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tf.keras.layers.GlobalMaxPool2D

Global max pooling operation for 2D data.

Inherits From: Layer, Operation

tf.keras.layers.GlobalMaxPool2D(
    data_format=None, keepdims=False, **kwargs
)

Used in the notebooks

Used in the guide
Args
data_format string, either "channels_last" or "channels_first". The ordering of the dimensions in the inputs. "channels_last" corresponds to inputs with shape (batch, height, width, channels) while "channels_first" corresponds to inputs with shape (batch, features, height, weight). It defaults to the image_data_format value found in your Keras config file at ~/.keras/keras.json. If you never set it, then it will be "channels_last".
keepdims A boolean, whether to keep the temporal dimension or not. If keepdims is False (default), the rank of the tensor is reduced for spatial dimensions. If keepdims is True, the spatial dimension are retained with length 1. The behavior is the same as for tf.reduce_mean or np.mean.

Input shape:

  • If data_format='channels_last': 4D tensor with shape: (batch_size, height, width, channels)
  • If data_format='channels_first': 4D tensor with shape: (batch_size, channels, height, width)

Output shape:

  • If keepdims=False: 2D tensor with shape (batch_size, channels).
  • If keepdims=True:
    • If data_format="channels_last": 4D tensor with shape (batch_size, 1, 1, channels)
    • If data_format="channels_first": 4D tensor with shape (batch_size, channels, 1, 1)

Example:

x = np.random.rand(2, 4, 5, 3)
y = keras.layers.GlobalMaxPooling2D()(x)
y.shape
(2, 3)
Attributes
input Retrieves the input tensor(s) of a symbolic operation.

Only returns the tensor(s) corresponding to the first time the operation was called.

output Retrieves the output tensor(s) of a layer.

Only returns the tensor(s) corresponding to the first time the operation was called.

Methods

from_config

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@classmethod
from_config(
    config
)

Creates a layer from its config.

This method is the reverse of get_config, capable of instantiating the same layer from the config dictionary. It does not handle layer connectivity (handled by Network), nor weights (handled by set_weights).

Args
config A Python dictionary, typically the output of get_config.
Returns
A layer instance.

symbolic_call

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symbolic_call(
    *args, **kwargs
)

© 2022 The TensorFlow Authors. All rights reserved.
Licensed under the Creative Commons Attribution License 4.0.
Code samples licensed under the Apache 2.0 License.
https://www.tensorflow.org/api_docs/python/tf/keras/layers/GlobalMaxPool2D