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CodeFormer
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"""
This file is used for deploying hugging face demo:
https://huggingface.co/spaces/sczhou/CodeFormer
"""

import sys
sys.path.append('CodeFormer')
import os
import cv2
import torch
import torch.nn.functional as F
import gradio as gr

from torchvision.transforms.functional import normalize

from basicsr.utils import imwrite, img2tensor, tensor2img
from basicsr.utils.download_util import load_file_from_url
from facelib.utils.face_restoration_helper import FaceRestoreHelper
from basicsr.archs.rrdbnet_arch import RRDBNet
from basicsr.utils.realesrgan_utils import RealESRGANer

from basicsr.utils.registry import ARCH_REGISTRY


os.system("pip freeze")

pretrain_model_url = {
    'codeformer': 'https://github.com/sczhou/CodeFormer/releases/download/v0.1.0/codeformer.pth',
    'detection': 'https://github.com/sczhou/CodeFormer/releases/download/v0.1.0/detection_Resnet50_Final.pth',
    'parsing': 'https://github.com/sczhou/CodeFormer/releases/download/v0.1.0/parsing_parsenet.pth',
    'realesrgan': 'https://github.com/sczhou/CodeFormer/releases/download/v0.1.0/RealESRGAN_x2plus.pth'
}
# download weights
if not os.path.exists('CodeFormer/weights/CodeFormer/codeformer.pth'):
    load_file_from_url(url=pretrain_model_url['codeformer'], model_dir='CodeFormer/weights/CodeFormer', progress=True, file_name=None)
if not os.path.exists('CodeFormer/weights/facelib/detection_Resnet50_Final.pth'):
    load_file_from_url(url=pretrain_model_url['detection'], model_dir='CodeFormer/weights/facelib', progress=True, file_name=None)
if not os.path.exists('CodeFormer/weights/facelib/parsing_parsenet.pth'):
    load_file_from_url(url=pretrain_model_url['parsing'], model_dir='CodeFormer/weights/facelib', progress=True, file_name=None)
if not os.path.exists('CodeFormer/weights/realesrgan/RealESRGAN_x2plus.pth'):
    load_file_from_url(url=pretrain_model_url['realesrgan'], model_dir='CodeFormer/weights/realesrgan', progress=True, file_name=None)

# download images
torch.hub.download_url_to_file(
    'https://replicate.com/api/models/sczhou/codeformer/files/fa3fe3d1-76b0-4ca8-ac0d-0a925cb0ff54/06.png',
    '01.png')
torch.hub.download_url_to_file(
    'https://replicate.com/api/models/sczhou/codeformer/files/a1daba8e-af14-4b00-86a4-69cec9619b53/04.jpg',
    '02.jpg')
torch.hub.download_url_to_file(
    'https://replicate.com/api/models/sczhou/codeformer/files/542d64f9-1712-4de7-85f7-3863009a7c3d/03.jpg',
    '03.jpg')
torch.hub.download_url_to_file(
    'https://replicate.com/api/models/sczhou/codeformer/files/a11098b0-a18a-4c02-a19a-9a7045d68426/010.jpg',
    '04.jpg')
torch.hub.download_url_to_file(
    'https://replicate.com/api/models/sczhou/codeformer/files/7cf19c2c-e0cf-4712-9af8-cf5bdbb8d0ee/012.jpg',
    '05.jpg')

def imread(img_path):
    img = cv2.imread(img_path)
    img = cv2.cvtColor(img, cv2.COLOR_BGR2RGB)
    return img

# set enhancer with RealESRGAN
def set_realesrgan():
    half = True if torch.cuda.is_available() else False
    model = RRDBNet(
        num_in_ch=3,
        num_out_ch=3,
        num_feat=64,
        num_block=23,
        num_grow_ch=32,
        scale=2,
    )
    upsampler = RealESRGANer(
        scale=2,
        model_path="CodeFormer/weights/realesrgan/RealESRGAN_x2plus.pth",
        model=model,
        tile=400,
        tile_pad=40,
        pre_pad=0,
        half=half,
    )
    return upsampler

upsampler = set_realesrgan()
device = torch.device('cuda' if torch.cuda.is_available() else 'cpu')
codeformer_net = ARCH_REGISTRY.get("CodeFormer")(
    dim_embd=512,
    codebook_size=1024,
    n_head=8,
    n_layers=9,
    connect_list=["32", "64", "128", "256"],
).to(device)
ckpt_path = "CodeFormer/weights/CodeFormer/codeformer.pth"
checkpoint = torch.load(ckpt_path)["params_ema"]
codeformer_net.load_state_dict(checkpoint)
codeformer_net.eval()

os.makedirs('output', exist_ok=True)

def inference(image, background_enhance, face_upsample, upscale, codeformer_fidelity):
    """Run a single prediction on the model"""
    # take the default setting for the demo
    has_aligned = False
    only_center_face = False
    draw_box = False
    detection_model = "retinaface_resnet50"

    face_helper = FaceRestoreHelper(
        upscale,
        face_size=512,
        crop_ratio=(1, 1),
        det_model=detection_model,
        save_ext="png",
        use_parse=True,
        device=device,
    )
    bg_upsampler = upsampler if background_enhance else None
    face_upsampler = upsampler if face_upsample else None

    img = cv2.imread(str(image), cv2.IMREAD_COLOR)

    if has_aligned:
        # the input faces are already cropped and aligned
        img = cv2.resize(img, (512, 512), interpolation=cv2.INTER_LINEAR)
        face_helper.cropped_faces = [img]
    else:
        face_helper.read_image(img)
        # get face landmarks for each face
        num_det_faces = face_helper.get_face_landmarks_5(
          only_center_face=only_center_face, resize=640, eye_dist_threshold=5
        )
        print(f"\tdetect {num_det_faces} faces")
        # align and warp each face
        face_helper.align_warp_face()

    # face restoration for each cropped face
    for idx, cropped_face in enumerate(face_helper.cropped_faces):
        # prepare data
        cropped_face_t = img2tensor(
            cropped_face / 255.0, bgr2rgb=True, float32=True
        )
        normalize(cropped_face_t, (0.5, 0.5, 0.5), (0.5, 0.5, 0.5), inplace=True)
        cropped_face_t = cropped_face_t.unsqueeze(0).to(device)

        try:
            with torch.no_grad():
                output = codeformer_net(
                    cropped_face_t, w=codeformer_fidelity, adain=True
                )[0]
                restored_face = tensor2img(output, rgb2bgr=True, min_max=(-1, 1))
            del output
            torch.cuda.empty_cache()
        except Exception as error:
            print(f"\tFailed inference for CodeFormer: {error}")
            restored_face = tensor2img(
                cropped_face_t, rgb2bgr=True, min_max=(-1, 1)
            )

        restored_face = restored_face.astype("uint8")
        face_helper.add_restored_face(restored_face)

    # paste_back
    if not has_aligned:
        # upsample the background
        if bg_upsampler is not None:
            # Now only support RealESRGAN for upsampling background
            bg_img = bg_upsampler.enhance(img, outscale=upscale)[0]
        else:
            bg_img = None
        face_helper.get_inverse_affine(None)
        # paste each restored face to the input image
        if face_upsample and face_upsampler is not None:
            restored_img = face_helper.paste_faces_to_input_image(
                upsample_img=bg_img,
                draw_box=draw_box,
                face_upsampler=face_upsampler,
            )
        else:
            restored_img = face_helper.paste_faces_to_input_image(
                upsample_img=bg_img, draw_box=draw_box
            )

    # save restored img
    save_path = f'output/out.png'
    imwrite(restored_img, str(save_path))

    restored_img = cv2.cvtColor(restored_img, cv2.COLOR_BGR2RGB)
    return restored_img



title = "CodeFormer: Robust Face Restoration and Enhancement Network"
description = r"""<center><img src='https://user-images.githubusercontent.com/14334509/189166076-94bb2cac-4f4e-40fb-a69f-66709e3d98f5.png' alt='CodeFormer logo'></center>
<b>Official Gradio demo</b> for <a href='https://github.com/sczhou/CodeFormer' target='_blank'><b>Towards Robust Blind Face Restoration with Codebook Lookup Transformer</b></a>.<br>
🔥 CodeFormer is a robust face restoration algorithm for old photos or AI-generated faces.<br>
🤗 Try CodeFormer for improved stable-diffusion generation!<br>
"""
article = r"""
If CodeFormer is helpful, please help to ⭐ the <a href='https://github.com/sczhou/CodeFormer' target='_blank'>Github Repo</a>. Thanks! 
[![GitHub Stars](https://img.shields.io/github/stars/sczhou/CodeFormer?style=social)](https://github.com/sczhou/CodeFormer)

---

📝 **Citation**

If our work is useful for your research, please consider citing:
```bibtex
@article{zhou2022codeformer,
    author = {Zhou, Shangchen and Chan, Kelvin C.K. and Li, Chongyi and Loy, Chen Change},
    title = {Towards Robust Blind Face Restoration with Codebook Lookup TransFormer},
    journal = {arXiv preprint arXiv:2206.11253},
    year = {2022}
}
```

📧 **Contact**

If you have any questions, please feel free to reach me out at <b>shangchenzhou@gmail.com</b>.

![visitors](https://visitor-badge.glitch.me/badge?page_id=sczhou/CodeFormer)
"""

gr.Interface(
    inference, [
        gr.inputs.Image(type="filepath", label="Input"),
        gr.inputs.Checkbox(default=True, label="Background_Enhance"),
        gr.inputs.Checkbox(default=True, label="Face_Upsample"),
        gr.inputs.Number(default=2, label="Rescaling_Factor"),
        gr.Slider(0, 1, value=0.5, step=0.01, label='Codeformer_Fidelity: 0 for better quality, 1 for better identity')
    ], [
        gr.outputs.Image(type="numpy", label="Output"),
    ],
    title=title,
    description=description,
    article=article,       
    examples=[
        ['01.png', True, True, 2, 0.7],
        ['02.jpg', True, True, 2, 0.7],
        ['03.jpg', True, True, 2, 0.7],
        ['04.jpg', True, True, 2, 0.1],
        ['05.jpg', True, True, 2, 0.1]
      ]
    ).launch()