一种面结构光投影仪的标定方法  

Calibration Method of Surface Structured Light Projector

作　　者：唐栋梁 何卫锋 欧阳祥波[1] TANG Dong-liang;HE Wei-feng;OUYANG Xiang-bo(School of Electromechanical Engineering,Guangdong University of Technology,Guangdong 510006,China)

机构地区：[1]广东工业大学机电工程学院,广州510006

出　　处：《包装工程》2020年第19期217-222,共6页Packaging Engineering

基　　金：广东省省级科技计划(2013B011301023)。

摘　　要：目的研究并提出一种简单的面结构光投影仪的标定方法,结合试验搭建的测量平台,实现对饮料瓶、易拉罐、瓶盖等形状规则的包装件以及轮廓复杂人脸的准确测量。方法首先借助二维灰度棋盘格标定板并采用张正友法标定好摄像机,再向标定板投影设定好的黑白棋盘格图案,然后结合图像阈值分割和形态学操作方法获取相机捕获投影图案的特征点坐标,最后使用标定好的摄像机参数来标定投影仪。结果文中提出的标定方式相对操作简单、成本低,且在x和y方向的重投影误差基本都小于1个像素。结论测量实验结果表明,文中标定方法能保证对人脸模型较理想的测量精度,有较好的应用范围。The paper aims to study and propose a simple calibration method of surface structured light projector,and accurately measure packages with regular shapes such as beverage bottles,cans,and bottle caps,as well as human faces with complex contours in combination with the measurement platform built in the experiment.Firstly,a two-dimensional gray checkerboard calibration board was used to calibrate the camera,and then the set black and white checkerboard pattern was projected onto the calibration board.Then,the coordinates of feature points of the camera captured projection pattern were obtained in combination with image threshold segmentation and morphological operation.Finally,the calibrated camera parameters were used to calibrate the projector.The calibration method proposed in this paper is relatively simple and cost effective,and the projection error in the x and y directions was basically less than 1 pixel.The measurement experiment results show that the calibration method in the paper can guarantee the ideal measurement accuracy and has a good application range.

关 键 词：三维测量 投影仪标定 阈值分割 面结构光 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]