[Insight-users] Rigid registration with translation restricted to single axis?

[g c]

Hi Luis,

Thanks for your suggestions, I have tried your option A)

One additional thing I needed to change was

virtual unsigned int GetNumberOfParameters(void) const
    { return NDimensions; }

into

virtual unsigned int GetNumberOfParameters(void) const
    { return ParametersDimension; }



Also, I'm wondering about

SetParameters

and

GetParameters

where I changed the loops from

for( unsigned int i=0; i<SpaceDimension; i++ )

into

for( unsigned int i=0; i<ParametersDimension; i++ )

Would that be correct?



thanks again,

George


On 24 May 2010 16:23, Luis Ibanez <luis.ibanez at kitware.com> wrote:
> Hi George,
>
> You are correct.
> This is fairly easy to accomplish.
>
> The main two options are:
>
> A) Write a customized Transform class.
>
> B) Use the Scaling parameters of the optimizer.
>    along with a standard Translation Transform.
>
>
> Option (B) will mostly "discourage" the optimizer
> from moving along one of the axis. So, if you really
> want to enforce a single axis movement, then
> option (A) is your best bet.
>
>
> You basically has to copy/paste the current
> itkTranslationTransform class into a new one
>
> and modify:
>
> 0)    Make this new transform derive from itkTranslationTransform
>
> 1)    itkStaticConstMacro(ParametersDimension, unsigned int, NDimensions);
>       to be
>       itkStaticConstMacro(ParametersDimension, unsigned int, 1 );
>
> 2)   Overload the methods
>
>      SetParameters()
>      GetParameters()
>      GetJacobian()
>
>
>
>
>   Regards
>
>
>        Luis
>
>
> -------------------------------------------------------------------
> On Mon, May 24, 2010 at 7:53 AM, g c <gc12358 at googlemail.com> wrote:
>> Hi,
>>
>> I would like to rigidly register two 2D images, where the translation
>> should be restricted to a single axis (say the x-axis). I suppose this
>> should be fairly straightforward, perhaps by modifying the
>> itk::TranslationTransform class? Has anyone already done this before?
>> Any suggestion appreciated.
>>
>> Best regards,
>>
>> George
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