WlzContourGeomFilter

Mapping and Analysis CD | WlzContourGeomFilter

Usage: WlzContourGeomFilter [-h] [-o< output file >]

      [-l#] [-m#] [-n#]
      [-p#] [-s#] [-P#] [-S#] [< input file >]
      -h Output this usage message.
      -o Output file name, default is the standard output.
      -l Filter parameter lambda.
      -m Filter parameter mu.
      -n The number of itterations. If the number of itterations
            is not given, then the pass and stop band ripple determine
            the number of itterations.
      -p The band pass frequency parameter (kPB).
      -s The band stop frequency parameter (kSB).
      -P The maximum pass band ripple (dPB).
      -S The maximum stop band ripple (dSB).

      For simple use to smooth a geometric model from a 2D or 3D contour
      don't use lambda and mu. Instead use: Values of kPB in the range
      [0.0100-0.1000], values of kSB in the range [1.000-1.9999]. The default
      ripple values are probably acceptable for most simple filters.
      Simple example, which filters a contour smoothing out voxel edges:
      promptWlzContourGeomFilter -o out.wlz -p 0.1 -s 1.5 -n 100 in.wlz
      This example passes the geometric model from the contour object
      in in.wlz through a low pass filter with a transition band starting
      at 0.1 and ending with the stop band at 1.5. A maximum of 100
      iterations are performed. If the output from the filter was not
      sufficiently smooth then the ripple values could be decreased.
      If you want to design a more complex filter or one that is not a
      low pass (smoothing) filter then see either:
      Gabriel Taubin. Curve and Surface Smoothing without Shrinkage.
      International Conference on Computer Vision (ICCV'95) Conference
      Procedings, 827-857, 1995.
      or
      Gabriel Taubin. A Signal Processing Approach to Fair Surface
      Design. Computer Graphics, 29, 351-358, 1995.
      The parameter values are:
      not set / default kPB = 0.1
      not set / default kSB = 1
      not set / default dPB = 0.25
      not set / default dSB = 0.1
      not set / default lambda = 0
      not set / default mu =       2.11573e-314
      not set / default nItr = 200

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Last modified:

24/6/2003