[Insight-users] itkImageSource for block of memory

[Daniel Blezek]

Hi Koen,

On 6/19/09 6:38 AM, "Koen Vermeer" <koen at vermeer.tv> wrote:

> On Fri, 2009-06-19 at 07:14 -0400, Bill Lorensen wrote:
>> Take a look at BasicFilters/itkImportImageFilter
> 
> Cool! What about the other way around, like itkExportImageFilter? It
> seems that I cannot find it, but maybe something similar exists with a
> different name?

We do exactly the same thing as you, i.e. use ITK from a different
application.  For the output, to avoid duplicating memory, we do something
like this:

// Allocate output ImageBuffer
ImageBuffer = new T[NumberOfPixels];

itkImage = filter->GetOutput()

itkImage->GetPixelContainer()->SetImportPointer ( (T*)ImageBuffer,
    NumberOfPixels, false );
itkImage->Allocate();

This creates the buffer, and asks ITK to use it.

NB: ITK will re-allocate the output if the size changes, so you have to
check in the itkImage is still using your memory.

if ( itkImage->GetBufferPointer() != ImageBuffer ) {
    // Copy from ITK to your output
} else {
    // All is happy
}

Cheers,
-dan 



-- 
Daniel Blezek, PhD
Medical Imaging Informatics Innovation Center

P 127 or (77) 8 8886
T 507 538 8886
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