[Insight-users] Support for BiLinear and Bicubic Interploation types
Sharath Venkatesha
sharath20284 at yahoo.com
Wed Jul 8 19:50:03 EDT 2009
Hi Luis,
Thanks for the clarification on the bi-linear interpolation.
By bicubic, I mean extension of the cubic hermite spline method for interpolating points in a grid. In a simple implementation, I remember for bilinear we take the values of the neighbors and interpolate them; In bi-cubic, the value of the neighbours, and its second neighbors are also taken for interpolation, with a more complex equation to be solved, and hence finer interpolation.
The complexity is greater than bilinear and less than bspline.
Thanks,
Sharath
----- Original Message ----
From: Luis Ibanez <luis.ibanez at kitware.com>
To: Sharath Venkatesha <sharath20284 at yahoo.com>
Cc: Insight users <insight-users at itk.org>
Sent: Wednesday, July 8, 2009 2:33:18 PM
Subject: Re: [Insight-users] Support for BiLinear and Bicubic Interploation types
Hi Sharath,
(a) Yes, the BSplineInterpolateImageFunction can be used
along with any Transform. It use is not limited to
deformable registration by any means.
Note however, that is computationally more expensive
than the linear interpolator.
(b) The LinearInterpolator in ITK is N-Dimensional.
So, it will perform Bilinear interpolation in a 2D image
and it will perform Trilinear interpolation in a 3D image.
(c) What do you call a "Bicubic" type ?
Please clarify,
Thanks
Luis
---------------------------
Sharath Venkatesha wrote:
> Hi,
>
> I am currently using LinearInterpolationFunction filter, and want to use a better interpolation for registration. The manual says that the next option is BSplineInterpolateImageFunction.
>
> (a) Can BSplineInterpolateImageFunction be used with Rigid transformations? I have generally read that it is used with deformable transformations.
> (b) Is there a support for simpler Bilinear and Bicubic types?
>
> Thanks,
> Sharath
>
>
>
>
> _____________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the ITK FAQ at: http://www.itk.org/Wiki/ITK_FAQ
>
> Follow this link to subscribe/unsubscribe:
> http://www.itk.org/mailman/listinfo/insight-users
>
More information about the Insight-users
mailing list