分离物体三维测量的彩色结构光编码新方法  

A New Color Structured Light Coding Method for Three-Dimensional Measurement of Isolated Objects

作　　者：麻珂[1] 张启灿[1] 

机构地区：[1]四川大学电子信息学院光电系,四川成都610064

出　　处：《中国激光》2010年第11期2918-2924,共7页Chinese Journal of Lasers

基　　金：国家自然科学基金(60807006)资助课题

摘　　要：提出了一种结合颜色、格雷码和正弦光栅的编码新方法,用于测量空间分离物体的三维面形。该彩色格雷码正弦条纹图案表现为用颜色信息编码的正弦条纹图案,利用此条纹图案来记录物体的三维面形数据。首先投射一幅彩色格雷码正弦条纹来调制被测物体的三维信息,摄像机拍得物体表面的变形条纹图,然后应用傅里叶变换方法获取截断相位,根据编码特征进行解码来指导截断相位的展开,获得展开相位,进而恢复出物体的三维面形。该方法编码稳定,解码方法可靠,只需要拍摄一幅图,就可以较好地重建空间分离物体的三维面形。空间分离物体的实验结果以及与基于调制度排序的截断相位二维空间展开结果的对比,均证明了该方法的正确性和可行性。A new coding method based on color Gray-code is proposed for measuring the three-dimensional（3D） shape of the isolated objects in space.This coded fringe appears to be a color coded sinusoidal fringe,which is used to record the information of object′s 3D shape.Firstly,a digital color coded sinusoidal fringe is projected onto the tested object′s surface to modulate the height information of the measured object into its phase distribution,then the color Gray coding is used to obtain the fringe order and the sinusoidal fringe is used to get the wrapped phase.With only one image,3D shape of the isolated objects can be exactly reconstructed.An actual measurement is done,the results of the reconstructed shapes prove its correctness and feasibility.

关 键 词：光学测量 三维面形测量 机器视觉 颜色编码条纹 分离物体 

分 类 号：TN247[电子电信—物理电子学] O438.2[机械工程—光学工程]