[Insight-users] Using spatial objects for masking

[David Pastor]

Hello,

I also have tried to "mask" the registration by setting the region of the 
fixed image, that should be like using a box as spatial object, and I get 
the same problem, the registration starts but does not return the control to 
the main thread... is it necessary to use listeners when you process with 
masks or something like that? I'm using the optimized registration of the 
review if it makes any difference.

Regards,
David


----- Original Message ----- 
From: "David Pastor" <david.pastor at die.upm.es>
To: "Karthik Krishnan" <karthik.krishnan at kitware.com>
Cc: <insight-users at itk.org>
Sent: Friday, November 12, 2010 3:56 PM
Subject: Re: [Insight-users] Using spatial objects for masking


> Hello,
>
> I've tried to use ImageMaskSpatialObject to mask my fixed image, but it 
> seems that it gives me computational problems as the registration starts 
> but never returns the value of the metric. Can it be because it gets 
> really slow? or do I miss something else?
>
> The code works fine if I just remove the line SetFixedImageMask.
>
> An alternative is to use SetFixedImageRegion, but then I'm not very sure 
> that the fixed would be correctly aligned with the moving...
>
> Best
> David
>
>
> ----- Original Message ----- 
> From: "Karthik Krishnan" <karthik.krishnan at kitware.com>
> To: "David Pastor" <david.pastor at die.upm.es>
> Cc: <insight-users at itk.org>
> Sent: Thursday, November 11, 2010 1:23 PM
> Subject: Re: [Insight-users] Using spatial objects for masking
>
>
>> ImageMaskSpatialObject is what you need. You can set these for the
>> fixed and moving image.
>>
>> For limiting metric computation to axis aligned regions in addition,
>> you can use SetFixedImageRegion. This method is not available for the
>> moving image.
>>
>> If you need more fancy region specifications, you can create your own
>> spatial object, since the registration frameowork will accept any
>> fixed and moving spatial object.
>>
>> --
>> karthik
>>
>> On Thu, Nov 11, 2010 at 5:16 PM, David Pastor <david.pastor at die.upm.es> 
>> wrote:
>>> Hello,
>>>
>>> I'm trying to select the right mask for a registration process. I've 
>>> seen
>>> that ImageSpatialObject can be used as mask to restrict the metric to a
>>> specific region, but it does count zero values. ImageMaskSpatial object 
>>> does
>>> not count them as it returns false for isInside, but I'm not sure it 
>>> does it
>>> for the whole image or you can define a region where to check, so what 
>>> I'm
>>> looking for is a mask that defines a region (so a binary spatial object 
>>> is
>>> defined) and within that region it does not count zero values.
>>>
>>> Best,
>>> David
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>>
>