Fusion of Face and Voice Information in Person Identity Verification with Class-Imbalanced Dataset

碩士 === 國立臺灣大學 === 資訊工程學研究所 === 93 === Based on the idea of more information brings better performance, in this thesis we presents a confidence-level fusion method to combine face and voice information in biometric person identity verification. In systematic aspect, we develop an on-line verification...

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Main Authors: Hsien-Ting Cheng, 鄭先廷
Other Authors: Yi-Ping Huang
Format: Others
Language:en_US
Published: 2005
Online Access:http://ndltd.ncl.edu.tw/handle/72072557861966522849
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spelling ndltd-TW-093NTU053920932015-12-21T04:04:16Z http://ndltd.ncl.edu.tw/handle/72072557861966522849 Fusion of Face and Voice Information in Person Identity Verification with Class-Imbalanced Dataset 以不平衡資料集之分類技術進行結合人臉與語音之身分確認 Hsien-Ting Cheng 鄭先廷 碩士 國立臺灣大學 資訊工程學研究所 93 Based on the idea of more information brings better performance, in this thesis we presents a confidence-level fusion method to combine face and voice information in biometric person identity verification. In systematic aspect, we develop an on-line verification system with light-weight enrollment process, fraud precaution mechanism and an easy-to-use verification interface. While in algorithmic point of view, state-of-the art techniques are used to build the face and voice experts. More-over, a multi-face/single-sentence strategy is proposed to utilize all the available in-formation to reduce the cost of miss-detection and miss-registration of face, and support vector machine (SVM) is employed as the binary fusion classifier. In addition to individual experts and the fusion work, another important issue proposed in this thesis is learning from a class-imbalanced dataset. To train a good classifier, most of the time we use as many training data as possible. However in lots of fields involving classification jobs, training data is highly imbalanced distributed from class to class, ordinary classification algorithms will favor to the class which has more training samples. In the field of identity verification we are the first one that discover such important issue and try to handle it. Different level approaches are studied and implemented to reduce the influence of imbalanced dataset and lead to better performance. Yi-Ping Huang 洪ㄧ平 2005 學位論文 ; thesis 87 en_US
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description 碩士 === 國立臺灣大學 === 資訊工程學研究所 === 93 === Based on the idea of more information brings better performance, in this thesis we presents a confidence-level fusion method to combine face and voice information in biometric person identity verification. In systematic aspect, we develop an on-line verification system with light-weight enrollment process, fraud precaution mechanism and an easy-to-use verification interface. While in algorithmic point of view, state-of-the art techniques are used to build the face and voice experts. More-over, a multi-face/single-sentence strategy is proposed to utilize all the available in-formation to reduce the cost of miss-detection and miss-registration of face, and support vector machine (SVM) is employed as the binary fusion classifier. In addition to individual experts and the fusion work, another important issue proposed in this thesis is learning from a class-imbalanced dataset. To train a good classifier, most of the time we use as many training data as possible. However in lots of fields involving classification jobs, training data is highly imbalanced distributed from class to class, ordinary classification algorithms will favor to the class which has more training samples. In the field of identity verification we are the first one that discover such important issue and try to handle it. Different level approaches are studied and implemented to reduce the influence of imbalanced dataset and lead to better performance.
author2 Yi-Ping Huang
author_facet Yi-Ping Huang
Hsien-Ting Cheng
鄭先廷
author Hsien-Ting Cheng
鄭先廷
spellingShingle Hsien-Ting Cheng
鄭先廷
Fusion of Face and Voice Information in Person Identity Verification with Class-Imbalanced Dataset
author_sort Hsien-Ting Cheng
title Fusion of Face and Voice Information in Person Identity Verification with Class-Imbalanced Dataset
title_short Fusion of Face and Voice Information in Person Identity Verification with Class-Imbalanced Dataset
title_full Fusion of Face and Voice Information in Person Identity Verification with Class-Imbalanced Dataset
title_fullStr Fusion of Face and Voice Information in Person Identity Verification with Class-Imbalanced Dataset
title_full_unstemmed Fusion of Face and Voice Information in Person Identity Verification with Class-Imbalanced Dataset
title_sort fusion of face and voice information in person identity verification with class-imbalanced dataset
publishDate 2005
url http://ndltd.ncl.edu.tw/handle/72072557861966522849
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