[Insight-developers] ITK ImageIO and Read/WriteImageInformation

[Williams, Norman K]

I'm working on a new ImageIO class, and I wondered about the
ReadImageInformation and WriteImageInformation.  These functions are pure
virtual in ImageIOBase, so a subclass must define them.

But the ImageFileReader & ImageFileWriter don't actually call those
functions.  Some ImageIO classes define them as empty functions, and some
-- like NiftiImageIO -- call WriteImageInformation at the top of the Write
method.

So what I'd like to know is what are Read/WriteImageInformation really
for? Are they vestigal remnants of an abandoned feature? Or is there some
way in which they're crucial?




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