Restructured Eigenfilter Matching for Novelty Detection in Random TexturesAmir Monadjemi, Majid Mirmehdi, Barry Thomas, Restructured Eigenfilter Matching for Novelty Detection in Random Textures. Proceedings of the 15th British Machine Vision Conference. ISBN 1-901725-25-1, pp. 637–646. September 2004. PDF, 431 Kbytes.
A new eigenfilter-based novelty detection approach to find abnormalities in random textures is presented. The proposed algorithm reconstructs a given texture twice using a subset of its own eigenfilter bank and a subset of a reference (template) eigenfilter bank, and measures the reconstruction error as the level of novelty. We then present an improved reconstruction generated by structurally matched eigenfilters through rotation, negation, and mirroring. We apply the method to the detection of defects in textured ceramic tiles. The method is over $90\%$ accurate, and is fast and amenable to implementation on a production line.