---
_id: '1319'
abstract:
- lang: eng
text: We present a novel optimization-based algorithm for the design and fabrication
of customized, deformable input devices, capable of continuously sensing their
deformation. We propose to embed piezoresistive sensing elements into flexible
3D printed objects. These sensing elements are then utilized to recover rich and
natural user interactions at runtime. Designing such objects is a challenging
and hard problem if attempted manually for all but the simplest geometries and
deformations. Our method simultaneously optimizes the internal routing of the
sensing elements and computes a mapping from low-level sensor readings to user-specified
outputs in order to minimize reconstruction error. We demonstrate the power and
flexibility of the approach by designing and fabricating a set of flexible input
devices. Our results indicate that the optimization-based design greatly outperforms
manual routings in terms of reconstruction accuracy and thus interaction fidelity.
acknowledgement: "We thank Damian Karrer, Rocco Ghielmini and Jemin\r\nHwangbo
for their help in our initial explorations. We would\r\nlike to thank Christian
Schumacher for creating the video and\r\nC\r\n ́\r\necile Edwards-Rietmann for providing
the voiceover. Mau-\r\nrizio Nitti helped us in designing our 3D characters. We
thank\r\nChiara Daraio for insightful discussions on material proper-\r\nties and
3D printing. We also thank the CHI reviewers for\r\ntheir feedback and guidance.
Fabrizio Pece was supported by\r\nan ETH/Marie Curie fellowship (FEL-3314-1)."
author:
- first_name: Moritz
full_name: Bächer, Moritz
last_name: Bächer
- first_name: Benjamin
full_name: Hepp, Benjamin
last_name: Hepp
- first_name: Fabrizio
full_name: Pece, Fabrizio
last_name: Pece
- first_name: Paul
full_name: Kry, Paul
last_name: Kry
- first_name: Bernd
full_name: Bickel, Bernd
id: 49876194-F248-11E8-B48F-1D18A9856A87
last_name: Bickel
orcid: 0000-0001-6511-9385
- first_name: Bernhard
full_name: Thomaszewski, Bernhard
last_name: Thomaszewski
- first_name: Otmar
full_name: Hilliges, Otmar
last_name: Hilliges
citation:
ama: 'Bächer M, Hepp B, Pece F, et al. DefSense: computational design of customized
deformable input devices. In: ACM; 2016:3806-3816. doi:10.1145/2858036.2858354'
apa: 'Bächer, M., Hepp, B., Pece, F., Kry, P., Bickel, B., Thomaszewski, B., &
Hilliges, O. (2016). DefSense: computational design of customized deformable input
devices (pp. 3806–3816). Presented at the CHI: Conference on Human Factors in
Computing Systems, San Jose, California, USA: ACM. https://doi.org/10.1145/2858036.2858354'
chicago: 'Bächer, Moritz, Benjamin Hepp, Fabrizio Pece, Paul Kry, Bernd Bickel,
Bernhard Thomaszewski, and Otmar Hilliges. “DefSense: Computational Design of
Customized Deformable Input Devices,” 3806–16. ACM, 2016. https://doi.org/10.1145/2858036.2858354.'
ieee: 'M. Bächer et al., “DefSense: computational design of customized deformable
input devices,” presented at the CHI: Conference on Human Factors in Computing
Systems, San Jose, California, USA, 2016, pp. 3806–3816.'
ista: 'Bächer M, Hepp B, Pece F, Kry P, Bickel B, Thomaszewski B, Hilliges O. 2016.
DefSense: computational design of customized deformable input devices. CHI: Conference
on Human Factors in Computing Systems, 3806–3816.'
mla: 'Bächer, Moritz, et al. DefSense: Computational Design of Customized Deformable
Input Devices. ACM, 2016, pp. 3806–16, doi:10.1145/2858036.2858354.'
short: M. Bächer, B. Hepp, F. Pece, P. Kry, B. Bickel, B. Thomaszewski, O. Hilliges,
in:, ACM, 2016, pp. 3806–3816.
conference:
end_date: 2016-05-12
location: San Jose, California, USA
name: 'CHI: Conference on Human Factors in Computing Systems'
start_date: 2016-05-07
date_created: 2018-12-11T11:51:21Z
date_published: 2016-05-07T00:00:00Z
date_updated: 2021-01-12T06:49:51Z
day: '07'
department:
- _id: BeBi
doi: 10.1145/2858036.2858354
language:
- iso: eng
month: '05'
oa_version: None
page: 3806 - 3816
publication_status: published
publisher: ACM
publist_id: '5951'
quality_controlled: '1'
scopus_import: 1
status: public
title: 'DefSense: computational design of customized deformable input devices'
type: conference
user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
year: '2016'
...
---
_id: '1364'
abstract:
- lang: eng
text: We present a computational method for designing wire sculptures consisting
of interlocking wires. Our method allows the computation of aesthetically pleasing
structures that are structurally stable, efficiently fabricatable with a 2D wire
bending machine, and assemblable without the need of additional connectors. Starting
from a set of planar contours provided by the user, our method automatically tests
for the feasibility of a design, determines a discrete ordering of wires at intersection
points, and optimizes for the rest shape of the individual wires to maximize structural
stability under frictional contact. In addition to their application to art, wire
sculptures present an extremely efficient and fast alternative for low-fidelity
rapid prototyping because manufacturing time and required material linearly scales
with the physical size of objects. We demonstrate the effectiveness of our approach
on a varied set of examples, all of which we fabricated.
acknowledgement: This project has received funding from the European Union’s Horizon
2020 research and innovation programme under grant agreement No 645599.
alternative_title:
- ACM Transactions on Graphics
article_number: '86'
author:
- first_name: Eder
full_name: Miguel Villalba, Eder
id: 3FB91342-F248-11E8-B48F-1D18A9856A87
last_name: Miguel Villalba
- first_name: Mathias
full_name: Lepoutre, Mathias
last_name: Lepoutre
- first_name: Bernd
full_name: Bickel, Bernd
id: 49876194-F248-11E8-B48F-1D18A9856A87
last_name: Bickel
orcid: 0000-0001-6511-9385
citation:
ama: 'Miguel Villalba E, Lepoutre M, Bickel B. Computational design of stable planar-rod
structures. In: Vol 35. ACM; 2016. doi:10.1145/2897824.2925978'
apa: 'Miguel Villalba, E., Lepoutre, M., & Bickel, B. (2016). Computational
design of stable planar-rod structures (Vol. 35). Presented at the ACM SIGGRAPH,
Anaheim, CA, USA: ACM. https://doi.org/10.1145/2897824.2925978'
chicago: Miguel Villalba, Eder, Mathias Lepoutre, and Bernd Bickel. “Computational
Design of Stable Planar-Rod Structures,” Vol. 35. ACM, 2016. https://doi.org/10.1145/2897824.2925978.
ieee: E. Miguel Villalba, M. Lepoutre, and B. Bickel, “Computational design of stable
planar-rod structures,” presented at the ACM SIGGRAPH, Anaheim, CA, USA, 2016,
vol. 35, no. 4.
ista: Miguel Villalba E, Lepoutre M, Bickel B. 2016. Computational design of stable
planar-rod structures. ACM SIGGRAPH, ACM Transactions on Graphics, vol. 35, 86.
mla: Miguel Villalba, Eder, et al. Computational Design of Stable Planar-Rod
Structures. Vol. 35, no. 4, 86, ACM, 2016, doi:10.1145/2897824.2925978.
short: E. Miguel Villalba, M. Lepoutre, B. Bickel, in:, ACM, 2016.
conference:
end_date: 2016-07-28
location: Anaheim, CA, USA
name: ACM SIGGRAPH
start_date: 2016-07-24
date_created: 2018-12-11T11:51:36Z
date_published: 2016-07-01T00:00:00Z
date_updated: 2021-01-12T06:50:10Z
day: '01'
ddc:
- '006'
department:
- _id: BeBi
doi: 10.1145/2897824.2925978
ec_funded: 1
file:
- access_level: open_access
checksum: d00c2664a43d945df8876ea0193734e3
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:11:01Z
date_updated: 2020-07-14T12:44:47Z
file_id: '4853'
file_name: IST-2017-763-v1+1_wirebending.pdf
file_size: 44766392
relation: main_file
file_date_updated: 2020-07-14T12:44:47Z
has_accepted_license: '1'
intvolume: ' 35'
issue: '4'
language:
- iso: eng
month: '07'
oa: 1
oa_version: Preprint
project:
- _id: 25082902-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '645599'
name: Soft-bodied intelligence for Manipulation
publication_status: published
publisher: ACM
publist_id: '5878'
pubrep_id: '763'
quality_controlled: '1'
scopus_import: 1
status: public
title: Computational design of stable planar-rod structures
type: conference
user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
volume: 35
year: '2016'
...
---
_id: '1414'
abstract:
- lang: eng
text: In this paper, we present a method to model hyperelasticity that is well suited
for representing the nonlinearity of real-world objects, as well as for estimating
it from deformation examples. Previous approaches suffer several limitations,
such as lack of integrability of elastic forces, failure to enforce energy convexity,
lack of robustness of parameter estimation, or difficulty to model cross-modal
effects. Our method avoids these problems by relying on a general energy-based
definition of elastic properties. The accuracy of the resulting elastic model
is maximized by defining an additive model of separable energy terms, which allow
progressive parameter estimation. In addition, our method supports efficient modeling
of extreme nonlinearities thanks to energy-limiting constraints. We combine our
energy-based model with an optimization method to estimate model parameters from
force-deformation examples, and we show successful modeling of diverse deformable
objects, including cloth, human finger skin, and internal human anatomy in a medical
imaging application.
acknowledgement: This work was funded in part by grants from the Spanish Ministry
of Economy (TIN2012-35840), the European Research Council (ERC Starting Grant no.
280135 Animetrics), and the EU FP7 (project no. 601165 WEARHAP).
author:
- first_name: Eder
full_name: Miguel Villalba, Eder
id: 3FB91342-F248-11E8-B48F-1D18A9856A87
last_name: Miguel Villalba
- first_name: David
full_name: Miraut, David
last_name: Miraut
- first_name: Miguel
full_name: Otaduy, Miguel
last_name: Otaduy
citation:
ama: Miguel Villalba E, Miraut D, Otaduy M. Modeling and estimation of energy-based
hyperelastic objects. Computer Graphics Forum. 2016;35(2):385-396. doi:10.1111/cgf.12840
apa: Miguel Villalba, E., Miraut, D., & Otaduy, M. (2016). Modeling and estimation
of energy-based hyperelastic objects. Computer Graphics Forum. Wiley-Blackwell.
https://doi.org/10.1111/cgf.12840
chicago: Miguel Villalba, Eder, David Miraut, and Miguel Otaduy. “Modeling and Estimation
of Energy-Based Hyperelastic Objects.” Computer Graphics Forum. Wiley-Blackwell,
2016. https://doi.org/10.1111/cgf.12840.
ieee: E. Miguel Villalba, D. Miraut, and M. Otaduy, “Modeling and estimation of
energy-based hyperelastic objects,” Computer Graphics Forum, vol. 35, no.
2. Wiley-Blackwell, pp. 385–396, 2016.
ista: Miguel Villalba E, Miraut D, Otaduy M. 2016. Modeling and estimation of energy-based
hyperelastic objects. Computer Graphics Forum. 35(2), 385–396.
mla: Miguel Villalba, Eder, et al. “Modeling and Estimation of Energy-Based Hyperelastic
Objects.” Computer Graphics Forum, vol. 35, no. 2, Wiley-Blackwell, 2016,
pp. 385–96, doi:10.1111/cgf.12840.
short: E. Miguel Villalba, D. Miraut, M. Otaduy, Computer Graphics Forum 35 (2016)
385–396.
date_created: 2018-12-11T11:51:53Z
date_published: 2016-05-01T00:00:00Z
date_updated: 2021-01-12T06:50:35Z
day: '01'
department:
- _id: BeBi
doi: 10.1111/cgf.12840
intvolume: ' 35'
issue: '2'
language:
- iso: eng
month: '05'
oa_version: None
page: 385 - 396
publication: Computer Graphics Forum
publication_status: published
publisher: Wiley-Blackwell
publist_id: '5792'
quality_controlled: '1'
scopus_import: 1
status: public
title: Modeling and estimation of energy-based hyperelastic objects
type: journal_article
user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
volume: 35
year: '2016'
...
---
_id: '1625'
abstract:
- lang: eng
text: In recent years we have seen numerous improvements on 3D scanning and tracking
of human faces, greatly advancing the creation of digital doubles for film and
video games. However, despite the high-resolution quality of the reconstruction
approaches available, current methods are unable to capture one of the most important
regions of the face - the eye region. In this work we present the first method
for detailed spatio-temporal reconstruction of eyelids. Tracking and reconstructing
eyelids is extremely challenging, as this region exhibits very complex and unique
skin deformation where skin is folded under while opening the eye. Furthermore,
eyelids are often only partially visible and obstructed due to selfocclusion and
eyelashes. Our approach is to combine a geometric deformation model with image
data, leveraging multi-view stereo, optical flow, contour tracking and wrinkle
detection from local skin appearance. Our deformation model serves as a prior
that enables reconstruction of eyelids even under strong self-occlusions caused
by rolling and folding skin as the eye opens and closes. The output is a person-specific,
time-varying eyelid reconstruction with anatomically plausible deformations. Our
high-resolution detailed eyelids couple naturally with current facial performance
capture approaches. As a result, our method can largely increase the fidelity
of facial capture and the creation of digital doubles.
article_number: '44'
author:
- first_name: Amit
full_name: Bermano, Amit
last_name: Bermano
- first_name: Thabo
full_name: Beeler, Thabo
last_name: Beeler
- first_name: Yeara
full_name: Kozlov, Yeara
last_name: Kozlov
- first_name: Derek
full_name: Bradley, Derek
last_name: Bradley
- first_name: Bernd
full_name: Bickel, Bernd
id: 49876194-F248-11E8-B48F-1D18A9856A87
last_name: Bickel
orcid: 0000-0001-6511-9385
- first_name: Markus
full_name: Gross, Markus
last_name: Gross
citation:
ama: 'Bermano A, Beeler T, Kozlov Y, Bradley D, Bickel B, Gross M. Detailed spatio-temporal
reconstruction of eyelids. In: Vol 34. ACM; 2015. doi:10.1145/2766924'
apa: 'Bermano, A., Beeler, T., Kozlov, Y., Bradley, D., Bickel, B., & Gross,
M. (2015). Detailed spatio-temporal reconstruction of eyelids (Vol. 34). Presented
at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques,
Los Angeles, CA, United States: ACM. https://doi.org/10.1145/2766924'
chicago: Bermano, Amit, Thabo Beeler, Yeara Kozlov, Derek Bradley, Bernd Bickel,
and Markus Gross. “Detailed Spatio-Temporal Reconstruction of Eyelids,” Vol. 34.
ACM, 2015. https://doi.org/10.1145/2766924.
ieee: 'A. Bermano, T. Beeler, Y. Kozlov, D. Bradley, B. Bickel, and M. Gross, “Detailed
spatio-temporal reconstruction of eyelids,” presented at the SIGGRAPH: Special
Interest Group on Computer Graphics and Interactive Techniques, Los Angeles, CA,
United States, 2015, vol. 34, no. 4.'
ista: 'Bermano A, Beeler T, Kozlov Y, Bradley D, Bickel B, Gross M. 2015. Detailed
spatio-temporal reconstruction of eyelids. SIGGRAPH: Special Interest Group on
Computer Graphics and Interactive Techniques vol. 34, 44.'
mla: Bermano, Amit, et al. Detailed Spatio-Temporal Reconstruction of Eyelids.
Vol. 34, no. 4, 44, ACM, 2015, doi:10.1145/2766924.
short: A. Bermano, T. Beeler, Y. Kozlov, D. Bradley, B. Bickel, M. Gross, in:, ACM,
2015.
conference:
end_date: 2015-08-13
location: Los Angeles, CA, United States
name: 'SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques'
start_date: 2015-08-09
date_created: 2018-12-11T11:53:06Z
date_published: 2015-07-27T00:00:00Z
date_updated: 2021-01-12T06:52:05Z
day: '27'
department:
- _id: BeBi
doi: 10.1145/2766924
intvolume: ' 34'
issue: '4'
language:
- iso: eng
month: '07'
oa_version: None
publication_status: published
publisher: ACM
publist_id: '5535'
quality_controlled: '1'
scopus_import: 1
status: public
title: Detailed spatio-temporal reconstruction of eyelids
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 34
year: '2015'
...
---
_id: '1626'
abstract:
- lang: eng
text: This paper introduces "OmniAD," a novel data-driven pipeline to
model and acquire the aerodynamics of three-dimensional rigid objects. Traditionally,
aerodynamics are examined through elaborate wind tunnel experiments or expensive
fluid dynamics computations, and are only measured for a small number of discrete
wind directions. OmniAD allows the evaluation of aerodynamic forces, such as drag
and lift, for any incoming wind direction using a novel representation based on
spherical harmonics. Our datadriven technique acquires the aerodynamic properties
of an object simply by capturing its falling motion using a single camera. Once
model parameters are estimated, OmniAD enables realistic realtime simulation of
rigid bodies, such as the tumbling and gliding of leaves, without simulating the
surrounding air. In addition, we propose an intuitive user interface based on
OmniAD to interactively design three-dimensional kites that actually fly. Various
nontraditional kites were designed to demonstrate the physical validity of our
model.
alternative_title:
- ACM Transactions on Graphics
article_number: '113'
author:
- first_name: Tobias
full_name: Martin, Tobias
last_name: Martin
- first_name: Nobuyuki
full_name: Umetani, Nobuyuki
last_name: Umetani
- first_name: Bernd
full_name: Bickel, Bernd
id: 49876194-F248-11E8-B48F-1D18A9856A87
last_name: Bickel
orcid: 0000-0001-6511-9385
citation:
ama: 'Martin T, Umetani N, Bickel B. OmniAD: Data-driven omni-directional aerodynamics.
In: Vol 34. ACM; 2015. doi:10.1145/2766919'
apa: 'Martin, T., Umetani, N., & Bickel, B. (2015). OmniAD: Data-driven omni-directional
aerodynamics (Vol. 34). Presented at the SIGGRAPH: Special Interest Group on Computer
Graphics and Interactive Techniques, Los Angeles, CA, United States: ACM. https://doi.org/10.1145/2766919'
chicago: 'Martin, Tobias, Nobuyuki Umetani, and Bernd Bickel. “OmniAD: Data-Driven
Omni-Directional Aerodynamics,” Vol. 34. ACM, 2015. https://doi.org/10.1145/2766919.'
ieee: 'T. Martin, N. Umetani, and B. Bickel, “OmniAD: Data-driven omni-directional
aerodynamics,” presented at the SIGGRAPH: Special Interest Group on Computer Graphics
and Interactive Techniques, Los Angeles, CA, United States, 2015, vol. 34, no.
4.'
ista: 'Martin T, Umetani N, Bickel B. 2015. OmniAD: Data-driven omni-directional
aerodynamics. SIGGRAPH: Special Interest Group on Computer Graphics and Interactive
Techniques, ACM Transactions on Graphics, vol. 34, 113.'
mla: 'Martin, Tobias, et al. OmniAD: Data-Driven Omni-Directional Aerodynamics.
Vol. 34, no. 4, 113, ACM, 2015, doi:10.1145/2766919.'
short: T. Martin, N. Umetani, B. Bickel, in:, ACM, 2015.
conference:
end_date: 2015-08-13
location: Los Angeles, CA, United States
name: 'SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques'
start_date: 2015-08-09
date_created: 2018-12-11T11:53:06Z
date_published: 2015-07-27T00:00:00Z
date_updated: 2021-01-12T06:52:05Z
day: '27'
department:
- _id: BeBi
doi: 10.1145/2766919
intvolume: ' 34'
issue: '4'
language:
- iso: eng
month: '07'
oa_version: None
publication_status: published
publisher: ACM
publist_id: '5532'
quality_controlled: '1'
scopus_import: 1
status: public
title: 'OmniAD: Data-driven omni-directional aerodynamics'
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 34
year: '2015'
...
---
_id: '1627'
abstract:
- lang: eng
text: We present a computational tool for fabrication-oriented design of flexible
rod meshes. Given a deformable surface and a set of deformed poses as input, our
method automatically computes a printable rod mesh that, once manufactured, closely
matches the input poses under the same boundary conditions. The core of our method
is formed by an optimization scheme that adjusts the cross-sectional profiles
of the rods and their rest centerline in order to best approximate the target
deformations. This approach allows us to locally control the bending and stretching
resistance of the surface with a single material, yielding high design flexibility
and low fabrication cost.
acknowledgement: This work was supported in part by grants from the Spanish Ministry
of Economy (TIN2012-35840), and the European Research Council (ERC Starting Grant
no. 280135 Animetrics).
article_number: '138'
author:
- first_name: Jesús
full_name: Pérez, Jesús
last_name: Pérez
- first_name: Bernhard
full_name: Thomaszewski, Bernhard
last_name: Thomaszewski
- first_name: Stelian
full_name: Coros, Stelian
last_name: Coros
- first_name: Bernd
full_name: Bickel, Bernd
id: 49876194-F248-11E8-B48F-1D18A9856A87
last_name: Bickel
orcid: 0000-0001-6511-9385
- first_name: José
full_name: Canabal, José
last_name: Canabal
- first_name: Robert
full_name: Sumner, Robert
last_name: Sumner
- first_name: Miguel
full_name: Otaduy, Miguel
last_name: Otaduy
citation:
ama: 'Pérez J, Thomaszewski B, Coros S, et al. Design and fabrication of flexible
rod meshes. In: Vol 34. ACM; 2015. doi:10.1145/2766998'
apa: 'Pérez, J., Thomaszewski, B., Coros, S., Bickel, B., Canabal, J., Sumner, R.,
& Otaduy, M. (2015). Design and fabrication of flexible rod meshes (Vol. 34).
Presented at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive
Techniques, Los Angeles, CA, United States: ACM. https://doi.org/10.1145/2766998'
chicago: Pérez, Jesús, Bernhard Thomaszewski, Stelian Coros, Bernd Bickel, José
Canabal, Robert Sumner, and Miguel Otaduy. “Design and Fabrication of Flexible
Rod Meshes,” Vol. 34. ACM, 2015. https://doi.org/10.1145/2766998.
ieee: 'J. Pérez et al., “Design and fabrication of flexible rod meshes,”
presented at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive
Techniques, Los Angeles, CA, United States, 2015, vol. 34, no. 4.'
ista: 'Pérez J, Thomaszewski B, Coros S, Bickel B, Canabal J, Sumner R, Otaduy M.
2015. Design and fabrication of flexible rod meshes. SIGGRAPH: Special Interest
Group on Computer Graphics and Interactive Techniques vol. 34, 138.'
mla: Pérez, Jesús, et al. Design and Fabrication of Flexible Rod Meshes.
Vol. 34, no. 4, 138, ACM, 2015, doi:10.1145/2766998.
short: J. Pérez, B. Thomaszewski, S. Coros, B. Bickel, J. Canabal, R. Sumner, M.
Otaduy, in:, ACM, 2015.
conference:
end_date: 2015-08-13
location: Los Angeles, CA, United States
name: 'SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques'
start_date: 2015-08-09
date_created: 2018-12-11T11:53:07Z
date_published: 2015-07-27T00:00:00Z
date_updated: 2021-01-12T06:52:06Z
day: '27'
department:
- _id: BeBi
doi: 10.1145/2766998
intvolume: ' 34'
issue: '4'
language:
- iso: eng
month: '07'
oa_version: None
publication_status: published
publisher: ACM
publist_id: '5530'
quality_controlled: '1'
scopus_import: 1
status: public
title: Design and fabrication of flexible rod meshes
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 34
year: '2015'
...
---
_id: '1628'
abstract:
- lang: eng
text: We propose a method for fabricating deformable objects with spatially varying
elasticity using 3D printing. Using a single, relatively stiff printer material,
our method designs an assembly of smallscale microstructures that have the effect
of a softer material at the object scale, with properties depending on the microstructure
used in each part of the object. We build on work in the area of metamaterials,
using numerical optimization to design tiled microstructures with desired properties,
but with the key difference that our method designs families of related structures
that can be interpolated to smoothly vary the material properties over a wide
range. To create an object with spatially varying elastic properties, we tile
the object's interior with microstructures drawn from these families, generating
a different microstructure for each cell using an efficient algorithm to select
compatible structures for neighboring cells. We show results computed for both
2D and 3D objects, validating several 2D and 3D printed structures using standard
material tests as well as demonstrating various example applications.
article_number: '136'
article_processing_charge: No
author:
- first_name: Christian
full_name: Schumacher, Christian
last_name: Schumacher
- first_name: Bernd
full_name: Bickel, Bernd
id: 49876194-F248-11E8-B48F-1D18A9856A87
last_name: Bickel
orcid: 0000-0001-6511-9385
- first_name: Jan
full_name: Rys, Jan
last_name: Rys
- first_name: Steve
full_name: Marschner, Steve
last_name: Marschner
- first_name: Chiara
full_name: Daraio, Chiara
last_name: Daraio
- first_name: Markus
full_name: Gross, Markus
last_name: Gross
citation:
ama: 'Schumacher C, Bickel B, Rys J, Marschner S, Daraio C, Gross M. Microstructures
to control elasticity in 3D printing. In: Vol 34. ACM; 2015. doi:10.1145/2766926'
apa: 'Schumacher, C., Bickel, B., Rys, J., Marschner, S., Daraio, C., & Gross,
M. (2015). Microstructures to control elasticity in 3D printing (Vol. 34). Presented
at the SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques,
Los Angeles, CA, USA: ACM. https://doi.org/10.1145/2766926'
chicago: Schumacher, Christian, Bernd Bickel, Jan Rys, Steve Marschner, Chiara Daraio,
and Markus Gross. “Microstructures to Control Elasticity in 3D Printing,” Vol.
34. ACM, 2015. https://doi.org/10.1145/2766926.
ieee: 'C. Schumacher, B. Bickel, J. Rys, S. Marschner, C. Daraio, and M. Gross,
“Microstructures to control elasticity in 3D printing,” presented at the SIGGRAPH:
Special Interest Group on Computer Graphics and Interactive Techniques, Los Angeles,
CA, USA, 2015, vol. 34, no. 4.'
ista: 'Schumacher C, Bickel B, Rys J, Marschner S, Daraio C, Gross M. 2015. Microstructures
to control elasticity in 3D printing. SIGGRAPH: Special Interest Group on Computer
Graphics and Interactive Techniques vol. 34, 136.'
mla: Schumacher, Christian, et al. Microstructures to Control Elasticity in 3D
Printing. Vol. 34, no. 4, 136, ACM, 2015, doi:10.1145/2766926.
short: C. Schumacher, B. Bickel, J. Rys, S. Marschner, C. Daraio, M. Gross, in:,
ACM, 2015.
conference:
end_date: 2015-08-13
location: Los Angeles, CA, USA
name: 'SIGGRAPH: Special Interest Group on Computer Graphics and Interactive Techniques'
start_date: 2015-08-09
date_created: 2018-12-11T11:53:07Z
date_published: 2015-08-01T00:00:00Z
date_updated: 2021-01-12T06:52:06Z
day: '01'
department:
- _id: BeBi
doi: 10.1145/2766926
intvolume: ' 34'
issue: '4'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1145/2766926
month: '08'
oa: 1
oa_version: Published Version
publication_status: published
publisher: ACM
publist_id: '5529'
quality_controlled: '1'
scopus_import: 1
status: public
title: Microstructures to control elasticity in 3D printing
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 34
year: '2015'
...
---
_id: '1734'
abstract:
- lang: eng
text: Facial appearance capture is now firmly established within academic research
and used extensively across various application domains, perhaps most prominently
in the entertainment industry through the design of virtual characters in video
games and films. While significant progress has occurred over the last two decades,
no single survey currently exists that discusses the similarities, differences,
and practical considerations of the available appearance capture techniques as
applied to human faces. A central difficulty of facial appearance capture is the
way light interacts with skin-which has a complex multi-layered structure-and
the interactions that occur below the skin surface can, by definition, only be
observed indirectly. In this report, we distinguish between two broad strategies
for dealing with this complexity. "Image-based methods" try to exhaustively
capture the exact face appearance under different lighting and viewing conditions,
and then render the face through weighted image combinations. "Parametric
methods" instead fit the captured reflectance data to some parametric appearance
model used during rendering, allowing for a more lightweight and flexible representation
but at the cost of potentially increased rendering complexity or inexact reproduction.
The goal of this report is to provide an overview that can guide practitioners
and researchers in assessing the tradeoffs between current approaches and identifying
directions for future advances in facial appearance capture.
author:
- first_name: Oliver
full_name: Klehm, Oliver
last_name: Klehm
- first_name: Fabrice
full_name: Rousselle, Fabrice
last_name: Rousselle
- first_name: Marios
full_name: Papas, Marios
last_name: Papas
- first_name: Derek
full_name: Bradley, Derek
last_name: Bradley
- first_name: Christophe
full_name: Hery, Christophe
last_name: Hery
- first_name: Bernd
full_name: Bickel, Bernd
id: 49876194-F248-11E8-B48F-1D18A9856A87
last_name: Bickel
orcid: 0000-0001-6511-9385
- first_name: Wojciech
full_name: Jarosz, Wojciech
last_name: Jarosz
- first_name: Thabo
full_name: Beeler, Thabo
last_name: Beeler
citation:
ama: Klehm O, Rousselle F, Papas M, et al. Recent advances in facial appearance
capture. Computer Graphics Forum. 2015;34(2):709-733. doi:10.1111/cgf.12594
apa: Klehm, O., Rousselle, F., Papas, M., Bradley, D., Hery, C., Bickel, B., … Beeler,
T. (2015). Recent advances in facial appearance capture. Computer Graphics
Forum. Wiley-Blackwell. https://doi.org/10.1111/cgf.12594
chicago: Klehm, Oliver, Fabrice Rousselle, Marios Papas, Derek Bradley, Christophe
Hery, Bernd Bickel, Wojciech Jarosz, and Thabo Beeler. “Recent Advances in Facial
Appearance Capture.” Computer Graphics Forum. Wiley-Blackwell, 2015. https://doi.org/10.1111/cgf.12594.
ieee: O. Klehm et al., “Recent advances in facial appearance capture,” Computer
Graphics Forum, vol. 34, no. 2. Wiley-Blackwell, pp. 709–733, 2015.
ista: Klehm O, Rousselle F, Papas M, Bradley D, Hery C, Bickel B, Jarosz W, Beeler
T. 2015. Recent advances in facial appearance capture. Computer Graphics Forum.
34(2), 709–733.
mla: Klehm, Oliver, et al. “Recent Advances in Facial Appearance Capture.” Computer
Graphics Forum, vol. 34, no. 2, Wiley-Blackwell, 2015, pp. 709–33, doi:10.1111/cgf.12594.
short: O. Klehm, F. Rousselle, M. Papas, D. Bradley, C. Hery, B. Bickel, W. Jarosz,
T. Beeler, Computer Graphics Forum 34 (2015) 709–733.
date_created: 2018-12-11T11:53:43Z
date_published: 2015-05-01T00:00:00Z
date_updated: 2021-01-12T06:52:52Z
day: '01'
department:
- _id: BeBi
doi: 10.1111/cgf.12594
intvolume: ' 34'
issue: '2'
language:
- iso: eng
main_file_link:
- url: https://graphics.ethz.ch/~mpapas/publications/fac_star.pdf
month: '05'
oa_version: None
page: 709 - 733
publication: Computer Graphics Forum
publication_status: published
publisher: Wiley-Blackwell
publist_id: '5391'
quality_controlled: '1'
scopus_import: 1
status: public
title: Recent advances in facial appearance capture
type: journal_article
user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
volume: 34
year: '2015'
...
---
_id: '1520'
abstract:
- lang: eng
text: Creating mechanical automata that can walk in stable and pleasing manners
is a challenging task that requires both skill and expertise. We propose to use
computational design to offset the technical difficulties of this process. A simple
drag-and-drop interface allows casual users to create personalized walking toys
from a library of pre-defined template mechanisms. Provided with this input, our
method leverages physical simulation and evolutionary optimization to refine the
mechanical designs such that the resulting toys are able to walk. The optimization
process is guided by an intuitive set of objectives that measure the quality of
the walking motions. We demonstrate our approach on a set of simulated mechanical
toys with different numbers of legs and various distinct gaits. Two fabricated
prototypes showcase the feasibility of our designs.
author:
- first_name: Gaurav
full_name: Bharaj, Gaurav
last_name: Bharaj
- first_name: Stelian
full_name: Coros, Stelian
last_name: Coros
- first_name: Bernhard
full_name: Thomaszewski, Bernhard
last_name: Thomaszewski
- first_name: James
full_name: Tompkin, James
last_name: Tompkin
- first_name: Bernd
full_name: Bickel, Bernd
id: 49876194-F248-11E8-B48F-1D18A9856A87
last_name: Bickel
orcid: 0000-0001-6511-9385
- first_name: Hanspeter
full_name: Pfister, Hanspeter
last_name: Pfister
citation:
ama: 'Bharaj G, Coros S, Thomaszewski B, Tompkin J, Bickel B, Pfister H. Computational
design of walking automata. In: ACM; 2015:93-100. doi:10.1145/2786784.2786803'
apa: 'Bharaj, G., Coros, S., Thomaszewski, B., Tompkin, J., Bickel, B., & Pfister,
H. (2015). Computational design of walking automata (pp. 93–100). Presented at
the SCA: ACM SIGGRAPH/Eurographics Symposium on Computer animation, Los Angeles,
CA, United States: ACM. https://doi.org/10.1145/2786784.2786803'
chicago: Bharaj, Gaurav, Stelian Coros, Bernhard Thomaszewski, James Tompkin, Bernd
Bickel, and Hanspeter Pfister. “Computational Design of Walking Automata,” 93–100.
ACM, 2015. https://doi.org/10.1145/2786784.2786803.
ieee: 'G. Bharaj, S. Coros, B. Thomaszewski, J. Tompkin, B. Bickel, and H. Pfister,
“Computational design of walking automata,” presented at the SCA: ACM SIGGRAPH/Eurographics
Symposium on Computer animation, Los Angeles, CA, United States, 2015, pp. 93–100.'
ista: 'Bharaj G, Coros S, Thomaszewski B, Tompkin J, Bickel B, Pfister H. 2015.
Computational design of walking automata. SCA: ACM SIGGRAPH/Eurographics Symposium
on Computer animation, 93–100.'
mla: Bharaj, Gaurav, et al. Computational Design of Walking Automata. ACM,
2015, pp. 93–100, doi:10.1145/2786784.2786803.
short: G. Bharaj, S. Coros, B. Thomaszewski, J. Tompkin, B. Bickel, H. Pfister,
in:, ACM, 2015, pp. 93–100.
conference:
end_date: 2015-08-09
location: Los Angeles, CA, United States
name: 'SCA: ACM SIGGRAPH/Eurographics Symposium on Computer animation'
start_date: 2015-08-07
date_created: 2018-12-11T11:52:30Z
date_published: 2015-08-01T00:00:00Z
date_updated: 2021-01-12T06:51:21Z
day: '01'
department:
- _id: BeBi
doi: 10.1145/2786784.2786803
language:
- iso: eng
month: '08'
oa_version: None
page: 93 - 100
publication_identifier:
isbn:
- 978-1-4503-3496-9
publication_status: published
publisher: ACM
publist_id: '5655'
quality_controlled: '1'
scopus_import: 1
status: public
title: Computational design of walking automata
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2015'
...