[Insight-users] ITK and VTK

[Pietro Nardelli]

Sorry Luis,

I have another quetion: I'm trying to create a pipeline which uses a
cropped volume (obtained by using the RegionOfInterestImageFilter) as
input of a connected threshold filter. Building it, though, I get an
error: it says that it cannot convert parameter 1 from
'itk::Image<TPixel,VImageDimension> *' to 'const
itk::Image<TPixel,VImageDimension> *'.

What might it be? Any Idea?

Thank you again

Pietro

2012/5/24 Luis Ibanez <luis.ibanez at kitware.com>:
> HI Pietro,
>
> It depends where in your application you are extracting the region.
>
> If you are doing it in the code that deals with visualization and the
> resulting region is only going to be used for display, then the VTK
> filter will do just fine.
>
> On the other hand, if you are doing this in the middle of a pipeline
> and the extracted region is going to be used for subsequent
> processing, you probably should prefer the ITK Region of Interest
> filter:
>
> http://www.itk.org/Doxygen/html/classitk_1_1RegionOfInterestImageFilter.html
>
> since it preserves the orientation (direction cosines) of the image,
> and properly sets the origin in physical coordinates of the output
> image region.  This are very important attributes if you are using
> the resulting image in registration, or if you plan to correlate it
> spatially to the input image.
>
>     Hope this helps,
>
>          Luis
>
>
> ------------------------------------
> On Wed, May 23, 2012 at 12:08 PM, Pietro Nardelli <pie.nardelli at gmail.com>
> wrote:
>>
>> Sorry guys,
>>
>> I have another question: I'm using the class Region of interest to
>> crop a volume of a DICOM dataset, but I found out that in VTK there is
>> the class Extract ROI which seems very similar. Does anyone know what
>> the difference between the 2 classes? Which is the best one?
>>
>> Thank you,
>>
>> Pietro
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