DUAN Rui-ling, DUAN Hui-bo, LI Qing-Xiang, et al. Micro-assembly auto-focusing system based on image processing[J]. Optics and precision engineering, 2006, 14(3): 468-471.
DUAN Rui-ling, DUAN Hui-bo, LI Qing-Xiang, et al. Micro-assembly auto-focusing system based on image processing[J]. Optics and precision engineering, 2006, 14(3): 468-471.DOI:
an auto-focusing system consisted of optical microscope
CCD
moment motor and drive gear etc
was presented. In combination of coarse with fine adjustment method
this system applied Krisch-image edge gradient operator to evaluate the entire microscopic image of the micro-object for its coarse focus position
the system also used the sharpness function based on high frequency component to evaluate the certain domain of the microscopic image for fine adjustment. The sharpness functions used in the experiment were programmed with Visual C++
and the experimental results show that the position accuracy of auto-focusing system is less than ±4.8 μm
which satisfies the focusing requirement of the micro-assembly.
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references
. 李庆祥,王东生,李玉和.现代精密仪器设计[M]. 北京:清华大学出版社,2004. LI Q X, WANG D S, LI Y H. The design of modern precise instruments [M].Beijing: Tsinghua University Press, 2004.(in Chinese)
. 李玉和. 基于光学显微镜的微器件装配系统关键技术的研究 . 北京:清华大学,2001. LI Y H. Research on key technologies for micro-parts assembly system based on optical microscope . Beijing: Tsinghua University, 2001.(in Chinese)
. 门涛,陈建安. 基于平滑阈值函数的小波图像去噪[J]. 计算机工程与科学,2004,26(8):50-52. MEN T, CHEN J A. Wavelet denoise image based on smoothing threshold function[J].Computer Engineering and Scientifics,2004, 26(8):50-52.(in Chinese)
. ASHOK A,NEIFELD M A. Information-based analysis of simple incoherent imaging systems[J]. Opt. Express, 2003 (11), 2153-2162.
. HUGHLETT E,KAISER P. An autofocus technique for imaging microscopy . IEEE Int Conf on Acoustics, Speech and Signal Processing,1992:93-96.
. YEO T T E, ONG S H. Auto-focusing for tissue microscopy [J]. Image and Vision Computing, 1993, 11(10):629-639.
. 杨再华. 显微系统自动调焦方法研究 . 北京:清华大学,2004. YANG Z H. Research on auto-focus technology of microscopy system . Beijing: Tsinghua University, 2004.(in Chinese)