[ITK-users] [ITK] WrapITK question: how to cast images with RGB or complex float pixel types to a Numpy array?

[Lowekamp, Bradley (NIH/NLM/LHC) [C]]

Hello,

In C++ ITK I would just use the CastImageFilter inplace to convert from RGBPixel to a vector type. But that doesn’t seemed to be wrapped:

https://github.com/InsightSoftwareConsortium/ITK/blob/master/Modules/Filtering/ImageFilterBase/wrapping/itkCastImageFilter.wrap

I would look into extending the pyBuffer to support the RGBPixel type:

https://github.com/tobiasmaier/itkPyBuffer/blob/master/wrapping/itkPyBuffer.wrap

There should be some information documenting this in the ITK software guide:
https://itk.org/ITK/help/documentation.html

HTH,
Brad

On Jun 20, 2016, at 9:49 AM, Edwin Bennink <hebennink at gmail.com<mailto:hebennink at gmail.com>> wrote:

Hello,


I am searching for a way to access pixel data of unsigned char RGBPixel images and complex float images in Numpy through PyBuffer.

I guess that it should be possible to cast these images to a vector type and access the data without copying, but I can't figure out how. PyBuffer doesn't support RGB or complex images, and it feels stupid to decompose and recompose into a vector image.

What would be a neat solution to this problem? Thanks!


Edwin Bennink
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