Collection of various deep learning architectures in Pytorch. Enjoy!
- RNN from scratch Numpy
Collection of various deep learning architectures in Pytorch. Enjoy!
Hello, I know this is quite an old repo - but this has been one of the most helpful one for me in recent years, for implementation issues.
I am facing this odd problem with EfficientNet. I am trying to pretrain it from scratch using four classes from the CIFAR10
. But the validation accuracy remains extremely low for different combinations of hyperparameters. To be honest, I have tried couple more other popular implementations too - the result remains the same. I double checked my dataloading and preprocessing stages. They don't seem particularly problematic :
def load_dataset(dataset_name, dataset_path, splits, nworkers = 4):
if dataset_name.upper() == 'CIFAR10':
mean, std = [x / 255 for x in [125.3, 123.0, 113.9]], [x / 255 for x in [63.0, 62.1, 66.7]]
dataset = dset.CIFAR10
num_classes = 10
else: assert False, "Unknown dataset : {}".format(dataset_name)
cifar_classes = list(set(dataset(root='./data', train=True, download=True).targets))
train_transform = transforms.Compose([transforms.Resize(256),
transforms.CenterCrop(224),
transforms.AutoAugment(torchvision.transforms.AutoAugmentPolicy.CIFAR10),
transforms.ToTensor(), transforms.Normalize(mean, std)])
test_transform = transforms.Compose([transforms.Resize(256),
transforms.CenterCrop(224),
transforms.ToTensor(), transforms.Normalize(mean, std)])
cifar_train = dataset(dataset_path, train=True, transform=train_transform, download=True)
cifar_test = dataset(dataset_path, train=False, transform=test_transform, download=True)
train_loaders = []
test_loaders = []
for idx, split in enumerate(splits):
classes_set = [*range(split[0], split[1], 1)]
print("Classes Set: ", classes_set)
indices_train = [i for i, label in enumerate(cifar_train.targets) if label in classes_set]
indices_test = [i for i, label in enumerate(cifar_test.targets) if label in classes_set]
subset_train = Subset(cifar_train, indices_train)
subset_test = Subset(cifar_test, indices_test)
train_loader = DataLoader(subset_train, batch_size=batch_size, shuffle=True,)
test_loader = DataLoader(subset_test, batch_size=batch_size, shuffle=False)
train_loaders.append(train_loader)
test_loaders.append(test_loader)
return num_classes, train_loaders, test_loaders
These are the other hyperparams I am using:
criterion = nn.CrossEntropyLoss().to(device)
optimizer = torch.optim.SGD(pre_model.parameters(), lr=0.001, momentum=0.9) #TODO
exp_lr_scheduler = lr_scheduler.CosineAnnealingLR(optimizer, eta_min=0.00001, verbose=True, T_max = 30)
My training loop is also nothing out of the ordinary.
I am just very confused about what's going on with this training scheme.
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