1 December 2008 Precise center location for light spot contour images of light emitting diode control points in light-pen vision coordinate measurement
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Abstract
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.
© (2008) Society of Photo-Optical Instrumentation Engineers (SPIE)
Tingfa Xu, Tingfa Xu, Peng Zhao, Peng Zhao, } "Precise center location for light spot contour images of light emitting diode control points in light-pen vision coordinate measurement," Optical Engineering 47(12), 123602 (1 December 2008). https://doi.org/10.1117/1.3041745 . Submission:
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