const char isaac_slitpos_version[] = "$Revision: 1.7 $";
const char isaac_slitpos_date[]="$Date: 2001/09/21 09:22:41 $";
int  isaac_slitpos_main(void * d);

cmdline_spec isaac_slitpos_cmd[] = {
	{'o', "output", "Output file", 1, "outfile"},
	{'w', "max_width", "Maximal width of the slit", 1, "max_width"},
    {0, 0, 0, 0, 0}
};

const char isaac_slitpos_man[]=
"\n"
"NAME\n"
"       slitpos - slit position analysis\n"
"\n"
"SYNOPSIY\n"
"       slitpos [options] infiles\n"
"\n"
"DESCRIPTION\n"
"       slitpos finds the exact position of a slit. The  slit  has\n"
"       to be vertical: less than 10 degrees angle\n"
"       with the vertical.\n"
"\n"
"ALGORITHM\n"
"       slitpos expects an image of a slit or an ascii  file  with\n"
"       fits slit images names.\n"
"\n"
"       1.  Find  the  position  (in  x) of the slit (collapse the\n"
"       image, find the maximum).\n"
"\n"
"       2. Extract a thin image containing only the slit.\n"
"\n"
"       3. Find the edges of the slit. Binarize  the  thin  image,\n"
"       erode the result with a vertical kernel until there is one\n"
"       object left (supposed to be the slit) and  reconstruct  it\n"
"       with dilatations.\n"
"\n"
"       4.  Line by line, detect the edges (right and left) of the\n"
"       slit (comparison with a threshold equal to the mean of the\n"
"       current line).\n"
"\n"
"       5.  Linear regression of the points to have the 2 edges of\n"
"       the slit, and write the result in the output table.\n"
"\n"
"OPTIONS\n"
"       -o or --output outfile\n"
"               Specify the output files base name.\n"
"\n"
"       -w or --max_width width\n"
"               Specify the maximum slit width  in pixels. Default\n"
"               is 20\n"
"\n"
"FILES\n"
"       The output table name is [out].tfits if an output basename\n"
"       is  specified.   In  the  other  case,  it  is  [in]_slit­\n"
"       pos.tfits.   The  output  table  contains  3 columns whose\n"
"       labels are: LEFT_POSITION CENTER_POSITION and  RIGHT_POSI­\n"
"       TION.  These columns give the positions in FITS convention\n"
"       of the slit.\n"
"\n"
"       Besides,  the  slit  center,  the slit angle are displayed\n"
"       on stdout.\n"
"\n"
"\n"
"\n";