WlzCompThresh

Mapping and Analysis CD | WlzCompThresh

Usage: WlzCompThresh [-o< out file >] [-d] [-f] [-g] [-x#] [-h] [< in object >]


Options:
      -o Output file name.
      -d Use histogram depth method.
      -f Use histogram foot method.
      -g Use histogram gradient method.
      -h Help, prints this usage message.
      -x# Extra fraction to add to computed threshold value.

      Computes a threshold value from the given histogram using one of the
      following methods:
      WLZ_COMPTHRESH_DEPTH The threshold value is the point on the
      histogram which is maximally (perpendicularly) distant from the
      chord joining the histogram peak with the right hand histogram end
      point.
      WLZ_COMPTHRESH_FOOT The threshold value is intercept of a line fitted
      to the upper slope (90% to 33%) to the right of the histogram main
      peak with the abscissa.
      WLZ_COMPTHRESH_GRADIENT The threshold value is the first point to the
      right of the histogram main peak at which the gradient falls to
      zero.
      The input object is read from stdin and values are written to stdout
      unless the filenames are given.

      Example: WlzCompThresh -g myhist.wlz
      The threshold value is computed using the WLZ_COMPTHRESH_GRADIENT
      method + 5%% and written to the standard output.

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Web page contact: genexweb@hgu.mrc.ac.uk

Last modified:

24/6/2003