一种根据曲率变化检校畸变差的方法
Lens Distortion Calibration Based on Curvature Variance
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摘要: 提出了基于曲率变化的畸变差检校方法。首先对影像上提取的直线进行二分,根据重新匹配出的直线可确定实际物方直线在影像上的投影因镜头畸变而产生弯曲的程度,以此可对镜头的畸变进行检校。但对于镜头畸变较大的情况二分直线无法检测出实际曲线的弯曲程度,因此,需要对所有共线的直线进行分组,由每组直线来确定实际曲线的弯曲程度,检校镜头畸变,从而消除其对影像的影响。实验证明,通过这种方法对镜头畸变进行检校,能够得到较好的结果。Abstract: An algorithm is presented based on curvature variance to calibrate the lens distortion of digital camera.At first,straight lines are extracted in the image while the actual line is slightly curved due to lens distortion.Therefore lines extracted are dimidiated and each line section is extracted again to detect the curvature caused by lens distortion.Then the curvature is used to calibrate lens distortion.It is proven by experiments that this algorithm comes out with satisfying result.
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