| 基于双一维靶标的摄像机标定方法 |
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| 引用本文： | 杨珍.基于双一维靶标的摄像机标定方法[J].上海电力学院学报,2010(3). |
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| 作者姓名： | 杨珍 |
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| 作者单位： | 北京航空航天大学仪器科学与光电工程学院精密光机电一体化技术教育部重点实验室; |
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| 基金项目： | 国家自然科学基金资助项目(60804060,50727502); 高等学校博士学科点专项科研基金资助项目(200800061003) |
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| 摘 要： | 针对大视场摄像机的标定,提出一种基于双一维靶标的摄像机标定方法。两个一维靶标任意放置在摄像机视场内,摄像机从多角度拍摄靶标图像;利用一维靶标特征点共线的特性进行图像畸变校正;计算两个一维靶标所在空间直线在图像中的消影点,得到在空间中的夹角关于摄像机内参数矩阵的表达式,利用其所成角度恒定这一约束求解摄像机内部参数;采用非线性优化方法,求解摄像机内、外参数在最大似然准则下的最优解。仿真试验结果表明,当噪声水平小于0.5 pixel时,摄像机内部参数的相对误差均小于0.3%。实物试验结果表明,视场范围为1 200 mm×800 mm时,该方法的标定精度优于0.1 mm。
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| 关 键 词： | 摄像机标定 大视场 一维靶标 消影点 |
A new camera calibration method based on two 1-D targets |
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| YANG Zhen.A new camera calibration method based on two 1-D targets[J].Journal of Shanghai University of Electric Power,2010(3). |
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| Authors: | YANG Zhen |
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| Affiliation: | Key Laboratory of Precision Opto-mechatronics Technology,Ministry of Education,School of Instrumentation Science , Opto-electronics Engineering,Beijing University of Aeronautics & Astronautics,Beijing 100191,China |
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| Abstract: | A new camera calibration method based on two 1-D targets is proposed to solve the calibration problem of camera with large field of view,which only requires the camera to observe two arbitrarily placed 1-D targets from several different viewpoints.First,the target images are undistorted using the co-linearity of the feature points on 1-D target.Then the vanishing point of the spatial line defined by each 1-D target is computed,and the angle between two 1-D targets is expressed using the camera intrinsic par... |
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| Keywords: | camera calibration large field of view 1-D target vanishing point |
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