|
|
| Line 1: |
Line 1: |
| <div class="floatcenter">[[File:ITK_Examples_Baseline_ImageProcessing_TestSigmoidImageFilter.png]]</div>
| | {{warning|1=The media wiki content on this page is no longer maintained.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. |
| This example passes every pixel in an image through a Sigmoid function. The output displays the input image and the filtered image.
| | }} |
|
| |
|
| Please see the ITK Software Guide for a qualitative description of how Alpha and Beta affect the filter.
| | [https://itk.org/ITKExamples[ITK Sphinx Examples]] |
| | |
| ==SigmoidImageFilter.cxx==
| |
| <source lang="cpp">
| |
| #include "itkImage.h"
| |
| #include "itkImageFileReader.h"
| |
| #include "itkSigmoidImageFilter.h"
| |
| | |
| #include "QuickView.h"
| |
| | |
| int main(int argc, char *argv[])
| |
| {
| |
| if(argc < 2)
| |
| {
| |
| std::cerr << "Usage: ";
| |
| std::cerr << argv[0] << " inputImageFile [alpha] [beta]" << std::endl;
| |
| return EXIT_FAILURE;
| |
| }
| |
| | |
| double alpha = 5.0;
| |
| double beta = 10.0;
| |
| if (argc > 2)
| |
| {
| |
| alpha = atof(argv[2]);
| |
| }
| |
| if (argc > 3)
| |
| {
| |
| beta = atof(argv[3]);
| |
| }
| |
| | |
| typedef itk::Image<unsigned char, 2> ImageType;
| |
| typedef itk::ImageFileReader<ImageType> ReaderType;
| |
| | |
| ReaderType::Pointer reader = ReaderType::New();
| |
| reader->SetFileName(argv[1]);
| |
| | |
| typedef itk::SigmoidImageFilter <ImageType, ImageType>
| |
| SigmoidImageFilterType;
| |
| | |
| SigmoidImageFilterType::Pointer sigmoidFilter
| |
| = SigmoidImageFilterType::New();
| |
| sigmoidFilter->SetInput(reader->GetOutput());
| |
| sigmoidFilter->SetOutputMinimum(0);
| |
| sigmoidFilter->SetOutputMaximum(255);
| |
| sigmoidFilter->SetAlpha(alpha);
| |
| sigmoidFilter->SetBeta(beta);
| |
|
| |
| QuickView viewer;
| |
| viewer.AddImage(
| |
| reader->GetOutput(),true,
| |
| itksys::SystemTools::GetFilenameName(argv[1]));
| |
| | |
| std::stringstream desc;
| |
| desc << "SigmoidImageFilter\nalpha = " << alpha
| |
| << " beta = " << beta;
| |
| viewer.AddImage(
| |
| sigmoidFilter->GetOutput(),
| |
| true,
| |
| desc.str());
| |
| | |
| viewer.Visualize();
| |
| | |
| return EXIT_SUCCESS;
| |
| }
| |
| </source>
| |
| | |
| {{ITKVTKCMakeLists|{{SUBPAGENAME}}}}
| |
