Package qupath.imagej.processing

Class Watershed

java.lang.Object

qupath.imagej.processing.Watershed

public class Watershed
extends Object

Implementation of 2D watershed transform for ImageJ.

Constructor Summary

Constructors

Constructor	Description
Watershed()

Method Summary

Modifier and Type	Method	Description
static void	doWatershed(ImageProcessor ip, ImageProcessor ipLabels, boolean conn8)	Apply a watershed transform.
static void	doWatershed(ImageProcessor ip, ImageProcessor ipLabels, double minThreshold, boolean conn8)	Apply an intensity-constrained watershed transform, preventing regions from expanding to pixels below a specified minimum threshold
static void	watershedExpandLabels(ImageProcessor ipLabels, double maxDistance, boolean conn8)	Expand non-zero regions in a labeled image up to a maximum distance, using a watershed transform to prevent region merging.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

Watershed

public Watershed()

Method Details

watershedExpandLabels

public static void watershedExpandLabels(ImageProcessor ipLabels,
 double maxDistance,
 boolean conn8)

Expand non-zero regions in a labeled image up to a maximum distance, using a watershed transform to prevent region merging. The expansion is performed in-place.

Parameters:

ipLabels - labeled image, where values ≤ 0 represent the background

maxDistance - maximum expansion distance, in pixels

conn8 - if true, use 8-connectivity

doWatershed

public static void doWatershed(ImageProcessor ip,
 ImageProcessor ipLabels,
 boolean conn8)

Apply a watershed transform.

Parameters:

ip - intensity image

ipLabels - starting locations

conn8 - if true, use 8-connectivity rather than 4-connectivity

doWatershed

public static void doWatershed(ImageProcessor ip,
 ImageProcessor ipLabels,
 double minThreshold,
 boolean conn8)

Apply an intensity-constrained watershed transform, preventing regions from expanding to pixels below a specified minimum threshold

Parameters:

ip - intensity image

ipLabels - starting locations

minThreshold - minimum threshold

conn8 - if true, use 8-connectivity rather than 4-connectivity