Watt Roger
School of Natural Sciences, University of Stirling, Stirling FK9 4LA, UK.
Perception. 2012;41(9):1092-115. doi: 10.1068/p7308.
Marr described two versions of the primal sketch: the basic image-processing level in human vision. In line with his broader view of how one should construct explanatory theories in vision, he provided some details of the computational theory for this stage, the algorithms used, and how they might be implemented in neural systems. In this paper I consider how Marr ideas have continued over the past 30 years. In this regard, I pay particular attention to three stages: locating edges; describing edge curvature; linking local edge segments into elongated contours.
人类视觉中的基本图像处理层次。与他关于如何构建视觉解释性理论的更广泛观点一致，他提供了这个阶段的计算理论、所使用的算法以及它们如何在神经系统中实现的一些细节。在本文中，我思考马尔的观点在过去30年里是如何延续的。在这方面，我特别关注三个阶段：定位边缘；描述边缘曲率；将局部边缘段连接成长轮廓。
