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Proceedings Paper

The study of optical feature point imaging gray value automation control method with movement
Author(s): Changying C. Liu; Qingcheng Huang; Dong Ye; Rensheng Che; Qiaoyu Xu
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Paper Abstract

In order to solve the problem that feature point imaging quality affects the measurement precision of vision system, a method of optical feature point imaging gray value automation control with movement is proposed. The method eliminates the effect of the relative position changes of camera and feature point on imaging gray value by automatic modulating the current in the feature point and camera exposure time. To control the luminance of feature point automatically, a invariable current source which may be controlled by program is constructed using digitally controlled potentiometer, dynatron, operational amplifier and so on. The experiments prove that the system hold nicer linearity, good sensitivity and response, the control method makes it true that the imaging value of feature point always keeps in the ideal range.

Paper Details

Date Published: 12 January 2005
PDF: 8 pages
Proc. SPIE 5632, Light-Emitting Diode Materials and Devices, (12 January 2005); doi: 10.1117/12.576018
Show Author Affiliations
Changying C. Liu, Harbin Institute of Technology (China)
Qingcheng Huang, Harbin Institute of Technology (China)
Dong Ye, Harbin Institute of Technology (China)
Rensheng Che, Harbin Institute of Technology (China)
Qiaoyu Xu, Harbin Institute of Technology (China)


Published in SPIE Proceedings Vol. 5632:
Light-Emitting Diode Materials and Devices
Gang Yu; Chuangtian Chen; Changhee Lee, Editor(s)

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