Hi,
Erosion is a standard image processing operation - see textbooks or do a search on the internet.
Zero means to remove things by multiplying them by zero (i.e. zeroing the values).
Outliers are generated by many possible means, including physical and physiological processes and noise.
All the best,
Mark
On 24 Jun 2014, at 16:11, SUBSCRIBE FSL Xinfa_Shi <[log in to unmask]> wrote:
> Hi ,
>
> I run the script tbss_1_preproc * .nii.gz ,but I don't understand its function ,as explained “ erode your FA images slightly and zero the end slices (to remove likely outliers from the diffusion tensor fitting)” in user guide .
>
> What do the "erode" and "zero " mean ? How do the outliers generate?
>
> Regards .
>
> Shi Xin-Fa .
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