Research on Edge Extraction Technique of the Image Border of Welding Pool Based on Mathematical Morphology

Aimed at the problem of the serious loss of marginal information when it is conducted with binaryzation in the edge extracting of weld pool image by using the method of mathematical morphology, one kind of improved plan is purposed in this paper. We can use local adaptive binarization method to carry out binaryzation, and then apply the median filtering to build connected region at the same time, use search fill algorithm to obtain the final binary image. We can use the method of mathematical morphology to select structural element with suitable shape and size and apply edge detection operator which is used four kinds of basic operation combinations of morphology to carry out edge detection for binary image. The simulation results show that this method can more accurately extract the image edge of welding pool on the basis of protecting marginal information of welding pool commendably.