自动化几何校正中相机位姿自动校正方法

Automatic Location Method of Camera for Geometrical Calibration

为了解决多投影仪拼接显示系统自动几何校正中相机位姿的自动校正问题,提出了一种利用目标区域角点集的最小外接矩形确定目标的倾斜状态的方法。首先运用Harris角点检测算子检测出目标区域的角点集,并根据角点集的凸包求其最小外接矩形,然后计算最小外接矩形的长或宽的斜率判断出目标区域的倾斜状态,最后结合云台的控制,对相机姿态做出实时调整,实现了自动几何校正工作中相机位姿的自动校正功能。

In order to solve the problem of auto-adjust the camera pose in multi-projector displays system geometrical auto-calibration,a method was proposed to determine the target area s tilt state,using the mininum enclosing rectangle of target area s corner set.Firstly,using Harris corner detector to detect the corner set of the target area,then calculate the minimum enclosing rectangle according to the the convex hull of the corner set,and then figure out the slope of the mininum enclosing rectangle s edge,finally, combining with platform control of the camera to make real-time attitude adjustment.