[Insight-users] Registering images using Spatial Object Masks

[Kishore Mosaliganti]

hi itkvtk123,

In the first case of using the ROI filter, the filter resets the origin of
the output to (0,0). If your original images had non-zero origins, then you
might land in trouble. Hence, in your experiments, although you used the
full image and the method still failed.

While registering images, you can request a sub-region to run through your
pipeline by using image2->SetRequestedRegion(  ) method. You need not use a
mask.


Kishore

On Fri, Sep 18, 2009 at 12:07 PM, <itkvtk123 at gmx.net> wrote:

> I want to register image1 with image2.
> Both images have same size, but I'm only interested in registering a
> subsection of image2 with image1.
>
> I used the RegionOfInterest-Filter to request the desired region.
> But now registration fails with "region is at least partially outside the
> largest possible region".
> This is weird, since when I request a ROI which exactly contains the entire
> image, the error occurs as well and when I dont use the ROI filter, the
> error does not occur (-> bug?).
>
> Since the ROI way did not work, I would like to try using masks.
> However, I did not found an example of creating a spatial object (box)
> which I can use as a mask.
> I would like to specify a box in imagespace, e.g. from point (x1,y1) to
> point (x2,y2) everything inside image2 inside this box I want to register
> with image1.
> In the users guide I only found an example of reading the mask from a
> binary file, but I do not want to create a mask image, I want to directly
> create a spatial object and apply it as a mask.
>
> Thanks a lot.
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