1. A face recognition method comprising: obtaining an original face image from a database and reconstructing a 3D face model for said original face image using a 3D morphable face model; providing synthesized face images from said 3D face model for training a face recognition classifier; receiving a plurality of video frames of a face, and obtaining a similarity probability for each said video frame from said face recognition classifier; and fusing said temporal similarity probability for each said video frame by accumulation to obtain a face recognition confidence value, and if said face recognition confidence value is larger than a threshold, said face is recognized to be the same as the face from said original face image.