Reading-Gaussian Blurring-Writing

Overview

Introductory example which demonstrates the basics of reading, filtering, and writing an image. This examples works for any scalar or vector image type. It processes the image with a Gaussian blurring filter, which produces an image with floating point pixel type, then cast the output back to the input before writing the image to a file.

This example uses the object oriented (OO) interface to SimpleITK classes. The OO style produces more verbose code which clearly labels the parameters set by class member functions.

Code

C#C++JavaLuaPythonRRubyTcl

using System;
using itk.simple;

namespace itk.simple.examples {
    class SimpleGaussian {
        static void Main(string[] args) {
            try {
                if (args.Length < 3) {
                    Console.WriteLine("Usage: SimpleGaussian <input> <sigma> <output>");
                    return;
                }
                // Read input image
                ImageFileReader reader = new ImageFileReader();
                reader.SetFileName(args[0]);
                Image image = reader.Execute();

                // Execute Gaussian smoothing filter
                SmoothingRecursiveGaussianImageFilter gaussian = new SmoothingRecursiveGaussianImageFilter();
                gaussian.SetSigma(Double.Parse(args[1]));
                Image blurredImage = gaussian.Execute(image);
                
                // Covert the real output image back to the original pixel type , to
                // make writing easier , as many file formats don 't support real
                // pixels .
                CastImageFilter castFilter = new CastImageFilter();
                castFilter.SetOutputPixelType(image.GetPixelID());
                Image destImage = castFilter.Execute(blurredImage);

                // Write output image
                ImageFileWriter writer = new ImageFileWriter();
                writer.SetFileName(args[2]);
                writer.Execute(destImage);

            } catch (Exception ex) {
                Console.WriteLine(ex);
            }
        }
    }
}