[vtkusers] Copy image data into vtkImageData from a textfile
Lizeth Castellanos
castellanoslizan at gmail.com
Wed Aug 1 17:12:15 EDT 2018
Hi,
I got VTK 7.1.1 in my computer, finally! So, I have tested the two
solutions that you have suggested:
1) using vtkProbeFilter
2) using vtkResampleToImage
*1) *I have adjusted the image dimensions according to my own data and I
am using vtkSmartVolumeMapper, instead of vtkVolumeRaycastMapper.
No errors are generated in the terminal. However, I have been waiting for
several minutes and nothing happens.
Do you have any idea what is wrong?
csvfile="directory path to my csv file/sample.csv"
reader = vtk.vtkDelimitedTextReader()
reader.SetFieldDelimiterCharacters(" ")
reader.DetectNumericColumnsOn()
reader.SetFileName(csvfile)
reader.MergeConsecutiveDelimitersOn()
reader.Update()
tableToPoints = vtk.vtkTableToPolyData()
tableToPoints.SetInputConnection(reader.GetOutputPort())
tableToPoints.SetXColumn('Field 0')
tableToPoints.SetYColumn('Field 1')
tableToPoints.SetZColumn('Field 2')
imageData = vtk.vtkImageData()
imageData.SetDimensions(512, 512, 192)
imageData.SetOrigin(0.0, 0.0, 0.0)
imageData.SetSpacing(1.0, 1.0, 1.0)
probeFilter = vtk.vtkProbeFilter()
probeFilter.SetSourceConnection(tableToPoints.GetOutputPort())
probeFilter.SetInputData(imageData)
probeFilter.Update()
writer = vtk.vtkXMLImageDataWriter()
writer.SetInputData(probeFilter.GetOutput())
writer.SetFileName('out.vti')
writer.Write()
probeFilter.GetOutput().GetPointData().SetActiveScalars('Field 3')
range = probeFilter.GetOutput().GetPointData().GetScalars().GetRange()
colors = vtk.vtkNamedColors()
# Create the standard renderer, render window
# and interactor.
ren = vtk.vtkRenderer()
renWin = vtk.vtkRenderWindow()
renWin.AddRenderer(ren)
iren = vtk.vtkRenderWindowInteractor()
iren.SetRenderWindow(renWin)
# Create transfer mapping scalar value to opacity.
opacityTransferFunction = vtk.vtkPiecewiseFunction()
opacityTransferFunction.AddPoint(range[0], 0.0)
opacityTransferFunction.AddPoint(range[1], 1.0)
# Create transfer mapping scalar value to color.
colorTransferFunction = vtk.vtkColorTransferFunction()
colorTransferFunction.AddRGBPoint(range[0], 0.0, 0.0, 1.0)
colorTransferFunction.AddRGBPoint((range[0]+range[1])*0.5, 0.0, 1.0, 0.0)
colorTransferFunction.AddRGBPoint(range[1], 1.0, 0.0, 0.0)
# The property describes how the data will look.
volumeProperty = vtk.vtkVolumeProperty()
volumeProperty.SetColor(colorTransferFunction)
volumeProperty.SetScalarOpacity(opacityTransferFunction)
volumeProperty.SetScalarOpacityUnitDistance(1.73205080757)
volumeProperty.SetInterpolationTypeToLinear()
# The mapper / ray cast function know how to render the data.
volumeMapper = vtk.vtkSmartVolumeMapper()
volumeMapper.SetInputConnection(probeFilter.GetOutputPort())
volumeMapper.SetBlendModeToComposite()
# The volume holds the mapper and the property and
# can be used to position/orient the volume.
volume = vtk.vtkVolume()
volume.SetMapper(volumeMapper)
volume.SetProperty(volumeProperty)
ren.AddVolume(volume)
ren.SetBackground(colors.GetColor3d("White"))
ren.GetActiveCamera().ParallelProjectionOn()
ren.ResetCameraClippingRange()
ren.ResetCamera()
renWin.SetSize(600, 600)
renWin.Render()
iren.Start()
*2)* I have tested the vtkResampleToImage class, (the solution that you
suggest at the beginning of this thread). However, I get a solid a cube as
output.
Do you have any idea why that happens?
csvfile="directory path to my csv file/sample.csv"
reader = vtk.vtkDelimitedTextReader()
reader.SetFieldDelimiterCharacters(" ")
reader.DetectNumericColumnsOn()
reader.SetFileName(csvfile)
reader.MergeConsecutiveDelimitersOn()
reader.Update()
tableToPoints = vtk.vtkTableToPolyData()
tableToPoints.SetInputConnection(reader.GetOutputPort())
tableToPoints.SetXColumn("Field 0")
tableToPoints.SetYColumn("Field 1")
tableToPoints.SetZColumn("Field 2")
tableToPoints.Update()
resample = vtk.vtkResampleToImage()
resample.SetInputConnection(tableToPoints.GetOutputPort())
resample.SetSamplingDimensions(3, 3, 3)
resample.Update()
scalar = resample.GetOutput().GetPointData().GetArray("Field 3")
resample.GetOutput().GetPointData().SetScalars(scalar)
range = resample.GetOutput().GetPointData().GetScalars().GetRange()
writer = vtk.vtkMetaImageWriter()
writer.SetInputData(resample.GetOutput())
writer.SetFileName('out.mha')
writer.SetCompression(True)
writer.Write()
colors = vtk.vtkNamedColors()
# Create the standard renderer, render window
# and interactor.
ren = vtk.vtkRenderer()
renWin = vtk.vtkRenderWindow()
renWin.AddRenderer(ren)
iren = vtk.vtkRenderWindowInteractor()
iren.SetRenderWindow(renWin)
# Create transfer mapping scalar value to opacity.
opacityTransferFunction = vtk.vtkPiecewiseFunction()
opacityTransferFunction.AddPoint(range[0], 0.0)
opacityTransferFunction.AddPoint(range[1], 1.0)
# Create transfer mapping scalar value to color.
colorTransferFunction = vtk.vtkColorTransferFunction()
colorTransferFunction.AddRGBPoint(range[0], 0.0, 0.0, 1.0)
colorTransferFunction.AddRGBPoint((range[0]+range[1])*0.5, 0.0, 1.0, 0.0)
colorTransferFunction.AddRGBPoint(range[1], 1.0, 0.0, 0.0)
# The property describes how the data will look.
volumeProperty = vtk.vtkVolumeProperty()
volumeProperty.SetColor(colorTransferFunction)
volumeProperty.SetScalarOpacity(opacityTransferFunction)
volumeProperty.SetScalarOpacityUnitDistance(1.73205080757)
volumeProperty.SetInterpolationTypeToLinear()
# The mapper / ray cast function know how to render the data.
volumeMapper = vtk.vtkSmartVolumeMapper()
volumeMapper.SetInputConnection(resample.GetOutputPort())
volumeMapper.SetBlendModeToComposite()
# The volume holds the mapper and the property and
# can be used to position/orient the volume.
volume = vtk.vtkVolume()
volume.SetMapper(volumeMapper)
volume.SetProperty(volumeProperty)
ren.AddVolume(volume)
ren.SetBackground(colors.GetColor3d("White"))
ren.GetActiveCamera().ParallelProjectionOn()
ren.ResetCameraClippingRange()
ren.ResetCamera()
renWin.SetSize(600, 600)
renWin.Render()
iren.Start()
Thanks
Lizeth
On Fri, Jul 27, 2018 at 5:37 PM, kenichiro yoshimi <rccm.kyoshimi at gmail.com>
wrote:
> Hi,
>
> Thank you for sharing your code. At first glance, the parameters of
> imageData have to be set according to your own data.
> ---
> imageData.SetDimensions(512, 512, 192)
> imageData.SetOrigin(0.0, 0.0, 0.0)
> imageData.SetSpacing(1, 1, 1)
> ---
> And would you try to use vtkSmartVolumeMapper, instead of
> vtkVolumeRaycastMapper?
>
> Thanks
> 2018年7月28日(土) 4:03 Lizeth Castellanos <castellanoslizan at gmail.com>:
> >
> > Hi!
> >
> > Thanks for your reply.
> > My doubt was about how to pass the 'Field 3' to the probe filter. I made
> some adjust based in your help. However, the output shows two solid cube
> instead of the points from my segmented dataset.
> >
> > I am sending the code and the screenshot of the output. Thanks again :-)
> >
> > reader = vtk.vtkDelimitedTextReader()
> > reader.SetFieldDelimiterCharacters(' ')
> > reader.DetectNumericColumnsOn()
> > reader.SetFileName('sample.csv')
> > reader.MergeConsecutiveDelimitersOn()
> > reader.Update()
> >
> > tableToPoints = vtk.vtkTableToPolyData()
> > tableToPoints.SetInputConnection(reader.GetOutputPort())
> > tableToPoints.SetXColumn('Field 0')
> > tableToPoints.SetYColumn('Field 1')
> > tableToPoints.SetZColumn('Field 2')
> > tableToPoints.Update()
> >
> > imageData = vtk.vtkImageData()
> > imageData.SetDimensions(3, 3, 3)
> > imageData.SetOrigin(0.0, 0.0, 0.0)
> > imageData.SetSpacing(1.0, 1.0, 1.0)
> > imageData.Update()
> >
> > probeFilter = vtk.vtkProbeFilter()
> > probeFilter.SetSourceConnection(tableToPoints.GetOutputPort())
> > probeFilter.SetInput(imageData)
> > probeFilter.Update()
> >
> > probeFilter.GetOutput().GetPointData().SetActiveScalars('Field 3')
> > scalarRange = probeFilter.GetOutput().GetPointData().GetScalars().
> GetRange()
> >
> > writer = vtk.vtkXMLImageDataWriter()
> > writer.SetInput(probeFilter.GetOutput())
> > writer.SetFileName('out.vti')
> > writer.Write()
> >
> > # Create transfer mapping scalar value to opacity.
> > opacityTransferFunction = vtk.vtkPiecewiseFunction()
> > opacityTransferFunction.AddPoint(scalarRange[0], 0.0)
> > opacityTransferFunction.AddPoint(scalarRange[1], 0.5)
> >
> > # Create transfer mapping scalar value to color.
> > colorTransferFunction = vtk.vtkColorTransferFunction()
> > colorTransferFunction.AddRGBPoint(scalarRange[0], 0.0, 0.0, 1.0)
> > colorTransferFunction.AddRGBPoint((scalarRange[0]+scalarRange[1])*0.5,
> 0.0, 1.0, 0.0)
> > colorTransferFunction.AddRGBPoint(scalarRange[1], 1.0, 0.0, 0.0)
> >
> > # The property describes how the data will look.
> > volumeProperty = vtk.vtkVolumeProperty()
> > volumeProperty.SetColor(colorTransferFunction)
> > volumeProperty.SetScalarOpacity(opacityTransferFunction)
> > volumeProperty.SetScalarOpacityUnitDistance(1.73205080757)
> > volumeProperty.SetInterpolationTypeToLinear()
> > volumeProperty.ShadeOn()
> >
> > # vtkVolumeRayCastMapper need data of type unsigned char or unsigned
> short
> > cast = vtk.vtkImageCast()
> > cast.SetInputConnection(probeFilter.GetOutputPort())
> > cast.SetOutputScalarTypeToUnsignedChar()
> > cast.Update()
> >
> > ## The mapper / ray cast function know how to render the data
> > compositeFunction = vtk.vtkVolumeRayCastCompositeFunction()
> > volumeMapper = vtk.vtkVolumeRayCastMapper()
> > volumeMapper.SetVolumeRayCastFunction(compositeFunction)
> > volumeMapper.SetInputConnection(cast.GetOutputPort())
> >
> >
> > #The volume holds the mapper and the property.
> > volume = vtk.vtkVolume()
> > volume.SetMapper(volumeMapper)
> > volume.SetProperty(volumeProperty)
> >
> > #Create the standard renderer, render window and interactor
> > ren = vtk.vtkRenderer()
> >
> > renWin = vtk.vtkRenderWindow()
> > renWin.AddRenderer(ren)
> >
> > iren = vtk.vtkRenderWindowInteractor()
> > iren.SetRenderWindow(renWin)
> >
> > ren.AddVolume(volume)
> > ren.SetBackground(1, 1, 1)
> > renWin.SetSize(600, 600)
> > renWin.Render()
> >
> > iren.Initialize()
> > renWin.Render()
> > iren.Start()
> >
> >
> >
> >
> > On Thu, Jul 26, 2018 at 9:35 PM, kenichiro yoshimi <
> rccm.kyoshimi at gmail.com> wrote:
> >>
> >> Hi,
> >>
> >> Your question is not clear enough. If you possible, can you post your
> >> code? I don't have a problem with volume rendering in my code.
> >>
> >> ----
> >> import vtk
> >>
> >>
> >> def main():
> >>
> >> reader = vtk.vtkDelimitedTextReader()
> >> reader.SetFileName('sample.csv')
> >> reader.DetectNumericColumnsOn()
> >> reader.SetFieldDelimiterCharacters(' ')
> >> reader.MergeConsecutiveDelimitersOn()
> >>
> >> tableToPoints = vtk.vtkTableToPolyData()
> >> tableToPoints.SetInputConnection(reader.GetOutputPort())
> >> tableToPoints.SetXColumn('Field 0')
> >> tableToPoints.SetYColumn('Field 1')
> >> tableToPoints.SetZColumn('Field 2')
> >>
> >> imageData = vtk.vtkImageData()
> >> imageData.SetDimensions(3, 3, 3)
> >> imageData.SetOrigin(0.0, 0.0, 0.0)
> >> imageData.SetSpacing(1.0, 1.0, 1.0)
> >>
> >> probeFilter = vtk.vtkProbeFilter()
> >> probeFilter.SetSourceConnection(tableToPoints.GetOutputPort())
> >> probeFilter.SetInputData(imageData)
> >> probeFilter.Update()
> >>
> >> writer = vtk.vtkXMLImageDataWriter()
> >> writer.SetInputData(probeFilter.GetOutput())
> >> writer.SetFileName('out.vti')
> >> writer.Write()
> >>
> >> probeFilter.GetOutput().GetPointData().SetActiveScalars('Field 3')
> >> range = probeFilter.GetOutput().GetPointData().GetScalars().
> GetRange()
> >>
> >> colors = vtk.vtkNamedColors()
> >>
> >> # Create the standard renderer, render window
> >> # and interactor.
> >> ren = vtk.vtkRenderer()
> >>
> >> renWin = vtk.vtkRenderWindow()
> >> renWin.AddRenderer(ren)
> >>
> >> iren = vtk.vtkRenderWindowInteractor()
> >> iren.SetRenderWindow(renWin)
> >>
> >> # Create transfer mapping scalar value to opacity.
> >> opacityTransferFunction = vtk.vtkPiecewiseFunction()
> >> opacityTransferFunction.AddPoint(range[0], 0.0)
> >> opacityTransferFunction.AddPoint(range[1], 1.0)
> >>
> >> # Create transfer mapping scalar value to color.
> >> colorTransferFunction = vtk.vtkColorTransferFunction()
> >> colorTransferFunction.AddRGBPoint(range[0], 0.0, 0.0, 1.0)
> >> colorTransferFunction.AddRGBPoint((range[0]+range[1])*0.5, 0.0,
> 1.0, 0.0)
> >> colorTransferFunction.AddRGBPoint(range[1], 1.0, 0.0, 0.0)
> >>
> >> # The property describes how the data will look.
> >> volumeProperty = vtk.vtkVolumeProperty()
> >> volumeProperty.SetColor(colorTransferFunction)
> >> volumeProperty.SetScalarOpacity(opacityTransferFunction)
> >> volumeProperty.SetScalarOpacityUnitDistance(1.73205080757)
> >> volumeProperty.SetInterpolationTypeToLinear()
> >>
> >> # The mapper / ray cast function know how to render the data.
> >> volumeMapper = vtk.vtkSmartVolumeMapper()
> >> volumeMapper.SetInputConnection(probeFilter.GetOutputPort())
> >> volumeMapper.SetBlendModeToComposite()
> >>
> >> # The volume holds the mapper and the property and
> >> # can be used to position/orient the volume.
> >> volume = vtk.vtkVolume()
> >> volume.SetMapper(volumeMapper)
> >> volume.SetProperty(volumeProperty)
> >>
> >> ren.AddVolume(volume)
> >>
> >> ren.SetBackground(colors.GetColor3d("White"))
> >> ren.GetActiveCamera().ParallelProjectionOn()
> >> ren.ResetCameraClippingRange()
> >> ren.ResetCamera()
> >>
> >> renWin.SetSize(600, 600)
> >> renWin.Render()
> >>
> >> iren.Start()
> >>
> >>
> >> if __name__ == '__main__':
> >> main()
> >> ----
> >>
> >> Regards
> >> 2018年7月26日(木) 0:15 Lizeth Castellanos <castellanoslizan at gmail.com>:
> >> >
> >> > Thanks for your answers!
> >> >
> >> > For the case 2) I have one more question: How can I add the scalar
> values from the intensity ('Field 3') to the data?
> >> >
> >> > I have added those two lines to your code:
> >> >
> >> > scalar = probeFilter.GetOutput().GetPointData().GetArray('Field 3')
> >> > probeFilter.GetOutput().GetPointData().SetScalars(scalar)
> >> >
> >> > But when I render the volume, nothing is displayed in the render
> window.
> >> >
> >> > Thanks
> >> >
> >> > Lizeth
> >> >
> >> >
> >> >
> >> >
> >> >
> >> > On Tue, Jul 24, 2018 at 11:29 PM, kenichiro yoshimi <
> rccm.kyoshimi at gmail.com> wrote:
> >> >>
> >> >> Hi,
> >> >>
> >> >> 1) You need to specify PYTHON_INCLUDE_DIR and PYTHON_LIBRARY to suit
> >> >> your own system in the 'advanced options' in cmake.
> >> >>
> >> >> PYTHON_INCLUDE_DIR will be the name of the directory containing the
> Python.h:
> >> >> e.g. /usr/include/python2.7
> >> >> PYTHON_LIBRARY will be the full path to libpython2.7.so (or.a):
> >> >> e.g. /usr/lib64/libpython2.7.so
> >> >>
> >> >> 2) For example, if you apply vtkProbeFilter to sample.csv in the
> >> >> previous my post, script is something like below.
> >> >>
> >> >> ---
> >> >> import vtk
> >> >>
> >> >>
> >> >> def main():
> >> >>
> >> >> reader = vtk.vtkDelimitedTextReader()
> >> >> reader.SetFileName('sample.csv')
> >> >> reader.DetectNumericColumnsOn()
> >> >> reader.SetFieldDelimiterCharacters(' ')
> >> >> reader.MergeConsecutiveDelimitersOn()
> >> >>
> >> >> tableToPoints = vtk.vtkTableToPolyData()
> >> >> tableToPoints.SetInputConnection(reader.GetOutputPort())
> >> >> tableToPoints.SetXColumn('Field 0')
> >> >> tableToPoints.SetYColumn('Field 1')
> >> >> tableToPoints.SetZColumn('Field 2')
> >> >>
> >> >> imageData = vtk.vtkImageData()
> >> >> imageData.SetDimensions(3, 3, 3)
> >> >> imageData.SetOrigin(0.0, 0.0, 0.0)
> >> >> imageData.SetSpacing(1.0, 1.0, 1.0)
> >> >>
> >> >> probeFilter = vtk.vtkProbeFilter()
> >> >> probeFilter.SetSourceConnection(tableToPoints.GetOutputPort())
> >> >> probeFilter.SetInputData(imageData)
> >> >> probeFilter.Update()
> >> >>
> >> >> writer = vtk.vtkXMLImageDataWriter()
> >> >> writer.SetInputData(probeFilter.GetOutput())
> >> >> writer.SetFileName('out.vti')
> >> >> writer.Write()
> >> >>
> >> >>
> >> >> if __name__ == '__main__':
> >> >> main()
> >> >> ---
> >> >>
> >> >> For your reference.
> >> >> 2018年7月25日(水) 4:10 Lizeth Castellanos <castellanoslizan at gmail.com>:
> >> >> >
> >> >> > Thanks for your help Kenichiro Yoshimi
> >> >> >
> >> >> > I was able to reproduce some part of your code. However, I
> encountered new issues.
> >> >> >
> >> >> > 1)I have all my project under VTK 5.10.1 with python 2.7.12 in
> linux. I got this error: 'module' object has no attribute
> 'vtkResampleToImage'.
> >> >> > So I guess that the vtkResampleToImage class is not avaliable for
> my VTK version.
> >> >> > I tried to build a newer VTK version but I didn't get success. I
> tried with VTK 7.1.1 and I got errors related to the python libs Could NOT
> find PythonLibs (missing: PYTHON_LIBRARIES PYTHON_INCLUDE_DIRS).
> >> >> >
> >> >> > 2) I read that vtkResampleToImage samples a dataset on a uniform
> grid and it internally uses vtkProbeFilter to do the probing. So, Is there
> any way to use vtkProbeFilter instead of vtkResampleToImage?
> >> >> > I have tested some examples from vtkProbeFilter but I am confused
> about how use it in my specific problem.
> >> >> >
> >> >> > Thanks,
> >> >> >
> >> >> > Lizeth
> >> >> >
> >> >> > On Thu, Jul 19, 2018 at 12:38 AM, kenichiro yoshimi <
> rccm.kyoshimi at gmail.com> wrote:
> >> >> >>
> >> >> >> Hi Lizeth,
> >> >> >>
> >> >> >> Because vtkDelimitedTextReader outputs a vtkTable, you firstly
> need to
> >> >> >> convert it to a vtkPolyData using vtkTableToPolyData. And then
> you can
> >> >> >> use vtkResampleToImage to map the polyData to vtkImageData.
> >> >> >>
> >> >> >> ---sample.csv---
> >> >> >> 0 0 0 60.7635
> >> >> >> 1 0 0 107.555
> >> >> >> 2 0 0 80.5241
> >> >> >> 0 1 0 85.9694
> >> >> >> 1 1 0 156.706
> >> >> >> 2 1 0 105.73
> >> >> >> 0 2 0 37.3531
> >> >> >> 1 2 0 84.1445
> >> >> >> 2 2 0 57.1137
> >> >> >> 0 0 1 100.634
> >> >> >> 1 0 1 171.37
> >> >> >> 2 0 1 120.395
> >> >> >> 0 1 1 149.785
> >> >> >> 1 1 1 260
> >> >> >> 2 1 1 169.546
> >> >> >> 0 2 1 77.2238
> >> >> >> 1 2 1 147.96
> >> >> >> 2 2 1 96.9844
> >> >> >> 0 0 2 60.7635
> >> >> >> 1 0 2 107.555
> >> >> >> 2 0 2 80.5241
> >> >> >> 0 1 2 85.9694
> >> >> >> 1 1 2 156.706
> >> >> >> 2 1 2 105.73
> >> >> >> 0 2 2 37.3531
> >> >> >> 1 2 2 84.1445
> >> >> >> 2 2 2 57.1137
> >> >> >>
> >> >> >> ---
> >> >> >> import vtk
> >> >> >>
> >> >> >>
> >> >> >> def main():
> >> >> >> colors = vtk.vtkNamedColors()
> >> >> >>
> >> >> >> reader = vtk.vtkDelimitedTextReader()
> >> >> >> reader.SetFileName('sample.csv')
> >> >> >> reader.DetectNumericColumnsOn()
> >> >> >> reader.SetFieldDelimiterCharacters(' ')
> >> >> >> reader.MergeConsecutiveDelimitersOn()
> >> >> >>
> >> >> >> tableToPoints = vtk.vtkTableToPolyData()
> >> >> >> tableToPoints.SetInputConnection(reader.GetOutputPort())
> >> >> >> tableToPoints.SetXColumn('Field 0')
> >> >> >> tableToPoints.SetYColumn('Field 1')
> >> >> >> tableToPoints.SetZColumn('Field 2')
> >> >> >>
> >> >> >> resample = vtk.vtkResampleToImage()
> >> >> >> resample.SetInputConnection(tableToPoints.GetOutputPort())
> >> >> >> resample.SetSamplingDimensions(3, 3, 3)
> >> >> >> resample.Update()
> >> >> >>
> >> >> >> scalar = resample.GetOutput().GetPointData().GetArray('Field
> 3')
> >> >> >> resample.GetOutput().GetPointData().SetScalars(scalar)
> >> >> >>
> >> >> >> writer = vtk.vtkMetaImageWriter()
> >> >> >> writer.SetInputData(resample.GetOutput())
> >> >> >> writer.SetFileName('out.mha')
> >> >> >> writer.SetCompression(True)
> >> >> >> writer.Write()
> >> >> >>
> >> >> >>
> >> >> >> if __name__ == '__main__':
> >> >> >> main()
> >> >> >> ---
> >> >> >>
> >> >> >> Best
> >> >> >> 2018年7月19日(木) 3:43 Lizeth Castellanos <castellanoslizan at gmail.com
> >:
> >> >> >> >
> >> >> >> > Hi!
> >> >> >> >
> >> >> >> > I'd like to copy image data from a textfile (csv) into
> vtkImageData.
> >> >> >> > The textfile have voxel values for x,y,z and image intensity.
> I already have read the textfile into VTK with the vtkDelimitedTextReader
> class:
> >> >> >> >
> >> >> >> > Table loaded from CSV file:
> >> >> >> > +-----------+-----------+-----------+------------+
> >> >> >> > | Field 0 | Field 1 | Field 2 | Field 3 |
> >> >> >> > +-----------+-----------+-----------+------------+
> >> >> >> > | 510 | 291 | 0 | 32 |
> >> >> >> > | 511 | 291 | 0 | 128 |
> >> >> >> > | 510 | 292 | 0 | 104 |
> >> >> >> > | 511 | 292 | 0 | 104 |
> >> >> >> > | 510 | 293 | 0 | 40 |
> >> >> >> > | 511 | 293 | 0 | 240 |
> >> >> >> > | 510 | 294 | 0 | 104 |
> >> >> >> > | 511 | 294 | 0 | 96 |
> >> >> >> > | 506 | 295 | 0 | 64 |
> >> >> >> > | 507 | 295 | 0 | 16 |
> >> >> >> > .....
> >> >> >> > .....
> >> >> >> > The file is an exported segmented dataset.
> >> >> >> >
> >> >> >> > I am following the tips from this similar question
> http://vtk.1045678.n5.nabble.com/importing-image-data-into-
> VTK-from-textfile-mimics-td1243332.html
> >> >> >> > I have created an appropriate vtkimagedata (volume):
> >> >> >> >
> >> >> >> > imageData = vtk.vtkImageData()
> >> >> >> > imageData.SetDimensions(512, 512, 192)
> >> >> >> > imageData.SetOrigin(0.0, 0.0, 0.0)
> >> >> >> > imageData.SetSpacing(1, 1, 1)
> >> >> >> > imageData.SetNumberOfScalarComponents(1)
> >> >> >> > imageData.Update()
> >> >> >> >
> >> >> >> > However I don't know how to copy the data loaded from
> vtkDelimitedTextReader into vtkImageData. How do I copy the x,y,z voxel
> values into vtkImageData? How do I copy the intensity valuesVtkImageData?
> >> >> >> >
> >> >> >> > Any help provided for this would be greatly appreciated!
> >> >> >> >
> >> >> >> > Lizeth
> >> >> >> >
> >> >> >> >
> >> >> >> > _______________________________________________
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> >> >> >> >
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> >> >> >> >
> >> >> >> > Please keep messages on-topic and check the VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
> >> >> >> >
> >> >> >> > Search the list archives at: http://markmail.org/search/?q=
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> >> >> >> >
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> >> >> >
> >> >> >
> >> >> >
> >> >> >
> >> >> > --
> >> >> >
> >> >> >
> >> >> >
> >> >
> >> >
> >> >
> >> >
> >> > --
> >> >
> >> >
> >> >
> >
> >
> >
> >
> > --
> > Lizeth Castellanos.
> > PhD Student
> > Federal University of Rio Grande do Sul (UFRGS)
> >
> >
>
--
Lizeth Castellanos.
PhD Student
Federal University of Rio Grande do Sul (UFRGS)
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