Abstract
We propose a deep semantic characterisation of space and motion categorically from the viewpoint of grounding embodied human-object interactions. Our key focus is on an ontological model that would be adept to formalisation from the viewpoint of commonsense knowledge representation, relational learning, and qualitative reasoning about space and motion in cognitive robotics settings. We demonstrate key aspects of the space & motion ontology and its formalisation as a representational framework in the backdrop of select examples from a dataset of everyday activities. Furthermore, focussing on human-object interaction data obtained from RGBD sensors, we also illustrate how declarative (spatio-temporal) reasoning in the (constraint) logic programming family may be performed with the developed deep semantic abstractions.
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Notes
- 1.
Multi-modal in this context refers to more than one aspect of space, e.g., topology, orientation, direction, distance, shape. Multi-domain denotes a mixed domain ontology involving points, line-segments, polygons, and regions of space, time, and space-time [23].
- 2.
RGB-D Data (video, depth, body skeleton): We collect data using Microsoft Kinect v2 which provides RGB and depth data. The RGB stream has a resolution of 1920 \(\times \) 1080 pixel at 30 Hz and the depth sensor has a resolution of 512 \(\times \) 424 pixels at 30 Hz. Skeleton tracking can track up to 6 persons with 25 joints for each person. Further we use the point-cloud data to detect objects on the table using tabletop object segmentation.
- 3.
ExpCog – http://www.commonsenserobotics.org
openEASE – http://ease.informatik.uni-bremen.de/openease/.
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Acknowledgements
We acknowledge funding by the Germany Research Foundation (DFG) via the Collaborative Research Center (CRC) EASE – Everyday Activity Science and Engineering (http://ease-crc.org). This paper builds on, and is a condensed version of, a workshop contribution [31] at the ICCV 2017 conference. We also acknowledge the support of Vijayanta Jain in preparation of part of the overall activity dataset; toward this, the help of Omar Moussa, Hubert Kloskoski, Thomas Hudkovic, Vyyom Kelkar as subjects is acknowledged.
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Suchan, J., Bhatt, M. (2018). Deep Semantic Abstractions of Everyday Human Activities. In: Ollero, A., Sanfeliu, A., Montano, L., Lau, N., Cardeira, C. (eds) ROBOT 2017: Third Iberian Robotics Conference. ROBOT 2017. Advances in Intelligent Systems and Computing, vol 693. Springer, Cham. https://doi.org/10.1007/978-3-319-70833-1_39
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