SpCoSLAM

Implementation of SpCoSLAM (Online Spatial Concept and Lexical Acquisition with Simultaneous Localization and Mapping)
This repository includes the source codes used for the experiments in our paper on IROS 2017.

Current repositories

[NEW!] SpCoSLAM 2.0: An Improved and Scalable Online Learning of Spatial Concepts and Language Models with Mapping (New version of online learning algorithm)

Other repositories
SpCoSLAM_Lets: ROS Wrapper of SpCoSLAM for real mobile robots
SpCoSLAM_evaluation: The codes for the evaluation or the visualization in our paper

Abstract of SpCoSLAM

We propose an online learning algorithm based on a Rao-Blackwellized particle filter for spatial concept acquisition and mapping. We have proposed a nonparametric Bayesian spatial concept acquisition model (SpCoA). We propose a novel method (SpCoSLAM) integrating SpCoA and FastSLAM in the theoretical framework of the Bayesian generative model. The proposed method can simultaneously learn place categories and lexicons while incrementally generating an environmental map.

Figure: The graphical model of SpCoSLAM

Execution environment

• Ubuntu 14.04
• Python 2.7.6
• ROS indigo
• CNN feature extracter: Caffe (Reference model: Places-205)
• Speech recognition system: Julius dictation-kit-v4.3.1-linux (Using Japanese syllabary dictionary, lattice output)
• If you perform the lexical acquisition (unsupervised word segmentaiton): latticelm 0.4 and OpenFST

In our paper of IROS2017, we used a rosbag file of open-dataset albert-B-laser-vision-dataset.

Preparation for execution

• Path specification of training dataset, matching ros topic name etc (__init__.py and run_gmapping.sh)
• Create a file that stores the teaching time from the time information of the training dataset
• Prepare speech data files. Specify the file path in __init__.py
• Start CNN_place.py before running the learning program
  Create a folder for files of image features
• To specify the number of particles, you need to change both __ init__.py and run_gmapping.sh
• Change the path of the folder name in /catkin_ws/src/openslam_gmapping/gridfastslam/gridslamprocessor.cpp
  We changed this file only.
  [Note] If the original gmapping has already been installed on your PC, you need to change the uninstallation or path setting of gmapping.

Execution procedure

cd ~/SpCoSLAM/learning
./SpCoSLAM.sh
->trialname?(output_folder) >output_folder_name

Notes

• Sometimes gflag-related errors sometimes appear in run_rosbag.py. It is due to file reading failure. It will reload and it will work so it will not be a problem.

• On low spec PCs, processing of gmapping can not catch up and maps can not be done well.

• This repository contains gmapping. The following files of ./catkin_ws/src/ folder follow the license of the original version of gmapping (License: CreativeCommons-by-nc-sa-2.0).

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If you use this program to publish something, please describe the following citation information.

Reference:
Akira Taniguchi, Yoshinobu Hagiwara, Tadahiro Taniguchi, and Tetsunari Inamura, "Online Spatial Concept and Lexical Acquisition with Simultaneous Localization and Mapping", IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS2017), 2017.

Original paper: https://arxiv.org/abs/1704.04664

Sample video: https://youtu.be/z73iqwKL-Qk

2018/01/15 Akira Taniguchi
2018/04/24 Akira Taniguchi (Update)
2018/11/26 Akira Taniguchi (Update)