|
|
| (2 intermediate revisions by one other user not shown) |
| Line 1: |
Line 1: |
| ==AddNoiseToBinaryImage.cxx==
| | {{warning|1=The media wiki content on this page is no longer maintained. The examples presented on the https://itk.org/Wiki/* pages likely require ITK version 4.13 or earlier releases. In many cases, the examples on this page no longer conform to the best practices for modern ITK versions.}} |
| <source lang="cpp">
| |
| #include "itkImage.h"
| |
| #include "itkImageFileReader.h"
| |
| #include "itkImageRandomNonRepeatingIteratorWithIndex.h"
| |
| #include "itkImageFileWriter.h"
| |
| #include "itkMersenneTwisterRandomVariateGenerator.h"
| |
| | |
| int main (int argc, char *argv[])
| |
| {
| |
| if (argc < 3)
| |
| {
| |
| std::cerr << "Usage: " << argv[0]
| |
| << " inputFile outputFile [percent]" << std::endl;
| |
| return EXIT_FAILURE;
| |
| }
| |
| double percent = .1;
| |
| if (argc > 3)
| |
| {
| |
| percent = atof(argv[3]);
| |
| if (percent >= 1.0)
| |
| {
| |
| percent /= 100.0;
| |
| }
| |
| }
| |
| typedef itk::Image<unsigned char, 2> ImageType;
| |
| typedef itk::ImageFileReader<ImageType> ReaderType;
| |
| typedef itk::ImageRandomNonRepeatingIteratorWithIndex<ImageType> IteratorType;
| |
| typedef itk::ImageFileWriter<ImageType> WriterType;
| |
| | |
| // Read the binary file
| |
| ReaderType::Pointer reader = ReaderType::New();
| |
| reader->SetFileName( argv[1] );
| |
| reader->Update();
| |
| | |
| // At x% of the pixels, add a uniform random value between 0 and 255
| |
| IteratorType it(reader->GetOutput(),
| |
| reader->GetOutput()->GetLargestPossibleRegion());
| |
| it.SetNumberOfSamples(reader->GetOutput()->GetLargestPossibleRegion().GetNumberOfPixels() * percent);
| |
| std::cout << "Number of random samples: "
| |
| << it.GetNumberOfSamples() << std::endl;
| |
| typedef itk::Statistics::MersenneTwisterRandomVariateGenerator GeneratorType;
| |
| GeneratorType::Pointer random = GeneratorType::New();
| |
| | |
| it.GoToBegin();
| |
| while(!it.IsAtEnd()) | |
| {
| |
| it.Set(random->GetUniformVariate(0, 255));
| |
| ++it;
| |
| }
| |
| | |
| // Write the file
| |
| WriterType::Pointer writer = WriterType::New();
| |
| writer->SetFileName( argv[2] );
| |
| writer->SetInput(reader->GetOutput());
| |
| writer->SetFileName("foo.png");
| |
| writer->Update();
| |
| | |
| return EXIT_SUCCESS;
| |
| }
| |
| </source>
| |
| {{ITKCMakeLists|AddNoiseToBinaryImage}}
| |
