```{index} single: Filters; ITK Sigmoid Image Filter
```
# ITK Sigmoid Image Filter

Computes the sigmoid function pixel-wise.

## Group (Subgroup)

ITKImageIntensity (ImageIntensity)

## Description

A linear transformation is applied first on the argument of the sigmoid function. The resulting total transform is given by

![Images/ITKSigmoidImage_Equation.png](Images/ITKSigmoidImage_Equation.png)

Every output pixel is equal to f(x). Where x is the intensity of the homologous input pixel, and alpha and beta are user-provided constants.


### Input Parameter(s)

| Parameter Name | Parameter Type | Parameter Notes | Description |
|----------------|----------------|-----------------|-------------|
| Alpha | Scalar Value |Float64 | The Alpha value from the Sigmoid equation.  |
| Beta | Scalar Value |Float64 | The Beta value from teh sigmoid equation |
| Output Maximum | Scalar Value |Float64 | The maximum output value |
| Output Minimum | Scalar Value |Float64 | The minimum output value |

### Input Cell Data

| Parameter Name | Parameter Type | Parameter Notes | Description |
|----------------|----------------|-----------------|-------------|
| Image Geometry | Geometry Selection | Image | Select the Image Geometry Group from the DataStructure. |
| Input Cell Data | Array Selection | Allowed Types: int8, uint8, int16, uint16, int32, uint32, int64, uint64, float32, float64 | The image data that will be processed by this filter. |

### Output Cell Data

| Parameter Name | Parameter Type | Parameter Notes | Description |
|----------------|----------------|-----------------|-------------|
| Output Cell Data | DataObjectName |  | The result of the processing will be stored in this Data Array inside the same group as the input data. |

## Example Pipelines

## License & Copyright

Please see the description file distributed with this plugin.

## DREAM3D-NX Help

If you need help, need to file a bug report or want to request a new feature, please head over to the [DREAM3DNX-Issues](https://github.com/BlueQuartzSoftware/DREAM3DNX-Issues/discussions) GitHub site where the community of DREAM3D-NX users can help answer your questions.