9.75. ITK Valued Regional Maxima Image Filter

Transforms the image so that any pixel that is not a regional maxima is set to the minimum value for the pixel type. Pixels that are regional maxima retain their value.

The pixel neighborhood is controlled by the FullyConnected attribute. All adjacent pixels are included in the neighborhood when FullyConnected=True and the diagonally adjacent pixels are not included when FullyConnected=False. Different terminology is often used to describe neighborhoods – one common ex- ample is the “connectivity” notation, which refers to the number of pixels in the neighborhood. FullyCon- nected=False corresponds to a connectivty of 4 in 2D and 6 in 3D, while FullyConnected=True corresponds to a connectivity of 8 in 2D and 26 in 3D. FullyConnected=False is also commonly referred to as “face connected”.

Group (Subgroup)

ITKMathematicalMorphology (MathematicalMorphology)

Description

Regional maxima are flat zones surrounded by pixels of lower value. A completely flat image will be marked as a regional maxima by this filter.

This code was contributed in the Insight Journal paper: “Finding regional extrema - methods and performance” by Beare R., Lehmann G. https://www.insight-journal.org/browse/publication/65

Author

Richard Beare. Department of Medicine, Monash University, Melbourne, Australia.

Input Parameter(s)

Parameter Name

Parameter Type

Parameter Notes

Description

Fully Connected Components

Bool

Whether the connected components are defined strictly by face connectivity (False) or by face+edge+vertex connectivity (True). Default is FalseFor objects that are 1 pixel wide, use 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 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

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