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

Produce a binary image where foreground is the regional maxima of the input image.

## Group (Subgroup)

ITKMathematicalMorphology (MathematicalMorphology)

## Description

Regional maxima are flat zones surrounded by pixels of lower value.

If the input image is constant, the entire image can be considered as a maxima or not. The desired behavior can be selected with the SetFlatIsMaxima() method.

## Author

This class was contributed to the Insight Journal by author Gaetan Lehmann. Biologie du Developpement et de la Reproduction, INRA de Jouy-en-Josas, France. The paper can be found at https://www.insight-journal.org/browse/publication/65

## See Also

- [ValuedRegionalMaximaImageFilter](https://itk.org/Doxygen/html/classitk_1_1ValuedRegionalMaximaImageFilter.html)

- [HConvexImageFilter](https://itk.org/Doxygen/html/classitk_1_1HConvexImageFilter.html)

- [RegionalMinimaImageFilter](https://itk.org/Doxygen/html/classitk_1_1RegionalMinimaImageFilter.html)


### Input Parameter(s)

| Parameter Name | Parameter Type | Parameter Notes | Description |
|----------------|----------------|-----------------|-------------|
| Background Value | Scalar Value |Float64 | Set/Get the value used as 'background' in the output image. Defaults to NumericTraits<PixelType>::NonpositiveMin() . |
| Foreground Value | Scalar Value |Float64 | Set/Get the value in the output image to consider as 'foreground'. Defaults to maximum value of PixelType. |
| Fully Connected | Bool |  | Set/Get whether the connected components are defined strictly by face connectivity or by face+edge+vertex connectivity. Default is FullyConnectedOff. For objects that are 1 pixel wide, use FullyConnectedOn. |
| Flat Is Maxima | Bool |  | Set/Get whether a flat image must be considered as a maxima or not. Defaults to true. |

### 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 Image Data Array | DataObjectName |  | The result of the processing will be stored in this Data Array. |

## Example Pipelines

## License & Copyright

Please see the description file distributed with this plugin.

## DREAM3D Mailing Lists

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.