Voxel-based fabrication through material property mapping: A design method for bitmap printing

Doubrovski, Eugeni L.; Tsai, Erica Y.; Dikovsky, Daniel; Geraedts, Jo M. P.; Herr, Hugh M.; Oxman, Neri

doi:10.1016/j.cad.2014.05.010

Cited by 149 publications

(102 citation statements)

References 22 publications

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“…Both OpenFab and Spec2Fab can be seen as general frameworks which can accommodate various methods of specifying and/or optimizing for desired material properties, both visual and mechanical. Examples of these include custom BRDFs and other surface properties [Lan et al 2013;Rouiller et al 2013;Weyrich et al 2009], voxel micro-structure [Brunton et al 2015;Doubrovski et al 2015;Lou and Stucki 1998], continuous mixtures of inks [Papas et al 2013], or other, technology-speci c features [Pintus et al 2010;Reiner et al 2014].…”

Section: Fabrication Methodsologymentioning

confidence: 99%

Scattering-aware texture reproduction for 3D printing

Elek

Sumin

Zhang³

et al. 2017

ACM Trans. Graph.

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Fig. 1. A still life photograph of our optimized printouts. The thickness of all the pictured samples is 1 cm.Color texture reproduction in 3D printing commonly ignores volumetric light transport (cross-talk) between surface points on a 3D print. Such light di usion leads to signi cant blur of details and color bleeding, and is particularly severe for highly translucent resin-based print materials. Given their widely varying scattering properties, this cross-talk between surface points strongly depends on the internal structure of the volume surrounding each surface point. Existing scattering-aware methods use simpli ed models for light di usion, and often accept the visual blur as an immutable property of the print medium. In contrast, our work counteracts heterogeneous scattering to obtain the impression of a crisp albedo texture on top of the 3D print, by optimizing for a fully volumetric material distribution that preserves the target appearance. Our method employs an e cient numerical optimizer on top of a general Monte-Carlo simulation of heterogeneous scattering, supported by a practical calibration procedure to obtain scattering parameters from a given set of printer materials. Despite the inherent translucency of the medium, we reproduce detailed surface textures on 3D prints. We evaluate our system using a commercial, ve-tone 3D print process and compare against the printer's native color texturing mode, demonstrating *Oskar Elek and Denis Sumin share the rst authorship of this work. Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for pro t or commercial advantage and that copies bear this notice and the full citation on the rst page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior speci c permission and/or a fee. Request permissions from permissions@acm.org. © 2017 ACM. 0730-0301/2017/11-ART241 $15.00 DOI: 10.1145/3130800.3130890 that our method preserves high-frequency features well without having to compromise on color gamut.

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Section: Fabrication Methodsologymentioning

confidence: 99%

Scattering-aware texture reproduction for 3D printing

Elek

Sumin

Zhang³

et al. 2017

ACM Trans. Graph.

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“…14(c)) yielded a reduction in contact pressure of about 10-20% and a 16% faster self-selected walking speed. This group further refined the resolution of variable stiffness to a voxel-scale level through material property mapping [50]. A concept of AM for pressure sensing elements by locally varying transparency and index of refraction was also proposed.…”

Section: Traditional and Additive Manufacturing Of The Foot Orthosismentioning

confidence: 99%

Additive manufacturing of custom orthoses and prostheses—A review

Chen

Wensman

et al. 2016

Additive Manufacturing

207

145

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“…Multimaterial voxel printing of fluidic channels To 3D print materially heterogeneous channels, we implemented a voxel-based 3D printing technique, 17 which enabled the digital fabrication of material property gradients. Modern multimaterial 3D printers 18 utilize an ink jet-like printing approach to construct parts by depositing UV-curable droplets of photopolymer resin in a layer-by-layer manner.…”

Section: Fig 5 (A)mentioning

confidence: 99%

Grown, Printed, and Biologically Augmented: An Additively Manufactured Microfluidic Wearable, Functionally Templated for Synthetic Microbes

BaderChristoph

PatrickWilliam

KolbDominik

et al. 2016

3D Printing and Additive Manufacturing

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Despite significant advances in synthetic biology at industrial scales, digital fabrication challenges have, to date, precluded its implementation at the product scale. We present, Mushtari, a multimaterial 3D printed fluidic wearable designed to culture microbial communities. Thereby we introduce a computational design environment for additive manufacturing of geometrically complex and materially heterogeneous fluidic channels. We demonstrate how controlled variation of geometrical and optical properties at high spatial resolution can be achieved through a combination of computational growth modeling and multimaterial bitmap printing. Furthermore, we present the implementation, characterization, and evaluation of support methods for creating product-scale fluidics. Finally, we explore the cytotoxicity of 3D printed materials in culture studies with the model microorganisms, Escherichia coli and Bacillus subtilis. The results point toward design possibilities that lie at the intersection of computational design, additive manufacturing, and synthetic biology, with the ultimate goal of imparting biological functionality to 3D printed products.

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Voxel-based fabrication through material property mapping: A design method for bitmap printing

Cited by 149 publications

References 22 publications

Scattering-aware texture reproduction for 3D printing

Scattering-aware texture reproduction for 3D printing

Additive manufacturing of custom orthoses and prostheses—A review

Grown, Printed, and Biologically Augmented: An Additively Manufactured Microfluidic Wearable, Functionally Templated for Synthetic Microbes

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