發(fā)布時(shí)間：2018-12-11 19:10

【摘要】：隨著科學(xué)技術(shù)的發(fā)展，視頻監(jiān)控在很多領(lǐng)域得到廣泛的應(yīng)用，大體上經(jīng)歷了三個(gè)階段：模擬監(jiān)控、數(shù)字監(jiān)控以及現(xiàn)如今的網(wǎng)絡(luò)視頻監(jiān)控。所涉及的技術(shù)也在不斷的革新，監(jiān)控也逐漸向智能化發(fā)展。本論文首先對現(xiàn)有的網(wǎng)絡(luò)視頻監(jiān)控技術(shù)進(jìn)行了分析，運(yùn)用了將嵌入式系統(tǒng)與網(wǎng)絡(luò)技術(shù)相結(jié)合的思想，設(shè)計(jì)了一種基于ARM11處理器和嵌入式Linux系統(tǒng)的網(wǎng)絡(luò)視頻監(jiān)控系統(tǒng)，主要完成了以下工作內(nèi)容： ⑴采用交叉方式來進(jìn)行網(wǎng)絡(luò)視頻監(jiān)控系統(tǒng)的開發(fā)，移植了嵌入式Linux系統(tǒng)到ARM11處理器上。嵌入式Linux系統(tǒng)具有開源、穩(wěn)定等優(yōu)點(diǎn)。本文所設(shè)計(jì)的整個(gè)視頻監(jiān)控系統(tǒng)是采用B/S模式,因此在目標(biāo)板的Linux系統(tǒng)上搭建了一款輕量級的Web服務(wù)器Boa，實(shí)現(xiàn)了對客戶端的請求進(jìn)行應(yīng)答。該項(xiàng)工作主要為以下所要設(shè)計(jì)的網(wǎng)絡(luò)視頻監(jiān)控系統(tǒng)的運(yùn)行提供一個(gè)穩(wěn)定的運(yùn)行環(huán)境。 ⑵在Linux操作系統(tǒng)環(huán)境下進(jìn)行網(wǎng)絡(luò)視頻應(yīng)用程序的開發(fā)需要用到V4L2內(nèi)核驅(qū)動(dòng)接口，因此在視頻監(jiān)控現(xiàn)場采集端選用的是支持V4L2接口的USB攝像頭，該攝像頭可以對采集到的視頻圖像數(shù)據(jù)進(jìn)行簡單的預(yù)處理，然后送給MJPG-streamer應(yīng)用程序進(jìn)行壓縮編碼。MJPG-streamer程序可以從單一的輸入組件獲得視頻數(shù)據(jù)，并輸出到文件夾或者網(wǎng)絡(luò)等多個(gè)組件。對圖像處理過程包括對其進(jìn)行DCT變換和jpeg編碼，進(jìn)而通過UDP協(xié)議實(shí)現(xiàn)對視頻數(shù)據(jù)進(jìn)行套接字編程，，完成視頻數(shù)據(jù)的網(wǎng)絡(luò)傳輸。 ⑶采用移動(dòng)客戶端和固定客戶端通過Web瀏覽器對系統(tǒng)進(jìn)行測試，在Ubuntu中使用minicom軟件對該系統(tǒng)運(yùn)行時(shí)所消耗內(nèi)存和CPU進(jìn)行監(jiān)控。結(jié)果表明所占用內(nèi)存和CPU較少，系統(tǒng)運(yùn)行穩(wěn)定可靠，客戶端獲取的實(shí)時(shí)視頻圖像清晰流暢，無失真和抖動(dòng)現(xiàn)象，取得了較好的實(shí)時(shí)視頻監(jiān)控效果。
[Abstract]:With the development of science and technology, video surveillance has been widely used in many fields. It has experienced three stages: analog surveillance, digital surveillance and network video surveillance. The technology involved is also constantly innovating and monitoring is gradually developing to intelligence. In this paper, the existing network video surveillance technology is analyzed, and a network video monitoring system based on ARM11 processor and embedded Linux system is designed by using the idea of combining embedded system with network technology. The main contents are as follows: 1 the embedded Linux system is transplanted to the ARM11 processor by using the cross mode to develop the network video surveillance system. Embedded Linux system has the advantages of open source and stability. The whole video surveillance system designed in this paper is based on B / S mode, so a lightweight Web server Boa, is built on the target board Linux system to answer the request of the client. This work provides a stable running environment for the following network video surveillance system. 2 in the environment of Linux operating system, the development of network video application needs to use the V4L2 kernel driver interface, so the USB camera which supports the V4L2 interface is selected in the video surveillance scene collection terminal. The camera can simply preprocess the collected video image data and send it to the MJPG-streamer application for compression and coding. The MJPG-streamer program can obtain video data from a single input component. And output to the folder or network and other components. The process of image processing includes DCT transform and jpeg coding, and then the socket programming of video data is realized through UDP protocol, and the network transmission of video data is completed. (3) Mobile client and fixed client are used to test the system through Web browser, and minicom software is used in Ubuntu to monitor the memory consumption and CPU consumption when the system is running. The results show that the system occupies less memory and CPU, the system runs stably and reliably, the real-time video images obtained by the client are clear and smooth, without distortion and jitter, and a good real-time video monitoring effect is achieved.
【學(xué)位授予單位】：江西理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN948.6

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