24 July 2000 FFT-descriptors for shape recognition of military vehicles
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Abstract
An accurate method to detect and classify military vehicles based on the recognition of shapes is presented in this work. FFT-Descriptors are used to generate a scale, translation and rotation invariant characterization of the shape of such an object. By interpreting the boundary pixels of an object as complex numbers it is possible to calculate an FFT-Descriptor based on the spectrum of a Fast Fourier Transform of these numbers. It is shown that by using this characterization it is possible to match such representations with models in a database of known vehicles and thereby gaining a highly robust and fault tolerant object classification. By selecting a specific number of components of a FFT-Descriptor the classification process can by tailored to different needs of recognition accuracy, allowed shape deviation and classification speed.
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Andreas Wimmer, Andreas Wimmer, Georg S. Ruppert, Georg S. Ruppert, Oliver Sidla, Oliver Sidla, Harald Konrad, Harald Konrad, Floris M. Gretzmacher, Floris M. Gretzmacher, } "FFT-descriptors for shape recognition of military vehicles", Proc. SPIE 4029, Targets and Backgrounds VI: Characterization, Visualization, and the Detection Process, (24 July 2000); doi: 10.1117/12.392514; https://doi.org/10.1117/12.392514
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