[Insight-users] (no subject)

Fri Aug 6 06:02:10 EDT 2010

Ops....sorry for my inattention...;-))

Date: Fri, 6 Aug 2010 11:56:30 +0200
Subject: Re: [Insight-users] (no subject)
From: sergio.vera at alma3d.com
To: danysunflower at hotmail.it
CC: insight-users at itk.org

Hi Daniela,
filterCost->SetInput(filter->GetOutput);
lacks the parentheses to the GetOutput() call:

filterCost->SetInput(filter->GetOutput());

regards

On Fri, Aug 6, 2010 at 11:43 AM, Daniela Sacchetto <danysunflower at hotmail.it> wrote:

Thanks Sergio for your suggestions.
I try to use the filter who suggested me but I have some problem and it doesn't run.

I wrote this code:
-------------------------------------------------------------------------------------------------------------------------------------------------

typedef itk::AddConstantToImageFilter<InputImageType,const float,OutputImageType> AddCostantType;

AddCostantType::Pointer filterCost= AddCostantType::New();

filterCost->SetConstant(-0.5);
filterCost->SetInput(filter->GetOutput);

filterCost->Update();
-----------------------------------------------------------------------------------------------------------------------------------

But I have this output:

/home/daniela/Scrivania/Skeleton_ok/DistanceTrasform/DistanceTrasform2.cxx: In function ‘int main(int, char**)’:

/home/daniela/Scrivania/Skeleton_ok/DistanceTrasform/DistanceTrasform2.cxx:124: error: no matching function for call to ‘itk::AddConstantToImageFilter<itk::Image<signed char, 3u>, const float, itk::Image<short int, 3u> >::SetInput(<unresolved overloaded function type>)’

[...]

I included the itkAddConstantToImageFilter.h file in the same folder where I save my code (as I always do when I use header file not included in itk folder...). 
I thinks that I'm doing a stupid error, but I'm not expert in itk and c++, so I need your help.

Thanks of all, 
Regards
Daniela
Date: Fri, 6 Aug 2010 10:52:11 +0200
Subject: Re: [Insight-users] (no subject)
From: sergio.vera at alma3d.com

To: danysunflower at hotmail.it
CC: insight-users at itk.org

Hi Daniela.
Matlab and ITK are completely different environments... it may take a while to adapt.
To substract 0.5 to a image you can use the following filter: itk::AddConstantToImageFilter

to perform the comparation between the images you can use itk::DifferenceImageFilter

regards

On Fri, Aug 6, 2010 at 10:40 AM, Daniela Sacchetto <danysunflower at hotmail.it> wrote:

Hi everyone,
I'm working in itk and I have a problem.

I have to do this operation :
-----------------------------------------------------------------
if (Daverage < (D - 0.5))        (*)
      Dfinal=1

else
     Dfinal=0
-----------------------------------------------------------------
where:

D= is a DistanceMap obtained with itkDanielssonDistanceMapImageFilter;
Daverage = is D filtered with  itkDiscreteGaussianImageFilter;

Dfinal = is a 3D map where pixel are black or white depending from (*).

I'm trying to do it but I have several problems with operations/comparisons between images... Could anyone help me?

For example in Matlab I can simply do:

 D - 0.5
to substract 0.5 to every pixel of my image... I tryed to do the same in itk but it doesn't run...

Thanks all for help
Daniela

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-- 
Sergio Vera

 Alma IT Systems
 C/ Vilana, 4B, 4º 1ª
 08022 Barcelona
 T. (+34) 932 380 592
 www.alma3d.com

-- 
Sergio Vera

 Alma IT Systems
 C/ Vilana, 4B, 4º 1ª
 08022 Barcelona
 T. (+34) 932 380 592
 www.alma3d.com

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