GeoBrush: Interactive Mesh Geometry Cloning

We propose a method for interactive cloning of 3D surface geometry using a paintbrush interface, similar to the continuous cloning brush popular in image editing. Existing interactive mesh composition tools focus on atomic copy‐and‐paste of preselected feature areas, and are either limited to copyin...

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Bibliographic Details
Published in:Computer graphics forum Vol. 30; no. 2; pp. 613 - 622
Main Authors: Takayama, Kenshi, Schmidt, Ryan, Singh, Karan, Igarashi, Takeo, Boubekeur, Tamy, Sorkine, Olga
Format: Journal Article
Language:English
Published: Oxford, UK Blackwell Publishing Ltd 01.04.2011
Subjects:
1.3.5 [Computer Graphics]: Computational Geometry and Object Modeling
and systems
Brushes
Cloning
Computer graphics
Computer science
Editing
Geometric algorithms
Geometric algorithms, languages, and systems
Geometry
Interactive
languages
Mathematical models
Parametrization
Reproduction
Studies
Three dimensional imaging
ISSN:0167-7055, 1467-8659
Online Access:Get full text
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Summary:We propose a method for interactive cloning of 3D surface geometry using a paintbrush interface, similar to the continuous cloning brush popular in image editing. Existing interactive mesh composition tools focus on atomic copy‐and‐paste of preselected feature areas, and are either limited to copying surface displacements, or require the solution of variational optimization problems, which is too expensive for an interactive brush interface. In contrast, our GeoBrush method supports real‐time continuous copying of arbitrary high‐resolution surface features between irregular meshes, including topological handles. We achieve this by first establishing a correspondence between the source and target geometries using a novel generalized discrete exponential map parameterization. Next we roughly align the source geometry with the target shape using Green Coordinates with automatically‐constructed cages. Finally, we compute an offset membrane to smoothly blend the pasted patch with C continuity before stitching it into the target. The offset membrane is a solution of a bi‐harmonic PDE, which is computed on the GPU in real time by exploiting the regular parametric domain. We demonstrate the effectiveness of GeoBrush with various editing scenarios, including detail enrichment and completion of scanned surfaces.
Bibliography:ArticleID:CGF1883
istex:669540CE10E198E8293F4C59AC48E5205A2C5812
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ISSN:0167-7055
1467-8659
DOI:10.1111/j.1467-8659.2011.01883.x