研究生: |
左浩仁 How-Jeng Tzuo |
---|---|
論文名稱: |
具車牌辨識功能之四通道即時數位監視系統之研製 An Improved 4 Channel Real-Time Digital Video Recorder for Surveillance Applications: Automobile Plate Recognition & Video Multiplexer/De-multiplexer/Image Grabber Design and Simulation |
指導教授: |
鐘太郎
Tai-Lang Jong |
口試委員: | |
學位類別: |
碩士 Master |
系所名稱: |
電機資訊學院 - 電機工程學系 Department of Electrical Engineering |
論文出版年: | 2005 |
畢業學年度: | 93 |
語文別: | 中文 |
論文頁數: | 63 |
中文關鍵詞: | 車牌辨識 、數位監視系統 、硬體電路設計 、軟體程式設計 |
外文關鍵詞: | Automobile Plate Recognition, Digital Video Recorder, Hardware Design, Software Design |
相關次數: | 點閱:2 下載:0 |
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現今監視系統,分成PC base以及Standalone兩類,PC base的系統,如名稱上所表示的需要由PC作為平台,加上其他軟硬體,如視訊卡、監視器,來組成一監視系統,而Standalone的系統,顧名思義是為一個獨立的架構,系統本身擁有自己的處理器、記憶體、儲存裝置,可獨自運作,體積較小,適用於多數場所。而現今監視系統的趨勢,除體積小,可安裝在多數場所,兼具多通道的架構,以便節省監視系統之硬體外,還須附加針對特別場所及應用所需的額外功能,故本論文針對停車場監視管理的應用,提出一個以DSP及小波壓縮解壓縮晶片為主的多通道的監視系統,並設計額外的硬體與軟體功能,達到高解析度與即時的數位監視錄影,同時做車牌的辨識,來自動辨識停車場出入之車牌號碼,本論文專注在多通道監視系統數位視訊多工解多工及畫面捕捉硬體的設計以及車牌辨識部分的軟體設計,硬體部份包含視訊Mux電路,DeMux電路,將多通道的影像合一或將單通道影像分開至多個通道,以及補捉與傳送單一畫面影像資料給DSP的image capture電路,來將影像資料傳送至DSP,以便讓軟體部分做影像處理及車牌辨識,影像軟體部分有將影像優化,車牌擷取以及字母辨識的功能,另外如再加上額外的控制功能,預期可以發展成為智慧型的停車場監控系統,並且也可在NTSC信號中加入語音資料,日期資料,或特殊之資訊,做特殊之應用。因軟體部分皆為簡單之運算,亦可將軟體部份特別以硬體製作,以期可達到Standalone的監視系統 ,而無需連結到PC處理,以便適用於更多的場合。
Digital Video Recorder (DVR) system has found many applications nowadays. Besides traditional long hour and high resolution recordings, some special functions such as fast and intelligent retrieving, pattern recognition, etc., are expected of modern DVR. In this study, our goal is to design a multi-channel DVR system with automatic automobile plate recognition capability for use in a parking station surveillance and management environment. We focus our research on two main parts: hardware design of video Mux (multiplexer)/DeMux (demultiplexer) and image capture circuits used in the multi-channel DVR system, and software design of automobile plate recognition. The Mux and DeMux circuits can merge multi-channel digital video signal into one channel and split one channel into multi-channel digital video signals, respectively. The image capture hardware can capture image data of one frame and send it to DSP for further processing. All these three functions are designed and implemented in an FPGA chip. For the automobile plate recognition, we develop a simple software program that contains an image enhancement, an automobile plate ROI grab, and a characters recognition module to extract and identify the plate number in captured auto image. These functions can be easily augmented with other control functions to tailor the DVR system for various application purposes.
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