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Alternative TitleDesign and Implementation of A Wireless Video Sensor Network Prototype System
Thesis Advisor耿征
Degree Grantor中国科学院研究生院
Place of Conferral中国科学院自动化研究所
Degree Discipline计算机应用技术
Keyword无线视频传感网 Wifi H.264编码 高斯混合模型 运动目标检测 Wvsn Wifi H.264 Gaussian Mixture Models Moving Target Detection
Abstract无线视频传感网在传统的以传感器网络为基础的环境监测活动中引入了图像、视频等媒体,信息含量丰富,为实现细粒度、多维度、更全面的环境信息感知提供了数据支持。它关注于视频、图像等环境信息的采集、处理与传输,引入最为直观、丰富的可视化媒体信息,使得监测活动变得多功能化、智能化。使用视频技术构建传感器网络,设计出满足一般性研究需求的视频传感器节点,构建一个相对全面的原型实验平台,是迫切需要解决的问题,也是后续研究工作的基础,更是研究成果能够落实到实际系统测试的关键。 本文以无线视频传感网特征和普遍应用需求为基础,设计了基于高性能、低功耗嵌入式处理器的视频传感器节点,节点主要由嵌入式处理器、视频采集、WiFi无线通信模块三部分组成,支持CMOS和CCD两种类型的摄像头接口;节点平台运行嵌入式Linux操作系统,完成了基于H.264的视频编码压缩;构建了基于WiFi无线通信技术的传感器网络,设计了可选无线路由的数据传输方案;开发了基于FFmpeg的控制中心服务端,控制服务端实现了视频数据流的实时解码显示,并能够对视频传感器节点的工作参数进行配置;在视频传感器节点上编程实现了基于高斯混合模型的背景差分算法,实现了监测场景中运动目标的检测。最后对设计的原型系统从视频图像传输质量和运动目标检测效果两方面进行了功能和性能测试,测试结果表明本文设计的原型系统运行速度高、数据传输快、运动目标检测效果好,达到了预期目标。
Other AbstractWireless Video Sensor Network (WVSN) introduces informative media, such as image and video, into traditional sensor network based monitoring actives, which supplies rich information data support to comprehensive and accurate environmental monitoring. WVSN focuses on video, images and other environmental information collection, processing and transmission, the introduction of the intuitive, rich visual media information, making the monitoring activities have become multi-functional and intelligent. Building sensor network based on video technology, designing and developing the video sensor node that satisfied our requirements, and construct a relatively general prototype system, is the first step job for us. Adtionally, it’s the basis for our subsequent work, and is crucial for taking the research result into actual test. In this paper, firstly, the video senor nodes used of high performance and low power consumption embedded processor are developed. The nodes consist of three parts, which are embedded processor, video capture and wireless communication based on WiFi module, they support CMOS and CCD imager. Linux operating system runs on the nodes, and code the video date based on H.264 technology. Secondly, the sensor network based on WiFi technology is constructed, and an optional wireless router data transmission scheme is designed. Thirdly, a control service center is designed used of FFmpeg, which realized real time decode of video data stream, and control of sensor nodes. Additionally, a background difference algorithm was designed, which run on sensor nodes, and realized motion target detect of monitoring space. Finally, the prototype system was tested from quality of video transmission, and performance of motion target detecting aspects, the results demonstrate that the prototype system is of quick operation, fast transmission, and good performance of motion target detecting. Above all, the system meets the desired effects.
Other Identifier200828009029033
Document Type学位论文
Recommended Citation
GB/T 7714
赵学亮. 无线视频传感网原型系统设计与实现[D]. 中国科学院自动化研究所. 中国科学院研究生院,2011.
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