vpFeatureMomentCentered.cpp

/****************************************************************************
 *
 * $Id: vpFeatureMomentImpl.cpp 3317 2011-09-06 14:14:47Z fnovotny $
 *
 * This file is part of the ViSP software.
 * Copyright (C) 2005 - 2013 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://www.irisa.fr/lagadic/visp/visp.html for more information.
 *
 * This software was developed at:
 * INRIA Rennes - Bretagne Atlantique
 * Campus Universitaire de Beaulieu
 * 35042 Rennes Cedex
 * France
 * http://www.irisa.fr/lagadic
 *
 * 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:
 * Implementation for all supported moment features.
 *
 * Authors:
 * Filip Novotny
 *
 *****************************************************************************/

#include <visp/vpConfig.h>

#ifdef VISP_MOMENTS_COMBINE_MATRICES
#include <vector>
#include <limits>

#include <visp/vpMomentObject.h>
#include <visp/vpFeatureMomentCentered.h>
#include <visp/vpFeatureMomentBasic.h>
#include <visp/vpFeatureMomentGravityCenter.h>
#include <visp/vpMomentGravityCenter.h>
#include <visp/vpFeatureMomentDatabase.h>

vpFeatureMomentCentered::vpFeatureMomentCentered(vpMomentDatabase& moments,
                                                 double A, double B, double C,
                                                 vpFeatureMomentDatabase* featureMoments) :
    vpFeatureMoment(moments,A,B,C,featureMoments)

{
}

vpMatrix    vpFeatureMomentCentered::interaction (unsigned int select_one,unsigned int select_two){
    if(select_one+select_two>moment->getObject().getOrder())
      throw vpException(vpException::badValue,
                        "The requested value has not been computed, you should specify a higher order.");
    return interaction_matrices[select_two*order+select_one];
}


void vpFeatureMomentCentered::compute_interaction(){
    bool found_featuremoment_basic;
    bool found_feature_gravity_center;
    bool found_moment_gravity;

    vpMomentObject& momentObject = moment->getObject();
    order = momentObject.getOrder()+1;
    interaction_matrices.resize(order*order);
    for(std::vector< vpMatrix >::iterator i=interaction_matrices.begin();i!=interaction_matrices.end(); ++i)
        i->resize(1,6);

    vpFeatureMomentBasic& featureMomentBasic= (static_cast<vpFeatureMomentBasic&>(featureMoments->get("vpFeatureMomentBasic",found_featuremoment_basic)));
    vpFeatureMomentGravityCenter& featureMomentGravityCenter= (static_cast<vpFeatureMomentGravityCenter&>(featureMoments->get("vpFeatureMomentGravityCenter",found_feature_gravity_center)));
    vpMomentGravityCenter& momentGravity = static_cast<vpMomentGravityCenter&>(moments.get("vpMomentGravityCenter",found_moment_gravity));
    vpMatrix zeros(1,6);
    for(int i=0;i<6;i++) zeros[0][i]=0;

    if(!found_featuremoment_basic) throw vpException(vpException::notInitialized,"vpFeatureMomentBasic not found");
    if(!found_feature_gravity_center) throw vpException(vpException::notInitialized,"vpFeatureMomentGravityCenter not found");
    if(!found_moment_gravity) throw vpException(vpException::notInitialized,"vpMomentGravityCenter not found");

    vpMatrix LXg = featureMomentGravityCenter.interaction(1<<0);
    vpMatrix LYg = featureMomentGravityCenter.interaction(1<<1);

    //compute centered moment features as a combination of basic features
    for(int i=0;i<(int)order;i++){
        for(int j=0;j<(int)order-i;j++){
            interaction_matrices[(unsigned int)j*order+(unsigned int)i] = zeros;
            vpMatrix mat1 = zeros;
            vpMatrix mat2 = zeros;
            vpMatrix mat3 = zeros;
            for(int k=0;k<=i;k++){
                for(int l=0;l<=j;l++){
                    mat1+= std::abs(momentGravity.get()[0])<std::numeric_limits<double>::epsilon()?zeros:vpMath::comb((unsigned int)i, (unsigned int)k) * vpMath::comb((unsigned int)j, (unsigned int)l) * pow(-momentGravity.get()[0], i - k) * (i - k) * LXg / momentGravity.get()[0] * pow(-momentGravity.get()[1], j - l) * momentObject.get((unsigned int)k, (unsigned int)l);
                    mat2+= std::abs(momentGravity.get()[1])<std::numeric_limits<double>::epsilon()?zeros:vpMath::comb((unsigned int)i, (unsigned int)k) * vpMath::comb((unsigned int)j, (unsigned int)l) * pow(-momentGravity.get()[0], i - k) * pow(-momentGravity.get()[1], j - l) * (j - l) * LYg / momentGravity.get()[1] * momentObject.get((unsigned int)k, (unsigned int)l);
                    mat3+= vpMath::comb((unsigned int)i, (unsigned int)k) * vpMath::comb((unsigned int)j, (unsigned int)l) * pow(-momentGravity.get()[0], i - k) * pow(-momentGravity.get()[1], j - l) * featureMomentBasic.interaction((unsigned int)k, (unsigned int)l);
                }
            }
            interaction_matrices[(unsigned int)j*order+(unsigned int)i]=(mat1+mat2+mat3);
        }
    }
}

#else

#include <vector>
#include <limits>

#include <visp/vpMomentObject.h>
#include <visp/vpMomentGravityCenter.h>
#include <visp/vpMomentCentered.h>
#include <visp/vpFeatureMomentCentered.h>
#include <visp/vpFeatureMomentDatabase.h>


vpFeatureMomentCentered::vpFeatureMomentCentered(vpMomentDatabase& moments,double A, double B, double C,vpFeatureMomentDatabase* featureMoments) :
    vpFeatureMoment(moments,A,B,C,featureMoments)

{
}

vpMatrix    vpFeatureMomentCentered::interaction (unsigned int select_one,unsigned int select_two){
    if(select_one+select_two>moment->getObject().getOrder())
      throw vpException(vpException::badValue,"The requested value has not been computed, you should specify a higher order.");
    return interaction_matrices[select_two*order+select_one];
}


void vpFeatureMomentCentered::compute_interaction(){

    bool found_moment_centered;
    bool found_moment_gravity;

    vpMomentCentered& momentCentered= (static_cast<vpMomentCentered&>(moments.get("vpMomentCentered",found_moment_centered)));
    vpMomentGravityCenter& momentGravity = static_cast<vpMomentGravityCenter&>(moments.get("vpMomentGravityCenter",found_moment_gravity));

    if(!found_moment_centered) throw vpException(vpException::notInitialized,"vpMomentCentered not found");
    if(!found_moment_gravity) throw vpException(vpException::notInitialized,"vpMomentGravityCenter not found");

    int delta;
    int epsilon;
    vpMomentObject& momentObject = moment->getObject();
    order = momentObject.getOrder()+1;
    interaction_matrices.resize(order*order);
    for (std::vector< vpMatrix >::iterator i=interaction_matrices.begin(); i!=interaction_matrices.end(); ++i)
        i->resize(1,6);
    if (momentObject.getType()==vpMomentObject::DISCRETE) {
        delta=0;
        epsilon=1;
    } else {
        delta=1;
        epsilon=4;
    }
    double n11 = momentCentered.get(1,1)/momentObject.get(0,0);
    double n20 = momentCentered.get(2,0)/momentObject.get(0,0);
    double n02 = momentCentered.get(0,2)/momentObject.get(0,0);
    double Xg = momentGravity.getXg();
    double Yg = momentGravity.getYg();
    double mu00 = momentCentered.get(0,0);

    unsigned int VX = 0;
    unsigned int VY = 1;
    unsigned int VZ = 2;
    unsigned int WX = 3;
    unsigned int WY = 4;
    unsigned int WZ = 5;

    interaction_matrices[0][0][VX] = -(delta)*A*mu00;
    interaction_matrices[0][0][VY] = -(delta)*B*mu00;

    // Since mu10=0 and mu01=0
    // interaction_matrices[0][0][WX] =  (3*delta)*MU(0,1)+(3*delta)*Yg*mu00;
    // interaction_matrices[0][0][WY] = -(3*delta)*MU(1,0)-(3*delta)*Xg*mu00;
    // we get the simplification:
    interaction_matrices[0][0][WX] =  (3*delta)*Yg*mu00;
    interaction_matrices[0][0][WY] = -(3*delta)*Xg*mu00;
    interaction_matrices[0][0][VZ] = -A*interaction_matrices[0][0][WY]+B*interaction_matrices[0][0][WX]+(2*delta)*C*mu00;
    interaction_matrices[0][0][WZ] = 0.;

    for (int i=1; i<(int)order-1; i++){
      unsigned int i_ = (unsigned int) i;
      unsigned int im1_ = i_ - 1;
      unsigned int ip1_ = i_ + 1;

      double mu_im10 = momentCentered.get(im1_,0);
      double mu_ip10 = momentCentered.get(ip1_,0);
      double mu_im11 = momentCentered.get(im1_,1);
      double mu_i0 = momentCentered.get(i_,0);
      double mu_i1 = momentCentered.get(i_,1);

      interaction_matrices[i_][0][VX] = -(i+delta)*A*mu_i0-(i*B*mu_im11);
      interaction_matrices[i_][0][VY] = -(delta)*B*mu_i0;

      interaction_matrices[i_][0][WX] = (i+3*delta)*mu_i1+(i+3*delta)*Yg*mu_i0+i*Xg*mu_im11-i*epsilon*n11*mu_im10;
      interaction_matrices[i_][0][WY] = -(i+3*delta)*mu_ip10-(2*i+3*delta)*Xg*mu_i0+i*epsilon*n20*mu_im10;
      interaction_matrices[i_][0][VZ] = -A*interaction_matrices[i_][0][WY]+B*interaction_matrices[i_][0][WX]+(i+2*delta)*C*mu_i0;
      interaction_matrices[i_][0][WZ] = i*mu_im11;
    }

    for(int j=1;j<(int)order-1;j++){
      unsigned int j_ = (unsigned int) j;
      unsigned int jm1_ = j_ - 1;
      unsigned int jp1_ = j_ + 1;

      double mu_0jm1 = momentCentered.get(0,jm1_);
      double mu_0jp1 = momentCentered.get(0,jp1_);
      double mu_1jm1 = momentCentered.get(1,jm1_);
      double mu_0j = momentCentered.get(0,j_);
      double mu_1j = momentCentered.get(1,j_);

      interaction_matrices[j_*order][0][VX] = -(delta)*A*mu_0j;
      interaction_matrices[j_*order][0][VY] = -j*A*mu_1jm1-(j+delta)*B*mu_0j;

      interaction_matrices[j_*order][0][WX] = (j+3*delta)*mu_0jp1+(2*j+3*delta)*Yg*mu_0j-j*epsilon*n02*mu_0jm1;
      interaction_matrices[j_*order][0][WY] = -(j+3*delta)*mu_1j-(j+3*delta)*Xg*mu_0j-j*Yg*mu_1jm1+j*epsilon*n11*mu_0jm1;
      interaction_matrices[j_*order][0][VZ] = -A*interaction_matrices[j_*order][0][WY]+B*interaction_matrices[j_*order][0][WX]+(j+2*delta)*C*mu_0j;
      interaction_matrices[j_*order][0][WZ] = -j*mu_1jm1;
    }

    for(int j=1; j<(int)order-1; j++) {
      unsigned int j_ = (unsigned int) j;
      unsigned int jm1_ = j_ - 1;
      unsigned int jp1_ = j_ + 1;
      for(int i=1; i<(int)order-j-1; i++) {
        unsigned int i_ = (unsigned int) i;
        unsigned int im1_ = i_ - 1;
        unsigned int ip1_ = i_ + 1;

        double mu_ijm1   = momentCentered.get(i_,jm1_);
        double mu_ij     = momentCentered.get(i_,j_);
        double mu_ijp1   = momentCentered.get(i_,jp1_);
        double mu_im1j   = momentCentered.get(im1_,j_);
        double mu_im1jp1 = momentCentered.get(im1_,jp1_);
        double mu_ip1jm1 = momentCentered.get(ip1_,jm1_);
        double mu_ip1j   = momentCentered.get(ip1_,j_);

        interaction_matrices[j_*order+i_][0][VX] = -(i+delta)*A*mu_ij-i*B*mu_im1jp1;
        interaction_matrices[j_*order+i_][0][VY] = -j*A*mu_ip1jm1-(j+delta)*B*mu_ij;

        interaction_matrices[j_*order+i_][0][WX] = (i+j+3*delta)*mu_ijp1+(i+2*j+3*delta)*Yg*mu_ij
                                                   +i*Xg*mu_im1jp1-i*epsilon*n11*mu_im1j-j*epsilon*n02*mu_ijm1;
        interaction_matrices[j_*order+i_][0][WY] = -(i+j+3*delta)*mu_ip1j-(2*i+j+3*delta)*Xg*mu_ij
                                                   -j*Yg*mu_ip1jm1+i*epsilon*n20*mu_im1j+j*epsilon*n11*mu_ijm1;
        interaction_matrices[j_*order+i_][0][VZ] = -A*interaction_matrices[j_*order+i_][0][WY]+B*interaction_matrices[j_*order+i_][0][WX]+(i+j+2*delta)*C*mu_ij;
        interaction_matrices[j_*order+i_][0][WZ] = i*mu_im1jp1-j*mu_ip1jm1;
      }
    }
  }
#endif