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Active Visual Object Search in Unknown Environments Using Uncertain Semantics
KTH, School of Computer Science and Communication (CSC), Centres, Centre for Autonomous Systems, CAS.
KTH, School of Computer Science and Communication (CSC), Centres, Centre for Autonomous Systems, CAS.ORCID iD: 0000-0002-1396-0102
KTH, School of Computer Science and Communication (CSC), Computer Vision and Active Perception, CVAP. KTH, School of Computer Science and Communication (CSC), Centres, Centre for Autonomous Systems, CAS.ORCID iD: 0000-0002-1170-7162
2013 (English)In: IEEE Transactions on robotics, ISSN 1552-3098, E-ISSN 1941-0468, Vol. 29, no 4, 986-1002 p.Article in journal (Refereed) Published
Abstract [en]

In this paper, we study the problem of active visual search (AVS) in large, unknown, or partially known environments. We argue that by making use of uncertain semantics of the environment, a robot tasked with finding an object can devise efficient search strategies that can locate everyday objects at the scale of an entire building floor, which is previously unknown to the robot. To realize this, we present a probabilistic model of the search environment, which allows for prioritizing the search effort to those parts of the environment that are most promising for a specific object type. Further, we describe a method for reasoning about the unexplored part of the environment for goal-directed exploration with the purpose of object search. We demonstrate the validity of our approach by comparing it with two other search systems in terms of search trajectory length and time. First, we implement a greedy coverage-based search strategy that is found in previous work. Second, we let human participants search for objects as an alternative comparison for our method. Our results show that AVS strategies that exploit uncertain semantics of the environment are a very promising idea, and our method pushes the state-of-the-art forward in AVS.

Place, publisher, year, edition, pages
2013. Vol. 29, no 4, 986-1002 p.
Keyword [en]
Active vision, semantic mapping, visual object search
National Category
Robotics
Identifiers
URN: urn:nbn:se:kth:diva-127759DOI: 10.1109/TRO.2013.2256686ISI: 000322836600014Scopus ID: 2-s2.0-84882315603OAI: oai:DiVA.org:kth-127759DiVA: diva2:646027
Note

QC 20130906

Available from: 2013-09-06 Created: 2013-09-05 Last updated: 2017-12-06Bibliographically approved

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Pronobis, AndrzejJensfelt, Patric

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