Voxel-Space Ambient Occlusion

Abstract

Ambient occlusion adds important detail to a scene. This paper presents a multiresolution screen-space voxel based ambient occlusion technique, which improves G-buffer based techniques, avoiding artifacts such as haloing. Our technique is scalable to the level-of-detail desired by the user. Because we assume voxels to be small objects, we compute ambient occlusion using an area rendering equation based formulation. As ambient occlusion changes smoothly across a scene, we use a stencil based screen-space multiresolution buffer to refine and render multiple resolution images. Curvature and depth discontinuity metrics to identify appropriate sampling rates.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Feb 01, 2012
Accession Number
ADA586797

Entities

People

  • Chris Wyman
  • Rajeev Penmatsa

Organizations

  • University of Iowa

Tags

DTIC Thesaurus Topics

  • Artifacts
  • Computer Graphics
  • Computer Science
  • Coordinate Systems
  • Curvature
  • Discontinuities
  • Equations
  • Geometry
  • Graphics
  • Hemispheres
  • Illumination
  • Light Sources
  • Military Research
  • New York
  • Sampling
  • Vascular System Injuries
  • Visibility

Readers

  • Computer Vision.

Technology Areas

  • Space