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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/65704

    Title: 自然場景中手持裝置的跑馬燈偵測及文句重構;Detecting and reconstructing marquee texts in natural scenes base on hand-held devices
    Authors: 廖文晧;Liao,Wen-Hao
    Contributors: 資訊工程學系
    Keywords: 跑馬燈;Marquee
    Date: 2014-07-29
    Issue Date: 2014-10-15 17:08:35 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 在科技發達的今日,已經有許多資訊傳播媒介已經不再是單純使用傳統文字傳遞訊息,而是改用更方便的裝置如電視牆及跑馬燈等。當人們面對這麼多資訊時難免有遺漏的狀況出現,而在這些遺漏的資訊中有許多資訊對我們來說可能是相當重要且緊急的。因此如何幫助人們在這資訊過於快速的時代中完整重現遺漏的資訊便成為一項重要的課題。
    ;Nowadays, traditional text-based message in conveying information can no longer meet the demand of information broadcasting. Instead, people convey important information via TV walls or marquees (i.e. scrolling texts) benefiting from the emerging of mature technology. Encountering such vast information conveyed by scrolling texts, people may miss some important information due to the inherent scrolling nature. How to help people catching the information hence becomes an important issue to be pursued.
    In this thesis, a novel system is proposed to extract texts displayed on an electronic marquee, especially when the input videos are captured using hand-held devices. The proposed system consists of two stages including detection stage and reconstruction stage. In the detection stage, the position of a marquee in each frame is located by utilizing the Gaussian Mixture Model and optical flow information. In the reconstruction stage, a LDP based text-filtering method is designed to retrieve complete text information.
    Experiments were conducted to verify the validity of the proposed system. Among them, two experiments were conducted to demonstrate the accuracy of the detected marquee region. As to another experiment, it was conducted to demonstrate the performance in the construction stage by counting how many words are correctly retrieved. Experimental results show that the proposed system works well in capturing scrolling texts both in day and night.
    Appears in Collections:[資訊工程研究所] 博碩士論文

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