lsgan.py 文件源码

def build_generator(input_var=None):
    from lasagne.layers import InputLayer, ReshapeLayer, DenseLayer
    try:
        from lasagne.layers import TransposedConv2DLayer as Deconv2DLayer
    except ImportError:
        raise ImportError("Your Lasagne is too old. Try the bleeding-edge "
                          "version: http://lasagne.readthedocs.io/en/latest/"
                          "user/installation.html#bleeding-edge-version")
    try:
        from lasagne.layers.dnn import batch_norm_dnn as batch_norm
    except ImportError:
        from lasagne.layers import batch_norm
    from lasagne.nonlinearities import sigmoid
    # input: 100dim
    layer = InputLayer(shape=(None, 100), input_var=input_var)
    # fully-connected layer
    layer = batch_norm(DenseLayer(layer, 1024))
    # project and reshape
    layer = batch_norm(DenseLayer(layer, 128*7*7))
    layer = ReshapeLayer(layer, ([0], 128, 7, 7))
    # two fractional-stride convolutions
    layer = batch_norm(Deconv2DLayer(layer, 64, 5, stride=2, crop='same',
                                     output_size=14))
    layer = Deconv2DLayer(layer, 1, 5, stride=2, crop='same', output_size=28,
                          nonlinearity=sigmoid)
    print ("Generator output:", layer.output_shape)
    return layer