Example: img_gauss_filtering_example

C++ example source code:

/* +------------------------------------------------------------------------+
   |                     Mobile Robot Programming Toolkit (MRPT)            |
   |                          https://www.mrpt.org/                         |
   |                                                                        |
   | Copyright (c) 2005-2021, Individual contributors, see AUTHORS file     |
   | See: https://www.mrpt.org/Authors - All rights reserved.               |
   | Released under BSD License. See: https://www.mrpt.org/License          |
   +------------------------------------------------------------------------+ */

#include <mrpt/gui/CDisplayWindow.h>
#include <mrpt/img/CImage.h>
#include <mrpt/system/CTicTac.h>

#include <iostream>

using namespace mrpt::gui;
using namespace mrpt::img;
using namespace mrpt::system;
using namespace std;

#include <mrpt/examples_config.h>
string myDataDir(
    MRPT_EXAMPLES_BASE_DIRECTORY + string("img_gauss_filtering_example/"));

// ------------------------------------------------------
//                  Test
// ------------------------------------------------------
void Test_GaussWindows()
{
    CTicTac tictac;
    CImage inImg, outImg;

    inImg.loadFromFile(myDataDir + "test_in.jpg");

    // Smoothed image:
    // ---------------------------
    tictac.Tic();

    inImg.filterGaussian(outImg, 11, 11);  // Window size

    printf("Smoothed image in %.03fms\n", 1000 * tictac.Tac());

    CDisplayWindow win1("Original Image");
    CDisplayWindow win2("Smoothed Image");

    win1.showImage(inImg);
    win2.showImage(outImg);

    mrpt::system::pause();
}

int main()
{
    try
    {
        Test_GaussWindows();
        return 0;
    }
    catch (const std::exception& e)
    {
        std::cout << "MRPT exception caught: " << e.what() << std::endl;
        return -1;
    }
    catch (...)
    {
        printf("Another exception!!");
        return -1;
    }
}