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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。
Geometric correction is the process of eliminating distortion from a graph with geometric distortion. Remote photography of containment images using a photographic total station can automatically detect cracks by means of image processing. However, due to shooting angles, containment cylinder fluctuations and camera distortion and other factors, will produce tilt, offset, distortion and other image deformation, in the post-image stitching and analysis processing, you must first geometric correction. The method of geometric correction for the image of containment is discussed. The establishment method of the surface space equation of containment, the method of calibration of photographic total station and the geometric correction method of collinear equation are briefly discussed. The feasibility of this method is verified by simulation experiments Sex.