地面复杂背景下隐身目标多波段偏振检测及对制导律的影响特性分析

发布时间：2018-01-28 02:44

本文关键词： 多光谱偏振光隐身目标胡氏不变矩　出处：《南京理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：近年来,随着隐身技术的发展,特别是加装有伪装涂层的各类坦克、装甲等目标的出现,使得传统的检测手段和方法很难有效检测出目标信息。尤其是在地面类复杂背景下,如何有效提高对地面复杂背景下的隐身目标的检测能力,减小隐身目标的威胁已越来越迫切,具有非常重要的研究意义和军事应用价值。针对上述问题,论文主要研究了采用多光谱-偏振检测手段对地面复杂背景下隐身目标的检测技术和方法,主要开展了如下工作:首先介绍和分析了地面隐身目标的光谱特性和偏振特性,建立了光谱和偏振模型,接着对俯仰-偏航框架式导引头的成像原理进行了分析,在此基础上推导得到目标跟踪视线角速率与导弹制导律间的关系模型。然后,根据隐身目标的光谱特性和偏振特性设计并搭建了三通道多光谱-偏振检测平台,建立了采用三通道多光谱-偏振检测平台对隐身目标的有效检测方法,包括三通道相机的畸变校正、三通道图像的配准、三通道图像融合、融合后的图像分割以及分割后图像的目标检测方法。设计了一种改进的胡氏不变矩方法对所检测出的目标图像进行有效识别,并通过仿真实验证明了所设计方法的有效性。最后,利用所搭建的隐身目标多光谱-偏振成像检测系统,设计了实验方案和环境,通过多组实验分析了光源方位角、光源倾角、相机倾角和不同波段和偏振模式对目标与背景对比度的影响,得出了一定的实验结论。
[Abstract]:In recent years, with the development of stealth technology, especially the appearance of various types of tanks, armor and other targets with camouflage coating. Traditional detection methods and methods are difficult to detect target information effectively, especially in the complex ground background, how to effectively improve the detection ability of stealth targets in complex ground background. It is more and more urgent to reduce the threat of stealth target, which has very important research significance and military application value. This paper mainly studies the detection techniques and methods of stealth targets under complex ground background by means of multispectral polarization detection. The main work is as follows: firstly, the spectral characteristics and polarization characteristics of the ground stealth target are introduced and analyzed, and the spectral and polarization models are established. Then the imaging principle of the pitching yaw frame seeker is analyzed and the relationship between the target tracking angle of sight rate and the missile guidance law is derived. According to the spectral characteristics and polarization characteristics of stealth targets, a three-channel multi-spectral polarization detection platform is designed and built, and an effective detection method using three-channel multi-spectral polarization detection platform is established. It includes the distortion correction of the three-channel camera, the registration of the three-channel image and the fusion of the three-channel image. An improved Hu's moment invariant method is designed to effectively recognize the detected target image. The simulation results show the effectiveness of the proposed method. Finally, the experimental scheme and environment are designed using the multi-spectral polarization imaging detection system. The effects of azimuth angle of light source, dip angle of light source, camera inclination angle and different band and polarization mode on the contrast between target and background are analyzed through many experiments, and some experimental conclusions are obtained.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TJ810;TP391.41

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