The Toolbox
The Video Eyetracker Toolbox is implemented as an OLE Automation Object,
built upon Microsoft's
COM technology. This results in an extremely simple Application Programming
Interface (API), which is supported by almost all modern Windows programming
systems; for example: Delphi, C++, MATLAB, Visual
Basic, even Visual
Basic for Applications (imagine your eye tracker controlled from
a Word macro!).
The Toolbox includes all the functions needed to incorporate eye tracking
into experimental software. For example, calibration is performed by
one simple call. Here is the complete Delphi source
code, written in just seven lines, to implement a video eye tracker application
which calibrates the eye tracking engine, tracks eye position, and displays
fixation on a mimic of the subject's display. The COM object is highly
optimised for performance and is fully threaded; this means that on a
modern PC most of the computer's CPU time is available to service your
application.
Code
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Comment
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MyEyeTracker := CoVideoEyetracker.Create;
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Initialise and create an instance of the Toolbox OLE Automation
Object
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MyEyeTracker.SetCameraScreenDimensions(8, 36, 200, 150);
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Position and display the eye image window
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MyEyeTracker.CreateCameraScreen(Self.Handle);
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MyEyeTracker.SetMimicScreenDimensions(216, 36, 200, 150);
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Position and display the mimic window
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MyEyeTracker.CreateMimicScreen(Self.Handle);
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MyEyeTracker.Calibrate(params);
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Initialise the calibration procedure
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MyEyeTracker.StartTracking;
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Begin eyetracking and display eye position in the mimic
window
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videoEyetrace
 Also
included with the ToolBox is videoEyetrace, a complete eye tracking environment,
with mimic display and scrolling eye position graph. Includes visual
stimuli for saccade and smooth pursuit experiments, plus bitmap images
for reading and visual scanning experiments.
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High
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Eyetracker Toolbox
Eyetracker
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