Shape averages and their Bias

Autor: K. V. Mardia, I. L. Dryden
Rok vydání: 1994
Předmět:
Zdroj: Advances in Applied Probability. 26:334-340
ISSN: 1475-6064
0001-8678
DOI: 10.1017/s0001867800026227
Popis: The paper considers the bias of Bookstein's mean estimator for shape under the isotropic normal model. This work depends on certain distributional properties of shape variables. An alternative unbiased modified estimator is proposed and its performance is compared with various estimators, including Procrustes and the exact maximum likelihood estimator, in a simulation study.
Databáze: OpenAIRE