水中物体的光学三维形貌测量的研究

丁万山; 刘艳

光学学报, 2007, 27 (1): 58, 网络出版: 2007-01-22

水中物体的光学三维形貌测量的研究

Optical Measurement of Object's Surface Three-Dimensional Shape in Water

论文大纲

丁万山 ^*刘艳

作者单位

南京航空航天大学自动化学院, 南京 210016

光学测量三维形貌水中物体折射极线约束亚像素 optical measurement three-dimensional shape object in water refraction epipolar constraint sub-pixel

摘要

提出了一种对水中物体进行光学投影式表面三维形貌测量的新方法。通常的测量方法都是假设摄像机和被测物体都处于空气中, 测量水中物体时, 由于光在空气、水分界面上发生折射, 投射到被测表面的光条纹图像发生扭曲, 从而给三角测量法带来误差。新方法可以精确测量出水中被测物表面的三维坐标并计算出物体的几何尺寸, 实验验证了该方法的有效性。考虑折射后, 该测量类似于在空气环境中的测量。采用的极线约束及亚像素技术, 提高了测量精度和速度。

Abstract

A three-dimensional measurement method of objects' shape in water by using light stripe projection is proposed. Usually, three-dimensional measurement is executed under the assumptions that cameras and objects are in aerial environments. However, stripe image distortion occurs when vision sensors measure objects in liquid, for the refraction of the light on the air and water interface, and brings errors in a triangulation. The proposed method can measure accurately three-dimensional coordinates of objects' surface in water, and calculate the geometrical size of the object. The validity of the proposed method is proved experimenally. By considering the refraction of light, the three-dimensional measurement of objects in water becomes same as in air and the measurement has a higher accuracy and speed because of the epipolar constraint and sub-pixel technology.

参考文献

[1] . Absolute interferometer for three-dimensional profile measurement of rough surfaces[J]. Opt. Lett., 2003, 28(7): 528-530.

[2] Kong Bing, Wang Zhao, Tan Yushan et al.. Multi-beam confocal system using pinhole array[J]. Chin. J. Lasers, 2002, A29(3): 263～266 (in Chinese)
孔兵, 王昭, 谭玉山等. 基于针孔阵列的多光束共焦三维测量系统[J]. 中国激光, 2002, A29(3): 263～266

[3] Kang Xin, He Xiaoyuan, Quan C. 3-D sensing using sinusoidal fringe projection and phase unwrapping[J]. Acta Optica Sinica, 2001, 21(12): 1444～1447 (in Chinese)
康新,何小元,Quan C. 基于正弦条纹投影的三维传感及其去包裹处理[J]. 光学学报, 2001, 21(12): 1444～1447

[4] Mitsuru Baba, Daisuke Narita, Kozo Ohtani. A new method of measuring the 3-D shape and surface reflectance of an object using a laser rangefinder[C]. IMTC 2004. Proc. the 21st IEEE, 2004, 2: 1349～1353

[5] . Fourier transform method for measurement of thin film thickness by speckle interferometry[J]. Opt. Engng., 2003, 42(6): 1694-1698.

[6] . Calibration of 3D surface profilometry using digital fringe projection[J]. Measurement Science & Technology, 2005, 16(8): 1554-1566.

[7] Qihong Lou. Development of excimer laser and its applications at SIOFM［R］. Pacific Rim Conference, IEEE, 1999, 3: 801～804

[8] Andreas Ettemeyer. Laser shearography for inspection of pipelines[J]. Nuclear Engineering and Design, 1996, 160(1～2): 237～240

[9] Y. Y. Hung, J. Q. Wang. Dual-beam phase shift shearography for measurement of in-plane strains[J]. Optics and Lasers in Engng., 1996, 24(5～6): 403～413

[10] Jung-Ryul Lee, J. Molimard, A. Vautrin. Digital phase-shifting grating shearography for experimental analysis of fabric composites under tension[J]. Applied Science and Manufacturing, 2004, 35(7～8): 849～859

[11] Ye Haijia, Chen Gang, Xing Yuan. Stereo matching in 3D measurement system using double CCD structured light[J]. Optics and Precision Engng., 2004, 12(1): 71～75 (in Chinese)
叶海加, 陈罡, 邢渊. 双目CCD结构光三维测量系中的立体匹配[J]. 光学精密工程, 2004, 12(1): 71～75

[12] Cui Jiwen, Tan Jiubin. Algorithm for edge subpixel location based on Zernike moment[J]. Optical Technique, 2005, 31(5): 779～785 (in Chinese)
崔继文,谭久彬. 基于Zernike矩的亚像素边缘定位算法[J]. 光学技术, 2005, 31(5): 779～785

[13] K. Hoshino, K. Tamura. Development of three-dimensional shape measurement method of the object in water[C]. IEEE Techno-Ocean ′04, 2004, 3: 240～1247

[14] Zhang Zhaoli, Zhao Chunhui, Mei Xiaodan. Advanced image processing technology and the implement of MATLAB[M]. Beijing: People′s Post and Telecommunication Press, 2001. 171～284 (in Chinese)
张兆礼,赵春晖, 梅晓丹. 现代图像处理技术及Matlab实现[M]. 北京: 人民邮电出版社, 2001. 171～284

丁万山, 刘艳. 水中物体的光学三维形貌测量的研究[J]. 光学学报, 2007, 27(1): 58. 丁万山, 刘艳. Optical Measurement of Object's Surface Three-Dimensional Shape in Water[J]. Acta Optica Sinica, 2007, 27(1): 58.

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