Applying human visual property in the recognition of
faces, people can identify face from very far distance,
even the details are vague. That means the symmetry
characteristic is enough to be recognized. Human face
is made up of eyes, nose, mouth and chin etc. There
are differences in shape, size and structure of those
organs, so the faces are differ in thousands ways, and
we can describe them with the shape and structure of
the organs so as to recognize them. One common
method is to extract the shape of the eyes, nose,
mouth and chin, and then distinguish the faces by
distance and scale of those organs (as shown in Fig.1).
The other method is to use deformable model to
describe the shape of the organs on face subtly [7].
We can tell the characteristics of the organs easily by
locating the feature points from a face image. If we
normalized the characteristics which have the
properties of scale, translation and rotation invariance,
we can normalize the faces in the database through