Approximating dynamic global illumination in image space
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Technical Section: Real-time ambient occlusion and halos with Summed Area Tables
Computers and Graphics
Proceedings of the Conference on High Performance Graphics
GPU curvature estimation on deformable meshes
I3D '11 Symposium on Interactive 3D Graphics and Games
The alchemy screen-space ambient obscurance algorithm
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The State of the Art in Interactive Global Illumination
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Interactive, multiresolution image-space rendering for dynamic area lighting
EGSR'10 Proceedings of the 21st Eurographics conference on Rendering
Two methods for fast ray-cast ambient occlusion
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Low-Complexity Intervisibility in Height Fields
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Multi-view ambient occlusion with importance sampling
Proceedings of the ACM SIGGRAPH Symposium on Interactive 3D Graphics and Games
Screen-space far-field ambient obscurance
Proceedings of the 5th High-Performance Graphics Conference
EGSR '13 Proceedings of the Eurographics Symposium on Rendering
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Ambient occlusion (AO) is a lighting model that approximates the diffuse illumination of a surface based on its directly visible occluders. It can be rendered by tracing rays through the normal-oriented unit hemisphere, and returning the percentage of rays that do no hit any geometry at a distance d R. Screen-space ambient occlusion (SSAO) is an image-based approach that uses the depth buffer of the current rendered scene as an approximation of its geometry. Therefore, compared to other AO algorithms such as ray tracing, SSAO has the advantage of handling dynamic geometry with significantly lower overhead.