Create README.md

README.md

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+Original github repo is [here](https://github.com/greatlog/RealDAN)
+
+If this repo works for you, please cite our paper
+```bitex
+@article{luo2023end,
+  title={End-to-end Alternating Optimization for Real-World Blind Super Resolution},
+  author={Luo, Zhengxiong and Huang, Yan and Li, Shang and Wang, Liang and Tan, Tieniu},
+  journal={International Journal of Computer Vision (IJCV)},
+  year={2023}
+}
+```
+
+This repo is buid on the basis of [BasicSR](https://github.com/XPixelGroup/BasicSR)
+
+## Model Weights
+Download the checkpoints of RealDAN.
+
+Put the downloaded checkpoints into [checkpoints](./checkpoints)
+
+
+## Inference
+
+For inference on Real-World images
+
+```bash
+cd codes/config/RealDAN
+python3 inference.py \
+--opt options/test/dan_edsr_gan_real.yml \
+--input_dir=/dir/of/input/images \
+--output_dir=/dir/of/saved/outputs
+```
+
+For inference on blurry images
+
+```bash
+cd codes/config/KernelDAN
+python3 inference.py \
+--opt options/test/x4.yml \
+--input_dir=/dir/of/input/images \
+--output_dir=/dir/of/saved/outputs
+```
+
+## Evaluation
+
+For evaluation on DIV2K-Real, please download the dataset to your own path, and run
+
+```bash
+cd codes/config/RealDAN
+python3 test.py \
+--opt options/test/dan_edsr_gan_syn.yml
+```
+
+and
+
+```bash
+cd codes/config/RealDAN
+python3 test.py \
+--opt options/test/dan_edsr_syn.yml
+```
+
+
+For evaluation on DIV2KRK, please download the [dataset](http://www.wisdom.weizmann.ac.il/~vision/kernelgan/DIV2KRK_public.zip) to your own path, and run
+
+```bash
+cd codes/config/KernelDAN
+python3 test.py \
+--opt options/test/x2.yml 
+```
+
+and
+
+```bash
+cd codes/config/KernelDAN
+python3 test.py \
+--opt options/test/x4.yml 
+```