Create README.md

Author: xuanandsix

README.md

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+# GFPGAN-onnxruntime-demo
+This is the onnxruntime inference code for  GFP-GAN: Towards Real-World Blind Face Restoration with Generative Facial Prior (CVPR 2021). Official code: https://github.com/TencentARC/GFPGAN
+
+## convert torch to onnx.
+```
+wget https://github.com/TencentARC/GFPGAN/releases/download/v1.3.0/GFPGANv1.3.pth
+
+python torch2onnx.py  --src_model_path ./GFPGANv1.3.pth --dst_model_path ./GFPGANv1.3.onnx --img_size 512 
+```
+
+## run onnx demo.
+```
+python demo_onnx.py --model_path GFPGANv1.3.onnx --image_path ./cropped_faces/Adele_crop.png --save_path Adele_v2.jpg
+```
+
+| input | v1.2| v1.3 | v1.4|
+| :-: |:-:|:-:|:-:|
+|<img src="https://github.com/xuanandsix/GFPGAN-onnxruntime-demo/raw/main/cropped_faces/Adele_crop.png" height="60%" width="60%">|<img src="https://github.com/xuanandsix/GFPGAN-onnxruntime-demo/raw/main/imgs/Adele_v2.jpg" height="60%" width="60%">|<img src="https://github.com/xuanandsix/GFPGAN-onnxruntime-demo/raw/main/imgs/Adele_v3.jpg" height="60%" width="60%">|<img src="https://github.com/xuanandsix/GFPGAN-onnxruntime-demo/raw/main/imgs/Adele_v4.jpg" height="60%" width="60%">|
+|<img src="https://github.com/xuanandsix/GFPGAN-onnxruntime-demo/raw/main/cropped_faces/Justin_Timberlake_crop.png" height="60%" width="60%">|<img src="https://github.com/xuanandsix/GFPGAN-onnxruntime-demo/raw/main/imgs/Justin_Timberlake_v2.jpg" height="60%" width="60%">|<img src="https://github.com/xuanandsix/GFPGAN-onnxruntime-demo/raw/main/imgs/Justin_Timberlake_v3.jpg" height="60%" width="60%">|<img src="https://github.com/xuanandsix/GFPGAN-onnxruntime-demo/raw/main/imgs/Justin_Timberlake_v4.jpg" height="60%" width="60%">|