Two-dimensional modeling of visual receptive fields using Gaussian subunits.
Two-dimensional modeling of visual receptive fields using Gaussian subunits.
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DOI：
10.1073/pnas.83.23.9259
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发表时间：
1986-12
影响因子：
11.1
通讯作者：
R. Soodak
中科院分区：
文献类型：
--
作者：
R. Soodak
Rodieck提出的差分高斯模型已成功地描述了视网膜神经节细胞感受野。由于视网膜感受野的基本元素由高斯函数很好地描述，因此将超过该水平的感受野建模为高斯子单元的收敛是很自然的。本文提出了计算由高斯子单元组成的模型感受野对漂移光栅响应问题的全二维解。子单元不需要是径向对称的，允许任何数量，具有任何时间相位延迟;并且预测对任何方向上任何空间频率的光栅的响应。该解决方案将大大扩展可以建模为高斯亚基收敛的感受野范围，包括具有取向和方向选择性的感受野。
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.