3d rendering method and apparatus

Abstract

A three-dimensional (3D) rendering method for rendering a 3D model includes rendering a 3D model from each viewpoint of direct light sources, obtaining scene information on scenes rendered from each viewpoint of the direct light sources, generating a matched image in which the scenes are matched based on the scene information, and sampling at least one indirect light source from the matched image.

What is claimed is: 
     
         1 . A three-dimensional (3D) rendering method for rendering a 3D model, the method comprising:
 rendering the 3D model from each viewpoint of a portion of all direct light sources;   obtaining scene information on scenes rendered from each viewpoint of the portion of the direct light sources;   generating a first image in which the scenes are matched based on the scene information; and   sampling at least one indirect light source from the first image.   
     
     
         2 . The method of  claim 1 , further comprising:
 generating a second image by rendering the 3D model from a viewpoint of a remaining direct light source not included in the portion of the direct light sources; and   sampling at least one indirect light source from the second image.   
     
     
         3 . The method of  claim 2 , further comprising rendering the 3D model by applying, to the 3D model, an indirect lighting effect of the indirect light sources sampled from the first image and the second image. 
     
     
         4 . The method of  claim 1 , wherein the generating of the first image comprises generating the first image by combining matched regions in the scenes. 
     
     
         5 . The method of  claim 1 , wherein the scene information comprises attribute information comprising any one or any combination of any two or more of an intensity, a normal, a color, a reflected flux, a position, and a depth value of pixels of each scene. 
     
     
         6 . A non-transitory computer-readable storage medium storing instructions to cause computing hardware to perform the method of  claim 1 . 
     
     
         7 . A three-dimensional (3D) rendering method for rendering a 3D model, the method comprising:
 comparing scenes obtained by rendering the 3D model from each viewpoint of direct light sources;   determining whether to generate a matched image in which the scenes are matched;   generating the matched image in which the scenes are matched based on scene information on the scenes in response to a result of the determining being to generate the matched image; and   sampling at least one indirect light source from the matched image.   
     
     
         8 . The method of  claim 7 , wherein the determining of whether to generate the matched image comprises determining to generate the matched image in response to a size of matched regions in the scenes or a ratio of the size of the matched regions to a size of the scenes satisfying a predetermined condition. 
     
     
         9 . The method of  claim 7 , wherein the generating of the matched image comprises generating the matched image by combining matched regions in the scenes. 
     
     
         10 . The method of  claim 7 , wherein the scene information comprises attribute information comprising any one or any combination of any two or more of an intensity, a normal, a color, a reflected flux, a position, and a depth value of pixels of each scene. 
     
     
         11 . A three-dimensional (3D) rendering apparatus comprising:
 a renderer configured to render a 3D model from each viewpoint of a portion of all direct light sources; and   a scene information storage configured to store scene information on scenes rendered from each viewpoint of the portion of the direct light sources;   wherein the renderer is further configured to generate a first image in which the scenes are matched based on the scene information, and sample at least one indirect light source from the first image.   
     
     
         12 . The apparatus of  claim 11 , wherein the renderer is further configured to generate a second image by rendering the 3D model from a viewpoint of a remaining direct light source not included in the portion of the direct light sources, and sample at least one indirect light source from the second image. 
     
     
         13 . The apparatus of  claim 12 , wherein the renderer is further configured to render the 3D model by applying, to the 3D model, an indirect lighting effect of the indirect light sources sampled from the first image and the second image. 
     
     
         14 . A three-dimensional (3D) rendering method for rendering a 3D model, the method comprising:
 rendering the 3D model from respective viewpoints of direct light sources;   generating a composite image from a result of the rendering; and   sampling an indirect light source from the composite image.   
     
     
         15 . The method of  claim 14 , wherein the rendering of the 3D model produces scenes containing matched regions, the scenes containing the matched regions being respectively rendered from the respective viewpoints of at least two of the direct light sources; and
 the generating of the composite image comprises combining the scenes containing the matched regions to obtain the composite image.   
     
     
         16 . The method of  claim 14 , wherein the rendering of the 3D model produces scenes respectively rendered from the respective viewpoints of the direct light sources;
 the method further comprises obtaining scene information of each of the scenes; and   the generating of the composite image comprises:
 identifying matched regions in the scenes based on the scene information; and 
 combining the scenes containing the matched regions to obtain the composite image. 
   
     
     
         17 . The method of  claim 16 , wherein the scenes comprise scenes associated with a plurality of attributes rendered from each of the respective viewpoints of the direct light sources; and
 the identifying of the matched regions comprises identifying the matched regions based on only one of the attributes.   
     
     
         18 . The method of  claim 17 , wherein the combining of the scenes containing the matched regions comprises combining scenes containing the matched regions associated with all of the plurality of attributes based on the matched regions identified based on only one of the attributes. 
     
     
         19 . The method of  claim 17 , wherein the attributes comprise any two or more of an intensity, a normal, a color, a reflected flux, a position, and a depth value. 
     
     
         20 . The method of  claim 14 , wherein the sampling of the indirect light source comprises sampling the indirect light source only one time and only from the composite image.