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Score-based Denoising Diffusion with Non-Isotropic Gaussian Noise Models

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arxiv 2210.12254 v2 pith:LFZPD5TK submitted 2022-10-21 cs.LG cs.CV

Score-based Denoising Diffusion with Non-Isotropic Gaussian Noise Models

classification cs.LG cs.CV
keywords gaussianmodelsdenoisingdiffusionnon-isotropicgenerativenoiseapproach
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Generative models based on denoising diffusion techniques have led to an unprecedented increase in the quality and diversity of imagery that is now possible to create with neural generative models. However, most contemporary state-of-the-art methods are derived from a standard isotropic Gaussian formulation. In this work we examine the situation where non-isotropic Gaussian distributions are used. We present the key mathematical derivations for creating denoising diffusion models using an underlying non-isotropic Gaussian noise model. We also provide initial experiments with the CIFAR-10 dataset to help verify empirically that this more general modeling approach can also yield high-quality samples.

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Cited by 3 Pith papers

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