While FIGS. 4B and 4C illustrate a geometric overlay computer animation model with a single control point, FIGS. 4D and 4E illustrate an image modification computer animation model. In FIG. 4D, a computer animation model identifies eyebrow areas 450 and 451 within image 410, as well as a range of motion 452 and 453 for each eyebrow area 450, 451. When the pseudorandom animation is implemented, the image 410 is displayed with the eyebrow areas 450, 451 modified to generate an animation on display 402 within display area 420. During the video output of the animation, the eyebrow areas are treated as control points in the computer model, and can be moved as shown by movements 460, 461 of FIG. 4E which are each associated with control points of a computer animation model.
