Chinese Journal of Mechanical Engineering

Key Technology on Stereo Image Mosaic of

Shape Measurement

REN Tongqun ZHU Jigui LI Yanjun YE Shenghua

(State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072)

Abstract: A stereo image mosaic method based on global control points is proposed. The global coordinate system can be set up by stable laser spots scattering symmetrically around object to be measured. During every local measurement, the transform relation between probe coordinate system and mosaic camera coordinate system can be obtained by introducing mosaic target into measurement. And the relation between probe coordinate system and global coordinate system can be drawn using mosaic camera as intermediary. Then the results of local measurements can be unified in global system to fulfill the mosaic. This method can avoid multi-signs and preserve object’s original contour. It overcomes the error accumulation of methods based on superposition between neighboring images.

Key words: Image mosaic Global control point Shape measurement

CLC No: TP391

国家自然科学基金(50735003)和天津市应用基础研究重点(05YFJ ZJC01700)资助项目. Received 20070515 , received in revised form 20080113

Open or Download Full Text of this Paper (PDF File)

References

[1] LONG Xi, ZHONG Yuexian, LI Renju,et al. 3-D surface integration in structured light 3-D scanning[J]. Journal of Tsinghua University(Science and Technology), 2002, 42 (4): 477-480.
[2] MA Yangbiao, ZHONG Yuexian, ZHENG Ling, et al. Design and recognition of coded targets for 3D registration[J]. Journal of Tsinghua University(Science and Technology), 2006, 46(2): 169-175.
[3] WU Bin. Study on several key techniques of near-Infrared spectroscopy analysis[D]. Tianjin: Tianjin University, 2003.
[4] MEMBER P J, B. A method for registration of 3-D shapes[J]. IEEE Transactions on Pattern Analysis and Machine Intelligence, 1992, 14(2): 239-256.
[5] SHARP G C, MEMBER S. ICP registration using invari-ant features[J]. IEEE transactions on Pattern Analysis and Machine Intelligence, 2002, 24: 90-102.
[6] ZHAO Xiaosong, ZHANG Hongwei, ZHANG Guoxiong, et al. Study on camera calibration technology[J]. Chinese Journal of Mechanical Engineering, 2002, 38(3): 149-151.
[7] HUANG Guiping, LI Guangyun. Study of system orienta-tion and coordinate calculation of IMS[J]. Acta Geo-daetica et Cartographic Sinica, 2003, 32(3): 13-17.
　