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| import torch | |
| import torch.nn as nn | |
| import numpy as np | |
| from PIL import Image, ImageDraw | |
| from torchvision import transforms | |
| from transformers import ViTImageProcessor, ViTModel | |
| from facenet_pytorch import MTCNN | |
| import gradio as gr | |
| import time | |
| # Define the Vision Transformer (ViT) architecture | |
| class ViT(nn.Module): | |
| def __init__(self, base_model): | |
| super(ViT, self).__init__() | |
| self.base_model = base_model | |
| self.dropout = nn.Dropout(p=0.2) | |
| self.fc = nn.Linear(base_model.config.hidden_size, 512) | |
| self.dropout2 = nn.Dropout(p=0.2) | |
| self.l2_norm = nn.functional.normalize | |
| def forward(self, x): | |
| x = self.base_model(x).pooler_output | |
| x = self.dropout(x) | |
| x = self.fc(x) | |
| x = self.dropout2(x) | |
| x = self.l2_norm(x, p=2, dim=1) # Apply L2 normalization | |
| return x | |
| # Load the pre-trained ViT model and processor | |
| model_name = "google/vit-base-patch16-224" | |
| processor = ViTImageProcessor.from_pretrained(model_name) | |
| base_model = ViTModel.from_pretrained(model_name) | |
| model = ViT(base_model) | |
| model_path = r'best_vit11.pth' | |
| model.load_state_dict(torch.load(model_path)) | |
| model.eval().to('cuda' if torch.cuda.is_available() else 'cpu') | |
| # Initialize MTCNN for face detection | |
| mtcnn = MTCNN(keep_all=True, min_face_size=12, device='cuda' if torch.cuda.is_available() else 'cpu') | |
| def align_face(frame): | |
| # Convert the frame to a PIL image if it's a numpy array | |
| if isinstance(frame, np.ndarray): | |
| frame = Image.fromarray(frame) | |
| boxes, _ = mtcnn.detect(frame) | |
| if boxes is not None and len(boxes) > 0: | |
| faces = mtcnn(frame) | |
| if faces is not None and len(faces) > 0: | |
| face = faces[0] | |
| # Convert the face tensor to PIL Image | |
| face = transforms.ToPILImage()(face) | |
| return face, boxes[0] | |
| return None, None | |
| def draw_bounding_box(image, box): | |
| draw = ImageDraw.Draw(image) | |
| draw.rectangle(box.tolist(), outline="red", width=3) | |
| return image | |
| def euclidean_distance(embedding1, embedding2): | |
| return np.linalg.norm(embedding1 - embedding2) | |
| def process_images(image1, image2): | |
| start_time = time.time() | |
| frame1 = np.array(image1) | |
| frame2 = np.array(image2) | |
| face1, box1 = align_face(frame1) | |
| face2, box2 = align_face(frame2) | |
| if face1 is None or face2 is None: | |
| return None, "Face not detected in one or both images." | |
| # Use processor to preprocess the images | |
| face1 = processor(images=face1, return_tensors="pt").pixel_values.to('cuda' if torch.cuda.is_available() else 'cpu') | |
| face2 = processor(images=face2, return_tensors="pt").pixel_values.to('cuda' if torch.cuda.is_available() else 'cpu') | |
| with torch.no_grad(): | |
| embedding1 = model(face1).cpu().numpy() | |
| embedding2 = model(face2).cpu().numpy() | |
| # Flatten the embeddings if necessary (ensuring they are 1D) | |
| embedding1 = embedding1.flatten() | |
| embedding2 = embedding2.flatten() | |
| euclidean_dist = euclidean_distance(embedding1, embedding2) | |
| is_match = euclidean_dist < 0.3 | |
| # Calculate confidence | |
| confidence = max(0.0, 1.0 - euclidean_dist / 1.0) # Ensure confidence is between 0 and 1 | |
| print(f'confidence={confidence}') | |
| end_time = time.time() | |
| inference_time = end_time - start_time | |
| # Draw bounding boxes on the original images | |
| image1_with_box = draw_bounding_box(image1, box1) | |
| image2_with_box = draw_bounding_box(image2, box2) | |
| result = f"Euclidean Distance: {euclidean_dist:.2f}\n" | |
| result += f"Match: {is_match}\n" | |
| result += f"Inference time: {inference_time:.2f} seconds" | |
| return [image1_with_box, image2_with_box], result | |
| # Create the Gradio interface | |
| iface = gr.Interface( | |
| fn=process_images, | |
| inputs=[gr.Image(type="pil"), gr.Image(type="pil")], | |
| outputs=[gr.Gallery(), gr.Textbox()], | |
| title="Face Verification with Vision Transformer", | |
| description="Upload two images and the model will verify if the faces in both images are of the same person." | |
| ) | |
| # Launch the interface | |
| iface.launch(share=True, debug=True) |