[Neuroimaging] Change sform and save

[Markus Gramer]

Hi there,

I am new to nibabel (and also python) so maybe I am making an obvious mistake, but I could not find anything in the manual that would help me…

I am trying to update the sform in a Nifty1 image and save it with:


def update_sform(file_in, file_out, affine_out):

img = nib.load(file_in)

img_hdr = img.header

img_hdr.set_sform(affine_out)

nib.save(img,file_out)


However, I realised that due to the comparison between current header and affine:


np.allclose(self._affine, hdr.get_best_affine()) [spatialimages.py, line 426]


The sform in the header is reset to the affine when I am saving the image. Is there a way to directly set the affine? Or any other method that I can use to achieve this?


Thanks in advance,


Markus
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/neuroimaging/attachments/20150803/bb31be35/attachment.html>