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1. 四川大学
2. 四川大学 制造科学与工程学院四川,成都,610065
纸质出版日期:2009,
网络出版日期:2008-12-7,
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王德麾,樊庆文,袁中凡.一种基于多灭点标定数码相机内外参数的方法[J].工程科学与技术,2009,41(5):193-196.
Wang De-Hui, Fan Qing-Wen, 袁中凡. New Way of Calibrating Camera’s All Parameters With Vanishing Points[J]. Advanced Engineering Sciences, 2009,41(5):193-196.
中文摘要: 摘要:提高相机定标精度,简化定标过程,是计算机视觉研究的重要内容。利用包含至少4组平行线和两个定标点的模板,对模板一次拍照即可标定相机内外参数。先利用Hough变换,检测出模板图像中的各直线,确定对应的灭点;再把灭点坐标及已知的各组平行线的方向向量代入隐参数矩阵计算方程,得到相机的隐参数矩阵;最后对隐参数矩阵进行分解,依次得到相机的内部参数矩阵 和旋转矩阵 ,然后利用模板中两个已知空间坐标的定标点计算相机的位移矩阵 。该方法的求解过程仅涉及到线性方程组的求解,定标精度高、稳定性好,与基于主灭点的定标法相比,不需要相机做任何运动,定标过程简单,具有一定的理论意义和实用价值。
Abstract:Abstract:The most important mission in the field of the computer vision is how to improve the precision of the camera’s scaling and how to simplify the process.For this purpose
a new method to calibrate the camera’s all the interior and exterior parameters using at least 4 directions vanishing points and 2 calibratinon points is brought forward.It only needs one image of the template which is devised in this paper.Then use Hough transform to detect lines in the image and further locate the vanishing points in each directions; use camera-calibrating equations which are brought up in the paper with the positions of the vanishing points to resolve the camera’s implicit parameters matrix; finally divide the matrix into the camera’s interior and exterior parameters according to the matrix’s characteristic and accomplish the calibration.Compared with other calibrating ways
this method is more facility and precise.
相机定标 灭点 Hough变换 直线检测
camera calibration vanishing point Hough transform line detection
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