关键词: 两步法 摄像机标定 内部参数 外部参数

Abstract:

The Two-Step Method is a classical multistage optimization algorithm. It is easy to implement and can get accurate results.The most important part of   the algorithm is the initial value of external parameters and distortion-free internal parameters through the first step.The computation is complicated because it is not a pure linear problem.In this paper, we improve the computation procedure and adopt a new method to get the initial value.In addition, the precision of image coordinates affects the accuracy of camera calibration directly,so we deal with the images using the mathematical morphology and  eliminate the noise infection effectively.The experimental results show that the algorithm in this paper decreases the operating quantities compared wit h the Two-step Method, and the calibration results are applicable on the occasions which require high precision.

Key words: two-step method;camera calibration;internal parameters;external parameters