[Insight-users] Creating ITK image with data from IDL

[Saurabh Garg]

Hi Jose,

I am not sure if any such thing exist. Maybe someone else can comment on
it. The least you can do is use image region iterator instead of nested for
loops. Here is an example for your reference:

http://www.itk.org/Wiki/ITK/Examples/Iterators/ImageRegionIterator

HTH
Saurabh

On Thu, Sep 6, 2012 at 1:27 AM, <jose at apollomit.com> wrote:

> Hello ITK Users,
>
> We are creating an OrientedImage from an array of integers (received from
> IDL) in the following way:
>
>   //----------------------------**------------------------------**--------
>   ImageType::IndexType pixelIndex;
>         int i=0;
>         for(ImageType::IndexValueType l = 0; l < params[2]; l++){
>                          for(ImageType::IndexValueType r = 0; r <
> params[1]; r++)
>                                 {
>                                   for(ImageType::IndexValueType s = 0; s <
> params[0]; s++)
>                                         {
>                                         pixelIndex[0] = s;
>                                         pixelIndex[1] = r;
>                                         pixelIndex[2] = l;
>
>                                         image->SetPixel(pixelIndex,**
> input[i]);
>                                         i++;
>                                         }
>                                 }
>         }
>         //----------------------------**---------------------
>
>
>
> I was wondering if I could create this image without having to traverse
> the entire array (and avoid the O(n3) complexity).
> I have an integer array with the values (input[]), so there should be a
> way to just make the image point to the array right? i. e. something like:
> *image  = *input ? or I don't know just another way to create an image that
> I don't have to set pixel by pixel.
> I would greatly appreciate any help.
> thanks
> -Jose
>
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