title: Rotation-invariant texture retrieval with Gaussianized steerable pyramids.
abstract: 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.
authors.affiliation: Department of Computer Science, University of Crete and Institute of Computer Science (ICS-FORTH), 711 10 Heraklion, Crete, Greece. gtzag@ics.forth.gr
authors.forename: George
authors.initials: G
authors.lastname: Tzagkarakis
authors.forename: Baltasar
authors.initials: B
authors.lastname: Beferull-Lozano
authors.forename: Panagiotis
authors.initials: P
authors.lastname: Tsakalides
mesh_terms: D000465:Algorithms; D001185:Artificial Intelligence; D003198:Computer Simulation; D007089:Image Enhancement / Q000379:methods*; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D016247:Information Storage and Retrieval / Q000379:methods*; D015233:Models, Statistical; D016011:Normal Distribution; D010363:Pattern Recognition, Automated / Q000379:methods*