect of contrast on detection of motion of chromatic and luminance targets: retina-relative and object-relative movement.
Effect of contrast on detection of motion of chromatic and luminance targets: retina-relative and object-relative movement.
复制标题
对比度对彩色和亮度目标运动检测的影响：视网膜相对和物体相对运动。
DOI：
10.1016/s0042-6989(99)00044-9
复制
发表时间：
1999
期刊：
影响因子：
1.8
通讯作者：
Li,X
中科院分区：
文献类型：
--
作者：
Krauskopf,J;Li,X
现在很清楚，与先前的结论相反，运动可以由纯色刺激传达。这里考虑的问题是如何机制评估运动的亮度和颜色刺激的不同。测量了振幅阈值对振荡运动感知的依赖性。目标是沿L-M等发光轴或亮度进行色度调制的Gabor斑块。当呈现单个目标时，对数阈值振幅与对数对比度的函数斜率对于色度目标约为- 0.50，对于亮度目标约为0.00。当存在参考目标时，两种类型的目标的斜率约为- 0.50。结果表明，彩色目标的运动感知是基于对目标元素相对位置变化的评估，而亮度目标的运动可能通过目标元素的相对运动或图像相对于视网膜的局部运动来表示。
It is now clear, contrary to previous conclusions, that motion may be conveyed by purely chromatic stimuli. The question considered here is how the mechanisms for assessing motion of luminance and chromatic stimuli differ. The dependence on contrast of amplitude thresholds for the perception of oscillatory motion was measured. The targets were Gabor patches modulated either chromatically along the L–M isoluminant axis or in luminance. When single targets were presented, the slope of the function relating log threshold amplitude to log contrast was approximately −0.50 for chromatic targets and 0.00 for luminance targets. When a reference target was present the slopes were approximately −0.50 for both types of target. The results imply that perception of motion of chromatic targets is based on the assessment of changes in relative position of target elements while motion of luminance targets may be signalled either by relative motion of target elements or by local motion of an image relative to the retina.