[ITK-users] Casting Point to SizeType and vice versa

[Jonas Teuwen]

Hi all,

I want to extract patches around points using CropImageFilter. To do this,
I need to calculate the correct bounds.
The point itself is an itk::Point object, and then I calculate the
lower_crop and upper_crop. It can be possible these are negative in some
components, which is checked later on and compensated with
ConstantPadImageFilter.

So I need to switch between a Size and Point, which apparently cannot be
implicitly casted.
I am using a for loop to do this, but this is probably not the right way to
do it. So what is the proper way to do this in ITK?
I understand this question is probably very elementary, but your help would
be greatly appreciated.

  itk::Size<3> image_size = image->GetBufferedRegion().GetSize();
  std::cout << "Input size: " << image_size << std::endl;

*  itk::Vector<double, 3> image_size2;*
*  for(int i=0; i<3; ++i)*
*    {*
*      image_size2[i] = image_size[i];*
*    }*


  itk::Vector<double, 3> lower_crop = point - crop_size;
  itk::Vector<double, 3> upper_crop = image_size2 - (point + crop_size) - 1;


Best,
Jonas Teuwen
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