This Unit is a Gradient Edge Detector. It looks for the 'rates of change' in the intensities of the image. These
will be high where there are 'edges' in the image. An alternative method of edge detection is the Binary Edge
Detector, a network for which can be seen on the
ShrinkWhite help
page.
Example
In this example some post processing has taken place as GradientEdge quite often generates a very dark image.