Modeling 3D animals from a side-view sketch

Even Entem (1, 2) , Loic Barthe (3, 4) , Marie-Paule Cani (1) , Frederic Cordier (5) , Michiel van de Panne (6)

1 IMAGINE - Intuitive Modeling and Animation for Interactive Graphics & Narrative Environments
2 IRIT - Institut de recherche en informatique de Toulouse
3 IRIT-STORM - Structural Models and Tools in Computer Graphics
4 UT3 - Université Toulouse III - Paul Sabatier
5 LMIA - Laboratoire de Mathématiques Informatique et Applications [UHA]
6 UBC - University of British Columbia

Using 2D contour sketches as input is an attractive solution for easing the creation of 3D models. This paper tackles the problem of creating 3D models of animals from a single, side-view sketch. We use the a priori assumptions of smoothness and structural symmetry of the animal about the sagittal plane to inform the 3D reconstruction. Our contributions include methods for identifying and inferring the contours of shape parts from the input sketch, a method for identifying the hierarchy of these structural parts including the detection of approximate symmetric pairs, and a hierarchical algorithm for positioning and blending these parts into a consistent 3D implicit-surface-based model. We validate this pipeline by showing that a number of plausible animal shapes can be automatically constructed from a single sketch.

Mots clés: Direct reconstruction; Implicit modelling; Sketch-based modelling; Organic shapes

Domaines: Synthèse d'image et réalité virtuelle [cs.GR]

Even Entem, Loic Barthe, Marie-Paule Cani, Frederic Cordier, Michiel van de Panne. Modeling 3D animals from a side-view sketch. Computers and Graphics, 2015, 46, pp.221-230. ⟨10.1016/j.cag.2014.09.037⟩. ⟨hal-01073059⟩