一种精密测量CCD上像点位置的方法

介绍了一种新的 CCD技术。通过研究图像像素和 CCD像敏元之间的对应关系 ,从而可以找到图像上的点在探测器面阵上相应的精确位置。它主要涉及到视频信号同步分离技术、视频信号合成技术、脉冲宽度测量技术、计算机接口技术以及计算机程序设计技术等。首先我们要对视频信号进行分析 ,提取出行同步和场同步信号 ,在此基础上产生测量标志线脉冲 ,通过视频合成输出带有标志线的复合视频信号 ,同时我们要精确测定标志脉冲的位置 ,以数据形式提供给计算机 ,通过计算机对图像和所采集的数据的分析处理 ,最后得到表征图像像素和 CCD像敏元对应关系的水平和垂直常数 Const H、Const V。

An accurate method of detecting position of images on CCD

A new technology is introduced in this paper. Through researching of the relations between image pixels and light sensitive units of CCD, the position of CCD unit can be accurately pointed if the corresponding image pixel is given. It mainly involves these technologies: the detraction of synchronizing signal from video signal, the integration of video signal, the pulse width measurement, computer interface and software programming etc. On one hand by researching the features of video signals, the line and frame synchronizing signals are separated and a special video signal which contains flag pulses is generated. On the other hand the positions of flag pulses is also available and the data are input to computer. By computer processing of the images captured and the data acquired, the two constant values characterized the relations between the image pixels and CCD light sensitive units are finally produced.