老年人彩度对比敏感度函数研究及滤波应用

为研究老年人彩色视觉频率响应特性，获取彩度对比敏感度与空间频率之间的函数关系，本文在LCH均匀颜色空间基础上，固定明度和色调角值，以彩度作为变量，设计人眼彩度对比敏感度实验，进行人眼视觉观察实验。获得彩度对比敏感度与空间频率的关系，并构建指数型对比敏感度函数模型。经分析表明老年人眼彩度对比敏感度随着空间频率的增加，产生先升高再缓慢降低的变化，各色调角下彩度对比度存在差异。经分析人眼对比敏感度差异与人眼视觉辨色特性有很大的相关性。并且，将构建的对比敏感度函数模型用于实现基于人眼视觉系统的滤波处理。

Study on Chroma Contrast Sensitivity Function of the Elderly and Application of Filtering

In order to study the color visual frequency response characteristics of the elderly, the functional relationship between chroma contrast sensitivity and spatial frequency was obtained. In this paper, based on LCH uniform color space, fixed brightness and hue angle values, using chroma as a variable, the chroma contrast sensitivity experiment was designed, and a large number of human visual observation experiments were conducted. The relationship between chroma contrast sensitivity and spatial frequency was obtained, and an exponential contrast sensitivity function model was constructed. The analysis showed that contrast sensitivity of the elderly increases first and then slowly decreases with the increase of spatial frequency, and there was a difference in chroma contrast between each hue angle. The difference in contrast sensitivity had a great correlation with the color discrimination characteristics of human eyes; building a specific sensitivity function model can be used to implement filtering processing based on the human visual system.