[ITK] [ITK-users] simpleitk image casting?

[Bradley Lowekamp]

Hello,

Glad to hear it working for you.

To extract a component from an SimpleITK Image with Vector Pixel you you can use the lengthly name VectorIndexSelection cast filter[1].

And then to compose can use the RealAndImaginaryToComplex[2] filter2.

There are many ways that this could be done. How did you expect it to be in SimpleITK?

Brad


[1] http://www.itk.org/SimpleITKDoxygen/html/classitk_1_1simple_1_1VectorIndexSelectionCastImageFilter.html
[2] http://www.itk.org/SimpleITKDoxygen/html/classitk_1_1simple_1_1RealAndImaginaryToComplexImageFilter.html
On May 19, 2014, at 1:25 PM, Robert.Atwood at diamond.ac.uk wrote:

> Hi,
> I have just discovered the iPython + simpleITK combination and may very well reduce a lot of barriers to the general use of ITK here by virtue of being 'simple' and working very well with NumPy 
> 
> 
> However, I was just trying to implement a relatively simple algorithm previously programmed not using ITK at all .. in this I require the results of the gradient filter interpreted such that the horizontal gradient is the real part of a complex number and the vertical gradient is the imaginary part. I cannot figure out a 'simple' way to do this, can this be done within sitk or must I extrac the array , manipulate it in Numpy , and load it back as an  (complex) image?  Then the script is much less 'simple'!
> 
> Thanks in advance 
> A SimpleITK convert ! 
> 
> Robert
> 
> 
> 
> 
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