Create README.md
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README.md
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---
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library_name: pytorch
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license: mit
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base_model: torchvision/resnet18
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tags:
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- image-classification
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- scene-classification
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- transfer-learning
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- pytorch
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- computer-vision
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metrics:
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- accuracy
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model-index:
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- name: scene-classifier-resnet18
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results: []
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---
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# Scene Classifier - ResNet18
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This model is a fine-tuned version of ResNet-18 pretrained on ImageNet. It classifies images into 4 scene categories: cafe, gym, library, and outdoor.
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## Model description
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This model uses a dataset of video frames extracted from recordings of different indoor and outdoor locations. The ResNet-18 architecture was chosen for its balance of accuracy and computational efficiency, using transfer learning from ImageNet pretrained weights. Only the final fully-connected layer was retrained for the 4-class classification task.
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The model is part of a larger pipeline that generates contextual music based on scene classification combined with weather and temporal metadata.
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## Intended uses & limitations
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**Intended use:**
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- Scene classification for context-aware applications
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- Image-to-music generation pipelines
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- Indoor/outdoor scene detection
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- Educational demonstrations of transfer learning
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**Limitations:**
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- Limited to 4 specific scene categories (cafe, gym, library, outdoor)
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- Trained on relatively small dataset extracted from videos
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- May not generalize well to significantly different scene compositions
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- Performance may degrade on low-quality or heavily edited images
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- Indoor scenes may be confused if they share similar visual features
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## Training and evaluation data
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**Dataset:** Video frame extraction from 4 scene categories
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- Classes: cafe, gym, library, outdoor
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- Source: Personal video recordings of various locations
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- Extraction: Sampled every 10th frame from videos
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- Total frames: Approximately 2,400+ images
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- Format: JPEG, 224x224 resolution after preprocessing
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The dataset represents real-world indoor and outdoor environments with varying lighting conditions, angles, and compositions.
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## Training procedure
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### Data preprocessing
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Images were preprocessed with resize to 224x224 and converted to tensors.
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### Model architecture
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- Base model: ResNet-18 (ImageNet pretrained)
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- Modified layer: Final fully-connected layer changed from 1000 classes to 4 classes
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- Transfer learning: All layers except final FC layer retained pretrained weights
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### Training hyperparameters
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The following hyperparameters were used during training:
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- learning_rate: 1e-4
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- train_batch_size: 32
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- optimizer: Adam with default betas=(0.9, 0.999)
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- loss_function: CrossEntropyLoss
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- num_epochs: 3
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- device: CUDA (GPU accelerated)
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### Training results
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Training was conducted over 3 epochs with consistent loss reduction:
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| Epoch | Training Loss | Status |
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|:-----:|:-------------:|:------:|
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| 1 | 0.4523 | ✓ |
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| 2 | 0.2156 | ✓ |
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| 3 | 0.1089 | ✓ |
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Note: Formal validation metrics were not computed during training. Model was validated qualitatively on held-out images.
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## Usage
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### Loading the model
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import torch
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from torchvision import models, transforms
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from PIL import Image
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device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
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model = models.resnet18(weights=None)
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model.fc = torch.nn.Linear(model.fc.in_features, 4)
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model.load_state_dict(torch.load("pytorch_model.pth", map_location=device))
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model = model.to(device)
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model.eval()
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transform = transforms.Compose([
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transforms.Resize((224, 224)),
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transforms.ToTensor(),
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])
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class_labels = ["cafe", "gym", "library", "outdoor"]
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### Inference
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image = Image.open("your_image.jpg")
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if image.mode != 'RGB':
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image = image.convert('RGB')
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input_tensor = transform(image).unsqueeze(0).to(device)
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with torch.no_grad():
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outputs = model(input_tensor)
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predicted_idx = outputs.argmax(dim=1).item()
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predicted_class = class_labels[predicted_idx]
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confidence = torch.softmax(outputs, dim=1)[0][predicted_idx].item()
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print(f"Predicted: {predicted_class} (confidence: {confidence:.2%})")
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## Framework versions
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- PyTorch: 2.0+
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- Torchvision: 0.15+
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- Python: 3.8+
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- Pillow: 9.0+
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## Model Architecture Details
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ResNet-18 Structure:
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- Input: 3x224x224 RGB image
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- Convolutional layers with residual connections
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- Global average pooling
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- Final FC layer: 512 to 4 classes
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- Total parameters: approximately 11.7M (only approximately 2K trainable in final layer)
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## Additional Information
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This model was developed as part of a course project (24-679) exploring multimodal AI systems.
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It serves as the visual classification component in an image-to-music generation pipeline that combines scene recognition,
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metadata extraction, weather context, and music synthesis.
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