Multimedia Security

3	Improved Feature Vocabulary-Based Method for Image Categorization
Frank Y. Shih and Alexander Sheppard

CONTENTS

3.1    Introduction

3.2    Feature Extraction and Description

3.3    Object Categorization

3.4    Improved Method Based on Random Sampling

3.4.1    K-Means Clustering and Nearest Neighbor Quantization

3.4.2    Nearest-Neighbor Classification as a Benchmark Method

3.4.3    Linear Soft-Margin SVMs

3.4.4    Categorization with Multi-Class SVMs

3.5    Experimental Results

3.6    Conclusions

References

3.1    INTRODUCTION

With the enormous and growing amounts of captured digital images, there has been tremendous interest in image categorization. Image categorization aims to label or classify images into one of the predefined categories. ...