船用光电系统中摄像机参数的标定方法

基于一阶径向畸变的针孔摄像机模型，提出了一种新的线性三步摄像机定标方法，即通过径向排列约束计算摄像机参数的旋转矩阵、X轴平移矢量和Y轴平移矢量；根据透视投影的交比不变性解算一阶径向畸变参数；利用求得的摄像机参数建立有效焦距和Z轴平移矢量的线性方程，采用最小二乘法得到线性解。实验表明，该方法简单快捷，具有较高的标定精度，解决了原有算法采用非线性搜索寻优可能存在的解不稳定性等问题。

Calibrating method of camera in opto-electronic system

A new linear three-step approach for camera calibration was proposed to deal with camera model of one order radial distortion. In the first stage, all extrinsic parameters except for translation vector in Z-axis are computed by using the Radial Alignment Constraint (RAC). In the second stage, the one order radial distortion parameter is computed by using cross ratio invariability. In the third stage, all the missing parameters are computed by least square method. Experiments with simulated data as well as real image show that the new approach is efficient, robust and accurate. And the approach eliminates the nonlinear iterative calculation processes.