Sketch-based Interfaces: Sketching contours

Authors:
Johannes Zimmermann;Andrew Nealen;Marc Alexa
Affiliations:
Computer Sciences (Computer Graphics), TU Berlin, Einsteinufer 17, 10587 Berlin, Germany and Walt Disney Animation Studios, USA;Computer Sciences (Computer Graphics), TU Berlin, Einsteinufer 17, 10587 Berlin, Germany;Computer Sciences (Computer Graphics), TU Berlin, Einsteinufer 17, 10587 Berlin, Germany and Walt Disney Animation Studios, USA
Venue:
Computers and Graphics
Year:
2008

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Abstract

We introduce an over-sketching interface for feature-preserving surface mesh editing. The user sketches a stroke that is the suggested position of part of a silhouette of the displayed surface. The system then segments all image-space silhouettes of the projected surface, identifies among all silhouette segments the best matching part, derives vertices in the surface mesh corresponding to the silhouette part, selects a sub-region of the mesh to be modified, and feeds appropriately modified vertex positions together with the sub-mesh into a mesh deformation tool. The overall algorithm has been designed to enable interactive modification of the surface-yielding a surface editing system that comes close to the experience of sketching 3D models on paper.