Yen S C, Finkel L H
Department of Bioengineering, University of Pennsylvania, Philadelphia 19104, USA.
Vision Res. 1998 Mar;38(5):719-41. doi: 10.1016/s0042-6989(97)00197-1.
We present a cortical-based model for computing the perceptual salience of contours embedded in noisy images. It has been suggested that horizontal intra-cortical connections in primary visual cortex may modulate contrast detection thresholds and pre-attentive "pop-out". In our model, horizontal connections mediate context-dependent facilitatory and inhibitory interactions among oriented cells. Strongly facilitated cells undergo temporal synchronization; and perceptual salience is determined by the level of synchronized activity. The model accounts for a range of reported psychophysical and physiological effects of contour salience. In particular, the model proposes that intrinsic properties of synchronization account for the increased salience of smooth, closed contours. Application of the model to real images is demonstrated.
我们提出了一种基于皮层的模型，用于计算嵌入在噪声图像中的轮廓的感知显著性。有人提出，初级视觉皮层中的水平皮质内连接可能会调节对比度检测阈值和前注意“突出”。在我们的模型中，水平连接介导了定向细胞之间依赖于上下文的促进和抑制相互作用。受到强烈促进的细胞会发生时间同步；感知显著性由同步活动的水平决定。该模型解释了一系列已报道的轮廓显著性的心理物理学和生理学效应。特别是，该模型提出同步的内在属性解释了平滑、闭合轮廓显著性的增加。文中展示了该模型在真实图像上的应用。
