Configuration

cartographer.common.proto.CeresSolverOptions

bool use_nonmonotonic_steps
Configure the Ceres solver. See the Ceres documentation for more information: https://code.google.com/p/ceres-solver/
int32 max_num_iterations
Not yet documented.
int32 num_threads
Not yet documented.

cartographer.kalman_filter.proto.PoseTrackerOptions

double position_model_variance
Model variances depend linearly on time.
double orientation_model_variance
Not yet documented.
double velocity_model_variance
Not yet documented.
double imu_gravity_time_constant
Time constant for the orientation moving average based on observed gravity via linear acceleration.
double imu_gravity_variance
Not yet documented.
int32 num_odometry_states
Maximum number of previous odometry states to keep.

cartographer.mapping.proto.MapBuilderOptions

bool use_trajectory_builder_2d
Not yet documented.
cartographer.mapping_2d.proto.LocalTrajectoryBuilderOptions trajectory_builder_2d_options
Not yet documented.
bool use_trajectory_builder_3d
Not yet documented.
cartographer.mapping_3d.proto.LocalTrajectoryBuilderOptions trajectory_builder_3d_options
Not yet documented.
int32 num_background_threads
Number of threads to use for background computations.
cartographer.mapping.proto.SparsePoseGraphOptions sparse_pose_graph_options
Not yet documented.

cartographer.mapping.proto.SparsePoseGraphOptions

int32 optimize_every_n_scans
Online loop closure: If positive, will run the loop closure while the map is built.
cartographer.mapping.sparse_pose_graph.proto.ConstraintBuilderOptions constraint_builder_options
Options for the constraint builder.
cartographer.mapping.sparse_pose_graph.proto.OptimizationProblemOptions optimization_problem_options
Options for the optimization problem.
int32 max_num_final_iterations
Number of iterations to use in ‘optimization_problem_options’ for the final optimization.
double global_sampling_ratio
Rate at which we sample a single trajectory’s scans for global localization.

cartographer.mapping.sparse_pose_graph.proto.ConstraintBuilderOptions

double sampling_ratio
A constraint will be added if the proportion of added constraints to potential constraints drops below this number.
double max_constraint_distance
Threshold for poses to be considered near a submap.
cartographer.sensor.proto.AdaptiveVoxelFilterOptions adaptive_voxel_filter_options
Voxel filter used to compute a sparser point cloud for matching.
double min_score
Threshold for the scan match score below which a match is not considered. Low scores indicate that the scan and map do not look similar.
double global_localization_min_score
Threshold below which global localizations are not trusted.
double lower_covariance_eigenvalue_bound
Lower bound for covariance eigenvalues to limit the weight of matches.
bool log_matches
If enabled, logs information of loop-closing constraints for debugging.
cartographer.mapping_2d.scan_matching.proto.FastCorrelativeScanMatcherOptions fast_correlative_scan_matcher_options
Options for the internally used scan matchers.
cartographer.mapping_2d.scan_matching.proto.CeresScanMatcherOptions ceres_scan_matcher_options
Not yet documented.
cartographer.mapping_3d.scan_matching.proto.FastCorrelativeScanMatcherOptions fast_correlative_scan_matcher_options_3d
Not yet documented.
cartographer.mapping_3d.scan_matching.proto.CeresScanMatcherOptions ceres_scan_matcher_options_3d
Not yet documented.

cartographer.mapping.sparse_pose_graph.proto.OptimizationProblemOptions

double huber_scale
Scaling parameter for Huber loss function.
double acceleration_weight
Scaling parameter for the IMU acceleration term.
double rotation_weight
Scaling parameter for the IMU rotation term.
double consecutive_scan_translation_penalty_factor
Penalty factors for changes to the relative pose between consecutive scans.
double consecutive_scan_rotation_penalty_factor
Not yet documented.
bool log_solver_summary
If true, the Ceres solver summary will be logged for every optimization.
cartographer.common.proto.CeresSolverOptions ceres_solver_options
Not yet documented.

cartographer.mapping_2d.proto.LocalTrajectoryBuilderOptions

float min_range
Rangefinder points outside these ranges will be dropped.
float max_range
Not yet documented.
float min_z
Not yet documented.
float max_z
Not yet documented.
float missing_data_ray_length
Points beyond ‘max_range’ will be inserted with this length as empty space.
float voxel_filter_size
Voxel filter that gets applied to the range data immediately after cropping.
bool use_online_correlative_scan_matching
Whether to solve the online scan matching first using the correlative scan matcher to generate a good starting point for Ceres.
cartographer.sensor.proto.AdaptiveVoxelFilterOptions adaptive_voxel_filter_options
Voxel filter used to compute a sparser point cloud for matching.
cartographer.mapping_2d.scan_matching.proto.RealTimeCorrelativeScanMatcherOptions real_time_correlative_scan_matcher_options
Not yet documented.
cartographer.mapping_2d.scan_matching.proto.CeresScanMatcherOptions ceres_scan_matcher_options
Not yet documented.
cartographer.mapping_3d.proto.MotionFilterOptions motion_filter_options
Not yet documented.
double imu_gravity_time_constant
Time constant in seconds for the orientation moving average based on observed gravity via the IMU. It should be chosen so that the error 1. from acceleration measurements not due to gravity (which gets worse when the constant is reduced) and 2. from integration of angular velocities (which gets worse when the constant is increased) is balanced.
int32 num_odometry_states
Maximum number of previous odometry states to keep.
cartographer.mapping_2d.proto.SubmapsOptions submaps_options
Not yet documented.
bool use_imu_data
True if IMU data should be expected and used.

cartographer.mapping_2d.proto.RangeDataInserterOptions

double hit_probability
Probability change for a hit (this will be converted to odds and therefore must be greater than 0.5).
double miss_probability
Probability change for a miss (this will be converted to odds and therefore must be less than 0.5).
bool insert_free_space
If ‘false’, free space will not change the probabilities in the occupancy grid.

cartographer.mapping_2d.proto.SubmapsOptions

double resolution
Resolution of the map in meters.
double half_length
Half the width/height of each submap, its “radius”.
int32 num_range_data
Number of scans before adding a new submap. Each submap will get twice the number of scans inserted: First for initialization without being matched against, then while being matched.
bool output_debug_images
If enabled, submap%d.png images are written for debugging.
cartographer.mapping_2d.proto.RangeDataInserterOptions range_data_inserter_options
Not yet documented.

cartographer.mapping_2d.scan_matching.proto.CeresScanMatcherOptions

double occupied_space_weight
Scaling parameters for each cost functor.
double translation_weight
Not yet documented.
double rotation_weight
Not yet documented.
double covariance_scale
Scale applied to the covariance estimate from Ceres.
cartographer.common.proto.CeresSolverOptions ceres_solver_options
Configure the Ceres solver. See the Ceres documentation for more information: https://code.google.com/p/ceres-solver/

cartographer.mapping_2d.scan_matching.proto.FastCorrelativeScanMatcherOptions

double linear_search_window
Minimum linear search window in which the best possible scan alignment will be found.
double angular_search_window
Minimum angular search window in which the best possible scan alignment will be found.
int32 branch_and_bound_depth
Number of precomputed grids to use.

cartographer.mapping_2d.scan_matching.proto.RealTimeCorrelativeScanMatcherOptions

double linear_search_window
Minimum linear search window in which the best possible scan alignment will be found.
double angular_search_window
Minimum angular search window in which the best possible scan alignment will be found.
double translation_delta_cost_weight
Weights applied to each part of the score.
double rotation_delta_cost_weight
Not yet documented.

cartographer.mapping_3d.proto.KalmanLocalTrajectoryBuilderOptions

bool use_online_correlative_scan_matching
Whether to solve the online scan matching first using the correlative scan matcher to generate a good starting point for Ceres.
cartographer.mapping_2d.scan_matching.proto.RealTimeCorrelativeScanMatcherOptions real_time_correlative_scan_matcher_options
Not yet documented.
cartographer.kalman_filter.proto.PoseTrackerOptions pose_tracker_options
Not yet documented.
double scan_matcher_variance
Not yet documented.
double odometer_translational_variance
Not yet documented.
double odometer_rotational_variance
Not yet documented.

cartographer.mapping_3d.proto.LocalTrajectoryBuilderOptions

cartographer.mapping_3d.proto.MotionFilterOptions

double max_time_seconds
Threshold above which a new scan is inserted based on time.
double max_distance_meters
Threshold above which a new scan is inserted based on linear motion.
double max_angle_radians
Threshold above which a new scan is inserted based on rotational motion.

cartographer.mapping_3d.proto.OptimizingLocalTrajectoryBuilderOptions

double high_resolution_grid_weight
Not yet documented.
double low_resolution_grid_weight
Not yet documented.
double velocity_weight
Not yet documented.
double translation_weight
Not yet documented.
double rotation_weight
Not yet documented.
double odometry_translation_weight
Not yet documented.
double odometry_rotation_weight
Not yet documented.

cartographer.mapping_3d.proto.RangeDataInserterOptions

double hit_probability
Probability change for a hit (this will be converted to odds and therefore must be greater than 0.5).
double miss_probability
Probability change for a miss (this will be converted to odds and therefore must be less than 0.5).
int32 num_free_space_voxels
Up to how many free space voxels are updated for scan matching. 0 disables free space.

cartographer.mapping_3d.proto.SubmapsOptions

double high_resolution
Resolution of the ‘high_resolution’ map in meters used for local SLAM and loop closure.
double high_resolution_max_range
Maximum range to filter the point cloud to before insertion into the ‘high_resolution’ map.
double low_resolution
Resolution of the ‘low_resolution’ version of the map in meters used for local SLAM only.
int32 num_range_data
Number of scans before adding a new submap. Each submap will get twice the number of scans inserted: First for initialization without being matched against, then while being matched.
cartographer.mapping_3d.proto.RangeDataInserterOptions range_data_inserter_options
Not yet documented.

cartographer.mapping_3d.scan_matching.proto.CeresScanMatcherOptions

double translation_weight
Scaling parameters for each cost functor.
double rotation_weight
Not yet documented.
bool only_optimize_yaw
Whether only to allow changes to yaw, keeping roll/pitch constant.
cartographer.common.proto.CeresSolverOptions ceres_solver_options
Configure the Ceres solver. See the Ceres documentation for more information: https://code.google.com/p/ceres-solver/

cartographer.mapping_3d.scan_matching.proto.FastCorrelativeScanMatcherOptions

int32 branch_and_bound_depth
Number of precomputed grids to use.
int32 full_resolution_depth
Number of full resolution grids to use, additional grids will reduce the resolution by half each.
int32 rotational_histogram_size
Number of histogram buckets for the rotational scan matcher.
double min_rotational_score
Minimum score for the rotational scan matcher.
double linear_xy_search_window
Linear search window in the plane orthogonal to gravity in which the best possible scan alignment will be found.
double linear_z_search_window
Linear search window in the gravity direction in which the best possible scan alignment will be found.
double angular_search_window
Minimum angular search window in which the best possible scan alignment will be found.

cartographer.sensor.proto.AdaptiveVoxelFilterOptions

float max_length
‘max_length’ of a voxel edge.
float min_num_points
If there are more points and not at least ‘min_num_points’ remain, the voxel length is reduced trying to get this minimum number of points.
float max_range
Points further away from the origin are removed.