def probeVolume(self, volumeNode, rulerNode, numOfPoints):
#get ruler end points in RAS coordinates system
p0ras = rulerNode.GetPolyData().GetPoint(0) + (1,)
p1ras = rulerNode.GetPolyData().GetPoint(1) + (1,)
import math, numpy
lineLength = math.sqrt((p0ras[0]-p1ras[0])*(p0ras[0]-p1ras[0]) + (p0ras[1]-p1ras[1])*(p0ras[1]-p1ras[1]) + (p0ras[2]-p1ras[2])*(p0ras[2]-p1ras[2]))
distanceArray = [0]
if (numOfPoints > 1):
distanceArray = numpy.linspace(0,lineLength,numOfPoints)
#The transformation matrix from RAS to IJK coordinates systems
ras2ijk = vtk.vtkMatrix4x4()
volumeNode.GetRASToIJKMatrix(ras2ijk)
p0ijk = [int(round(c)) for c in ras2ijk.MultiplyPoint(p0ras)[:3]]
p1ijk = [int(round(c)) for c in ras2ijk.MultiplyPoint(p1ras)[:3]]
#Create the VTK sampling line
line = vtk.vtkLineSource()
line.SetResolution(numOfPoints)
line.SetPoint1(p0ijk[0], p0ijk[1], p0ijk[2])
line.SetPoint2(p1ijk[0], p1ijk[1], p1ijk[2])
#Creat the VTK probe filter
probe = vtk.vtkProbeFilter()
probe.SetInputConnection(line.GetOutputPort())
probe.SetSourceData(volumeNode.GetImageData())
probe.Update()
# return the sampled array
return probe.GetOutput().GetPointData().GetArray('ImageScalars'), distanceArray
def probeVolume(self,volumeNode,rulerNode):
# get ruler endpoints coordinates in RAS
p0ras = rulerNode.GetPolyData().GetPoint(0)+(1,)
p1ras = rulerNode.GetPolyData().GetPoint(1)+(1,)
# convert RAS to IJK coordinates of the vtkImageData
ras2ijk = vtk.vtkMatrix4x4()
volumeNode.GetRASToIJKMatrix(ras2ijk)
p0ijk = [int(round(c)) for c in ras2ijk.MultiplyPoint(p0ras)[:3]]
p1ijk = [int(round(c)) for c in ras2ijk.MultiplyPoint(p1ras)[:3]]
# create VTK line that will be used for sampling
line = vtk.vtkLineSource()
line.SetResolution(100)
line.SetPoint1(p0ijk[0], p0ijk[1], p0ijk[2])
line.SetPoint2(p1ijk[0], p1ijk[1], p1ijk[2])
# create VTK probe filter and sample the image
probe = vtk.vtkProbeFilter()
probe.SetInputConnection(line.GetOutputPort())
probe.SetSourceData(volumeNode.GetImageData())
probe.Update()
# return VTK array
return probe.GetOutput().GetPointData().GetArray('ImageScalars')
def probeVolume(self, volumeNode, rulerNode):
# initialize vtkLineSource from Slicer ruler
# (ruler endpoints are in RAS)
p0ras4 = rulerNode.GetPolyData().GetPoint(0)+(1,)
p1ras4 = rulerNode.GetPolyData().GetPoint(1)+(1,)
# convert to vtkImageData IJK coordinates
ras2ijk = vtk.vtkMatrix4x4()
volumeNode.GetRASToIJKMatrix(ras2ijk)
p0ijk = [int(round(c)) for c in ras2ijk.MultiplyPoint(p0ras4)[:3]]
p1ijk = [int(round(c)) for c in ras2ijk.MultiplyPoint(p1ras4)[:3]]
# initialize vtkLineSource
line = vtk.vtkLineSource()
line.SetResolution(100) # TODO: make this a parameter!
line.SetPoint1(p0ijk[0], p0ijk[1], p0ijk[2])
line.SetPoint2(p1ijk[0], p1ijk[1], p1ijk[2])
# ready to probe the volume
probe = vtk.vtkProbeFilter()
probe.SetInputConnection(line.GetOutputPort())
probe.SetSourceData(volumeNode.GetImageData())
probe.Update()
data = probe.GetOutput().GetPointData().GetArray('ImageScalars')
for p in range(data.GetNumberOfTuples()):
print data.GetTuple1(p),
print
return data
def ConvertTextureToPointAttribute(modelNode, textureImageNode):
polyData=modelNode.GetPolyData()
textureImageFlipVert=vtk.vtkImageFlip()
textureImageFlipVert.SetFilteredAxis(1)
textureImageFlipVert.SetInputConnection(textureImageNode.GetImageDataConnection())
textureImageFlipVert.Update()
textureImageData=textureImageFlipVert.GetOutput()
pointData=polyData.GetPointData()
tcoords=pointData.GetTCoords()
numOfPoints=pointData.GetNumberOfTuples()
assert numOfPoints==tcoords.GetNumberOfTuples(), "Number of texture coordinates does not equal number of points"
textureSamplingPointsUv=vtk.vtkPoints()
textureSamplingPointsUv.SetNumberOfPoints(numOfPoints)
for pointIndex in xrange(numOfPoints):
uv=tcoords.GetTuple2(pointIndex)
textureSamplingPointsUv.SetPoint(pointIndex, uv[0], uv[1], 0)
textureSamplingPointDataUv=vtk.vtkPolyData()
uvToXyz=vtk.vtkTransform()
textureImageDataSpacingSpacing=textureImageData.GetSpacing()
textureImageDataSpacingOrigin=textureImageData.GetOrigin()
textureImageDataSpacingDimensions=textureImageData.GetDimensions()
uvToXyz.Scale(textureImageDataSpacingDimensions[0]/textureImageDataSpacingSpacing[0], textureImageDataSpacingDimensions[1]/textureImageDataSpacingSpacing[1], 1)
uvToXyz.Translate(textureImageDataSpacingOrigin)
textureSamplingPointDataUv.SetPoints(textureSamplingPointsUv)
transformPolyDataToXyz=vtk.vtkTransformPolyDataFilter()
transformPolyDataToXyz.SetInputData(textureSamplingPointDataUv)
transformPolyDataToXyz.SetTransform(uvToXyz)
probeFilter=vtk.vtkProbeFilter()
probeFilter.SetInputConnection(transformPolyDataToXyz.GetOutputPort())
probeFilter.SetSourceData(textureImageData)
probeFilter.Update()
rgbPoints=probeFilter.GetOutput().GetPointData().GetArray('ImageScalars')
colorArrayRed=vtk.vtkDoubleArray()
colorArrayRed.SetName('ColorRed')
colorArrayRed.SetNumberOfTuples(numOfPoints)
colorArrayGreen=vtk.vtkDoubleArray()
colorArrayGreen.SetName('ColorGreen')
colorArrayGreen.SetNumberOfTuples(numOfPoints)
colorArrayBlue=vtk.vtkDoubleArray()
colorArrayBlue.SetName('ColorBlue')
colorArrayBlue.SetNumberOfTuples(numOfPoints)
for pointIndex in xrange(numOfPoints):
rgb=rgbPoints.GetTuple3(pointIndex)
colorArrayRed.SetValue(pointIndex,rgb[0])
colorArrayGreen.SetValue(pointIndex,rgb[1])
colorArrayBlue.SetValue(pointIndex,rgb[2])
colorArrayRed.Modified()
colorArrayGreen.Modified()
colorArrayBlue.Modified()
pointData.AddArray(colorArrayRed)
pointData.AddArray(colorArrayGreen)
pointData.AddArray(colorArrayBlue)
pointData.Modified()
polyData.Modified()
def probeVolume(self, volumeNode, rulerNode):
p0ras=rulerNode.GetPolyData().GetPoint(0)+(1,)
p1ras=rulerNode.GetPolyData().GetPoint(1)+(1,)
ras2ijk=vtk.vtkMatrix4x4()
volumeNode.GetRASToIJKMatrix(ras2ijk)
p0ijk= [int(round(c)) for c in ras2ijk.MultiplyPoint(p0ras)[:3]]
p1ijk= [int(round(c)) for c in ras2ijk.MultiplyPoint(p1ras)[:3]]
line=vtk.vtkLineSource()
line.SetPoint1(p0ijk[0],p0ijk[1],p0ijk[2])
line.SetPoint2(p1ijk[0],p1ijk[1],p1ijk[2])
line.SetResolution(100)
probe=vtk.vtkProbeFilter()
probe.SetInputConnection(line.GetOutputPort())
probe.SetSourceData(volumeNode.GetImageData())
probe.Update()
return probe.GetOutput().GetPointData().GetArray('ImageScalars')
def updateOutputArray(self,inputVolume,inputRuler,outputArray,numberOfLineSamples):
rulerStartPoint_Ruler = [0,0,0]
rulerEndPoint_Ruler = [0,0,0]
inputRuler.GetPosition1(rulerStartPoint_Ruler)
inputRuler.GetPosition2(rulerEndPoint_Ruler)
rulerStartPoint_Ruler1 = [rulerStartPoint_Ruler[0], rulerStartPoint_Ruler[1], rulerStartPoint_Ruler[2], 1.0]
rulerEndPoint_Ruler1 = [rulerEndPoint_Ruler[0], rulerEndPoint_Ruler[1], rulerEndPoint_Ruler[2], 1.0]
rulerToRAS = vtk.vtkMatrix4x4()
rulerTransformNode = inputRuler.GetParentTransformNode()
if rulerTransformNode:
if rulerTransformNode.IsTransformToWorldLinear():
rulerToRAS.DeepCopy(rulerTransformNode.GetMatrixTransformToParent())
else:
print("Cannot handle non-linear transforms - ignoring transform of the input ruler")
rulerStartPoint_RAS1 = [0,0,0,1]
rulerEndPoint_RAS1 = [0,0,0,1]
rulerToRAS.MultiplyPoint(rulerStartPoint_Ruler1,rulerStartPoint_RAS1)
rulerToRAS.MultiplyPoint(rulerEndPoint_Ruler1,rulerEndPoint_RAS1)
rulerLengthMm = math.sqrt(vtk.vtkMath.Distance2BetweenPoints(rulerStartPoint_RAS1[0:3],rulerEndPoint_RAS1[0:3]))
# Need to get the start/end point of the line in the IJK coordinate system
# as VTK filters cannot take into account direction cosines
rasToIJK = vtk.vtkMatrix4x4()
parentToIJK = vtk.vtkMatrix4x4()
rasToParent = vtk.vtkMatrix4x4()
inputVolume.GetRASToIJKMatrix(parentToIJK)
transformNode = inputVolume.GetParentTransformNode()
if transformNode:
if transformNode.IsTransformToWorldLinear():
rasToParent.DeepCopy(transformNode.GetMatrixTransformToParent())
rasToParent.Invert()
else:
print ("Cannot handle non-linear transforms - ignoring transform of the input volume")
vtk.vtkMatrix4x4.Multiply4x4(parentToIJK, rasToParent, rasToIJK)
rulerStartPoint_IJK1 = [0,0,0,1]
rulerEndPoint_IJK1 = [0,0,0,1]
rasToIJK.MultiplyPoint(rulerStartPoint_RAS1,rulerStartPoint_IJK1)
rasToIJK.MultiplyPoint(rulerEndPoint_RAS1,rulerEndPoint_IJK1)
lineSource = vtk.vtkLineSource()
lineSource.SetPoint1(rulerStartPoint_IJK1[0],rulerStartPoint_IJK1[1],rulerStartPoint_IJK1[2])
lineSource.SetPoint2(rulerEndPoint_IJK1[0], rulerEndPoint_IJK1[1], rulerEndPoint_IJK1[2])
lineSource.SetResolution(numberOfLineSamples-1)
probeFilter=vtk.vtkProbeFilter()
probeFilter.SetInputConnection(lineSource.GetOutputPort())
if vtk.VTK_MAJOR_VERSION <= 5:
probeFilter.SetSource(inputVolume.GetImageData())
else:
probeFilter.SetSourceData(inputVolume.GetImageData())
probeFilter.Update()
probedPoints=probeFilter.GetOutput()
# Create arrays of data
a = outputArray.GetArray()
a.SetNumberOfTuples(probedPoints.GetNumberOfPoints())
x = xrange(0, probedPoints.GetNumberOfPoints())
xStep=rulerLengthMm/(probedPoints.GetNumberOfPoints()-1)
probedPointScalars=probedPoints.GetPointData().GetScalars()
for i in range(len(x)):
a.SetComponent(i, 0, x[i]*xStep)
a.SetComponent(i, 1, probedPointScalars.GetTuple(i)[0])
a.SetComponent(i, 2, 0)
probedPoints.GetPointData().GetScalars().Modified()
def updateOutputTable(self, inputVolumes, inputRuler, outputTable,
lineResolution):
rulerLengthMm = self.computeRulerLength(inputRuler)
distanceArray = self.getArrayFromTable(outputTable,
DISTANCE_ARRAY_NAME)
probedPointsList = []
intensityArrayList = []
for inputVolume in inputVolumes:
# Need to get the start/end point of the line in the IJK coordinate system
# as VTK filters cannot take into account direction cosines
rasToIJK = vtk.vtkMatrix4x4()
parentToIJK = vtk.vtkMatrix4x4()
rasToParent = vtk.vtkMatrix4x4()
inputVolume.GetRASToIJKMatrix(parentToIJK)
transformNode = inputVolume.GetParentTransformNode()
if transformNode:
if transformNode.IsTransformToWorldLinear():
rasToParent.DeepCopy(
transformNode.GetMatrixTransformToParent())
rasToParent.Invert()
else:
print(
"Cannot handle non-linear transforms - ignoring transform of the input volume"
)
vtk.vtkMatrix4x4.Multiply4x4(parentToIJK, rasToParent, rasToIJK)
rulerStartPoint_IJK1 = [0, 0, 0, 1]
rulerEndPoint_IJK1 = [0, 0, 0, 1]
rasToIJK.MultiplyPoint(self.rulerStartPoint_RAS1,
rulerStartPoint_IJK1)
rasToIJK.MultiplyPoint(self.rulerEndPoint_RAS1, rulerEndPoint_IJK1)
lineSource = vtk.vtkLineSource()
lineSource.SetPoint1(rulerStartPoint_IJK1[0],
rulerStartPoint_IJK1[1],
rulerStartPoint_IJK1[2])
lineSource.SetPoint2(rulerEndPoint_IJK1[0], rulerEndPoint_IJK1[1],
rulerEndPoint_IJK1[2])
lineSource.SetResolution(lineResolution - 1)
probeFilter = vtk.vtkProbeFilter()
probeFilter.SetInputConnection(lineSource.GetOutputPort())
probeFilter.SetSourceData(inputVolume.GetImageData())
probeFilter.Update()
probedPoints = probeFilter.GetOutput()
probedPointsList.append(probedPoints)
intensityArrayName = INTENSITY_ARRAY_NAME + '_' + inputVolume.GetName(
)
intensityArrayList.append(
self.getArrayFromTable(outputTable, intensityArrayName))
# Fill tables
for probeIndex in range(len(probedPointsList)):
probedPoints = probedPointsList[probeIndex]
intensityArray = intensityArrayList[probeIndex]
# Create arrays of data
outputTable.GetTable().SetNumberOfRows(
probedPoints.GetNumberOfPoints())
x = range(0, probedPoints.GetNumberOfPoints())
xStep = rulerLengthMm / (probedPoints.GetNumberOfPoints() - 1)
if probeIndex == 0:
for i in range(len(x)):
distanceArray.SetValue(i, x[i] * xStep)
probedPointScalars = probedPoints.GetPointData().GetScalars()
for i in range(len(x)):
intensityArray.SetValue(i, probedPointScalars.GetTuple(i)[0])
def convertTextureToPointAttribute(self, modelNode, textureImageNode,
colorAsVector):
polyData = modelNode.GetPolyData()
textureImageFlipVert = vtk.vtkImageFlip()
textureImageFlipVert.SetFilteredAxis(1)
textureImageFlipVert.SetInputConnection(
textureImageNode.GetImageDataConnection())
textureImageFlipVert.Update()
textureImageData = textureImageFlipVert.GetOutput()
pointData = polyData.GetPointData()
tcoords = pointData.GetTCoords()
numOfPoints = pointData.GetNumberOfTuples()
assert numOfPoints == tcoords.GetNumberOfTuples(
), "Number of texture coordinates does not equal number of points"
textureSamplingPointsUv = vtk.vtkPoints()
textureSamplingPointsUv.SetNumberOfPoints(numOfPoints)
for pointIndex in range(numOfPoints):
uv = tcoords.GetTuple2(pointIndex)
textureSamplingPointsUv.SetPoint(pointIndex, uv[0], uv[1], 0)
textureSamplingPointDataUv = vtk.vtkPolyData()
uvToXyz = vtk.vtkTransform()
textureImageDataSpacingSpacing = textureImageData.GetSpacing()
textureImageDataSpacingOrigin = textureImageData.GetOrigin()
textureImageDataSpacingDimensions = textureImageData.GetDimensions()
uvToXyz.Scale(
textureImageDataSpacingDimensions[0] /
textureImageDataSpacingSpacing[0],
textureImageDataSpacingDimensions[1] /
textureImageDataSpacingSpacing[1], 1)
uvToXyz.Translate(textureImageDataSpacingOrigin)
textureSamplingPointDataUv.SetPoints(textureSamplingPointsUv)
transformPolyDataToXyz = vtk.vtkTransformPolyDataFilter()
transformPolyDataToXyz.SetInputData(textureSamplingPointDataUv)
transformPolyDataToXyz.SetTransform(uvToXyz)
probeFilter = vtk.vtkProbeFilter()
probeFilter.SetInputConnection(transformPolyDataToXyz.GetOutputPort())
probeFilter.SetSourceData(textureImageData)
probeFilter.Update()
rgbPoints = probeFilter.GetOutput().GetPointData().GetArray(
'ImageScalars')
if colorAsVector:
colorArray = vtk.vtkDoubleArray()
colorArray.SetName('Color')
colorArray.SetNumberOfComponents(3)
colorArray.SetNumberOfTuples(numOfPoints)
for pointIndex in range(numOfPoints):
rgb = rgbPoints.GetTuple3(pointIndex)
colorArray.SetTuple3(pointIndex, rgb[0] / 255., rgb[1] / 255.,
rgb[2] / 255.)
colorArray.Modified()
pointData.AddArray(colorArray)
else:
colorArrayRed = vtk.vtkDoubleArray()
colorArrayRed.SetName('ColorRed')
colorArrayRed.SetNumberOfTuples(numOfPoints)
colorArrayGreen = vtk.vtkDoubleArray()
colorArrayGreen.SetName('ColorGreen')
colorArrayGreen.SetNumberOfTuples(numOfPoints)
colorArrayBlue = vtk.vtkDoubleArray()
colorArrayBlue.SetName('ColorBlue')
colorArrayBlue.SetNumberOfTuples(numOfPoints)
for pointIndex in range(numOfPoints):
rgb = rgbPoints.GetTuple3(pointIndex)
colorArrayRed.SetValue(pointIndex, rgb[0])
colorArrayGreen.SetValue(pointIndex, rgb[1])
colorArrayBlue.SetValue(pointIndex, rgb[2])
colorArrayRed.Modified()
colorArrayGreen.Modified()
colorArrayBlue.Modified()
pointData.AddArray(colorArrayRed)
pointData.AddArray(colorArrayGreen)
pointData.AddArray(colorArrayBlue)
pointData.Modified()
polyData.Modified()
def updateOutputArray(self,inputVolume,inputRuler,outputArray,lineResolution):
rulerStartPoint_Ruler = [0,0,0]
rulerEndPoint_Ruler = [0,0,0]
inputRuler.GetPosition1(rulerStartPoint_Ruler)
inputRuler.GetPosition2(rulerEndPoint_Ruler)
rulerStartPoint_Ruler1 = [rulerStartPoint_Ruler[0], rulerStartPoint_Ruler[1], rulerStartPoint_Ruler[2], 1.0]
rulerEndPoint_Ruler1 = [rulerEndPoint_Ruler[0], rulerEndPoint_Ruler[1], rulerEndPoint_Ruler[2], 1.0]
rulerToRAS = vtk.vtkMatrix4x4()
rulerTransformNode = inputRuler.GetParentTransformNode()
if rulerTransformNode:
if rulerTransformNode.IsTransformToWorldLinear():
rulerToRAS.DeepCopy(rulerTransformNode.GetMatrixTransformToParent())
else:
print ("Cannot handle non-linear transforms - ignoring transform of the input ruler")
rulerStartPoint_RAS1 = [0,0,0,1]
rulerEndPoint_RAS1 = [0,0,0,1]
rulerToRAS.MultiplyPoint(rulerStartPoint_Ruler1,rulerStartPoint_RAS1)
rulerToRAS.MultiplyPoint(rulerEndPoint_Ruler1,rulerEndPoint_RAS1)
rulerLengthMm=math.sqrt(vtk.vtkMath.Distance2BetweenPoints(rulerStartPoint_RAS1[0:3],rulerEndPoint_RAS1[0:3]))
# Need to get the start/end point of the line in the IJK coordinate system
# as VTK filters cannot take into account direction cosines
rasToIJK = vtk.vtkMatrix4x4()
parentToIJK = vtk.vtkMatrix4x4()
rasToParent = vtk.vtkMatrix4x4()
inputVolume.GetRASToIJKMatrix(parentToIJK)
transformNode = inputVolume.GetParentTransformNode()
if transformNode:
if transformNode.IsTransformToWorldLinear():
rasToParent.DeepCopy(transformNode.GetMatrixTransformToParent())
rasToParent.Invert()
else:
print ("Cannot handle non-linear transforms - ignoring transform of the input volume")
vtk.vtkMatrix4x4.Multiply4x4(parentToIJK, rasToParent, rasToIJK)
rulerStartPoint_IJK1 = [0,0,0,1]
rulerEndPoint_IJK1 = [0,0,0,1]
rasToIJK.MultiplyPoint(rulerStartPoint_RAS1,rulerStartPoint_IJK1)
rasToIJK.MultiplyPoint(rulerEndPoint_RAS1,rulerEndPoint_IJK1)
lineSource=vtk.vtkLineSource()
lineSource.SetPoint1(rulerStartPoint_IJK1[0],rulerStartPoint_IJK1[1],rulerStartPoint_IJK1[2])
lineSource.SetPoint2(rulerEndPoint_IJK1[0], rulerEndPoint_IJK1[1], rulerEndPoint_IJK1[2])
lineSource.SetResolution(lineResolution-1)
probeFilter=vtk.vtkProbeFilter()
probeFilter.SetInputConnection(lineSource.GetOutputPort())
if vtk.VTK_MAJOR_VERSION <= 5:
probeFilter.SetSource(inputVolume.GetImageData())
else:
probeFilter.SetSourceData(inputVolume.GetImageData())
probeFilter.Update()
probedPoints=probeFilter.GetOutput()
# Create arrays of data
a = outputArray.GetArray()
a.SetNumberOfTuples(probedPoints.GetNumberOfPoints())
x = xrange(0, probedPoints.GetNumberOfPoints())
xStep=rulerLengthMm/(probedPoints.GetNumberOfPoints()-1)
probedPointScalars=probedPoints.GetPointData().GetScalars()
for i in range(len(x)):
a.SetComponent(i, 0, x[i]*xStep)
a.SetComponent(i, 1, probedPointScalars.GetTuple(i)[0])
a.SetComponent(i, 2, 0)
probedPoints.GetPointData().GetScalars().Modified()
