[Insight-users] changing image orientation

[Patrik Brynolfsson]

I have used this filter before, but I always wondered why you have to use a
filter to change properties like orientation, origin and spacing, especially
when there are methods for changing them in the image object itself. Can
someone perhaps clear this up for me?
Thanks!

2009/9/24 Luis Ibanez <luis.ibanez at kitware.com>

>
> Hi Shoosh,
>
>  This is not the correct way of modifying the orientation of an image.
>
>
> In general you should never attempt to change the content of an image
> that is the output of a filter or a reader.
>
> The correct way of changin the orientation of an image is to use the
>
>
>    itkChangeInformationFilter
>
>
> http://www.itk.org/Insight/Doxygen/html/classitk_1_1ChangeInformationImageFilter.html
>
> Call on it
>
>   ChangeDirectionOn()
>
> and
>
>    SetOutputDirection( newdirection)
>
>
>
>   Regards,
>
>
>
>        Luis
>
>
>
>
> -----------------------
> shoosh moosh wrote:
>
>> How do I change the orientation of a 3D image.  This is the code segment I
>> have but I get the following error:
>>
>> std::cout<< "Direction is " << reader1->GetOutput()->GetDirection()
>> <<std::endl ;
>> reader1->GetOutput()->SetDirection(0, {1,0,0} );
>> reader1->GetOutput()->SetDirection(1, {0,-1,0} );
>> reader1->GetOutput()->SetDirection(2, {0,-1,0} );
>> std::cout<< "New direction is " << reader1->GetOutput()->GetDirection()
>> <<std::endl ;
>>
>>
>> [100%] Building CXX object CMakeFiles/rsf.dir/rsf.o
>> /home/shoosh/Desktop/CSF/rsf/rsf.cxx: In function ‘int main(int, char**)’:
>> /home/shoosh/Desktop/CSF/rsf/rsf.cxx:105: error: expected
>> primary-expression before ‘{’ token
>> /home/shoosh/Desktop/CSF/rsf/rsf.cxx:106: error: expected
>> primary-expression before ‘{’ token
>> /home/shoosh/Desktop/CSF/rsf/rsf.cxx:107: error: expected
>> primary-expression before ‘{’ token
>> make[2]: *** [CMakeFiles/rsf.dir/rsf. o] Error 1
>> make[1]: *** [CMakeFiles/rsf.dir/all] Error 2
>> make: *** [all] Error 2
>>
>>
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-- 
Patrik Brynolfsson
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