The plugin allows to distort series of images so that they nicely fit together. The user must provide the horizontal view angle and possibly inclination angle of the camera, if the photos have not been taken in the horizontal plane. After that, the selected layer is recalculated from the plane onto a cylinder or onto a cone. If the parameters are set correctly, then perfect match of two adjacent images can be achieved, both in vertical and horizontal dimension.
The code homepage is on SourceForge http://sourceforge.net/projects/adjustforpanora/