vpDetectorBase.cpp

/****************************************************************************
 *
 * 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:
 * Base class for object detection.
 *
 * Authors:
 * Fabien Spindler
 *
 *****************************************************************************/
#include <visp3/core/vpConfig.h>

#include <visp3/detection/vpDetectorBase.h>

vpDetectorBase::vpDetectorBase() : m_polygon(), m_message(), m_nb_objects(0) {}

std::vector<vpImagePoint> &vpDetectorBase::getPolygon(size_t i)
{
  if (i < m_polygon.size())
    return m_polygon[i];
  else
    throw(vpException(vpException::badValue, "Bad index to retrieve object %d. Only %d objects are detected.", i,
                      m_polygon.size()));
}

std::string &vpDetectorBase::getMessage(size_t i)
{
  if (i < m_polygon.size())
    return m_message[i];
  else
    throw(vpException(vpException::badValue, "Bad index to retrieve object %d . Only %d objects are detected.", i,
                      m_polygon.size()));
}

vpImagePoint vpDetectorBase::getCog(size_t i) const
{
  vpImagePoint cog(0, 0);
  for (size_t j = 0; j < m_polygon[i].size(); j++) {
    cog += m_polygon[i][j];
  }
  cog /= (double)m_polygon[i].size();
  return cog;
}

vpRect vpDetectorBase::getBBox(size_t i) const
{
  assert(m_polygon[i].size() > 2);

  double left, right;
  double top, bottom;
  left = right = m_polygon[i][0].get_u();
  top = bottom = m_polygon[i][0].get_v();
  for (size_t j = 0; j < m_polygon[i].size(); j++) {
    double u = m_polygon[i][j].get_u();
    double v = m_polygon[i][j].get_v();
    if (u < left)
      left = u;
    if (u > right)
      right = u;
    if (v < top)
      top = v;
    if (v > bottom)
      bottom = v;
  }
  vpRect roi(vpImagePoint(top, left), vpImagePoint(bottom, right));
  return roi;
}