[Insight-users] Mattes MI: "Too many samples map outside..."

[Xabier Artaechevarria Artieda]

Hi Karthik,
Thanks for your answer.
I just set the maximum number of iterations to 174 and applied the  
resulting transform to the moving image. Comparing it to the fixed  
image, the overlapped seemed good.
I tried changing the number of spatial samples (from 1/10 to 1/9) and  
now the registration is working fine. I must admit I do not really  
know why.
Regards,
Xabi




Karthik Krishnan <karthik.krishnan at kitware.com> ha escrito:

> On 2/9/07, Xabier Artaechevarria Artieda <xabiarta at unav.es> wrote:
>>
>> Hallo Christoph,
>> Thanks for the answer.
>> I checked after 174 iterations and the overlap seems in fact good,
>
>
> How did you ascertain the fact that the overlap is good ? (I presume you
> checked the transform, but I don' tsee it printed in the log). There must be
> a significant drift in teh transform from teh initial position to the
> position after 174 iterations to prompt this error.
>
> DId you try resampling with the transform and overlaying the images to make
> sure that the transforms are headed in the right direction ?
>
> and
>> it is considerably better than at the first iteration. Do you think I
>> could solve the problem by using a higher number of spatial samples?
>> Now I am using one tenth of the total voxels.
>
>
> 1/10th for MI is plenty.
>
>
>>



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