[Insight-developers] ITK ImageIO and Read/WriteImageInformation

[Bradley Lowekamp]

Kent,

The ReadImageInformation is very much used in the ImageFileReader and the ImageSeriesReader. This method is called during the UpdateOutputInformaiton phase of the pipeline. It is what updates the size, spacing origin, etc before the whole image is read. This function is very important to be implemented.

I am unaware on the WriteImageInformation being used in the writes, nor what the expected results would be.

Brad


On Apr 1, 2011, at 4:52 PM, Williams, Norman K wrote:

> 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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========================================================
Bradley Lowekamp  
Lockheed Martin Contractor for
Office of High Performance Computing and Communications
National Library of Medicine 
blowekamp at mail.nih.gov


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