Quantifying navigational information: The catchment volumes of panoramic snapshots in outdoor scenes

PloS One
Trevor Murray, Jochen Zeil

Abstract

Panoramic views of natural environments provide visually navigating animals with two kinds of information: they define locations because image differences increase smoothly with distance from a reference location and they provide compass information, because image differences increase smoothly with rotation away from a reference orientation. The range over which a given reference image can provide navigational guidance (its 'catchment area') has to date been quantified from the perspective of walking animals by determining how image differences develop across the ground plane of natural habitats. However, to understand the information available to flying animals there is a need to characterize the 'catchment volumes' within which panoramic snapshots can provide navigational guidance. We used recently developed camera-based methods for constructing 3D models of natural environments and rendered panoramic views at defined locations within these models with the aim of mapping navigational information in three dimensions. We find that in relatively open woodland habitats, catchment volumes are surprisingly large extending for metres depending on the sensitivity of the viewer to image differences. The size and the shape of catchment...Continue Reading

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Citations

Jan 29, 2019·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Cody A Freas, Marcia L Spetch
Aug 22, 2018·The Journal of Experimental Biology·Piyankarie JayatilakaJochen Zeil
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May 16, 2019·The Journal of Experimental Biology·Cody A Freas, Ken Cheng
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Mar 10, 2018·PloS One·Martin M MüllerMartin Egelhaaf
Nov 27, 2020·Frontiers in Behavioral Neuroscience·Zoltán KócsiJochen Zeil
Oct 13, 2021·Annual Review of Psychology·Cody A Freas, Ken Cheng

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Software Mentioned

Unity3D
OpenCV
Pix4DMapper
cvtColor

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