[Insight-users] passing MetaDataDictionary through pipeline & FFT

[Jakub Bican]

Hi,

please, is there a possibility to let filters pass MetaDataDictionary 
through the pipeline during its update?

I encountered this problem: FFTRealToComplex...Filter stores original 
image size in the meta data dictionary to let the following 
FFTComplexToReal...Filter know what was the original image size before 
the decimation of the first dimension by forward transform to (n/2+1). 
So it is then able to reconstruct images with odd size properly. If i 
process complex data by some other filter, these information get lost, 
so the image is not reconstructed well.

Finally, i want to dispute storing the original size by forward FFT 
filter. I think that the "odd/even flag" together with the possibility 
for user to force the filter to override the flag would be much more 
suitable as it allows wider range of operations on image in frequency 
domain (including cropping, padding, etc).

Cheers,
            Jakub