openvino/docs/ops/shape/Unsqueeze_1.md

Unsqueeze

Versioned name: Unsqueeze-1

Category: Shape manipulation

Short description: Unsqueeze adds dimensions of size 1 to the first input tensor. The second input value specifies a list of dimensions that will be inserted. Indices specify dimensions in the output tensor.

Attributes: Unsqueeze operation doesn't have attributes.

Inputs:

• 1: Multidimensional input tensor of type T. Required.

• 2: OD or 1D tensor of type T_SHAPE with dimensions indices to be set to 1. Values could be negative. Required.

Types

• T: supported type.

• T_SHAPE: supported integer type.

Example

Example 1:

<layer ... type="Unsqueeze">
    <input>
        <port id="0">
            <dim>2</dim>
            <dim>3</dim>
        </port>
    </input>
    <input>
        <port id="1">
            <dim>2</dim>  <!-- value is [0, 3] -->
        </port>
    </input>
    <output>
        <port id="2">
            <dim>1</dim>
            <dim>2</dim>
            <dim>3</dim>
            <dim>1</dim>
        </port>
    </output>
</layer>

Example 2: (unsqueeze 0D tensor (constant) to 1D tensor)

<layer ... type="Unsqueeze">
    <input>
        <port id="0">
        </port>
    </input>
    <input>
        <port id="1">
            <dim>1</dim>  <!-- value is [0] -->
        </port>
    </input>
    <output>
        <port id="2">
            <dim>1</dim>
        </port>
    </output>
</layer>