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First Steps Towards Automatic Recognition of Spontaneuous Facial Action Units by B. Braathen; M. S. Bartlett; G. Littlewort; J. R. Movellan is a scholarly article available to read on EtoBox.

What is First Steps Towards Automatic Recognition of Spontaneuous Facial Action Units about?

We present ongoing work on a project for automatic recognition of spontaneous facial actions (FACs). Current methods for automatic facial expression recognition assume images are collected in controlled environments in which the subjects deliberately face the camera. Since people often nod or turn their heads, automatic recognition of spontaneous facial behavior requires methods for handling out-of-image-plane head rotations. There are many promising approaches to address the problem of out-of-image plane rotations. In this paper we explore an approach based on 3-D warping of images into canonical views. Since our goal is to explore the potential of this approach, we first tried with images with 8 handlabeled facial landmarks. However the approach can be generalized in a straight-forward manner to work automatically based on the output of automatic feature detectors. A front-end system was developed that jointly estimates camera parameters, head geometry and 3-D head pose across entire sequences of video images. Head geometry and image parameters were assumed constant across images and 3-D head pose is allowed to vary. First a a small set of images was used to estimate camera param

Author

B. Braathen; M. S. Bartlett; G. Littlewort; J. R. Movellan

Publisher

ACM

Published

2001

Language

EN