Food_Vision_Big / model.py
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import torch
import torchvision
from torch import nn
def create_effnetb2_model(num_classes : int = 3, # default output classes = 3
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 base layers in the model
for param in model.parameters():
param.requires_grad = False
# 5. Change classifier head with random seet 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, bias = True))
return model, transforms