st4topgm - convert an SBIG ST4 format file into a portable graymap
Reads an an image file in the native format used by the SBIG ST-4 astronomical CCD camera, and produces a portable graymap as output. Additional information on SBIG cameras and documentation of the file format is available at the Web site: http://www.sbig.com/
Copyright (C) 2003 by Justin Pryzby <email@example.com>.
Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation. This software is provided "as is" without express or implied warranty.