[Insight-users] Example of ITK

[Ing. Arturo Vargas Olivares]

I'm new in this...
how do I cast my image to float?



On Thu, May 10, 2012 at 2:31 PM, Cagatay Bilgin <bilgincc at gmail.com> wrote:

> Try casting your image to float type before
> you feed to the smoother. That should do it
> I guess.
>
> Cagatay
>
> On Thu, May 10, 2012 at 11:27 AM, Ing. Arturo Vargas Olivares <
> ing.arturo.vargas at gmail.com> wrote:
>
>> Hello to all !!
>>
>> I have implemented this code in order to test an example from the ITK
>> software guide.
>>
>> import numpy as np
>> import scipy.io as ios
>> import matplotlib.pyplot as mplot
>> import matplotlib.cm as cm
>> import SimpleITK as sitk
>> import sys
>> #
>> # Read the image
>> #
>> reader = sitk.ImageFileReader()
>> reader.SetFileName( 'BrainProtonDensitySlice.png' )
>> image = reader.Execute();
>> #
>> # Set up the writer
>> #
>> writer = sitk.ImageFileWriter()
>> writer.SetFileName( 'BrainProtonDensitySlice_out.png' )
>> #
>> # Blur using CurvatureFlowImageFilter
>> #
>> blurFilter = sitk.CurvatureFlowImageFilter()
>> blurFilter.SetNumberOfIterations( 5 )
>> blurFilter.SetTimeStep( 0.125 )
>> image = blurFilter.Execute( image )
>> #
>> # Set up ConnectedImageFilter for segmentation
>> #
>> segmentationFilter = sitk.ConnectedThresholdImageFilter()
>> segmentationFilter.SetLower(150)
>> segmentationFilter.SetUpper(180)
>> segmentationFilter.SetReplaceValue(255)
>> segmentationFilter.SetSeed((60,116))
>> image = segmentationFilter.Execute( image )
>> writer.Execute( image )
>>
>>
>> It seems that everything is OK except the execution of my filters (see
>> below). It says that the Pixel Type is the problem but I don't know how to
>> fix this.
>>
>> Guys, do you have any ideas?
>>
>>
>> ---------------------------------------------------------------------------
>> RuntimeError                              Traceback (most recent call
>> last)
>> C:\Users\Student3\Desktop\MRI images\test8.py in <module>()
>>      22 blurFilter.SetNumberOfIterations( 5 )
>>      23 blurFilter.SetTimeStep( 0.125 )
>> ---> 24 image = blurFilter.Execute( image )
>>      25 #
>>      26 # Set up ConnectedImageFilter for segmentation
>>
>> C:\Python27\lib\site-packages\simpleitk-0.4.0-py2.7-win-amd64.egg\SimpleITK.pyc
>> in Execute(self, *args)
>>    8050
>>    8051         """
>> -> 8052         return _SimpleITK.CurvatureFlowImageFilter_Execute(self,
>> *args)
>>    8053
>>    8054     __swig_destroy__ = _SimpleITK.delete_CurvatureFlowImageFilter
>> RuntimeError: Exception thrown in SimpleITK
>> CurvatureFlowImageFilter_Execute: c:\users\bradley
>> lowekamp\documents\source\simpleitk\code\common\include\sitkMemberFunctionFactory.txx:174:
>> sitk::ERROR: Pixel type: vector of 8-bit unsigned integer is not
>> supported in 2D byclass itk::simple::CurvatureFlowImageFilter
>>
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