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  4. A small-scale hyperacute compound eye featuring active eye tremor: application to visual stabilization, target tracking, and short-range odometry
 
research article

A small-scale hyperacute compound eye featuring active eye tremor: application to visual stabilization, target tracking, and short-range odometry

Colonnier, Fabien
•
Manecy, Augustin
•
Juston, Raphael
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2015
Bioinspiration & Biomimetics

In this study, a miniature artificial compound eye (15 mm in diameter) called the curved artificial compound eye (CurvACE) was endowed for the first time with hyperacuity, using similar micro-movements to those occurring in the fly's compound eye. A periodic micro-scanning movement of only a few degrees enables the vibrating compound eye to locate contrasting objects with a 40-fold greater resolution than that imposed by the interommatidial angle. In this study, we developed a new algorithm merging the output of 35 local processing units consisting of adjacent pairs of artificial ommatidia. The local measurements performed by each pair are processed in parallel with very few computational resources, which makes it possible to reach a high refresh rate of 500 Hz. An aerial robotic platform with two degrees of freedom equipped with the active CurvACE placed over naturally textured panels was able to assess its linear position accurately with respect to the environment thanks to its efficient gaze stabilization system. The algorithm was found to perform robustly at different light conditions as well as distance variations relative to the ground and featured small closed-loop positioning errors of the robot in the range of 45 mm. In addition, three tasks of interest were performed without having to change the algorithm: short-range odometry, visual stabilization, and tracking contrasting objects (hands) moving over a textured background.

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Type
research article
DOI
10.1088/1748-3190/10/2/026002
Web of Science ID

WOS:000352505700010

Author(s)
Colonnier, Fabien
Manecy, Augustin
Juston, Raphael
Mallot, Hanspeter
Leitel, Robert
Floreano, Dario  
Viollet, Stephane
Date Issued

2015

Publisher

Iop Publishing Ltd

Published in
Bioinspiration & Biomimetics
Volume

10

Issue

2

Article Number

026002

Subjects

Soft Robotics

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LIS  
Available on Infoscience
May 29, 2015
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/114339
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