Solid shape
Perceptual completion of occluded surfaces
Perceptual completion of occluded surfaces
IEEE Transactions on Pattern Analysis and Machine Intelligence
A signal processing approach to fair surface design
SIGGRAPH '95 Proceedings of the 22nd annual conference on Computer graphics and interactive techniques
SKETCH: an interface for sketching 3D scenes
SIGGRAPH '96 Proceedings of the 23rd annual conference on Computer graphics and interactive techniques
Topological Reconstruction of a Smooth Manifold-Solid from Its OccludingContour
International Journal of Computer Vision
Teddy: a sketching interface for 3D freeform design
Proceedings of the 26th annual conference on Computer graphics and interactive techniques
I3D '01 Proceedings of the 2001 symposium on Interactive 3D graphics
Lumo: illumination for cel animation
NPAR '02 Proceedings of the 2nd international symposium on Non-photorealistic animation and rendering
Filtering, Segmentation, and Depth
Filtering, Segmentation, and Depth
Perception of 3-D Surfaces from 2-D Contours
IEEE Transactions on Pattern Analysis and Machine Intelligence
Smooth meshes for sketch-based freeform modeling
I3D '03 Proceedings of the 2003 symposium on Interactive 3D graphics
Triangle: Engineering a 2D Quality Mesh Generator and Delaunay Triangulator
FCRC '96/WACG '96 Selected papers from the Workshop on Applied Computational Geormetry, Towards Geometric Engineering
Conceptual design and analysis by sketching
Artificial Intelligence for Engineering Design, Analysis and Manufacturing
Proceedings of the 2005 symposium on Interactive 3D graphics and games
A sketch-based interface for detail-preserving mesh editing
ACM SIGGRAPH 2005 Papers
Inferring 3D free-form shapes from contour drawings
SIGGRAPH '05 ACM SIGGRAPH 2005 Sketches
Cascading recognizers for ambiguous calligraphic interaction
SBM'04 Proceedings of the First Eurographics conference on Sketch-Based Interfaces and Modeling
IGEL: a virtual heat cutter for 3D shape modeling
Proceedings of the 8th International Conference on Virtual Reality Continuum and its Applications in Industry
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We introduce SmoothSketh---a system for inferring plausible 3D free-from shapes from visible-contour sketches. In our system, a user's sketch need not be a simple closed curve as in Igarashi's Teddy [1999], but may have cusps and T-junctions, i.e., endpoints of hidden parts of the contour. We follow a process suggested by Williams [1994] for inferring a smooth solid shape from its visible contours: completion of hidden contours, topological shape reconstruction, and smoothly embedding the shape via relaxation. Our main contribution is a practical method to go from a contour drawing to a fairly smooth surface with that drawing as its visible contour. In doing so, we make several technical contributions: • extending Williams' and Mumford's work [Mumford 1994] on figural completion of hidden contours containing T-junctions to contours containing cusps as well, • characterizing a class of visible-contour drawings for which inflation can be proved possible, • finding a topological embedding of the combinatorial surface that Williams creates from the figural completion, and • creating a fairly smooth solid shape by smoothing the topological embedding using a mass-spring system. We handle many kinds of drawings (including objects with holes), and the generated shapes are plausible interpretations of the sketches. The method can be incorporated into any sketch-based free-form modeling interface like Teddy.