[ITK Community] [Insight-users] SetFixedImageRegion

[Iyas Hamdan]

Hi Matt,
Thanks for your answer,

And I dont actually see what you mean exactly, could you please elaborate a
bit more ?

>From what I understood, I should make this const iterater walks the mask
image, and when he comes across a value that is different from zero I
should save the index which would be the starting index of my region.

Is that it ?

And if so, there would be a problem I think, because I dont have one region
of interest but have two or three sometimes.

So how could I determine the size and starting index in that case ?

Thank you in advance for your answers,

Iyas


On Fri, Feb 21, 2014 at 10:44 PM, Matt McCormick <matt.mccormick at kitware.com
> wrote:

> 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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