
 Usage

vtkImageAnisotropicDiffusion3D diffuses an volume
iteratively. The neighborhood of the diffusion is determined
by the instance flags. if "Faces" is on, the 6 voxels
adjoined by faces are included in the neighborhood. If
"Edges" is on the 12 edge connected voxels are included, and
if "Corners" is on, the 8 corner connected voxels are
included. "DiffusionFactor" determines how far a pixel value
moves toward its neighbors, and is insensitive to the number
of neighbors chosen. The diffusion is anisotropic because it
only occurs when a gradient measure is below
"GradientThreshold". Two gradient measures exist and are
toggled by the "GradientMagnitudeThreshold" flag. When
"GradientMagnitudeThreshold" is on, the magnitude of the
gradient, computed by central differences, above
"DiffusionThreshold" a voxel is not modified. The
alternative measure examines each neighbor independently.
The gradient between the voxel and the neighbor must be
below the "DiffusionThreshold" for diffusion to occur with
THAT neighbor.
To create an instance of class
vtkImageAnisotropicDiffusion3D, simply invoke its
constructor as follows

    obj = vtkImageAnisotropicDiffusion3D



 Methods

The class vtkImageAnisotropicDiffusion3D has several methods
that can be used. They are listed below. Note that the
documentation is translated automatically from the VTK
sources, and may not be completely intelligible. When in
doubt, consult the VTK website. In the methods listed below,
obj is an instance of the vtkImageAnisotropicDiffusion3D
class.

* string = obj.GetClassName ()
* int = obj.IsA (string name)
* vtkImageAnisotropicDiffusion3D = obj.NewInstance ()
* vtkImageAnisotropicDiffusion3D = obj.SafeDownCast
  (vtkObject o)
* obj.SetNumberOfIterations (int num) - This method sets the
  number of interations which also affects the input
  neighborhood needed to compute one output pixel. Each
  iterations requires an extra pixel layer on the
  neighborhood. This is only relavent when you are trying to
  stream or are requesting a sub extent of the
  "wholeExtent".
* int = obj.GetNumberOfIterations () - Get the number of
  iterations.
* obj.SetDiffusionThreshold (double ) - Set/Get the
  difference threshold that stops diffusion. when the
  difference between two pixel is greater than this
  threshold, the pixels are not diffused. This causes
  diffusion to avoid sharp edges. If the
  GradientMagnitudeThreshold is set, then gradient magnitude
  is used for comparison instead of pixel differences.
* double = obj.GetDiffusionThreshold () - Set/Get the
  difference threshold that stops diffusion. when the
  difference between two pixel is greater than this
  threshold, the pixels are not diffused. This causes
  diffusion to avoid sharp edges. If the
  GradientMagnitudeThreshold is set, then gradient magnitude
  is used for comparison instead of pixel differences.
* obj.SetDiffusionFactor (double ) - Set/Get the difference
  factor
* double = obj.GetDiffusionFactor () - Set/Get the
  difference factor
* obj.SetFaces (int ) - Choose neighbors to diffuse (6
  faces, 12 edges, 8 corners).
* int = obj.GetFaces () - Choose neighbors to diffuse (6
  faces, 12 edges, 8 corners).
* obj.FacesOn () - Choose neighbors to diffuse (6 faces, 12
  edges, 8 corners).
* obj.FacesOff () - Choose neighbors to diffuse (6 faces, 12
  edges, 8 corners).
* obj.SetEdges (int ) - Choose neighbors to diffuse (6
  faces, 12 edges, 8 corners).
* int = obj.GetEdges () - Choose neighbors to diffuse (6
  faces, 12 edges, 8 corners).
* obj.EdgesOn () - Choose neighbors to diffuse (6 faces, 12
  edges, 8 corners).
* obj.EdgesOff () - Choose neighbors to diffuse (6 faces, 12
  edges, 8 corners).
* obj.SetCorners (int ) - Choose neighbors to diffuse (6
  faces, 12 edges, 8 corners).
* int = obj.GetCorners () - Choose neighbors to diffuse (6
  faces, 12 edges, 8 corners).
* obj.CornersOn () - Choose neighbors to diffuse (6 faces,
  12 edges, 8 corners).
* obj.CornersOff () - Choose neighbors to diffuse (6 faces,
  12 edges, 8 corners).
* obj.SetGradientMagnitudeThreshold (int ) - Switch between
  gradient magnitude threshold and pixel gradient threshold.
* int = obj.GetGradientMagnitudeThreshold () - Switch
  between gradient magnitude threshold and pixel gradient
  threshold.
* obj.GradientMagnitudeThresholdOn () - Switch between
  gradient magnitude threshold and pixel gradient threshold.
* obj.GradientMagnitudeThresholdOff () - Switch between
  gradient magnitude threshold and pixel gradient threshold.


* FreeMat_Documentation
* Visualization_Toolkit_Imaging_Classes
* Generated on Thu Jul 25 2013 17:18:33 for FreeMat by
  doxygen_ 1.8.1.1

