与观察时间相关的人眼对比度敏感特性研究  

Investigation of time-relative human contrast sensitivity functions

作　　者：宋莉[1] 廖宁放[1] 董淑雯[1] 廖婷[1] 胡维贵[1] 李心怡[1] 屈亮[1] 

机构地区：[1]北京理工大学光电成像与系统教育部重点实验室,北京100081

出　　处：《光学技术》2013年第3期228-232,共5页Optical Technique

基　　金：国家自然科学基金资助项目(61078048)

摘　　要：研究了人眼在不同观察时间下的亮度对比度敏感函数。从CIE规定的颜色中心中分别选取中性灰和橙色作为图片背景,并得到不同空间频率的矩形条纹图片。根据心理物理学的极限法进行视觉评价,测得在两个背景三种典型适应观察时间下人眼的亮度对比度敏感函数。比较了中性灰和橙色背景下人眼亮度对比度敏感函数数据,并拟合得到在不同背景及对比度适应时间下的亮度对比度敏感特性曲线。结果表明,当观察时间相同时,橙色背景的亮度对比敏感函数值比中性灰背景的亮度对比度敏感函数值小;随着人眼对条纹观察时间的延长,人眼亮度对比度敏感函数的峰值及其对应的空间频率也随之增大,与背景颜色无关。The response mechanism of human luminance contrast sensitivity with different contrast adaptation time is studied. Neutral and orange are selected as the research background, rectangular stripes with different spatial frequencies are obtained. The psychophysical visual method of limits is carried out to visual investigation. Human luminance contrast sensitivity value under the adaptation time of 30ms, llSms and 469ms is obtained. Fitting curves of different adaptation time and different color centers are got by analyzing the visual data. In the same adaptation time, the luminance contrast sensitivity of orange is smaller than neutral background conditions. Time response characteristic of different background is the same. The peak of human luminance contrast sensitivity and its corresponding spatial frequency will increase as time progresses.

关 键 词：图像色貌 亮度适应 亮度对比度敏感函数 心理物理学方法 极限法 

分 类 号：O432[机械工程—光学工程]