Dear ITK users,<br><br>
I am not sure I correctly understand the ITK demons force
implementation. My question is regarding the choice of demon points.
Thirion suggested a threshold on the image gradient norm as criterion
for demon point selection, that is, not all points of moving and/or
fixed image are used for demons force computation.<br>
<br>
In the itkDemonsRegistrationFunction.txx, it seems that all
index points of the fixed image or mapped points of the moving image
are used and only updating values are dropped depending on denominator
values (with a threshold on the image intensity differences).<br><div id=":9k" class="ii gt">
<br>
But I could not find anything related to a demon points selection upper
a certain value of the gradient image intensity. I probably missed
something, can you please clarify me about this?<br>
<br>
Thanks in advance.<br><br>
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