//load ImageJ
%classpath config resolver scijava.public https://maven.scijava.org/content/groups/public
%classpath add mvn net.imagej imagej 2.0.0-rc-67

//create ImageJ object
ij = new net.imagej.ImageJ()

ij.op().help("blackTopHat")

input_full = ij.scifio().datasetIO().open("http://imagej.net/images/blobs.gif")

//input_full has 3 channels. We only need one.
input = ij.op().run("hyperSliceView", input_full, 2, 0)

ij.notebook().display(input)

import net.imglib2.algorithm.neighborhood.HyperSphereShape

//create the shape that we are going to use in the Top-hat
shape = new HyperSphereShape(10)

output = ij.op().run("blackTopHat", null, input, [shape])

ij.notebook().display(output)

import net.imglib2.img.Img

list = new ArrayList<Img>()
 
list.add(input)
list.add(output)

stacked = ij.op().run("stackView", list)

ij.notebook().display(stacked)