ExpandDims

public final class ExpandDims

Inserts a dimension of 1 into a tensor's shape.

Given a tensor `input`, this operation inserts a dimension of 1 at the dimension index `axis` of `input`'s shape. The dimension index `axis` starts at zero; if you specify a negative number for `axis` it is counted backward from the end.

This operation is useful if you want to add a batch dimension to a single element. For example, if you have a single image of shape `[height, width, channels]`, you can make it a batch of 1 image with `expand_dims(image, 0)`, which will make the shape `[1, height, width, channels]`.

Other examples:

# 't' is a tensor of shape [2]
 shape(expand_dims(t, 0)) ==> [1, 2]
 shape(expand_dims(t, 1)) ==> [2, 1]
 shape(expand_dims(t, -1)) ==> [2, 1]
 
 # 't2' is a tensor of shape [2, 3, 5]
 shape(expand_dims(t2, 0)) ==> [1, 2, 3, 5]
 shape(expand_dims(t2, 2)) ==> [2, 3, 1, 5]
 shape(expand_dims(t2, 3)) ==> [2, 3, 5, 1]
 

This operation requires that:

`-1-input.dims() <= dim <= input.dims()`

This operation is related to `squeeze()`, which removes dimensions of size 1.

Constants

String

OP_NAME

The name of this op, as known by TensorFlow core engine

Public Methods

Output<T>	asOutput() Returns the symbolic handle of the tensor.
static <T extends TType> ExpandDims<T>	create(Scope scope, Operand<T> input, Operand<? extends TNumber> axis) Factory method to create a class wrapping a new ExpandDims operation.
Output<T>	output() Contains the same data as `input`, but its shape has an additional dimension of size 1 added.

Inherited Methods

From class org.tensorflow.op.RawOp

final boolean	equals(Object obj)
final int	hashCode()
Operation	op() Return this unit of computation as a single Operation.
final String	toString()

From class java.lang.Object

boolean	equals(Object arg0)
final Class<?>	getClass()
int	hashCode()
final void	notify()
final void	notifyAll()
String	toString()
final void	wait(long arg0, int arg1)
final void	wait(long arg0)
final void	wait()

From interface org.tensorflow.op.Op

abstract ExecutionEnvironment	env() Return the execution environment this op was created in.
abstract Operation	op() Return this unit of computation as a single Operation.

From interface org.tensorflow.Operand

abstract Output<T>	asOutput() Returns the symbolic handle of the tensor.
abstract T	asTensor() Returns the tensor at this operand.
abstract Shape	shape() Returns the (possibly partially known) shape of the tensor referred to by the Output of this operand.
abstract Class<T>	type() Returns the tensor type of this operand

From interface org.tensorflow.ndarray.Shaped

abstract int	rank()
abstract Shape	shape()
abstract long	size() Computes and returns the total size of this container, in number of values.

Constants

public static final String OP_NAME

The name of this op, as known by TensorFlow core engine

Constant Value: "ExpandDims"

Public Methods

public Output<T> asOutput ()

Returns the symbolic handle of the tensor.

Inputs to TensorFlow operations are outputs of another TensorFlow operation. This method is used to obtain a symbolic handle that represents the computation of the input.

public static ExpandDims<T> create (Scope scope, Operand<T> input, Operand<? extends TNumber> axis)

Factory method to create a class wrapping a new ExpandDims operation.

Parameters

scope	current scope
axis	0-D (scalar). Specifies the dimension index at which to expand the shape of `input`. Must be in the range `[-rank(input) - 1, rank(input)]`.

Returns

• a new instance of ExpandDims

public Output<T> output ()

Contains the same data as `input`, but its shape has an additional dimension of size 1 added.