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Turn a nD tensor into a 2D tensor with same 0th dimension.
Aliases:
tf.keras.backend.batch_flatten(x)
In other words, it flattens each data samples of a batch.
Arguments:
x: A tensor or variable.
Returns:
A tensor.
Examples:
Flattening a 3D tensor to 2D by collapsing the last dimension.
>>> from tensorflow.keras import backend as K
>>> x_batch = K.ones(shape=(2, 3, 4, 5))
>>> x_batch_flatten = K.batch_flatten(x_batch)
>>> K.int_shape(x_batch_flatten)
(2, 60)