Perceptually Guided Corrective Splatting
| dc.contributor.author | Haber, Jorg | en_US |
| dc.contributor.author | Myszkowski, Karol | en_US |
| dc.contributor.author | Yamauchi, Hitoshi | en_US |
| dc.contributor.author | Seidel, Hans-Peter | en_US |
| dc.date.accessioned | 2015-02-16T11:05:25Z | |
| dc.date.available | 2015-02-16T11:05:25Z | |
| dc.date.issued | 2001 | en_US |
| dc.description.abstract | One of the basic difficulties with interactive walkthroughs is the high quality rendering of object surfaces with non-diffuse light scattering characteristics. Since full ray tracing at interactive rates is usually impossible, we render a precomputed global illumination solution using graphics hardware and use remaining computational power to correct the appearance of non-diffuse objects on-the-fly. The question arises, how to obtain the best image quality as perceived by a human observer within a limited amount of time for each frame. We address this problem by enforcing corrective computation for those non-diffuse objects that are selected using a computational model of visual attention. We consider both the saliency- and task-driven selection of those objects and benefit from the fact that shading artifacts of "unattended" objects are likely to remain unnoticed. We use a hierarchical image-space sampling scheme to control ray tracing and splat the generated point samples. The resulting image converges progressively to a ray traced solution if the viewing parameters remain unchanged. Moreover, we use a sample cache to enhance visual appearance if the time budget for correction has been too low for some frame. We check the validity of the cached samples using a novel criterion suited for non-diffuse surfaces and reproject valid samples into the current view. | en_US |
| dc.description.number | 3 | en_US |
| dc.description.seriesinformation | Computer Graphics Forum | en_US |
| dc.description.volume | 20 | en_US |
| dc.identifier.doi | 10.1111/1467-8659.00507 | en_US |
| dc.identifier.issn | 1467-8659 | en_US |
| dc.identifier.pages | 142-153 | en_US |
| dc.identifier.uri | http://dx.doi.org/10.1111/1467-8659.00507 | en_US |
| dc.publisher | Blackwell Publishers Ltd and the Eurographics Association | en_US |
| dc.title | Perceptually Guided Corrective Splatting | en_US |