Mri Loader Decimater

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from numpy import ceil, shape
from nifti import *
 
def read():
    nim = NiftiImage('/home/danc/python/data/standardmri/ch2b.img')
    return nim
    #NiftiImage.save(nim, 'test')
 
def decimate(nim, dec):
    "nim is the mri data in python format"
    "dec is the decimation factor"
 
    startval=ceil(dec/2);
    xend=shape(nim.data)[0]
    yend=shape(nim.data)[1]
    zend=shape(nim.data)[2]
 
    decimg=nim.data[startval::dec,:,:][:,startval::dec,:][:,:,startval::dec]
    return decimg
 
    #[braindecind.x braindecind.y braindecind.z ]=ind2sub(size(braindecimated.img),find(braindecimated.img>0));
 
if __name__ == "__main__":
    def __init__(self):
        self.nim=read()
        self.dec=decimate(self.nim, 5)

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predecimated
postdecimated