Module: Marker-Based Watershed / Watershed ()

Description:

Watershed is one of the configurations of the module Marker-Based Watershed. For other configurations, see the port Type.

For an introduction, see Fast Watershed principle.

This module performs a fast determination of the watershed lines from specified markers in a label image. It determines the crest lines separating the markers. The crest lines are output in a binary image.

See also: Add To Label, Reconstruction By Dilation, Reconstruction By Erosion, Fill Label Boundaries.

Connections:

Input Grayscale Image [required]
The image to be segmented using watershed. Supported types are: 8-bit and 16-bit grayscale image (Uniform Scalar Field), binary (Uniform Label Field with 2 labels) and label image (Uniform Label Field).

Input Label Image [required]
The image of markers that are used as seeds of the watershed process. Supported type is: label image (Uniform Label Field).

Ports:

Type

This port selects the configuration of this module. The available configurations are:

• Catchment Basins,
• Watershed.

Interpretation

This port specifies whether the input will be interpreted as a 3D volume or a stack of 2D images for processing.

• "3D": the module configuration is set to 3D. The image will be processed as a whole in 3D.
• "XY planes": the module configuration is set to 2D. The image will be processed slice per slice.

Neighborhood

In 3D configuration, this port refers to the type of connectivity considered for processing adjacent voxels:

• 6: voxels with a common face are considered connected
• 18: voxels with at least one common edge are considered connected
• 26: voxels with at least one common vertex are considered connected

Algorithm Mode

This port selects the type of algorithm used to separate the objects. It is one of the following:
repeatable: repeatable but slower
fast: faster but not repeatable because of asynchronous parallel computation.