Method and apparatus for face alignment by building a hierarchical
classifier network. The hierarchical classifier network connects the
tasks of face detection and face alignment into a smooth coarse-to-fine
procedure. Texture classifiers are trained to recognize feature texture
at different scales for different resolution layers. A multi-layer
structure is employed to organize the texture classifiers, which begins
with one classifier at the first layer and gradually refines the
localization of feature points using additional texture classifiers in
subsequent layers.