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Viola-Jones Object Detection Algorithm Using Rectangular Feature  

Seo, Ji-Won (Department of Electrical Engineering, Ajou University)
Lee, Ji-Eun (Department of Electrical Engineering, Ajou University)
Kwak, No-Jun (Department of Electrical Engineering, Ajou University)
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Abstract
Viola-Jones algorithm, a very effective real-time object detection method, uses Haar-like features to constitute weak classifiers. A Haar-like feature is made up of at least two rectangles each of which corresponds to either positive or negative areas and the feature value is computed by subtracting the sum of pixel values in the negative area from that of pixel values in the positive area. Compared to the conventional Haar-like feature which is made up of more than one rectangle, in this paper, we present a couple of new rectangular features whose feature values are computed either by the sum or by the variance of pixel values in a rectangle. By the use of these rectangular features in combination with the conventional Haar-like features, we can select additional features which have been excluded in the conventional Viola-Jones algorithm where every features are the combination of contiguous bright and dark areas of an object. In doing so, we can enhance the performance of object detection without any computational overhead.
Keywords
Viola-Jones;
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