[Insight-users] ITK 4.1 ImageIOFactory Could not create IO Object

[Bradley Lowekamp]

Most likely this is a problem with how you are using CMake for ITK and is not related to the code you have included here.

There is an example of what a basic CMake project which uses ITK should like like  int ITK/Examples/Installation/CMakeLists.txt

http://itk.org/gitweb?p=ITK.git;a=blob;f=Examples/Installation/CMakeLists.txt;h=5e1b9e7ae0a95430f5162e8ff435b98570c5ad6e;hb=HEAD

Hopefully, this will get you started in the right direction to solve you problem.

Brad


On May 22, 2012, at 4:35 AM, Sebastian Losch wrote:

> Hi!
> 
> I am having problems getting the ImageFileReader and ImageFileWriter to work. I just want to read a PNG File, apply a filter and write it back to the harddrive. I found out that there is a problem in 4.1 with the ImageIOFactory registration, so i register the PNGFactory manually. The .png file is in the same folder as the executable. Here is my Code:
> 
> #include "itkImage.h"
> #include "itkImageFileReader.h"
> #include "itkImageFileWriter.h"
> #include "itkCannyEdgeDetectionImageFilter.h"
> #include "itkObjectFactoryBase.h"
> #include "itkPNGImageIOFactory.h"
> 
> int main(int argc, char *argv[])
> {
> 	itk::ObjectFactoryBase::RegisterFactory(itk::PNGImageIOFactory::New());
> 
> 
> 	double variance = 2.0;
> 	double upperThreshold = 0.0;
> 	double lowerThreshold = 0.0;
> 
> 	typedef itk::Image<double, 2>  DoubleImageType;
> 
> 	typedef itk::ImageFileReader<DoubleImageType> ReaderType;
> 	ReaderType::Pointer reader = ReaderType::New();
> 	reader->SetFileName("input.png");
> 
> 	typedef itk::CannyEdgeDetectionImageFilter <DoubleImageType, DoubleImageType>
> 		CannyEdgeDetectionImageFilterType;
> 
> 	CannyEdgeDetectionImageFilterType::Pointer cannyFilter = CannyEdgeDetectionImageFilterType::New();
> 	cannyFilter->SetInput(reader->GetOutput());
> 	cannyFilter->SetVariance( variance );
> 	cannyFilter->SetUpperThreshold( upperThreshold );
> 	cannyFilter->SetLowerThreshold( lowerThreshold );
> 
> 	typedef itk::ImageFileWriter<DoubleImageType> WriterType;
> 	WriterType::Pointer writer = WriterType::New();
> 
> 	writer->SetFileName("test.png");
> 	writer->SetInput(cannyFilter->GetOutput());
> 
> 	try {
> 		writer->Update();
> 	} catch (itk::ExceptionObject &e) {
> 		std::cerr << e << std::endl;
> 	}
> 
> 	std::cout << "ENDE" << std::endl;
> }
> 
> and this is the error:
> 
> itk::ImageFileReaderException (0059E4A8)
> Location: "void __thiscall itk::ImageFileReader<class itk::Image<double,2>,class itk::DefaultConvertPixelTraits<double> >::GenerateOutputInformation(void)"
> File: c:\libs\itk\include\itk-4.1\itkimagefilereader.hxx
> Line: 143
> Description:  Could not create IO object for file input.png
>   Tried to create one of the following:
>     PNGImageIO
>   You probably failed to set a file suffix, or
>     set the suffix to an unsupported type.
> 
> 
> What am i doing wrong?
> 
> Thanks in advance, Sebastian
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========================================================
Bradley Lowekamp  
Medical Science and Computing for
Office of High Performance Computing and Communications
National Library of Medicine 
blowekamp at mail.nih.gov



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