中文摘要：

几何纠正是从具有几何畸变的图形中消除变形的过程。利用摄影全站仪远程拍摄安全壳影像,通过图像处理的方法能自动化地检测裂缝。但由于拍摄角度、安全壳柱面起伏和相机畸变等因素,会产生倾斜、偏移、扭曲等图像变形,在用于后期图像拼接与分析处理前,必须先进行几何纠正。讨论针对安全壳影像的几何纠正方法,简述了安全壳表面空间方程的建立方法、摄影全站仪的标定方法和共线方程几何纠正方法的理论基础,并通过模拟实验验证了该方法的可行性。

英文摘要：

Geometric correction is the process of eliminating geometric distortion from deformation pattern.We can detect cracks on nuclear power plant containment image automatically by image processing method.The images taken via photo total station will inevitably produce tilt,offset,distortion and other distortion due to photographing angle factors,shell cylinder downs and camera distortion,etc.Before the after-image stitching and analysis,it must be geometrically corrected at first.This paper generally introduces the method of containment equation establishing and photo total station calibration,and explains theoretical basis of geometric correction method based on collinear equation.The feasibility of the method is validated by simulation experiment.