Speckle noise poses a significant challenge in maintaining the quality of synthetic aperture radar (SAR) images, so SAR despeckling techniques have drawn increasing attention. Despite the tremendous advancements of deep learning in fixed-scale SAR image despeckling, these methods still struggle to deal with large-scale SAR images. To address this problem, this paper introduces a novel despeckling approach termed Region Denoising Diffusion Probabilistic Model (R-DDPM) based on generative models. R-DDPM enables versatile despeckling of SAR images across various scales, accomplished within a single training session. Moreover, The artifacts in the fused SAR images can be avoided effectively with the utilization of region-guided inverse sampling. Experiments of our proposed R-DDPM on Sentinel-1 data demonstrates superior performance to existing methods.
@article{arxiv.2401.03122,
title = {SAR Despeckling via Regional Denoising Diffusion Probabilistic Model},
author = {Xuran Hu and Ziqiang Xu and Zhihan Chen and Zhengpeng Feng and Mingzhe Zhu and LJubisa Stankovic},
journal= {arXiv preprint arXiv:2401.03122},
year = {2024}
}