使用高斯子单元对视感受野进行二维建模。
Two-dimensional modeling of visual receptive fields using Gaussian subunits.
作者信息
Soodak R E
出版信息
Proc Natl Acad Sci U S A. 1986 Dec;83(23):9259-63. doi: 10.1073/pnas.83.23.9259.
Abstract
Retinal ganglion cell receptive fields have been successfully described using the difference of Gaussians model introduced by Rodieck. As the basic elements of retinal receptive fields are well described by the Gaussian function, it is natural to model receptive fields beyond this level as a convergence of Gaussian subunits. In this paper the full two-dimensional solution to the problem of calculating the response to drifting gratings of a model receptive field composed of Gaussian subunits is presented. The subunits are not required to be radially symmetric, any number is allowed, with any temporal phase delays; and responses are predicted to gratings of any spatial frequency at any orientation. This solution will greatly extend the range of receptive fields that can be modeled as a convergence of Gaussian subunits, including those with orientational and directional selectivities.
摘要
视网膜神经节细胞的感受野已通过罗迪耶克提出的高斯差分模型成功描述。由于视网膜感受野的基本元素可用高斯函数很好地描述，因此将该水平以上的感受野建模为高斯亚单位的汇聚是很自然的。本文给出了由高斯亚单位组成的模型感受野对漂移光栅响应计算问题的完整二维解决方案。这些亚单位不要求径向对称，数量不限，具有任意时间相位延迟；并且预测了对任何空间频率、任何方向的光栅的响应。该解决方案将极大地扩展可建模为高斯亚单位汇聚的感受野范围，包括那些具有方向和方向选择性的感受野。
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