[Insight-users] Possible bug in Label Overlay Filter

[Maria Alejandra Zuluaga Valencia]

Hello again,

Earlier this morning I posted a message on problems with ExtractImageFilter 
(which I put at the end of the message for follow-up purposes). 

I've performed several tests to find the cause of my error. Since, the input 
images I was using came from  itkLabelOverlayImageFilter, right now I am under 
the hypothesis that the latter is the one that really causes the problem when 3D 
images are used.

In my pipeline I am able of creating a 3D RGB image (mhd/raw format) and I can  
visualize it without any problem. However, once I try to do something with this 
resulting image I get problems. 


At the beginning I was using ExtractImageFilter to obtain a single slice from 
the overlaid image. Since it did not work, I performed the simplest operation 
which consisted in reading  from disk the 3D RGB image and then writing it 
again. In every case, the resulting image contains only noise. If I do this same 
test with a 2D overlaid image, it works perfectly.  


Has anyone experienced the same problem? is there anyway to solve it?

thanks in advance,

Maria A. Zuluaga

Maybe there are some problems regarding R G B channel interleaving/separation?
HTH


On Mon, Mar 28, 2011 at 12:05, Maria Alejandra Zuluaga Valencia 
<mariazulv at yahoo.es> wrote:

Hi,
>I  am using the ExtractImageFilter to obtain a 2D slice from a 3D volume. I  
>used the example from the user's guide and it works OK. However, when I  change 
>the pixel type to RGB (I want to do this for some overlay  images) it fails. The 
>resulting slice is completely noisy. Any idea?
>
>Thanks in advance,
>
>Maria A. Zuluaga
>
>
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