Practical Image Based Lighting (2002)
article⁄Practical Image Based Lighting (2002)
abstract⁄In this paper, we present a userfriendly and practical method for seamless integration of computergeneratedimages CG with real photographs and video. In general, such seamless integration isextremely difficult and requires recovery of realworld information to simulate the same environment forboth CG and real objects. This realworld information includes camera positions and parameters,shapes, material properties, and motion of real objects. Among these, one of the most important islighting.Imagebased lighting that is developed to recover illumination information of the real world fromphotographs has recently become popular in computer graphics. In this paper we present a practicalimagebased lighting method that is based on a simple and easily constructable device a square platewith a cylindrical stick. We have developed a userguided system to approximately recover illuminationinformation i.e. orientations, colors, and intensities of light sources from a photograph of this device.Our approach also helps to recover surface colors of real objects based on reconstructed lightinginformation.
