3260 papers • 126 benchmarks • 313 datasets
Blind Super-Resolution is an image processing technique that aims to reconstruct high-resolution images from low-resolution counterparts without prior knowledge of the degradation process.
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This work extends the powerful ESRGAN to a practical restoration application (namely, Real-ESRGAN), which is trained with pure synthetic data and employs a U-Net discriminator with spectral normalization to increase discriminator capability and stabilize the training dynamics.
KernelGAN is introduced, an image-specific Internal-GAN, which trains solely on the LR test image at test time, and learns its internal distribution of patches, and leads to state-of-the-art results in Blind-SR when plugged into existing SR algorithms.
An iterative correction scheme -- IKC that achieves better results than direct kernel estimation in blind SR problem and an effective SR network architecture using spatial feature transform (SFT) layers to handle multiple blur kernels, named SFTMD.
A novel approach to leverage prior knowledge encapsulated in pre-trained text-to-image diffusion models for blind super-resolution by employing the time-aware encoder can achieve promising restoration results without altering the pre-trained synthesis model, thereby preserving the generative prior and minimizing training cost.
Numerical results on real remote sensing data from plant sciences and urban monitoring show the potential of the proposed method and suggests that it is robust with respect to the regularization parameters, mis-registration and the shape of the kernel.
This work presents an analysis, in the frequency domain, of degradation-kernel overfitting in super-resolution and introduces a conditional learning perspective that extends to both super- resolution and denoising and proposes a stochastic frequency masking of images used in training to regularize the networks and address the overfitting problem.
This paper reformulate the degradation model such that the deblurred kernel estimation can be transferred into the low resolution space and introduces a dynamic deep linear filter module that can adaptively generate deblurring kernel weights conditional on the input and yields more robust kernel estimation.
This paper proposes an unsupervised degradation representation learning scheme for blind SR without explicit degradation estimation, and introduces a Degradation-Aware SR (DASR) network with flexible adaption to various degradations based on the learned representations.
This work proposes Feature Matching SR (FeMaSR), which restores realistic HR images in a much more compact feature space by matching distorted LR image features to their distortion-free HR counterparts in the authors' pretrained HR priors, and decoding the matched features to obtain realisticHR images.
This work designs two convolutional neural modules, namely Restorer and Estimator, which can estimate the degradation and restore the SR image in a single model and can largely outperform state-of-the-art methods and produce more visually favorable results.
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