ViSP  2.8.0
vpMomentArea.cpp
1 /****************************************************************************
2  *
3  * $Id: vpMomentArea.cpp 3530 2012-01-03 10:52:12Z fspindle $
4  *
5  * This file is part of the ViSP software.
6  * Copyright (C) 2005 - 2013 by INRIA. All rights reserved.
7  *
8  * This software is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU General Public License
10  * ("GPL") version 2 as published by the Free Software Foundation.
11  * See the file LICENSE.txt at the root directory of this source
12  * distribution for additional information about the GNU GPL.
13  *
14  * For using ViSP with software that can not be combined with the GNU
15  * GPL, please contact INRIA about acquiring a ViSP Professional
16  * Edition License.
17  *
18  * See http://www.irisa.fr/lagadic/visp/visp.html for more information.
19  *
20  * This software was developed at:
21  * INRIA Rennes - Bretagne Atlantique
22  * Campus Universitaire de Beaulieu
23  * 35042 Rennes Cedex
24  * France
25  * http://www.irisa.fr/lagadic
26  *
27  * If you have questions regarding the use of this file, please contact
28  * INRIA at visp@inria.fr
29  *
30  * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
31  * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
32  *
33  *
34  * Description:
35  * 2D area of the object
36  *
37  * Authors:
38  * Manikandan Bakthavatchalam
39  *
40  *****************************************************************************/
41 #include <visp/vpMomentArea.h>
42 #include <visp/vpMomentObject.h>
43 #include <visp/vpMomentCentered.h>
44 #include <visp/vpMomentDatabase.h>
45 #include <cmath>
46 
52  /* getObject() returns a reference to a vpMomentObject. This is public member of vpMoment */
53  if(getObject().getType()==vpMomentObject::DISCRETE) {
54  bool found_moment_centered;
55  /* getMoments() returns a reference to a vpMomentDatabase. It is a protected member of and is inherited from vpMoment
56  * .get() is a member function of vpMomentDatabase that returns a specific moment which is linked to it
57  */
58  vpMomentCentered& momentCentered = static_cast<vpMomentCentered&>(getMoments().get("vpMomentCentered",found_moment_centered));
59  if(!found_moment_centered) throw vpException(vpException::notInitialized,"vpMomentCentered not found");
60  values[0] = momentCentered.get(2,0) + momentCentered.get(0,2);
61  }
62  else {
63  values[0] = getObject().get(0,0);
64  }
65 }
66 
71  values.resize(1);
72 }
73 
77 std::ostream & operator<<(std::ostream & os, const vpMomentArea& m){
78  os << "Area a:" << m.values[0];
79  return os;
80 }
vpMomentObject & getObject() const
Definition: vpMoment.h:119
vpMomentDatabase & getMoments()
Definition: vpMoment.h:115
double get(unsigned int i, unsigned int j)
error that can be emited by ViSP classes.
Definition: vpException.h:75
Class handling the surface moment.
Definition: vpMomentArea.h:57
vpMoment & get(const char *type, bool &found)
This class defines shared methods/attributes for 2D moments.
Definition: vpMoment.h:104
std::vector< double > & get()
This class defines the double-indexed centered moment descriptor .
VISP_EXPORT std::ostream & operator<<(std::ostream &os, const vpImagePoint &ip)
Definition: vpImagePoint.h:529
std::vector< double > values
Definition: vpMoment.h:110