[vtkusers] How extract a 2D slice from a volume using vtkImageReslice??

[adexe]

Hi Adexe,

Use the SetZSlice method in vtkImageViewer.

- Amy



Thanks Ami, but I want to extract a slice x, y or z to view it...then 
I'll try to process it and apply operations such as erosion dilation, 
erosion and thresholding.


thanks in advance.

-Adexe


/At 07:30 AM 8/29/2005, adexe wrote:

Hi, I'm trying to extract a 2D slice from a volume but it's not
working...

I've:

   reader 
(vtkImageReader)---volume_view(vtkImageData)---reslice(vtkImageReslice)---viewer(vtkImageViewer) 


I'want to extract only a slice from volume and view it! The next code is 
an example of what I was trying to do. The number of z slice I want to 
cut in the following code is 40:

/

/
/

/
/

/package require vtk//

/package require vtkinteraction/

/
/

/
       /

/vtkImageReader reader/

/    reader SetDataByteOrderToLittleEndian/

/    reader SetDataScalarTypeToUnsignedShort/

/    reader SetFilePattern "%s.%03d"/

/    reader SetFilePrefix "/mnt/home/adexe/exeda/data/Images/I"/

/    reader SetDataExtent 0 255 0 255 1 160/

/    reader Update/

/
   /

/
vtkImageData volume_view     /

/    volume_view ShallowCopy [reader GetOutput]/

/
   /

/vtkImageReslice reslice/

/
 /

/
vtkMatrix4x4 axesTransform/

/    /

/    axesTransform Identity/

/    #x axis column/

/    axesTransform SetElement 0 0 0/

/    axesTransform SetElement 1 0 1/

/    axesTransform SetElement 2 0 40/

/    axesTransform SetElement 3 0 0.0/

/    #y axis column/

/    axesTransform SetElement 0 1 1/

/    axesTransform SetElement 1 1 0/

/    axesTransform SetElement 2 1 40/

/    axesTransform SetElement 3 1 0.0/

/    #z axis column/

/    axesTransform SetElement 0 2 0/

/    axesTransform SetElement 1 2 0/

/    axesTransform SetElement 2 2 1/

/    axesTransform SetElement 3 2 0.0/

/    #origin column/

/package require vtk/

/package require vtkinteraction/

/
/

/
       /

/vtkImageReader reader/

/    reader SetDataByteOrderToLittleEndian/

/    reader SetDataScalarTypeToUnsignedShort/

/    reader SetFilePattern "%s.%03d"/

/    reader SetFilePrefix "/mnt/home/adexe/exeda/data/Images/I"/

/    reader SetDataExtent 0 255 0 255 1 160/

/    reader Update/

/
   /

/
vtkImageData volume_view     /

/    volume_view ShallowCopy [reader GetOutput]/

/
   /

/vtkImageReslice reslice/

/
 /

/
vtkMatrix4x4 axesTransform/

/    /

/    axesTransform Identity/

/    #x axis column/

/    axesTransform SetElement 0 0 0/

/    axesTransform SetElement 1 0 1/

/    axesTransform SetElement 2 0 40/

/    axesTransform SetElement 3 0 0.0/

/    #y axis column/

/    axesTransform SetElement 0 1 1/

/    axesTransform SetElement 1 1 0/

/    axesTransform SetElement 2 1 40/

/    axesTransform SetElement 3 1 0.0/

/    #z axis column/

/    axesTransform SetElement 0 2 0/

/    axesTransform SetElement 1 2 0/

/    axesTransform SetElement 2 2 1/

/    axesTransform SetElement 3 2 0.0/

/    #origin column/

/    axesTransform SetElement 0 3 0/

/    axesTransform SetElement 1 3 0/

/    axesTransform SetElement 2 3 40/

/    axesTransform SetElement 3 3 1.0/

/
   reslice SetResliceAxes axesTransform/

/    reslice SetInput volume_view/

/    reslice SetOutputExtent 0 255 0 255  0 0/

/   /

/
vtkImageViewer viewer/

/    viewer SetInput [reslice GetOutput]/

/    viewer SetColorLevel 1000/

/    viewer SetColorWindow 800/

/    viewer Render/

/
/

/    axesTransform SetElement 0 3 0/

/    axesTransform SetElement 1 3 0/

/    axesTransform SetElement 2 3 40/

/    axesTransform SetElement 3 3 1.0/

/
   reslice SetResliceAxes axesTransform/

/    reslice SetInput volume_view/

/    reslice SetOutputExtent 0 255 0 255  0 0/

/   /

/
vtkImageViewer viewer/

/    viewer SetInput [reslice GetOutput]/

/    viewer SetColorLevel 1000/

/    viewer SetColorWindow 800/

/    viewer Render/

/
/

Thanks in advance.


Adexe. /