448 lines
14 KiB
Text
448 lines
14 KiB
Text
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/*
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* ghelix6DQ2 implementation
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*
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* Copyright (C) Peter Schneider, Jan Elseberg, Andreas Nuechter
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*
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* Released under the GPL version 3.
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*
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*/
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/**
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* @file
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* @brief The implementation of globally consistent scan matching algorithm by using helix correction
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* @author Peter Schneider. Institute of Computer Science, University of Koblenz, Germany.
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* @author Andreas Nuechter. Jacobs University Bremen gGmbH, Germany
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* @author Jan Elseberg. Jacobs University Bremen gGmbH, Germany
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*/
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#ifdef _MSC_VER
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#if !defined _OPENMP && defined OPENMP
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#define _OPENMP
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#endif
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#endif
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#include "slam6d/ghelix6DQ2.h"
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#include "slam6d/icp6Dhelix.h"
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#include "sparse/csparse.h"
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#include <cfloat>
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#include <fstream>
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using std::flush;
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#include <cstring>
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#include "slam6d/globals.icc"
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using std::ofstream;
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/**
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* Constructor
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*
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* @param my_icp6Dminimizer Pointer to ICP minimization functor
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* @param mdm Maximum PtoP distance to which point pairs are collected for ICP
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* @param max_dist_match Maximum PtoP distance to which point pairs are collected for LUM
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* @param max_num_iterations Maximal number of iterations for ICP
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* @param quiet Suspesses all output to std out
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* @param meta Indicates if metascan matching has to be used
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* @param rnd Indicates if randomization has to be used
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* @param eP Extrapolate odometry?
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* @param anim Animate which frames?
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* @param epsilonICP Termination criterion for ICP
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* @param nns_method Specifies which NNS method to use
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* @param epsilonLUM Termination criterion for LUM
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*/
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ghelix6DQ2::ghelix6DQ2(icp6Dminimizer *my_icp6Dminimizer,
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double mdm, double max_dist_match,
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int max_num_iterations, bool quiet, bool meta, int rnd,
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bool eP, int anim, double epsilonICP, int nns_method, double epsilonLUM)
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: graphSlam6D(my_icp6Dminimizer,
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mdm, max_dist_match,
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max_num_iterations, quiet, meta, rnd,
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eP, anim, epsilonICP, nns_method, epsilonLUM)
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{ }
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/**
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* Destructor
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*/
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ghelix6DQ2::~ghelix6DQ2()
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{
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delete my_icp;
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}
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/**
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* This function generates the matrices B and Bd that are used for solving B * c = Bd.
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* This function has to be called once for every linked scan-pair.
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*
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* @param firstScanNum The number of the first scan of the linked scan-pair
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* @param secondScanNum The number of the second scan of the linked scan-pair
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* @param ptpairs Vector that holds all point-pairs for the actual scan-pair
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* @param B Matrix with dimension (6*(number of scans-1)) x (6 * (number of scans-1))
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* @param Bd Vector with dimension (6*(number of scans-1))
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* @return returns the sum of square distance
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*/
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double ghelix6DQ2::genBBdForLinkedPair( int firstScanNum, int secondScanNum, vPtPair *ptpairs,
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Matrix *B, ColumnVector *Bd )
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{
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double Btemp1[6][3];
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double Btemp2[6][3];
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memset(&Btemp1[0][0], 0, 18 * sizeof(double));
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memset(&Btemp2[0][0], 0, 18 * sizeof(double));
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double bd1[6];
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double bd2[6];
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memset(&bd1[0], 0, 6 * sizeof(double));
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memset(&bd2[0], 0, 6 * sizeof(double));
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double p1x, p1y, p1z, p2x, p2y, p2z, pDistX, pDistY, pDistZ, px2Sq, py2Sq, pz2Sq;
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int n = (*ptpairs).size();
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double sum = 0;
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for (int i = 0; i < n; i++) {
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p1x = (*ptpairs)[i].p1.x;
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p1y = (*ptpairs)[i].p1.y;
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p1z = (*ptpairs)[i].p1.z;
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p2x = (*ptpairs)[i].p2.x;
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p2y = (*ptpairs)[i].p2.y;
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p2z = (*ptpairs)[i].p2.z;
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//px1Sq = p1x * p1x;
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//py1Sq = p1y * p1y;
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//pz1Sq = p1z * p1z;
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px2Sq = p2x * p2x;
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py2Sq = p2y * p2y;
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pz2Sq = p2z * p2z;
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Btemp1[4][0] += -p2z;
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// Btemp1[3][1] += p2z;
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Btemp1[5][0] += p2y;
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// Btemp1[3][2] += -p2y;
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Btemp1[4][2] += p2x;
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// Btemp1[5][1] += -p2x;
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Btemp1[0][0] += pz2Sq + py2Sq;
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Btemp1[1][0] += p2y*-p2x;
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Btemp1[2][0] += -p2z*p2x;
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Btemp1[1][1] += pz2Sq + px2Sq;
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Btemp1[2][1] += p2z*-p2y;
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Btemp1[2][2] += px2Sq + py2Sq;
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pDistX = p1x - p2x;
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pDistY = p1y - p2y;
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pDistZ = p1z - p2z;
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bd1[0] += -p1z*pDistY + p1y*pDistZ;
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bd1[1] += p1z*pDistX - p1x*pDistZ;
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bd1[2] += -p1y*pDistX + p1x*pDistY;
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bd1[3] += pDistX;
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bd1[4] += pDistY;
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bd1[5] += pDistZ;
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bd2[0] += -p2z*-pDistY + p2y*-pDistZ;
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bd2[1] += p2z*-pDistX - p2x*-pDistZ;
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bd2[2] += -p2y*-pDistX + p2x*-pDistY;
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bd2[3] += -pDistX;
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bd2[4] += -pDistY;
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bd2[5] += -pDistZ;
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sum += pDistX*pDistX + pDistY*pDistY + pDistZ*pDistZ;
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}
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#ifdef _OPENMP
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#pragma omp critical (enterB)
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#endif
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{
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int matPlace1 = (firstScanNum-1) * 6;
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if(firstScanNum != 0)
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{
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(*B)(matPlace1+4,matPlace1+4) += n;
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(*B)(matPlace1+5,matPlace1+5) += n;
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(*B)(matPlace1+6,matPlace1+6) += n;
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(*B)(matPlace1+1,matPlace1+5) += Btemp1[4][0];
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(*B)(matPlace1+5,matPlace1+1) += Btemp1[4][0];
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(*B)(matPlace1+2,matPlace1+4) += -Btemp1[4][0];
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(*B)(matPlace1+4,matPlace1+2) += -Btemp1[4][0];
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(*B)(matPlace1+1,matPlace1+6) += Btemp1[5][0];
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(*B)(matPlace1+6,matPlace1+1) += Btemp1[5][0];
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(*B)(matPlace1+3,matPlace1+4) += -Btemp1[5][0];
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(*B)(matPlace1+4,matPlace1+3) += -Btemp1[5][0];
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(*B)(matPlace1+3,matPlace1+5) += Btemp1[4][2];
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(*B)(matPlace1+5,matPlace1+3) += Btemp1[4][2];
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(*B)(matPlace1+2,matPlace1+6) += -Btemp1[4][2];
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(*B)(matPlace1+6,matPlace1+2) += -Btemp1[4][2];
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(*B)(matPlace1+1,matPlace1+2) += Btemp1[1][0];
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(*B)(matPlace1+2,matPlace1+1) += Btemp1[1][0];
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(*B)(matPlace1+1,matPlace1+3) += Btemp1[2][0];
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(*B)(matPlace1+3,matPlace1+1) += Btemp1[2][0];
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(*B)(matPlace1+2,matPlace1+3) += Btemp1[2][1];
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(*B)(matPlace1+3,matPlace1+2) += Btemp1[2][1];
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(*B)(matPlace1+1,matPlace1+1) += Btemp1[0][0];
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(*B)(matPlace1+2,matPlace1+2) += Btemp1[1][1];
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(*B)(matPlace1+3,matPlace1+3) += Btemp1[2][2];
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(*Bd)(matPlace1+1) += bd1[0];
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(*Bd)(matPlace1+2) += bd1[1];
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(*Bd)(matPlace1+3) += bd1[2];
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(*Bd)(matPlace1+4) += bd1[3];
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(*Bd)(matPlace1+5) += bd1[4];
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(*Bd)(matPlace1+6) += bd1[5];
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}
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//-------------------------------------------
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unsigned int matPlace2 = (secondScanNum-1) * 6;
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(*B)(matPlace2+4,matPlace2+4) += n;
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(*B)(matPlace2+5,matPlace2+5) += n;
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(*B)(matPlace2+6,matPlace2+6) += n;
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(*B)(matPlace2+1,matPlace2+5) += Btemp1[4][0];
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(*B)(matPlace2+5,matPlace2+1) += Btemp1[4][0];
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(*B)(matPlace2+2,matPlace2+4) += -Btemp1[4][0];
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(*B)(matPlace2+4,matPlace2+2) += -Btemp1[4][0];
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(*B)(matPlace2+1,matPlace2+6) += Btemp1[5][0];
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(*B)(matPlace2+6,matPlace2+1) += Btemp1[5][0];
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(*B)(matPlace2+3,matPlace2+4) += -Btemp1[5][0];
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(*B)(matPlace2+4,matPlace2+3) += -Btemp1[5][0];
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(*B)(matPlace2+3,matPlace2+5) += Btemp1[4][2];
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(*B)(matPlace2+5,matPlace2+3) += Btemp1[4][2];
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(*B)(matPlace2+2,matPlace2+6) += -Btemp1[4][2];
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(*B)(matPlace2+6,matPlace2+2) += -Btemp1[4][2];
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(*B)(matPlace2+1,matPlace2+2) += Btemp1[1][0];
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(*B)(matPlace2+2,matPlace2+1) += Btemp1[1][0];
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(*B)(matPlace2+1,matPlace2+3) += Btemp1[2][0];
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(*B)(matPlace2+3,matPlace2+1) += Btemp1[2][0];
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(*B)(matPlace2+2,matPlace2+3) += Btemp1[2][1];
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(*B)(matPlace2+3,matPlace2+2) += Btemp1[2][1];
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(*B)(matPlace2+1,matPlace2+1) += Btemp1[0][0];
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(*B)(matPlace2+2,matPlace2+2) += Btemp1[1][1];
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(*B)(matPlace2+3,matPlace2+3) += Btemp1[2][2];
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(*Bd)(matPlace2+1) += bd2[0];
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(*Bd)(matPlace2+2) += bd2[1];
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(*Bd)(matPlace2+3) += bd2[2];
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(*Bd)(matPlace2+4) += bd2[3];
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(*Bd)(matPlace2+5) += bd2[4];
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(*Bd)(matPlace2+6) += bd2[5];
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//-------------------------------------------
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if( firstScanNum != 0)
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{
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(*B)(matPlace1+4,matPlace2+4) -= n;
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(*B)(matPlace1+5,matPlace2+5) -= n;
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(*B)(matPlace1+6,matPlace2+6) -= n;
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(*B)(matPlace1+1,matPlace2+5) += -Btemp1[4][0];
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(*B)(matPlace1+5,matPlace2+1) += -Btemp1[4][0];
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(*B)(matPlace1+2,matPlace2+4) += Btemp1[4][0];
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(*B)(matPlace1+4,matPlace2+2) += Btemp1[4][0];
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(*B)(matPlace1+1,matPlace2+6) += -Btemp1[5][0];
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(*B)(matPlace1+6,matPlace2+1) += -Btemp1[5][0];
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(*B)(matPlace1+3,matPlace2+4) += Btemp1[5][0];
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(*B)(matPlace1+4,matPlace2+3) += Btemp1[5][0];
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(*B)(matPlace1+3,matPlace2+5) += -Btemp1[4][2];
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(*B)(matPlace1+5,matPlace2+3) += -Btemp1[4][2];
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(*B)(matPlace1+2,matPlace2+6) += Btemp1[4][2];
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(*B)(matPlace1+6,matPlace2+2) += Btemp1[4][2];
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(*B)(matPlace1+1,matPlace2+2) += -Btemp1[1][0];
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(*B)(matPlace1+2,matPlace2+1) += -Btemp1[1][0];
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(*B)(matPlace1+1,matPlace2+3) += -Btemp1[2][0];
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(*B)(matPlace1+3,matPlace2+1) += -Btemp1[2][0];
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(*B)(matPlace1+2,matPlace2+3) += -Btemp1[2][1];
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(*B)(matPlace1+3,matPlace2+2) += -Btemp1[2][1];
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(*B)(matPlace1+1,matPlace2+1) += -Btemp1[0][0];
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(*B)(matPlace1+2,matPlace2+2) += -Btemp1[1][1];
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(*B)(matPlace1+3,matPlace2+3) += -Btemp1[2][2];
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//----------------------------------------
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(*B)(matPlace2+4,matPlace1+4) -= n;
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(*B)(matPlace2+5,matPlace1+5) -= n;
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(*B)(matPlace2+6,matPlace1+6) -= n;
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(*B)(matPlace2+1,matPlace1+5) += -Btemp1[4][0];
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(*B)(matPlace2+5,matPlace1+1) += -Btemp1[4][0];
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(*B)(matPlace2+2,matPlace1+4) += Btemp1[4][0];
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(*B)(matPlace2+4,matPlace1+2) += Btemp1[4][0];
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(*B)(matPlace2+1,matPlace1+6) += -Btemp1[5][0];
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(*B)(matPlace2+6,matPlace1+1) += -Btemp1[5][0];
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(*B)(matPlace2+3,matPlace1+4) += Btemp1[5][0];
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(*B)(matPlace2+4,matPlace1+3) += Btemp1[5][0];
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(*B)(matPlace2+3,matPlace1+5) += -Btemp1[4][2];
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(*B)(matPlace2+5,matPlace1+3) += -Btemp1[4][2];
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(*B)(matPlace2+2,matPlace1+6) += Btemp1[4][2];
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(*B)(matPlace2+6,matPlace1+2) += Btemp1[4][2];
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(*B)(matPlace2+1,matPlace1+2) += -Btemp1[1][0];
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(*B)(matPlace2+2,matPlace1+1) += -Btemp1[1][0];
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(*B)(matPlace2+1,matPlace1+3) += -Btemp1[2][0];
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(*B)(matPlace2+3,matPlace1+1) += -Btemp1[2][0];
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(*B)(matPlace2+2,matPlace1+3) += -Btemp1[2][1];
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(*B)(matPlace2+3,matPlace1+2) += -Btemp1[2][1];
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(*B)(matPlace2+1,matPlace1+1) += -Btemp1[0][0];
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(*B)(matPlace2+2,matPlace1+2) += -Btemp1[1][1];
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(*B)(matPlace2+3,matPlace1+3) += -Btemp1[2][2];
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}
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} // of pragma omp critical
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return sqrt( sum / (double) n );
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}
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/**
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* This function is used to match a set of laser scans with any minimally
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* connected Graph, using the globally consistent LUM-algorithm in 3D.
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*
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* @param gr Some Graph with no real subgraphs except for itself
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* @param allScans Contains all laser scans
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* @param nrIt The number of iterations the LUM-algorithm will run
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* @return Euclidian distance of all pose shifts
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*/
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double ghelix6DQ2::doGraphSlam6D(Graph gr, vector <Scan *> allScans, int nrIt)
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{
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#ifdef WRITE_GRAPH_NET
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// for debug only:
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static int d = 0;
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cout << "writing graph.dat ....................................." << endl;
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d++;
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string gfilename = "graph_" + to_string(d, 3) + ".net";
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ofstream out(gfilename.c_str());
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for (int i=0; i < gr.getNrLinks(); i++) {
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int from = gr.getLink(i,0);
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int to = gr.getLink(i,1);
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// shouldn't be necessary, just in case a (out of date) graph file is loaded:
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if (from < (int)allScans.size() && to < (int)allScans.size()) {
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out << allScans[from]->get_rPos()[0] << " "
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<< allScans[from]->get_rPos()[1] << " "
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<< allScans[from]->get_rPos()[2] << endl
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<< allScans[to ]->get_rPos()[0] << " "
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<< allScans[to ]->get_rPos()[1] << " "
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<< allScans[to ]->get_rPos()[2] << endl << endl;
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}
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}
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out.close();
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out.clear();
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#endif
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// the IdentityMatrix to transform some Scans with
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double id[16];
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M4identity(id);
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vPtPair **ptpairs = 0; // Contains sets of point pairs for all links
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Matrix B ( 6 * (gr.getNrScans()-1), 6 * (gr.getNrScans()-1) );
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ColumnVector ccs( 6*(gr.getNrScans()-1) ), bd( 6*(gr.getNrScans()-1) );
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B = 0.0;
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bd = 0.0;
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double sum_position_diff = 0;
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double ret = DBL_MAX;
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for(int iteration = 0;
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iteration < nrIt && ret > epsilonLUM;
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iteration++) {
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sum_position_diff = 0;
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if (nrIt > 1) cout << "Iteration match " << iteration << endl;
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if (ptpairs != 0) delete [] ptpairs;
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ptpairs = new vPtPair*[gr.getNrLinks()];
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for (int i = 0; i < gr.getNrLinks(); i++) {
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ptpairs[i] = new vPtPair;
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}
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// Get all point pairs after ICP
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int end_loop = gr.getNrLinks();
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#ifdef _OPENMP
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omp_set_num_threads(OPENMP_NUM_THREADS);
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#pragma omp parallel for schedule(dynamic)
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#endif
|
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|
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|
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for ( int i = 0; i < end_loop; i++) {
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||
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cout << "P" << i << flush;
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||
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Scan * FirstScan = allScans[gr.getLink(i,0)];
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||
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Scan * SecondScan = allScans[gr.getLink(i,1)];
|
||
|
|
#ifdef _OPENMP
|
||
|
|
int thread_num = omp_get_thread_num();
|
||
|
|
#else
|
||
|
|
int thread_num = 0;
|
||
|
|
#endif
|
||
|
|
double dummy_centroid_m[3];
|
||
|
|
double dummy_centroid_d[3];
|
||
|
|
double dummy_sum;
|
||
|
|
|
||
|
|
Scan::getPtPairs(ptpairs[i], FirstScan, SecondScan, thread_num,
|
||
|
|
(int)my_icp->get_rnd(), (int)max_dist_match2_LUM, dummy_sum,
|
||
|
|
dummy_centroid_m, dummy_centroid_d);
|
||
|
|
|
||
|
|
// faulty network
|
||
|
|
if (ptpairs[i]->size() <= 1) {
|
||
|
|
cout << "Error: Link (" << gr.getLink(i,0)
|
||
|
|
<< " - " << gr.getLink(i, 1) << " ) is empty with "
|
||
|
|
<< ptpairs[i]->size() << " Corr. points. iteration = "
|
||
|
|
<< iteration << endl;
|
||
|
|
// exit(1);
|
||
|
|
|
||
|
|
} else
|
||
|
|
// build the matrix B and vector bd
|
||
|
|
genBBdForLinkedPair( gr.getLink(i,0), gr.getLink(i,1), ptpairs[i], &B, &bd );
|
||
|
|
}
|
||
|
|
cout <<" building matrices done! "<<endl;
|
||
|
|
|
||
|
|
ccs = solveSparseCholesky(B, bd);
|
||
|
|
|
||
|
|
// delete ptPairs
|
||
|
|
for (int i = 0; i < gr.getNrLinks(); i++) {
|
||
|
|
ptpairs[i]->clear();
|
||
|
|
delete (ptpairs[i]);
|
||
|
|
}
|
||
|
|
|
||
|
|
ColumnVector t0(3), t(3), tlast(3);
|
||
|
|
int vectorOffset;
|
||
|
|
|
||
|
|
int loop_end = gr.getNrScans();
|
||
|
|
double alignxfLum[16];
|
||
|
|
for(int i = 1; i < loop_end; i++)
|
||
|
|
{
|
||
|
|
vectorOffset = (i-1) * 6;
|
||
|
|
icp6D_HELIX::computeRt( &ccs, vectorOffset, alignxfLum);
|
||
|
|
|
||
|
|
// Update the Pose
|
||
|
|
|
||
|
|
cout << "Old pose estimate, Scan " << i << endl;
|
||
|
|
cout << "x: " << allScans[i]->get_rPos()[0]
|
||
|
|
<< " y: " << allScans[i]->get_rPos()[1]
|
||
|
|
<< " z: " << allScans[i]->get_rPos()[2]
|
||
|
|
<< " tx: " << allScans[i]->get_rPosTheta()[0]
|
||
|
|
<< " ty: " << allScans[i]->get_rPosTheta()[1]
|
||
|
|
<< " tz: " << allScans[i]->get_rPosTheta()[2]
|
||
|
|
<< endl;
|
||
|
|
|
||
|
|
if (i < loop_end - 1) {
|
||
|
|
allScans[i]->transform(alignxfLum, Scan::LUM, 1);
|
||
|
|
} else {
|
||
|
|
allScans[i]->transform(alignxfLum, Scan::LUM, 2);
|
||
|
|
}
|
||
|
|
|
||
|
|
cout << "x: " << allScans[i]->get_rPos()[0]
|
||
|
|
<< " y: " << allScans[i]->get_rPos()[1]
|
||
|
|
<< " z: " << allScans[i]->get_rPos()[2]
|
||
|
|
<< " tx: " << allScans[i]->get_rPosTheta()[0]
|
||
|
|
<< " ty: " << allScans[i]->get_rPosTheta()[1]
|
||
|
|
<< " tz: " << allScans[i]->get_rPosTheta()[2] << endl << endl;
|
||
|
|
|
||
|
|
sum_position_diff += sqrt( sqr(alignxfLum[12]) + sqr(alignxfLum[13]) + sqr(alignxfLum[14]));
|
||
|
|
|
||
|
|
}
|
||
|
|
cout << "Sum of Position differences = " << sum_position_diff << endl << endl;
|
||
|
|
ret = (sum_position_diff / (double)gr.getNrScans());
|
||
|
|
}
|
||
|
|
delete [] ptpairs;
|
||
|
|
ptpairs = 0;
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|