CCD图像采集过程中的实时误差校正

Real time distortion correction in the process of CCD signal acquisition

根据引入误差的设备不同,分别介绍了两种误差实时校正方法——信号采集部分的实时误差校正和输出设备的实时误差预校正的原理和实现方法. 两种误差实时校正方法具有简单、实现方便、速度快和精度高等特点,在采集原始图像的同时,既可以存储系统误差校正后的图像文件,又可以在监视屏实时显示逼真的原图像.

According to the kinds of equipments that bring the distortion, two real time correction methods respectively for—in signal acquisition and data output instruments are introduced in the paper. Using A/D Convert chip and bland and white electric automatic retrieve technique, the real time correction with regard to signal acquisition corrects the distortion produced by CCD and environment effectively. The real time correction with regard to data output corrects the distortion by use of Gamma correction technique. The math models of the two methods are simple and can be realized conveniently. The two real time correction methods correct distortion with high precision and fast speed. As the original image signals are acquired, the image documents without distortion are promptly saved, and living image are immediately displayed on the screen.