On the Bias of Predictive Distribution in Pattern Recognition

LanguageJapanese
TypeJournal Articles
AuthorsMasakazu Iwamura, Shinichiro Omachi, Hirotomo Aso
TitleOn the Bias of Predictive Distribution in Pattern Recognition
JournalTrans. IEICE
Vol.J87-D-II
No.2
Pagespp.407-415
ReviewedReviewed
DateFebruary 2004
Research fieldsPattern recognition
URLhttp://search.ieice.org/bin/summary.php?id=j87-d2_2_407
KeyIwamura2004_IEICE (id=304)

Abstract

Bayesian estimation is known to improve recognition accuracy. However, the method is not effective due to the bias of the probability when sample sizes are not the same. In this paper, the function of the bias of Geisser's predictive distribution is derived without any approximation. It is shown that correcting likelihood by the function improves recognition accuracy. This indicates the bias is one of the cause of decreasing recognition accuracy. From the character of the function, it is easy to explain the knowledges obtained from experiments. The derivation of the function can be applied to other predictive distributions.

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