Abstract
Pedestrian detection in a single image takes more time than that in a video due to the requirement of scanning the whole image. In this paper, an improved pedestrian detection system based on region of interest (ROI) is proposed for single images. In the improved pedestrian detection system, principal component analysis (PCA) is introduced to improve the detection rate and accuracy of histogram of oriented gradients (HOG) based support vector machine (SVM) classifier for pedestrian detection. PCA eliminates the redundant HOG feature dimensions that have no contribution for the pedestrian classification. A novel ROI extraction method based on fuzzy C-means (FCM) clustering algorithm is used to select the regions that possibly contain pedestrians in a single image. ROI extraction reduces the number of detection windows, resulting in a significant reduction in detection time of a single image. Computer experiments show that the proposed pedestrian detection system can correctly detect the positions of pedestrians in single images in real time.
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