[Insight-users] GradientImageFilter

[Luis Ibanez]

Hi Ramzy,

If you need the two components separately you can
use the RecursiveGaussianImageFilter.

http://www.itk.org/Insight/Doxygen/html/classitk_1_1RecursiveGaussianImageFilter.html

You will find this filter described in the SoftwareGuide


   http://www.itk.org/ItkSoftwareGuide.pdf


Note that use of the SetDirection() method
and the methods

void 	SetZeroOrder ()
void 	SetFirstOrder ()
void 	SetSecondOrder ()

Note also that, in principle, you should smooth the other
direction with the same sigma that you user for the
derivative along the selected direction.

If you want to get the two component together in the
form of an image of Vectors, then you can simply use the

http://www.itk.org/Insight/Doxygen/html/classitk_1_1GradientRecursiveGaussianImageFilter.html


You will have examples on the use of these filters
in the directory:

     Insight/Examples/Filtering

those examples are described in the text of the Software
Guide.



   Regards,


     Luis


---------------------
Ramzy Darwish wrote:

> Hello all,
> For a project I am working on, I need to calculate the gradient at each 
> pixel in each direction (x & y).
> 
> Is there a way to get GradientImageFilter to do the two separately? Or 
> do I somehow tell it which direction I want in the typedef's?
> 
> Thanks,
> ramzy
> 
> _________________________________________________________________