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| Presentation | 2014-11-18 15:00 [Poster Presentation] Coping with Class Balance Change in Classification : Class-Prior Estimation with Energy Distance Hideko Kawakubo (Tokyo Inst. of Tech.), Marthinus Christoffel du Plessis, Masashi Sugiyama (Univ. of Tokyo)  IBISML2014-71 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Due to sample selection bias or non-stationarity of the environment, the class balance often changes between training and test datasets. Naive classifier training under such a situation yields a biased solution. This bias can be corrected by weighted training according to the test class balance, but this test class balance is often unknown in practice. In this paper, we consider a semi-supervised learning setup where labeled training samples and unlabeled test samples are available, and address the problem of class balance estimation. It was shown that the test class balance can be estimated by fitting a mixture of class-wise training input distributions to the test input distribution, and class balance estimators were developed under, e.g., the Kullback-Leibler divergence and the $L_2$ distance. In this paper, we propose a simple class balance estimator based on the energy distance and demonstrate its usefulness through experiments. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Class balance change / Class-prior estimation / Energy distance / / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 114, no. 306, IBISML2014-71, pp. 271-278, Nov. 2014. | |
| Paper # | IBISML2014-71 | |
| Date of Issue | 2014-11-10 (IBISML) | |
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | IBISML2014-71 |
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| Conference Information | |
| Committee | IBISML |
| Conference Date | 2014-11-17 - 2014-11-19 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Nagoya Univ. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | IBISML |
| Conference Code | 2014-11-IBISML |
| Language | English (Japanese title is available) |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Coping with Class Balance Change in Classification : Class-Prior Estimation with Energy Distance |
| Sub Title (in English) | |
| Keyword(1) | Class balance change |
| Keyword(2) | Class-prior estimation |
| Keyword(3) | Energy distance |
| Keyword(4) | |
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| 1st Author's Name | Hideko Kawakubo |
| 1st Author's Affiliation | Tokyo Institute of Technology (Tokyo Inst. of Tech.) |
| 2nd Author's Name | Marthinus Christoffel du Plessis |
| 2nd Author's Affiliation | The University of Tokyo (Univ. of Tokyo) |
| 3rd Author's Name | Masashi Sugiyama |
| 3rd Author's Affiliation | The University of Tokyo (Univ. of Tokyo) |
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| Speaker | Author-1 |
| Date Time | 2014-11-18 15:00:00 |
| Presentation Time | 180 minutes |
| Registration for | IBISML |
| Paper # | IBISML2014-71 |
| Volume (vol) | vol.114 |
| Number (no) | no.306 |
| Page | pp.271-278 |
| #Pages | 8 |
| Date of Issue | 2014-11-10 (IBISML) |
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