1. The spatial properties of edge detectors were measured psychophysically with the technique of subthreshold addition. Subthreshold patterns used to add to an edge were lines, sine gratings, Gaussian edges, and ramps.2. The sensitivity profile, determined from experiments on subthreshold addition of lines to an edge was an antisymmetric function, with peak sensitivity approximately ± 1·5′ from its midpoint. Its total extent was about ± 6′.3. The spatial frequency response of edge detectors was measured in experiments on subthreshold addition of sine gratings to an edge. The spatial frequency response was peaked at about 3 c/deg, and was broadly tuned in frequency. It was approximately equal to the Fourier transform of the sensitivity profile, implying linearity of edge detectors.4. The visibility of Gaussian edges and ramps could be explained largely in terms of the activation of edge detector neurones.5. The role of edge detectors in perception, in creating apparent brightness, and as an explanation of contour illusions, is discussed.
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机译：1.使用亚阈值加法技术对边缘检测器的空间特性进行了心理上的测量。用于增加边缘的亚阈值模式是直线，正弦光栅，高斯边缘和斜坡。2。通过对边缘下阈值添加线的实验确定的灵敏度曲线是一种反对称函数，其峰值灵敏度从其中点开始约为±1·5'。其总范围约为±6′.3。边缘检测器的空间频率响应是在实验中在阈值以下向边缘添加正弦光栅的情况下测量的。空间频率响应在约3 c / deg处达到峰值，并在频率上进行了广泛调谐。它大约等于灵敏度分布的傅立叶变换，暗示了边缘检测器的线性。4。高斯边缘和斜坡的可见性可以用边缘检测器神经元的激活来解释。5。讨论了边缘检测器在感知中的作用，产生明显的亮度以及对轮廓错觉的解释。
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