稠密网络

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DenseNet121 function

tf_keras.applications.DenseNet121(
    include_top=True,
    weights="imagenet",
    input_tensor=None,
    input_shape=None,
    pooling=None,
    classes=1000,
    classifier_activation="softmax",
)

Instantiates the Densenet121 architecture.

Reference

• Densely Connected Convolutional Networks (CVPR 2017)

Optionally loads weights pre-trained on ImageNet. Note that the data format convention used by the model is the one specified in your TF-Keras config at ~/.keras/keras.json.

Note: each TF-Keras Application expects a specific kind of input preprocessing. For DenseNet, call tf.keras.applications.densenet.preprocess_input on your inputs before passing them to the model.

Arguments

• include_top: whether to include the fully-connected layer at the top of the network.
• weights: one of None (random initialization), 'imagenet' (pre-training on ImageNet), or the path to the weights file to be loaded.
• input_tensor: optional TF-Keras tensor (i.e. output of layers.Input()) to use as image input for the model.
• input_shape: optional shape tuple, only to be specified if include_top is False (otherwise the input shape has to be (224, 224, 3) (with 'channels_last' data format) or (3, 224, 224) (with 'channels_first' data format). It should have exactly 3 inputs channels, and width and height should be no smaller than 32. E.g. (200, 200, 3) would be one valid value.
• pooling: Optional pooling mode for feature extraction when include_top is False.
  • None means that the output of the model will be the 4D tensor output of the last convolutional block.
  • avg means that global average pooling will be applied to the output of the last convolutional block, and thus the output of the model will be a 2D tensor.
  • max means that global max pooling will be applied.
• classes: optional number of classes to classify images into, only to be specified if include_top is True, and if no weights argument is specified.
• classifier_activation: A str or callable. The activation function to use on the "top" layer. Ignored unless include_top=True. Set classifier_activation=None to return the logits of the "top" layer. When loading pretrained weights, classifier_activation can only be None or "softmax".

Returns

A TF-Keras model instance.

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DenseNet169 function

tf_keras.applications.DenseNet169(
    include_top=True,
    weights="imagenet",
    input_tensor=None,
    input_shape=None,
    pooling=None,
    classes=1000,
    classifier_activation="softmax",
)

Instantiates the Densenet169 architecture.

Reference

• Densely Connected Convolutional Networks (CVPR 2017)

Optionally loads weights pre-trained on ImageNet. Note that the data format convention used by the model is the one specified in your TF-Keras config at ~/.keras/keras.json.

Note: each TF-Keras Application expects a specific kind of input preprocessing. For DenseNet, call tf.keras.applications.densenet.preprocess_input on your inputs before passing them to the model.

Arguments

• include_top: whether to include the fully-connected layer at the top of the network.
• weights: one of None (random initialization), 'imagenet' (pre-training on ImageNet), or the path to the weights file to be loaded.
• input_tensor: optional TF-Keras tensor (i.e. output of layers.Input()) to use as image input for the model.
• input_shape: optional shape tuple, only to be specified if include_top is False (otherwise the input shape has to be (224, 224, 3) (with 'channels_last' data format) or (3, 224, 224) (with 'channels_first' data format). It should have exactly 3 inputs channels, and width and height should be no smaller than 32. E.g. (200, 200, 3) would be one valid value.
• pooling: Optional pooling mode for feature extraction when include_top is False.
  • None means that the output of the model will be the 4D tensor output of the last convolutional block.
  • avg means that global average pooling will be applied to the output of the last convolutional block, and thus the output of the model will be a 2D tensor.
  • max means that global max pooling will be applied.
• classes: optional number of classes to classify images into, only to be specified if include_top is True, and if no weights argument is specified.
• classifier_activation: A str or callable. The activation function to use on the "top" layer. Ignored unless include_top=True. Set classifier_activation=None to return the logits of the "top" layer. When loading pretrained weights, classifier_activation can only be None or "softmax".

Returns

A TF-Keras model instance.

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DenseNet201 function

tf_keras.applications.DenseNet201(
    include_top=True,
    weights="imagenet",
    input_tensor=None,
    input_shape=None,
    pooling=None,
    classes=1000,
    classifier_activation="softmax",
)

Instantiates the Densenet201 architecture.

Reference

• Densely Connected Convolutional Networks (CVPR 2017)

Optionally loads weights pre-trained on ImageNet. Note that the data format convention used by the model is the one specified in your TF-Keras config at ~/.keras/keras.json.

Note: each TF-Keras Application expects a specific kind of input preprocessing. For DenseNet, call tf.keras.applications.densenet.preprocess_input on your inputs before passing them to the model.

Arguments

• include_top: whether to include the fully-connected layer at the top of the network.
• weights: one of None (random initialization), 'imagenet' (pre-training on ImageNet), or the path to the weights file to be loaded.
• input_tensor: optional TF-Keras tensor (i.e. output of layers.Input()) to use as image input for the model.
• input_shape: optional shape tuple, only to be specified if include_top is False (otherwise the input shape has to be (224, 224, 3) (with 'channels_last' data format) or (3, 224, 224) (with 'channels_first' data format). It should have exactly 3 inputs channels, and width and height should be no smaller than 32. E.g. (200, 200, 3) would be one valid value.
• pooling: Optional pooling mode for feature extraction when include_top is False.
  • None means that the output of the model will be the 4D tensor output of the last convolutional block.
  • avg means that global average pooling will be applied to the output of the last convolutional block, and thus the output of the model will be a 2D tensor.
  • max means that global max pooling will be applied.
• classes: optional number of classes to classify images into, only to be specified if include_top is True, and if no weights argument is specified.
• classifier_activation: A str or callable. The activation function to use on the "top" layer. Ignored unless include_top=True. Set classifier_activation=None to return the logits of the "top" layer. When loading pretrained weights, classifier_activation can only be None or "softmax".

Returns

A TF-Keras model instance.