双目微光夜视仪光学调校检测方法及系统研究

发布时间：2018-01-15 11:36

本文关键词：双目微光夜视仪光学调校检测方法及系统研究　出处：《南京理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：双目微光夜视仪是一种常用的夜间观察类仪器,由于直接佩戴于人眼,其性能缺陷会给使用者的安全与健康带来威胁。目前,用于夜视仪调校与检测的仪器一般体积庞大、功能单一,难以满足携行需要,检测结果缺乏客观性。因此,有必要对综合性、便携式的夜视仪调校及自动检测设备进行研究。本文首先分析了光轴平行度、放大率、放大率差、像倾斜及分辨率等光学参数的多种检测方法,根据夜视仪相关标准确定了所研究的调校检测设备需达到的指标,设计了设备的总体方案。在此基础上,确定了平行光管物镜、前置镜镜头、十字及分辨率分划图案、图像采集器件、照明光源及计算机的参数要求,并完成了器件的设计与选型。为了自动检测夜视仪的光轴平行度、放大率、放大率差和像倾斜,需要获取十字分划中三个十字的中心坐标。通过逐行、逐列计算目标像素数量,并统计分析求取峰值,确定了每个十字中心的范围,配合灰度重心法完成了十字中心的检测。为了自动检测分辨率,首先基于Hough变换设计了分辨率图案的定位算法,并利用形态学运算提高了定位精度。取多列垂直于图案线条方向的像素计算图案的对比度,并与阈值比较以判定图案是否可分辨。使用Visual C++编写了自动检测软件,实现了检测、保存与查询等功能,并通过软件控制电路的通断以保障夜视仪的安全。设备装调与功能验证过程中,完成了设备的视差校正及测量功能的标定。使用校正好的设备检测了微光夜视仪,并将检测结果与传统测量仪器的测量结果作了比较,结果表明,双目微光夜视仪调校检测设备调校功能可靠,检测精度满足要求。
[Abstract]:Binocular night vision instrument is a commonly used night observation instrument, because directly worn on the human eye, the performance defects will give users the safety and health threat. At present, for night vision alignment and testing instruments usually bulky, single function, difficult to meet the needs of articles for lack of objectivity. Therefore, the detection results. It is necessary to comprehensive study, portable night vision instrument calibration and automatic detection equipment. This paper first analyzes the parallelism of optical axis, magnification, difference of magnification, a variety of detection methods like optical parameters of tilt and resolution, according to the relevant standards of night vision instrument calibration equipment required to achieve the target detection determine the overall design of the equipment. On this basis, the collimator lens, lens, and resolution of cross graticule pattern, image acquisition device, light source and lighting parameters of computer Requirements, and complete the design and selection of devices. In order to automatically detect the optical axis parallelism of night vision, magnification, difference of magnification and image tilt, the coordinates of the center to obtain reticle in three cross. Through the progressive, by calculation of the target pixel number, and statistical analysis to calculate the peak, determines the scope of each cross in the center, with the gray barycenter method to complete the detection of cross center. In order to detect resolution based on Hough transform design positioning algorithm resolution pattern, and using morphological operations and improve the positioning accuracy. The pixel columns perpendicular to the direction of the pattern calculation pattern lines contrast, and compared to a threshold to determine the pattern whether can be resolved. The use of Visual C++ automatic detection software can detect, save and query functions, and through the software control circuit to ensure safety. A night vision device Preparation of alignment and functional verification process, completed the calibration equipment and measuring parallax correction function. The equipment used to detect just school night vision, and the result of measurement results with the traditional measuring instruments are compared, the results show that the binocular night vision instrument calibration test equipment calibration function reliable detection the accuracy meets the requirements.

【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

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