The detected and recognized features for the same person are much higher than if a new person is being tested for this experiment. The detected features also decay with time and frame. This decay which is observed with the movement and rotation of the face by the person becomes much faster if the person is different than if the person is same to whose features have been stored. The variation of number of recognized features with respect to continuous variation of frames for the same person, for different person and for absence of any persons are shown in Fig. 4.