"f|file=s" => \@filemask,         # filemasks to select several files (DEFAULT: all files)
    "d|dir=s"  => \@dir,              # dirs for scan (DEFAULT: current dir)
    "wiki" =>     \$wiki_output,      # report in wiki-format (DEFAULT: off)
    "f|from=i" => \$from,             # zoom level FROM (or min)
    "t|to=i" =>   \$to,               # zoom level TO (or max)
    "h|help" =>   \$help              # show help