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A TUTORIAL ON SUPPORT VECTOR MACHINES FOR PATTERN RECOGNITION ASLI TAŞÇI Christopher J.C. Burges, Data Mining and Knowledge Discovery 2, 121-167, 1998
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OUTLINE Introduction Linear Support Vector Machines Nonlinear Support Vector Machines Limitations Conclusion
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INTRODUCTION Classification and Regression tool Supervised Learning Linear and non-linear classification performance
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APPLICATION AREAS Handwritten Digit Recognition Object Recognition Speaker Identification Text Categorization Face Detection in Images
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LINEAR SUPPORT VECTOR MACHINES Simplest Case: Seperable Data SVM Equaiton: Lagranian:
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KARUSH-KUHN-TUCKER CONDITIONS Constraint optimization
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NON-SEPERABLE CASE Introducing Slack variables for a feasible solution with linear SVM Lagranian for non-seperable data:
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NONLINEAR SUPPORT VECTOR MACHINES Mapping data to a feature space Example: Kernel Function:
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MERCER’S CONDITION Positive Semi-definite
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OPTIMIZATION PROBLEM Quadratic programming optimizaiton
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TRAINING Decomposition algorithms for larger problems Chunking method Osuna’s decomposition algorithm
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LIMITATIONS Choice of the Kernel Speed Size Discrete Data Multi-class classification
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PERFORMANCE OF SVM The Virtual Support Vector Method Training the system than creating a new data by distorting the resulting support vectors. The reduced set method Increases the speed of SVM
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CONCLUSION New approach to the problem of pattern recognition SVM training always find a global minimum Largely characterized by the choice of its Kernel
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