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車牌識別技術開啟智慧交通的天眼通

來源: 百度百科 時間:2016年12月23日
  車牌識別技術作為開啟智慧交通的天眼通受到智能交通及政府的高度重視,對于緩解交通管理壓力,特別是靜態交通起著十分重要的作用。同時也是作為21世紀城市交通信息高速公路建設的核心課題,在很大程度上推動了智能交通的快速發展。

  那么,車牌識別在智能交通中究竟扮演者怎樣的角色呢?

  在智能交通應用中,除了提取車輛流量等信息外,如何便捷地確認車輛身份也很重要。在眾多車輛身份確認方式中,車牌識別以其在應用中的卓越表現而獲得業界的普遍認可。

  一起來看看車牌識別的工作原理:

  車牌識別是利用采集車輛的動態視頻或靜態圖像進行車牌號碼、車牌顏色的自動模式識別技術。技術的核心包括車牌定位算法、車牌字符分割算法和光學字符識別算法等。一個完整的車牌識別系統應包括車輛檢測、圖像采集、車牌識別等幾部分。當車輛檢測部分檢測到車輛到達時觸發圖像采集單元,采集當前的視頻圖像。車牌識別單元對圖像進行處理,定位出車牌位置,再將車牌中的字符分割出來進行識別,較后組成車牌號碼輸出。

  車牌作為車輛身份的標識通常具有唯一性,世界上沒有兩輛車使用完全相同的合法車牌。雖然在國外存在兩輛車使用相同車牌號碼的情況,但必須車牌顏色各異。

  作為車輛識別標識,車牌有著十分規范的編碼方式,給識別提供了便利條件。對每一類型的車牌,其車牌格式類型都是唯一的,如在中國的普通民用車中,車牌的第一個字符都為漢字,且為車輛所屬省份的簡稱;第二個字符為字母,且不同字母代表不同的城市。不同類的車輛使用何種顏色的車牌也有著嚴格的規定,如軍警類特種車輛均使用白色車牌,民用轎車均使用藍色車牌等等。

  車牌的安裝位置相對固定,均安裝在車輛的較前端和較后端的固定位置,十分顯眼,亦方便拍照采集。

  根據車牌的唯一性,車牌識別技術將廣泛的應用于電子停車收費系統中、高速公路收費站及各停車收費小區中,停車場及小區出入口應用車牌識別技術主要用于記錄車輛的牌照號碼、車牌顏色、出入時間,實現車輛的自動管理,以便節省人力、提高效率。

  作為智能化交通管理體系中的重要核心技術之一,車牌識別將作為開啟智慧交通的天眼通,為停車場和各大停車收費站服務。使人們的停車生活更加便捷、有序。

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