-roi

Function

This function limits an effect to fit within a region-of-interest, speeding up processing considerably for the pixels outside of this box. It is a command line macro of the Constraint node.

Command Line

shake -roi img1 left bottom width height

Example

shake uboat -flip -roi uboat 30 30 200 200

This command only flips the 200x200 pixel box starting at pixel 30,30.