Our
method, Gabor Feature based Multiple Classifier Combination (CAS-GFMCC)
(BMVC05),
is an ensemble learning classifier based on the manipulation of
Gabor features with multiple scales and orientations. The basic
procedure of CAS-GFMCC is described as follows: First, face images
are aligned geometrically and normalized photometrically by using
region-based histogram equalization (AMFG2003).
Then, Gabor filters with 5 scales and 8 orientations are convoluted
with the normalized image and the magnitude of the transform results
are kept for further process. These high dimensional Gabor features,
with a dimension of 40 times of the original normalized face images,
are then adaptively divided into multiple groups (BMVC05,
FG04-1,
AMFG05). And then, for each
feature group, one classifier is learnt through Fisher discriminant
analysis, which will result in an ensemble of classifier. These
classifiers are combined together through fusion strategy.
For
automatic evaluation case, AdaBoost-based methods are exploited for
both the localization of the face (FG04-2)
and facial landmarks, i.e., the two eyes (IWBRS05).
And to enhance the robustness of the system to mis-alignment caused
by the imprecise eye positions, eye perturbation has been used to
augment the training set (FG04-3).
Please refer to the linked papers for more details of our methods.
In
addition, face image re-lighting techniques are exploited to adapt
the method for more robustness to the face images with complex
illumination (named by CAS-GFMCC-L) (ISCAS2002).
You
are also suggested to refer to other related paper published on
CVPR05,
ICCV2005,
IJPRAI2005.
For the list of all our publications, please click
here.