This early video as made for fun in 1996. It documents me having various conversations with people and generally looking around. The main points of interest are first the fact that faces seem to be located effortlessly (one saccade) from considerable angular distances, and second the way that they are viewed. Gaze concentrates on the triangle of the eyes and mouth, very much as in Alfred Yarbus’ records of stationary face viewing.
Eye movement recordings were made with a head-mounted camera that produced a split image in which the top two-thirds showed the scene ahead and the lower third the eye in its socket, imaged via a concave mirror. The location and ellipticity of the iris were used to obtain the coordinates of eye direction, by matching the iris outline to a computer- generated eye model. This was done by hand, frame-by-frame, at 50 f.p.s. The coordinates were used to position a 1º dot on the upper scene view, and each frame re-recorded. Head movements could also be obtained by tracking distant background objects in the scene view. The resulting video contains numerical values (in degrees) of the direction of view of the fovea, a frame counter, and a clock. The videos are reversed left to right as a result of the mirror optical system.
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