摘要
提出了一种求解摄像机内参数的非线性方法。首先对空间单个矩形的图像获得含参数r的圆环点的图像,其中r为该矩形的长宽比;进而由圆环点对摄像机内参数的约束获得一组非线性方程;通过把非线性方程组求解问题转为含3个参数的最优化问题来确定摄像机的内参数。该方法的特点在于,无需知道矩形的任何信息,也容易将所获得的非线性方程组转化为最优化问题。实验结果表明,该方法具有较高的求解精度。
This paper introduces a nonlinear approach for determining the camera intrinsic parameters. Firstly, by the image of a single rectangle in space, we obtain the images of two circular points which contains a parameter r, where r is the ratio of the length of two adjacent sides of the rectangle; and then establish some nonlinear constraints on the intrinsic parameters and the parameter r via the obtained images of the circular points. By turning the problem of solving the nonlinear equations into an optimization problem, the camera intrinsic parameters are determined. Experimental result shows that the approach has a high accuracy.
出处
《中国图象图形学报（A辑）》
CSCD
北大核心
2005年第4期505-510,共6页
Journal of Image and Graphics
基金
安徽省自然科学基金资助项目(01042206)
