Abstract
The welding seam image gathered by an optical system composed of charge-coupled device(CCD) camera and composite filter technology for pipe-line back welding of metal active gas(MAG) is analyzed in a bid to extract the weld pool edge.Considering the effect of initial contour on Chan-Vese model,extract the rectangle representing the coarse location of molten weld pool by using the gray information after Gaussian smoother,and set the initial contour of Chan-Vese model at the center of the rectangle,then use the Chan-Vese model to extract the edge of the weld pool.Compared with the traditional methods,the experimental results show the precision of weld pool extraction is greatly improved.
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