射线照相焊缝缺陷数字化图像的分割

Study on the partition of digital image of weld flaw on radiogragh

射线底片焊缝缺陷图象经数字化图象预处理后 ,缺陷已经明显 ,但在自动识别前尚须进行图像分割 ,为此我们采用二阶导数过零边缘检测和阈值化分割算法。

After digital image processing,the image of weld flaw on radiogragh is clear,but before auto recognition,we should taking the algorithms of quadratic derivative passing zero fringe extraction,threshold selecting to partition the flaw image.