亚像素图像处理技术及其在网格法中的应用

Subpixel Techniques and Its Application in Grid Method

图象分辨率大大低于胶片是数字图像处理系统的一大弱点，此弱点极大地限制了数字图像处理技术在精密测量等领域的应用。亚像素软件处理技术能弥补硬件这一缺点。本文介绍了常用的正像素图像处理技术，并将其应用于网格测量方法；提出了处理大曲率网格线的新方法──线跟踪算子，并实现了大曲率网格的亚像素处理。

The fault that the picture resolution of digital image system is much worse than film greatly limits the application of digital image processing techniques in mesurements. Subpixel techniques can mend this fault. In this paper, we introduce the common subpixel techniques and use them in grid mesurement. A new filter-the line search algorism is given to process the strongly curved grid line and the subpixel resultsuare obtained.