Dynamic range expansion based on image statistics
High dynamic range (HDR) displays are becoming more common, which has given rise to a number of reverse tone mapping techniques. The goal of these techniques is to expand the dynamic range of all the existing low dynamic range content to t that of these displays. Most of the reverse tone mapping operators, however, fail to o er a good solution in cases where the input images contain large saturated areas. In this paper we present an interactive higher-level approach to reverse tone mapping. Inspired by the Zone System used in photography, it can also be used as an artistic tool where both the tonal balance and the mood of the nal depiction can be adjusted by the user.