pytorch实现AlexNet
def __init__(self):
super(AlexNet, self).__init__()
# 卷积部分
self.conv = nn.Sequential(
nn.Conv2d(1, 96, 11, 4), # in_channels, out_channels, kernel, stride, padding
nn.ReLU(),
nn.MaxPool2d(3, 2), # kernel, stride 55->27,channel = 95
nn.Conv2d(96, 256, 5, 1, 2), # 输入（27*27*96）
nn.ReLU(),
nn.MaxPool2d(3, 2),
nn.Conv2d(256, 384, 3, 1, 1),
nn.ReLU(),
nn.Conv2d(384, 384, 3, 1, 1),
nn.ReLU(),
nn.Conv2d(384, 256, 3, 1, 1),
nn.ReLU(),
nn.MaxPool2d(3, 2)
)
# 全连接部分
self.fc = nn.Sequential(
nn.Linear(256*5*5,4096),
nn.ReLU(),
nn.Dropout(0.5),
nn.Linear(4096, 4096),
nn.ReLU(),
nn.Dropout(0.5),
nn.Linear(4096, 10)
)
def forward(self, x):
feature = self.conv(img)
output = self.fc(feature.view(x.shape[0],-1)) # batch_size
return output
net = AlexNet()
print(net)
AlexNet(
(conv): Sequential(
(0): Conv2d(1, 96, kernel_size=(11, 11), stride=(4, 4))
(1): ReLU()
(2): MaxPool2d(kernel_size=3, stride=2, padding=0, dilation=1, ceil_mode=False)
(3): Conv2d(96, 256, kernel_size=(5, 5), stride=(1, 1), padding=(2, 2))
(4): ReLU()
(5): MaxPool2d(kernel_size=3, stride=2, padding=0, dilation=1, ceil_mode=False)
(6): Conv2d(256, 384, kernel_size=(3, 3), stride=(1, 1), padding=(1, 1))
(7): ReLU()
(8): Conv2d(384, 384, kernel_size=(3, 3), stride=(1, 1), padding=(1, 1))
(9): ReLU()
(10): Conv2d(384, 256, kernel_size=(3, 3), stride=(1, 1), padding=(1, 1))
(11): ReLU()
(12): MaxPool2d(kernel_size=3, stride=2, padding=0, dilation=1, ceil_mode=False)
)
(fc): Sequential(
(0): Linear(in_features=6400, out_features=4096, bias=True)
(1): ReLU()
(2): Dropout(p=0.5, inplace=False)
(3): Linear(in_features=4096, out_features=4096, bias=True)
(4): ReLU()
(5): Dropout(p=0.5, inplace=False)
(6): Linear(in_features=4096, out_features=10, bias=True)
)
)
