Measurement of minimum resolvable contrast based on human visual property

摘要：

In order to evaluate the imaging quality of a visible imaging system by measuring the minimum resolvable contrast (MRC), a novel MRC measurement method is proposed to judge the test patterns at different spatial frequencies and contrasts so that the right pattern can be identified using a computer instead of human eyes. A MRC measurement system with two integrating spheres is therefore developed. The two integrating spheres can be used to illuminate either side of the target and the contrasts of patterns on the target can be changed by controlling the special attenuators near the entrances of the two integrating spheres. During the judgment human visual properties to the luminance and frequency are considered, the computer can therefore simulate human eyes better. Experimental results indicate that the errors of measuring the luminance can be controlled within 0.3cd/m2, which offers a guaranteed precision for the measurement of MRC. The MRC values at all the frequencies are less than those by observers. The measurement of MRC is not influenced by human subjective factors. This method can be used to measure the MRC of a visible imaging system more accurately and helps to realize the automatic measurement of MRC.

关键词： minimum resolvable contrast human visual property imaging quality visible imaging system

作者: Yuan Zhang Jingmin Dai Wenjuan Li

作者单位: Mechanical Power Engineering College, Harbin University of Science & Technology, Harbin,China 150080 School of Electrical Engineering & Automation, Harbin Institute of Technology, Harbin, China150001 Electrical & Electronic Engineering College, Harbin University of Science & Technology, Harbin, Chin

会议类型: 国际会议

会议名称: 第五届仪器科学与技术国际学术会议(ISIST 2008)Fifth International Symposium on Instrmentation Science and Technology

会议地点: 沈阳

会议语种:英文

页码: 1-7

在线出版日期: 2008-09-15（万方平台首次上网日期，不代表论文的发表时间）