```{index} single: Filters; ITK Binary Opening By Reconstruction Image Filter
```
# ITK Binary Opening By Reconstruction Image Filter

binary morphological closing of an image.

## Group (Subgroup)

ITKBinaryMathematicalMorphology (BinaryMathematicalMorphology)

## Description

This filter removes small (i.e., smaller than the structuring element) objects in the image. It is defined as: Opening(f) = ReconstructionByDilatation(Erosion(f)).

The structuring element is assumed to be composed of binary values (zero or one). Only elements of the structuring element having values > 0 are candidates for affecting the center pixel.

### Author

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

### Related Filters

This implementation was taken from the Insight Journal paper: <https://www.insight-journal.org/browse/publication/176> * MorphologyImageFilter , OpeningByReconstructionImageFilter , BinaryClosingByReconstructionImageFilter

![](Images/ITKOpeningByReconstruction.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. |
| Foreground Value | Scalar Value |Float64 | Set the value in the image to consider as 'foreground'. Defaults to maximum value of PixelType. |
| Background Value | Scalar Value |Float64 | Set the value in eroded part of the image. Defaults to zero |
| 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. |

### 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 | 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.