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A Study on the Technology of Node Location in Video Sensor Networks

Author: QiKai
Tutor: ZhangGuoZuo
School: Hangzhou University of Electronic Science and Technology
Course: Applied Computer Technology
Keywords: Video sensor networks Node positioning technology Physical parameters Positioning accuracy
CLC: TN919.8
Type: Master's thesis
Year: 2009
Downloads: 56
Quote: 2
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Abstract


Video sensor networks (Video Sensor Networks) is a distributed sensing network consisting of a video sensor node with computing, storage and communication capabilities. Node localization in video sensor networks for target identification, monitoring, tracking, and the premise of a number of applications, but also to achieve self-configuring network topology, routing efficiency, reporting network covers the theoretical basis of the quality and other network functions. Therefore, the video sensor network node localization is one of the hot issues in the video sensor network research. This paper first introduces the content of the video sensor network node positioning technology background, significance and research progress. Around the visual sensor network node localization issues were discussed important technology node localization algorithm. In this paper, then a node localization algorithm based on the Camera Sensor two-dimensional coordinate system Firstly, the feasibility and scene description, determine the Camera Sensor of physical parameters, collected through the pinhole model unknown node within sight of three or above the anchor node of the image information, analyze the self-positioning of the imaging relationship between the image point and the object point to achieve the Camera Sensor unknown node, the final analysis of error localization algorithm based on the the Camera Sensor two-dimensional coordinate system. Video sensor networks, the unknown node and anchor node may not be in the two-dimensional coordinate system, but in a three-dimensional space, this paper put forward the localization algorithm based on the Camera Sensor three-dimensional coordinate system, video sensor nodes in three-dimensional space is broken down into three two-dimensional plane node localization algorithm based on the Camera Sensor of two-dimensional coordinate system to solve the three-dimensional coordinate system Camera Sensor nodes in each plane through positioning. Finally, to achieve improved sensor network hardware node platforms based CMUcam3 video. The platform can capture resolution of 352 × 288 (RGB) digital image information can be realized high-speed USB data transmission. In real-life scenarios, based on the Camera Sensor node localization algorithm by CMUcam3 node platform acquisition the anchor node within its field of view image information, the node localization task. The experiments show that the video sensor network hardware node platform CMUcam3 able to complete the image data acquisition, processing and other functions, 600 × 600cm experimental scene, based on the Camera Sensor of node localization algorithm by CMUcam3 node to complete the task of self-positioning, and the positioning accuracy of the algorithm. positioning error can reach cm level.

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