Merged in jeraguilon/gtsam/fixed-lag-smoother-wrapper (pull request #384)
Added the fixed lag smoother wrapperrelease/4.3a0
Jeremy Aguilon
Frank Dellaert
commit
d7b7c07bb7
1
THANKS
1
THANKS
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@ -1,5 +1,6 @@
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GTSAM was made possible by the efforts of many collaborators at Georgia Tech, listed below with their current afffiliation, if they left Tech:
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* Jeremy Aguilon, Facebook
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* Sungtae An
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* Doru Balcan, Bank of America
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* Chris Beall
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@ -0,0 +1,102 @@
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"""
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GTSAM Copyright 2010-2018, Georgia Tech Research Corporation,
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Atlanta, Georgia 30332-0415
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All Rights Reserved
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Authors: Frank Dellaert, et al. (see THANKS for the full author list)
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See LICENSE for the license information
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Demonstration of the fixed-lag smoothers using a planar robot example
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and multiple odometry-like sensors
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Author: Frank Dellaert (C++), Jeremy Aguilon (Python)
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"""
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import numpy as np
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import gtsam
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import gtsam_unstable
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def _timestamp_key_value(key, value):
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"""
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"""
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return gtsam_unstable.FixedLagSmootherKeyTimestampMapValue(
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key, value
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)
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def BatchFixedLagSmootherExample():
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"""
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Runs a batch fixed smoother on an agent with two odometry
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sensors that is simply moving to the
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"""
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# Define a batch fixed lag smoother, which uses
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# Levenberg-Marquardt to perform the nonlinear optimization
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lag = 2.0
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smoother_batch = gtsam_unstable.BatchFixedLagSmoother(lag)
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# Create containers to store the factors and linearization points
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# that will be sent to the smoothers
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new_factors = gtsam.NonlinearFactorGraph()
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new_values = gtsam.Values()
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new_timestamps = gtsam_unstable.FixedLagSmootherKeyTimestampMap()
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# Create a prior on the first pose, placing it at the origin
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prior_mean = gtsam.Pose2(0, 0, 0)
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prior_noise = gtsam.noiseModel_Diagonal.Sigmas(np.array([0.3, 0.3, 0.1]))
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X1 = 0
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new_factors.push_back(gtsam.PriorFactorPose2(X1, prior_mean, prior_noise))
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new_values.insert(X1, prior_mean)
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new_timestamps.insert(_timestamp_key_value(X1, 0.0))
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delta_time = 0.25
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time = 0.25
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while time <= 3.0:
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previous_key = 1000 * (time - delta_time)
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current_key = 1000 * time
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# assign current key to the current timestamp
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new_timestamps.insert(_timestamp_key_value(current_key, time))
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# Add a guess for this pose to the new values
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# Assume that the robot moves at 2 m/s. Position is time[s] * 2[m/s]
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current_pose = gtsam.Pose2(time * 2, 0, 0)
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new_values.insert(current_key, current_pose)
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# Add odometry factors from two different sources with different error
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# stats
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odometry_measurement_1 = gtsam.Pose2(0.61, -0.08, 0.02)
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odometry_noise_1 = gtsam.noiseModel_Diagonal.Sigmas(
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np.array([0.1, 0.1, 0.05]))
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new_factors.push_back(gtsam.BetweenFactorPose2(
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previous_key, current_key, odometry_measurement_1, odometry_noise_1
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))
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odometry_measurement_2 = gtsam.Pose2(0.47, 0.03, 0.01)
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odometry_noise_2 = gtsam.noiseModel_Diagonal.Sigmas(
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np.array([0.05, 0.05, 0.05]))
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new_factors.push_back(gtsam.BetweenFactorPose2(
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previous_key, current_key, odometry_measurement_2, odometry_noise_2
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))
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# Update the smoothers with the new factors. In this case,
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# one iteration must pass for Levenberg-Marquardt to accurately
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# estimate
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if time >= 0.50:
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smoother_batch.update(new_factors, new_values, new_timestamps)
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print("Timestamp = " + str(time) + ", Key = " + str(current_key))
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print(smoother_batch.calculateEstimatePose2(current_key))
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new_timestamps.clear()
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new_values.clear()
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new_factors.resize(0)
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time += delta_time
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if __name__ == '__main__':
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BatchFixedLagSmootherExample()
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print("Example complete")
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@ -0,0 +1,122 @@
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import unittest
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import gtsam
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import gtsam_unstable
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import numpy as np
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def _timestamp_key_value(key, value):
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return gtsam_unstable.FixedLagSmootherKeyTimestampMapValue(
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key, value
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)
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class TestFixedLagSmootherExample(unittest.TestCase):
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'''
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Tests the fixed lag smoother wrapper
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'''
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def test_FixedLagSmootherExample(self):
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'''
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Simple test that checks for equality between C++ example
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file and the Python implementation. See
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gtsam_unstable/examples/FixedLagSmootherExample.cpp
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'''
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# Define a batch fixed lag smoother, which uses
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# Levenberg-Marquardt to perform the nonlinear optimization
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lag = 2.0
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smoother_batch = gtsam_unstable.BatchFixedLagSmoother(lag)
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# Create containers to store the factors and linearization points
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# that will be sent to the smoothers
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new_factors = gtsam.NonlinearFactorGraph()
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new_values = gtsam.Values()
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new_timestamps = gtsam_unstable.FixedLagSmootherKeyTimestampMap()
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# Create a prior on the first pose, placing it at the origin
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prior_mean = gtsam.Pose2(0, 0, 0)
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prior_noise = gtsam.noiseModel_Diagonal.Sigmas(
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np.array([0.3, 0.3, 0.1]))
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X1 = 0
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new_factors.push_back(
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gtsam.PriorFactorPose2(
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X1, prior_mean, prior_noise))
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new_values.insert(X1, prior_mean)
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new_timestamps.insert(_timestamp_key_value(X1, 0.0))
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delta_time = 0.25
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time = 0.25
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i = 0
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ground_truth = [
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gtsam.Pose2(0.995821, 0.0231012, 0.0300001),
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gtsam.Pose2(1.49284, 0.0457247, 0.045),
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gtsam.Pose2(1.98981, 0.0758879, 0.06),
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gtsam.Pose2(2.48627, 0.113502, 0.075),
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gtsam.Pose2(2.98211, 0.158558, 0.09),
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gtsam.Pose2(3.47722, 0.211047, 0.105),
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gtsam.Pose2(3.97149, 0.270956, 0.12),
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gtsam.Pose2(4.4648, 0.338272, 0.135),
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gtsam.Pose2(4.95705, 0.41298, 0.15),
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gtsam.Pose2(5.44812, 0.495063, 0.165),
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gtsam.Pose2(5.9379, 0.584503, 0.18),
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]
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# Iterates from 0.25s to 3.0s, adding 0.25s each loop
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# In each iteration, the agent moves at a constant speed
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# and its two odometers measure the change. The smoothed
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# result is then compared to the ground truth
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while time <= 3.0:
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previous_key = 1000 * (time - delta_time)
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current_key = 1000 * time
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# assign current key to the current timestamp
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new_timestamps.insert(_timestamp_key_value(current_key, time))
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# Add a guess for this pose to the new values
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# Assume that the robot moves at 2 m/s. Position is time[s] *
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# 2[m/s]
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current_pose = gtsam.Pose2(time * 2, 0, 0)
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new_values.insert(current_key, current_pose)
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# Add odometry factors from two different sources with different
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# error stats
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odometry_measurement_1 = gtsam.Pose2(0.61, -0.08, 0.02)
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odometry_noise_1 = gtsam.noiseModel_Diagonal.Sigmas(
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np.array([0.1, 0.1, 0.05]))
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new_factors.push_back(
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gtsam.BetweenFactorPose2(
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previous_key,
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current_key,
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odometry_measurement_1,
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odometry_noise_1))
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odometry_measurement_2 = gtsam.Pose2(0.47, 0.03, 0.01)
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odometry_noise_2 = gtsam.noiseModel_Diagonal.Sigmas(
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np.array([0.05, 0.05, 0.05]))
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new_factors.push_back(
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gtsam.BetweenFactorPose2(
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previous_key,
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current_key,
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odometry_measurement_2,
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odometry_noise_2))
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# Update the smoothers with the new factors. In this case,
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# one iteration must pass for Levenberg-Marquardt to accurately
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# estimate
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if time >= 0.50:
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smoother_batch.update(new_factors, new_values, new_timestamps)
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estimate = smoother_batch.calculateEstimatePose2(current_key)
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self.assertTrue(estimate.equals(ground_truth[i], 1e-4))
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i += 1
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new_timestamps.clear()
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new_values.clear()
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new_factors.resize(0)
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time += delta_time
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if __name__ == "__main__":
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unittest.main()
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@ -111,7 +111,10 @@ int main(int argc, char** argv) {
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noiseModel::Diagonal::shared_ptr odometryNoise2 = noiseModel::Diagonal::Sigmas(Vector3(0.05, 0.05, 0.05));
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newFactors.push_back(BetweenFactor<Pose2>(previousKey, currentKey, odometryMeasurement2, odometryNoise2));
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// Update the smoothers with the new factors
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// Update the smoothers with the new factors. In this example, batch smoother needs one iteration
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// to accurately converge. The ISAM smoother doesn't, but we only start getting estiates when
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// both are ready for simplicity.
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if (time >= 0.50) {
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smootherBatch.update(newFactors, newValues, newTimestamps);
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smootherISAM2.update(newFactors, newValues, newTimestamps);
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for(size_t i = 1; i < 2; ++i) { // Optionally perform multiple iSAM2 iterations
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newValues.clear();
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newFactors.resize(0);
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}
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}
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// And to demonstrate the fixed-lag aspect, print the keys contained in each smoother after 3.0 seconds
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cout << "After 3.0 seconds, " << endl;
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//*************************************************************************
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// nonlinear
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//*************************************************************************
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// #include <gtsam_unstable/nonlinear/sequentialSummarization.h>
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// gtsam::GaussianFactorGraph* summarizeGraphSequential(
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// const gtsam::GaussianFactorGraph& full_graph, const gtsam::KeyVector& indices);
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// gtsam::GaussianFactorGraph* summarizeGraphSequential(
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// const gtsam::GaussianFactorGraph& full_graph, const gtsam::Ordering& ordering, const gtsam::KeySet& saved_keys);
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#include <gtsam_unstable/nonlinear/FixedLagSmoother.h>
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class FixedLagSmootherKeyTimestampMapValue {
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FixedLagSmootherKeyTimestampMapValue(size_t key, double timestamp);
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FixedLagSmootherKeyTimestampMapValue(const gtsam::FixedLagSmootherKeyTimestampMapValue& other);
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};
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// #include <gtsam_unstable/nonlinear/FixedLagSmoother.h>
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// class FixedLagSmootherKeyTimestampMapValue {
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// FixedLagSmootherKeyTimestampMapValue(const gtsam::Key& key, double timestamp);
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// FixedLagSmootherKeyTimestampMapValue(const gtsam::FixedLagSmootherKeyTimestampMapValue& other);
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// };
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//
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// class FixedLagSmootherKeyTimestampMap {
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// FixedLagSmootherKeyTimestampMap();
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// FixedLagSmootherKeyTimestampMap(const gtsam::FixedLagSmootherKeyTimestampMap& other);
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//
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// // Note: no print function
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//
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// // common STL methods
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// size_t size() const;
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// bool empty() const;
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// void clear();
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//
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// double at(const gtsam::Key& key) const;
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// void insert(const gtsam::FixedLagSmootherKeyTimestampMapValue& value);
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// };
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//
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// class FixedLagSmootherResult {
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// size_t getIterations() const;
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// size_t getNonlinearVariables() const;
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// size_t getLinearVariables() const;
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// double getError() const;
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// };
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//
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// #include <gtsam_unstable/nonlinear/FixedLagSmoother.h>
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// virtual class FixedLagSmoother {
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// void print(string s) const;
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// bool equals(const gtsam::FixedLagSmoother& rhs, double tol) const;
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//
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// gtsam::FixedLagSmootherKeyTimestampMap timestamps() const;
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// double smootherLag() const;
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//
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// gtsam::FixedLagSmootherResult update(const gtsam::NonlinearFactorGraph& newFactors, const gtsam::Values& newTheta, const gtsam::FixedLagSmootherKeyTimestampMap& timestamps);
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// gtsam::Values calculateEstimate() const;
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// };
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//
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// #include <gtsam_unstable/nonlinear/BatchFixedLagSmoother.h>
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// virtual class BatchFixedLagSmoother : gtsam::FixedLagSmoother {
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// BatchFixedLagSmoother();
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// BatchFixedLagSmoother(double smootherLag);
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// BatchFixedLagSmoother(double smootherLag, const gtsam::LevenbergMarquardtParams& params);
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//
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// gtsam::LevenbergMarquardtParams params() const;
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// };
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//
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// #include <gtsam_unstable/nonlinear/IncrementalFixedLagSmoother.h>
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// virtual class IncrementalFixedLagSmoother : gtsam::FixedLagSmoother {
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// IncrementalFixedLagSmoother();
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// IncrementalFixedLagSmoother(double smootherLag);
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// IncrementalFixedLagSmoother(double smootherLag, const gtsam::ISAM2Params& params);
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//
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// gtsam::ISAM2Params params() const;
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// };
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//
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// #include <gtsam_unstable/nonlinear/ConcurrentFilteringAndSmoothing.h>
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// virtual class ConcurrentFilter {
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// void print(string s) const;
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// bool equals(const gtsam::ConcurrentFilter& rhs, double tol) const;
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// };
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//
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// virtual class ConcurrentSmoother {
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// void print(string s) const;
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// bool equals(const gtsam::ConcurrentSmoother& rhs, double tol) const;
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// };
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//
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// // Synchronize function
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// void synchronize(gtsam::ConcurrentFilter& filter, gtsam::ConcurrentSmoother& smoother);
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//
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// #include <gtsam_unstable/nonlinear/ConcurrentBatchFilter.h>
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// class ConcurrentBatchFilterResult {
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// size_t getIterations() const;
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// size_t getLambdas() const;
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// size_t getNonlinearVariables() const;
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// size_t getLinearVariables() const;
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// double getError() const;
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// };
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//
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// virtual class ConcurrentBatchFilter : gtsam::ConcurrentFilter {
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// ConcurrentBatchFilter();
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// ConcurrentBatchFilter(const gtsam::LevenbergMarquardtParams& parameters);
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//
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// gtsam::NonlinearFactorGraph getFactors() const;
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// gtsam::Values getLinearizationPoint() const;
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// gtsam::Ordering getOrdering() const;
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// gtsam::VectorValues getDelta() const;
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//
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// gtsam::ConcurrentBatchFilterResult update();
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// gtsam::ConcurrentBatchFilterResult update(const gtsam::NonlinearFactorGraph& newFactors);
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// gtsam::ConcurrentBatchFilterResult update(const gtsam::NonlinearFactorGraph& newFactors, const gtsam::Values& newTheta);
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// gtsam::ConcurrentBatchFilterResult update(const gtsam::NonlinearFactorGraph& newFactors, const gtsam::Values& newTheta, const gtsam::KeyList& keysToMove);
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// gtsam::Values calculateEstimate() const;
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// };
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//
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// #include <gtsam_unstable/nonlinear/ConcurrentBatchSmoother.h>
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// class ConcurrentBatchSmootherResult {
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// size_t getIterations() const;
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// size_t getLambdas() const;
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// size_t getNonlinearVariables() const;
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// size_t getLinearVariables() const;
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// double getError() const;
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// };
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//
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// virtual class ConcurrentBatchSmoother : gtsam::ConcurrentSmoother {
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// ConcurrentBatchSmoother();
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// ConcurrentBatchSmoother(const gtsam::LevenbergMarquardtParams& parameters);
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//
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// gtsam::NonlinearFactorGraph getFactors() const;
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// gtsam::Values getLinearizationPoint() const;
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// gtsam::Ordering getOrdering() const;
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// gtsam::VectorValues getDelta() const;
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//
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// gtsam::ConcurrentBatchSmootherResult update();
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// gtsam::ConcurrentBatchSmootherResult update(const gtsam::NonlinearFactorGraph& newFactors);
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// gtsam::ConcurrentBatchSmootherResult update(const gtsam::NonlinearFactorGraph& newFactors, const gtsam::Values& newTheta);
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// gtsam::Values calculateEstimate() const;
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// };
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class FixedLagSmootherKeyTimestampMap {
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FixedLagSmootherKeyTimestampMap();
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FixedLagSmootherKeyTimestampMap(const gtsam::FixedLagSmootherKeyTimestampMap& other);
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// Note: no print function
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// common STL methods
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size_t size() const;
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bool empty() const;
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void clear();
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double at(const size_t key) const;
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void insert(const gtsam::FixedLagSmootherKeyTimestampMapValue& value);
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};
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class FixedLagSmootherResult {
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size_t getIterations() const;
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size_t getNonlinearVariables() const;
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size_t getLinearVariables() const;
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double getError() const;
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};
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#include <gtsam_unstable/nonlinear/FixedLagSmoother.h>
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virtual class FixedLagSmoother {
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void print(string s) const;
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bool equals(const gtsam::FixedLagSmoother& rhs, double tol) const;
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gtsam::FixedLagSmootherKeyTimestampMap timestamps() const;
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double smootherLag() const;
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gtsam::FixedLagSmootherResult update(const gtsam::NonlinearFactorGraph& newFactors, const gtsam::Values& newTheta, const gtsam::FixedLagSmootherKeyTimestampMap& timestamps);
|
||||
gtsam::Values calculateEstimate() const;
|
||||
};
|
||||
|
||||
#include <gtsam_unstable/nonlinear/BatchFixedLagSmoother.h>
|
||||
virtual class BatchFixedLagSmoother : gtsam::FixedLagSmoother {
|
||||
BatchFixedLagSmoother();
|
||||
BatchFixedLagSmoother(double smootherLag);
|
||||
BatchFixedLagSmoother(double smootherLag, const gtsam::LevenbergMarquardtParams& params);
|
||||
|
||||
gtsam::LevenbergMarquardtParams params() const;
|
||||
template <VALUE = {gtsam::Point2, gtsam::Rot2, gtsam::Pose2, gtsam::Point3,
|
||||
gtsam::Rot3, gtsam::Pose3, gtsam::Cal3_S2, gtsam::Cal3DS2,
|
||||
Vector, Matrix}>
|
||||
VALUE calculateEstimate(size_t key) const;
|
||||
};
|
||||
|
||||
#include <gtsam_unstable/nonlinear/IncrementalFixedLagSmoother.h>
|
||||
virtual class IncrementalFixedLagSmoother : gtsam::FixedLagSmoother {
|
||||
IncrementalFixedLagSmoother();
|
||||
IncrementalFixedLagSmoother(double smootherLag);
|
||||
IncrementalFixedLagSmoother(double smootherLag, const gtsam::ISAM2Params& params);
|
||||
|
||||
gtsam::ISAM2Params params() const;
|
||||
};
|
||||
|
||||
#include <gtsam_unstable/nonlinear/ConcurrentFilteringAndSmoothing.h>
|
||||
virtual class ConcurrentFilter {
|
||||
void print(string s) const;
|
||||
bool equals(const gtsam::ConcurrentFilter& rhs, double tol) const;
|
||||
};
|
||||
|
||||
virtual class ConcurrentSmoother {
|
||||
void print(string s) const;
|
||||
bool equals(const gtsam::ConcurrentSmoother& rhs, double tol) const;
|
||||
};
|
||||
|
||||
// Synchronize function
|
||||
void synchronize(gtsam::ConcurrentFilter& filter, gtsam::ConcurrentSmoother& smoother);
|
||||
|
||||
#include <gtsam_unstable/nonlinear/ConcurrentBatchFilter.h>
|
||||
class ConcurrentBatchFilterResult {
|
||||
size_t getIterations() const;
|
||||
size_t getLambdas() const;
|
||||
size_t getNonlinearVariables() const;
|
||||
size_t getLinearVariables() const;
|
||||
double getError() const;
|
||||
};
|
||||
|
||||
virtual class ConcurrentBatchFilter : gtsam::ConcurrentFilter {
|
||||
ConcurrentBatchFilter();
|
||||
ConcurrentBatchFilter(const gtsam::LevenbergMarquardtParams& parameters);
|
||||
|
||||
gtsam::NonlinearFactorGraph getFactors() const;
|
||||
gtsam::Values getLinearizationPoint() const;
|
||||
gtsam::Ordering getOrdering() const;
|
||||
gtsam::VectorValues getDelta() const;
|
||||
|
||||
gtsam::ConcurrentBatchFilterResult update();
|
||||
gtsam::ConcurrentBatchFilterResult update(const gtsam::NonlinearFactorGraph& newFactors);
|
||||
gtsam::ConcurrentBatchFilterResult update(const gtsam::NonlinearFactorGraph& newFactors, const gtsam::Values& newTheta);
|
||||
gtsam::ConcurrentBatchFilterResult update(const gtsam::NonlinearFactorGraph& newFactors, const gtsam::Values& newTheta, const gtsam::KeyList& keysToMove);
|
||||
gtsam::Values calculateEstimate() const;
|
||||
};
|
||||
|
||||
#include <gtsam_unstable/nonlinear/ConcurrentBatchSmoother.h>
|
||||
class ConcurrentBatchSmootherResult {
|
||||
size_t getIterations() const;
|
||||
size_t getLambdas() const;
|
||||
size_t getNonlinearVariables() const;
|
||||
size_t getLinearVariables() const;
|
||||
double getError() const;
|
||||
};
|
||||
|
||||
virtual class ConcurrentBatchSmoother : gtsam::ConcurrentSmoother {
|
||||
ConcurrentBatchSmoother();
|
||||
ConcurrentBatchSmoother(const gtsam::LevenbergMarquardtParams& parameters);
|
||||
|
||||
gtsam::NonlinearFactorGraph getFactors() const;
|
||||
gtsam::Values getLinearizationPoint() const;
|
||||
gtsam::Ordering getOrdering() const;
|
||||
gtsam::VectorValues getDelta() const;
|
||||
|
||||
gtsam::ConcurrentBatchSmootherResult update();
|
||||
gtsam::ConcurrentBatchSmootherResult update(const gtsam::NonlinearFactorGraph& newFactors);
|
||||
gtsam::ConcurrentBatchSmootherResult update(const gtsam::NonlinearFactorGraph& newFactors, const gtsam::Values& newTheta);
|
||||
gtsam::Values calculateEstimate() const;
|
||||
};
|
||||
|
||||
//*************************************************************************
|
||||
// slam
|
||||
|
|
|
|||
Loading…
Reference in New Issue