Sigmoid

Versioned name: Sigmoid-1

Category: Activation function

Short description: Sigmoid element-wise activation function.

Detailed description: Reference

Attributes: Sigmoid operation has no attributes.

Mathematical Formulation

For each element from the input tensor calculates corresponding element in the output tensor with the following formula:

\[sigmoid( x ) = \frac{1}{1+e^{-x}}\]

Inputs:

  • 1: Input tensor x of any floating-point type. Required.

Outputs:

  • 1: Result of Sigmoid function applied to the input tensor x. Floating-point tensor with shape and type matching the input tensor.

Example

<layer ... type="Sigmoid">
    <input>
        <port id="0">
            <dim>256</dim>
            <dim>56</dim>
        </port>
    </input>
    <output>
        <port id="1">
            <dim>256</dim>
            <dim>56</dim>
        </port>
    </output>
</layer>