Photo-Realistic Models for Pupil Light Reflex and Iris Pattern Deformation

• Vitor F. Pamplona UFRGS
• Manuel M. Oliveira UFRGS
• Gladimir V. G. Baranoski University of Waterloo

Abstract

We introduce a physiologically-based model for pupil light reflex (PLR) and an image-based model for iridal pattern deformation. Our time-dependent PLR model expresses the pupil diameter as a function of the environment lighting, naturally adapting the pupil diameter even to abrupt changes in lighting conditions. Since the parameters of our PLR model were derived from measured data, it correctly simulates the actual behavior of the human pupil. Another contribution of our work is a model for realist deformation of the iris pattern as a function of pupil size. Our models produce high-fidelity appearance effects and can be used to produce real-time predictive animations of the pupil and iris under variable lighting conditions. We assess the predictability and quality of our simulations through comparisons of modeled results against measured data derived from experiments. Combined, our models can bring facial animation to new photorealistic standards.

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