Gait Recognition Based on Outermost Contour

• Main Authors: Lili Liu, Yilong Yin, Wei Qin, Ying Li
• Format: Article
• Language: English
• Published: Atlantis Press 2011-10-01
• Series: International Journal of Computational Intelligence Systems
• Subjects: Gait recognition; Outermost Contour; Principal Component Analysis; Multiple Discriminant Analysis; Back Propagation Neural Network; Support Vector Machine.
• Online Access: https://www.atlantis-press.com/article/2414.pdf

Gait recognition aims to identify people by the way they walk. In this paper, a simple but e ective gait recognition method based on Outermost Contour is proposed. For each gait image sequence, an adaptive silhouette extraction algorithm is firstly used to segment the frames of the sequence and a series of postprocessing is applied to obtain the normalized silhouette images with less noise. Then a novel feature extraction method based on Outermost Contour is performed. Principal Component Analysis (PCA) is adopted to reduce the dimensionality of the distance signals derived from the Outermost Contours of silhouette images. Then Multiple Discriminant Analysis (MDA) is used to optimize the separability of gait features belonging to di erent classes. Nearest Neighbor (NN) classifier and Nearest Neighbor classifier with respect to class Exemplars (ENN) are used to classify the final feature vectors produced by MDA. In order to verify the e ectiveness and robustness of our feature extraction algorithm, we also use two other classifiers: Backpropagation Neural Network (BPNN) and Support Vector Machine (SVM) for recognition. Experimental results on a gait database of 100 people show that the accuracy of using MDA, BPNN and SVM can achieve 97.67%, 94.33% and 94.67%, respectively.