Learning good prototypes for classification using filtering and abstraction of instances
We propose a framework for learning good prototypes, called prototype generation and filtering (PGF), by integrating the strength of instance-filtering and instance-abstraction techniques using two different integration methods. The two integration methods differ in the filtering granularity as well as the degree of coupling of the techniques. In order to characterize the behavior of the effect of integration, we categorize instance-filtering techniques into three kinds, namely, (1) removing border instances, (2) retaining border instance, (3) retaining center instances. The effect of using different kinds of filtering in different variants of our PGF framework are investigated. We have conducted experiments on 35 real-world benchmark data sets. We found that our PGF framework maintains or achieves better classification accuracy and gains a significant improvement in data reduction compared with pure filtering and pure abstraction techniques as well as KNN and C4.5.
prototype generation instance-based learning instance abstraction machine learning