Pedestrian detection in crowded scenes

Pao Yue-kong Library Electronic Theses Database

Pedestrian detection in crowded scenes


Author: Liu, Yifei
Title: Pedestrian detection in crowded scenes
Degree: M.Sc.
Year: 2012
Subject: Pedestrian traffic flow.
Pedestrians -- Mathematical models.
Image analysis -- Mathematical models.
Hong Kong Polytechnic University -- Dissertations
Department: Dept. of Electronic and Information Engineering
Pages: v, 74 p. : ill. ; 30 cm.
Language: English
InnoPac Record:
Abstract: Pedestrian detection has attracted a lot of attention recently, as it is important for applications such as home security, video surveillance, vehicle-assistance systems, crowd control, etc. In this thesis, we have studied different efficient features for representing pedestrians; these include histograms of oriented gradients (HoG), Haar-like features, region covariance, etc. Based on these features, classifiers or detectors can be designed to detect pedestrian objects. We have investigated the support vector machine (SVM) and the AdaBoost algorithm. SVM can achieve a high detection rate, but this method is more computational than the AdaBoost method. Therefore, we first implement and evaluate the performance of the SVM method and the AdaBoost method separately. Then, we propose to combine these two approaches so that the overall algorithm can achieve optimal efficiency as well as accuracy. In our method, we first apply the AdaBoost algorithm so that most of the non-pedestrian candidates can be removed efficiently. Then, the remaining possible candidates are verified by using the SVM method. We compare the three different approaches for pedestrian detection, and we found that our proposed combined method can achieve the best performance.

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