2014-12-12(Fri.)，AM 10:40 - 11:30 ，Speaker：林軒田 教授 (台灣大學資訊工程學系)
| Topic： | Cost-sensitive Multiclass Classification Using One-versus-one Comparisons |
| Speaker： | 林軒田 教授 (台灣大學資訊工程學系) |
| Time： | 2014/12/12 (Fri.) AM10:40 - 11:30 (Tea Time: AM10:20 - 10:40, Room 821) |
| Place： | GENⅢ 837 |
| Abstract： | Many real-world applications require varying costs for different types of mis-classification errors. Such a cost-sensitive classification setup can be very different from the regular classification one, especially in the multiclass case. Thus, traditional meta-algorithms for regular multiclass classification, such as the popular one-versus-one approach, may not always work well under the cost-sensitive classification setup. In this work, we extend the one-versus-one approach to the field of cost-sensitive classification. The extension is derived using a rigorous mathematical tool called the cost-transformation technique, and takes the original one-versus-one as a special case. Experimental results demonstrate that the proposed approach can achieve better performance in many cost-sensitive classification scenarios when compared with the original one-versus-one as well as existing cost-sensitive classification algorithms. |