Python 如何将两个keras模型连接到一个模型中?
假设我有一个ResNet50模型,我希望将这个模型的输出层连接到VGG模型的输入层 这是ResNet模型和ResNet50的输出张量:Python 如何将两个keras模型连接到一个模型中?,python,tensorflow,keras,resnet,vgg-net,Python,Tensorflow,Keras,Resnet,Vgg Net,假设我有一个ResNet50模型,我希望将这个模型的输出层连接到VGG模型的输入层 这是ResNet模型和ResNet50的输出张量: img_shape = (164, 164, 3) resnet50_model = ResNet50(include_top=False, input_shape=img_shape, weights = None) print(resnet50_model.output.shape) 我得到输出: TensorShape([Dimension(None)
img_shape = (164, 164, 3)
resnet50_model = ResNet50(include_top=False, input_shape=img_shape, weights = None)
print(resnet50_model.output.shape)
我得到输出:
TensorShape([Dimension(None), Dimension(6), Dimension(6), Dimension(2048)])
现在我想要一个新层,在这里我将输出张量重塑为(64,64,18)
然后我有一个VGG16模型:
VGG_model = VGG_model = VGG16(include_top=False, weights=None)
我想把ResNet50的输出重塑成所需的张量,并作为VGG模型的输入输入。所以本质上我想连接两个模型。有人能帮我吗?
谢谢大家! 有多种方法可以做到这一点。这里有一种使用顺序模型API的方法
import tensorflow as tf
from tensorflow.keras.applications import ResNet50, VGG16
model = tf.keras.Sequential()
img_shape = (164, 164, 3)
model.add(ResNet50(include_top=False, input_shape=img_shape, weights = None))
model.add(tf.keras.layers.Reshape(target_shape=(64,64,18)))
model.add(tf.keras.layers.Conv2D(3,kernel_size=(3,3),name='Conv2d'))
VGG_model = VGG16(include_top=False, weights=None)
model.add(VGG_model)
model.compile(loss='categorical_crossentropy', optimizer='adam', metrics=['accuracy'])
model.summary()
模型摘要如下
Model: "sequential"
_________________________________________________________________
Layer (type) Output Shape Param #
=================================================================
resnet50 (Model) (None, 6, 6, 2048) 23587712
_________________________________________________________________
reshape (Reshape) (None, 64, 64, 18) 0
_________________________________________________________________
Conv2d (Conv2D) (None, 62, 62, 3) 489
_________________________________________________________________
vgg16 (Model) multiple 14714688
=================================================================
Total params: 38,302,889
Trainable params: 38,249,769
Non-trainable params: 53,120
_________________________________________________________________
完整的代码是 谢谢,如果我可以问一下,我们如何确定conv2d是否将输出3个通道?conv2d内核如何将张量转换为3个以上的通道?在上面的示例中,
conv2d
之前的层有18个通道(过滤器),因此我在conv2d
中定义了过滤器=3,因此形成了3个通道。您可以将过滤器
从3更改为任意数量,以增加通道数。