Create app.py

app.py

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+import gradio as gr
+import os.path
+import numpy as np
+from collections import OrderedDict
+import torch
+import cv2
+from PIL import Image, ImageOps
+from utils import utils_logger
+from utils import utils_image as util
+from models.network_fbcnn import FBCNN as net
+import requests
+
+
+def inference(input_img, is_gray, input_quality, enable_zoom, zoom, x_shift, y_shift, state):
+
+    if is_gray:
+        n_channels = 1 # set 1 for grayscale image, set 3 for color image
+        model_name = 'fbcnn_gray.pth'
+    else:
+        n_channels = 3 # set 1 for grayscale image, set 3 for color image
+        model_name = 'fbcnn_color.pth'
+    nc = [64,128,256,512]
+    nb = 4
+    
+
+    input_quality = 100 - input_quality
+
+    #model_pool = 'model_zoo'  # fixed
+    model_pool = '/content/FBCNN/model_zoo'  # fixed
+    model_path = os.path.join(model_pool, model_name)
+    if os.path.exists(model_path):
+        print(f'loading model from {model_path}')
+    else:
+        os.makedirs(os.path.dirname(model_path), exist_ok=True)
+        url = 'https://github.com/jiaxi-jiang/FBCNN/releases/download/v1.0/{}'.format(os.path.basename(model_path))
+        r = requests.get(url, allow_redirects=True)
+        open(model_path, 'wb').write(r.content)    
+
+    device = torch.device('cuda' if torch.cuda.is_available() else 'cpu')
+
+    # ----------------------------------------
+    # load model
+    # ----------------------------------------
+    if (not enable_zoom) or (state[1] is None):
+        model = net(in_nc=n_channels, out_nc=n_channels, nc=nc, nb=nb, act_mode='R')
+        model.load_state_dict(torch.load(model_path), strict=True)
+        model.eval()
+        for k, v in model.named_parameters():
+            v.requires_grad = False
+        model = model.to(device)
+
+        test_results = OrderedDict()
+        test_results['psnr'] = []
+        test_results['ssim'] = []
+        test_results['psnrb'] = []
+
+        # ------------------------------------
+        # (1) img_L
+        # ------------------------------------
+
+        if n_channels == 1:
+            open_cv_image = Image.fromarray(input_img)
+            open_cv_image = ImageOps.grayscale(open_cv_image)
+            open_cv_image = np.array(open_cv_image) # PIL to open cv image
+            img = np.expand_dims(open_cv_image, axis=2)  # HxWx1
+        elif n_channels == 3:
+            open_cv_image = np.array(input_img) # PIL to open cv image
+            if open_cv_image.ndim == 2:
+                open_cv_image = cv2.cvtColor(open_cv_image, cv2.COLOR_GRAY2RGB)  # GGG
+            else:
+                open_cv_image = cv2.cvtColor(open_cv_image, cv2.COLOR_BGR2RGB)  # RGB
+
+        img_L = util.uint2tensor4(open_cv_image)
+        img_L = img_L.to(device)
+
+        # ------------------------------------
+        # (2) img_E
+        # ------------------------------------
+          
+        img_E,QF = model(img_L)
+        QF = 1- QF
+        img_E = util.tensor2single(img_E)
+        img_E = util.single2uint(img_E)
+
+        qf_input = torch.tensor([[1-input_quality/100]]).cuda() if device == torch.device('cuda') else torch.tensor([[1-input_quality/100]])
+        img_E,QF = model(img_L, qf_input)  
+        QF = 1- QF
+        img_E = util.tensor2single(img_E)
+        img_E = util.single2uint(img_E)
+
+        if img_E.ndim == 3:
+            img_E = img_E[:, :, [2, 1, 0]]
+    if (state[1] is not None) and enable_zoom:
+      img_E = state[1]
+    out_img = Image.fromarray(img_E)
+    out_img_w, out_img_h = out_img.size # output image size
+    zoom = zoom/100
+    x_shift = x_shift/100
+    y_shift = y_shift/100
+    zoom_w, zoom_h = out_img_w*zoom, out_img_h*zoom
+    zoom_left, zoom_right = int((out_img_w - zoom_w)*x_shift), int(zoom_w + (out_img_w - zoom_w)*x_shift)
+    zoom_top, zoom_bottom = int((out_img_h - zoom_h)*y_shift), int(zoom_h + (out_img_h - zoom_h)*y_shift)
+    if (state[0] is None) or not enable_zoom:
+        in_img = Image.fromarray(input_img)
+        state[0] = input_img
+    else:
+        in_img = Image.fromarray(state[0])
+    in_img = in_img.crop((zoom_left, zoom_top, zoom_right, zoom_bottom))
+    in_img = in_img.resize((int(zoom_w/zoom), int(zoom_h/zoom)), Image.NEAREST)
+    out_img = out_img.crop((zoom_left, zoom_top, zoom_right, zoom_bottom))
+    out_img = out_img.resize((int(zoom_w/zoom), int(zoom_h/zoom)), Image.NEAREST)
+
+    return img_E, in_img, out_img, [state[0],img_E]
+    
+interface = gr.Interface(
+    fn = inference,
+    inputs = [gr.inputs.Image(),
+              gr.inputs.Checkbox(label="Grayscale (Check this if your image is grayscale)"),
+              gr.inputs.Slider(minimum=1, maximum=100, step=1, label="Intensity (Higher = more JPEG artifact removal)"),
+              gr.inputs.Checkbox(default=False, label="Edit Zoom preview \nThis is optional. "
+                                                      "Check this after the image result is loaded to edit zoom parameters\n"
+                                                      "without processing the input image."),
+              gr.inputs.Slider(minimum=10, maximum=100, step=1, default=50, label="Zoom Image \n"
+                                                                                  "Use this to see the image quality up close \n"
+                                                                                   "100 = original size"),
+              gr.inputs.Slider(minimum=0, maximum=100, step=1, label="Zoom preview horizontal shift \n"
+                                                                     "Increase to shift to the right"),
+              gr.inputs.Slider(minimum=0, maximum=100, step=1, label="Zoom preview vertical shift \n"
+                                                                     "Increase to shift downwards"),
+              gr.inputs.State(default=[None,None])
+              ],
+    outputs = [gr.outputs.Image(label="Result"),
+               gr.outputs.Image(label="Before:"),
+               gr.outputs.Image(label="After:"),
+               "state"]
+).launch(enable_queue=True,cache_examples=True)