====LABEL====
**By Vinzenz Unger and Anchi Cheng**


Label is a general purpose program to perform several useful manipulations. A full list of options can be found in the header of the source code.
The following are the options that are used throughout the protocols:
      1: select a region
      4: average adjacent pixel
      99: more options, mainly for display
      3: cut off over- and underflows