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灵长类视觉系统能够非常有效地从环境中提取稳定的不变性特征,而不受各种变换与干扰的影响.这种不变性知觉的时间与动态过程为视觉理论提供了重要的约束.我们开发了一种高速发光二极管(LED)背光速视器,能够短暂呈现1 ms的视觉刺激,并以亚毫秒级精度调整刺激呈现时间.这使得我们可以通过控制视觉输入的可获取时间,估计感觉线索积累的心理物理曲线,从而研究在图形结构优势效应任务中,拓扑、射影、仿射和欧氏不变性的相对加工速度.实验结果表明拓扑不变性所需要的呈现时间最短,这与大范围首先理论的预测相一致.
Primate visual systems can extract stable invariance features from the environment very efficiently without being affected by a variety of transforms and disturbances, and the temporal and dynamic processes of invariance perception provide an important constraint on the theory of vision. Developed a high-speed light-emitting diode (LED) backlit speed finder that delivers 1 ms of visual stimulus briefly and adjusts the stimulus presentation time to sub-millisecond accuracy, allowing us to estimate the sensation by controlling the time available for visual input Clues to accumulate psychophysical curves, so as to study the relative processing speed of topological, projective, affine and Euclidean invariance in the task of structural dominant effect.The experimental results show that the topological invariance needs the shortest presentation time, The first theoretical prediction is consistent.