[Insight-users] Hints to create a known deformation image - Deformable Image registration?
Luis Ibanez
luis.ibanez at kitware.com
Sun Nov 1 18:56:30 EST 2009
Nick,
Thanks for pointing this out.
It is a much better option than my suggestion for using GIMP.
Thanks
Luis
----------------------------------------------------------------
On Sun, Nov 1, 2009 at 6:17 PM, Nicholas Tustison <ntustison at gmail.com> wrote:
> 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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