testImageResize.cpp

Test image resize.

/****************************************************************************
 *
 * This file is part of the ViSP software.
 * Copyright (C) 2005 - 2017 by Inria. All rights reserved.
 *
 * This software is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * ("GPL") version 2 as published by the Free Software Foundation.
 * See the file LICENSE.txt at the root directory of this source
 * distribution for additional information about the GNU GPL.
 *
 * For using ViSP with software that can not be combined with the GNU
 * GPL, please contact Inria about acquiring a ViSP Professional
 * Edition License.
 *
 * See http://visp.inria.fr for more information.
 *
 * This software was developed at:
 * Inria Rennes - Bretagne Atlantique
 * Campus Universitaire de Beaulieu
 * 35042 Rennes Cedex
 * France
 *
 * If you have questions regarding the use of this file, please contact
 * Inria at visp@inria.fr
 *
 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 * Description:
 * Test image resize.
 *
 *****************************************************************************/

#include <visp3/core/vpImage.h>
#include <visp3/core/vpDisplay.h>
#include <visp3/io/vpImageIo.h>
#include <visp3/core/vpImageTools.h>
#include <visp3/core/vpIoTools.h>
#include <visp3/io/vpParseArgv.h>

#include <visp3/gui/vpDisplayOpenCV.h>
#include <visp3/gui/vpDisplayGTK.h>
#include <visp3/gui/vpDisplayX.h>
#include <visp3/gui/vpDisplayGDI.h>
#include <visp3/gui/vpDisplayD3D.h>

// List of allowed command line options
#define GETOPTARGS "cdi:W:H:m:h"


namespace {
  /*
    Print the program options.

    \param name : Program name.
    \param badparam : Bad parameter name.
    \param ipath: Input image path.
    \param w : Resize width.
    \param h : Resize height.
    \param m : Resize interpolation method.
   */
  void usage(const char *name, const char *badparam, std::string ipath, unsigned int &w, unsigned int &h, int &m)
  {
    fprintf(stdout, "\n\
  Test image resize.\n\
  \n\
  SYNOPSIS\n\
    %s [-i <input image path>] [-W <width>] [-H <height>] [-m <method>] [-c] [-d]\n\
       [-h]\n                 \
  ", name);

    fprintf(stdout, "\n\
  OPTIONS:                                               Default\n\
    -i <input image path>                                %s\n\
       Set image input path.\n\
       From this path read \"ViSP-images/Klimt/Klimt.pgm\"\n\
       image.\n\
       Setting the VISP_INPUT_IMAGE_PATH environment\n\
       variable produces the same behaviour than using\n\
       this option.\n\
  \n\
    -W <width>                                   %d\n\
       Set the new image width.\n\
  \n\
    -H <height>                                   %d\n\
       Set the new image height.\n\
  \n\
    -m <method>                                   %d\n\
       Set resize interpolation method.\n\
  \n\
    -c                                   \n\
       Disable mouse click.\n\
  \n\
    -d                                   \n\
       Disable image display.\n\
  \n\
    -h\n\
       Print the help.\n\n",
      ipath.c_str(), w, h, m);

    if (badparam)
      fprintf(stdout, "\nERROR: Bad parameter [%s]\n", badparam);
  }

  bool getOptions(int argc, const char **argv, std::string &ipath, unsigned int &w, unsigned int &h, int &method,
                  bool &opt_display, bool &opt_click)
  {
    const char *optarg_;
    int c;
    while ((c = vpParseArgv::parse(argc, argv, GETOPTARGS, &optarg_)) > 1) {

      switch (c) {
      case 'i': ipath = optarg_; break;
      case 'W': w = (unsigned int) atoi(optarg_); break;
      case 'H': h = (unsigned int) atoi(optarg_); break;
      case 'm': method = atoi(optarg_); break;
      case 'h': usage(argv[0], NULL, ipath, w, h, method); return false; break;

      case 'c': opt_click = false; break;
      case 'd': opt_display = false; break;
        break;

      default:
        usage(argv[0], optarg_, ipath, w, h, method); return false; break;
      }
    }

    if ((c == 1) || (c == -1)) {
      // standalone param or error
      usage(argv[0], NULL, ipath, w, h, method);
      std::cerr << "ERROR: " << std::endl;
      std::cerr << "  Bad argument " << optarg_ << std::endl << std::endl;
      return false;
    }

    return true;
  }
}

int
main(int argc, const char ** argv)
{
  try {
    std::string env_ipath;
    std::string opt_ipath;
    std::string ipath;
    std::string filename;
    unsigned int width = 101;
    unsigned int height = 207;
    int method = 0;
    bool opt_display = true;
    bool opt_click = true;

    // Get the visp-images-data package path or VISP_INPUT_IMAGE_PATH environment variable value
    env_ipath = vpIoTools::getViSPImagesDataPath();

    // Set the default input path
    if (! env_ipath.empty())
      ipath = env_ipath;

    // Read the command line options
    if (getOptions(argc, argv, opt_ipath, width, height, method, opt_display, opt_click) == false) {
      exit (EXIT_FAILURE);
    }

    // Get the option values
    if (!opt_ipath.empty())
      ipath = opt_ipath;

    // Compare ipath and env_ipath. If they differ, we take into account
    // the input path comming from the command line option
    if (opt_ipath.empty()) {
      if (ipath != env_ipath) {
        std::cout << std::endl
                  << "WARNING: " << std::endl;
        std::cout << "  Since -i <visp image path=" << ipath << "> "
                  << "  is different from VISP_IMAGE_PATH=" << env_ipath << std::endl
                  << "  we skip the environment variable." << std::endl;
      }
    }

    // Test if an input path is set
    if (opt_ipath.empty() && env_ipath.empty()){
      usage(argv[0], NULL, ipath, width, height, method);
      std::cerr << std::endl
                << "ERROR:" << std::endl;
      std::cerr << "  Use -i <visp image path> option or set VISP_INPUT_IMAGE_PATH "
                << std::endl
                << "  environment variable to specify the location of the " << std::endl
                << "  image path where test images are located." << std::endl << std::endl;
      exit(EXIT_FAILURE);
    }

    //
    // Here starts really the test
    //
    for (int m = 0; m < 3; m++) {
      std::cout << "Interpolation method: " << m << std::endl;

      vpImage<unsigned char> Itest(3,4);
      for (unsigned int cpt = 0; cpt < Itest.getSize(); cpt++) {
        Itest.bitmap[cpt] = cpt;
      }
      vpImage<unsigned char> Itest_resize(Itest.getHeight()*2, Itest.getWidth()*2), Itest_resize2(Itest.getHeight(), Itest.getWidth());
      vpImageTools::resize(Itest, Itest_resize, (vpImageTools::vpImageInterpolationType) m);
      vpImageTools::resize(Itest_resize, Itest_resize2, (vpImageTools::vpImageInterpolationType) m);
      std::cout << "Itest:\n" << Itest << std::endl;
      std::cout << "Itest_resize:\n" << Itest_resize << std::endl;
      std::cout << "Itest_resize2:\n" << Itest_resize2 << std::endl;
      std::cout << "(Itest ==Itest_resize2)? " << (Itest == Itest_resize2) << std::endl;

      Itest.resize(4,4);
      for (unsigned int cpt = 0; cpt < Itest.getSize(); cpt++) {
        Itest.bitmap[cpt] = cpt;
      }
      vpImageTools::resize(Itest, Itest_resize, Itest.getWidth()/2, Itest.getHeight()/2, (vpImageTools::vpImageInterpolationType) m);
      vpImageTools::resize(Itest_resize, Itest_resize2, Itest.getWidth(), Itest.getHeight(), (vpImageTools::vpImageInterpolationType) m);
      std::cout << "\nItest:\n" << Itest << std::endl;
      std::cout << "Itest_resize:\n" << Itest_resize << std::endl;
      std::cout << "Itest_resize2:\n" << Itest_resize2 << std::endl;
      std::cout << "(Itest ==Itest_resize2)? " << (Itest == Itest_resize2) << std::endl << std::endl;
    }

    //Grayscale image
    vpImage<unsigned char> I; // Input image

    // Read the input grey image from the disk
    filename = vpIoTools::createFilePath(ipath, "ViSP-images/Klimt/Klimt.pgm");
    std::cout << "Read image: " << filename << std::endl;
    vpImageIo::read(I, filename);

    vpImage<unsigned char> I_resize;
    double t = vpTime::measureTimeMs();
    vpImageTools::resize(I, I_resize, width, height, (vpImageTools::vpImageInterpolationType) method);
    t = vpTime::measureTimeMs() - t;
    std::cout << "Time to resize from " << I.getWidth() << "x" << I.getHeight() << " to " << width << "x" << height << ": " << t << " ms" << std::endl;

#if defined (VISP_HAVE_X11)
    vpDisplayX *d1 = new vpDisplayX, *d2 = new vpDisplayX;
#elif defined (VISP_HAVE_OPENCV)
    vpDisplayOpenCV *d1 = new vpDisplayOpenCV, *d2 = new vpDisplayOpenCV;
#elif defined (VISP_HAVE_GTK)
    vpDisplayGTK *d1 = new vpDisplayGTK, *d2 = new vpDisplayGTK;
#elif defined (VISP_HAVE_GDI)
    vpDisplayGDI *d1 = new vpDisplayGDI, *d2 = new vpDisplayGDI;
#elif defined (VISP_HAVE_D3D9)
    vpDisplayD3D *d1 = new vpDisplayD3D, *d2 = new vpDisplayD3D;
#else
    std::cerr << "No display available!" << std::endl;
    opt_display = false;
#endif

    if (opt_display) {
#if defined (VISP_HAVE_X11) || defined (VISP_HAVE_OPENCV) || defined (VISP_HAVE_GTK) || defined (VISP_HAVE_GDI) || defined (VISP_HAVE_D3D9)
      d1->init(I, 0, 0, "Grayscale image");
      d2->init(I_resize, (int) I.getWidth()+80, 0, "Grayscale image resized");
#endif

      vpDisplay::display(I);
      vpDisplay::display(I_resize);
      vpDisplay::displayText(I_resize, 20, 20, "Click to continue.", vpColor::red);
      vpDisplay::flush(I);
      vpDisplay::flush(I_resize);

      if (opt_click) {
        vpDisplay::getClick(I_resize);
      }
    }


    //Color image
    vpImage<vpRGBa> I_color; // Input image

    // Read the input grey image from the disk
    filename = vpIoTools::createFilePath(ipath, "ViSP-images/Klimt/Klimt.ppm");
    std::cout << "\nRead image: " << filename << std::endl;
    vpImageIo::read(I_color, filename);

    vpImage<vpRGBa> I_color_resize;
    t = vpTime::measureTimeMs();
    vpImageTools::resize(I_color, I_color_resize, width, height, (vpImageTools::vpImageInterpolationType) method);
    t = vpTime::measureTimeMs() - t;
    std::cout << "Time to resize from " << I_color.getWidth() << "x" << I_color.getHeight() << " to " << width << "x" << height << ": " << t << " ms" << std::endl;

#if defined (VISP_HAVE_X11)
    vpDisplayX *d3 = new vpDisplayX, *d4 = new vpDisplayX;
#elif defined (VISP_HAVE_OPENCV)
    vpDisplayOpenCV *d3 = new vpDisplayOpenCV, *d4 = new vpDisplayOpenCV;
#elif defined (VISP_HAVE_GTK)
    vpDisplayGTK *d3 = new vpDisplayGTK, *d4 = new vpDisplayGTK;
#elif defined (VISP_HAVE_GDI)
    vpDisplayGDI *d3 = new vpDisplayGDI, *d4 = new vpDisplayGDI;
#elif defined (VISP_HAVE_D3D9)
    vpDisplayD3D *d3 = new vpDisplayD3D, *d4 = new vpDisplayD3D;
#else
    std::cerr << "No display available!" << std::endl;
    opt_display = false;
#endif

    if (opt_display) {
#if defined (VISP_HAVE_X11) || defined (VISP_HAVE_OPENCV) || defined (VISP_HAVE_GTK) || defined (VISP_HAVE_GDI) || defined (VISP_HAVE_D3D9)
      d3->init(I_color, 0, 0, "Color image");
      d4->init(I_color_resize, (int) I_color.getWidth()+80, 0, "Color image resized");
#endif

      vpDisplay::display(I_color);
      vpDisplay::display(I_color_resize);
      vpDisplay::displayText(I_color_resize, 20, 20, "Click to quit.", vpColor::red);
      vpDisplay::flush(I_color);
      vpDisplay::flush(I_color_resize);
      if (opt_click) {
        vpDisplay::getClick(I_color_resize);
      }
    }


#if defined (VISP_HAVE_X11) || defined (VISP_HAVE_OPENCV) || defined (VISP_HAVE_GTK) || defined (VISP_HAVE_GDI) || defined (VISP_HAVE_D3D9)
    delete d1;
    delete d2;
    delete d3;
    delete d4;
#endif


    vpImage<vpRGBa> I_color_double, I_color_double_half;
    vpImageTools::resize(I_color, I_color_double, I_color.getWidth()*2, I_color.getHeight()*2, (vpImageTools::vpImageInterpolationType) method);
    vpImageTools::resize(I_color_double, I_color_double_half, I_color.getWidth(), I_color.getHeight(), (vpImageTools::vpImageInterpolationType) method);
    std::cout << "\n(I_color == I_color_double_half)? " << (I_color == I_color_double_half) << std::endl;

    double root_mean_square_error = 0.0;
    for (unsigned int i = 0; i < I_color.getHeight(); i++) {
      for (unsigned int j = 0; j < I_color.getWidth(); j++) {
        vpColVector c_error = I_color[i][j] - I_color_double_half[i][j];
        root_mean_square_error += c_error.sumSquare();
      }
    }
    std::cout << "Root Mean Square Error: " << sqrt(root_mean_square_error / (I_color.getSize()*3)) << std::endl;

    vpImage<vpRGBa> I_color_half, I_color_half_double;
    vpImageTools::resize(I_color, I_color_half, I_color.getWidth()/2, I_color.getHeight()/2, (vpImageTools::vpImageInterpolationType) method);
    vpImageTools::resize(I_color_half, I_color_half_double, I_color.getWidth(), I_color.getHeight(), (vpImageTools::vpImageInterpolationType) method);
    std::cout << "\n(I_color == I_color_half_double)? " << (I_color == I_color_half_double) << std::endl;

    root_mean_square_error = 0.0;
    for (unsigned int i = 0; i < I_color.getHeight(); i++) {
      for (unsigned int j = 0; j < I_color.getWidth(); j++) {
        vpColVector c_error = I_color[i][j] - I_color_half_double[i][j];
        root_mean_square_error += c_error.sumSquare();
      }
    }
    std::cout << "Root Mean Square Error: " << sqrt(root_mean_square_error / (I_color.getSize()*3)) << std::endl;


    return EXIT_SUCCESS;
  }
  catch(const vpException &e) {
    std::cerr << "Catch an exception: " << e << std::endl;
    return EXIT_FAILURE;
  }
}