[Insight-users] problem with ImageDuplicator

[Silvano Agliozzo]

Hi Sergio,

pay attention in the using of RecursiveGaussianImageFilter. There is an 
open bug ID #584. 

a+

Silvano

On Mon, 23 Feb 2004, Sergio Andres wrote:

> 
> Hi all,
> 
> I'm using several ITK filters such as :
> -RecursiveGaussianImageFilter,
> -AddImageFilter,
> -MultiplyImageFilter
> -and ImageDuplicator
> 
> 
> I got surprised when the results weren't as I expected..
> 
> My code is like this:
> 
>             // auxImage = LxLxLxx + LyLyLyy
>             addFilter->SetInput1(imageLxLxLxx);
>             addFilter->SetInput2(imageLyLyLyy);
>             addFilter->Update();
> 
>             duplicatorFilter->SetInputImage(addFilter->GetOutput());
>             duplicatorFilter->Update();
>             auxImage = duplicatorFilter->GetOutput();
> 
>             // outputImage = LxLxLxx + LyLyLyy + 2LxLxyLy
>             addFilter->SetInput1(auxImage);
>             addFilter->SetInput2(image2LxLyLxy);
>             addFilter->Update();
> 
>             duplicatorFilter->SetInputImage(addFilter->GetOutput());
>             duplicatorFilter->Update();
>             outputImage = duplicatorFilter->GetOutput();
> 
>            
>             diffFilter->SetValidInput(addFilter->GetOutput());
>             diffFilter->SetTestInput(outputImage);
>             diffFilter->Update();
> 
> As you can see above, I use addFilter to calculate = LxLxLxx + LyLyLyy + 
> 2LxLyLxy, and store it in outputImage.
> But then, when I compared the output from addFilter and outputImage ... 
> I see that there is an important difference
> between its values (mean difference about 68.00), when they should have 
> the same values...
> 
> addFilter is an AddImageFilter object
> diffFilter is an DifferenceImageFilter object
> 
> outputImage, auxImage, LxLxLxx and so .. are Image<double,2> objects
> 
> 
> I will appreciate your answer..
> 
> Thanks!
> 
> Sergio.
> 
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