1. 前言

比如原来是−1023−2034-1023-2034−1023−2034，现在需要调整到0−2550-2550−255

2. 代码

2.1 definition.h

#pragma once
#include<string>
#include<itkImage.h>constexpr unsigned int Dimension = 3;
using PixelType = double;
using ImageType = itk::Image<PixelType, Dimension>;
using ImageStyle = ImageType::Pointer;

2.2 RescaleIntensity.h

#pragma once
#include"definition.h"class RescalIntensity
{public:/// <summary>/// 读取nii图像/// </summary>/// <param name="file_path">文件路径</param>/// <param name="out_image">读到的图像</param>void read_nii(const std::string& file_path,ImageStyle& out_image);/// <summary>/// 写入nii文件/// </summary>/// <param name="input_image">输入图像</param>/// <param name="save_path">保存路径</param>void write_nii(const ImageStyle& input_image,const std::string& save_path);/// <summary>/// 重置像素值尺度/// </summary>/// <param name="input_image">输入(输出)图像</param>void resale_intensity(ImageStyle& input_image);
};

2.3 RescaleIntensity.cpp

#include "RescalIntensity.h"
#include<itkImageFileReader.h>
#include<itkNiftiImageIO.h>
#include<itkRescaleIntensityImageFilter.h>
#include<itkImageFileWriter.h>void RescalIntensity::read_nii(const std::string& file_path, ImageStyle& out_image)
{   using ReaderType = itk::ImageFileReader<ImageType>;auto reader = ReaderType::New();using ImageIOType = itk::NiftiImageIO;auto niiIO = ImageIOType::New();reader->SetImageIO(niiIO);reader->SetFileName(file_path);try {reader->Update();}catch (const itk::ExceptionObject& e) {std::cout << "error in reading nii" << std::endl;std::cout << e.what() << std::endl;}out_image = reader->GetOutput();
}void RescalIntensity::write_nii(const ImageStyle& input_image, const std::string& save_path)
{using WriterType = itk::ImageFileWriter<ImageType>;auto writer = WriterType::New();using ImageIOType = itk::NiftiImageIO;auto niiIO = ImageIOType::New();writer->SetImageIO(niiIO);writer->SetInput(input_image);writer->SetFileName(save_path);try {writer->Update();}catch (const itk::ExceptionObject& e) {std::cout << "error in writing nii" << std::endl;std::cout << e.what() << std::endl;}
}void RescalIntensity::resale_intensity(ImageStyle& input_image)
{using FilterType = itk::RescaleIntensityImageFilter<ImageType, ImageType>;auto filter = FilterType::New();filter->SetInput(input_image);filter->SetOutputMinimum(0);filter->SetOutputMaximum(255);try {filter->Update();}catch (const itk::ExceptionObject& e) {std::cout << "error in rescaling" << std::endl;std::cout << e.what() << std::endl;}input_image = filter->GetOutput();
}

2.4 main.cpp

#include<iostream>
#include"RescalIntensity.h"int main()
{using std::cout;using std::endl;RescalIntensity rescale_obj;ImageStyle input_image;rescale_obj.read_nii("D:/test/05150_2/05150_2.nii.gz",input_image);rescale_obj.resale_intensity(input_image);rescale_obj.write_nii(input_image, "res.nii.gz");return 0;
}

2.5 结果

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itk调整图像的像素值范围

1. 前言

2. 代码

2.1 definition.h

2.2 RescaleIntensity.h

2.3 RescaleIntensity.cpp

2.4 main.cpp

2.5 结果

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