一种基于平面模板的摄像机自定标方法

给出仿射坐标系下场景中平面与像平面的单应关系、绝对二次曲线及其图像的表示．通过对场景中一个平面模板获取3幅图像(该模板是由含内切圆的等边三角形构成)，利用上述单应关系并结合圆环点对摄像机内参数的约束，获得一组线性方程，进而确定摄像机的内参数．实验结果表明，所给出的方法切实可行，且具有较高的求解精度．

A Method of Camera Self-calibration Based on a Planar Template

This paper first presents the homography between a plane in the scene and a plane of the image, and the absolute conic in space under an affine coordinates. With the homography under an affine coordinates, and using the constraints for circular points to camera intrinsic parameters, we obtain a group of equations from several images containing a planar template, which consists of an equilateral triangle with the inscribed circle. By linearly solving the above equations, we determine the intrinsic parameters. Experimental result shows that our approach is highly accurate.