一种线结构光亚像素中心坐标提取方法 彭铖.pdf

激光杂志
Laser Journal
ISSN 0253-2743,CN 50-1085/TN

ng Sub-pixel Coordinates of Line Structured Light
Centre
Peng Cheng, Zhang Aijun*
School of Mechanical Engineering, Nanjing University of Science and Technology,
Nanjing 210094, China
Abstract In order to improve the accuracy and speed of light stripe center points extraction, a
new method for extracting subpixel centers of linear structured light stripes is proposed. First, the
image is filtered using median filter, and the contour tracking algorithm is used to avoid scanning
the pixels outside the light fringe area, so as to improve the calculation speed. Combined with the
gray centroid algorithm, the centers of the light stripe are initially extracted; Calculation of the
normal direction of the laser fringes by the averaging squared gray scale gradients method and
Linear interpolation is performed in the normal direction with the initial point as the center; The
gray weighted centroid algorithm is used to calculate the sub-pixel position of the center of the
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