【摘要】 焊缝X光图像中的缺陷包括近似圆形和近似条形缺陷。由多尺度边缘检测理论可知:在适当尺度下,圆形缺陷在相互正交的两个方向上都是屋脊边缘,而条形缺陷只在一个方向上是屋脊边缘。利用区域一致性测度自适应确定小波滤波尺度。并在缺陷存在区域自适应确定LOG算子和方向可调滤波器的滤波尺度用以分割两种缺陷。理论分析和实验结果表明,算法有较好的分割效果。更多还原

【Abstract】 Defects in welding seam X-ray images include similar circular defects and similar bar defects.According to the theory of multiscale edges detection,the conclusion was drawn that in appropriate scale,circular defects are considered as roof edges in two directions that are orthogonal,while bar defects are viewed as roof edges in one direction.Wavelet scales can be confirmed by region homogeneity measure in this paper.LOG operator and filter scales of steerable filters were actively ascertained in the defect areas so that the two types of defects could be segmented.Theoretical analysis and experimental results show that this algorithm is effective.更多还原