---
_id: '7418'
abstract:
- lang: eng
text: Multiple importance sampling (MIS) has become an indispensable tool in Monte
Carlo rendering, widely accepted as a near-optimal solution for combining different
sampling techniques. But an MIS combination, using the common balance or power
heuristics, often results in an overly defensive estimator, leading to high variance.
We show that by generalizing the MIS framework, variance can be substantially
reduced. Specifically, we optimize one of the combined sampling techniques so
as to decrease the overall variance of the resulting MIS estimator. We apply the
approach to the computation of direct illumination due to an HDR environment map
and to the computation of global illumination using a path guiding algorithm.
The implementation can be as simple as subtracting a constant value from the tabulated
sampling density done entirely in a preprocessing step. This produces a consistent
noise reduction in all our tests with no negative influence on run time, no artifacts
or bias, and no failure cases.
article_number: '151'
article_processing_charge: No
article_type: original
author:
- first_name: Ondřej
full_name: Karlík, Ondřej
last_name: Karlík
- first_name: Martin
full_name: Šik, Martin
last_name: Šik
- first_name: Petr
full_name: Vévoda, Petr
last_name: Vévoda
- first_name: Tomas
full_name: Skrivan, Tomas
id: 486A5A46-F248-11E8-B48F-1D18A9856A87
last_name: Skrivan
- first_name: Jaroslav
full_name: Křivánek, Jaroslav
last_name: Křivánek
citation:
ama: 'Karlík O, Šik M, Vévoda P, Skrivan T, Křivánek J. MIS compensation: Optimizing
sampling techniques in multiple importance sampling. ACM Transactions on Graphics.
2019;38(6). doi:10.1145/3355089.3356565'
apa: 'Karlík, O., Šik, M., Vévoda, P., Skrivan, T., & Křivánek, J. (2019). MIS
compensation: Optimizing sampling techniques in multiple importance sampling.
ACM Transactions on Graphics. ACM. https://doi.org/10.1145/3355089.3356565'
chicago: 'Karlík, Ondřej, Martin Šik, Petr Vévoda, Tomas Skrivan, and Jaroslav Křivánek.
“MIS Compensation: Optimizing Sampling Techniques in Multiple Importance Sampling.”
ACM Transactions on Graphics. ACM, 2019. https://doi.org/10.1145/3355089.3356565.'
ieee: 'O. Karlík, M. Šik, P. Vévoda, T. Skrivan, and J. Křivánek, “MIS compensation:
Optimizing sampling techniques in multiple importance sampling,” ACM Transactions
on Graphics, vol. 38, no. 6. ACM, 2019.'
ista: 'Karlík O, Šik M, Vévoda P, Skrivan T, Křivánek J. 2019. MIS compensation:
Optimizing sampling techniques in multiple importance sampling. ACM Transactions
on Graphics. 38(6), 151.'
mla: 'Karlík, Ondřej, et al. “MIS Compensation: Optimizing Sampling Techniques in
Multiple Importance Sampling.” ACM Transactions on Graphics, vol. 38, no.
6, 151, ACM, 2019, doi:10.1145/3355089.3356565.'
short: O. Karlík, M. Šik, P. Vévoda, T. Skrivan, J. Křivánek, ACM Transactions on
Graphics 38 (2019).
date_created: 2020-01-30T10:19:43Z
date_published: 2019-11-01T00:00:00Z
date_updated: 2023-09-06T15:22:23Z
day: '01'
department:
- _id: ChWo
doi: 10.1145/3355089.3356565
external_id:
isi:
- '000498397300001'
intvolume: ' 38'
isi: 1
issue: '6'
language:
- iso: eng
month: '11'
oa_version: None
publication: ACM Transactions on Graphics
publication_identifier:
eissn:
- 1557-7368
issn:
- 0730-0301
publication_status: published
publisher: ACM
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'MIS compensation: Optimizing sampling techniques in multiple importance sampling'
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 38
year: '2019'
...
---
_id: '6642'
abstract:
- lang: eng
text: We present a thermodynamically based approach to the design of models for
viscoelastic fluids with stress diffusion effect. In particular, we show how to
add a stress diffusion term to some standard viscoelastic rate-type models (Giesekus,
FENE-P, Johnson–Segalman, Phan-Thien–Tanner and Bautista–Manero–Puig) so that
the resulting models with the added stress diffusion term are thermodynamically
consistent in the sense that they obey the first and the second law of thermodynamics.
We point out the potential applications of the provided thermodynamical background
in the study of flows of fluids described by the proposed models.
article_number: '020002'
article_processing_charge: No
author:
- first_name: Mark
full_name: Dostalík, Mark
last_name: Dostalík
- first_name: Vít
full_name: Pruša, Vít
last_name: Pruša
- first_name: Tomas
full_name: Skrivan, Tomas
id: 486A5A46-F248-11E8-B48F-1D18A9856A87
last_name: Skrivan
citation:
ama: 'Dostalík M, Pruša V, Skrivan T. On diffusive variants of some classical viscoelastic
rate-type models. In: AIP Conference Proceedings. Vol 2107. AIP Publishing;
2019. doi:10.1063/1.5109493'
apa: 'Dostalík, M., Pruša, V., & Skrivan, T. (2019). On diffusive variants of
some classical viscoelastic rate-type models. In AIP Conference Proceedings
(Vol. 2107). Zlin, Czech Republic: AIP Publishing. https://doi.org/10.1063/1.5109493'
chicago: Dostalík, Mark, Vít Pruša, and Tomas Skrivan. “On Diffusive Variants of
Some Classical Viscoelastic Rate-Type Models.” In AIP Conference Proceedings,
Vol. 2107. AIP Publishing, 2019. https://doi.org/10.1063/1.5109493.
ieee: M. Dostalík, V. Pruša, and T. Skrivan, “On diffusive variants of some classical
viscoelastic rate-type models,” in AIP Conference Proceedings, Zlin, Czech
Republic, 2019, vol. 2107.
ista: Dostalík M, Pruša V, Skrivan T. 2019. On diffusive variants of some classical
viscoelastic rate-type models. AIP Conference Proceedings. 8th International Conference
on Novel Trends in Rheology vol. 2107, 020002.
mla: Dostalík, Mark, et al. “On Diffusive Variants of Some Classical Viscoelastic
Rate-Type Models.” AIP Conference Proceedings, vol. 2107, 020002, AIP Publishing,
2019, doi:10.1063/1.5109493.
short: M. Dostalík, V. Pruša, T. Skrivan, in:, AIP Conference Proceedings, AIP Publishing,
2019.
conference:
end_date: 2019-07-31
location: Zlin, Czech Republic
name: 8th International Conference on Novel Trends in Rheology
start_date: 2019-07-30
date_created: 2019-07-15T10:07:09Z
date_published: 2019-05-21T00:00:00Z
date_updated: 2024-02-28T13:01:28Z
day: '21'
department:
- _id: ChWo
doi: 10.1063/1.5109493
external_id:
arxiv:
- '1902.07983'
isi:
- '000479303100002'
intvolume: ' 2107'
isi: 1
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1902.07983
month: '05'
oa: 1
oa_version: Preprint
publication: AIP Conference Proceedings
publication_status: published
publisher: AIP Publishing
quality_controlled: '1'
scopus_import: '1'
status: public
title: On diffusive variants of some classical viscoelastic rate-type models
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 2107
year: '2019'
...
---
_id: '135'
abstract:
- lang: eng
text: The Fluid Implicit Particle method (FLIP) reduces numerical dissipation by
combining particles with grids. To improve performance, the subsequent narrow
band FLIP method (NB‐FLIP) uses a FLIP‐based fluid simulation only near the liquid
surface and a traditional grid‐based fluid simulation away from the surface. This
spatially‐limited FLIP simulation significantly reduces the number of particles
and alleviates a computational bottleneck. In this paper, we extend the NB‐FLIP
idea even further, by allowing a simulation to transition between a FLIP‐like
fluid simulation and a grid‐based simulation in arbitrary locations, not just
near the surface. This approach leads to even more savings in memory and computation,
because we can concentrate the particles only in areas where they are needed.
More importantly, this new method allows us to seamlessly transition to smooth
implicit surface geometry wherever the particle‐based simulation is unnecessary.
Consequently, our method leads to a practical algorithm for avoiding the noisy
surface artifacts associated with particle‐based liquid simulations, while simultaneously
maintaining the benefits of a FLIP simulation in regions of dynamic motion.
alternative_title:
- Eurographics
article_processing_charge: No
article_type: original
author:
- first_name: Takahiro
full_name: Sato, Takahiro
last_name: Sato
- first_name: Christopher J
full_name: Wojtan, Christopher J
id: 3C61F1D2-F248-11E8-B48F-1D18A9856A87
last_name: Wojtan
orcid: 0000-0001-6646-5546
- first_name: Nils
full_name: Thuerey, Nils
last_name: Thuerey
- first_name: Takeo
full_name: Igarashi, Takeo
last_name: Igarashi
- first_name: Ryoichi
full_name: Ando, Ryoichi
last_name: Ando
citation:
ama: Sato T, Wojtan C, Thuerey N, Igarashi T, Ando R. Extended narrow band FLIP
for liquid simulations. Computer Graphics Forum. 2018;37(2):169-177. doi:10.1111/cgf.13351
apa: Sato, T., Wojtan, C., Thuerey, N., Igarashi, T., & Ando, R. (2018). Extended
narrow band FLIP for liquid simulations. Computer Graphics Forum. Wiley.
https://doi.org/10.1111/cgf.13351
chicago: Sato, Takahiro, Chris Wojtan, Nils Thuerey, Takeo Igarashi, and Ryoichi
Ando. “Extended Narrow Band FLIP for Liquid Simulations.” Computer Graphics
Forum. Wiley, 2018. https://doi.org/10.1111/cgf.13351.
ieee: T. Sato, C. Wojtan, N. Thuerey, T. Igarashi, and R. Ando, “Extended narrow
band FLIP for liquid simulations,” Computer Graphics Forum, vol. 37, no.
2. Wiley, pp. 169–177, 2018.
ista: Sato T, Wojtan C, Thuerey N, Igarashi T, Ando R. 2018. Extended narrow band
FLIP for liquid simulations. Computer Graphics Forum. 37(2), 169–177.
mla: Sato, Takahiro, et al. “Extended Narrow Band FLIP for Liquid Simulations.”
Computer Graphics Forum, vol. 37, no. 2, Wiley, 2018, pp. 169–77, doi:10.1111/cgf.13351.
short: T. Sato, C. Wojtan, N. Thuerey, T. Igarashi, R. Ando, Computer Graphics Forum
37 (2018) 169–177.
date_created: 2018-12-11T11:44:49Z
date_published: 2018-05-22T00:00:00Z
date_updated: 2023-09-11T14:00:26Z
day: '22'
ddc:
- '006'
department:
- _id: ChWo
doi: 10.1111/cgf.13351
ec_funded: 1
external_id:
isi:
- '000434085600016'
file:
- access_level: open_access
checksum: 8edb90da8a72395eb5d970580e0925b6
content_type: application/pdf
creator: wojtan
date_created: 2020-10-08T08:38:23Z
date_updated: 2020-10-08T08:38:23Z
file_id: '8627'
file_name: exnbflip.pdf
file_size: 54309947
relation: main_file
success: 1
file_date_updated: 2020-10-08T08:38:23Z
has_accepted_license: '1'
intvolume: ' 37'
isi: 1
issue: '2'
language:
- iso: eng
month: '05'
oa: 1
oa_version: Submitted Version
page: 169 - 177
project:
- _id: 2533E772-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '638176'
name: Efficient Simulation of Natural Phenomena at Extremely Large Scales
publication: Computer Graphics Forum
publication_identifier:
issn:
- 0167-7055
publication_status: published
publisher: Wiley
quality_controlled: '1'
scopus_import: '1'
status: public
title: Extended narrow band FLIP for liquid simulations
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 37
year: '2018'
...
---
_id: '134'
abstract:
- lang: eng
text: "The current state of the art in real-time two-dimensional water wave simulation
requires developers to choose between efficient Fourier-based methods, which lack
interactions with moving obstacles, and finite-difference or finite element methods,
which handle environmental interactions but are significantly more expensive.
This paper attempts to bridge this long-standing gap between complexity and performance,
by proposing a new wave simulation method that can faithfully simulate wave interactions
with moving obstacles in real time while simultaneously preserving minute details
and accommodating very large simulation domains.\r\n\r\nPrevious methods for simulating
2D water waves directly compute the change in height of the water surface, a strategy
which imposes limitations based on the CFL condition (fast moving waves require
small time steps) and Nyquist's limit (small wave details require closely-spaced
simulation variables). This paper proposes a novel wavelet transformation that
discretizes the liquid motion in terms of amplitude-like functions that vary over
space, frequency, and direction, effectively generalizing Fourier-based methods
to handle local interactions. Because these new variables change much more slowly
over space than the original water height function, our change of variables drastically
reduces the limitations of the CFL condition and Nyquist limit, allowing us to
simulate highly detailed water waves at very large visual resolutions. Our discretization
is amenable to fast summation and easy to parallelize. We also present basic extensions
like pre-computed wave paths and two-way solid fluid coupling. Finally, we argue
that our discretization provides a convenient set of variables for artistic manipulation,
which we illustrate with a novel wave-painting interface."
acknowledged_ssus:
- _id: ScienComp
alternative_title:
- SIGGRAPH
article_number: '94'
article_processing_charge: No
author:
- first_name: Stefan
full_name: Jeschke, Stefan
id: 44D6411A-F248-11E8-B48F-1D18A9856A87
last_name: Jeschke
- first_name: Tomas
full_name: Skrivan, Tomas
id: 486A5A46-F248-11E8-B48F-1D18A9856A87
last_name: Skrivan
- first_name: Matthias
full_name: Mueller Fischer, Matthias
last_name: Mueller Fischer
- first_name: Nuttapong
full_name: Chentanez, Nuttapong
last_name: Chentanez
- first_name: Miles
full_name: Macklin, Miles
last_name: Macklin
- first_name: Christopher J
full_name: Wojtan, Christopher J
id: 3C61F1D2-F248-11E8-B48F-1D18A9856A87
last_name: Wojtan
orcid: 0000-0001-6646-5546
citation:
ama: Jeschke S, Skrivan T, Mueller Fischer M, Chentanez N, Macklin M, Wojtan C.
Water surface wavelets. ACM Transactions on Graphics. 2018;37(4). doi:10.1145/3197517.3201336
apa: Jeschke, S., Skrivan, T., Mueller Fischer, M., Chentanez, N., Macklin, M.,
& Wojtan, C. (2018). Water surface wavelets. ACM Transactions on Graphics.
ACM. https://doi.org/10.1145/3197517.3201336
chicago: Jeschke, Stefan, Tomas Skrivan, Matthias Mueller Fischer, Nuttapong Chentanez,
Miles Macklin, and Chris Wojtan. “Water Surface Wavelets.” ACM Transactions
on Graphics. ACM, 2018. https://doi.org/10.1145/3197517.3201336.
ieee: S. Jeschke, T. Skrivan, M. Mueller Fischer, N. Chentanez, M. Macklin, and
C. Wojtan, “Water surface wavelets,” ACM Transactions on Graphics, vol.
37, no. 4. ACM, 2018.
ista: Jeschke S, Skrivan T, Mueller Fischer M, Chentanez N, Macklin M, Wojtan C.
2018. Water surface wavelets. ACM Transactions on Graphics. 37(4), 94.
mla: Jeschke, Stefan, et al. “Water Surface Wavelets.” ACM Transactions on Graphics,
vol. 37, no. 4, 94, ACM, 2018, doi:10.1145/3197517.3201336.
short: S. Jeschke, T. Skrivan, M. Mueller Fischer, N. Chentanez, M. Macklin, C.
Wojtan, ACM Transactions on Graphics 37 (2018).
date_created: 2018-12-11T11:44:48Z
date_published: 2018-07-30T00:00:00Z
date_updated: 2024-02-28T13:58:51Z
day: '30'
ddc:
- '000'
department:
- _id: ChWo
doi: 10.1145/3197517.3201336
ec_funded: 1
external_id:
isi:
- '000448185000055'
file:
- access_level: open_access
checksum: db75ebabe2ec432bf41389e614d6ef62
content_type: application/pdf
creator: dernst
date_created: 2018-12-18T09:59:23Z
date_updated: 2020-07-14T12:44:45Z
file_id: '5744'
file_name: 2018_ACM_Jeschke.pdf
file_size: 22185016
relation: main_file
file_date_updated: 2020-07-14T12:44:45Z
has_accepted_license: '1'
intvolume: ' 37'
isi: 1
issue: '4'
language:
- iso: eng
month: '07'
oa: 1
oa_version: Published Version
project:
- _id: 2533E772-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '638176'
name: Efficient Simulation of Natural Phenomena at Extremely Large Scales
- _id: 2564DBCA-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '665385'
name: International IST Doctoral Program
publication: ACM Transactions on Graphics
publication_status: published
publisher: ACM
publist_id: '7789'
quality_controlled: '1'
related_material:
link:
- description: News on IST Homepage
relation: press_release
url: https://ist.ac.at/en/news/new-water-simulation-captures-small-details-even-in-large-scenes/
scopus_import: '1'
status: public
title: Water surface wavelets
tmp:
image: /images/cc_by_nc_sa.png
legal_code_url: https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode
name: Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC
BY-NC-SA 4.0)
short: CC BY-NC-SA (4.0)
type: journal_article
user_id: 2EBD1598-F248-11E8-B48F-1D18A9856A87
volume: 37
year: '2018'
...
---
_id: '470'
abstract:
- lang: eng
text: This paper presents a method for simulating water surface waves as a displacement
field on a 2D domain. Our method relies on Lagrangian particles that carry packets
of water wave energy; each packet carries information about an entire group of
wave trains, as opposed to only a single wave crest. Our approach is unconditionally
stable and can simulate high resolution geometric details. This approach also
presents a straightforward interface for artistic control, because it is essentially
a particle system with intuitive parameters like wavelength and amplitude. Our
implementation parallelizes well and runs in real time for moderately challenging
scenarios.
acknowledged_ssus:
- _id: ScienComp
article_number: '103'
article_processing_charge: Yes (in subscription journal)
article_type: original
author:
- first_name: Stefan
full_name: Jeschke, Stefan
id: 44D6411A-F248-11E8-B48F-1D18A9856A87
last_name: Jeschke
- first_name: Christopher J
full_name: Wojtan, Christopher J
id: 3C61F1D2-F248-11E8-B48F-1D18A9856A87
last_name: Wojtan
orcid: 0000-0001-6646-5546
citation:
ama: Jeschke S, Wojtan C. Water wave packets. ACM Transactions on Graphics.
2017;36(4). doi:10.1145/3072959.3073678
apa: Jeschke, S., & Wojtan, C. (2017). Water wave packets. ACM Transactions
on Graphics. ACM. https://doi.org/10.1145/3072959.3073678
chicago: Jeschke, Stefan, and Chris Wojtan. “Water Wave Packets.” ACM Transactions
on Graphics. ACM, 2017. https://doi.org/10.1145/3072959.3073678.
ieee: S. Jeschke and C. Wojtan, “Water wave packets,” ACM Transactions on Graphics,
vol. 36, no. 4. ACM, 2017.
ista: Jeschke S, Wojtan C. 2017. Water wave packets. ACM Transactions on Graphics.
36(4), 103.
mla: Jeschke, Stefan, and Chris Wojtan. “Water Wave Packets.” ACM Transactions
on Graphics, vol. 36, no. 4, 103, ACM, 2017, doi:10.1145/3072959.3073678.
short: S. Jeschke, C. Wojtan, ACM Transactions on Graphics 36 (2017).
date_created: 2018-12-11T11:46:39Z
date_published: 2017-07-01T00:00:00Z
date_updated: 2023-02-23T12:20:26Z
day: '01'
ddc:
- '006'
department:
- _id: ChWo
doi: 10.1145/3072959.3073678
ec_funded: 1
file:
- access_level: open_access
checksum: 82a3b2bfeee4ddef16ecc21675d1a48a
content_type: application/pdf
creator: wojtan
date_created: 2020-01-24T09:32:35Z
date_updated: 2020-07-14T12:46:34Z
file_id: '7359'
file_name: wavepackets_final.pdf
file_size: 13131683
relation: main_file
file_date_updated: 2020-07-14T12:46:34Z
has_accepted_license: '1'
intvolume: ' 36'
issue: '4'
language:
- iso: eng
month: '07'
oa: 1
oa_version: Published Version
project:
- _id: 2533E772-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '638176'
name: Efficient Simulation of Natural Phenomena at Extremely Large Scales
publication: ACM Transactions on Graphics
publication_identifier:
issn:
- '07300301'
publication_status: published
publisher: ACM
publist_id: '7350'
quality_controlled: '1'
scopus_import: 1
status: public
title: Water wave packets
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 36
year: '2017'
...
---
_id: '670'
abstract:
- lang: eng
text: We propose an efficient method to model paper tearing in the context of interactive
modeling. The method uses geometrical information to automatically detect potential
starting points of tears. We further introduce a new hybrid geometrical and physical-based
method to compute the trajectory of tears while procedurally synthesizing high
resolution details of the tearing path using a texture based approach. The results
obtained are compared with real paper and with previous studies on the expected
geometric paths of paper that tears.
article_processing_charge: No
article_type: original
author:
- first_name: Camille
full_name: Schreck, Camille
id: 2B14B676-F248-11E8-B48F-1D18A9856A87
last_name: Schreck
- first_name: Damien
full_name: Rohmer, Damien
last_name: Rohmer
- first_name: Stefanie
full_name: Hahmann, Stefanie
last_name: Hahmann
citation:
ama: Schreck C, Rohmer D, Hahmann S. Interactive paper tearing. Computer Graphics
Forum. 2017;36(2):95-106. doi:10.1111/cgf.13110
apa: Schreck, C., Rohmer, D., & Hahmann, S. (2017). Interactive paper tearing.
Computer Graphics Forum. Wiley. https://doi.org/10.1111/cgf.13110
chicago: Schreck, Camille, Damien Rohmer, and Stefanie Hahmann. “Interactive Paper
Tearing.” Computer Graphics Forum. Wiley, 2017. https://doi.org/10.1111/cgf.13110.
ieee: C. Schreck, D. Rohmer, and S. Hahmann, “Interactive paper tearing,” Computer
Graphics Forum, vol. 36, no. 2. Wiley, pp. 95–106, 2017.
ista: Schreck C, Rohmer D, Hahmann S. 2017. Interactive paper tearing. Computer
Graphics Forum. 36(2), 95–106.
mla: Schreck, Camille, et al. “Interactive Paper Tearing.” Computer Graphics
Forum, vol. 36, no. 2, Wiley, 2017, pp. 95–106, doi:10.1111/cgf.13110.
short: C. Schreck, D. Rohmer, S. Hahmann, Computer Graphics Forum 36 (2017) 95–106.
date_created: 2018-12-11T11:47:49Z
date_published: 2017-05-01T00:00:00Z
date_updated: 2021-01-12T08:08:37Z
day: '01'
ddc:
- '000'
department:
- _id: ChWo
doi: 10.1111/cgf.13110
intvolume: ' 36'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://hal.inria.fr/hal-01647113/file/eg_2017_schreck_paper_tearing.pdf
month: '05'
oa: 1
oa_version: Published Version
page: 95 - 106
project:
- _id: 25357BD2-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: P 24352-N23
name: 'Deep Pictures: Creating Visual and Haptic Vector Images'
publication: Computer Graphics Forum
publication_identifier:
issn:
- '01677055'
publication_status: published
publisher: Wiley
publist_id: '7056'
quality_controlled: '1'
scopus_import: 1
status: public
title: Interactive paper tearing
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 36
year: '2017'
...
---
_id: '1367'
abstract:
- lang: eng
text: One of the major challenges in physically based modelling is making simulations
efficient. Adaptive models provide an essential solution to these efficiency goals.
These models are able to self-adapt in space and time, attempting to provide the
best possible compromise between accuracy and speed. This survey reviews the adaptive
solutions proposed so far in computer graphics. Models are classified according
to the strategy they use for adaptation, from time-stepping and freezing techniques
to geometric adaptivity in the form of structured grids, meshes and particles.
Applications range from fluids, through deformable bodies, to articulated solids.
acknowledgement: This work was partly supported by the starting grants ADAPT and BigSplash,
as well as the advanced grant EXPRESSIVE from the European Research Council (ERC-2012-StG_20111012,
ERC-2014-StG_638176 and ERC-2011-ADG_20110209).
article_processing_charge: No
author:
- first_name: Pierre
full_name: Manteaux, Pierre
last_name: Manteaux
- first_name: Christopher J
full_name: Wojtan, Christopher J
id: 3C61F1D2-F248-11E8-B48F-1D18A9856A87
last_name: Wojtan
orcid: 0000-0001-6646-5546
- first_name: Rahul
full_name: Narain, Rahul
last_name: Narain
- first_name: Stéphane
full_name: Redon, Stéphane
last_name: Redon
- first_name: François
full_name: Faure, François
last_name: Faure
- first_name: Marie
full_name: Cani, Marie
last_name: Cani
citation:
ama: Manteaux P, Wojtan C, Narain R, Redon S, Faure F, Cani M. Adaptive physically
based models in computer graphics. Computer Graphics Forum. 2017;36(6):312-337.
doi:10.1111/cgf.12941
apa: Manteaux, P., Wojtan, C., Narain, R., Redon, S., Faure, F., & Cani, M.
(2017). Adaptive physically based models in computer graphics. Computer Graphics
Forum. Wiley-Blackwell. https://doi.org/10.1111/cgf.12941
chicago: Manteaux, Pierre, Chris Wojtan, Rahul Narain, Stéphane Redon, François
Faure, and Marie Cani. “Adaptive Physically Based Models in Computer Graphics.”
Computer Graphics Forum. Wiley-Blackwell, 2017. https://doi.org/10.1111/cgf.12941.
ieee: P. Manteaux, C. Wojtan, R. Narain, S. Redon, F. Faure, and M. Cani, “Adaptive
physically based models in computer graphics,” Computer Graphics Forum,
vol. 36, no. 6. Wiley-Blackwell, pp. 312–337, 2017.
ista: Manteaux P, Wojtan C, Narain R, Redon S, Faure F, Cani M. 2017. Adaptive physically
based models in computer graphics. Computer Graphics Forum. 36(6), 312–337.
mla: Manteaux, Pierre, et al. “Adaptive Physically Based Models in Computer Graphics.”
Computer Graphics Forum, vol. 36, no. 6, Wiley-Blackwell, 2017, pp. 312–37,
doi:10.1111/cgf.12941.
short: P. Manteaux, C. Wojtan, R. Narain, S. Redon, F. Faure, M. Cani, Computer
Graphics Forum 36 (2017) 312–337.
date_created: 2018-12-11T11:51:37Z
date_published: 2017-09-01T00:00:00Z
date_updated: 2023-09-20T11:05:36Z
day: '01'
ddc:
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department:
- _id: ChWo
doi: 10.1111/cgf.12941
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isi:
- '000408634200019'
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creator: system
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date_updated: 2020-07-14T12:44:47Z
file_id: '5208'
file_name: IST-2016-634-v1+1_starAdaptivity-cgf.pdf
file_size: 1434439
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file_date_updated: 2020-07-14T12:44:47Z
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issue: '6'
language:
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oa: 1
oa_version: Submitted Version
page: 312 - 337
publication: Computer Graphics Forum
publication_identifier:
issn:
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publication_status: published
publisher: Wiley-Blackwell
publist_id: '5873'
pubrep_id: '634'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Adaptive physically based models in computer graphics
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 36
year: '2017'
...
---
_id: '1152'
abstract:
- lang: eng
text: We propose a new memetic strategy that can solve the multi-physics, complex
inverse problems, formulated as the multi-objective optimization ones, in which
objectives are misfits between the measured and simulated states of various governing
processes. The multi-deme structure of the strategy allows for both, intensive,
relatively cheap exploration with a moderate accuracy and more accurate search
many regions of Pareto set in parallel. The special type of selection operator
prefers the coherent alternative solutions, eliminating artifacts appearing in
the particular processes. The additional accuracy increment is obtained by the
parallel convex searches applied to the local scalarizations of the misfit vector.
The strategy is dedicated for solving ill-conditioned problems, for which inverting
the single physical process can lead to the ambiguous results. The skill of the
selection in artifact elimination is shown on the benchmark problem, while the
whole strategy was applied for identification of oil deposits, where the misfits
are related to various frequencies of the magnetic and electric waves of the magnetotelluric
measurements. 2016 Elsevier B.V.
article_processing_charge: No
author:
- first_name: Ewa P
full_name: Gajda-Zagorska, Ewa P
id: 47794CF0-F248-11E8-B48F-1D18A9856A87
last_name: Gajda-Zagorska
- first_name: Robert
full_name: Schaefer, Robert
last_name: Schaefer
- first_name: Maciej
full_name: Smołka, Maciej
last_name: Smołka
- first_name: David
full_name: Pardo, David
last_name: Pardo
- first_name: Julen
full_name: Alvarez Aramberri, Julen
last_name: Alvarez Aramberri
citation:
ama: Gajda-Zagorska EP, Schaefer R, Smołka M, Pardo D, Alvarez Aramberri J. A multi
objective memetic inverse solver reinforced by local optimization methods. Journal
of Computational Science. 2017;18:85-94. doi:10.1016/j.jocs.2016.06.007
apa: Gajda-Zagorska, E. P., Schaefer, R., Smołka, M., Pardo, D., & Alvarez Aramberri,
J. (2017). A multi objective memetic inverse solver reinforced by local optimization
methods. Journal of Computational Science. Elsevier. https://doi.org/10.1016/j.jocs.2016.06.007
chicago: Gajda-Zagorska, Ewa P, Robert Schaefer, Maciej Smołka, David Pardo, and
Julen Alvarez Aramberri. “A Multi Objective Memetic Inverse Solver Reinforced
by Local Optimization Methods.” Journal of Computational Science. Elsevier,
2017. https://doi.org/10.1016/j.jocs.2016.06.007.
ieee: E. P. Gajda-Zagorska, R. Schaefer, M. Smołka, D. Pardo, and J. Alvarez Aramberri,
“A multi objective memetic inverse solver reinforced by local optimization methods,”
Journal of Computational Science, vol. 18. Elsevier, pp. 85–94, 2017.
ista: Gajda-Zagorska EP, Schaefer R, Smołka M, Pardo D, Alvarez Aramberri J. 2017.
A multi objective memetic inverse solver reinforced by local optimization methods.
Journal of Computational Science. 18, 85–94.
mla: Gajda-Zagorska, Ewa P., et al. “A Multi Objective Memetic Inverse Solver Reinforced
by Local Optimization Methods.” Journal of Computational Science, vol.
18, Elsevier, 2017, pp. 85–94, doi:10.1016/j.jocs.2016.06.007.
short: E.P. Gajda-Zagorska, R. Schaefer, M. Smołka, D. Pardo, J. Alvarez Aramberri,
Journal of Computational Science 18 (2017) 85–94.
date_created: 2018-12-11T11:50:26Z
date_published: 2017-01-01T00:00:00Z
date_updated: 2023-09-20T11:29:44Z
day: '01'
ddc:
- '000'
department:
- _id: ChWo
doi: 10.1016/j.jocs.2016.06.007
external_id:
isi:
- '000393528700009'
file:
- access_level: open_access
content_type: application/pdf
creator: dernst
date_created: 2019-01-18T08:43:16Z
date_updated: 2019-01-18T08:43:16Z
file_id: '5842'
file_name: 2016_jocs_ewa.pdf
file_size: 1083911
relation: main_file
success: 1
file_date_updated: 2019-01-18T08:43:16Z
has_accepted_license: '1'
intvolume: ' 18'
isi: 1
language:
- iso: eng
month: '01'
oa: 1
oa_version: Submitted Version
page: 85 - 94
publication: Journal of Computational Science
publication_identifier:
issn:
- '18777503'
publication_status: published
publisher: Elsevier
publist_id: '6206'
quality_controlled: '1'
scopus_import: '1'
status: public
title: A multi objective memetic inverse solver reinforced by local optimization methods
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 18
year: '2017'
...
---
_id: '998'
abstract:
- lang: eng
text: 'A major open problem on the road to artificial intelligence is the development
of incrementally learning systems that learn about more and more concepts over
time from a stream of data. In this work, we introduce a new training strategy,
iCaRL, that allows learning in such a class-incremental way: only the training
data for a small number of classes has to be present at the same time and new
classes can be added progressively. iCaRL learns strong classifiers and a data
representation simultaneously. This distinguishes it from earlier works that were
fundamentally limited to fixed data representations and therefore incompatible
with deep learning architectures. We show by experiments on CIFAR-100 and ImageNet
ILSVRC 2012 data that iCaRL can learn many classes incrementally over a long period
of time where other strategies quickly fail. '
article_processing_charge: No
author:
- first_name: Sylvestre Alvise
full_name: Rebuffi, Sylvestre Alvise
last_name: Rebuffi
- first_name: Alexander
full_name: Kolesnikov, Alexander
id: 2D157DB6-F248-11E8-B48F-1D18A9856A87
last_name: Kolesnikov
- first_name: Georg
full_name: Sperl, Georg
id: 4DD40360-F248-11E8-B48F-1D18A9856A87
last_name: Sperl
- first_name: Christoph
full_name: Lampert, Christoph
id: 40C20FD2-F248-11E8-B48F-1D18A9856A87
last_name: Lampert
orcid: 0000-0001-8622-7887
citation:
ama: 'Rebuffi SA, Kolesnikov A, Sperl G, Lampert C. iCaRL: Incremental classifier
and representation learning. In: Vol 2017. IEEE; 2017:5533-5542. doi:10.1109/CVPR.2017.587'
apa: 'Rebuffi, S. A., Kolesnikov, A., Sperl, G., & Lampert, C. (2017). iCaRL:
Incremental classifier and representation learning (Vol. 2017, pp. 5533–5542).
Presented at the CVPR: Computer Vision and Pattern Recognition, Honolulu, HA,
United States: IEEE. https://doi.org/10.1109/CVPR.2017.587'
chicago: 'Rebuffi, Sylvestre Alvise, Alexander Kolesnikov, Georg Sperl, and Christoph
Lampert. “ICaRL: Incremental Classifier and Representation Learning,” 2017:5533–42.
IEEE, 2017. https://doi.org/10.1109/CVPR.2017.587.'
ieee: 'S. A. Rebuffi, A. Kolesnikov, G. Sperl, and C. Lampert, “iCaRL: Incremental
classifier and representation learning,” presented at the CVPR: Computer Vision
and Pattern Recognition, Honolulu, HA, United States, 2017, vol. 2017, pp. 5533–5542.'
ista: 'Rebuffi SA, Kolesnikov A, Sperl G, Lampert C. 2017. iCaRL: Incremental classifier
and representation learning. CVPR: Computer Vision and Pattern Recognition vol.
2017, 5533–5542.'
mla: 'Rebuffi, Sylvestre Alvise, et al. ICaRL: Incremental Classifier and Representation
Learning. Vol. 2017, IEEE, 2017, pp. 5533–42, doi:10.1109/CVPR.2017.587.'
short: S.A. Rebuffi, A. Kolesnikov, G. Sperl, C. Lampert, in:, IEEE, 2017, pp. 5533–5542.
conference:
end_date: 2017-07-26
location: Honolulu, HA, United States
name: 'CVPR: Computer Vision and Pattern Recognition'
start_date: 2017-07-21
date_created: 2018-12-11T11:49:37Z
date_published: 2017-04-14T00:00:00Z
date_updated: 2023-09-22T09:51:58Z
day: '14'
department:
- _id: ChLa
- _id: ChWo
doi: 10.1109/CVPR.2017.587
ec_funded: 1
external_id:
isi:
- '000418371405066'
intvolume: ' 2017'
isi: 1
language:
- iso: eng
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url: https://arxiv.org/abs/1611.07725
month: '04'
oa: 1
oa_version: Submitted Version
page: 5533 - 5542
project:
- _id: 2532554C-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '308036'
name: Lifelong Learning of Visual Scene Understanding
publication_identifier:
isbn:
- 978-153860457-1
publication_status: published
publisher: IEEE
publist_id: '6400'
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'iCaRL: Incremental classifier and representation learning'
type: conference
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 2017
year: '2017'
...
---
_id: '839'
abstract:
- lang: eng
text: 'This thesis describes a brittle fracture simulation method for visual effects
applications. Building upon a symmetric Galerkin boundary element method, we first
compute stress intensity factors following the theory of linear elastic fracture
mechanics. We then use these stress intensities to simulate the motion of a propagating
crack front at a significantly higher resolution than the overall deformation
of the breaking object. Allowing for spatial variations of the material''s toughness
during crack propagation produces visually realistic, highly-detailed fracture
surfaces. Furthermore, we introduce approximations for stress intensities and
crack opening displacements, resulting in both practical speed-up and theoretically
superior runtime complexity compared to previous methods. While we choose a quasi-static
approach to fracture mechanics, ignoring dynamic deformations, we also couple
our fracture simulation framework to a standard rigid-body dynamics solver, enabling
visual effects artists to simulate both large scale motion, as well as fracturing
due to collision forces in a combined system. As fractures inside of an object
grow, their geometry must be represented both in the coarse boundary element mesh,
as well as at the desired fine output resolution. Using a boundary element method,
we avoid complicated volumetric meshing operations. Instead we describe a simple
set of surface meshing operations that allow us to progressively add cracks to
the mesh of an object and still re-use all previously computed entries of the
linear boundary element system matrix. On the high resolution level, we opt for
an implicit surface representation. We then describe how to capture fracture surfaces
during crack propagation, as well as separate the individual fragments resulting
from the fracture process, based on this implicit representation. We show results
obtained with our method, either solving the full boundary element system in every
time step, or alternatively using our fast approximations. These results demonstrate
that both of these methods perform well in basic test cases and produce realistic
fracture surfaces. Furthermore we show that our fast approximations substantially
out-perform the standard approach in more demanding scenarios. Finally, these
two methods naturally combine, using the full solution while the problem size
is manageably small and switching to the fast approximations later on. The resulting
hybrid method gives the user a direct way to choose between speed and accuracy
of the simulation. '
acknowledgement: "ERC H2020 programme (grant agreement no. 638176)\r\nFirst of all,
let me thank my committee members, especially my supervisor, Chris\r\nWojtan, for
supporting me throughout my PhD. Obviously, none of this work would\r\nhave been
possible without you.\r\nFurthermore, Thank You to all the people who have contributed
to this work in various\r\nways, in particular Martin Schanz and his group for providing
and supporting the\r\nHyENA boundary element library, as well as Eder Miguel and
Morten Bojsen-Hansen\r\nfor (repeatedly) proof reading and providing valuable suggestions
during the writing\r\nof this thesis.\r\nI would also like to thank Bernd Bickel,
and all the members – past and present – of his\r\nand Chris’ research groups at
IST Austria for always providing honest and insightful\r\nfeedback throughout many
joint group meetings, as well as Christopher Batty, Eitan\r\nGrinspun, and Fang
Da for many insights into boundary element methods during our\r\ncollaboration.\r\nAs
only virtual objects have been harmed in the process of creating this work, I would\r\nlike
to acknowledge the Stanford scanning repository for providing the “Bunny” and\r\n“Armadillo”
models, the AIM@SHAPE repository for “Pierre’s hand, watertight”, and\r\nS. Gainsbourg
for the “Column” via Archive3D.net. Sorry for breaking these models\r\nin many different
ways.\r\n"
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: David
full_name: Hahn, David
id: 357A6A66-F248-11E8-B48F-1D18A9856A87
last_name: Hahn
citation:
ama: Hahn D. Brittle fracture simulation with boundary elements for computer graphics.
2017. doi:10.15479/AT:ISTA:th_855
apa: Hahn, D. (2017). Brittle fracture simulation with boundary elements for
computer graphics. Institute of Science and Technology Austria. https://doi.org/10.15479/AT:ISTA:th_855
chicago: Hahn, David. “Brittle Fracture Simulation with Boundary Elements for Computer
Graphics.” Institute of Science and Technology Austria, 2017. https://doi.org/10.15479/AT:ISTA:th_855.
ieee: D. Hahn, “Brittle fracture simulation with boundary elements for computer
graphics,” Institute of Science and Technology Austria, 2017.
ista: Hahn D. 2017. Brittle fracture simulation with boundary elements for computer
graphics. Institute of Science and Technology Austria.
mla: Hahn, David. Brittle Fracture Simulation with Boundary Elements for Computer
Graphics. Institute of Science and Technology Austria, 2017, doi:10.15479/AT:ISTA:th_855.
short: D. Hahn, Brittle Fracture Simulation with Boundary Elements for Computer
Graphics, Institute of Science and Technology Austria, 2017.
date_created: 2018-12-11T11:48:47Z
date_published: 2017-08-14T00:00:00Z
date_updated: 2024-02-21T13:48:02Z
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- '005'
- '006'
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- _id: 2533E772-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '638176'
name: Efficient Simulation of Natural Phenomena at Extremely Large Scales
publication_identifier:
issn:
- 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
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record:
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relation: part_of_dissertation
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- id: '5568'
relation: popular_science
status: public
status: public
supervisor:
- first_name: Christopher J
full_name: Wojtan, Christopher J
id: 3C61F1D2-F248-11E8-B48F-1D18A9856A87
last_name: Wojtan
orcid: 0000-0001-6646-5546
title: Brittle fracture simulation with boundary elements for computer graphics
tmp:
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name: Creative Commons Attribution-ShareAlike 4.0 International Public License (CC
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short: CC BY-SA (4.0)
type: dissertation
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
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...