【摘要】：視頻監(jiān)控系統(tǒng)在當(dāng)今社會(huì)各行各業(yè)得到了廣泛的應(yīng)用。尤其在敏感場(chǎng)合進(jìn)行實(shí)時(shí)、全天候、智能化的監(jiān)控對(duì)人民的生命、財(cái)產(chǎn)安全有著重要的意義。隨著嵌入式技術(shù)和互聯(lián)網(wǎng)技術(shù)的發(fā)展,具有網(wǎng)絡(luò)功能的嵌入式視頻監(jiān)控技術(shù)迅速發(fā)展起來。本文以嵌入式硬件平臺(tái)為基礎(chǔ),圍繞具有智能報(bào)警功能的網(wǎng)絡(luò)視頻監(jiān)控設(shè)備進(jìn)行研究。具體內(nèi)容如下： 1.設(shè)計(jì)了系統(tǒng)的總體框架,選用TQ2440開發(fā)板作為系統(tǒng)的硬件平臺(tái)。通過優(yōu)缺點(diǎn)的對(duì)比,選擇U-Boot、 Linux操作系統(tǒng)作為系統(tǒng)的軟件平臺(tái),并將其移植到TQ2440開發(fā)板中。制作了根文件系統(tǒng),添加了對(duì)yaffs2、 nfs文件系統(tǒng)的支持。 2.研究了Linux內(nèi)核自帶的V4L2視頻采集設(shè)備的驅(qū)動(dòng)框架,完成了視頻采集應(yīng)用程序。同時(shí)完成了基于socket套接字的視頻網(wǎng)絡(luò)傳輸程序,設(shè)計(jì)了多客戶端訪問的同步機(jī)制。 3.介紹了嵌入式web服務(wù)器的工作原理和流程,移植boa服務(wù)器到硬件平臺(tái),使用html超文本語言和css級(jí)聯(lián)樣式表完成web服務(wù)器主頁面的編寫。同時(shí)在服務(wù)器主頁面中嵌入基于JavaApplet技術(shù)的視頻接收顯示程序,實(shí)現(xiàn)了web客戶端與嵌入式平臺(tái)的視頻傳輸以及在web網(wǎng)頁中顯示視頻圖像的功能。 4.改進(jìn)了基于背景差法的運(yùn)動(dòng)目標(biāo)檢測(cè)算法,應(yīng)用OpenCV開源計(jì)算機(jī)視覺庫開發(fā)了運(yùn)動(dòng)目標(biāo)檢測(cè)應(yīng)用程序。移植Madplay播放器,完成了報(bào)警應(yīng)用程序。 5.對(duì)開發(fā)的整個(gè)系統(tǒng)進(jìn)行測(cè)試,測(cè)試了系統(tǒng)的可行性。 本文采用高性價(jià)比的嵌入式處理器作為硬件平臺(tái),實(shí)現(xiàn)了web遠(yuǎn)程視頻監(jiān)控系統(tǒng),并當(dāng)有運(yùn)動(dòng)目標(biāo)出現(xiàn)時(shí)自動(dòng)報(bào)警,具有一定的工程應(yīng)用價(jià)值。
[Abstract]:Video surveillance system has been widely used in various industries. Especially in sensitive situations, real-time, all-weather, intelligent monitoring of people's lives, property security has an important significance. With the development of embedded technology and Internet technology, embedded video surveillance technology with network function has developed rapidly. Based on the embedded hardware platform, this paper focuses on the network video surveillance equipment with intelligent alarm function. The specific contents are as follows: 1. The overall frame of the system is designed, and the TQ2440 development board is chosen as the hardware platform of the system. By comparing the advantages and disadvantages, U-Boot and Linux operating systems are selected as the software platform of the system and transplanted to the TQ2440 development board. The root file system is made and the support for yaffs2, nfs file system is added. 2. The driver framework of V4L2 video capture device based on Linux kernel is studied, and the video capture application program is completed. At the same time, the video network transmission program based on socket is completed, and the synchronization mechanism of multi-client access is designed. 3. This paper introduces the working principle and flow of embedded web server, transplanting boa server to hardware platform, using html hypertext language and css cascading style sheet to write the main page of web server. At the same time, the video receiving and displaying program based on JavaApplet technology is embedded in the main page of the server, which realizes the video transmission between the web client and the embedded platform, and the function of displaying the video image in the web page. 4. The algorithm of moving target detection based on background difference method is improved, and the application program of moving target detection is developed by using OpenCV open source computer vision library. Transplant Madplay player, completed the alarm application. 5. The whole system is tested and the feasibility of the system is tested. In this paper, the embedded processor with high performance-price ratio is used as the hardware platform to realize the remote video surveillance system of web, and it can alarm automatically when the moving target appears, so it has certain engineering application value.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TP368.1;TP277

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