Siminoff R, Cavonius C R
Institut für Arbeitsphysiologie, Universität Dortmund, Germany.
Biol Cybern. 1993;69(5-6):475-84.
A series of psychophysical tests were designed to determine whether a computer simulation of the human retina could accurately predict the geometry of various stimuli that were optimally resolved for human foveal vision. Stimuli were used that were of the order of the grain of the cone mosaic, i.e., of the order of 2 x 2'. In the first set of experiments, resolution was tested using a two-bar stimulus. In one experimental series the gap between the two bars was varied, and in a second series the gap was kept constant and the width of the bars varied. In a second set of experiments, various block letters and a number of series for each letter were used; in each experimental series a single parameter was systematically varied. The same stimuli were also used as inputs for the computer simulation. When proper controls were used, the psychophysical data and computer simulation gave remarkably comparable results. Care was taken to differentiate between simple detection of a pattern, and resolution, which involved proper identification of the image.
设计了一系列心理物理学测试，以确定人类视网膜的计算机模拟是否能够准确预测各种刺激的几何形状，这些刺激对于人类中央凹视觉而言是最佳分辨的。所使用的刺激大小与视锥细胞镶嵌的颗粒大小相当，即约为2×2'。在第一组实验中，使用双条刺激测试分辨率。在一个实验系列中，改变两条线之间的间隙，在第二个系列中，间隙保持恒定，改变线条的宽度。在第二组实验中，使用了各种印刷体字母以及每个字母的多个系列；在每个实验系列中，系统地改变单个参数。相同的刺激也用作计算机模拟的输入。当使用适当的对照时，心理物理学数据和计算机模拟给出了非常可比的结果。注意区分图案的简单检测和涉及图像正确识别的分辨率。
