[Insight-users] Bug in itkImageFunction / itkRayCastInterpolateImageFunction

[Paul de Bruin]

I have been playing with DRRs in ITK and found that I could not get
DigitallyReconstructedRadiograph1.cxx to work. Apparently, the problem
is that
the IsInBuffer method in ImageFunction that is overridden in the
RayCastInterpolateImageFunction class is not declared virtual.
Consequently, the wrong IsInBuffer method is called in
ResampleImageFilter and ray casting fails for rays with begin and end
points outside the volume.

Declaring the appropriate IsInBuffer method virtual in
itkImageFunction.h solved this problem.

Regards,
Paul de Bruin