[Insight-users] DescentDirection parameter for deformable registration

[Luis Ibanez]

Hi George,


When you use Mutual Information you want to *Maximize* it.

When you use Normalized Cross Correlation you want to *Maximize* it too.

You may want to look at the descriptions of the Metrics in
the Registration chapter of the ITK Software Guide, as well
as the registration Chapter of the theory book "Insight into
Images".


    Regards,


       Luis



-------------------------
George Iordanescu wrote:

> Hi everybody,
> 
> I have a question about deformable registration parameters:
> 
> I am not sure how to set the DescentDirection if I use the ncc or MI
> Similarity metric.
> 
> My current file looks like this:
> 
> 0 0.99  % Similarity metric (0=mean sq, 1 = ncc, 2=pattern int, 3=MI,
> 5=demons)
> 1.0	% Alpha
> 0	% DescentDirection (1 = max, 0 = min)
> 
> 
> Can I use this:
> 1 0.99  % Similarity metric (0=mean sq, 1 = ncc, 2=pattern int, 3=MI,
> 5=demons)
> 1.0	% Alpha
> 1	% DescentDirection (1 = max, 0 = min)
> 
> Thank you for your help,
> 
> George
> 
> 
> 
>