[Insight-users] Image dimension problem on DeformableRegistrationxx.cxx

[Luis Ibanez]

Hi Jung,

The error message that you get is quite clear:

>> RecursiveGaussianImageFilter(02CA8B60): The number of pixels along 
>> direction 2 is less than 4. This filter requires a minimum of four 
>> pixels along the dimension to be processed."}" .


You are feeding this program with an image of dimensions:

                256  x  256 x  1

What the error message says is that you should use at least
an  image of dimensions

                256  x  256 x  4


If what you have is a single slice, then you shouldn't manage it
as a 3D image, because there is no appropriate way of computing
the derivatives in the 3rd dimension.


Why are you passing a single slice to a program that is intended
to compute deformable registration between two volumes ?


Please let us know,


   Thanks


      Luis


--------------------
Jung Tai Chen wrote:
> Hi,
>  
> I am trying to use DeformableRegistration6.cxx(B-spline) and 
> DeformableRegistration2.cxx(demons) in my application.
> The problem is that the above examples didn't work if I use itk::image 
> <float,3> to store a 2D image (256X256X1 with 1X1X1.5mm). The 
> DeformableRegistration2.cxx's pipeline didn't throw any exception but 
> the program still crashed.  The DeformableRegistration6.cxx throwed an 
> exception like this ""itk::ERROR: 
> RecursiveGaussianImageFilter(02CA8B60): The number of pixels along 
> direction 2 is less than 4. This filter requires a minimum of four 
> pixels along the dimension to be processed."}" .
> I can definitely sure that the image<>::xxxType::index, size, spacings 
> were stored correct information.
>  
> Can someone help me?
>  
> Many thanks.
> 
> 
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