Training Support Vector Machines: an Application to Face Detection

E Osuna,R Freund,F Girosi

Computer Vision and Pattern Recognition (CVPR)（1997）CCF A

MIT

被引用4154|浏览31

摘要

We investigate the application of Support Vector Machines (SVMs) in computer vision. SVM is a learning technique developed by V. Vapnik and his team (AT&T Bell Labs., 1985) that can be seen as a new method for training polynomial, neural network, or Radial Basis Functions classifiers. The decision surfaces are found by solving a linearly constrained quadratic programming problem. This optimization problem is challenging because the quadratic form is completely dense and the memory requirements grow with the square of the number of data points. We present a decomposition algorithm that guarantees global optimality, and can be used to train SVM's over very large data sets. The main idea behind the decomposition is the iterative solution of sub-problems and the evaluation of optimality conditions which are used both to generate improved iterative values, and also establish the stopping criteria for the algorithm. We present experimental results of our implementation of SVM, and demonstrate the feasibility of our approach on a face detection problem that involves a data set of 50,000 data points

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关键词

computer vision,face recognition,feedforward neural nets,quadratic programming,computer vision,decision surfaces,decomposition algorithm,face detection problem,global optimality,iterative values,learning technique,linearly constrained quadratic programming problem,neural network classifiers,optimality conditions,optimization problem,radial basis functions classifiers,stopping criteria,support vector machines,very large data sets