差异模式视差检测模型与特征视差

Differential modal disparity detection model and characteristic disparity

视差检测细胞都会在某一刺激视差值处有最大响应 ,这表明细胞响应只对刺激的视差敏感 ,而与具体的刺激特征无关 .利用接受差异模式简单细胞输入的复杂细胞能量模型的响应公式 ,对特征视差的机制进行了研究 ,认为适合于视差检测的细胞类型 ,其本质是细胞具有空间频率选择特性 ;复杂细胞接受位置差编码方式的简单细胞输入时 ,具有精确的特征视差 ,而接受相位差编码方式的简单细胞输入时 。

Scientists are interested in the produced mechanism of stereoscopic vision in the world for long time past bacause people knowledge of the world surrouding us is mediated by visual senses mostly,espe- cially stereoscopic vision. Butits mechanism is not understand well. Characteristic disparity is related re- sponding outer visual stimuli that have inherent nature or relation.The differential modal disparity detec- tion model was studied to extract hidden information from senses successfully.In which the disparity de- tecting neuron's reponse is maximally evoked by varied visual stimuli,the disparity detecting neurons only respond sensitively to the special binocular disparity of stimuli,notto the figuration of the stimuli.Using the differential modal disparity detection model,the mechanisms of disparity detection were studied. The results showed thatthe model neurons are suitable fordisparity detection,and have high spatial- frequency sensitivity. When the simple cell encodes disparity by the position shift model,the fine disparity was de- tected by complex cell;the coarse disparity was detected by the phase shift model.