基于图像分析的显微视觉自动聚焦系统

孙明磊; 宗光华; 余志伟; 毕树生; 于靖军

基于图像分析的显微视觉自动聚焦系统

北京航空航天大学机械工程及自动化学院, 北京 100083

基金项目: 国家863基金资助项目(2002AA404460,2004AA404260)

详细信息

作者简介:
孙明磊(1974-),男,湖北襄樊人,博士生, mingleisun@263.net.

中图分类号: TP 2426⁺2
计量
- 文章访问数: 2711
- HTML全文浏览量: 166
- PDF下载量: 1301
- 被引次数: 0
出版历程
- 收稿日期: 2004-06-20
- 网络出版日期: 2005-02-28

Automatic focusing system of micro-vision based on image analysis

School of Mechanical Engineering and Automation, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

摘要

摘要: 开发了用于显微视觉对准装配的自动聚焦系统.系统采用基于图像空域分析的聚焦方式.首先通过对比,选择计算量最小的y向一阶差分算子作为系统的聚焦测度;然后通过合理选择聚焦窗口,优化了聚焦效果;最后提出一种不同于通常爬山法的自动聚焦策略,实现该方法的核心是建立聚焦函数与离焦量之间的函数关系,本系统采用3次样条插值估算未测聚焦函数值的办法构建了这种函数关系.应用结果表明该系统自动聚焦的准确性与实时性满足要求.
- 视觉 /
- 图像分析 /
- 自动聚焦 /
- 聚焦测度 /
- 聚焦策略
Abstract: An automatic focusing system of micro-vision for micro alignment assembly was developed. The system was based on spatial domain analysis. First-order differential operator in y direction was choosed as focusing evaluation function to realize autofocus quickly and accurately. Processing the image in a choosed focusing window was presented to optimize focusing effect. A new focusing algorithm was put forward, which is different from hill climbing searching algorithm(HCSA). The key factor of the algorithm is establishing the relation between defocus values and focusing evaluation. Cubic spline interpolation was adopted to establish focusing relation function to realize the algorithm effectively. It proves the system can realize autofocus accurately and quickly.
- vision /
- image analysis /
- auto-focus /
- focusing evaluation /
- focusing algorithm

HTML全文

参考文献(1)

[1] Firestone L. Comparison of autofocus methods for automated microscopy . Cytometry,1991,12(3):195~206 [2] Yeo T. Autofocus for tissue microscopy [J]. Image and Vision Computing,1993,11(10):629~639 [3] 任四刚,李见为,谢利利. 基于灰度差分法的自动调焦技术[J] 光电工程,2003,30(2):53~55 Ren Sigang,Li Jianwei,Xie Lili. Automatic focusing technique based on gray scale difference method[J]. Opto-Electronic Engineering,2003,30(2):53~55(in Chinese) [4] 李文恩,陈海清,李俊,等. 红外导引头成像光斑图像处理及自动聚焦[J]. 量子电子学报, 2003,20(3):364~369 Li Wenen,Chen Haiqing,Li Jun,et al. Image manipulation and autofocus of the infrared seeker[J]. Journal of Quantum Electronics, 2003,20(3):364~369(in Chinese) [5] 白立芬,徐毓娴,于水,等. 基于图像处理的显微镜自动调焦方法研究[J]. 仪器仪表学报, 1999,20(6):612~614 Bai Lifen,Xu Yuxian,Yu Shui,et al. Study on the microscope autofocus method based on image processing[J]. Chinese Journal of Scientific Instrument, 1999,20(6):612~614(in Chinese) [6] 李贺桥,张以谟,常容青,等. 图像采集自动生物显微镜系统自动调焦的研究[J].光学学报,1995,15(8):1106~1110 Li Heqiao,Zhang Yimo,Chang Rongqing,et al. Study on automatic focusing of image collecting automatic biological microscope system[J]. Acta Optica Sinica,1995,15(8):1106~1110(in Chinese) [7] 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,2004.395~397 Li Qingxiang, Wang Dongsheng, Li Yuhe. Design of modern precision instruments .Beijing:Press of Tsinghua University,2004.395~397(in Chinese)

施引文献

资源附件(0)

访问统计