[Insight-users] co-occurrence matrix

Sun May 16 20:57:31 EDT 2004

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On Sun, 2004-05-16 at 15:11 -0400, Luis Ibanez wrote:

> Hi Glenn,
> 
> Thanks for contributing your code to ITK.
> 
> The class has been added under
> 
>      Insight/Code/Numerics/Statistics.
> 
> 

Thanks :)

> 
> Your VTK question wasn't quite clear.
> 
> Do you want to take a VTK image and get a cooccurrence
> matrix out of it using ITK ?
> 
> or, do you want to use VTK for visualizing the
> cooccurrence matrix that you computed with ITK ?

I wanted to visualise the cooccurrence matrix with vtk as a grey scale
image.
So I would be visualising  the frequency for each "pair of intensity
values".  
So pairs that have a greater frequency appear as higher intensities in a
grey level image.

In my code I was storing each pair in it's own MeasurementVector.
However I should have 
been increasing the frequency for pairs that are the same. Was this
changed ?

Thanks for the help.

Much appreciated

Glenn 

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On Sun, 2004-05-16 at 15:11 -0400, Luis Ibanez wrote:
<BLOCKQUOTE TYPE=CITE>
<PRE>
<FONT COLOR="#000000">Hi Glenn,</FONT>

<FONT COLOR="#000000">Thanks for contributing your code to ITK.</FONT>

<FONT COLOR="#000000">The class has been added under</FONT>

<FONT COLOR="#000000">     Insight/Code/Numerics/Statistics.</FONT>

</PRE>
</BLOCKQUOTE>
<BR>
Thanks :)<BR>
<BR>
<BLOCKQUOTE TYPE=CITE>
<PRE>

<FONT COLOR="#000000">Your VTK question wasn't quite clear.</FONT>

<FONT COLOR="#000000">Do you want to take a VTK image and get a cooccurrence</FONT>
<FONT COLOR="#000000">matrix out of it using ITK ?</FONT>

<FONT COLOR="#000000">or, do you want to use VTK for visualizing the</FONT>
<FONT COLOR="#000000">cooccurrence matrix that you computed with ITK ?</FONT>
</PRE>
</BLOCKQUOTE>
<PRE>

</PRE>
I wanted to visualise the cooccurrence matrix with vtk as a grey scale image. 
So I would be visualising&nbsp; the frequency for each &quot;pair of intensity values&quot;.&nbsp; 
So pairs that have a greater frequency appear as higher intensities in a grey level image. 
 
In my code I was storing each pair in it's own MeasurementVector. However I should have 
been increasing the frequency for pairs that are the same. Was this changed ? 
 
 
Thanks for the help. 
 
Much appreciated 
 
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Glenn 
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