Subspace Analysis and Optimization for AAM Based Face Alignment

1 Active Appearance Models (AAM) is very powerful for extracting objects, e.g. faces, from images. It is composed of two parts: the AAM subspace model and the AAM search. While these two parts are closely correlated, existing efforts treated them separately and had not considered how to optimize them overall. In this paper, an approach is proposed to optimize the subspace model while considering the search procedure. We first perform a subspace error analysis, and then to minimize the AAM error we propose an approach which optimizes the subspace model according to the search procedure. For the subspace error analysis, we decomposed the subspace error into two parts, which are introduced by the subspace model and the search procedure respectively. This decomposition shows that the optimal results of AAM can be achieved only by optimizing both of them jointly rather than separately. Furthermore, based on this error decomposition, we develop a method to find the optimal subspace model ac...

• Type: Conference
• Year: 2004
• Where: FGR
• Authors: Ming Zhao 0003, Chun Chen, Stan Z. Li, Jiajun Bu
• Keywords: AAM Subspace Model, Biometrics, FGR 2004, Subspace Error, Subspace Model