Precise center location for light spot contour images of light emitting diode control points in light-pen vision coordinate measurement

Ting-fa Xu; Peng Zhao

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Precise center location for light spot contour images of light emitting diode control points in light-pen vision coordinate measurement

机译：Precise center location for light spot contour images of light emitting diode control points in light-pen vision coordinate measurement

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摘要

In a light-pen single-camera three-dimensional (3-D) coordinate vision measurement system, a key step is the fast and precise center location for the light spot contour images of the LED control points obtained by the charge-coupled device (CCD) camera. A novel center location scheme for the light spot contour images is proposed in this key step. This scheme uses a geodesic active contour model to obtain every light spot's contour edge simultaneously. Then the center coordinate of every light spot is measured using a subpixel scheme. Compared to the common scheme using the edge detection and the contour tracking, this scheme is highly precise and fast for the center location of every light spot in a CCD image.

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来源
《Optical Engineering》 |2008年第12期|123602-1-123602-9-0|共9页
作者
Ting-fa Xu; Peng Zhao;
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作者单位

Beijing Institute of Technology, Department of Photoelectric Engineering, Beijing 100081, China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
中图分类光学仪器;
关键词
vision measurement; light pen; coordinate measurement; active contour;

Precise center location for light spot contour images of light emitting diode control points in light-pen vision coordinate measurement

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