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Day two : 1 March 2013
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Introduction
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Editors - feedback.

What is an image?  How do we read the data from an image?

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What is an image?
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* `What is an image? raw
  <https://raw.github.com/practical-neuroimaging/pna-notebooks/master/what_is_an_image.ipynb>`_
  notebook file for downloading.
* `What is an image? web
  <http://nbviewer.ipython.org/urls/raw.github.com/practical-neuroimaging/pna-notebooks/master/what_is_an_image.ipynb>`_
  notebook presented nicely as a web page.

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Notes
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* The `NIfTI data format <http://nifti.nimh.nih.gov/nifti-1>`_