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3D printing spatially varying color and translucency

 
: Brunton, Alan; Arikan, Can Ates; Tanksale, Tejas Madan; Urban, Philipp

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ACM transactions on graphics 37 (2018), No.4, Art. 157, 13 pp.
ISSN: 0730-0301
ISSN: 1557-7368
European Commission EC
H2020; 665091; Scan4Reco
English
Journal Article
Fraunhofer IGD ()
3D printing; distance field; perception; Guiding Theme: Digitized Work; Guiding Theme: Visual Computing as a Service; Research Area: Computer graphics (CG)

Abstract
We present an efficient and scalable pipeline for fabricating full-colored objects with spatially-varying translucency from practical and accessible input data via multi-material 3D printing. Observing that the costs associated with BSSRDF measurement and processing are high, the range of 3D printable BSSRDFs are severely limited, and that the human visual system relies only on simple high-level cues to perceive translucency, we propose a method based on reproducing perceptual translucency cues. The input to our pipeline is an RGBA signal defined on the surface of an object, making our approach accessible and practical for designers. We propose a framework for extending standard color management and profiling to combined color and translucency management using a gamut correspondence strategy we call opaque relative processing. We present an efficient streaming method to compute voxel-level material arrangements, achieving both realistic reproduction of measured translucent materials and artistic effects involving multiple fully or partially transparent geometries.

: http://publica.fraunhofer.de/documents/N-525551.html