[ITK Community] [Insight-users] SetFixedImageRegion

[Matt McCormick]

Hi Iyas,

One option would apply the ImageLinearConstIteratorWithIndex [1] to
find the starting index and size that define the ImageRegion.

HTH,
Matt

[1] http://www.itk.org/Doxygen/html/classitk_1_1ImageLinearConstIteratorWithIndex.html

On Fri, Feb 21, 2014 at 8:19 AM, Iyas Hamdan <iyas.hamdan at gmail.com> wrote:
> Hi,
> I'm working on a 2D registration methode. I'm using an affine transformation
> with the metric being the mutual information.
>
>
> The point is that I dont want to consider the whole fixed image in the
> registration process, so what I should do is choose a region of interest.
>
> I have a binary image with a value of 1 where I want to take the pixels in
> consideration ( my ROI ) and 0 elsewhere.
>
> I tried to set the metric fixed image mask to my binary image (using
> spatialobjectmask)
>
> But sometimes I get the next error : "A spacing of 0 is not allowed" even
> thought I'm not changing the spacing at all!
>
> But since the region I want to focus on is a rectangle, I thought maybe it
> would be easier to use FixedImageRegion for the registration process not for
> the metric.
>
> So, my question is, how can I pass my mask to the FixedImageRegion function
> ?
>
> Thanks
>
> Iyas
>
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