Left Toolbar > Filter Nodes > High Pass node
The High Pass node takes an image as input and filters out low frequency details, returning an image with only high frequencies.
image Image with a High Pass filter of size 3.0, 3.0.
On the left toolbar choose Filter Nodes > Displace. >
Drag the Displace icon into the Node Graph.
Connect the output of an image node into the image input in the High Pass node.
The Image to be filtered.
The filtered image.