```{index} single: Filters; ITK White Top Hat Image Filter
```
# ITK White Top Hat Image Filter

White top hat extracts local maxima that are larger than the structuring element.

## Group (Subgroup)

ITKMathematicalMorphology (MathematicalMorphology)

## Description

Top-hats are described in Chapter 4.5 of Pierre Soille's book "Morphological Image Analysis: Principles and Applications", Second Edition, Springer, 2003.

### Author

 Gaetan Lehmann. Biologie du Developpement et de la Reproduction, INRA de Jouy-en-Josas, France.

### Related Filters

![](Images/ITKWhiteTopHat.png)


### Input Parameter(s)

| Parameter Name | Parameter Type | Parameter Notes | Description |
|----------------|----------------|-----------------|-------------|
| Kernel Radius | Vector of UInt32 Values | Order=X,Y,Z | The radius of the kernel structuring element. |
| Kernel Type | Choices |  | Set the kernel or structuring element used for the morphology. |
| Safe Border | Bool |  | A safe border is added to input image to avoid borders effects and remove it once the closing is done |

### 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.