Extraction of primitive feature of vision images based on spatial moment
GE Xing-wei · Journal of Optoelectronics·laser · 2010
A spatial moment operator of image edge model for the three-gray-level image is proposed.Firstly the Laplacian of Gaussian(LOG) operator is used to locate the edge at the level of pixel quickly,and then the spatial moment is used for subpixel location of the edge in the domain containing edge points.The beeline and ellipse edge pixel points are extracted by the Hough transform.The least square fitting edge extraction is adopted to obtain the subpixel beeline and ellipse.The validity and precision of spatial moment subpixel edge location and the extraction of beeline and ellipse on image plane are studied.The experimental results show that the algorithm proposed in this paper has better precision and stability under a certain measurement speed.