[vtkusers] vtkImageConvolve kernel size

[David Gobbi]

Hi John,

The limited kernel size question came up when the vtkImageConvolution
filter was first contributed to VTK.  Any patches to e.g. allow this
filter to take a vtkDataArray as the kernel would be welcome.

You can try the following alternative filters to see if an of them
meets your needs

vtkImageSeparableConvolution  -- efficient convolution if your kernel
    is separable
vtkImageCorrelation  -- takes two images as input, i.e. second image
    is the kernel
vtkImageFFT/vtkImageRFFT  -- probably not what you want, but it is
    another way to do convolution

  David


On Wed, Jul 21, 2010 at 5:43 AM, John Fraser <John.Fraser at icr.ac.uk> wrote:
> Hello,
>
> Does anyone know why vtkImageConvolve is not generic in the size of the
> kernel it supports and is it possible to extend it to support larger
> kernels?  I'm planning to perform convolution on a very small region of
> interest but with a larger kernel than 7x7x7.
>
> John
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