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Rotation-invariant texture retrieval with gaussianized steerable pyramids

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3 Author(s)
Tzagkarakis, G. ; Inst. of Comput. Sci., Univ. of Crete, Heraklion ; Beferull-Lozano, B. ; Tsakalides, P.

This paper presents a novel rotation-invariant image retrieval scheme based on a transformation of the texture information via a steerable pyramid. First, we fit the distribution of the subband coefficients using a joint alpha-stable sub-Gaussian model to capture their non-Gaussian behavior. Then, we apply a normalization process in order to Gaussianize the coefficients. As a result, the feature extraction step consists of estimating the covariances between the normalized pyramid coefficients. The similarity between two distinct texture images is measured by minimizing a rotation-invariant version of the Kullback-Leibler Divergence between their corresponding multivariate Gaussian distributions, where the minimization is performed over a set of rotation angles

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Image Processing, IEEE Transactions on  (Volume:15 ,  Issue: 9 )