We also compare ABTSVM with other common multi-SVMs, such
as one-against-all SVM (1-a-a SVM), one-against-one SVM (1-a-1
SVM), decision directed acyclic graph SVM (DDAG SVM), slant binary
SVM (SBSVM), and balanced binary tree (BBTSVM). Table 2 shows the
accuracy statistics of different algorithms.