[ITK] Fwd: N4BiasCorrection output size

[Vishwanathan Shreyas]

Hi,

I'm using SimpleITK on python. I wanted to perforn N4 bias correction on
the MICCAI BRATS database. For that, first I cast the images to Float32,
which were initially Int16 and then passed it to the filter.

When I saved the output on disk, I found a huge gap between the input and
output sizes.

INPUT: ~2MB
OUPUT: ~33MB !!!

I know that float takes more space, but can we cast the output to Int16
again without loss of information(as I don't believe float pixel values
mean anything)?

Thanks,
Shreyas
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