[Insight-users] GradientAnisotropicDiffusionImageFilter

[salah]

Hello all,

I am trying to perform edge-preserving smoothing by the 

GradientAnisotropicDiffusionImageFilter

I used the following parameter values:

filter->SetNumberOfIterations( 5 );
filter->SetTimeStep( 0.125 );
filter->SetConductanceParameter( 3 );

1. I got a warning that 0.125 is not a stable value and that the minimum
   stable values is 0.0625.

2. However with both these values and the other parameter values, the 
   output image is just the same as the input image. I tested this with
   CT input images of USHORT and UCHAR pixel types.

What could the problem be ? what are appropriate values to use with this
   Filter? Does the other edge-preserving smoothing filters differ?


Many thanks,

Zein