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Satellite imagery and Eye-movement analyses

These samples illustrate some of the information which can be collected using the Eye-Link eye-tracker

Scanning colored regions of satellite images
Videos of eye movement scans (avi format). The moving green dot shows movement of my gaze-path.
Click on images below to see enlargements & details of eye-movements
	Fixations Dark blue points (right) represent individual fixations;diameter of surrounding circle indicate relative frequency; #s indicate average fixation time in msec. Yellow outlines here show 'interest areas' (IA) which correspond (roughly) to colored regions in each map. I expected fixation frequency & duration to be greater for theIA colors being estimated, but instead I tended to maintain fixation in restricted regions of the display (often around the center). A simple glance seems to provide enough information to make these estimates.
	Saccades are shown as the straight yellow lines representing their ballistic paths. Arrows indicate their direction and #s indicate their order. Blue lines show actual samples of eye-movements recorded every msec.
Deliberate scanning of green region (above) & blue region (below)	*Interest areas & time series*		Estimating green region (above) & blue region (below)
	Scanning region: Green (forest) Blue (wetland) Yellow (ag) Red (urban)	The top of these images show fixations, saccades & IA's as described above. Bottom shows time series of (x & y dimensions of ) eye movements. In some of these time series, fixations are shown in bright blue rectangles, saccades are also represented as (vertical) yellow breaks. Velocity & acceleration are shown at at the top of the time series. Here is a sample from the 'scanning' trials which contains pronounced yellow ia's and illustrates many of the eye-movement parameters described above.