yuanzhi-zhu/DiffPIR

How about unknown complex degradation type?

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Hi, thanks for the great work first :)

There are 3 types of degradations mentioned in the paper, which have explicit expressions as suggested by Eq. 25, 27, 29. In real world, the degradation might be complex and unclear, I wonder how to deal with such degradation? could you please give some insights? thanks in advance!

Hi @green-gooes ,

Thank you for your interest, the existing several training-free diffusion-based IR methods such as DDRM, DPS, DDNM and ours all require known degradation operators.

For real-world IR tasks with only paired data, you can either estimate the degradation kernel or train an end-to-end model with synthetic (augmented) data.

Thanks for the reply! I will try the second solution.