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working example!

release/4.3a0
Luca 2016-06-07 20:54:42 -04:00
parent 46e688bd36
commit 63bd6709f5
1 changed files with 13 additions and 13 deletions
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26
examples/ImuFactorsExample.cpp
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@ -57,7 +57,7 @@ int main(int argc, char* argv[])
// Set up output file for plotting errors
FILE* fp_out = fopen(output_filename.c_str(), "w+");
fprintf(fp_out, "#time(s),x(m),y(m),z(m),qx,qy,qz,qw,gt_x(m),gt_y(m),gt_z(m),gt_qx,gt_qy,gt_qz,gt_qw\n");
//fprintf(fp_out, "#time(s),x(m),y(m),z(m),qx,qy,qz,qw,gt_x(m),gt_y(m),gt_z(m),gt_qx,gt_qy,gt_qz,gt_qw\n");
// Begin parsing the CSV file. Input the first line for initialization.
// From there, we'll iterate through the file and we'll preintegrate the IMU
@ -108,10 +108,10 @@ int main(int argc, char* argv[])
double gyro_bias_rw_sigma = 0.000001454441043;
Matrix3d measured_acc_cov = Matrix3d::Identity(3,3) * pow(accel_noise_sigma,2);
Matrix3d measured_omega_cov = Matrix3d::Identity(3,3) * pow(gyro_noise_sigma,2);
Matrix3d integration_error_cov = Matrix3d::Identity(3,3)*1e4; // error committed in integrating position from velocities
Matrix3d integration_error_cov = Matrix3d::Identity(3,3)*1e-8; // error committed in integrating position from velocities
Matrix3d bias_acc_cov = Matrix3d::Identity(3,3) * pow(accel_bias_rw_sigma,2);
Matrix3d bias_omega_cov = Matrix3d::Identity(3,3) * pow(gyro_bias_rw_sigma,2);
Eigen::Matrix<double,6,6> bias_acc_omega_int = MatrixXd::Identity(6,6)*1e-3; // error in the bias used for preintegration
Eigen::Matrix<double,6,6> bias_acc_omega_int = MatrixXd::Identity(6,6)*1e-5; // error in the bias used for preintegration
//#ifdef USE_COMBINED
boost::shared_ptr<PreintegratedCombinedMeasurements::Params> p = PreintegratedCombinedMeasurements::Params::MakeSharedD(0.0);
@ -138,7 +138,7 @@ int main(int argc, char* argv[])
imuBias::ConstantBias prev_bias = prior_imu_bias;
// Keep track of the total error over the entire run for a simple performance metric.
double pose_error_sum = 0.0, orientation_error_sum = 0.0;
double current_position_error = 0.0, current_orientation_error = 0.0;
double output_time = 0.0;
double dt = 0.005; // The real system has noise, but here, results are nearly
@ -212,8 +212,8 @@ int main(int argc, char* argv[])
LevenbergMarquardtOptimizer optimizer(*graph, initial_values);
Values result = optimizer.optimize();
cout << "Residual error (before opt): " << graph->error(initial_values) << " ";
cout << "Residual error (after opt): " << graph->error(result) << " ";
//cout << "Residual error (before opt): " << graph->error(initial_values) << " ";
//cout << "Residual error (after opt): " << graph->error(result) << " ";
// Overwrite the beginning of the preintegration for the next step.
prev_state = NavState(result.at<Pose3>(X(correction_count)),
@ -222,12 +222,15 @@ int main(int argc, char* argv[])
// Reset the preintegration object.
imu_preintegrated_->resetIntegrationAndSetBias(prev_bias);
//prev_bias.print();
// prev_bias.print();
// Print out the position and orientation error for comparison.
Vector3d gtsam_position = prev_state.pose().translation().vector();
Vector3d position_error = gtsam_position - gps.head<3>();
pose_error_sum += position_error.norm();
//cout << "gtsam_position " << gtsam_position.transpose() << endl;
//cout << " gps_position " << gps.head<3>().transpose() << endl;
//cout << "position_error " << position_error.transpose() << endl;
current_position_error = position_error.norm();
Quaterniond gtsam_quat = prev_state.pose().rotation().toQuaternion();
Quaterniond gps_quat(gps(6), gps(3), gps(4), gps(5));
@ -236,10 +239,10 @@ int main(int argc, char* argv[])
Vector3d euler_angle_error(quat_error.x()*2,
quat_error.y()*2,
quat_error.z()*2);
orientation_error_sum += euler_angle_error.norm();
current_orientation_error = euler_angle_error.norm();
// display statistics
cout << "Position error:" << pose_error_sum << "\t " << "Angular error:" << orientation_error_sum << "\n";
cout << "Position error:" << current_position_error << "\t " << "Angular error:" << current_orientation_error << "\n";
fprintf(fp_out, "%f,%f,%f,%f,%f,%f,%f,%f,%f,%f,%f,%f,%f,%f,%f\n",
output_time, gtsam_position(0), gtsam_position(1), gtsam_position(2),
@ -253,11 +256,8 @@ int main(int argc, char* argv[])
cerr << "ERROR parsing file\n";
return 1;
}
}
fclose(fp_out);
cout << "Complete, results written to " << output_filename << "\n\n";;
return 0;
}