Abstract: The purpose of augmented reality technology is to superimpose computer-generated virtual objects into real scenes. The realization of augmented reality requires the estimation of the scene lighting. For the highlight scene, different kinds of reflected light information in the scene is used to effectively estimate the illumination. Firstly, the diffuse reflection map and the specular reflection map are obtained, and the intrinsic image decomposition of the diffuse reflection map is further performed to obtain the albedo map and the shadow map. Then, the illumination information of the input image is calculated based on the decomposition result and the depth of the scene. Finally, the global illumination model is used to render the virtual object, and the highly fused illumination effect of virtual and real scene can be obtained.

Key words: illumination estimation, image decomposition, reflected light, global illumination model