Generating antialiased images at low sampling densities
SIGGRAPH '87 Proceedings of the 14th annual conference on Computer graphics and interactive techniques
Spectrally optimal sampling for distribution ray tracing
Proceedings of the 18th annual conference on Computer graphics and interactive techniques
Multidimensional adaptive sampling and reconstruction for ray tracing
ACM SIGGRAPH 2008 papers
ACM Transactions on Graphics (TOG)
Frequency analysis and sheared reconstruction for rendering motion blur
ACM SIGGRAPH 2009 papers
Selective and adaptive supersampling for real-time ray tracing
Proceedings of the Conference on High Performance Graphics 2009
ACM SIGGRAPH Asia 2009 papers
Edge-avoiding À-Trous wavelet transform for fast global illumination filtering
Proceedings of the Conference on High Performance Graphics
A local image reconstruction algorithm for stochastic rendering
I3D '11 Symposium on Interactive 3D Graphics and Games
Frequency analysis and sheared filtering for shadow light fields of complex occluders
ACM Transactions on Graphics (TOG)
Temporal light field reconstruction for rendering distribution effects
ACM SIGGRAPH 2011 papers
Adaptive sampling and reconstruction using greedy error minimization
Proceedings of the 2011 SIGGRAPH Asia Conference
On filtering the noise from the random parameters in Monte Carlo rendering
ACM Transactions on Graphics (TOG)
Reconstructing the indirect light field for global illumination
ACM Transactions on Graphics (TOG) - SIGGRAPH 2012 Conference Proceedings
Image denoising using scale mixtures of Gaussians in the wavelet domain
IEEE Transactions on Image Processing
Improved structures of maximally decimated directional filter Banks for spatial image analysis
IEEE Transactions on Image Processing
The contourlet transform: an efficient directional multiresolution image representation
IEEE Transactions on Image Processing
KD-tree based parallel adaptive rendering
The Visual Computer: International Journal of Computer Graphics - CGI'2012 Conference
SURE-based optimization for adaptive sampling and reconstruction
ACM Transactions on Graphics (TOG) - Proceedings of ACM SIGGRAPH Asia 2012
Adaptive rendering with non-local means filtering
ACM Transactions on Graphics (TOG) - Proceedings of ACM SIGGRAPH Asia 2012
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We propose a novel parallel image space adaptive rendering approach. Contourlet transform which includes Laplacian pyramid and directional filter banks is modified for multi-scale and directional analysis in our algorithm. In sampling stage, the image space is coarsely sampled first. The sampled image is analyzed into coarse and difference values in multi-scale using Laplacian pyramid transform. Based on the analysis, a heuristic method is proposed to repeatedly distribute adaptive Monte Carlo samples. In reconstruction stage, the final image is reconstructed by filtering each pixel using our anisotropic per-pixel filter. The filter size depends on the variance and attenuation values. The filter's anisotropic property is computed by the directional filter banks. Compared to the state-of-the-art image space adaptive rendering methods, the results rendered by our algorithm show improvement in both visual image quality and numerical error while using sparse samples.