DEFORMATION DETECTION WITH FREQUENCY-MODULATION

We describe a robust and knowledge-free method to perform the deformat ion extraction from textured images. We first recall how the Solid Mec hanics approach of deformation leads to a nonseparability of the coupl e ''deformation/motion'' in the case of elastic material, but sets a d istinction in the plastic case. We then present a frequency-modulation /demodulation based method to recognize the deformation within texture d images. Choices, algorithm limits and suitable data are discussed. E ventually, results are presented in the static case, that is on a sing le image, and then in tracking deformed areas within image sequences. Copyright (C) 1996 Pattern Recognition Society. Published by Elsevier Science Ltd.