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研究生: 張涵彥
Chang, Han-Yen
論文名稱: 結合獨立成分分析及小波轉換於分組腦波中偵測癲癇
Combining ICA with Wavelet Transformation on Grouped EEG for Epileptic Seizure Detection
指導教授: 詹寶珠
Chung, Pau-Choo
學位類別: 碩士
Master
系所名稱: 電機資訊學院 - 電腦與通信工程研究所
Institute of Computer & Communication Engineering
論文出版年: 2010
畢業學年度: 98
語文別: 英文
論文頁數: 79
中文關鍵詞: 癲癇偵測獨立成分分析小波轉換
外文關鍵詞: Epileptic seizure detection, ICA, wavelet transformation
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  • 在這篇論文中我們提出了一個結合獨立成分分析(Independent Component Analysis)及小波轉換(Wavelet Transformation)於分組腦波中偵測癲癇的方法。首先,利用獨立成分分析來強化癲癇,接著以小波轉換分析並配合一個動態的門檻值來鑑定癲癇。為了評估我們提出的方法之效能,我們做了一連串的實驗來和我們提出的方法做比較,實驗結果顯示了我們提出的方法較其他的方法更能完整的找出癲癇。

    In this thesis, we propose a new scheme which combines ICA with wavelet transformation on grouped EEG signals for epileptic seizure detection. The Independent Component Analysis (ICA) is adopted to enhance epileptic seizure. Then, wavelet transformation is followed with a dynamic threshold for identifying the epileptic seizure location. A series of experiments has been conducted to evaluate the proposed approach. The experimental results show that the proposed method has a superior performance than other approaches.

    Chapter 1. Introduction………………………………………………………………………………………… 1 Chapter 2. Background……………………………………………………………………………………………… 4 2.1 Electroencephalography……………………………………………………………………… 4 2.2 Epileptic Seizure Description…………………………………………………… 5 Chapter 3. Related Work………………………………………………………………………………………… 6 3.1 Features and Classifiers………………………………………………………………… 6 3.1.1 Features…………………………………………………………………………………………… 6 3.1.2 Classifiers…………………………………………………………………………………… 8 3.2 Independent Component Analysis………………………………………………… 9 3.3 FastICA Algorithm…………………………………………………………………………………… 10 3.4 Daubechies Wavelet Transformation………………………………………… 13 Chapter 4. The Proposed Method……………………………………………………………………… 15 4.1 Preprocessing……………………………………………………………………………………………… 16 4.2 Feature Enhancement……………………………………………………………………………… 18 4.3 Time Frequency Analysis…………………………………………………………………… 19 4.4 Threshold Detection……………………………………………………………………………… 20 Chapter 5 Experimental Results……………………………………………………………………… 23 5.1 Comparison of the Feature Enhancement Methods………… 24 5.2 Comparison with Non-Grouped Signals…………………………………… 29 5.3 Comparison with Wavelet Transformation without ICA………………………………………………………………………………………………………………………… 48 5.4 Comparison with Some Features and Classifiers………… 59 Chapter 6 Conclusions……………………………………………………………………………………………… 72 References…………………………………………………………………………………………………………………………… 73

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