新型三维视觉测量结构光平面标定方法  

Novel Method for Structured Light Plane Calibration in Three-Dimensional Vision Measurement

作　　者：俞乾[1] 张旭苹[1] 张益昕[1] 王顺[1] 戚力[1] 

机构地区：[1]南京大学光通信工程研究中心,江苏南京210093

出　　处：《中国激光》2012年第B06期277-281,共5页Chinese Journal of Lasers

基　　金：江苏省自然科学基金（BK2009257）和江苏省普通高校研究生科研创新基金（CXl0B_020Z）资助课题.

摘　　要：结构光平面标定是结构光三维视觉测量中的重要环节。传统的标定方法需要昂贵的设备，效率低下，步骤复杂。提出了一种新的三维视觉系统中结构光平面的标定方法。该方法仅使用一个简单的二维平面靶标，在保证靶标与结构光相交的前提下，靶标在摄像机可视范围内自由移动数个位置。对于移动到各个位置的靶标平面，分别建立对应的世界坐标系，并计算该世界坐标系与摄像机坐标系、图像坐标系的转换关系。通过处理算法，可以将每一个位置得到的结构光平面与靶标平面的交线方程统一到摄像机坐标系下。使用最小二乘法拟合多条交线可以标定出结构光平面在摄像机坐标系下的方程。实验证明该方法效率高，步骤简单，具有很好的通用性。The calibration of structured light plane is the key technique in structured light three-dimensional vision measurement. The traditional methods require expensive equipments and complex procedure, and the efficiency is quite low. A novel method for structured light plane calibration is presented. In this method, a simple two- dimensional planar target is used. The target can be freely moved to different positions in the visible space of the camera if only the target and the structured light plane can intersect to each other. The corresponding world coordinate is set for each target in different positions. Transformation relation among the world coordinate, camera coordinate and image coordinate can be calculated. Through processing, the intersecting lines＇ equations of different positions are unified at the camera coordinate system. Then we can use least square method to fit the structured light plane＇s equation. The experimental results show that the proposed method is a universal method with high efficiency and simple procedure.

关 键 词：机器视觉 三维视觉测量 结构光平面 标定 平面靶标 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]