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package require vtk
# This script shows the result of an ideal lowpass filter in frequency space.
# Image pipeline
vtkPNGReader reader
reader SetFileName "$VTK_DATA_ROOT/Data/fullhead15.png"
vtkImageFFT fft
fft SetInputConnection [reader GetOutputPort]
#fft DebugOn
vtkImageIdealLowPass lowPass
lowPass SetInputConnection [fft GetOutputPort]
lowPass SetXCutOff 0.2
lowPass SetYCutOff 0.1
lowPass ReleaseDataFlagOff
#lowPass DebugOn
vtkImageViewer viewer
viewer SetInputConnection [lowPass GetOutputPort]
viewer SetColorWindow 10000
viewer SetColorLevel 5000
#viewer DebugOn
viewer Render
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