Usage: WlzLaplacian [-o< out object >] [-a] [-s #] [-h] [< in object >]
      Options:
      -o Output object file name.
      -a Take the absolute value of the convolution.
      -s Laplacian convolution kernel size (3, 5, or 7), default 3.
      -h Help, prints this usage message.
      Applies a Laplacian edge enhancement filter to the input Woolz object.
      Objects are read from stdin and written to stdout unless the filenames
      are given.
      Example: WlzLaplacian -o enhanced.wlz myobj.wlz
      The input Woolz object is read from myobj.wlz, filtered and written
      to enhanced.wlz.