[Insight-users] Why are getBufferAs* methods not available in Java?

[Dan Mueller]

Hi Mathew,

I proposed the sitk::Image::GetBufferAs methods specifically for the
problem you have encountered — an efficient way of transferring an
sitk::Image to a numeric array. (The sitk::ImportImageFilter allows
for conversion the other way from a numeric array to an sitk::Image).

However, my expertise is mainly in C# and so these methods are
currently only wrapped for the C# language. Python has a customized
conversion method using Numpy, which uses the GetBufferAs methods
under-the-hood.

So AFAIK the only reason the GetBufferAs methods are not available in
Java as yet is that the SimpleITK development team has not had the
know-how to wrap the methods specifically for Java. Do you know how
Java might interact with say GetBufferAsFloat which returns float* ?
Any input you have in order to improve SimpleITK is greatly
appreciated!

Cheers, Dan

On 14 March 2013 05:32, Mathew Guilfoyle <mrguilfoyle at gmail.com> wrote:
> Hi, I am trying to use the Java SimpleITK wrapper for medical image
> processing.
>
> I need to do some manipulation of the image as a plain numerical array
> before and after leveraging the ITK segmentation filters.  However, I can't
> find an efficient way of either transferring a numerical array to an SITK
> Image object or reverting an Image object back to a numerical array.  Using
> nested loops to do a per-pixel setPixelAs* or getPixelAs* operation takes an
> inordinate amount of time.
>
> I understand the getPixelContainer method is now deprecated (?) and was
> supposed to be replaced by the getBufferAs* methods, which I can see in the
> Doxygen Image class listing but seem to be suppressed in the Java wrapper
> (v0.6.1).  Is there a way round this?
>
> Many thanks for any help/advice
>
> Mathew
>
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