QSplat: a multiresolution point rendering system for large meshes
Proceedings of the 27th annual conference on Computer graphics and interactive techniques
IEEE Transactions on Visualization and Computer Graphics
The Design of High-Level Features for Photo Quality Assessment
CVPR '06 Proceedings of the 2006 IEEE Computer Society Conference on Computer Vision and Pattern Recognition - Volume 1
Algorithms for rendering depth of field effects in computer graphics
ICCOMP'08 Proceedings of the 12th WSEAS international conference on Computers
Depth of field postprocessing for layered scenes using constant-time rectangle spreading
Proceedings of Graphics Interface 2009
Hardware-accelerated global illumination by image space photon mapping
Proceedings of the Conference on High Performance Graphics 2009
Proceedings of the Conference on High Performance Graphics 2009
A local image reconstruction algorithm for stochastic rendering
I3D '11 Symposium on Interactive 3D Graphics and Games
Temporal light field reconstruction for rendering distribution effects
ACM SIGGRAPH 2011 papers
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We present a method for rendering depth of field (DoF) effects in a ray-tracing based rendering pipeline using very few samples (typically two or three) per pixel, with the ability to refocus at arbitrary depths at a given view point without gathering more samples. To do so, we treat each sample as a proxy for possible nearby samples and calculate its contributions to the final image with a splat-and-gather scheme. The radiance for each pixel in the output image is then obtained via compositing all contributing samples. We optimize the pipeline using mipmap-like techniques so that the running time is independent of the amount of focal blur in the image. Our method approximates the underlying physical image formation process and thus avoids many of the artifacts of other approximation algorithms. With very low budget it provides satisfactory DoF rendering for most purposes, and a quick preview of DoF effects for applications demanding high rendering quality.