Loss of spatial phase relationships in extrafoveal vision
Loss of spatial phase relationships in extrafoveal vision
复制标题
中心凹外视力空间相位关系丧失
作者：
I. Rentschler;B. Treutwein
周边视觉中的物体不仅模糊，而且缺乏形态质量。假设视觉系统对视网膜图像进行（补丁式）傅里叶分析（参见参考文献2），有人认为周边视觉的这种缺点可能是由于无法正确编码空间相位关系3 - 5。这对于神经学研究来说是非常有趣的，因为某些视觉病理意味着感知形式的改变6,7。之前测量相位灵敏度的尝试未能区分对比中相位相关变化的检测和视觉系统中的相位编码8。我们将Julesz5的等二阶纹理范式应用于复合光栅的识别，对这些处理策略进行了分离。我们的研究结果表明，中央凹和周边视觉的能量检测特性是相似的，但是，与尺度无关，周边视觉忽略了图像组件的相对位置。
Objects in peripheral vision are not simply blurred but lack quality of form1. Assuming that the visual system performs a (patchwise) Fourier analysis of the retinal image (for review see ref. 2), it has been suggested that this disadvantage of peripheral vision may be due to the inability to encode properly spatial phase relationships3–5. This is of great interest for neurological research as certain visual pathologies imply alterations of perceived form6,7. Previous attempts at measuring phase sensitivities failed to distinguish between the detection of phase-related changes in contrast and phase coding in the visual system8. We separated these processing strategies by applying the iso-second-order texture paradigm of Julesz5 to the discrimination of compound gratings. Our results, reported here, show that the energy detection properties of both foveal and peripheral vision are comparable, however, independently of scale, peripheral vision ignores the relative position of image components.
影响因子：
56.9
作者：
POLLEN, DA;RONNER, SF
通讯作者：
RONNER, SF