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Face recognition using local patterns and relation learning

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Cấu trúc

  • Summary of Thesis

  • Certificate of Authorship of Thesis

  • Acknowledgements

  • List of Figures

  • List of Tables

  • List of Abbreviations

  • List of Publications

  • 1 Introduction

    • 1.1 Face Recognition

    • 1.2 Challenges to Face Recognition

    • 1.3 Current Approaches to Face Recognition

    • 1.4 Motivation

    • 1.5 Problem Statement

    • 1.6 Thesis Contribution

    • 1.7 Thesis Organization

  • 2 Literature Review

    • 2.1 Literatures on Facial Feature Representation

      • 2.1.1 Data Independent Feature Extraction

      • 2.1.2 Data Dependent Feature Extraction

      • 2.1.3 Mixed Feature Extraction

    • 2.2 Literatures on Face Detection

    • 2.3 Literatures on Face Recognition

      • 2.3.1 General Face Recognition System

      • 2.3.2 Unsupervised Distance Learning-Based Approaches

      • 2.3.3 Supervised Distance Learning-Based Approaches

      • 2.3.4 Support Vector Machines-Based Approaches

      • 2.3.5 Approaches for Face Recognition across Pose and Illumination

    • 2.4 Summary

  • 3 Facial Representation

    • 3.1 Introduction

    • 3.2 Pixel-based Facial Features

    • 3.3 Fourier-Based Facial Features

    • 3.4 Cosine-Based Facial Features

    • 3.5 Gabor-Based Facial Features

    • 3.6 Haar-like Features

    • 3.7 Local Pattern-Based Facial Features

      • 3.7.1 Local Binary Patterns

      • 3.7.2 Generic Local Binary Patterns

      • 3.7.3 Local Ternary Patterns

      • 3.7.4 Invariants of Local Binary Patterns

      • 3.7.5 Multi-scale Local Binary Patterns

      • 3.7.6 Multi-Scale Block Local Binary Patterns

    • 3.8 Complex Facial Representations

    • 3.9 My Proposed Robust Multi-Scale Block Local Binary Patterns

    • 3.10 My Proposed Compact Histogram Representation

    • 3.11 Summary

  • 4 Face Detection

    • 4.1 Description of Face Detection System

    • 4.2 Neural Networks

      • 4.2.1 Overview

      • 4.2.2 Neural Network-Based Classification

      • 4.2.3 Neural Network-Based Face Detection

    • 4.3 AdaBoost Algorithm

      • 4.3.1 AdaBoost-Based Face Detection

      • 4.3.2 Face Detection Using Cascade Structure of Boosted Classifiers

    • 4.4 My Proposed Hybrid Approach for Face Detection

      • 4.4.1 Structure of Hybrid Face Detector

      • 4.4.2 Applying to Face Detector

    • 4.5 Summary

  • 5 Distance Learning for Face Recognition

    • 5.1 Description of Face Recognition System

    • 5.2 Face Recognition Using Principal Component Analysis

    • 5.3 Face Recognition Using Probabilistic PCA

    • 5.4 Face Recognition Using Two-Dimensional PCA

    • 5.5 Face Recognition Using LDA

    • 5.6 Proposed Face Recognition Using Bayesian Learning

      • 5.6.1 Bayesian Decision Theory

      • 5.6.2 Bayesian Learning

      • 5.6.3 Extended Bayesian Learning

    • 5.7 My Proposed Face Recognition Using LBP

      • 5.7.1 LBP-Based Face Recognition Framework

      • 5.7.2 Distances to Measure Similarities of Histograms

      • 5.7.3 Feature Transformation

      • 5.7.4 Implementation of Computing Similarity/Dissimilarity Scores

    • 5.8 Summary

  • 6 Relation Learning for Face Recognition

    • 6.1 Introduction

    • 6.2 Face Recognition Using Support Vector Machine

      • 6.2.1 Support Vector Machine

      • 6.2.2 SVM-Based Face Recognition

    • 6.3 Proposed Face Recognition Using Relation Learning

      • 6.3.1 Theory of Relation Learning

      • 6.3.2 Algorithm of Relation Learning

      • 6.3.3 Relation Learning-Based Face Recognition

    • 6.4 Summary

  • 7 Experiments

    • 7.1 Introduction

    • 7.2 Databases

    • 7.3 Performance Measures

      • 7.3.1 Introduction to Evaluation Protocol

      • 7.3.2 Performance Measures in Face recognition

      • 7.3.3 Testing Protocol

      • 7.3.4 Performance Measures in Face Detection

    • 7.4 Experiments on Face Detection

      • 7.4.1 AdaBoost and Neural Network-Based Face Detection System

      • 7.4.2 Hybrid Models of AdaBoost and Neural Network

    • 7.5 Experiments on Gender Classification

      • 7.5.1 Database and Experiment Setup

      • 7.5.2 Comparisons of Facial Representation Methods

      • 7.5.3 Comparisons of Dimension Reduction Methods

      • 7.5.4 Comparisons of Classification Methods

    • 7.6 Experiments on Face Recognition

      • 7.6.1 Global and Local Facial Representations

      • 7.6.2 Gabor-Based Facial Representations

      • 7.6.3 Local Pattern-Based Facial Representations

      • 7.6.4 Complex Facial Representation

      • 7.6.5 Fusion Classifiers

      • 7.6.6 Distance Learning

      • 7.6.7 Extended Bayesian Learning

      • 7.6.8 Relation Learning

    • 7.7 Summary

  • 8 Conclusions and Suggestions for Future Work

    • 8.1 Conclusions

    • 8.2 Future Work

  • Bibliography

Nội dung

A thesis submitted for the degree of Doctor of Philosophy at The University of Canberra FACE RECOGNITION USING LOCAL PATTERNS AND RELATION LEARNING Len Bui January, 2013 Summary of Thesis The study area of this thesis is face recognition, one of the important fields in computer vision Although face recognition has recently achieved many advances, the process is still not able to meet the accuracy requirements of many applications that are affected by variations in pose and illumination The aim of this thesis is to develop a more advanced approach that can handle the challenges in pose and illumination in face recognition The thesis proposes Robust Multi-Scale Block Local Binary Pattern as a new facial representation that is sufficiently robust to accept variations in pose and illumination and yet contains rich discriminative information The thesis also investigates the metrics or scores in general used to measure similarity/dissimilarity in face recognition and contributes two novel classification methods, namely Extended Bayesian Learning and Relation Learning, to overcome difficulties such as the Small-Sample-Size problem and gain good performance for face recognition systems iii iv Certificate of Authorship of Thesis Except where clearly acknowledged in footnotes, quotations and the bibliography, I certify that I am the sole author of the thesis submitted today entitled Face Recognition Using Local Patterns and Relation Learning I further certify that to the best of my knowledge the thesis contains no material previously published or written by another person except where due reference is made in the text of the thesis The material in the thesis has not been the basis of an award of any other degree or diploma except where due reference is made in the text of the thesis The thesis complies with University requirements for a thesis as set out in Higher Degree by Research Examination Policy, Schedule Two (S2) Refer to http://www.canberra.edu.au/research/hdr-policy-and-procedures ———————————————————————————————Signature of Candidate ———————————————————————————————Signature of chair of the supervisory panel ——————————————— Date v vi Acknowledgements First and foremost, I would like to thank my primary supervisor, Associate Professor Dat Tran, for his enormous support during my study at University of Canberra, in a variety of ways, both academic and personal I would also like to thank my co-supervisors, Professor Xu Huang and Associate Professor Girija Chetty, for their consistent encouragement and support on my research My four-and-half-year research at the Faculty of Information Sciences and Engineering has been priceless The facilities and environment for studying are excellent A special thanks to the Faculty and my friends for their support and discussions I would like to thank Vietnam Ministry of Education and Training for granting me the scholarship to study at University of Canberra My study could have not taken without the endless love, support of my family, father, sisters, brothers and nephews This thesis is dedicated to my beloved mother vii viii Contents Contents Summary of Thesis iii Certificate of Authorship of Thesis v Acknowledgements vii List of Figures xiii List of Tables xix List of Abbreviations xxi List of Publications xxiii Introduction 1.1 Face Recognition 1.2 Challenges to Face Recognition 1.3 Current Approaches to Face Recognition 1.4 Motivation 1.5 Problem Statement 1.6 Thesis Contribution 1.7 Thesis Organization 12 Literature Review 2.1 15 Literatures on Facial Feature Representation 17 2.1.1 Data Independent Feature Extraction 17 2.1.2 Data Dependent Feature Extraction 20 2.1.3 Mixed Feature Extraction 23 2.2 Literatures on Face Detection 24 2.3 Literatures on Face Recognition 27 ix Contents 2.4 2.3.1 General Face Recognition System 27 2.3.2 Unsupervised Distance Learning-Based Approaches 27 2.3.3 Supervised Distance Learning-Based Approaches 29 2.3.4 Support Vector Machines-Based Approaches 30 2.3.5 Approaches for Face Recognition across Pose and Illumination 30 Summary 33 Facial Representation 35 3.1 Introduction 36 3.2 Pixel-based Facial Features 36 3.3 Fourier-Based Facial Features 37 3.4 Cosine-Based Facial Features 38 3.5 Gabor-Based Facial Features 40 3.6 Haar-like Features 43 3.7 Local Pattern-Based Facial Features 46 3.7.1 Local Binary Patterns 46 3.7.2 Generic Local Binary Patterns 49 3.7.3 Local Ternary Patterns 3.7.4 Invariants of Local Binary Patterns 51 3.7.5 Multi-scale Local Binary Patterns 52 3.7.6 Multi-Scale Block Local Binary Patterns 52 50 3.8 Complex Facial Representations 53 3.9 My Proposed Robust Multi-Scale Block Local Binary Patterns 54 3.10 My Proposed Compact Histogram Representation 55 3.11 Summary 56 Face Detection 57 4.1 Description of Face Detection System 58 4.2 Neural Networks 59 4.3 4.2.1 Overview 59 4.2.2 Neural Network-Based Classification 60 4.2.3 Neural Network-Based Face Detection 61 AdaBoost Algorithm 64 4.3.1 AdaBoost-Based Face Detection 65 x Chapter Conclusions and Suggestions for Future Work Chapter Conclusions and Suggestions for Future Work 155 Chapter Conclusions and Suggestions for Future Work 8.1 Conclusions In brief, face recognition is one of the major biometric techniques Although knowledge of face recognition has recently achieved many advances, it is still not sufficient to meet the accuracy requirements of many applications operating under significant variations of illumination and pose As a result of this study, I would draw the following conclusions Facial representations The difficulties in face recognition that are caused by many factors continue to be a challenge for any face recognition algorithm The difficulties faced include a large variability in facial appearance of the same person, the high dimensionality of data and small sample size, and high complex and nonlinear manifolds Local patterns including Local Binary Pattern and its variants provide the current best facial representations for face recognition systems because they are invariant against monotonic gray level change Second, its computation is rather simple, making image analysis possible in challenging real-time conditions Gabor-based facial representations and their combination with local patterns provide strongly fused representations better for each individual representation They are complimentary in the sense that LBP captures small appearance details while Gabor features encode facial shape over a broader range of scales Face detection Most current face detection algorithms satisfy the requirements of practical applications A set of Haar-like and extended Haar-like features are the best feature representations for face detection Boosting-based face detection algorithms are the most effective for real-time face detectors and are comparable to Neural Network-based algorithms Especially, AdaBoost learning can efficiently choose the best subset from a huge set of features and build a strong nonlinear detector The cascade structure significantly improves the performance of the face detector in the detection speed, with only a little decrease in detection rate 156 Chapter Conclusions and Suggestions for Future Work A hybrid model based on the combination of AdaBoost and Neural Network can improve both detection speed and detection rate Face recognition Most current face recognition algorithms can satisfy the requirements of practical applications under controlled conditions Because the nature of face recognition is a problem of a large number of classes, almost all face recognition uses distances between images to measure their similarity In other words, face recognition, in practice, is a classification problem in that the number of classes is very large while the number of samples available for each class is very limited Therefore, most face recognition systems use a Nearest Neighbor rule to make the decision or, distance-based classification Relation learning derived from a Support Vector Machine framework can efficiently handle the problem of small sample size in face recognition 8.2 Future Work One of major issues for facial representation based on the local binary patterns is that a small change in an input image could cause a large change in the output or pattern, so that the method may work improperly for images with noise or flat areas In the future, we need to combine with other methods to limit the limitation Although relation learning can handle small sample size problems in face recognition, its performance in recognition rate needs to improve by combining with other classification methods that include a data reduction method The proposed relation learning could be applied to other biometric applications such as fingerprinting, and iris and speech recognition The proposed relation learning approach is to deal with the insufficient data problem It defines a relation between two objects and applies this definition to determine all possible relations in the training data set The relation between two objects is used to measure the similarity between them Instead of considering objects in their data space as other methods do, a relation space is used The proposed hybrid model based on AdaBoost and Neural Network and the proposed Baysian learning technique could be applied to learning problems for other 157 Chapter Conclusions and Suggestions for Future Work biometric applications We can also combine the proposed hybrid model with other classification methods that have the ability to reject false negative patterns correctly and efficiently in order to improve the performance The proposed hybrid model will be able to achieve minimum computation time in biometric applications 158 Bibliography Bibliography Ahonen, T., Hadid, A., and Pietikainen, M (2006) Face description with local binary patterns: Application to face recognition Pattern Analysis and Machine Intelligence, IEEE Transactions on, 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methods using Local Patterns. .. Huang, X., and Chetty, G (2011c) A new approach to bayesian method for face recognition In practice, 1:3 Bui, L., Tran, D., Huang, X., and Chetty, G (2011d) Novel metrics for face recognition using local binary patterns Knowledge-Based and Intelligent Information and Engineering Systems (KES), pages 436–445 Bui, L., Tran, D., Huang, X., and Chetty, G (2011e) Relation learning- a new approach to face recognition. .. 5.3 Face Recognition Using Probabilistic PCA 78 5.4 Face Recognition Using Two-Dimensional PCA 80 5.5 Face Recognition Using LDA 81 5.6 Proposed Face Recognition Using Bayesian Learning 82 5.7 5.8 70 5.6.1 Bayesian Decision Theory 82 5.6.2 Bayesian Learning 85 5.6.3 Extended Bayesian Learning. .. the input to a face recognition system Typical examples are Eigenface (Turk and Pentland, 1991b) using Principal Component Analysis, Probabilistic Eigenface (Moghaddam et al., 2000) using Bayesian learning, Fisherface (Belhumeur et al., 1997) using Fisher Linear Discriminant Analysis and Bartlett (2001) using Independent Component Analysis Although their systems are not as complicated and often have... estimate of the location and scale of a face It also includes face land marking to localize facial landmarks e.g eyes, nose, mouth and facial outline 3 Chapter 1 Introduction A face normalization module will normalize the resulting face geometrically and photometrically Such is definitely necessary because most the current face recognition systems, in reality, are expected to deal with face images in varying... 4.4 4.5 Face Detection Using Cascade Structure of Boosted Classifiers 66 My Proposed Hybrid Approach for Face Detection 67 4.4.1 Structure of Hybrid Face Detector 67 4.4.2 Applying to Face Detector 68 Summary 68 5 Distance Learning for Face Recognition 69 5.1 Description of Face Recognition System 5.2 Face Recognition Using. .. A typical face recognition system (shown in Figure 1.2) consists of four modules: face localization, face normalization, feature extraction and feature matching Figure 1.2: A typical face recognition system A face localization module aims to extract facial regions from the image background In the case of video clips, the detected faces may need to be tracked across multiple frames using a face- tracking... seconds)139 7.25 Results of face recognition for three facial representations on FERET 140 7.26 Results of face recognition of fusion classifiers on ORL 141 7.27 Results of face recognition of fusion classifiers on FERET 141 7.28 Results of face recognition of fusion classifiers on ORL 142 7.29 Results of face recognition using fusion classifiers on Extended Yale Face Database ... as Local Binary Pattern (Ahonen et al., 2004, 2006; Ahonen and Pietikäinen, 2009) have been widely used in face recognition and detection due to their good performance and relatively simple and efficient computation tasks 1.4 Motivation Face recognition is the major biometric technique in use It is more natural and non-intrusive than the other biometric techniques such as fingerprinting, and iris and

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