[vtkusers] Half voxel loss during rendering

[David Gobbi]

Hi Seun,

The vtkImageSliceMapper and vtkImageResliceMapper both have a method called
BorderOn() that will extend the rendering by half the sample spacing.

In VTK, a vtkImageData consists of a grid of point data samples.  There is
no "size" associated with these points, just the spacing that separates
them.  Display of an image involves interpolating the data points to fill
in the empty space that exists between them.

 - David


On Tue, Mar 7, 2017 at 11:01 AM, Seun Odutola <seun at rogue-research.com>
wrote:

> Hi everyone,
>
>     I was wondering if anyone is aware of my situation. I work with
> medical images and my general understanding of VTK is that voxels are
> rendered with the centre as their origin. On rendering MPR’s and slices for
> example I notice that there is a loss of half a voxel at both ends of a
> slice (technically an overall loss of a voxel) and would like to know if
> there’s a workaround to getting the half voxel rendered.
>
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