PReLIB: PDE-Based Restoration of Lost Image Blocks

In this paper, restoration of damaged image blocks with large sizes is considered and a discrete Fourier transform (DFT)-based approach is developed for this purpose, which requires interventions of both source encoder and decoder. Use of lossy codecs causes a processing error leading to noisy images after recovery. A partial differential equation (PDE)-based image enhancement approach is proposed to reduce the visual effect of this processing error. Experimental results show that our method can restore large size lost blocks of images, which overcomes previously proposed approaches.