[Insight-users] multiple inputs and different size

[Luis Ibanez]

Hi Rashindra,

Yes, in the case that you describe,
you should implement the functions:


    GenerateInputRequestedRegion()
    GenerateOutputInformation()


because the default implementation of
these methods assume that the input and
the output images are going to have the
same sizes.


    Regards,


       Luis


==========================
Rashindra Manniesing wrote:
> 	
> HI,
> 
> Any advice on the following would be highly appreciated:
> 
> I am writing a class derived from ImageToImageFilter which has two
> inputs and one output. One input and the output have the same properties
> (dimension, sizes, pixeltype), the other (optional) input has a
> different pixeltype and a different size (in x direction). It looks
> something like this (the optional second input can be set by public
> member functions)
> 
> template <class TInputImage, class TOutputImage>
> class ITK_EXPORT A:
>         public ImageToImageFilter<TInputImage,TOutputImage>
> {
> 	// input same size/dim as output
> 	// Input/OutputPixelType is real
> 
> 	// Second input, different size/pixeltype
>         typedef Image<std::complex<InputPixelType>, ImageDimension>
> SecondImageType;
>         void SetSecondImage(const SecondImageType *);
>         const SecondImageType * GetSecondImage(void);
> 
> }
> 
> Input2 is the fourier transform of input1 and internally, after the
> required calculations, the result (image) will be backtransformed to
> real domain (using itkFFTWComplextoReal ..). 
> 
> My questions:
> 
> - Because itkFFTWComplexToReal already takes care of the different
> input/output size and pixeltype, is it still required to implement
> the functions GenerateOutputInformation() and
> GenerateInputRequestedRegion() ?
> 
> - Am I correct by stating that if at least one of the (input/output)
> images has a different size than another one, these functions should be
> implemented?
> 
> 
> Many thanks for your help,
> Rashindra Manniesing.
> 
> 
> 
> 
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