ROI_fissa could not handle stacks that only had one z-layer (Fissa worked fine, bug was relating to export_to_matfile).
Added variable nLayers to store the number of layers in the stack. Added nLayers as an input for the two times ROI_fissa is called.
Authored by: kellgeor 2026-06-05
Parent: [r1957]
Child: [r1959]
