[Insight-users] Hints to create a known deformation image - Deformable Image registration?

[Nicholas Tustison]

Hi Luis, Motes,

Another possibility you might want to consider

http://public.kitware.com/Insight/Doxygen/html/classitk_1_1GridImageSource.html

Nick


On Nov 1, 2009, at 6:06 PM, Luis Ibanez wrote:

> Hi Motes,
>
> 1) Lena is certainly not the best motif for evaluating a deformable
>     registration process. You may want to use a grid image with
>     about four time the density of lines of the BSpline grid, and
>     lines that are more than 2 pixels apart.
>
>     The reason why you want lines to be more than 2 pixels apart
>     is to avoid aliasing when you resample the image using the
>     deformation field.
>
> 2) You could create such image by using GIMP
>
>       a) Open Gimp
>       b) create a new image,
>       c) Select Filters --> Render--> Pattern --> Grid
>       d) save the image
>
>
> 3)  Yes, you can make more detailed initial deformation...
>       but you have to initialize all the coefficients.
>
>       It may be desirable to generate those initial numbers
>        from a program...
>
>
>    Regards,
>
>
>          Luis
>
>
> --------------------------------------------------------------------
>
> On Fri, Oct 30, 2009 at 2:25 PM, motes motes <mort.motes at gmail.com>  
> wrote:
>> I would like to test my BSplineDeformable registration method with a
>> known deformation field. Currently I apply the BSplineWarping1.cxx
>> example to the fixed image and use the output as the moving image. As
>> input image I use lena:
>>
>> http://stochastix.files.wordpress.com/2008/07/lena-sjooblom.jpg
>>
>> But are there better motives that illustrate the deformation better
>> (like a chess board, salt/pebber image etc)?
>>
>> And is it possible to create a more detailed know deformation instead
>> of only changing the 8*8 deformation vectors in the text input file  
>> to
>> the warper?
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