Post - filtering for Depth of Field Simulation with Ray Distribution Buffer Mikio

In real photography, focus control plays an important role in emphasizing the subject in the photo. In computer graphics, however, focus simulation, or depth of field simulation, is used only in a limited way because it is too expensive if super-sampling is used. This paper proposes an efficient depth of field simulation method that can be realized as postfiltering . To deal with the partial occlusion of outof-focus objects, the ray distribution buffer (RDB) is introduced . Z-buffering with the RDBs performs hidden surface removal for each distributed ray, as in distributed ray tracing. Experiments demonstrate that depth of field simulation is not an expensive process with the RDB method.