Abstract
An effective and efficient visual word selection method based on Bag-of-Features(BoF),which can be applied to the pedestrian detection problem in a single image, is proposed in this paper. We first calculate the difference in the total appearance frequency of each visual word in pedestrian and non-pedestrian images. Visual words that exhibit greater absolute values are more efficient for pedestrian detection, and are thus selected. The effectiveness of the proposed method is validated by analyzing the distribution of selected feature points. Through this analysis, we find that discriminative feature points for pedestrian images are mainly located about the lower body, whereas those for non-pedestrian images are mainly located in background areas. In addition, the experiments show that the time required for detection can be reduced by approximately 50%, with negligible loss in detection accuracy, using the proposed method, even if only 40% of the visual words are selected.
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Zhang, X., Chen, G., Saruta, K., Terata, Y. (2014). A Simple Visual Words Selection Strategy for Pedestrian Detection. In: Bebis, G., et al. Advances in Visual Computing. ISVC 2014. Lecture Notes in Computer Science, vol 8887. Springer, Cham. https://doi.org/10.1007/978-3-319-14249-4_63
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DOI: https://doi.org/10.1007/978-3-319-14249-4_63
Publisher Name: Springer, Cham
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