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 Toshiya Hachisuka

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Average citations per article15.71
Citation Count440
Publication count28
Publication years2008-2018
Available for download23
Average downloads per article761.74
Downloads (cumulative)17,520
Downloads (12 Months)1,384
Downloads (6 Weeks)95
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28 results found Export Results: bibtexendnoteacmrefcsv

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1 published by ACM
December 2018 ACM Transactions on Graphics (TOG): Volume 37 Issue 6, November 2018
Publisher: ACM
Bibliometrics:
Citation Count: 0
Downloads (6 Weeks): 4,   Downloads (12 Months): 237,   Downloads (Overall): 237

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Markov chain Monte Carlo (MCMC) rendering utilizes a sequence of correlated path samples which is obtained by iteratively mutating the current state to the next. The efficiency of MCMC rendering depends on how well the mutation strategy is designed to adapt to the local structure of the state space. We ...
Keywords: Markov chain Monte Carlo light transport, global illumination

2 published by ACM
December 2018 SA '18: SIGGRAPH Asia 2018 Courses
Publisher: ACM
Bibliometrics:
Citation Count: 0
Downloads (6 Weeks): 3,   Downloads (12 Months): 123,   Downloads (Overall): 123

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Despite the wide adoption in film production and animation industry nowadays, Monte Carlo light transport simulation is still prone to producing noisy images within short rendering time. Accelerating the convergence of Monte Carlo rendering without sacrificing its accuracy is by far a challenging task. In this course, we will learn ...

3 published by ACM
July 2018 ACM Transactions on Graphics (TOG): Volume 37 Issue 4, August 2018
Publisher: ACM
Bibliometrics:
Citation Count: 1
Downloads (6 Weeks): 6,   Downloads (12 Months): 142,   Downloads (Overall): 201

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Gradient-domain rendering can improve the convergence of surface-based light transport by exploiting smoothness in image space. Scenes with participating media exhibit similar smoothness and could potentially benefit from gradient-domain techniques. We introduce the first gradient-domain formulation of image synthesis with homogeneous participating media, including four novel and efficient gradient-domain volumetric ...
Keywords: gradient rendering, participating media

4 published by ACM
July 2018 Proceedings of the ACM on Computer Graphics and Interactive Techniques: Volume 1 Issue 1, July 2018
Publisher: ACM
Bibliometrics:
Citation Count: 1
Downloads (6 Weeks): 0,   Downloads (12 Months): 20,   Downloads (Overall): 25

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Efficient light transport simulation is important for many applications in computer graphics. Many-light methods based on virtual point lights (VPLs) especially work well for scenes consist mainly of diffuse materials. Rendered images with VPLs, however, are known to suffer from energy loss due to clamping of the VPL contributions. Removing ...
Keywords: density estimation, global illumination, many lights

5
July 2018 SR '18: Proceedings of the Eurographics Symposium on Rendering: Experimental Ideas & Implementations
Publisher: Eurographics Association
Bibliometrics:
Citation Count: 0

Sampled paths in Monte Carlo ray tracing can be arbitrarily close to each other due to its stochastic nature. Such clumped samples in the path space tend to contribute little toward an accurate estimate of each pixel. Bidirectional light transport methods make this issue further complicated since connecting paths of ...

6 published by ACM
November 2017 ACM Transactions on Graphics (TOG): Volume 36 Issue 6, November 2017
Publisher: ACM
Bibliometrics:
Citation Count: 0
Downloads (6 Weeks): 12,   Downloads (12 Months): 65,   Downloads (Overall): 364

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Simulating the behavior of soap films and foams is a challenging task. A direct numerical simulation of films and foams via the Navier-Stokes equations is still computationally too expensive. We propose an alternative formulation inspired by geometric flow. Our model exploits the fact, according to Plateau's laws, that the steady ...
Keywords: fluid simulation, geometric flow, plateau's problem, soap film

7 published by ACM
July 2017 ACM Transactions on Graphics (TOG): Volume 36 Issue 4, July 2017
Publisher: ACM
Bibliometrics:
Citation Count: 2
Downloads (6 Weeks): 16,   Downloads (12 Months): 76,   Downloads (Overall): 371

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Rendering algorithms using Markov chain Monte Carlo (MCMC) currently build upon two different state spaces. One of them is the path space, where the algorithms operate on the vertices of actual transport paths. The other state space is the primary sample space, where the algorithms operate on sequences of numbers ...
Keywords: global illumination, markov chain Monte Carlo

8
June 2017 EGSR '17: Proceedings of the Eurographics Symposium on Rendering: Experimental Ideas & Implementations
Publisher: Eurographics Association
Bibliometrics:
Citation Count: 0

We propose an extension of the path integral formulation amenable to the expression of volumetric light transport with photon beam estimates. Our main contribution is a generalization of Hachisuka et al.'s extended path space formulation [HPJ12] to light transport in participating media. Our formulation supports various point- and beam-based volumetric ...

9
May 2017 Computer Graphics Forum: Volume 36 Issue 2, May 2017
Publisher: The Eurographs Association & John Wiley & Sons, Ltd.
Bibliometrics:
Citation Count: 0

The most common solutions to the light transport problem rely on either Monte Carlo MC integration or density estimation methods, such as uni- & bi-directional path tracing or photon mapping. Recent gradient-domain extensions of MC approaches show great promise; here, gradients of the final image are estimated numerically instead of ...
Keywords: Categories and Subject Descriptors according to ACM CCS, I.3.7 [Computer Graphics]: 3D Graphics & Realism-Raytracing

10
April 2017 EG '17: Proceedings of the European Association for Computer Graphics: Short Papers
Publisher: Eurographics Association
Bibliometrics:
Citation Count: 0

Rendering of highly scattering media is computationally expensive in general. While existing BSSRDF models can accurately and efficiently approximate light scattering in homogeneous media, we still have to resort to costly Monte Carlo simulation for heterogeneous media. We propose a simple parameter estimation method which enables homogeneous BSSRDF models to ...

11 published by ACM
November 2016 ACM Transactions on Graphics (TOG) - Proceedings of ACM SIGGRAPH Asia 2016: Volume 35 Issue 6, November 2016
Publisher: ACM
Bibliometrics:
Citation Count: 6
Downloads (6 Weeks): 2,   Downloads (12 Months): 50,   Downloads (Overall): 350

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Efficiently simulating light transport in various scenes with a single algorithm is a difficult and important problem in computer graphics. Two major issues have been shown to hinder the efficiency of the existing solutions: light transport due to multiple highly glossy or specular interactions, and scenes with complex visibility between ...
Keywords: light transport simulation, markov chain monte carlo, global illumination, photon density estimation

12 published by ACM
December 2014 ACM Transactions on Graphics (TOG): Volume 34 Issue 1, November 2014
Publisher: ACM
Bibliometrics:
Citation Count: 17
Downloads (6 Weeks): 1,   Downloads (12 Months): 35,   Downloads (Overall): 517

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Rendering translucent materials using Monte Carlo ray tracing is computationally expensive due to a large number of subsurface scattering events. Faster approaches are based on analytical models derived from diffusion theory. While such analytical models are efficient, they miss out on some translucency effects in the rendered result. We present ...
Keywords: BSSRDF, Rendering, diffusion dipole, radiative transfer, subsurface scattering, translucent materials, turbid media

13 published by ACM
July 2014 ACM Transactions on Graphics (TOG): Volume 33 Issue 4, July 2014
Publisher: ACM
Bibliometrics:
Citation Count: 21
Downloads (6 Weeks): 3,   Downloads (12 Months): 51,   Downloads (Overall): 644

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Global illumination algorithms using Markov chain Monte Carlo (MCMC) sampling are well-known for their efficiency in scenes with complex light transport. Samples in such algorithms are generated as a history of Markov chain states so that they are distributed according to the contributions to the image. The whole process is ...
Keywords: Markov chain Monte Carlo, global illumination, multiple importance sampling

14 published by ACM
July 2014 ACM Transactions on Graphics (TOG): Volume 33 Issue 4, July 2014
Publisher: ACM
Bibliometrics:
Citation Count: 27
Downloads (6 Weeks): 1,   Downloads (12 Months): 35,   Downloads (Overall): 554

Full text available: PDFPDF
Efficiently computing light transport in participating media in a manner that is robust to variations in media density, scattering albedo, and anisotropy is a difficult and important problem in realistic image synthesis. While many specialized rendering techniques can efficiently resolve subsets of transport in specific media, no single approach can ...
Keywords: bidirectional path tracing, global illumination, light transport, participating media, photon beams, photon mapping

15 published by ACM
November 2013 SA '13: SIGGRAPH Asia 2013 Courses
Publisher: ACM
Bibliometrics:
Citation Count: 4
Downloads (6 Weeks): 3,   Downloads (12 Months): 14,   Downloads (Overall): 306

Full text available: PDFPDF
Photon density estimation techniques are a popular choice for simulating light transport in scenes with complicated geometry and materials. This class of algorithms can be used to accurately simulate inter-reflections, caustics, color bleeding, scattering in participating media and subsurface scattering. Since its introduction, photon density estimation has been significantly extended ...

16 published by ACM
November 2013 ACM Transactions on Graphics (TOG): Volume 32 Issue 6, November 2013
Publisher: ACM
Bibliometrics:
Citation Count: 23
Downloads (6 Weeks): 1,   Downloads (12 Months): 20,   Downloads (Overall): 411

Full text available: PDFPDF
Central to all Monte Carlo-based rendering algorithms is the construction of light transport paths from the light sources to the eye. Existing rendering approaches sample path vertices incrementally when constructing these light transport paths. The resulting probability density is thus a product of the conditional densities of each local sampling ...
Keywords: bidirectional path tracing, global illumination, importance sampling, many-light rendering methods, participating media, path tracing

17 published by ACM
November 2012 ACM Transactions on Graphics (TOG): Volume 31 Issue 6, November 2012
Publisher: ACM
Bibliometrics:
Citation Count: 51
Downloads (6 Weeks): 3,   Downloads (12 Months): 54,   Downloads (Overall): 929

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We present a new sampling space for light transport paths that makes it possible to describe Monte Carlo path integration and photon density estimation in the same framework. A key contribution of our paper is the introduction of vertex perturbations, which extends the space of paths with loosely coupled connections. ...
Keywords: global illumination, multiple importance sampling

18 published by ACM
August 2012 SIGGRAPH '12: ACM SIGGRAPH 2012 Posters
Publisher: ACM
Bibliometrics:
Citation Count: 0
Downloads (6 Weeks): 1,   Downloads (12 Months): 1,   Downloads (Overall): 56

Full text available: PDFPDF
Realistic image synthesis using path tracing needs many samples to achieve noise-free images. The noise is due to the use of Monte Carlo integration in path tracing. Since Monte Carlo integration evaluates each pixel using random sampling, we obtain noisy pixels at low sample counts. Due to the random nature ...

19 published by ACM
August 2012 SIGGRAPH '12: ACM SIGGRAPH 2012 Courses
Publisher: ACM
Bibliometrics:
Citation Count: 6
Downloads (6 Weeks): 6,   Downloads (12 Months): 54,   Downloads (Overall): 1,729

Full text available: PDFPDF
Photon-density estimation techniques are a popular choice for simulating light transport in scenes with complicated geometry and materials. This class of algorithms can be used to accurately simulate inter-reflections, caustics, color bleeding, scattering in participating media, and subsurface scattering. Since its introduction, photon-density estimation has been significantly extended in computer ...

20 published by ACM
October 2011 ACM Transactions on Graphics (TOG): Volume 30 Issue 5, October 2011
Publisher: ACM
Bibliometrics:
Citation Count: 20
Downloads (6 Weeks): 3,   Downloads (12 Months): 42,   Downloads (Overall): 2,808

Full text available: PDFPDF
We present a new adaptive photon tracing algorithm which can handle illumination settings that are considered difficult for photon tracing approaches such as outdoor scenes, close-ups of a small part of an illuminated region, and illumination coming through a small gap. The key contribution in our algorithm is the use ...
Keywords: Global illumination, adaptive sampling, density estimation, photon mapping



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