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Title: Bas-relief modeling from normal layers
Author(s): Pang, Raymond Wai Man 
Author(s): Wei, M.
Tian, Y.
Wang, C. C. L.
Pang, M. Y.
Wang, J.
Qin, J.
Issue Date: 2019
Publisher: IEEE
Journal: IEEE Transactions on Visualization and Computer Graphics 
Volume: 25
Issue: 4
Start page: 1651
End page: 1665
Bas-relief is characterized by its unique presentation of intrinsic shape properties and/or detailed appearance using materials raised up in different degrees above a background. However, many bas-relief modeling methods could not manipulate scene details well. We propose a simple and effective solution for two kinds of bas-relief modeling (i.e., structure-preserving and detail-preserving) which is different from the prior tone mapping alike methods. Our idea originates from an observation on typical 3D models, which are decomposed into a piecewise smooth base layer and a detail layer in normal field. Proper manipulation of the two layers contributes to both structure-preserving and detail-preserving bas-relief modeling. We solve the modeling problem in a discrete geometry processing setup that uses normal-based mesh processing as a theoretical foundation. Specifically, using the two-step mesh smoothing mechanism as a bridge, we transfer the bas-relief modeling problem into a discrete space, and solve it in a least-squares manner. Experiments and comparisons to other methods show that (i) geometry details are better preserved in the scenario with high compression ratios, and (ii) structures are clearly preserved without shape distortion and interference from details.
DOI: 10.1109/TVCG.2018.2818146
CIHE Affiliated Publication: Yes
Appears in Collections:CIS Publication

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