ITK:创建具有相关类ID的样本列表
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该文本展示了如何使用ITK库（Insight Segmentation and Registration Toolkit）在C++中创建一个具有相关类ID的样本列表，并通过测量向量、频率和类标签进行分类。具体步骤包括：
导入必要的头文件：itkListSample.h、itkMembershipSample.h 和 itkVector.h。
定义测量向量类型：使用浮点数3维向量。
定义样本类型：基于测量向量类型的统计学列表样本来定义。
初始化并填充样本：通过PushBack方法将测量向量添加到样本中。
设置分类器：定义2个类别，并将实例分配到相应的类别中。
遍历并输出结果：通过迭代器遍历每个实例，并打印其标识符、测量向量、频率和类标签。
进一步分析类别：对每个类别单独遍历并打印相关信息。
该示例展示了如何利用ITK库进行图像分析中的实例识别任务，并提供了完整的代码实现及其输出结果的可视化方法。
ITK:创建具有相关类ID的样本列表
- 内容提要
- 输出结果
- C++实现代码
内容提要
创建具有相关类ID的样本列表。
输出结果
instance identifier = 0 measurement vector = [1, 2, 4] frequency = 1 class label = 0
instance identifier = 1 measurement vector = [2, 4, 5] frequency = 1 class label = 0
instance identifier = 2 measurement vector = [3, 8, 6] frequency = 1 class label = 1
instance identifier = 0 measurement vector = [1, 2, 4] frequency = 1
instance identifier = 1 measurement vector = [2, 4, 5] frequency = 1C++实现代码
#include "itkListSample.h"
#include "itkMembershipSample.h"
#include "itkVector.h"
int main(int, char *[])
{
using MeasurementVectorType = itk::Vector<float, 3>;
using SampleType = itk::Statistics::ListSample<MeasurementVectorType>;
SampleType::Pointer sample = SampleType::New();
MeasurementVectorType mv;
mv[0] = 1.0;
mv[1] = 2.0;
mv[2] = 4.0;
sample->PushBack(mv);
mv[0] = 2.0;
mv[1] = 4.0;
mv[2] = 5.0;
sample->PushBack(mv);
mv[0] = 3.0;
mv[1] = 8.0;
mv[2] = 6.0;
sample->PushBack(mv);
using MembershipSampleType = itk::Statistics::MembershipSample<SampleType>;
MembershipSampleType::Pointer membershipSample = MembershipSampleType::New();
membershipSample->SetSample(sample);
membershipSample->SetNumberOfClasses(2);
membershipSample->AddInstance(0U, 0UL);
membershipSample->AddInstance(0U, 1UL);
membershipSample->AddInstance(1U, 2UL);
MembershipSampleType::ConstIterator iter = membershipSample->Begin();
while (iter != membershipSample->End())
{
std::cout << "instance identifier = " << iter.GetInstanceIdentifier()
<< "\t measurement vector = " << iter.GetMeasurementVector() << "\t frequency = " << iter.GetFrequency()
<< "\t class label = " << iter.GetClassLabel() << std::endl;
++iter;
}
MembershipSampleType::ClassSampleType::ConstPointer classSample = membershipSample->GetClassSample(0);
MembershipSampleType::ClassSampleType::ConstIterator c_iter = classSample->Begin();
while (c_iter != classSample->End())
{
std::cout << "instance identifier = " << c_iter.GetInstanceIdentifier()
<< "\t measurement vector = " << c_iter.GetMeasurementVector()
<< "\t frequency = " << c_iter.GetFrequency() << std::endl;
++c_iter;
}
return EXIT_SUCCESS;
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