SIGGRAPH '86 Proceedings of the 13th annual conference on Computer graphics and interactive techniques
Mathematical statistics (4th ed.)
Mathematical statistics (4th ed.)
Generating antialiased images at low sampling densities
SIGGRAPH '87 Proceedings of the 14th annual conference on Computer graphics and interactive techniques
Antialiased ray tracing by adaptive progressive refinement
SIGGRAPH '89 Proceedings of the 16th annual conference on Computer graphics and interactive techniques
An introduction to ray tracing
Particle transport and image synthesis
SIGGRAPH '90 Proceedings of the 17th annual conference on Computer graphics and interactive techniques
Statistically optimized sampling for distributed ray tracing
SIGGRAPH '85 Proceedings of the 12th annual conference on Computer graphics and interactive techniques
Antialiasing through stochastic sampling
SIGGRAPH '85 Proceedings of the 12th annual conference on Computer graphics and interactive techniques
An improved illumination model for shaded display
Communications of the ACM
Simulation and the Monte Carlo Method
Simulation and the Monte Carlo Method
An updated cross-indexed guide to the ray-tracing literature
ACM SIGGRAPH Computer Graphics
Energy preserving non-linear filters
SIGGRAPH '94 Proceedings of the 21st annual conference on Computer graphics and interactive techniques
SIGGRAPH '95 Proceedings of the 22nd annual conference on Computer graphics and interactive techniques
Optimally combining sampling techniques for Monte Carlo rendering
SIGGRAPH '95 Proceedings of the 22nd annual conference on Computer graphics and interactive techniques
Monte Carlo techniques for direct lighting calculations
ACM Transactions on Graphics (TOG)
A perceptually based adaptive sampling algorithm
Proceedings of the 25th annual conference on Computer graphics and interactive techniques
Anisotropic diffusion for Monte Carlo noise reduction
ACM Transactions on Graphics (TOG)
ACM Transactions on Graphics (TOG)
Accelerating path tracing by re-using paths
EGRW '02 Proceedings of the 13th Eurographics workshop on Rendering
Accurate Direct Illumination Using Iterative Adaptive Sampling
IEEE Transactions on Visualization and Computer Graphics
Multidimensional adaptive sampling and reconstruction for ray tracing
ACM SIGGRAPH 2008 papers
Efficient and good Delaunay meshes from random points
Computer-Aided Design
NoRM: No-Reference Image Quality Metric for Realistic Image Synthesis
Computer Graphics Forum
Two stage importance sampling for direct lighting
EGSR'06 Proceedings of the 17th Eurographics conference on Rendering Techniques
Hardware challenges for ray tracing and radiosity algorithms
EGGH'92 Proceedings of the Seventh Eurographics conference on Graphics Hardware
5D Covariance tracing for efficient defocus and motion blur
ACM Transactions on Graphics (TOG)
Hi-index | 0.00 |
We examine a class of adaptive sampling techniques employed in image synthesis and show that those commonly used for efficient anti-aliasing are statistically biased. This bias is dependent upon the image function being sampled as well as the strategy for determining the number of samples to use. It is most prominent in areas of high contrast and is attributable to early stages of sampling systematically favoring one extreme or the other. If the expected outcome of the entire adaptive sampling algorithm is considered, we find that the bias of the early decisions is still present in the final estimator. We propose an alternative strategy for performing adaptive sampling that is unbiased but potentially more costly. We conclude that it may not always be practical to mitigate this source of bias, but as a source of error it should be considered when high accuracy and image fidelity are a central concern.