摘要
提出一种运动变焦相机分步自标定的方法,即事先标定相机的纵横比和主点,在假设像素为矩形及主点为图像中心的情况下,基于Kruppa方程线性求解焦距.算法中只需输入基础矩阵,不必预先进行任何类型的投影阵分解或投影束校正.线性求解焦距避免了非线性法的不稳定性.实际数值实验表明该方法简单实用.
A novel technique for self\|calibration of cameras with varying focal length is introduced. The aspect ratio and principal point can be estimated beforehand because they are unchangable during camera′s movements, provided that zero\|skew and the principal point are at the center of the image, an linear solution is derived from using the Kruppa equations. The input of the algorithm is a set of fundamental matrices, and it is not necessary to perform any projective factorization or projective bundle adjustment. An step\|by\|step linear algorithm which can avoid unstability of nonlinear problem has been developed. Experiments with real data synthetized have shown that the technique is simple and useful.
出处
《大连理工大学学报》
CAS
CSCD
北大核心
2003年第1期82-85,共4页
Journal of Dalian University of Technology
基金
国家自然科学基金资助项目(59805001).
