Real-time obstacle avoidance for manipulators and mobile robots
International Journal of Robotics Research
Adaptive Behavior - Special issue on biologically inspired models of navigation
A Dynamical Model of Visually-Guided Steering, Obstacle Avoidance, and Route Selection
International Journal of Computer Vision - Special Issue on Computational Vision at Brown University
The utility of not changing direction and the visual guidance of locomotion
Optic flow and beyond
Obstacle avoidance during walking in real and virtual environments
ACM Transactions on Applied Perception (TAP)
Modeling locomotor control: The advantages of mobile gaze
ACM Transactions on Applied Perception (TAP)
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In this paper we describe the motivation, design and implementation of a system to visually guide a locomoting robot towards a target and around obstacles. The work was inspired by a recent suggestion that walking humans rely on perceived egocentric direction rather than optic flow to guide locomotion to a target. We briefly summarise the human experimental work and then illustrate how direction based heuristics can be used in the visual guidance of locomotion. We also identify perceptual variables that could be used in the detection of obstacles and a control law for the regulation of obstacle avoidance. We describe simulations that demonstrate the utility of the approach and the implementation of these control laws on a Nomad mobile robot. We conclude that our simple biologically inspired solution produces robust behaviour and proves a very promising approach.