Please use this identifier to cite or link to this item: http://localhost:8080/xmlui/handle/123456789/1762
Title: BODY JOINT AND TRAJECTORY GUIDED 3-D DEEP CONVOLUTIONAL DESCRIPTORS FOR HUMAN ACTIVITY RECOGNITION
Other Titles: ICIDT 2019
Authors: Srilakshmi N
Radha N
Keywords: HAI
Body joints
Optical flow
JDD
JTDD
C3D
SVM
Issue Date: 11-Jul-2019
Publisher: In association with IBM,AICTE,CSIR with Sri Ramakrishna Engineering College, Coimbatore
Abstract: Human Activity Identification (HAI) in videos is one of the trendiest research fields in the computer visualization. Among various HAI techniques, Joints-pooled 3D-Deep convolutional Descriptors (JDD) have achieved effective performance by learning the body joint and capturing the spatiotemporal characteristics concurrently. However, the time consumption for estimating the locale of body joints by using large-scale dataset and computational cost of skeleton estimation algorithm were high. The recognition accuracy using traditional approaches need to be improved by considering both body joints and trajectory points together. Therefore, the key goal of this work is to improve the recognition accuracy using an optical flow integrated with a two-stream bilinear model, namely Joints and Trajectory-pooled 3D-Deep convolutional Descriptors (JTDD). In this model, an optical flow/trajectory point between video frames is also extracted at the body joint positions as input to the proposed JTDD. For this reason, two-streams of Convolutional 3D network (C3D) multiplied with the bilinear product is used for extracting the features, generating the joint descriptors for video sequences and capturing the spatiotemporal features. Then, the whole network is trained end-to-end based on the two-stream bilinear C3D model to obtain the video descriptors. Further, these video descriptors are classified by linear Support Vector Machine (SVM) to recognize human activities. Based on both body joints and trajectory points, action recognition is achieved efficiently. Finally, the recognition accuracy of the JTDD model and JDD model are compared
URI: http://localhost:8080/xmlui/handle/123456789/1762
Appears in Collections:International Conference

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