.. index:: Parameters; 2D CAX Value

2D CAX Value
============

Returns the geometric centre value of the image. If the number of points in the image are even the average of the two or four centre values is returned. If :ref:`Normalise to CAX` is enabled it will return 100%.

**Protocol invocation name**: 2D CAX Value

|Note| Normalisation affects this result.

.. |Note| image:: _static/Note.png