Defects detection is very important to guarantee the welding quality. Many researchers have been done on thisudarea. However, most of them are limited in efficiency. Different from these researches, a method that is used to detect defectsudfrom the radiographic images of welding is put forward. This paper discusses an effective method to segment of the defects inudwelding images. We also use Two Dimensional Left Median Filter for enhancing the images. Experimental results show thisudmethod is effective in noisy and low contrasted radiographic images of weld.
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