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Spotlight
ShapeFlow: Learnable Deformation Flows Among 3D Shapes
Chiyu Jiang · Jingwei Huang · Andrea Tagliasacchi · Leonidas Guibas

Wed Dec 09 07:50 PM -- 08:00 PM (PST) @ Orals & Spotlights: Vision Applications

We present ShapeFlow, a flow-based model for learning a deformation space for entire classes of 3D shapes with large intra-class variations. ShapeFlow allows learning a multi-template deformation space that is agnostic to shape topology, yet preserves fine geometric details. Different from a generative space where a latent vector is directly decoded into a shape, a deformation space decodes a vector into a continuous flow that can advect a source shape towards a target. Such a space naturally allows the disentanglement of geometric style (coming from the source) and structural pose (conforming to the target). We parametrize the deformation between geometries as a learned continuous flow field via a neural network and show that such deformations can be guaranteed to have desirable properties, such as bijectivity, freedom from self-intersections, or volume preservation. We illustrate the effectiveness of this learned deformation space for various downstream applications, including shape generation via deformation, geometric style transfer, unsupervised learning of a consistent parameterization for entire classes of shapes, and shape interpolation.

Author Information

Max Jiang (UC Berkeley)
Jingwei Huang (Stanford University)
Andrea Tagliasacchi (Google Research, Brain)
Leonidas Guibas (stanford.edu)

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