关键词: 焊缝缺陷, 识别, 决策树, 图像处理

Abstract: It is a hotspot of detection without damage to automatically analyze and recognize the defects classification of weld image.After the noise reduction and image enhancement，the defects of weld seam image are processed by threshold extraction and the weld defects features are selected.Then the classification rules are established by decision tree in order to recognize the threshold extracted defects of weld seam image.The results of experiments show that the defects classification is very accurate and the knowledge expression is very easy to understand.

Key words: defects of weld seam, recognition, decision tree, image process