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Development of Defect Detection Algorithm in Cellular Denitration Catalyst

Denitration catalyst defect detection based on image processing plays a vital role in automated inspection of product quality. In this paper, we propose a defect detection algorithm based on image processing to inspect the cellular denitration catalyst. In pre-processing, Hough transform, morphological processing and connected component labeling are used to find the defect location. In the process of defect categories recognition, the Hu moments combined with geometrical features are used. Besides, support vector machine classifier is trained to detect the defect categories. The proposed algorithm shows high defect recognition accuracy achieving 96% overall.