In this paper we investigate the problem of inducing a distribution over three-dimensional structures given twodimensional views of multiple objects taken from unknown viewpoints. Our approach called "projective generative adversarial networks" (PrGANs) trains a deep generative model of 3D shapes whose projections match the distributions of the input 2D views. The addition of a projection module allows us to infer the underlying 3D shape distribution without using any 3D, viewpoint information, or annotation during the learning phase. We show that our approach produces 3D shapes of comparable quality to GANs trained on 3D data for a number of shape categories including chairs, airplanes, and cars. Experiments also show that the disentangled representation of 2D shapes into geometry and viewpoint leads to a good generative model of 2D shapes. The key advantage is that our model allows us to predict 3D, viewpoint, and generate novel views from an input image in a completely unsupervised manner.
REF propose projective generative adversarial (PrGAN) networks for obtaining 3D structures from multiple 2D views.
3D Shape Induction from 2D Views of Multiple Objects
2017 International Conference on 3D Vision (3DV)
2017 International Conference on 3D Vision (3DV)
Computer Science Mathematics