Light environment estimation from a single cylinder image

This paper presents a proposal of a method to estimate a light environment using a single image of cylinder as a calibration object with a Lambertian surface. The light environment to be estimated is modeled as a single light source with size and an ambient light. The proposed method estimates the model parameter directly from pixel values of a single cylinder image. Experimental results demonstrate the effectiveness of the proposed method, which can estimate the model parameter with sufficient resolution for rendering a computer graphics object superimposed to a real image.