| import torch | |
| import torchvision | |
| from torch import nn | |
| def create_effnetb2_model(num_classes:int=3, # default output classes = 3 (pizza, steak, sushi) | |
| seed:int=42): | |
| # 1, 2, 3 Create EffNetB2 pretrained weights, transforms and model | |
| weights = torchvision.models.EfficientNet_B2_Weights.DEFAULT | |
| transforms = weights.transforms() | |
| model = torchvision.models.efficientnet_b2(weights=weights) | |
| # 4. Freeze all layers in the base model | |
| for param in model.parameters(): | |
| param.requires_grad = False | |
| # 5. Change classifier head with random seed for reproducibility | |
| torch.manual_seed(seed) | |
| model.classifier = nn.Sequential( | |
| nn.Dropout(p=0.3, inplace=True), | |
| nn.Linear(in_features=1408, out_features=num_classes) | |
| ) | |
| return model, transforms | |