rescale.py

def rescale(source, target):
    import nibabel as nib 
    import numpy as np
    from nilearn import image

    n = nib.load(source)
    d = np.array(n.dataobj)
    s = n.dataobj.slope
    i = image.new_img_like(n, d/s)
    i.to_filename(target)
    log.info('Rescaling done: %s rescaled to %s'%(source, target))