Abstract
Recent years have witnessed the great success of deep learning-based single image super-resolution (SISR) methods. However, most of the existing SR methods assume that low-resolution (LR) images are purely bicubic downsampled from high-resolution (HR) images. Once the actual degradation is not bicubic, their outstanding performance is hard to maintain. Although several SR methods have super-resolved LR images with multiple blur kernels and noise levels, they still follow the bicubic downsampling assumption. To address this issue, we propose a novel degradation reconstruction loss (DRL) to capture the degradation-wise differences between HR images and SR images based on a degradation simulator. By involving the proposed degradation simulator and the loss, a perceptual-oriented SR framework for multi-downsampled images is formed. Extensive experimental results demonstrate that our method outperforms the state-of-the-art perceptual-oriented SR methods on both multi-downsampled datasets and bicubic downsampled datasets.
This work was supported in part by the National Natural Science Foundation of China (No. 62071500, No. 61701313).
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He, Z., Jin, Z., Xu, X., Luo, L. (2021). Degradation Reconstruction Loss: A Perceptual-Oriented Super-Resolution Framework for Multi-downsampling Degradations. In: Peng, Y., Hu, SM., Gabbouj, M., Zhou, K., Elad, M., Xu, K. (eds) Image and Graphics. ICIG 2021. Lecture Notes in Computer Science(), vol 12890. Springer, Cham. https://doi.org/10.1007/978-3-030-87361-5_36
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