Get ROIs from Voronoi Diagram

Image Analysis
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#1

Hi,

I am trying to get the ROIS from a Voronoi Diagram as drawn with this plugin: http://imagej.net/Delaunay_Voronoi

The plugin returns the Voronoi diagram as lines on top of my image - but I am not sure how to turn them into ROIs.

Thanks and cheers,
Kai

#2

Hey Kai,

The Delaunay Voronoi plugin has an option “make Delaunay ROI”:

710Ă—730 54 KB

Did you try this?

If you want to keep the overlay diagram that’s created in the interactive mode, you can also add it to the ROI manager using Image > Overlay > To ROI Manager.

#3

Hi Jan,
Thanks for the fast reply!

This option returns the Delaunay ROI based on the Delaunay diagram, which is a bit different from the Voronoi diagram. It does unfortunately not work on the Voronoi diagram.

However I just found an alternate solution involving the plugin “voronoi” in Process>Binary.
First use the multipoint tool to select a few points on a duplicate of the image, then:

run("Create Mask");
run("Voronoi");
setThreshold(0, 0);
run("Convert to Mask");
run("Analyze Particles...", "clear add in_situ");

cheers,
Kai

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