激光与光电子学进展, 2018, 55 (12): 121103, 网络出版: 2019-08-01  

彩色偏振成像目标-背景对比度增强方法研究 下载: 1196次

Method for Target-Background Contrast Enhancement Based on Color Polarization Imaging
作者单位
西安工业大学光电工程学院, 陕西 西安 710021
摘要
为了提高光电成像系统对目标的探测识别能力,提出了一种彩色偏振成像的目标-背景对比度增强方法。基于菲涅耳原理,分析了目标偏振度随入射光波长的变化规律;采集不同偏振片旋转角度下的彩色偏振图像,从中分离出红、绿、蓝三通道下的0°、45°、90°和135°偏振图像,并分别计算各通道的偏振度图像,将红、绿、蓝三通道偏振度图像合成为新的彩色偏振图像,得到比彩色成像原图更加丰富的图像信息。搭建了彩色偏振成像实验系统,将矢量角度距离和对比度计算作为两种客观评价指标,开展了两组目标-背景的对比度观测实验。结果表明,该彩色偏振成像方法将目标与背景的矢量角度平均距离增加了0.13,对比度平均提高了0.11。
Abstract
In order to improve the detection and recognition ability of an electro-optical imaging system, a novel method for the target-background contrast enhancement based on color polarization imaging is proposed. Based on the Fresnel principle, the variation of target degree of linear polarization with wavelength of incident light is investigated. A collection of color polarization images under different rotation angles is conducted, which is separated into 0°, 45°, 90° and 135° polarization images within the red, green and blue channels. In addition, the polarization images within each channel are calculated, respectively. The red, green and blue polarization images from three channels are synthesized as a novel color polarization image, which contains richer image information than its original color image. A color polarization experimental setup is constructed. Two groups of experiments on target-background contrast enhancement are conducted, which take vector angle distance and contrast calculation as two objective evaluation indexes. The results show that this color polarization method can be used to increase the average distance of vector angle by 0.13 and the contrast calculation by 0.11.

李欣, 高明, 冯斌. 彩色偏振成像目标-背景对比度增强方法研究[J]. 激光与光电子学进展, 2018, 55(12): 121103. Xin Li, Ming Gao, Bin Feng. Method for Target-Background Contrast Enhancement Based on Color Polarization Imaging[J]. Laser & Optoelectronics Progress, 2018, 55(12): 121103.

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