An Adaptive Two - Stage Approach toClassi cation of Surface

An adaptive two-stage approach is proposed for the classiication of surface defects. In the segmentation phase feature extraction is done and potential defect areas are marked. In the classiication phase features describing the shape and internal structure of defects are extracted and defects are classiied to diierent defect classes. The proposed segmentation scheme is taught with examples of faulty-free surface, and the classiication scheme with examples of defects. The use of the Self-Organizing Map in segmentation phase makes the proposed method adaptable to diierent types of surfaces. The results of experiments with base paper samples are encouraging.