Combining Classifiers in the ROC-space for Off-line Signature Verification
Дата
Авторы
Oliveira,Luiz
Justino,Edson
Sabourin,Robert
Bortolozzi,Flávio
Journal Title
Journal ISSN
Volume Title
Издатель
Journal of Universal Computer Science
Аннотация
Описание
In this work we present a strategy for off-line signature verification. It takes intoaccount a writer-independent model which reduces the pattern recognition problem to a 2-class problem, hence, makes it possible to build robust signature verification systems even when fewsignatures per writer are available. Receiver Operating Characteristic (ROC) curves are used to improve the performance of the proposed system . The contribution of this paper is two-fold. First of all, we analyze the impacts of choosing different fusion strategies to combine the partial decisions yielded by the SVM classifiers. Then ROC produced by different classifiers are combined using maximum likelihood analysis, producingan ROC combined classifier. Through comprehensive experiments on a database composed of 100 writers, we demonstrate that the ROC combined classifier based on the writer-independentapproach can reduce considerably false rejection rate while keeping false acceptance rates at acceptable levels.
Ключевые слова
signature verification , pattern recognition