Patent ID: 9633471
Date: 2017-04-25
CPC Classifications: G06T

Claim:
1. An image processing device comprising: a photon map generator configured to construct a virtual three-dimensional space as a rendering target and generate a photon map by distributing photons used for a photon mapping method; a low-luminance region identifying unit configured to identify a low-luminance region estimated to have low luminance when the virtual three-dimensional space is projected onto a screen corresponding to a viewpoint; and a rendering part configured to collect photons corresponding to all pixels based on the photon map with reduction in a collection rate of photons corresponding to a pixel included in the low-luminance region compared with the other region, and calculate radiance to decide a pixel value and generate a display image, wherein the low-luminance region identifying unit identifies the low-luminance region by acquiring distribution of an evaluation value representing a degree of occlusion of ambient light by an object surface in the virtual three-dimensional space, and wherein the rendering part changes the collection rate of photons among pixels included in the low-luminance region based on the evaluation value.