A multimodal constellation model for object image classification

Authors:
Yasunori Kamiya;Tomokazu Takahashi;Ichiro Ide;Hiroshi Murase
Affiliations:
Graduate School of Information Science, Nagoya University, Nagoya, Japan;Faculty of Economics and Information, Gifu Shotoku Gakuen University, Gifu, Japan;Graduate School of Information Science, Nagoya University, Nagoya, Japan;Graduate School of Information Science, Nagoya University, Nagoya, Japan
Venue:
Journal on Image and Video Processing - Special issue on selected papers from multimedia modeling conference 2009
Year:
2010

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Abstract

We present an efficient method for object image classification. The method is an extention of the constellation model, which is a part-based model. Generally, constellation model has two weak points. (1) It is essentially a unimodal model which is unsuitable to be applied for categories with many types of appearances. (2) The probability function that represents the constellation model requires a high calculation cost.We introduced multimodalization and speed-up technique to the constellation model to overcome these weak points. The proposed model consists of multiple subordinate constellation models so that diverse types of appearances of an object category could be described by each of them, leading to the increase of description accuracy and consequently, improvement of the classification performance. In this paper, we present how to describe each type of appearance as a subordinate constellationmodel without any prior knowledge regarding the types of appearances, and also the implementation of the extended model's learning in realistic time. In experiments, we confirmed the effectiveness of the proposedmodel by comparison to methods using BoF, and also that the model learning could be realized in realistic time.