[Insight-developers] ImageBase->CopyInformation: Number of components per pixel copied

[Stephen R. Aylward]

Hi,

The CopyInformation function of ImageBase sets largestPossibleRegion, 
Spacing, Origin, Directions...all good.

However, it also sets NumberOfComponentsPerPixel.   Perhaps this is 
inappropriate since it is not necessary for the images to have the same 
pixel type for CopyInformation to work.  Perhaps 
NumberOfComponentsPerPixel is conceptually a pixel-type-specific piece 
of information.   Admittedly this is arguable, but consider a filter 
that has a vector image as input and outputs a scalar image...we cannot 
use the CopyInformation command.

Of course, the point is perhaps moot given the need for backward 
compatibility...I cannot think of a backward-compatible solution beyond 
better documentation.

Stephen

-- 
=============================================================
Stephen R. Aylward, Ph.D.
Chief Medical Scientist
Kitware, Inc. - Chapel Hill Office
http://www.kitware.com
Phone: (518)371-3971 x300