摘要
在人类视觉生理-物理学文献中,报道了人类视觉的空间分辨率限制(不能分辨视角小于1′的两点)、时间分辨率限制(不能分辨时间间隔小于0.1″出现的两幅不同图像)和频率(波长)分辨率(不能分辨波长差小于5nm的两种颜色),但是没有对比度分辨率限制的数据报道,特别是基于现代数字技术的人类视觉对图像的对比度分辨率限制(阈值)的测定的报道。这里我们报告基于计算机数字图像处理技术的人类视觉对图像的对比度分辨率限制(阈值)的测定的现代测试方法、测试结果和数学模型。分别获得了在暗视觉和明视觉条件下的对比度分辨率限制随背景灰度而变化的函数关系。该研究结果将奠定隐身、隐形和反隐身、反隐形以及不依赖于红外技术的夜视系统的理论和技术以及相关产业的视觉生理学基础。
In the literatures on the human vision physiology and physics, there were reports about space resolution limit of 1′ visual angle, frequency resolution limit of 5nm and time resolution limit of 0.1″ of human vision. However, there has been no report about the contrast resolution limit of human vision, especially the report of measuring method and result about the contrast resolution limit of human vision based on the modem digital image processing. Here we report a modem method for measuring the contrast resolution limit of human vision based on computer digital image processing technology, and we present the measured results and their mathematical models. The function relationships of contrast resolution limit varying with background gray in a photopic or a scotopic sights were illuminated respectively. It can be expected that such investigations with regard to human vision will establish the physiological foundation of the theories and techniques in hiding bodies and hiding figures （stealth）, in anti-hiding bodies and anti-hiding figures, in the night vision system independent of infrared, as weU as in their relative industries.
出处
《生物医学工程学杂志》
EI
CAS
CSCD
北大核心
2008年第5期998-1002,共5页
Journal of Biomedical Engineering
基金
国家自然科学基金资助项目(30670536)
关键词
人类视觉
暗视觉
明视觉对比度分辨率限制
背景灰度
数学模型
Human vision Scotopic vision Photopic vision Contrast resolution limit Background grayMathematical model
