Brain Imaging Toolbox Docs

Documentation: Apply Filter  (apply_filter.m
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This utility is used to apply a low-pass, high-pass or band-pass filter to
series of analyze images (.img files). The user chooses the .img files using
the usual SPM dialog. Next, the utility asks for the sampling rate (TR, 
in seconds), the type of filter (low/band/high) and the threshold frequencies
(in Hz). The filter is applied to each voxel separately. The filtered images
are written to the same directory as the source .img files with the letter 'f'
prepended to each filename.

The filtering process is done using  descrete

