Interactive robotic grasping using natural language is one of the most fundamental tasks in human-robot interaction. However, language can be a source of ambiguity, particularly when there are ambiguous visual or linguistic contents. This paper investigates the use of object attributes in disambiguation and develops an interactive grasping system capable of effectively resolving ambiguities via dialogues. Our approach first predicts target scores and attribute scores through vision-and-language grounding. To handle ambiguous objects and commands, we propose an attribute-guided formulation of the partially observable Markov decision process (Attr-POMDP) for disambiguation. The Attr-POMDP utilizes target and attribute scores as the observation model to calculate the expected return of an attribute-based (e.g., 'what is the color of the target, red or green?') or a pointing-based (e.g., 'do you mean this one?') question. Our disambiguation module runs in real time on a real robot, and the interactive grasping system achieves a 91.43 % selection accuracy in the real-robot experiments, outperforming several baselines by large margins. Supplementary material is available at https://sites.google.com/umn.eduJattr-disam.
|Original language||English (US)|
|Title of host publication||2022 IEEE International Conference on Robotics and Automation, ICRA 2022|
|Publisher||Institute of Electrical and Electronics Engineers Inc.|
|Number of pages||7|
|State||Published - 2022|
|Event||39th IEEE International Conference on Robotics and Automation, ICRA 2022 - Philadelphia, United States|
Duration: May 23 2022 → May 27 2022
|Name||2022 International Conference on Robotics and Automation (ICRA)|
|Conference||39th IEEE International Conference on Robotics and Automation, ICRA 2022|
|Period||5/23/22 → 5/27/22|
Bibliographical noteFunding Information:
*This work was supported by UMII MnDRIVE Ph.D. Graduate Assistantship and MnDRIVE Initiative on Robotics, Sensors, and Advanced Manufacturing. †The authors are with University of Minnesota, Minneapolis, USA
© 2022 IEEE.
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