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Lookup NU author(s): Professor Jenny ReadORCiD
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
Stereopsis has traditionally been considered a complex visual ability, restricted to large-brained animals. The discovery in the 1980s that insects, too, have stereopsis, therefore, challenged theories of stereopsis. How can such simple brains see in three dimensions? A likely answer is that insect stereopsis has evolved to produce simple behaviour, such as orienting towards the closer of two objects or triggering a strike when prey comes within range. Scientific thinking about stereopsis has been unduly anthropomorphic, for example assuming that stereopsis must require binocular fusion or a solution of the stereo correspondence problem. In fact, useful behaviour can be produced with very basic stereoscopic algorithms which make no attempt to achieve fusion or correspondence, or to produce even a coarse map of depth across the visual field. This may explain why some aspects of insect stereopsis seem poorly designed from an engineering point of view: for example, paying no attention to whether interocular contrast or velocities match. Such algorithms demonstrably work well enough in practice for their species, and may prove useful in particular autonomous applications. This article is part of a discussion meeting issue 'New approaches to 3D vision'.
Author(s): Read JCA
Publication type: Article
Publication status: Published
Journal: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
Year: 2023
Volume: 378
Issue: 1869
Print publication date: 30/01/2023
Online publication date: 13/12/2022
Acceptance date: 30/06/2022
Date deposited: 04/01/2023
ISSN (print): 0962-8436
ISSN (electronic): 1471-2970
Publisher: Royal Society Publishing
URL: https://doi.org/10.1098/rstb.2021.0449
DOI: 10.1098/rstb.2021.0449
PubMed id: 36511401
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