tailieunhanh - Báo cáo hóa học: " A Human Body Analysis System"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: A Human Body Analysis System | Hindawi Publishing Corporation EURASIP Journal on Applied Signal Processing Volume 2006 Article iD61927 Pages 1-18 DOI ASP 2006 61927 A Human Body Analysis System Vincent Girondel Laurent Bonnaud and Alice Caplier Laboratoire des Images et des Signaux LIS INPG 38031 Grenoble France Received 20 July 2005 Revised 10 January 2006 Accepted 21 January 2006 Recommended for Publication by Irene Y. H. Gu This paper describes a system for human body analysis segmentation tracking face hands localisation posture recognition from a single view that is fast and completely automatic. The system first extracts low-level data and uses part of the data for high-level interpretation. It can detect and track several persons even if they merge or are completely occluded by another person from the camera s point of view. For the high-level interpretation step static posture recognition is performed using a belief theorybased classifier. The belief theory is considered here as a new approach for performing posture recognition and classification using imprecise and or conflicting data. Four different static postures are considered standing sitting squatting and lying. The aim of this paper is to give a global view and an evaluation of the performances of the entire system and to describe in detail each of its processing steps whereas our previous publications focused on a single part of the system. The efficiency and the limits of the system have been highlighted on a database of more than fifty video sequences where a dozen different individuals appear. This system allows real-time processing and aims at monitoring elderly people in video surveillance applications or at the mixing of real and virtual worlds in ambient intelligence systems. Copyright 2006 Hindawi Publishing Corporation. All rights reserved. 1. INTRODUCTION Human motion analysis is an important area of research in computer vision devoted to detecting tracking and understanding people s physical behaviour. This .