摘要
介绍了一种基于等价图像的摄像机自标定方法。在仅拍摄一幅目标图像的基础上,利用目标结构的对称性得到与背景内容无关的对称等价图像,对对称图像进行等比缩放得到对称缩放等价图像,使用于自标定的图像数目倍增,便于图像目标的特征匹配。根据原图中相互垂直的特征直线的消影点对以及等价图像上的对称消影点对列出关于内参数的方程祖,求解方程组完成对内参数的自标定。实验结果证明,该方法原理简单、易于实现,并具有较高的定标精度。
A new method of camera self-calibration based on the equivalent images is presented.The symmetrical equivalent images to be not concerned with background are drawn based on the reflective symmetry of the target.The scaled symmetrical equivalent images are drawn by doing scale transform on the previous one.The number of images used to self-calibrations is tripled and the feature match is facilitated.For all images,the equations are established by the relation between the intrinsic matrix and the two vanishing points,and the two vanishing points separately belong to two lines which are perpendicular to each other.The solution is the intrinsic parameters.The results of experiment shows that the method is easy to realize and has high precision.
出处
《光学技术》
EI
CAS
CSCD
北大核心
2008年第2期217-220,共4页
Optical Technique
关键词
摄像机自标定
对称
缩放
等价图像
消隐点
camera self-calibration
symmetrical
scaled
equivalent image
vanishing point
