Localising Surface Defects in Random Colour Textures using Multiscale Texem Analysis in Image EigenchannelsXianghua Xie, Majid Mirmehdi, Localising Surface Defects in Random Colour Textures using Multiscale Texem Analysis in Image Eigenchannels. Proceedings of the 12th IEEE International Conference on Image Processing, pp. 1124–1127. September 2005. PDF, 293 Kbytes.
A novel method is presented to detect defects in random colour textures which requires only a very few normal samples for unsupervised training. We decorrelate the colour image by generating three eigenchannels in each of which the surface texture image is divided into overlapping patches of various sizes. Then, a mixture model and EM is applied to reduce groupings of patches to a small number of textural exemplars, or texems. Localised defect detection is achieved by comparing the learned texems to patches in the unseen image eigenchannels.