A model of visual detection of angular speed for bees

Riabinina, Olena and Philippides, Andrew O. (2009) A model of visual detection of angular speed for bees. Journal of Theoretical Biology, 257 (1). pp. 61-72. ISSN 0022-5193

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A fly or bee's responses to widefield image motion depend on two basic parameters: temporal frequency and angular speed. Rotational optic flow is monitored using temporal frequency analysers, whereas translational optic flow seems to be monitored in terms of angular speed. Here we present a possible model of an angular speed detector which processes input signals through two parallel channels. The output of the detector is taken as the ratio of the two channels' outputs. This operation amplifies angular speed sensitivity and depresses temporal frequency tuning. We analyse the behaviour of two versions of this model with different filtering properties in response to a variety of input signals. We then embody the detector in a simulated agent's visual system and explore its behaviour in experiments on speed control and odometry. The latter leads us to suggest a new algorithm for optic flow driven odometry.

Item Type: Article
Schools and Departments: School of Engineering and Informatics > Informatics
Depositing User: Andy Philippides
Date Deposited: 06 Feb 2012 19:51
Last Modified: 12 Apr 2012 13:09
URI: http://sro.sussex.ac.uk/id/eprint/22589
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