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Biologically Inspired Feature is one of efficient feature descriptions, and achieves great performance in some applications. This paper proposes an improved Biologically Inspired Feature(IBIF), and applies this feature into smile recognition. The main contributions of our paper are as follows. 1) a rotation-invariant BIF feature is proposed, which adjusts the RBF function of the traditional Biologically...
Recognizing smiles is of much importance for detecting happy moods. Gabor features are conventionally widely applied to facial expression recognition, but the number of Gabor features is usually too large. We proposed to use pyramid histogram of oriented gradients (PHOG) as the features extracted for smile recognition in this paper. The comparisons between the PHOG and Gabor features using a publicly...
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