基于余弦相似度的光学伪装效能评估分析  

Evaluation and analysis of optical camouflage efficiency based on cosine similarity

作　　者：赵保贵 赵德辉[1] 董宗戈 周勋 ZHAO Baogui;ZHAO Dehui;DONG Zongge;ZHOU Xun(Department of Airport Construction Engineering, College of Aeronautical Engineering, Air Force Engineering University, Xi’an 710038, China;Work Bureau Directly of Air Force Equipment Division, Beijing 100843, China;Office of Engineering Agent of Air Force Logistics Department, Beijing 100843, China)

机构地区：[1]空军工程大学航空工程学院机场建筑工程教研室,西安710038 [2]空军装备部直属工作局,北京100843 [3]空军后勤部工程代建办公室,北京100843

出　　处：《激光技术》2022年第2期260-266,共7页Laser Technology

摘　　要：为了解决伪装效能评估手段单一、量化分析手段不足的问题,引入了余弦相似度原理开展模拟评估,对可见光伪装效能评估理论分析进行了优化。基于颜色光学数据特征,利用颜色直方图展现了目标与背景颜色频率分布,研究了样本目标与背景的颜色融合差异性;采用亮度空间分布图展现了亮度空间特征,探索了样本目标与背景的亮度差异性;并对目标和背景图像的像素数据进行采集和计算,量化研究了目标和背景的融合效果;以典型验证实例为依托,正反对比分析验证了评估方法的正确性。结果表明,用文中的评估方法对图像进行计算评估,目标与背景的图像特征向量之间的夹角余弦值达到了0.9982;正反对比得到目标与背景之间的余弦相似度0.9821和0.7324的融合效果。定性分析与定量计算表明余弦相似度理论能为伪装效能判定提供相关的算法支撑,具有一定的实用价值和使用价值。In order to solve the problems of single camouflage effectiveness evaluation method and insufficient quantitative analysis method,the cosine similarity principle was introduced to carry out simulation evaluation,and the theoretical analysis of visible light camouflage effectiveness evaluation was optimized.Based on the characteristics of color optical data,color histogram was used to show the color frequency distribution of target and background,and the difference of color fusion between sample target and background was studied.The luminance spatial characteristics were shown by luminance spatial distribution map,the luminance difference between the sample target and the background was explored.By collecting and calculating the pixel data of the target and the background image,the fusion effect of the target and the background was quantified.Based on the typical verification example,the correctness of the evaluation method was verified through the positive and negative comparative analysis.The results show that the cosine of the included angle between the image feature vector of the target and the background is 0.9982,and the fusion effect of the cosine similarity between the target and the background is respectively 0.9821 and 0.7324 by positive and negative comparison.Qualitative analysis and quantitative calculation show that cosine similarity theory can provide relevant algorithm support for camouflage effectiveness judgment and has certain practical value and application value.

关 键 词：图像处理 伪装效能 余弦相似度 颜色直方图 图像亮度 

分 类 号：TN911.73[电子电信—通信与信息系统]