Experimental Detection and Analysis of Hyperspectral Polarization Characteristics of Typical Camouflage Materials
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摘要: 针对传统检测方法无法在复杂背景下同时获取伪装材料偏振信息与光谱信息的局限性,本文利用高光谱偏振成像技术对典型伪装材料检测并分析其高光谱偏振特性。使用一套分孔径同时式高光谱偏振成像系统,对伪装涂层和伪装网等典型伪装材料进行高光谱偏振检测并解析出伪装材料的9个偏振参量,获得了伪装材料与背景的相对反射率随光谱改变的变化规律。结果表明,利用伪装材料与背景的偏振特性差异,选择合适偏振参量可以增加目标的纹理细节特征并提高其对比度;分析其光谱偏振特性,选择760 nm检测波段有利于快速准确地检测伪装材料。Abstract: In view of the limitations of traditional detection methods that can not obtain the polarization information and spectral information of camouflage materials in complex background, this paper uses hyperspectral polarization imaging technology to detect and analyze the high-spectral polarization characteristics of typical camouflage materials. In the experiment, a set of simultaneous aperture hyperspectral polarization imaging system was used to detect the hyperspectral polarization of typical camouflage materials such as camouflage coating and camouflage net, and to analyze the nine polarization parameters of the camouflage material, and obtain the relative reflectance of camouflage material and background with spectral variation. The results show that by using the difference of polarization characteristics between the camouflage material and the background, selecting the appropriate polarization parameter can increase the texture detail of the target and improve its contrast. The spectral polarization characteristics are analyzed, and the 760 nm detection band is selected to facilitate the rapid and accurate detection of the camouflage material.
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表 1 环境条件
Table 1. Environmental conditions
Detection angle Temperature Humidity Illuminance Air pressure 60° 20℃ 60% 54 klx 1000 hPa 表 2 检测距离
Table 2. Detection distance
Camouflage coating Camouflage network Distance/m 263 270 表 3 图像评价指标结果
Table 3. Image evaluation index result
I figure Q figure U figure DOLP figure AOP figure PDI figure Ex figure Ey figure Ex-Ey figure Information entropy 6.912 7.027 6.685 6.583 7.859 6.917 7.538 7.453 7.270 Standard deviation 10.21 8.742 3.787 4.310 14.22 8.857 9.902 4.945 7.167 Contrast 36.82 0.899 6.151 4.840 5.119 1.254 8.760 8.623 3.624 表 4 图像评价指标结果
Table 4. Image evaluation index result
I figure Q figure U figure DOLP figure AOP figure PDI figure Ex figure Ey figure Ex-Ey figure Information entropy 6.937 6.669 6.410 6.385 7.603 6.493 7.01 7.587 7.794 Standard deviation 8.821 5.593 3.060 3.907 19.76 3.257 6.902 9.549 8.510 Contrast 15.72 1.959 0.589 7.693 2.715 6.413 11.29 5.146 4.929 -
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