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- W3112375205 abstract "We present a probabilistic model for point cloud generation, which is critical for various 3D vision tasks such as shape completion, upsampling, synthesis and data augmentation. Inspired by the diffusion process in non-equilibrium thermodynamics, we view points in point clouds as particles in a thermodynamic system in contact with a heat bath, which diffuse from the original distribution to a noise distribution. Point cloud generation thus amounts to learning the reverse diffusion process that transforms the noise distribution to the distribution of a desired shape. Specifically, we propose to model the reverse diffusion process for point clouds as a Markov chain conditioned on certain shape latent. We derive the variational bound in closed form for training and provide implementations of the model. Experimental results demonstrate that our model achieves the state-of-the-art performance in point cloud generation and auto-encoding." @default.
- W3112375205 created "2020-12-21" @default.
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- W3112375205 date "2021-05-04" @default.
- W3112375205 modified "2023-09-23" @default.
- W3112375205 title "A Point Cloud Generative Model Based on Nonequilibrium Thermodynamics" @default.
- W3112375205 hasPublicationYear "2021" @default.
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