【正文】 內(nèi)江師范 學(xué)院本科畢業(yè)設(shè)計 i 目 錄 1 緒論 ............................................................................................................................ 1 前言 ..........................................................................................................................................1 車輛測速技術(shù)的發(fā)展 .......................................................................................................1 ．車輛測速技術(shù)簡介 .....................................................................................................1 ．國內(nèi)外典型的車輛識別測速系統(tǒng) .......................................................................2 ．車輛測速技術(shù)發(fā)展趨勢 ...........................................................................................2 車輛牌照識別系統(tǒng)簡介 ..................................................................................................3 ．車輛牌照自動識別系統(tǒng)概況 .................................................................................3 ．車輛牌照自動識別系統(tǒng)簡介 .................................................................................3 本論文研究內(nèi)容 .................................................................................................................5 ．本課題研究的系統(tǒng)簡介 ...........................................................................................5 ．技術(shù)難點 .........................................................................................................................5 2 視頻測速識別系統(tǒng) .................................................................................................... 6 視頻測速概況 ......................................................................................................................6 ..................................................................................................................6 ．光流方程法 ....................................................................................................................6 .......................................................................................................................7 視頻測速原理 ......................................................................................................................7 ．視頻測速原理 ...............................................................................................................7 ..................................................................................................................9 ..................................................................................................................9 視頻測速應(yīng)用 ................................................................................................................... 12 ．視頻測速流程圖 ....................................................................................................... 12 ．采用牌照邊框上下邊緣測速 .............................................................................. 12 ................................................................................. 13 ．動態(tài)閉值 ...................................................................................................................... 16 內(nèi)江師范 學(xué)院本科畢業(yè)設(shè)計 ii ．性能分析 ...................................................................................................................... 17 3 基于小波變換的字符識別快速算法 ....................................................................... 18 字符識別技術(shù) 概況 ......................................................................................................... 18 字符識別技術(shù)簡介 ..................................................................................................... 18 字符識別處理過程 ..................................................................................................... 18 字符識別常用算法 ..................................................................................................... 20 基于小波變換的字符識別快速算法 ...................................................................... 22 小波分析簡介 ............................................................................................................... 22 多分辨分析及其在本算法中的應(yīng)用 .................................................................. 22 快速算法的實現(xiàn) .......................................................................................................... 24 對字母“ H”的識別 ...................................................................................................... 26 對漢字“浙”的識別 .................................................................................................... 29 實驗結(jié)果 ............................................................................................................................. 32 4 總結(jié)與結(jié)論 .............................................................................................................. 33 參考文獻 ...................................................................................................................... 34 致謝 .............................................................................................................................. 35 內(nèi)江師范 學(xué)院本科畢業(yè)設(shè)計 iii 摘要 基于視頻和 DSP 車輛識別測速系統(tǒng)是智能交通系統(tǒng) (ITS)中的一個組成部分，它集牌照識別，車速檢測，流量監(jiān)控，費用收取等功能于一體，主要應(yīng)用于超速違章車輛監(jiān)控 。 本論文介紹了在 開發(fā)本系統(tǒng)中所做的一些工作，包括選定系統(tǒng)采用視頻測速+小波變換字符識別 +DSP 的方案 。重點研究了視頻測速所用的車輛精確定位算法，并進行了 測試 。探討了 適用于 DSP 平臺的基于小波變換的字符識別快速算法 ，并進行了性能測試 。論文中 將系統(tǒng)核心部分的字 符識別快速算法成功移植到 DSP平臺并進行了性能測試。 關(guān)鍵詞 ：車速檢測，牌照識別，視頻測速 內(nèi)江師范 學(xué)院本科畢業(yè)設(shè)計 iv Abstract As a Part of Intelligent Transport System Vehicle Recognition amp。Velocity Measurement System based on video and DSP integrates some useful function, such as vehicle license Plate recognition vehicle velocity measurement ,traffic, supervision ,toll, collection ,etc, and it 15 mainly used in supervision on over speed vehicles. This essay will introduce what has been done by the author in the development of the system， Including choosing video velocity measurement + character recognition algorithm based on Wavelet transform + DSP as the system solution 。development of vehicle accurate