A Comparison of Methods for Multi-class Support Vector ...

III. A METHOD BY CONSIDERING ALL DATA AT ONCE AND A DECOMPOSITION IMPLEMENTATION In [25], [27], an approach for multi-class problems by solving one single opti-mization problem was proposed. The idea is similar to the one-against-all approach. It constructs ktwo-class rules where the mth function wT m ˚(x)+bseparates training

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