DR2: Diffusion-Based Robust Degradation Remover for Blind Face Restoration

Ours Figure 1. DR2 uses Denoising Diffusion Probabilistic Models to remove degradation. The generative process is conditioned on the low-quality input after being diffused into a noisy status. As a result, DR2 predicts coarse faces x0 regardless of the degradation type. On severely degraded images, our final restoration results achieve high quality with fewer artifacts than previous arts [14, 48] .