Abstract

We propose a novel approach to simulate the illumination of augmented outdoor scene based on a single image. Unlike previous works, we adopt the technique of PRT to represent the complex illumination of outdoor scenes with a few simple parameters. The illumination is solved by a procedural refinement approach following the more and more accurate estimation of the material parameters. Our method creates a high quality environment map producing wonderful rendering results. We also explore the problem of shadow casting between real and virtual objects. An efficient method is proposed to project complex shadows (such as tree’s shadows) on the ground of the real scene to the surface of the virtual object with texture mapping. Finally, we present a unified scheme for image composition of a real outdoor scene with virtual objects ensuring their illumination consistency and shadow consistency. The experiments demonstrate the effectiveness and flexibility of our method.