[Insight-users] Guidelines for Bspline mesh sizes.

[Tim Allman]

Thanks Matt. Just what I needed to know.

Tim

On 14-02-04 11:06 AM, Matt McCormick wrote:
> Hi Tim,
>
> Some guidelines can be found here:
>
>    http://slicer.org/slicerWiki/index.php/FAQ#What.27s_the_BSpline_Grid_Size.3F
>
> Yes, in general, the number of grid points is not too dependent on the
> pixel density.  However, if there are only a few slices in the third
> direction, for example, then the grid should be much more sparse.  An
> overly dense grid will overfit the motion, but if there are
> insufficient voxels, the motion may be undersampled.  Increasing the
> grid density in a multi-resolution scheme is a good approach.
>
> HTH,
> Matt
>
> On Tue, Feb 4, 2014 at 9:37 AM, Tim Allman <dr.tim.allman at gmail.com> wrote:
>> The examples, tests and ITK Software Guide have little to say about the size
>> of the Bspline mesh to use in deformable registration and the literature
>> seems to be all over the place. In general, for a 2D registration the number
>> of nodes in each dimension is usually the same even if the number of pixels
>> or voxels in each dimension is quite different.
>>
>> Does anyone have any comments about a rational way to set up the mesh? I
>> would like especially some guidance with multilevel registrations and 3D
>> registrations of images with only a few slices.
>>
>> Thanks,
>>
>> Tim
>>
>> --
>> Tim Allman, Ph.D.
>> 35 Margaret Street,
>> Guelph Ontario N1E 5R6
>> Canada
>>
>>
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> _____________________________________
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>
> Visit other Kitware open-source projects at
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> http://www.kitware.com/products/protraining.php
>
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-- 
Tim Allman, Ph.D.
35 Margaret Street,
Guelph Ontario N1E 5R6
Canada

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