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package require vtk
# Image pipeline
vtkPNGReader reader
reader SetFileName "$VTK_DATA_ROOT/Data/fullhead15.png"
vtkImageClip clip
clip SetInputConnection [reader GetOutputPort]
clip SetOutputWholeExtent 80 230 80 230 0 0
clip ClipDataOff
vtkImageGradientMagnitude gradient
gradient SetDimensionality 2
gradient SetInputConnection [clip GetOutputPort]
gradient HandleBoundariesOff
vtkImageChangeInformation slide
slide SetInputConnection [gradient GetOutputPort]
slide SetExtentTranslation -100 -100 0
vtkImageViewer viewer
viewer SetInputConnection [slide GetOutputPort]
viewer SetColorWindow -1000
viewer SetColorLevel 500
viewer Render
source [file join [file dirname [info script]] WindowLevelInterface.tcl]
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