ITK图像数据读写与显示

ITK图像数据读取：

1：设置图像数据类型例如常见的bmp、jpg、jpeg以及dicom、raw等

2：数据读取

下面的例子是在控制台下实现的png图像数据的读与写：

#include "itkRGBPixel.h"
#include "itkImage.h"
#include "itkImageFileReader.h"
#include "itkImageFileWriter.h"
#include "itkPNGImageIOFactory.h"
//ITK file reader and writer test
int main()
{
	// Verify the number of parameters in the command line


	// Software Guide : BeginLatex
	//
	// The \doxygen{RGBPixel} class is templated over the type used to
	// represent each one of the red, green and blue components. A typical
	// instantiation of the RGB image class might be as follows.
	//
	//  \index{itk::RGBPixel!Instantiation}
	//
	// Software Guide : EndLatex

	// Software Guide : BeginCodeSnippet
	typedef itk::RGBPixel< unsigned char >   PixelType;
	typedef itk::Image< PixelType, 2 >       ImageType;//set the type of pic
	// Software Guide : EndCodeSnippet


	// Software Guide : BeginLatex
	//
	// The image type is used as a template parameter to instantiate
	// the reader and writer.
	//
	// \index{itk::ImageFileReader!RGB Image}
	// \index{itk::ImageFileWriter!RGB Image}
	//
	// Software Guide : EndLatex

	// Software Guide : BeginCodeSnippet
	typedef itk::ImageFileReader< ImageType >  ReaderType;
	typedef itk::ImageFileWriter< ImageType >  WriterType;

	ReaderType::Pointer reader = ReaderType::New();
	WriterType::Pointer writer = WriterType::New();
	// Software Guide : EndCodeSnippet

	itk::PNGImageIOFactory::RegisterOneFactory();
//	const char * inputFilename = argv[1];
//	const char * outputFilename = argv[2];


	//  Software Guide : BeginLatex
	//
	//  The filenames of the input and output files must be provided to the
	//  reader and writer respectively.
	//
	//  Software Guide : EndLatex

	// Software Guide : BeginCodeSnippet
	reader->SetFileName("1.png");
	writer->SetFileName("2.png");
	// Software Guide : EndCodeSnippet


	ImageType::Pointer image = reader->GetOutput();
	writer->SetInput(image);


	//  Software Guide : BeginLatex
	//
	//  Finally, execution of the pipeline can be triggered by invoking the
	//  Update() method in the writer.
	//
	//  Software Guide : EndLatex

	// Software Guide : BeginCodeSnippet
	writer->Update();
	// Software Guide : EndCodeSnippet

	//  Software Guide : BeginLatex
	//
	//  You may have noticed that apart from the declaration of the
	//  \code{PixelType} there is nothing in this code specific to RGB
	//  images. All the actions required to support color images are implemented
	//  internally in the \doxygen{ImageIO} objects.
	//
	//  Software Guide : EndLatex


	return EXIT_SUCCESS;
}

ITK与VTK实现图像的显示：

用ITK 实现图像数据的读取，然后通过连接器把ITK读取的图像数据传输到VTK 然后进行显示；

下面是一个在console下实现的ITK与VTK混合编程实现图像的显示：

#include "itkImage.h"
#include "itkImageFileReader.h"
#include "itkImageToVTKImageFilter.h"
#include "itkPNGImageIOFactory.h"
#include "vtkImageViewer.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkAutoInit.h" 
VTK_MODULE_INIT(vtkRenderingOpenGL2); // VTK was built with vtkRenderingOpenGL2
VTK_MODULE_INIT(vtkInteractionStyle);
//ITK and VTK to show picture test
int main(int argc, char **argv)
{
	typedef itk::Image<unsigned char, 2> ImageType;//the type of pic
	typedef itk::ImageFileReader<ImageType> ReaderType;   //the class of read pic
	typedef itk::ImageToVTKImageFilter<ImageType> ConnectorType;  //connenct itk and vtk

	ReaderType::Pointer reader = ReaderType::New();
	ConnectorType::Pointer connector = ConnectorType::New();
	reader->SetFileName("1.png");

	itk::PNGImageIOFactory::RegisterOneFactory();

	connector->SetInput(reader->GetOutput());
	connector->Update();

	vtkImageViewer *viewer = vtkImageViewer::New();
	vtkRenderWindowInteractor *interactor = vtkRenderWindowInteractor::New();
	viewer->SetInputData(connector->GetOutput());
	viewer->SetupInteractor(interactor);
	viewer->GetRenderWindow()->SetSize(500, 500);//set window size
	viewer->SetColorWindow(255); //set window color
	viewer->SetColorLevel(128);   //set the level of window
	viewer->Render();
	
	interactor->Initialize();
	interactor->Start();
	return EXIT_SUCCESS;
}