In this method, every two classes are processed by constructing a
child classifier of SVM, so N×(N−1)/2 child SVM classifiers are required. By combining all N×(N−1)/2 classifiers, SVM can determine
the class of pixel through the accumulation of predicting
classification. In the testing stage, for each testing sample is processed
by N×(N−1)/2 child classifiers of SVM, and the class
which appears maximum times are the predicted class label
using voting method