Fig. 1. Facial animation from a single image.

We propose an anatomically coherent approach that is not constrained to a discrete number of expressions and can animate a given image and render novel expressions in a continuum. In these examples, we are given solely the left-most input image I_yr (highlighted by a green square), and the parameter α controls the degree of activation of the target action units involved in a smiling-like expression. Additionally, our system can handle images with unnatural illumination conditions, such as the example in the bottom row.