在不同角度變化下以區域二元特徵為基礎之性別辨識

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范力中(Li-Chung Fan) 查詢紙本館藏

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資訊工程學系

論文名稱

在不同角度變化下以區域二元特徵為基礎之性別辨識
(View-insensitive Gender Recognition Using Local Binary Patterns)

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摘要(中)

性別辨識在近年電腦視覺的領域中，是一個重要且有趣的課題，若能在日常中應用性別辨識，生活將變得更簡單和安全。譬如：在洗手間外，若性別辨識系統察覺到有異性徘徊，便能通知警衛處理以及對裡面的使用者發出警訊，避免意外發生。此外，此系統也可提供行人數量統計系統更詳細的統計資訊。
傳統的性別辨識，較多都是以輪廓特徵為基礎當方法來辨識男女，例如： Gait Energy Image(GEI)，但是GEI除了在側面90度的辨識率有不錯的表現外，若視覺角度改變之後，會造成辨識率大幅度的降低。因此本論文提出了一個以紋理特徵為基礎的方法－local binary patterns (LBP)，討論男女在衣著上或是身型上的差異，是否能用LBP展現。
將視訊影片中，每一張影像前景的LBP histograms取出並串連成向量，之後再使用support vector machine (SVM)分類器辨識性別，經實驗驗證後，發現以LBP histograms做為特徵時，除了使用單張影像就能辨識出性別外，視角變化對辨識率幾乎沒有影響(view-insensitive)，而且取得LBP特徵的速度及方法既快速又簡單。因此，對性別辨識來說，是個十分有效率的方法。

摘要(英)

Recently, gender recognition is an important and interesting research issue in the area of pattern recognition. Its purpose is to recognize the gender of an unknown person which can be applied to ensure the secure activity in gender-restricted areas, such as lady’s room. Moreover, it can provide more detail statistical information for decision making in people counting application.
Most of traditional gender recognition methods use contour-based features, such as gait energy image (GEI), which perform well only in the view angle of 90 degree. To remove the restriction, we present a texture-based gender recognition method by using local binary patterns (LBP) in this thesis. The difference between the clothing and shapes of males and females can be successfully extracted and discriminated by LBP.
In our work, the LBP histograms are firstly extracted from the foreground of inputting video sequences and concatenate them into a single vector including the LBP histograms from the whole body, upper body without skin color, and lower body without skin color. The classifier that we adopt is support vector machine (SVM) in discriminating gender. Experimental results demonstrate that the proposed texture-based gender recognition method is more insensitive to view angles than GEI. The noticeable merit of our method is that we can classify human gender by using only one single image. Moreover, the extraction of LBP features needs much less time than the extraction of GEI features.

關鍵字(中)

★ 角度
★ 區域二元特徵
★ 性別辨識

關鍵字(英)

★ gender recognition
★ local binary patterns
★ view-insensitive

論文目次

摘要 i
Abstract ii
目錄 iii
圖目錄 iv
表目錄 vi
第一章緒論 1
1.1 研究動機 1
1.2 相關研究 3
1.3 系統架構 6
第二章性別辨識演算法 8
2.1 膚色區域偵測與去除 8
2.2 特徵擷取－利用區域二元特徵 11
2.3 分類方法－利用支持向量機 14
第三章實驗結果與討論 17
3.1 實驗資料庫 17
3.2 實驗結果 20
3.2.1 實驗ㄧ區域二元特徵向量維度對分類的影響 20
3.2.2 實驗二在單一角度下利用區域二元特徵辨識性別 23
3.2.3 實驗三改善區域二元特徵後在安全監控角度下辨識性別 26
3.2.4 實驗四 LBP在不同角度變化下的表現分析 31
3.3 實驗結果討論 40
3.3.1 延伸實驗結合LBP和GEI特徵的性別辨識 40
3.3.2 實驗總結 43
第四章結論與工作 45
4.1 結論 45
4.2 未來工作 46
參考文獻 47

參考文獻

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[14] Chih-Wei Hsu, Chih-Chung Chang, and Chih-Jen Lin, “A Practical Guide to Support Vector Classification”, National Taiwan University, Taipei, Taiwan, 2009.
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[16] G. Shakhnarovich, P.A. Viola, and B. Moghaddam, “A Unified Learning Framework for Real Time Face Detection and Classification”, IEEE International Conference on Automatic Face & Gesture Recognition, pp. 14-21, 2002.
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指導教授

范國清(Kuo-Chin Fan)

審核日期

2009-8-11

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