Removing highlight spots in visual hull rendering

Highlight spots could often cause artifacts in image-based visual hull (IBVH) rendering. In this paper, we propose a method that can remove highlight spots from reference images by utilizing the features of visual hull. First, we find the counterparts of a highlight sub-image in other images, with the aid of the correspondence between reference images in visual hull rendering. Then the illumination and color detail of the pixels in the sub-image could be retrieved from their corresponding pixels by color blending. Thus, highlight spots are removed seamlessly without affecting other regions of the scene. Using this improved rendering method, we can obtain more realistic and precise result, and relighting of the visual hull also becomes possible.