C++ ITK 读写.mha 文件

如题：

#include <iostream>
#include <string>
#include <itkImage.h>
#include <itkImageFileReader.h>
#include <itkImageIOFactory.h>
#include<itkMetaImageIOFactory.h>
#include<itkImageFileWriter.h>

int main()
{
    // 注册.mha文件IO
    //itk::ImageIOBase::RegisterDefaultIOFactory();
    itk::MetaImageIOFactory::RegisterOneFactory();
    // 定义图像类型
    typedef itk::Image<unsigned char, 3> ImageType;

    // 创建图像读取器
    typedef itk::ImageFileReader<ImageType> ReaderType;
    ReaderType::Pointer reader = ReaderType::New();
    reader->SetFileName(".\0.mha");

    // 读取图像
    try
    {
        reader->Update();

        // 获取图像信息
        ImageType::Pointer image = reader->GetOutput();
        ImageType::SizeType size = image->GetLargestPossibleRegion().GetSize();
        ImageType::SpacingType spacing = image->GetSpacing();

        // 输出图像信息
        std::cout << "Image size: " << size << std::endl;
        std::cout << "Image spacing: " << spacing << std::endl;

        typedef itk::ImageFileWriter<ImageType> FileWriterType;
        FileWriterType::Pointer w = FileWriterType::New();
        w->SetFileName(".\1.mha");
        w->SetInput(image);
        w->Update();

    }
    catch (itk::ExceptionObject& ex)
    {
        std::cerr << "Exception caught: " << ex << std::endl;
        return EXIT_FAILURE;
    }

    return EXIT_SUCCESS;
}