Fast positioning method for components based on edge extraction and Fourier transform

The invention relates to a fast positioning method for components based on edge extraction and Fourier transform, which comprises the steps of performing edge extraction by applying a Sobel operator,reducing the calculation amount of image processing, acquiring a cross-power spectrum of a component full image and a template image by adopting Fourier transform, building template windows accordingto the size of a component in the template image, solving maximum values of the template windows, acquiring coordinates of numerous maximum value points, removing coordinate positions of a large number of small maximum value points by adopting a parameter method, detecting whether the rest of the maximum value points are true maximum value points or not along the X-axis and Y-axis directions by applying a reticle method, and deleting false maximum value points, so that the finally acquired maximum value points are accurate positions of the components. Positioning for multiple targets can be performed according to the m