[Insight-users] Diagonal Iterator?

[Luis Ibanez]

Hi Alberto,

The LineIterator may be what you are looking for.

http://www.itk.org/Doxygen/html/classitk_1_1LineIterator.html

"LineIterator is an iterator that walks a Bresenham line through an
image. The iterator is constructed similar to other image iterators
except for instead of specifying a region to traverse, you specify two
indices. The interval specified by the two indices is closed. So, a
line iterator specified with the same start and end index will visit
exactly one pixel."

ImageType::IndexType I1;
ImageType::IndexType I2;

 LineConstIterator<ImageType> it(image, I1, I2);
 while (!it.IsAtEnd())
 {
    it.Get();
    ++it;
 }


Where I1, I2 are the indexes of
the diagonal line end points.

You may compute these indexes
from the following pseudo-code:

region =  inputImage->GetLargestPossibleRegion();
I1 = region.GetIndex()
I2 = I1 + region.GetSize() - 1


      Regards,


            Luis


-----------------------------------------------------
On Fri, Dec 10, 2010 at 7:25 AM, Alberto <bertorey at gmail.com> wrote:
> Hi,
>
> I need the diagonal pixels of a DICOM image because I want to compute
> the acumulative histogram  in order to get the maximun slope.
> Does anyone know if there is a simple way to iterate along a diagonal of
> a dicom image or select these pixels ?.
>
> Thank you in advance.
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