testUndistortImage.cpp

Undistort an image.Read an image from the disk, undistort it and save the undistorted image on the disk.

/****************************************************************************
 *
 * 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 as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 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 for image undistortion.
 *
 * Authors:
 * Anthony Saunier
 *
 *****************************************************************************/

#include <stdlib.h>
#include <visp3/core/vpDebug.h>
#include <visp3/core/vpImage.h>
#include <visp3/core/vpImageTools.h>
#include <visp3/core/vpIoTools.h>
#include <visp3/core/vpRGBa.h>
#include <visp3/core/vpTime.h>
#include <visp3/io/vpImageIo.h>
#include <visp3/io/vpParseArgv.h>
// List of allowed command line options
#define GETOPTARGS "cdi:o:h"

//#define COLOR
#define BW

/*

  Print the program options.

  \param name : Program name.
  \param badparam : Bad parameter name.
  \param ipath: Input image path.
  \param opath : Output image path.
  \param user : Username.

 */
void usage(const char *name, const char *badparam, const std::string &ipath, const std::string &opath,
           const std::string &user)
{
  fprintf(stdout, "\n\
Read an image from the disk, undistort it \n\
and save the undistorted image on the disk.\n\
(Klimt_undistorted.pgm).\n\
\n\
SYNOPSIS\n\
  %s [-i <input image path>] [-o <output image path>]\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 \"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\
  -o <output image path>                               %s\n\
     Set image output path.\n\
     From this directory, creates the \"%s\"\n\
     subdirectory depending on the username, where \n\
     Klimt_undistorted.pgm output image is written.\n\
\n\
  -h\n\
     Print the help.\n\n", ipath.c_str(), opath.c_str(), user.c_str());

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

bool getOptions(int argc, const char **argv, std::string &ipath, std::string &opath, const std::string &user)
{
  const char *optarg_;
  int c;
  while ((c = vpParseArgv::parse(argc, argv, GETOPTARGS, &optarg_)) > 1) {

    switch (c) {
    case 'i':
      ipath = optarg_;
      break;
    case 'o':
      opath = optarg_;
      break;
    case 'h':
      usage(argv[0], NULL, ipath, opath, user);
      return false;
      break;

    case 'c':
    case 'd':
      break;

    default:
      usage(argv[0], optarg_, ipath, opath, user);
      return false;
      break;
    }
  }

  if ((c == 1) || (c == -1)) {
    // standalone param or error
    usage(argv[0], NULL, ipath, opath, user);
    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 opt_opath;
    std::string ipath;
    std::string opath;
    std::string filename;
    std::string username;

    // 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;

// Set the default output path
#if !defined(_WIN32) && (defined(__unix__) || defined(__unix) || (defined(__APPLE__) && defined(__MACH__))) // UNIX
    opt_opath = "/tmp";
#elif defined(_WIN32)
    opt_opath = "C:\\temp";
#endif

    // Get the user login name
    vpIoTools::getUserName(username);

    // Read the command line options
    if (getOptions(argc, argv, opt_ipath, opt_opath, username) == false) {
      exit(-1);
    }

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

    // Append to the output path string, the login name of the user
    opath = vpIoTools::createFilePath(opath, username);

    // Test if the output path exist. If no try to create it
    if (vpIoTools::checkDirectory(opath) == false) {
      try {
        // Create the dirname
        vpIoTools::makeDirectory(opath);
      } catch (...) {
        usage(argv[0], NULL, ipath, opt_opath, username);
        std::cerr << std::endl << "ERROR:" << std::endl;
        std::cerr << "  Cannot create " << opath << std::endl;
        std::cerr << "  Check your -o " << opt_opath << " option " << std::endl;
        exit(-1);
      }
    }

    // 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, opt_opath, username);
      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(-1);
    }

//
// Here starts really the test
//
#if defined BW
    vpImage<unsigned char> I; // Input image
    vpImage<unsigned char> U; // undistorted output image
#elif defined COLOR
    vpImage<vpRGBa> I; // Input image
    vpImage<vpRGBa> U; // undistorted output image
#endif
    vpCameraParameters cam;
    cam.initPersProjWithDistortion(600, 600, 192, 144, -0.17, 0.17);
// Read the input grey image from the disk
#if defined BW
    filename = vpIoTools::createFilePath(ipath, "Klimt/Klimt.pgm");
#elif defined COLOR
    filename = vpIoTools::createFilePath(ipath, "Klimt/Klimt.ppm");
#endif
    std::cout << "Read image: " << filename << std::endl;
    vpImageIo::read(I, filename);

    std::cout << "Undistortion in process... " << std::endl;
    vpImageTools::undistort(I, cam, U);

    double begintime = vpTime::measureTimeMs();

    // For the test, to have a significant time measure we repeat the
    // undistortion 100 times
    for (unsigned int i = 0; i < 100; i++)
      // Create the undistorted image
      vpImageTools::undistort(I, cam, U);

    double endtime = vpTime::measureTimeMs();

    std::cout << "Time for 100 undistortion (ms): " << endtime - begintime << std::endl;

// Write the undistorted image on the disk
#if defined BW
    filename = vpIoTools::path(vpIoTools::createFilePath(opath, "Klimt_undistorted.pgm"));
#elif defined COLOR
    filename = vpIoTools::path(vpIoTools::createFilePath(opath, "Klimt_undistorted.ppm"));
#endif
    std::cout << "Write undistorted image: " << filename << std::endl;
    vpImageIo::write(U, filename);
    return 0;
  } catch (vpException &e) {
    std::cout << "Catch an exception: " << e << std::endl;
    return 1;
  }
}