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Fig. 1. Experimental apparatus for recording antennal movements. An animal was
tethered on a free-moving Styrofoam ball to allow its unrestrained locomotion
(Okada and Toh, 2000). Three
video cameras were set just in front (1), top (2) and side (3) of the animal.
Video images were processed by a 4-split multi-viewer, videotaped, and
analyzed using a PC. Photograph on the right is an example of synthesized
video frame after the processing, showing frontal (1), top (2) and side (3)
views.