Hi, The doc for this function doesn't make it clear whether the user may call it with an index point that lies outside the image or not. I can tell you that the code doesn't check the bounds, resulting in uninitialized memory reads [1].
My question is: is that a user error or bug in the evaluation function? If I read the ITK 4.8.2 code correctly, it looks like it takes care of the lower index bound, but not the upper index bound -- so ITK bug? Thanks, -Steve [1] http://my.cdash.org/viewDynamicAnalysisFile.php?id=3780109 Elastix test suite creates a 2D image of size 10x10, then calls the interpolator with coordinates { 12.7, 15.3 }. I believe that is the cause of this diagnostic: UMR ==26834== Invalid read of size 2 ==26834== at 0x62AE77: itk::LinearInterpolateImageFunction<itk::Image<short, 2u>, double>::EvaluateOptimized(itk::LinearInterpolateImageFunction<itk::Image<short, 2u>, double>::Dispatch<2u> const&, itk::ContinuousIndex<double, 2u> const&) const (itkLinearInterpolateImageFunction.h:172) ==26834== by 0x62228A: itk::LinearInterpolateImageFunction<itk::Image<short, 2u>, double>::EvaluateAtContinuousIndex(itk::ContinuousIndex<double, 2u> const&) const (itkLinearInterpolateImageFunction.h:99) ==26834== by 0x61C431: bool TestInterpolators<2u>() (itkAdvancedLinearInterpolatorTest.cxx:171) ==26834== by 0x616CD2: main (itkAdvancedLinearInterpolatorTest.cxx:279) (Later, the code does an out-of-image call in 3D as well)
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