Coplanar circles, quasi-affine invariance and calibration

详细信息    查看全文

• 作者：Yihong Wu ; Xinju Li ; Fuchao Wu and Zhanyi Hu
• 关键词：Associated lines with two coplanar circles ; Projective invariance ; Quasi-affine invariance ; Circular points ; Camera calibration
• 刊名：Image and Vision Computing
• 出版年：2006
• 出版时间：1 April 2006
• 年：2006
• 卷：24
• 期：4
• 页码：319-326
• 全文大小：493 K

文摘

We define the lines associated with two coplanar circles, and give the distributions of any two coplanar circles and their associated lines. Further we prove that the distribution of two coplanar circles with no real intersection and their associated lines is a quasi-affine invariance. Then the results are applied to calibrating a camera. The calibration method has the advantages: (1) it is based on conic fitting; (2) it does not need any matching. Experiments with two separate circles validate our quasi-affine invariance and show that the estimated camera intrinsic parameters are as good as those obtained by Zhang's (2000) method.