[Insight-users] Iterator method problem

[k s]

ITK,

I couldn't figure out what was wrong with the iterator and trying to set
it's start position, so my workaround was to use the itkPasteImageFilter.

Worked great!

Just FYI,

Kathy

-----Original Message-----
From: insight-users-bounces+smythek=u.washington.edu at itk.org
[mailto:insight-users-bounces+smythek=u.washington.edu at itk.org] On Behalf Of
smythek at u.washington.edu
Sent: Friday, May 12, 2006 12:57 PM
To: Luis Ibanez
Cc: Insight-users at itk.org
Subject: Re: [Insight-users] Iterator method problem

Hi Luis,

The documentation doesn't explain this very well. I have two iterators; the
first one works fine (since I start in the corner of the big image anyway).
For the second iterator, I have defined at START and SIZE but the output of
the iterator STARTS at the correct start position but then continues moving
right until it hits the region boundary and then does not return to the
start position's next line, but rather back to the beginning of the region
boundary, like so:

|                       |
|                       |
|        <start>->->->->|
|->->...                |
|        <end>          |
|                       |

when I want


|                       |
|                       |
|        <start>->->->->|
|        ->->...        |
|        ->->...   <end>|
|                       |

Kathy

> You define the initial position of the iterator by setting the Index
> of the iterator region.
>
> like
>
>
>  ImageType::IndexType  start;
>  ImageType::SizeType   size;
>
>  start[0] = 34;
>  start[0] = 25;
>
>  size[0] = 100;
>  size[1] = 200;
>
>  ImageType::RegionType region;
>
>  region.SetSize( size );
>  region.SetIndex( start );
>
>  IteratorType  itr( image, region );
>
>  itr.GoToBegin();
>
>  while( !itr.IsAtEnd() )
>    {
>
>    ++itr;
>    }
>
>
>
>
> Note that if you are iterating over two images you need
> also *two* separate iterators.
>
>
>
>  Regards,
>
>
>
>      Luis
>
>
> ===============================
> smythek at u.washington.edu wrote:
>> Hi ITK,
>> 
>> I've created an ImageRegionIteratorWithIndex iterator called outputIt2
and 
>> want to iterate an entire image into one area of another image.  That
means 
>> I need to set the iterator's starting position and region size.  I set
the 
>> size all right, but I can't set the starting position to where I want it
to 
>> start writing in the large image.  I've tried outputIt2.SetPosition, 
>> outputIt2.SetIndex, and outputIt2.Begin, but all of these methods are
"not 
>> members" according to the error.  When I just type outputIt2.  and wait
for 
>> the tooltip to appear, none of these methods appear.  So how does one set
an 
>> iterator's starting position?
>> 
>> Kathy
>> 
>> _______________________________________________
>> Insight-users mailing list
>> Insight-users at itk.org
>> http://www.itk.org/mailman/listinfo/insight-users
>> 
>> 
>
>
>


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