[Insight-users] ITK filter dimensions.

[Jon Haitz Legarreta]

Dear Fabian,
you may solve the issue using a templated filter. The
itk::ImageToImageFilter is templated over its input and output image types,
which, at the same time, are templated over their pixel type and dimension
[1].

Thus, if you define your own filter templated over its input/output image
types (and ideally, inheriting itk's ImageToImageFilter) you'd be able to
specify the type at execution time, when you read your 2D or 3D (even ND)
input.

In order to know the pixel type and dimensions of an image at execution
time, you can get some inspiration from ITK's ReadUnknownImageType example
[2].

HTH,
JON HAITZ

[1] http://www.itk.org/Doxygen/html/classitk_1_1Image.html
[2] http://www.itk.org/Wiki/ITK/Examples/IO/ReadUnknownImageType


On 3 March 2014 19:32, Fabian Torres <fabian.trobles at gmail.com> wrote:

> Hi all.
>
> I´m making a filter in ITK for surface enhancement. This filter is an
> itkImageToImageFilter.
>
> Sometimes I will use this filter with 2D images an sometimes with 3D
> images. The thing is that inside this filter I have to use some other itk
> components and I need to specify the number of dimensions  I´m using. So
> this is a problem since itk does not let me use variables to specify this.
>
> I´m using the next for 3D:
>
> typedef itk::Vector< PixelType, 3 > VectorPixelType;
> typedef itk::Vector< VectorPixelType,  3 > MatrixPixelType;
> typedef itk::SymmetricSecondRankTensor< PixelType,  3 > TensorPixelType;
>
> typedef itk::Image< TensorPixelType,  3 > TensorImageType;
>
> but I also need to work with 2D and use the same filter.
>
> Is there a way to know the number of dimensions of the filter input image,
> and declare the typedefs using this value?
>
>
>
> --
> Fabián Torres Robles
> Maestria en Ciencias en Ingeniería Electrónica
> Ingeniería en Sistemas Electrónicos
> tel. 58081280, 0445534661338
> e-mail fabian.trobles at gmail.com, dae.wong at gmail.com
>
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