[Insight-users] N-input filters

[Luis Ibanez]

Hi Kent,

You may want to take a look at the following filters:

http://www.itk.org/Insight/Doxygen/html/classitk_1_1NaryAddImageFilter.html
http://www.itk.org/Insight/Doxygen/html/classitk_1_1NaryFunctorImageFilter.html

They accept N inputs.

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There are also specialized versions for two inputs

http://www.itk.org/Insight/Doxygen/html/classitk_1_1BinaryFunctorImageFilter.html
http://www.itk.org/Insight/Doxygen/html/classitk_1_1AddImageFilter.html



and three inputs

http://www.itk.org/Insight/Doxygen/html/classitk_1_1TernaryAddImageFilter.html
http://www.itk.org/Insight/Doxygen/html/classitk_1_1TernaryFunctorImageFilter.html
http://www.itk.org/Insight/Doxygen/html/classitk_1_1TernaryMagnitudeImageFilter.html



In order to fuse 3 scalar images into an Image of vector with 3
compoents you may want to take a look at the JoinImageFilter
http://www.itk.org/Insight/Doxygen/html/classitk_1_1JoinImageFilter.html


You can also consider the use of ImageAdaptors
http://www.itk.org/Insight/Doxygen/html/group__ImageAdaptors.html
They allow to save memory at the expense of increasing the computing
time.



Regards,


     Luis


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Kent Williams wrote:
> Hi! I'm an insight-developer, but I'm posting to the users list because I 
> think this would be of interest to insight users as well:
> 
> Are there any examples of N-input filters? i.e. ITK filters that take more 
> than one input image?  The particular problem we're interested in is this: We 
> need to read in 3 images, and use them to generate an image where each 
> component is a 3 vector.
> 
> I've read the user manual chapters on writing filters, and done some code 
> spelunking through the online Doxygen documentation, without having the 
> lightbulb go off over my head.  Thanks in advance!
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