位错点阵投影的三维数字成像

田劲东; 彭翔

光学学报, 2005, 25 (10): 1319, 网络出版: 2006-05-23

位错点阵投影的三维数字成像

Approach for Three-Dimensional Digital Imaging Via Position-Shift Point Array Projection

论文大纲

田劲东 ^*彭翔

作者单位

成像系统三维数字成像位错点阵深度图像轮廓测量 imaging systems 3-D digital imaging position-shift point array range image profilometry

摘要

提出一种基于位错点阵投影的三维数字成像方法,该方法以二维点阵结构光顺序照明参考平面和被测物体表面,通过分析分别投影在参考平面和物体上的点阵的成像过程,建立投射在参考平面和被测物体表面上的点阵中同一点在成像面上横向位置错动与被测物体深度之间的数学模型。依据此模型,通过计算相对应点在成像平面上的横向位移,可计算出物体的深度图像。二维点阵可以在垂直于光轴的平面内做横向和纵向的两维移动,以填补由于离散而丢失的其他空间点的深度信息,获得高空间分辨率。实验验证了该方法的可行性,此方法对于拓扑复杂的表面和大梯度表面有较强的适应性。

Abstract

A novel three-dimensional (3-D) imaging method based on position-shift point array projection is presented. A point-array structure light is projected sequentially onto the reference plane and the object surface, and then, a pair of point-array images form. By analyzing imaging process of the both point-arrays, a mathematical model that is able to express the relationship between height of the object and the lateral displacement of point is established. Based on this model, the 3-D digital image can be calculated by computing the lateral displacement of the same point on the two point-array images. In order to fill up the lost spatial information caused by discrete processing, the point-array can be moved along both lateral and axial direction step by step to achieve high spatial resolution. Experimental results are presented to show the theoretical predictions. This method is qualified for implementing 3-D profilometry of objects with complex topology or large height discontinuities.

参考文献

[1] . Brown, Mumin Song. Overview of three-dimensional shape measurement using optical methods[J]. Opt. Engng., 2000, 39(1): 10-22.

[2] Peng Xiang, Zhang Zhonghua, Zhu Shaoming et al.. 3D digital imaging system based on white-light digital Moire[J]. Acta Optica Sinica, 1999, 19(10): 1401～1405 (in Chinese)
彭翔,张宗华,朱绍明等. 基于白光数字莫尔的三维光学数字成像系统[J]. 光学学报, 1999, 19(10): 1401～1405

[3] Zhang Zhonghua, Peng Xiang, Hu Xiaotang. A new color 3-D optical imaging system[J]. Acta Optica Sinica, 2002, 22(8): 994～998 (in Chinese)
张宗华,彭翔,胡小唐. 一种新型的彩色三维光学成像系统[J]. 光学学报, 2002, 22(8): 994～998

[4] . Tizianib. 3-D imaging and modeling-Part I: acquisition and registration[J]. Optik, 2002, 113(12): 448-452.

[5] . A theoretical comparison of three fringe analysis methods for determining the three-dimensional shape of an object in the presence of noise[J]. Optics and Lasers in Engineering, 2003, 39: 35-50.

[6] . H. Bruning, D. R. Herriott, J. E. Gallagher et al.. Digital wavefront measuring interferometer for testing optical surfaces and lenses[J]. Appl. Opt., 1974, 13(11): 2693-2703.

[7] . Takeda, K. Mutoh. Fourier transform profilometry for the automatic measurement of 3-D object shapes[J]. Appl. Opt., 1983, 22(24): 3977-3982.

[8] Su Xianyu, Tan Songxin, Xiang Liqun et al.. Complex object shape measurement using FTP method[J]. Acta Optica Sinica, 1998, 18(9): 1228～1233 (in Chinese)
苏显渝,谭松新,向立群等. 基于傅里叶变换轮廓术方法的复杂物体三维面形测量[J]. 光学学报, 1998, 18(9): 1228～1233

[9] Weng Jiawen, Zhong Jingang. Application of dilating Gabor transform to threedimensional shape analysis[J]. Acta Optica Sinica, 2004, 24(6): 725～729 (in Chinese)
翁嘉文,钟金钢. 伸缩窗口傅里叶变换在三维形貌测量中的应用[J]. 光学学报, 2004, 24(6): 725～729

[10] . Toyooka, Y. Iwaasa. Automatic profilometry of 3-D diffuse objects by spatial phase detection[J]. Appl. Opt., 1986, 25(10): 1630-1633.

[11] Yu Daoyin, Tan Hengying. Engineering Optics[M]. Beijing: Mechanical Engineering Press, 1999. 130～131 (in Chinese)
郁道银,谈恒英. 工程光学[M]. 北京: 机械工业出版社, 1999. 130～131

田劲东, 彭翔. 位错点阵投影的三维数字成像[J]. 光学学报, 2005, 25(10): 1319. 田劲东, 彭翔. Approach for Three-Dimensional Digital Imaging Via Position-Shift Point Array Projection[J]. Acta Optica Sinica, 2005, 25(10): 1319.

位错点阵投影的三维数字成像

关于本站 Cookie 的使用提示

全站搜索

位错点阵投影的三维数字成像

相关论文

相关资讯

关于本站 Cookie 的使用提示

全站搜索