• Zhifang Wang, Yuhong Liu, Ying Wang, Hong Li, Zhangyong Li, Zhiqiang Zhao, and Zhengxiang Xie.
• Department of Biomedical Engineering, Chongqing Medical University, Chongqing 400016, China.
• Sheng Wu Yi Xue Gong Cheng Xue Za Zhi. 2008 Oct 1; 25 (5): 998-1002.

AbstractIn the literatures on the human vision physiology and physics, there were reports about space resolution limit of 1' visual angle, frequency resolution limit of 5 nm 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 modern digital image processing. Here we report a modern 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 well as in their relative industries.

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