[Insight-users] Array of Iterators

[Bing Jian]

Hi Luis,

   It's still from the Jacobian problem.
After the scalar comoponents are extracted by using ImageAdaptor,
passed to gradient filter and finally stored into an array of
vector images, then I need n input iterators and 1 output iterators to
combine those n gradient images into 1 Jacobian image.
  That's what I am trying to do.

 I have tried this way, but was told that Pointer is not the member of
IteratorType.

 ConstIteratorType::Pointer gradient_it[vector_dimension];
 for (i=0;i<vector_dimension;i++){
		gradient_it[i] = new
ConstIteratorType(gradient_out[i], inputRegion);
		gradient_it[i]->GoToBegin();
	}


-- 
Best wishes,
Bing Jian
bjian at cise . ufl . edu


On Thu, 9 Oct 2003, Luis Ibanez wrote:

>
> Hi Bing,
>
> ITK iterators don't have default constructors.
> (that is, constructor without parameters).
> Henceforth, it is not possible to create arrays
> of iterators.
>
> You could create an array of pointers to iterators
> and then construct them dynamically but... that
> will lack efficiency, safety and elegance. In other
> words, it will be quite ugly   :-/
>
> Could you please describe in more detail what you
> intend to do ?
>
> There may be an alternative way to get there.
>
>
> Thanks
>
>
>     Luis
>
>
> ---------------------------------------
> Bing Jian wrote:
> > How to implement an array of iterators?
> >
> > For single iterator, we can use:
> >     IteratorType      outputIt(  outputImage,         outputRegion );
> >
> > What if I want an array of iterators, say It[],
> > given its corresponding array of images Image[]?
> >
> > Thanks!
> >
>
>
>
>
>