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imho, the problem with your current approach is, that SVM1 does not know person 3 as a negative, though it should.

try to train SVM1 with features from class1 as positives, and features from all other classes as negatives. (all labeled -1 , irrespective of their real id, here they are just 'the negatives')

imho, the problem with your current approach is, that SVM1 does not know person 3 as a negative, though it should.

try to train SVM1 with features from class1 as positives, and features from all other classes as negatives. (all labeled -1 , irrespective of their real id, here they are just 'the negatives')

last but not least, if your features are long enough, consider using one multi-class svm, too.

imho, the problem with your current approach is, that SVM1 does not know person 3 as a negative, though it should.

try to train SVM1 with features from class1 as positives, and features from all other classes as negatives. (all labeled -1 , irrespective of their real id, here they are just 'the negatives')

last but not least, if your features are long enough, consider using one multi-class svm, too.too (instead of your current multi-svm-on-on-class-versus-all).

imho, the problem with your current approach is, that SVM1 does not know person 3 as a negative, though it should.

try to train SVM1 with features from class1 as positives, and features from all other classes as negatives. (all labeled -1 , irrespective of their real id, here they are just 'the negatives')

last but not least, if your features are long enough, consider using one multi-class svm, too (instead of your current multi-svm-on-on-class-versus-all).multi-svm-one-class-versus-all approach).