Image-Based Fitting Diffuse and Specular Reflectance of Object

Traditional image texture mapping can increase abundant details for virtual object. As virtual lighting condition varies, textures lack of realistic representation with dynamically varying with lighting, due to pictures are captured in especial lighting condition. In computer graphics, it often needs to produce continuous and different illumination animation effect in a fixed viewpoint scene. In order to speed up the rendering, the paper proposes a projections-based method, which can interpolate the scene by using several images. This method uses two quadratic multinomials to respectively fit the diffuse reflection component and the specular reflection component for each pixel in different light sources, coefficients of diffuse reflection multinomial and specular reflection multinomial of each pixel can be figure out by least square method. The coefficients are stored for each pixel Illumination effects for arbitrary light-source position may be interpolated efficiently.