From the perspective of diffusion model principle, why are the representations generated by DDPM from remote sensing images more robust and distinguishable than those obtained by UNet networks?

[ZhiyuLong0328]

Hello. Your article DDPM-CD has been very helpful to me, and I have a question I would like to discuss with you. The question is as follow.

From the perspective of diffusion model principle, why are the representations generated by DDPM from remote sensing images more robust and distinguishable than those obtained by UNet networks?

Looking forward to your reply, thank you. Sincerely yours.