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Relief extraction and editing

Chen, Yin, Cheng, Zhi-Quan, Li, Jun, Martin, Ralph Robert and Wang, Yan-Zhen 2011. Relief extraction and editing. Computer-Aided Design 43 (12) , pp. 1674-1682. 10.1016/j.cad.2011.07.011

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Bas-reliefs are widely used in the world around us, for example, on coinage, for branding products, and for sculptural decoration. Reverse engineering of reliefs–extracting existing reliefs from input surfaces–makes it possible to apply them to new items; relief editing tools allow modification of reverse-engineered reliefs. This paper presents a novel approach to relief extraction based on differential coordinates, which offers advantages of speed and precise extraction. It also gives the first method in the literature specifically designed for relief editing. The base surface is estimated using normal smoothing and Poisson reconstruction, allowing a relief (which may lie on a smooth or textured input surface) to be automatically extracted by height thresholding. We also provide a range of relief editing tools, also using differential coordinates, permitting both global transformations (translation, rotation, and scaling) of the whole relief, as well as local modifications to the relief. Our relief editing algorithm, unlike generic mesh editing algorithms, is specifically designed to preserve the geometric detail of the relief over the base surface. The effectiveness of our methods is demonstrated on various examples of real industrial interest.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Computer Science & Informatics
Subjects: Q Science > QA Mathematics > QA76 Computer software
Uncontrolled Keywords: Bas-relief; Relief extraction; Relief editing; Differential coordinates; Laplacian smoothing; Poisson reconstruction
Additional Information: PDF uploaded in accordance with publisher's policy [accessed 14/04/2015] NOTICE: this is the author’s version of a work that was accepted for publication in Computer-Aided Design. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Computer-Aided Design, [VOL 43, ISSUE 12, 2011] DOI 10.1016/j.cad.2011.07.011
Publisher: Elsevier
ISSN: 0010-4485
Last Modified: 04 Jun 2017 04:36

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