This repository provides the official implementation for the paper

Learning Image-Adaptive Codebooks for Class-Agnostic Image Restoration
Kechun Liu, Yitong Jiang, Inchang Choi, Jinwei Gu
In ICCV 2023.

Abstract: Recent work of discrete generative priors, in the form of codebooks, has shown exciting performance for image reconstruction and restoration, since the discrete prior space spanned by the codebooks increases the robustness against diverse image degradations. Nevertheless, these methods require separate training of codebooks for different image categories, which limits their use to specific image categories only (e.g. face, architecture, etc.), and fail to handle arbitrary natural images. In this paper, we propose AdaCode for learning image-adaptive codebooks for classagnostic image restoration. Instead of learning a single codebook for all categories of images, we learn a set of basis codebooks. For a given input image, AdaCode learns a weight map with which we compute a weighted combination of these basis codebooks for adaptive image restoration. Intuitively, AdaCode is a more flexible and expressive discrete generative prior than previous work. Experimental results show that AdaCode achieves state-of-the-art performance on image reconstruction and restoration tasks, including image super-resolution and inpainting.

• Ubuntu >= 18.04
• CUDA >= 11.0
• Other required packages in requirements.txt

# git clone this repository
git clone https://github.com/kechunl/AdaCode.git
cd AdaCode 

# create new anaconda env
conda create -n AdaCode python=3.8
conda activate AdaCode 

# install python dependencies
pip install -r requirements.txt
python setup.py develop

# super resolution
python inference.py -i ./testset/sr -t sr -s 2 -o results_x2/
python inference.py -i ./testset/sr -t sr -s 4 -o results_x4/

# inpainting
python inference.py -i ./testset/inpaint -t inpaint -o results_inpaint/

Please prepare the training and testing data follow descriptions in the paper. In brief, you need to crop 512 x 512 high resolution patches, and generate the low resolution patches with degradation_bsrgan function provided by BSRGAN. You may find generate_dataset.py and generate_inpaint_datset.py useful in generating low resolution and masked patches.

Before training, you need to

• Download the pretrained stage 2 model: generator, discriminator
• Put the pretrained models in experiments/pretrained_models
• Specify their path in the corresponding option file.

python basicsr/train.py -opt options/stage3/train_Adacode_stage3.yaml

This project is based on FeMaSR.