[vtkusers] Undesirable smoothing/anti-aliasing when displaying image

[Somesh]

Hi,
I am displaying an image with sharp boundaries in VTK.
However, the boundaries seem to have some kind of smoothing/anti-aliasing
effect.
I have turned of all smoothing feature in the render window, but I still
see this effect.
Viewing the image in ITK-SNAP shows sharp boundaries, which is consistent
with the image.

I have created a test program to illustrate this. The code and data can be
found @

https://github.com/someshSandbox/vtkImageSmoothingBug

The following screenshots should illustrate the problem clearly :
https://github.com/someshSandbox/vtkImageSmoothingBug/tree/master/screenshots


Thanks,
Somesh
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://public.kitware.com/pipermail/vtkusers/attachments/20140924/a2599f9c/attachment.html>