Visual Field Reconstruction (VIDEO)
Caption
Researchers used a visual field reconstruction method to analyze videos of fish responding to the 'looming stimulus.' Each sequence in the video shows an individual loom experiment (hundreds were performed for the study). To make these sequences, researchers chose a focal fish (the fish with the rays emanating from its head), then cast virtual light rays from that fish's head to the other fish in the area (white rays) and to the expanding image being played on the tablet screen (red rays). By counting up the number of rays that hit each object, they could calculate what the fish would have seen at each moment in time. By doing this for all fish in all experiments, they could estimate the visual sensory input that drives the behavior of these fish.
Credit
Hein et al, PNAS, 2018
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For use only with news coverage of this research.
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