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| Image Hierarchical Representation Model Based on LDA |
| JIA Zhen-Hua, SIQING Ba-La |
| Department of Computer Science and Engineering, North China Institute of Aerospace Engineering, Langfang 065000 |
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Abstract The existing image hierarchical representation methods are strict in feed-forward style, and therefore it is not able to solve problems like local ambiguities well. In this paper, a probabilistic model is proposed to learn and deduce all layers of the hierarchy together. Specifically, a recursive probabilistic decomposition process is taken into account, and a generative model based on latent Dirichlet allocation with pyramidal multilayer structure is derived. Two important properties of the proposed probabilistic model are demonstrated: adding an additional representation layer to improve the performance of the flat model and adopting a full Bayesian approach which is better than a feed-forward implementation of the model. Experimental results on a standard recognition dataset show that the proposed method outperforms the existing hierarchical approaches, and it improves the classification and the learning accuracy with better performance.
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Received: 14 August 2012
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2013, Vol. 26 
