I believe diffusion image models learn to model a reverse-noising function, rather than reverse-blurring.
Most of them do but it's not mandatory and deblurring can be used [1]
[1] Cold Diffusion: Inverting Arbitrary Image Transforms Without Noise, Bansal et al., NeurIPS 2023
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Most of them do but it's not mandatory and deblurring can be used [1]
[1] Cold Diffusion: Inverting Arbitrary Image Transforms Without Noise, Bansal et al., NeurIPS 2023