<br>Hi Nicolas,<br><br>Could you please provide more context ?<br><br>Are you doing this with ITK images ? <br><br>Are you doing this with VTK images ?<br><br><br>What you call an "array" is it really a 2D image ?<br>
or a 3D image ?<br><br><br>The relationship between the "array" and the<br>label map is not clearly described in your email.<br><br><br>...<br><br>At first sight, you seem to be trying to rewrite the <br>functionalities of the itkImageClassifierFilter...<br>
<br><br><br> Thanks for any clarifications,<br><br><br> Luis<br><br><br>----------------------------------------------------<br><div class="gmail_quote">On Mon, Jun 29, 2009 at 1:08 PM, Nicolas Rannou <span dir="ltr"><<a href="mailto:nrannou@bwh.harvard.edu">nrannou@bwh.harvard.edu</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Hi all,<br>
<br>
I'm currently trying to process an array, to create a label map associated to this array.<br>
The problem is that I want a fast processing and the method I use is too slow.<br>
<br>
What I do:<br>
<br>
/------------------------------------------------------------/<br>
for(i...){ // 2 for loops to go through the array<br>
for(j...){<br>
for(int k;k=0;k<nbOfLabels){ // A loop to test the value of the pixel to know to which label associate it<br>
if(ArrayToCreateTheLabelMap->GetScalarComponentAsDouble(i,j,...) > x && ArrayToCreateTheLabelMap->GetScalarComponentAsDouble(i,j,...) < y){<br>
ArrayLabelMap->SetScalarComponentFromDouble(i,j) = k; //fill the label map<br>
}<br>
}<br>
}<br>
}<br>
/----------------------------------------------------------/<br>
Do you have any suggestion to increase the time of processing?<br>
Maybe should I use something else than Get/SetScalarComponent.<br>
Is it possible to do a fast mapping, to say that all pixels (in the array or in a volume) between x and y should be egal to 1, between w and z egal to 2... instead of doing these loops?<br>
With 2 labels, the time of processing is ok but as soon as the number of label increases, it becomes too long.<br>
<br>
Thanks,<br>
<br>
Nicolas<br>
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</blockquote></div><br>