Peng Qiuyan, Shi Bertram E
Dept. of Electronic and Computer Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong.
Vision Res. 2010 Jan;50(2):181-92. doi: 10.1016/j.visres.2009.11.012. Epub 2009 Nov 17.
Changing disparity is a possible cue for stereomotion perception. We propose the changing disparity energy model, a physiologically plausible model for neurons tuned to changing disparity. This model combines the disparity and motion energy models commonly used to model cortical neuron outputs. The model outputs are consistent with psychophysical experiments indicating that stereomotion speed discrimination thresholds for dynamic random dot stereograms are higher than for random dot stereograms. Thus, these experimental results are not necessarily strong evidence for the existence of an inter-ocular velocity difference cue. The model also predicts a relationship between the speed discrimination threshold ratio and the dot density.
变化的视差是立体运动感知的一个可能线索。我们提出了变化的视差能量模型，这是一个生理上合理的用于调谐到变化视差的神经元的模型。该模型结合了通常用于模拟皮层神经元输出的视差和运动能量模型。模型输出与心理物理学实验一致，这些实验表明动态随机点立体图的立体运动速度辨别阈值高于随机点立体图。因此，这些实验结果不一定是存在眼间速度差异线索的有力证据。该模型还预测了速度辨别阈值比与点密度之间的关系。
