COMPUTER-VISION2026-04-14

OVAL: Open-Vocabulary Augmented Memory Model for Lifelong Object Goal Navigation

Jiahua Pei, Yi Liu, Guoping Pan, Yuanhao Jiang, Houde Liu, Xueqian Wang

This paper addresses a practical robotics problem: enabling a Core ConceptsRobotA physical system with sensors and actuators that can observe the world and take actions. to continuously navigate toward different objects in new environments while building and maintaining memories of previously seen objects. Unlike existing approaches that handle one object at a time, OVAL maintains a persistent memory system that learns about objects over time, allowing robots to become better at finding things as they accumulate experience. The Modern Robot LearningOpen-vocabularyThe ability to understand names or categories beyond a fixed label set. aspect means the Core ConceptsRobotA physical system with sensors and actuators that can observe the world and take actions. can understand and search for objects using natural language descriptions it hasn't seen before. For developers, this means building Navigation & LocomotionNavigationMoving through an environment toward a goal. systems that improve with experience rather than resetting for each new Core ConceptsTaskThe job the robot is supposed to complete, such as pick-and-place, navigation, or drawer opening..

THE PROBLEM

This paper focuses on computer vision. This paper addresses a practical robotics problem: enabling a Core ConceptsRobotA physical system with sensors and actuators that can observe the world and take actions. to continuously navigate toward different objects in new environments while building and maintaining memories of previously seen objects. Unlike existing approaches that handle one object at a time, OVAL maintains a persistent memory system that learns about objects over time, allowing robots to become better at finding things as they accumulate experience. The Modern Robot LearningOpen-vocabularyThe ability to understand names or categories beyond a fixed label set. aspect means the Core ConceptsRobotA physical system with sensors and actuators that can observe the world and take actions. can understand and search for objects using natural language descriptions it hasn't seen before. For developers, this means building Navigation & LocomotionNavigationMoving through an environment toward a goal. systems that improve with experience rather than resetting for each new Core ConceptsTaskThe job the robot is supposed to complete, such as pick-and-place, navigation, or drawer opening.. Read the paper by tracking the Core ConceptsTaskThe job the robot is supposed to complete, such as pick-and-place, navigation, or drawer opening. definition, the Core ConceptsRobotA physical system with sensors and actuators that can observe the world and take actions. or data assumptions, and the evidence that supports the claimed improvement.

HOW IT WORKS

1

Task framing

The paper frames the work as computer vision. Start here because it defines what success means and which assumptions the rest of the method inherits.

2

Core method

This paper addresses a practical robotics problem: enabling a Core ConceptsRobotA physical system with sensors and actuators that can observe the world and take actions. to continuously navigate toward different objects in new environments while building and maintaining memories of previously seen objects. Unlike existing approaches that handle one object at a time, OVAL maintains a persistent memory system that learns about objects over time, allowing robots to become better at finding things as they accumulate experience. The Modern Robot LearningOpen-vocabularyThe ability to understand names or categories beyond a fixed label set. aspect means the Core ConceptsRobotA physical system with sensors and actuators that can observe the world and take actions. can understand and search for objects using natural language descriptions it hasn't seen before. For developers, this means building Navigation & LocomotionNavigationMoving through an environment toward a goal. systems that improve with experience rather than resetting for each new Core ConceptsTaskThe job the robot is supposed to complete, such as pick-and-place, navigation, or drawer opening.. When reading the method section, identify the inputs, the learned or engineered representation, and the Core ConceptsActionA command the robot sends to its motors, controller, or low-level system. or prediction produced by the system.

3

Data and supervision

For robotics work, the data story is part of the method: check whether the system depends on Imitation & Reinforcement LearningTeleoperation (teleop)A human remotely controlling the robot, often to collect demonstrations., Simulation & Sim-to-RealSimulationA virtual environment where robots can be trained or tested., internet video, human labels, or Core ConceptsRobotA physical system with sensors and actuators that can observe the world and take actions. rollouts.

4

Evaluation evidence

The paper should be judged through its Simulation & Sim-to-RealEvaluationMeasuring how well a robot system performs. protocol: what data is used, what Core ConceptsRobotA physical system with sensors and actuators that can observe the world and take actions. or simulator is tested, and which Evaluation & ResearchBaselineA reference method used for comparison. comparisons support the claim. Look for the gap between the headline result and the Simulation & Sim-to-RealDeploymentPutting the trained system on a real robot. setting you would actually care about.

KEY RESULTS

Main contributionConceptual contribution

This paper addresses a practical robotics problem: enabling a Core ConceptsRobotA physical system with sensors and actuators that can observe the world and take actions. to continuously navigate toward different objects in new environments while building and maintaining memories of previously seen objects. Unlike existing approaches that handle one object at a time, OVAL maintains a persistent memory system that learns about objects over time, allowing robots to become better at finding things as they accumulate experience. The Modern Robot LearningOpen-vocabularyThe ability to understand names or categories beyond a fixed label set. aspect means the Core ConceptsRobotA physical system with sensors and actuators that can observe the world and take actions. can understand and search for objects using natural language descriptions it hasn't seen before. For developers, this means building Navigation & LocomotionNavigationMoving through an environment toward a goal. systems that improve with experience rather than resetting for each new Core ConceptsTaskThe job the robot is supposed to complete, such as pick-and-place, navigation, or drawer opening..

WHY DEVELOPERS SHOULD CARE

This paper addresses a practical robotics problem: enabling a Core ConceptsRobotA physical system with sensors and actuators that can observe the world and take actions. to continuously navigate toward different objects in new environments while building and maintaining memories of previously seen objects. Unlike existing approaches that handle one object at a time, OVAL maintains a persistent memory system that learns about objects over time, allowing robots to become better at finding things as they accumulate experience. The Modern Robot LearningOpen-vocabularyThe ability to understand names or categories beyond a fixed label set. aspect means the Core ConceptsRobotA physical system with sensors and actuators that can observe the world and take actions. can understand and search for objects using natural language descriptions it hasn't seen before. For developers, this means building Navigation & LocomotionNavigationMoving through an environment toward a goal. systems that improve with experience rather than resetting for each new Core ConceptsTaskThe job the robot is supposed to complete, such as pick-and-place, navigation, or drawer opening..

LIMITATIONS

The main limitation to check is whether the claimed behavior holds outside the paper's reported setup. That means testing across different Core ConceptsRobotA physical system with sensors and actuators that can observe the world and take actions. embodiments, scenes, objects, and data distributions.

WHAT COMES NEXT

The practical next step is independent reproduction with clear baselines, ablations, and stress tests. For a developer, the useful follow-up is to map the paper's computer vision assumptions onto a concrete Core ConceptsRobotA physical system with sensors and actuators that can observe the world and take actions. stack, then test the smallest version of the method that could run end to end.

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