本文選題：嵌入式　切入點(diǎn)：視頻監(jiān)控　出處：《西安工業(yè)大學(xué)》2013年碩士論文　論文類型：學(xué)位論文

【摘要】：進(jìn)入信息時(shí)代以來(lái),隨著獲取信息方式不斷的進(jìn)步,人們對(duì)信息的完整性、準(zhǔn)確性和可靠性提出了更高的要求。而視頻監(jiān)控正是以其內(nèi)容豐富、直觀性強(qiáng)并且能夠完整的再現(xiàn)客觀信息等特點(diǎn)受到人們極大的關(guān)注。 論文首先對(duì)視頻監(jiān)控系統(tǒng)發(fā)展歷程進(jìn)行了詳細(xì)的介紹,然后在對(duì)整個(gè)系統(tǒng)的功能需求進(jìn)行分析的基礎(chǔ)之上,提出了幾套可用于實(shí)現(xiàn)遠(yuǎn)程監(jiān)控的方案,再對(duì)這幾套方案的優(yōu)缺點(diǎn)進(jìn)行總結(jié)和對(duì)比。由于網(wǎng)絡(luò)帶寬是有限的,在現(xiàn)有的研究當(dāng)中還存在因?yàn)閿?shù)據(jù)量太大而占用很多帶寬,造成了網(wǎng)絡(luò)延遲、堵塞,從而產(chǎn)生圖像失真、花屏、停頓等問(wèn)題。本文在現(xiàn)有的實(shí)驗(yàn)環(huán)境下,確定了一套最佳方案即以ARM9為核心處理器的實(shí)驗(yàn)平臺(tái)上搭建嵌入式web服務(wù)器,配以功能完善、資源豐富的嵌入式Linux操作系統(tǒng)作為軟件平臺(tái),使用傳輸速度快、成本低、通用性好的USB攝像頭完成對(duì)遠(yuǎn)端視頻圖像信息的采集、壓縮和網(wǎng)絡(luò)傳輸。并且在此過(guò)程中采用內(nèi)存映射法和減小圖像分辨率、改變像素色深、圖像傳輸幀率和圖像壓縮率等方式減小數(shù)據(jù)傳輸時(shí)占用的帶寬,解決了以上問(wèn)題。論文研究重點(diǎn)是通過(guò)采用交叉開發(fā)的模式,在宿主機(jī)上運(yùn)用虛擬機(jī)VMware安裝內(nèi)核為2.6.35的Fedora14操作系統(tǒng),使用串口和超級(jí)終端完成宿主機(jī)和目標(biāo)機(jī)之間的通信。軟件開發(fā)采用自下而上的順序,針對(duì)硬件平臺(tái)的架構(gòu),完成自舉程序Bootloader的開發(fā)和移植,對(duì)Linux系統(tǒng)內(nèi)核進(jìn)行裁剪、移植,制作YAFFS2根文件系統(tǒng),然后將其掛載。應(yīng)用程序的編寫在Vi編輯器中完成,最后利用HTML和JavaScript語(yǔ)言,編寫了視頻監(jiān)控系統(tǒng)的登錄界面,提高了系統(tǒng)整體的安全性。 整個(gè)系統(tǒng)采用了計(jì)算機(jī)網(wǎng)絡(luò)技術(shù)、操作系統(tǒng)技術(shù)和串口通信技術(shù),充分發(fā)揮嵌入式開發(fā)的潛能,實(shí)驗(yàn)結(jié)果表明用戶只要使用瀏覽器就可以監(jiān)控到遠(yuǎn)端的實(shí)時(shí)情況,能夠達(dá)到預(yù)期的效果。
[Abstract]:Since entering the information age, with the continuous progress of the way of obtaining information, people have put forward higher requirements for the integrity, accuracy and reliability of information, and video surveillance is rich in content. People pay great attention to the characteristics of visuality and the ability to reproduce objective information completely. Firstly, this paper introduces the development of video surveillance system in detail, and then, based on the analysis of the function requirement of the whole system, puts forward several schemes that can be used to realize remote monitoring. The advantages and disadvantages of these schemes are summarized and compared. Because the bandwidth of the network is limited, there is still a lot of bandwidth in the existing research because the amount of data is too large, which results in network delay, blockage and image distortion. In the existing experimental environment, this paper determines a set of best solution, that is, the embedded web server is built on the experimental platform with ARM9 as the core processor, and the function is perfect. As a software platform, the resource-rich embedded Linux operating system uses a USB camera with high transmission speed, low cost and good versatility to complete the collection of remote video image information. Compression and network transmission. In the process, the memory mapping method is used to reduce the image resolution, the pixel color depth is changed, the image transmission frame rate and the image compression rate are used to reduce the bandwidth of the data transmission. The key point of this paper is to install the Fedora14 operating system with 2.6.35 kernel on the host computer by using the mode of cross-development and using virtual machine (VMware). The serial port and super terminal are used to complete the communication between the host computer and the target computer. The software development adopts the bottom-up sequence, aiming at the architecture of the hardware platform, the development and transplantation of the bootstrap program Bootloader is completed, and the kernel of the Linux system is cut and transplanted. The YAFFS2 root file system is made, and the application program is written in the Vi editor. Finally, the login interface of the video surveillance system is written by using HTML and JavaScript language, which improves the security of the system as a whole. The whole system uses computer network technology, operating system technology and serial port communication technology to give full play to the potential of embedded development. The experimental results show that users can monitor the real-time situation of the remote end as long as they use the browser. Can achieve the desired results.
【學(xué)位授予單位】：西安工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TP277;TP368.1

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本文編號(hào)：1558369