Study on simultaneous contrast and constancy in vision by multidimensional analysis of visual properties.

视频帧缓冲系统是为精确的心理物理显示而设计的，并开发了将该系统用于这一角色的技术。该装置能够精确控制对比度、亮度、显示时间和颜色来显示二维图像。一个被广泛接受的表示颜色的系统是C.I.E.系统。基于光谱辐射的可加性混合物的匹配识别颜色系统的成功，往往掩盖了一个已知的事实，即恒定主波长的线不是恒定色调的线。需要从同时考虑的三种视锥细胞的灵敏度变化方面进一步分析视觉现象。为此，我们以消色差感觉为指标，处理了所经历的消色差感觉与光谱组成、亮度等刺激变量之间的关系问题。结果表明，消色差轨迹随刺激强度的变化表现为中长波长分量之间的线性关系和短波长波长分量之间的非线性关系。接下来，在图形-背景配置的彩色后像进行检查，以指定如何视觉系统处理颜色和形式的组合。结果表明，除了第一位点受体适应和第二位点反色适应外，还存在第三位点的适应。

The video framebuffer system was designed for precise psychophysical display, and techniques were developed to use the system in this role. This device was capable of displaying two-dimensional images with precise control of contrast, luminance, displaying timing and colors.One widely accepted system to represent colors is the C.I.E. system. The success of the system of identifying colors by matches based on additivity mixture of spectral radiations has tended to obscure the known fact that lines of constant dominant wavelength are not lines of constant hue. It is required to further analyze the visual phenomena in terms of the sensitivity changes in all three cone types to be considered simultaneously. For this purpose, we took achromatic sensation as an index, and dealed with the problem of relation between the experienced achromatic sensation and the stimulus variables of spectral composition and luminance. The results showed that the change in the achromatic locus with stimulus intensity was described in terms of a linear relation between the middle - and long-wavelength components and of a nonlinear relation between the short- and longer-wavelength components.Next, color afterimages in the figure-ground configurations were examined to specify how the visual system processes combinations of color and form. The results suggested the existence of the third adaptation site, in addition to the first-site receptor adaptation and the second-site color-opponent adaptation.