研究生: |
施佑駿 Yu-chun Shih |
---|---|
論文名稱: |
基於局部區域與多解析分析之人臉辨識系統 Face Recognition System Based on Local Regions and Multi-resolution Analysis |
指導教授: |
洪西進
Shi-jinn Horng |
口試委員: |
王獻
none 郭奕宏 none 林韋宏 none 林琮烈 none 顏成安 none |
學位類別: |
碩士 Master |
系所名稱: |
電資學院 - 資訊工程系 Department of Computer Science and Information Engineering |
論文出版年: | 2010 |
畢業學年度: | 98 |
語文別: | 中文 |
論文頁數: | 40 |
中文關鍵詞: | 局部二元圖形 、局部二元圖形-三正交平面 、距離轉換 |
外文關鍵詞: | LBP, LBP-TOP, Distance Transform |
相關次數: | 點閱:197 下載:4 |
分享至: |
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近年來生物資訊的應用蓬勃發展,其中利用生物特徵來做身分的識別更成為熱門的研究領域。人臉辨識因其取像容易且辨識過程為非接觸式,因此可應用的範圍廣泛並且成為生物特徵辨識的主流研究之一。然而在自然的環境下,人臉影像極易受到內在(表情、角度)及外在(光源)等因素的影響,這使得人臉辨識在生物特徵辨識領域中一直是個極具挑戰性的研究領域。
本論文主要利用局部區域以及多解析的分析方法來降低人臉影像因受局部破壞而導致辨識率下降的影響。特徵擷取以局部二元圖形(Local Binary Patterns)為基礎,並提出了利用LBP-TOP擷取出同時包含空間域以及解析域資訊的特徵。辨識的方法上以Distance Transform的距離計算取代了傳統以直方圖(histogram)為相似度計算的基礎,不僅提高了辨識的效果,在某些情況下它還具有降低特徵維度的作用。實驗的部分使用了ORL以及自行建置的人臉資料庫做為評測試驗,均獲得了不錯的效果。
In recent years, with the development of biometric applications, identity recognition using biometric information becomes the most hot research field. Face recognition has attracted more and more attention because of its enshrouded, non-contact properties and its wide range of applications, such as security monitoring and computer interaction. However, face recognition is still a most challenging research areas, because of the fact, in uncontrolled environments, the appearance of face will be deformed by variations of illumination, expression, pose and occlusion etc.
In this research, we mainly use the strategy of local region and multi-resolution analysis to reduce the impact caused by illumination, different expression and pose. The feature extracted method is based on Local Binary Patterns (LBP). Furthermore, we propose that using Local Binary Patterns-Three Orthogonal Planes (LBP-TOP) to extract the features that both include the spatial domain information and multi-scale information such that the extracted features are discriminative and robust. Feature matching method is replacing the similarity metric based on histogram with a local distance transform. Using local distance transform further improves the performance and, in some cases, it can reduce the dimension of feature.
The proposed method is evaluated with the ORL database and the self-built database. Experimental results demonstrate the good performance of our method.
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