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• Yamamoto, H
• Hyodo, K
• Wakamiya, N
• Murata, M
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• Yamamoto, H
• Hyodo, K
• Wakamiya, N
• Murata, M
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• Yamamoto, H
• Hyodo, K
• Wakamiya, N
• Murata, M

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Sensors 2010, 10(8), 7651-7673; doi:10.3390/s100807651

Article

A Reaction-Diffusion-Based Coding Rate Control Mechanism for Camera Sensor Networks

Hiroshi Yamamoto* , Katsuya Hyodo, Naoki Wakamiya and Masayuki Murata

Graduate School of Information Science and Technology, Osaka University, 1-5 Yamadaoka, Suita, Osaka 565-0871, Japan

* Author to whom correspondence should be addressed.

Received: 13 April 2010; in revised form: 28 June 2010 / Accepted: 19 July 2010 / Published: 13 August 2010

(This article belongs to the Section Physical Sensors)

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Abstract: A wireless camera sensor network is useful for surveillance and monitoring for its visibility and easy deployment. However, it suffers from the limited capacity of wireless communication and a network is easily overflown with a considerable amount of video traffic. In this paper, we propose an autonomous video coding rate control mechanism where each camera sensor node can autonomously determine its coding rate in accordance with the location and velocity of target objects. For this purpose, we adopted a biological model, i.e., reaction-diffusion model, inspired by the similarity of biological spatial patterns and the spatial distribution of video coding rate. Through simulation and practical experiments, we verify the effectiveness of our proposal.

Keywords: camera sensor network; coding rate control; reaction-diffusion model

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