MultiFab

Sitthi‐Amorn, Pitchaya; Ramos, Javier E.; Wangy, Yuwang; Kwan, Joyce G; Lan, Justin T.; Wang, Wenshou; Matusik, Wojciech

doi:10.1145/2766962

Cited by 165 publications

(43 citation statements)

References 33 publications

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“…Notably, the printers' capabilities have improved dramatically from printing single-material objects to producing detailed structures with pervoxel material variation. Such capabilities are most prominent in printers based on the photo-polymer jetting process, which can currently produce full-color prints with a resolution in the order of 10 µm [Sitthi-Amorn et al 2015;Stratasys 2017].…”

Section: Introductionmentioning

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: Introductionmentioning

confidence: 99%

Scattering-aware texture reproduction for 3D printing

Elek

Sumin

Zhang³

et al. 2017

ACM Trans. Graph.

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“…3D printed models are often robust and can be made in-house relatively quickly and cheaply. These models can be printed in color, and dependent on the method a range of colors can be offered and prints can include multiple colors and transparent material (Begolo, Zhukov, Selck, Li, & Ismagilov, 2014;Sitthi-amorn et al, 2015), so that internal details can be seen (Blackburn, 2017). These accurate models can be interactive, such as a model of a flint axe (Galvin, 2017), allowing people to understand more about an object (in this case how it was constructed).…”

Section: Paleob I Ology and Cur Ati Onmentioning

confidence: 99%

3D Printing: Applications in evolution and ecology

Walker

Humphries

2019

Ecology and Evolution

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In the commercial and medical sectors, 3D printing is delivering on its promise to enable a revolution. However, in the fields of Ecology and Evolution we are only on the brink of embracing the advantages that 3D printing can offer. Here we discuss examples where the process has enabled researchers to develop new techniques, work with novel species, and to enhance the impact of outreach activities. Our aim is to showcase the potential that 3D printing offers in terms of improved experimental techniques, greater flexibility, reduced costs and promoting open science, while also discussing its limitations. By taking a general overview of studies using the technique from fields across the broad range of Ecology and Evolution, we show the flexibility of 3D printing technology and aim to inspire the next generation of discoveries.

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“…The above mentioned scanners have been used in conjunction with the Elevated Printing technology by Océ Technologies [54,67] to create 3D printed reproductions of paintings. Other systems currently capable of making high-quality full color 3D prints are the (adapted) Stratasys Connex3 or J750 [64], or the custom built Multifab printing system [63]. Limitations of these systems are the limited print area (max.…”

Section: D Color and Topography Fabricationmentioning

confidence: 99%

Gloss, Color, and Topography Scanning for Reproducing a Painting’s Appearance Using 3D Printing

Elkhuizen

Essers

Song

et al. 2019

J. Comput. Cult. Herit.

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High fidelity reproductions of paintings provide new opportunities to museums in preserving and providing access to cultural heritage. This paper presents an integrated system which is able to capture and fabricate color, topography and gloss of a painting, of which gloss capturing forms the most important contribution. A 3D imaging system, utilizing stereo imaging combined with fringe projection, is extended to capture spatially-varying gloss, based on the effect of specular reflectance polarization. The gloss is measured by sampling the specular reflection around Brewster's angle, where these reflections are effectively polarized, and can be separated from the unpolarized, diffuse reflectance. Off-center gloss measurements are calibrated relative to the center measurement. Off-specular gloss measurements, following from local variation of the surface normal, are masked based on the height map and corrected. Shadowed regions, caused by the 3D relief, are treated similarly. The area of a single capture is approximately 180 mm × 90 mm at a resolution of 25 µm × 25 µm. Aligned color, height, and gloss tiles are stitched together off-line, registering overlapping color regions. The resulting color, height and gloss maps are inputs for the poly-jet 3D printer. Two paintings were reproduced to verify the effectiveness and efficiency of the proposed system. One painting was scanned four times, consecutively rotated by 90°, to evaluate the influence of the scanning system geometric configuration on the gloss measurement. Experimental results show that the method is sufficiently fast for practical application, i.e. to scan a whole painting within eight hours, during closing hours of a museum. The results can well be used for the purpose of physical reproduction and other applications needing first-order estimates of the appearance (e.g. conservation diagnostics and condition reports). Our method to extend appearance scanning with gloss measurements is a valuable addition in the quest for realistic reproductions, in terms of its practical applicability -number of images needed for reconstruction and speed -and its perceptual added value, when added to color and topography reproduction.Developments in 3D scanning and 3D printing systems provide new opportunities to create high-fidelity physical reproductions of paintings. Facsimiles (one-to-one reproductions simulating the artifact's appearance), are already made of artifacts like manuscripts, for instance to support storytelling in exhibitions, when the original is too fragile to show. Up to recently, copies with such likeness did not exist for paintings [13]. Facsimiles of paintings, in addition to the original artwork, can play a role in museums' missions of preserving as well as providing access to cultural heritage. Possible applications of scanning and reproduction include: Multi-modal documentation of an artwork (e.g. adding to high-resolution photography, infrared, and X-ray imaging, as shown in the Bosch Research and Conservation Project [30,43]), showing an artwo...

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MultiFab

Cited by 165 publications

References 33 publications

Scattering-aware texture reproduction for 3D printing

Scattering-aware texture reproduction for 3D printing

3D Printing: Applications in evolution and ecology

Gloss, Color, and Topography Scanning for Reproducing a Painting’s Appearance Using 3D Printing

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