首页|Visual positioning of rectangular lead components based on Harris corners and Zernike moments

Visual positioning of rectangular lead components based on Harris corners and Zernike moments

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With the increasing necessities for reliable printed circuit board (PCB) product, there has been a considerable demand for high speed and high precision vision positioning system. To locate a rectangular lead component with high accuracy and reliability, a new visual positioning method was introduced. Considering the limitations of Ghosal sub-pixel edge detection algorithm, an improved algorithm was proposed, in which Harris corner features were used to coarsely detect the edge points and Zernike moments were adopted to accurately detect the edge points. Besides, two formulas were developed to determine the edge intersections whose sub-pixel coordinates were calculated with bilinear interpolation and conjugate gradient method. The last experimental results show that the proposed method can detect the deflection and offset, and the detection errors are less than 0.04° and 0.02 pixels.

visual positioningHarris cornersZernike momentsedge detectionsub-pixelimage registration

王祖进、黄筱调

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Department of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 211816, China

supported by the National Natural Science Foundation of Chinasupported by the Jiangsu Province Science and Technology Foundation of China

51175242BA2012031

2015

10.1007/s11771-015-2788-z

中南大学学报(英文版)
中南大学

中南大学学报(英文版)

CSCDSCIEI
影响因子：0.47
ISSN：2095-2899
年,卷(期)：2015.(7)
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