电视摄像机主要参数测试系统设计与实施

Design and Implementation of a Testing System for TV Camera Main Illumination Parameters

在监控和军事等领域应用中,对电视摄像机的主要光电参数的准确标定是非常重要的。本文介绍了一种基于视频信号处理的电视摄像机主要光电参数综合检测装置的设计和实施方案。采用特定的测试目标对摄像机成像,视频图像被高精度数字图像采集卡捕获并将数据传送给计算机,再通过数字图像处理软件自动计算,可实现CCD响应度、灵敏度、信噪比、动态范围和电视分辨力、畸变、对比度等参数的准确测试。

In some fields such as scout and military affairs,TV camera main illumination parameters must be calibrated in order to acquire accurate results. This paper presents the design and implementation scheme of an integrative testing system for main illumination parameters of TV cameras based on video signals processing. Special testing targets were used for video imaging. The image sequences output of the camera are captured using a high accuracy frame grabber and the extracted data are stored in a computer. After the measurement,the TV camera main illumination parameters,such as liner response,dark illumination,SNR,dynamic range and TV resolution,distortion,and contrast are extracted and automatically calculated by means of the digital video image processing program.