将 Flatten 层添加到 Sequential 模型时出错

Question

我已经使用 Keras 创建并训练了一个自动编码器。训练完这个模型后，我只想得到编码器部分，所以我做了一些 pop().

后来我创建了 Sequential() 模型，基于我的自动编码器模型的剩余层：

model_seq = Sequential(layers=autoencoder.layers)

要添加 Flatten() 层，我做了：

l_out = Flatten()(model_seq.output)
model_seq.layers.append(l_out)

在我看来这应该足够了，所以我打电话给 model_seq.summary() 来检查是否一切正常。但不幸的是我遇到了这个错误：

    model_seq.summary()
    _________________________________________________________________
    Layer (type)                 Output Shape              Param #   
    =================================================================
    input_1 (InputLayer)         (None, 256, 256, 1)       0         
    _________________________________________________________________
    conv2d_1 (Conv2D)            (None, 256, 256, 32)      320       
    _________________________________________________________________
    max_pooling2d_1 (MaxPooling2 (None, 128, 128, 32)      0         
    _________________________________________________________________
    conv2d_2 (Conv2D)            (None, 128, 128, 64)      18496     
    _________________________________________________________________
    max_pooling2d_2 (MaxPooling2 (None, 64, 64, 64)        0         
    _________________________________________________________________
    conv2d_3 (Conv2D)            (None, 64, 64, 128)       73856     
    _________________________________________________________________
    Traceback (most recent call last):

      File "<ipython-input-49-cb26bbc86f4b>", line 1, in <module>
        model_seq.summary()

      File "C:\Users\helde\Miniconda3\lib\site-packages\keras\engine\topology.py", line 2740, in summary
        print_fn=print_fn)

      File "C:\Users\helde\Miniconda3\lib\site-packages\keras\utils\layer_utils.py", line 150, in print_summary
        print_layer_summary(layers[i])

      File "C:\Users\helde\Miniconda3\lib\site-packages\keras\utils\layer_utils.py", line 110, in print_layer_summary
        fields = [name + ' (' + cls_name + ')', output_shape, layer.count_params()]

    AttributeError: 'Tensor' object has no attribute 'count_params'

summary() 出现错误的部分正是 Flatten 层应该在的位置。

我是不是漏掉了什么？

Answer 1

在我看来，您似乎在混合使用 Sequential 和 Functional API。 model_seq.add(Flatten()) 呢？

将 Flatten 层添加到 Sequential 模型时出错

Error when adding Flatten layer to Sequential model

layer

flatten

sequential

autoencoder

keras