ViSP  2.8.0
vpMomentAreaNormalized.cpp
1 /****************************************************************************
2  *
3  * $Id: vpMomentAreaNormalized.cpp 4056 2013-01-05 13:04:42Z fspindle $
4  *
5  * This file is part of the ViSP software.
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12  * distribution for additional information about the GNU GPL.
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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.
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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
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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 normalized surface moment descriptor (usually described as An)
36  *
37  * Authors:
38  * Filip Novotny
39  *
40  *****************************************************************************/
41 #include <visp/vpMomentAreaNormalized.h>
42 #include <visp/vpMomentObject.h>
43 #include <visp/vpMomentCentered.h>
44 #include <visp/vpMomentDatabase.h>
45 #include <cmath>
46 
47 
53  bool found_moment_centered;
54 
55  /* getMoments() returns a reference to a vpMomentDatabase. (a protected member inherited from vpMoment)
56  .get() is a member function of vpMomentDatabase that returns a specific moment which is linked to it*/
57  vpMomentCentered& momentCentered = static_cast<vpMomentCentered&>(getMoments().get("vpMomentCentered",found_moment_centered));
58 
59  if(!found_moment_centered) throw vpException(vpException::notInitialized,"vpMomentCentered not found");
60 
61  double a;
62  /* getObject() returns a reference to the vpMomentObject from which
63  * the moment values are calculated. (public member of vpMoment)*/
64  if(getObject().getType()==vpMomentObject::DISCRETE)
65  a = momentCentered.get(2,0)+momentCentered.get(0,2);
66  else
67  a = getObject().get(0,0);
68 
69  values[0] = desiredDepth*sqrt(desiredSurface/a);
70 }
71 
77 vpMomentAreaNormalized::vpMomentAreaNormalized(double desiredSurface, double desiredDepth) : vpMoment(),desiredSurface(desiredSurface),desiredDepth(desiredDepth){
78  values.resize(1);
79 }
80 
84 std::ostream & operator<<(std::ostream & os, const vpMomentAreaNormalized& m){
85  os << "An:" << m.values[0] ;
86 
87  return os;
88 }
Class handling the normalized surface moment that is invariant in scale and used to estimate depth...
vpMomentObject & getObject() const
Definition: vpMoment.h:119
vpMomentDatabase & getMoments()
Definition: vpMoment.h:115
vpMomentAreaNormalized(double desiredSurface, double desiredDepth)
double get(unsigned int i, unsigned int j)
error that can be emited by ViSP classes.
Definition: vpException.h:75
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