Learning the Non-Differentiable Optimization for Blind ...
Learning the Non-Differentiable Optimization for Blind Super-ResolutionZheng Hui1Jie Li1Xiumei Wang1Xinbo Gao1,2, 1Visual Information Processing Lab, Xidian University, China2The Chongqing Key Laboratory of Image Cognition,Chongqing University of Posts and Telecommunications, convolutional neural network (CNN) basedblind super-resolution (SR) methods usually adopt an it-erative Optimization way to approximate the ground-truth(GT) step-by-step. This solution always involves more com-putational costs to bring about time-consuming present, most Blind SR algorithms are dedicated to ob-taining high-fidelity results; their loss function generallyemploys L1 loss.
timization for blind SR problems while maintaining fast training and testing speed (non-iterative). Following the standard approach, we model the LR image as degrada-tion from the HR image with blurring and downsampling. First, given a blur kernel and a LR image, we need to train a single network for multiple degradations SR as in [35, 10, 30].
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