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Replica Exchange Light Transport

Shinya Kitaoka, Yoshifumi Kitamura, Fumio Kishino
2009 Computer graphics forum (Print)  
We compare the images generated with our algorithm to those generated with bidirectional path tracing and Metropolis light transport based on the primary sample space.  ...  Then the algorithm combines the obtained path samples from each distribution using multiple importance sampling.  ...  samples based on multiple distributions, so we use a multiple importance sampling technique [VG95] to compute the expected value.  ... 
doi:10.1111/j.1467-8659.2009.01540.x fatcat:bbbvyzdkwjce7g24ckqh5xbvha

Charted metropolis light transport

Jacopo Pantaleoni
2017 ACM Transactions on Graphics  
We further apply the novel algorithms to light transport simulation, obtaining a new type of algorithm called charted Metropolis light transport, that can be seen as a bridge between primary sample space  ...  and path space Metropolis light transport.  ...  Charted Metropolis Light Transport It should now be clear how the above algorithms can be applied to light transport simulation.  ... 
doi:10.1145/3072959.3073677 fatcat:pcege6ptcvcejoo35lohh64p7a

Robust adaptive photon tracing using photon path visibility

Toshiya Hachisuka, Henrik Wann Jensen
2011 ACM Transactions on Graphics  
We demonstrate that the final algorithm is strikingly simple, yet effective at sampling photons under lighting conditions that would be difficult for existing Monte Carlo ray tracing based methods.  ...  The key contribution in our algorithm is the use of visibility of photon path as the importance function which ensures that our sampling algorithm focuses on paths that are visible from the given viewpoint  ...  Kitaoka et al. [2009] applied this algorithm to modify the original Metropolis light transport method by defining multiple target distributions based on a heuristic separation of light paths (e.g., direct  ... 
doi:10.1145/2019627.2019633 fatcat:dse22uwawjbnbplnyv5bcihaju

A Simple and Robust Mutation Strategy for the Metropolis Light Transport Algorithm

Csaba Kelemen, Laszlo Szirmay-Kalos, Gyorgy Antal, Ferenc Csonka
2002 Computer graphics forum (Print)  
If we use multiple importance sampling for this combination, the combined method will be as good at bright regions as the Metropolis algorithm and at dark regions as random walks.  ...  This paper presents a new mutation strategy for the Metropolis light transport algorithm, which works in the unit cube of pseudo-random numbers instead of mutating in the path space.  ...  Metropolis light transport algorithm.  ... 
doi:10.1111/1467-8659.00703 fatcat:agwnnbfmjrdcjazebbljttg54a

A Simple and Robust Mutation Strategy for the Metropolis Light Transport Algorithm

Csaba Kelemen, László Szirmay-Kalos, György Antal, Ferenc Csonka
2002 Computer graphics forum (Print)  
If we use multiple importance sampling for this combination, the combined method will be as good at bright regions as the Metropolis algorithm and at dark regions as random walks.  ...  This paper presents a new mutation strategy for the Metropolis light transport algorithm, which works in the unit cube of pseudo-random numbers instead of mutating in the path space.  ...  Metropolis light transport algorithm.  ... 
doi:10.1111/1467-8659.t01-1-00703 fatcat:t6gdnhtscvaingman3axdj47ty

Light Transport Simulation via Generalized Multiple Importance Sampling [article]

Qi Liu, Yiheng Zhang, Lizhuang Ma
2018 arXiv   pre-print
Therefore, robust light transport simulation algorithms based on Monte Carlo sampling for different types of scenes are still uncompleted.  ...  In this paper, we address this problem by present a general method, named generalized multiple importance sampling (GMIS), to enhance the robustness of light transport simulation based on MIS.  ...  Metropolis light transport Metropolis light transport (MLT) algorithm [22] introduces Markov Chain Monte Carlo (MCMC) method to the rendering problem.  ... 
arXiv:1803.04305v2 fatcat:e35r62e7gjgkfkd5lajtrpfubu

Multiplexed metropolis light transport

Toshiya Hachisuka, Anton S. Kaplanyan, Carsten Dachsbacher
2014 ACM Transactions on Graphics  
Based on this framework, we also develop a novel rendering algorithm, multiplexed Metropolis light transport, which automatically and adaptively constructs paths with appropriate techniques as predicted  ...  In light transport simulation, however, there is more information that can be used to improve the efficiency of path sampling.  ...  We would like to thank Troels Mortensen, Heine Stokholm, and Florian Simon for comments on the draft.  ... 
doi:10.1145/2601097.2601138 fatcat:d6v6tk7rfvc4tozw22hdsmf4v4

Learning Light Transport the Reinforced Way [article]

Ken Dahm, Alexander Keller
2017 arXiv   pre-print
Based on this correspondence, a scheme to learn importance while sampling path space is derived.  ...  The new approach is demonstrated in a consistent light transport simulation algorithm that uses reinforcement learning to progressively learn where light comes from.  ...  We therefore propose a method that is based on reinforcement learning [28] and allows one to sample light transport paths that are much more likely to connect lights and sensors.  ... 
arXiv:1701.07403v2 fatcat:z7rwjvrzurae5enpugo46dl4we

A Spatial Target Function for Metropolis Photon Tracing

Adrien Gruson, Mickaël Ribardière, Martin Šik, Jiří Vorba, Rémi Cozot, Kadi Bouatouch, Jaroslav Křivánek
2016 ACM Transactions on Graphics  
The human visual system is sensitive to relative differences in luminance, but light transport simulation algorithms based on Metropolis sampling often result in a highly nonuniform relative error distribution  ...  Although this issue has previously been addressed in the context of the Metropolis light transport algorithm, our work focuses on Metropolis photon tracing.  ...  Our work focuses on improving light subpath sampling for photon density estimation. Specifically, we use Metropolis sampling to guide light subpaths toward the camera.  ... 
doi:10.1145/3072959.2963097 fatcat:jnqawc4s7neotp353h2kn3kske

A Spatial Target Function for Metropolis Photon Tracing

Adrien Gruson, Mickaël Ribardière, Martin Šik, Jiří Vorba, Rémi Cozot, Kadi Bouatouch, Jaroslav Křivánek
2016 ACM Transactions on Graphics  
The human visual system is sensitive to relative differences in luminance, but light transport simulation algorithms based on Metropolis sampling often result in a highly nonuniform relative error distribution  ...  Although this issue has previously been addressed in the context of the Metropolis light transport algorithm, our work focuses on Metropolis photon tracing.  ...  Our work focuses on improving light subpath sampling for photon density estimation. Specifically, we use Metropolis sampling to guide light subpaths toward the camera.  ... 
doi:10.1145/2963097 fatcat:tksfqog3mzgp5ir4v3ofgnnws4

A spatial target function for metropolis photon tracing

Adrien Gruson, Mickaël Ribardière, Martin Šik, Jiří Vorba, Rémi Cozot, Kadi Bouatouch, Jaroslav Křivánek
2017 ACM Transactions on Graphics  
The human visual system is sensitive to relative differences in luminance, but light transport simulation algorithms based on Metropolis sampling often result in a highly nonuniform relative error distribution  ...  Although this issue has previously been addressed in the context of the Metropolis light transport algorithm, our work focuses on Metropolis photon tracing.  ...  Our work focuses on improving light subpath sampling for photon density estimation. Specifically, we use Metropolis sampling to guide light subpaths toward the camera.  ... 
doi:10.1145/3072959.3126811 fatcat:m2ftexwlqjgj3hhyz57bkdgvg4

Arbitrary Importance Functions for Metropolis Light Transport

Jared Hoberock, John C. Hart
2010 Computer graphics forum (Print)  
We present a generalization of the scalar importance function employed by Metropolis Light Transport (MLT) and related Markov chain rendering algorithms.  ...  Normally, MLT samples light paths with a tendency proportional to their brightness.  ...  Noise-aware metropolis light transport Our normalizing importance function encourages stratification by equalizing pixel importance and frees us to target arbitrary sampling patterns.  ... 
doi:10.1111/j.1467-8659.2010.01713.x fatcat:gjdlydi5freo7ezxjgb5brrxxa

Metropolis Instant Radiosity

B. Segovia, J.C. Iehl, B. Péroche
2007 Computer graphics forum (Print)  
Conference (c) -Cabin (d) -Theater (e) -Cruiser (f) (g) -Three Dragon Room (h) -A Jack-o-Lantern in (g) Figure 1: Some images rendered with Metropolis Instant Radiosity, a coherent ray tracer, and 1024  ...  and, (c) with many light sources or complex scenes as shown in (d) and (e), and with very difficult visibility issues as shown in Figures (f), (g), and (h).  ...  To solve these issues, an innovative numerical algorithm, Metropolis Light Transport (MLT) was developed [VG97] .  ... 
doi:10.1111/j.1467-8659.2007.01065.x fatcat:v2taxfsijbd53h3uz4wgg6aiay

Path Integral Methods for Light Transport Simulation: Theory and Practice [article]

Jaroslav Krivanek, Iliyan Georgiev, Anton S. Kaplanyan, Juan Canada
2014 Eurographics State of the Art Reports  
We are witnessing a renewed research interest in robust and efficient light transport simulation based on statistical methods.  ...  A significant part of the tutorial is devoted to the application of Markov chain Monte Carlo methods for light transport simulation, such as Metropolis Light Transport and its variants.  ...  . • Second, the path integral framework allows us to develop new light transport algorithms based on advanced, global path sampling techniques, such as Metropolis Light Transport.  ... 
doi:10.2312/egt.20141023 fatcat:uh2lww2gxzckppa3cynx2udigi

Metropolis Light Transport for Participating Media [chapter]

Mark Pauly, Thomas Kollig, Alexander Keller
2000 Eurographics  
In this paper we show how Metropolis Light Transport can be extended both in the underlying theoretical framework and the algorithmic implementation to incorporate volumetric scattering.  ...  Based on this framework we introduce a new mutation strategy that is specifically designed for participating media.  ...  Special thanks go to Christa Marx for the models rendered on the colorpage.  ... 
doi:10.1007/978-3-7091-6303-0_2 fatcat:4rfeovfxfrhm5ancaamraiub24
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