Analyzing Video Sequences of Multiple Humans: Tracking, Posture Estimation and Behavior Recognition

ISBN-13: 9781402070211 / Angielski / Twarda / 2002 / 138 str.

Jun Ohya; Akira Utsumi; Junji Yamato

Opis

This book is an excellent reference for both professional and academic researchers in the fields of computer vision and image processing. It will also be of interest to those working in video surveillance and monitoring, virtual reality, computer graphics, pattern recognition, telecommunication, human-computer interface, and general computer science.
Analyzing Video Sequences of Multiple Humans: Tracking, Posture Estimation and Behavior Recognition describes some computer vision-based methods that analyze video sequences of humans. More specifically, methods for tracking multiple humans in a scene, estimating postures of a human body in 3D in real-time, and recognizing a person's behavior (gestures or activities) are discussed. For the tracking algorithm, the authors developed a non-synchronous method that tracks multiple persons by exploiting a Kalman filter that is applied to multiple video sequences. For estimating postures, an algorithm is presented that locates the significant points which determine postures of a human body, in 3D in real-time. Human activities are recognized from a video sequence by the HMM (Hidden Markov Models)-based method that the authors pioneered. The effectiveness of the three methods is shown by experimental results.
The posture estimation method described in this book is a world-leading method in that it can estimate postures in 3D in real-time. As described in this book, the posture estimation method can be applied to avatar-based telecommunication systems, which require realistic, real-time reproduction of human images.
This book is also suitable for use in graduate classes in computer vision or image processing.

Spis treści

List of Figures. List of Tables. Preface. Contributing Authors. 1: Introduction; J. Ohya. 2: Tracking multiple persons from multiple camera images; A. Utsumi. 2.1. Overview. 2.2. Preparation. 2.3. Features of Multiple camera based tracking systems. 2.4. Algorithms for multiple-camera human tracking system. 2.5. Implementation. 2.6. Experiments. 2.7. Discussion and Conclusions 3: Posture estimation; J. Ohya. 3.1. Introduction. 3.2. A heuristic for estimating postures in 2D. 3.3. A heuristic method for estimating postures in 3D. 3.4. A non-heuristic method for estimating postures in 3D. 3.5. Applications to virtual environments. 3.6. Discussions and conclusions. 4: Recognizing human behavior using Hidden Markov Models; J. Yamato. 4.1. Background and overview. 4.2. Hidden Markov models. 4.3. Applying HMM to time-sequential images. 4.4. Experiments. 4.5. Category-separated vector quantization. 4.6. Applying image database search. 4.7. Discussions and conclusion. 5: Conclusion and Future Work; J. Ohya. Index.