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Concept-Guided Exploration: Building Persistent, Actionable Scene Graphs

arXiv:2608.23650v1 Announce Type: new Abstract: The perception of 3D space by mobile robots is rapidly moving from flat metric grid representations to hybrid metric-semantic graphs built from human-interpretable concepts. While most approaches first build metric maps and then add semantic layers, we explore an alternative, concept-first architecture in which spatial understanding emerges from asynchronous concept agents that directly instantiate and manage semantic entities. Our robot employs two spatial concepts (room and door), implemented as autonomous processes within a cognitive distributed architecture. These concept agents cooperatively build a shared scene graph representation of indoor layouts through active exploration and incremental validation. The key architectural principle is hierarchical constraint propagation: Room instantiation provides geometric and semantic priors to guide and support door detection within wall boundaries. The resulting structure is maintained by a complementary functional principle based on prediction-matching loops. This approach is designed to yield an actionable, human-interpretable spatial representation without relying on any pre-existing global metric map, supporting scalable operation and persistent, task-relevant understanding in structured indoor environments.

SourcearXiv RoboticsAuthor: No\'e Zapata, Gerardo P\'erez, Alejandro Torrej\'on, Pedro N\'u\~nez, Pablo Bustos

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[Submitted on 24 Aug 2026]

Title:Concept-Guided Exploration: Building Persistent, Actionable Scene Graphs

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Abstract:The perception of 3D space by mobile robots is rapidly moving from flat metric grid representations to hybrid metric-semantic graphs built from human-interpretable concepts. While most approaches first build metric maps and then add semantic layers, we explore an alternative, concept-first architecture in which spatial understanding emerges from asynchronous concept agents that directly instantiate and manage semantic entities. Our robot employs two spatial concepts (room and door), implemented as autonomous processes within a cognitive distributed architecture. These concept agents cooperatively build a shared scene graph representation of indoor layouts through active exploration and incremental validation. The key architectural principle is hierarchical constraint propagation: Room instantiation provides geometric and semantic priors to guide and support door detection within wall boundaries. The resulting structure is maintained by a complementary functional principle based on prediction-matching loops. This approach is designed to yield an actionable, human-interpretable spatial representation without relying on any pre-existing global metric map, supporting scalable operation and persistent, task-relevant understanding in structured indoor environments.

Subjects:

Robotics (cs.RO)

Cite as: arXiv:2608.23650 [cs.RO]

(or arXiv:2608.23650v1 [cs.RO] for this version)

https://doi.org/10.48550/arXiv.2608.23650

arXiv-issued DOI via DataCite

Journal reference: Applied Sciences 2025, 15, 11084

Related DOI:

https://doi.org/10.3390/app152011084

DOI(s) linking to related resources

Submission history

From: Pablo Bustos [view email] [v1] Mon, 24 Aug 2026 10:08:48 UTC (9,784 KB)

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