基于双外极线的结构光深度信息快速获取  

Fast structured light range data acquisition based on bi epipolar geometry constraint

作　　者：陈向荣[1] 朱志刚[1] 石定机[1] 

机构地区：[1]清华大学计算机科学与技术系

出　　处：《清华大学学报（自然科学版）》1998年第S1期99-102,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家"八六三"高技术项目

摘　　要：为快速有效地获取深度信息，本文提出一种基于结构光的三目主动式深度信息获取方法。该方法使用网格状结构光，利用两条外极线的约束关系，能够在合理的深度动态范围内有效地解决结构光的对应问题，从而为快速获取深度信息提供了有效的方法。作者采用文中所述的平行基线设置，设计并制作了一个简单的深度数据传感器。该装置可检测的深度范围为２０ｃｍ，得到的深度数据的平均误差在１ｍｍ以内。实验结果表明，本方法既有效地扩展了可检测深度范围，又避免了数据精度的损失，从而为许多实际的计算机视觉任务提供了有力的支持。To acquire range information quickly and effectively, a trinocular active range sensor based on structured light is suggested in this paper. In this method, a check board pattern structured light is projected on the scene. By using the constraint embodied in epipolar geometry, the problem of structured light identification can be resolved in reasonable depth range and hence the range data can be acquired effectively. A simple range sensor is designed and manufactured following the parallel base line setup suggested in this paper. The depth range of this sensor is 20cm and the average range data error is about 1mm. The experimental results show that the proposed method can expand the depth range effectively while preserve its accuracy.

关 键 词：计算机视觉 深度信息获取 结构光 外极线约束 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]