基于vieWTerra的微光夜视成像系统性能仿真技术及应用研究

发布时间：2018-01-30 20:01

本文关键词： 微光夜视成像系统性能仿真 vieWTerra MTF 图像融合　出处：《南京理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：微光夜视设备在国内外军事及民用等领域有着广泛的应用,在微光成像系统研制和装备试验的过程中,利用微光视景仿真技术来检验和评估微光成像系统的性能,具有高效、经济、安全、不受时间限制等优点。因此,本文基于vieWTerra视景仿真平台对微光夜视成像系统性能仿真技术及其相关应用进行了深入研究。首先,本文给出了微光夜视成像系统性能仿真的总体设计方案,在此方案的指导下,针对直视型和间视型两类微光夜视成像系统,研究了微光成像特性,包括夜天辐射特性、景物反射特性以及大气传输特性;建立了微光夜视系统成像效应理论模型,包括信号响应特性、空间传递特性以及噪声特性;其次,基于vieWTerra可视化视景仿真软件平台及ThinkStation P700工作站开发了微光夜视性能仿真系统,利用大气效应计算程序PcModWin验证了大气传输特性理论,给出了大气平均透过率的计算方法,并根据信号能量传递公式模拟了大气效应图像;研究了影响超二代像增强器MTF的主要因素,并在大气效应图像上添加MTF模糊效应,模拟微光夜视系统空间效应图像;为提高仿真图像的真实性,在空间效应图像上分别添加高斯噪声和泊松噪声,模拟传感器噪声效果图像,在此基础上,给出了不同设置条件下微光夜视系统的仿真效果图像及结果分析;最后,提出一种基于对比度金字塔变换及Otsu的微光与红外图像融合算法,分别对真实的微光与红外配准图像以及仿真生成的微光与红外同步图像进行了融合处理,并从主观和客观两个角度与其他几组经典算法进行了结果比较和分析,验证了所提算法与同步仿真视频源的有效性和实用性。
[Abstract]:LLL night vision equipment has been widely used in military and civil fields at home and abroad, in the development of LLL imaging system and equipment testing process. Using the LLL visual simulation technology to test and evaluate the performance of the LLL imaging system has the advantages of high efficiency, economy, security, no time limit and so on. In this paper, the performance simulation technology of LLL night vision imaging system and its related applications are deeply studied based on vieWTerra visual simulation platform. In this paper, the overall design of performance simulation of LLL night vision imaging system is presented. Under the guidance of this scheme, the characteristics of LLL imaging are studied for two kinds of LLL night vision imaging systems: direct and interviewable. It includes the radiation characteristics of the night sky, the reflection characteristics of the scene and the atmospheric transmission characteristics. A theoretical model of imaging effect of LLL night vision system is established, including signal response, spatial transmission and noise characteristics. Secondly, based on vieWTerra visual simulation software platform and ThinkStation P700 workstation, a LLL night vision simulation system is developed. The theory of atmospheric transmission characteristics is verified by using the atmospheric effect calculation program PcModWin, and the calculation method of atmospheric average transmittance is given, and the atmospheric effect image is simulated according to the signal energy transfer formula. In this paper, the main factors affecting the supersecond generation image intensifier (MTF) are studied, and the MTF blur effect is added to the atmospheric effect image to simulate the spatial effect image of the LLL night vision system. In order to improve the authenticity of the simulation image, Gao Si noise and Poisson noise were added to the spatial effect image, and the sensor noise effect image was simulated. The simulation image and result analysis of LLL night vision system under different setting conditions are given. Finally, an image fusion algorithm based on contrast pyramid transform and Otsu is proposed. The real LLL and IR registration images and the simulated LLL and IR synchronization images are fused, and the results are compared and analyzed from the subjective and objective perspectives with other groups of classical algorithms. The validity and practicability of the proposed algorithm and synchronization simulation video source are verified.
【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】：TN223;TP391.41

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