hi itkvtk123,<br><br>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.<br>
<br>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.<br><br><br>Kishore<br><br><div class="gmail_quote">On Fri, Sep 18, 2009 at 12:07 PM, <span dir="ltr"><<a href="mailto:itkvtk123@gmx.net">itkvtk123@gmx.net</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">I want to register image1 with image2.<br>
Both images have same size, but I'm only interested in registering a subsection of image2 with image1.<br>
<br>
I used the RegionOfInterest-Filter to request the desired region.<br>
But now registration fails with "region is at least partially outside the largest possible region".<br>
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?).<br>
<br>
Since the ROI way did not work, I would like to try using masks.<br>
However, I did not found an example of creating a spatial object (box) which I can use as a mask.<br>
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.<br>
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.<br>
<br>
Thanks a lot.<br>
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