[Insight-users] curious problem with itkLinearInterpolateFunction

[Kris Thielemans]

Hi all

> After a linear interpolation there is no reason to obtain a
> pixel with value 254 , whose neighborhoods are all 255.
<snip>


I suspect this is a rounding error + truncation. Probably linear
interpolation computes 254.999, and when it gets stored in the image that
gets truncated to 254. If so, that does sound like a bug to me, but not in
the interpolator. (I don't really know ITK yet as this is my first look at
it, so I'm probably wildly off).

Kris Thielemans
Hammersmith Imanet, part of GE Healthcare
Cyclotron Building
Hammersmith Hospital
Du Cane Road
London W12 ONN, United Kingdom
web site address: http://www.hammersmithimanet.com/~kris
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