基于格雷码-相移的双目三维测量方法研究  

3D Measurement Technology Based on Binocular Vision Using a Combination of Gray Code and Phase-Shift Structured Light

作　　者：林焕[1] 马志峰[1] 姚春海[1] 王昊[1] 

机构地区：[1]北京理工大学信息与电子学院,北京100081

出　　处：《电子学报》2013年第1期24-28,共5页Acta Electronica Sinica

摘　　要：本文采用格雷码-相移组合的结构光,结合双目立体视觉技术,研究了三维表面测量方法.三维测量精度主要取决于格雷码-相移的解码精度,由于物体表面反射率不一致,不同区域又会相互反射,一般的阈值分割无法得到准确的二值化条纹图.因此在投射格雷码条纹图案基础上,再投射一组格雷码反码条纹图案.针对格雷码-相移解码过程中的周期错位问题,提出一种新的校正方法.将文中三维测量方法应用在人眼石膏模型的表面测量实验中,重建结果验证该方法的准确性和可靠性.3D surface measurement using binocular stereo vision technology and a coded structured light which combines Gray code with phase-shift is studied in this paper.The accuracy of 3D measurement mainly depends on the decoding of Gray code views and phase-shift views.However,it is difficult to threshold Gray code views because of the different albedos on regions of surface and interreflections on the surface.Therefore,after projecting Gray code patterns,their inverses are projected.A new method is proposed to solve the problem of period dislocation between Gray code and phase-shift in course of decoding.The experiment of the surface measurement of a human eye plaster model is used to test our 3D measurement method,and reconstruction results show the accuracy and reliability of our method.

关 键 词：三维测量 结构光 格雷码 相移 

分 类 号：TH741[机械工程—光学工程]