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Wavelet-based texture retrieval using generalized Gaussian density and Kullback-Leibler distance

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2 Author(s)
Do, M.N. ; Dept. of Commun. Syst., Swiss Fed. Inst. of Technol., Lausanne, Switzerland ; Vetterli, M.

We present a statistical view of the texture retrieval problem by combining the two related tasks, namely feature extraction (FE) and similarity measurement (SM), into a joint modeling and classification scheme. We show that using a consistent estimator of texture model parameters for the FE step followed by computing the Kullback-Leibler distance (KLD) between estimated models for the SM step is asymptotically optimal in term of retrieval error probability. The statistical scheme leads to a new wavelet-based texture retrieval method that is based on the accurate modeling of the marginal distribution of wavelet coefficients using generalized Gaussian density (GGD) and on the existence a closed form for the KLD between GGDs. The proposed method provides greater accuracy and flexibility in capturing texture information, while its simplified form has a close resemblance with the existing methods which uses energy distribution in the frequency domain to identify textures. Experimental results on a database of 640 texture images indicate that the new method significantly improves retrieval rates, e.g., from 65% to 77%, compared with traditional approaches, while it retains comparable levels of computational complexity

Published in:

Image Processing, IEEE Transactions on  (Volume:11 ,  Issue: 2 )

Date of Publication:

Feb 2002

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