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import torch | |
from torch import nn | |
import torchvision | |
def create_effnetb2(num_class: int, | |
seed: int = 42): | |
""" | |
A class to create an EfficientNetB2 feature extractor with DEFAULT weights | |
Args: | |
num_class (int): number of classes in the classifier head (int). | |
seed (int): random seed values (int, default = 42) | |
Returns: | |
model (torch.nn.Module): an instance of the EfficientNetB2 feature extractor with DEFAULT weights. | |
transforms (torchvision.transforms): an instant of the EfficientNetB2 transforms | |
""" | |
weights = torchvision.models.EfficientNet_B2_Weights.DEFAULT | |
transforms = weights.transforms() | |
model = torchvision.models.efficientnet_b2(weights = weights) | |
for param in model.features.parameters(): | |
param.requires_grad = False | |
torch.manual_seed(seed) | |
torch.cuda.manual_seed(seed) | |
model.classifier = nn.Sequential( | |
nn.Dropout(p = 0.3, inplace = True), | |
nn.Linear(in_features = 1408, out_features = num_class, bias = True) | |
) | |
return model, transforms | |