[ITK Community] [Insight-developers] What triggers instantiation of all ImageIO libraries?

[Bradley Lowekamp]

Kent,

If you explicitly don't use the implicit ITK auto registration by defining ITK_NO_IO_FACTORY_REGISTER_MANAGER to true[1], before including "ITK_USE_FILE" in cmake, your factories don't get registered.

Look for a files called itkImageIOFactoryRegisterManager.h  and itkTransformIOFactoryRegisterManager.h in a directory called ITKIOFactoryRegistration in build trees that use ITK.

These file are automatically generated based on the ITK IO modules turned on. Some times you can just copy that file and use it. Otherwise there is some funny cmake stuff will need to be done.

It also may be easiest to just call YourImageIOFactor::RegisterOnFactory(), if you just need a couple know one registered.


[1] https://github.com/SimpleITK/SimpleITK/blob/master/Code/BasicFilters/src/CMakeLists.txt#L11

On Nov 21, 2013, at 1:56 PM, "Williams, Norman K" <norman-k-williams at uiowa.edu> wrote:

> I'm in the process of using ITK in a C++ MEX Matlab extension.
> 
> I solved the linking issues, but I ran into an interesting problem:  When
> the MEX extension gets called, the ImageIOFactory instances have not yet
> been registered. Is there a function I need to call before I use ImageIO?
> 
> --
> Kent Williams norman-k-williams at uiowa.edu
> 
> 
> 
> 
> 
> 
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