I am building a Custom Autoencoder to train on a dataset. My model is as follows
class AutoEncoder(nn.Module):
def __init__(self):
super(AutoEncoder,self).__init__()
self.encoder = nn.Sequential(
nn.Conv2d(in_channels = 3, out_channels = 32, kernel_size=3,stride=1),
nn.ReLU(inplace=True),
nn.Conv2d(in_channels = 32, out_channels = 64, kernel_size=3,stride=1),
nn.ReLU(inplace=True),
nn.Conv2d(in_channels = 64, out_channels = 128, kernel_size=3,stride=1),
nn.ReLU(inplace=True),
nn.Conv2d(in_channels=128,out_channels=256,kernel_size=5,stride=2),
nn.ReLU(inplace=True),
nn.Conv2d(in_channels=256,out_channels=512,kernel_size=5,stride=2),
nn.ReLU(inplace=True),
nn.Conv2d(in_channels=512,out_channels=1024,kernel_size=5,stride=2),
nn.ReLU(inplace=True)
)
self.decoder = nn.Sequential(
nn.ConvTranspose2d(in_channels=1024,out_channels=512,kernel_size=5,stride=2),
nn.ReLU(inplace=True),
nn.ConvTranspose2d(in_channels=512,out_channels=256,kernel_size=5,stride=2),
nn.ReLU(inplace=True),
nn.ConvTranspose2d(in_channels=256,out_channels=128,kernel_size=5,stride=2),
nn.ReLU(inplace=True),
nn.ConvTranspose2d(in_channels=128,out_channels=64,kernel_size=3,stride=1),
nn.ReLU(inplace=True),
nn.ConvTranspose2d(in_channels=64,out_channels=32,kernel_size=3,stride=1),
nn.ReLU(inplace=True),
nn.ConvTranspose2d(in_channels=32,out_channels=3,kernel_size=3,stride=1),
nn.ReLU(inplace=True)
)
def forward(self,x):
x = self.encoder(x)
print(x.shape)
x = self.decoder(x)
return x
def unit_test():
num_minibatch = 16
img = torch.randn(num_minibatch, 3, 512, 640).cuda(0)
model = AutoEncoder().cuda()
model = nn.DataParallel(model)
output = model(img)
print(output.shape)
if __name__ == '__main__':
unit_test()
As you can see, my input dimension is (3, 512, 640) but my output after passing it through the decoder is (3, 507, 635). Am I missing something while adding the Conv2Dtranspose layers ?
Any help would be appreciated. Thanks