[Insight-developers] blox pipelining

[Damion Shelton]

Hi,

As was suggested at the Feb. meeting, I've been working on pipelining the 
blox classes. This has been mostly completed: filters to convert gradient 
images to blox boundary point images, and blox boundary point images to 
core atoms images are now checked in. The former works perfectly, the 
latter has some issues with const image iterators.

Specifically, in itkBloxBoundaryPointToCoreAtomImageFilter I've had to 
comment out the functions FindCoreAtoms() and 
FindCoreAtomsAtBoundaryPoint() in order to avoid compilation errors.

The problems appear to arise with the lines:

  typedef ImageRegionConstIterator<TInputImage> TImageIteratorType;

  TImageIteratorType imageIt = TImageIteratorType(m_InputPtr,
 
m_InputPtr->GetRequestedRegion() );

Oddly enough, nearly identical code in 
itkGradientImageToBloxBoundaryPointImageFilter works fine. The intent is to 
create a const iterator over the input image, and I'm not quite sure why 
it's not compiling.

Perhaps someone with more const iterator experience can uncomment the 
functions and suggest what might be going wrong?

Incidentally, this should not break the dashboard - I've tested a local 
build and it works fine (with the affected code commented out).

Thanks,

-Damion-