Home/Generic vs. person specific active appearance models

Generic vs. person specific active appearance models

Ralph Gross, Iain Matthews and Simon Baker
Journal Article, Image and Vision Computing, Vol. 23, No. 11, pp. 1080-1093, November, 2005

View Publication

Copyright notice: This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. These works may not be reposted without the explicit permission of the copyright holder.


Active Appearance Models (AAMs) are generative parametric models that have been successfully used in the past to model faces. Anecdotal evidence, however, suggests that the performance of an AAM built to model the variation in appearance of a single person across pose, illumination, and expression (a Person Specific AAM) is substantially better than the performance of an AAM built to model the variation in appearance of many faces, including unseen subjects not in the training set (a Generic AAM). In this paper we present an empirical evaluation that shows that Person Specific AAMs are, as expected, both easier to build and more robust to fit than Generic AAMs. Moreover, we show that: (1) building a generic shape model is far easier than building a generic appearance model, and (2)~the shape component is the main cause of the reduced fitting robustness of Generic AAMs. We then proceed to describe two refinements to Generic AAMs to improve their performance: (1) a refitting procedure to improve the quality of the ground-truth data used to build the AAM and (2) a new fitting algorithm. For both refinements we demonstrate dramatically improved fitting performance. Finally, we evaluate the effect of these improvements on a combined model construction and fitting task.

author = {Ralph Gross and Iain Matthews and Simon Baker},
title = {Generic vs. person specific active appearance models},
journal = {Image and Vision Computing},
year = {2005},
month = {November},
volume = {23},
number = {11},
pages = {1080-1093},
} 2019-07-03T17:05:34-04:00