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A bio-inspired electric camera for short-range object inspection in murky waters
Martin Gottwald1, Hendrik Herzog, Gerhard von der Emde
1Department Neuroethology/Sensory Ecology, Institute of Zoology, University of Bonn, 53115 Bonn, Germany.
Bioinspiration & Biomimetics
|April 9, 2019
Summary
A novel electric camera, inspired by weakly electric fish, enables reliable underwater object inspection in murky conditions. This biomimetic device captures
Area of Science:
- Biomimetics and Sensor Technology
- Neuroethology and Sensory Ecology
Background:
- Optical sensors struggle with underwater object inspection in turbid or dark environments.
- Weakly electric fish, like Gnathonemus petersii, utilize active electrolocation for navigation and object detection.
Purpose of the Study:
- To design and evaluate a biomimetic electric camera for underwater object inspection.
- To mimic the electrolocation principles of Gnathonemus petersii for enhanced sensing capabilities.
Main Methods:
- Developed a biomimetic 'electric camera' that probes objects with a weak electric field.
- Captured 'electric images' by processing object-evoked field modulations.
- Analyzed image blurring, 'electric colors', and 'electric outlines' for object characterization.
Main Results:
- The electric camera produced images similar to those perceived by Gnathonemus petersii.
- Objects were reliably analyzed based on extracted fish analytical cues.
- Distances, sizes, and materials of spheres were estimated using 'image blurring'.
- Natural targets (fish, plants) were identified by unique 'electric colors'.
- An 'electric outline' cue provided contour information.
Conclusions:
- Bio-inspired electric imaging offers promising solutions for short-range object inspection in challenging aquatic environments.
- The device facilitates 'reverse biomimetics', uncovering new insights into weakly electric fish sensory perception.
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