Francis G, Grossberg S, Mingolla E
Center for Adaptive Systems, Boston University, MA 02115.
Vision Res. 1994 Apr;34(8):1089-104. doi: 10.1016/0042-6989(94)90012-4.
An analysis of the reset of visual cortical circuits responsible for the binding or segmentation of visual features into coherent visual forms yields a model that explains properties of visual persistence. The reset mechanisms prevent massive smearing of visual percepts in response to rapidly moving images. The model simulates relationships among psychophysical data showing inverse relations of persistence to flash luminance and duration, greater persistence of illusory contours than real contours, a U-shaped temporal function for persistence of illusory contours, a reduction of persistence due to adaptation with a stimulus of like orientation, an increase of persistence with spatial separation of a masking stimulus. The model suggests that a combination of habituative, opponent, and endstopping mechanisms prevent smearing and limit persistence. Earlier work with the model has analyzed data about boundary formation, texture segregation, shape-from-shading, and figure-ground separation. Thus, several types of data support each model mechanism and new predictions are made.
对负责将视觉特征绑定或分割为连贯视觉形式的视觉皮层回路重置进行分析，得出了一个解释视觉持久性特性的模型。重置机制可防止在响应快速移动图像时视觉感知出现大量模糊。该模型模拟了心理物理学数据之间的关系，这些数据显示了持久性与闪光亮度和持续时间的反比关系、虚幻轮廓比真实轮廓具有更高的持久性、虚幻轮廓持久性的U形时间函数、因适应相同方向的刺激而导致的持久性降低、以及随着掩蔽刺激的空间分离而导致的持久性增加。该模型表明，习惯性、拮抗和终端停止机制的组合可防止模糊并限制持久性。早期对该模型的研究分析了有关边界形成、纹理分离、明暗形状和图形-背景分离的数据。因此，几种类型的数据支持每个模型机制，并做出了新的预测。
