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Video Pupillary Tracking Systems as a Method for Interfacing

Video Pupillary Tracking Systems as a Method for Interfacing. Jesse McVaney BME 281 – Oct 23,2012. History. 1879: Louis Emile Javal – observes eye movement during reading. - Edmund Huey creates early eye tracker 1970: Hunziker creates video/glass technique to track eye movement.

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Video Pupillary Tracking Systems as a Method for Interfacing

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  1. Video Pupillary Tracking Systemsas a Method for Interfacing Jesse McVaney BME 281 – Oct 23,2012

  2. History • 1879: Louis Emile Javal – observes eye movement during reading. - Edmund Huey creates early eye tracker • 1970: Hunziker creates video/glass technique to track eye movement. • 2000’s: Open Source software and inexpensive parts allow for inexpensive video trackers

  3. Fig.1: Reading gaze (public domain) Fig. 2: Hunziker’s 8mm film through Glass technique

  4. Video Pupillary Technique Output Signal Software Micro controller/ Micro processor Infrared light Collector Diode & Camera Emitter Diode

  5. The output signal form the software is interpreted as a coordinate system. • The camera must be calibrated using a dot array on a computer screen (Abbott & Faisal) • This method allows for eye tracking to interface with computer equipment.

  6. Tobii X60 Eyetracker GT3D Tracker

  7. Advantages • Non- Invasive • Little to no training • Small and portable • Fast information rate • Parts are relatively inexpensive.

  8. EEG Brain interface : 1.63 bits/sec • Cortical invasive interface : 3.3 bits/sec • EMG/speech recognition : 6.13 bits/sec • Video Eye Tracking: 1100 bits/sec

  9. Uses • Due to its high sample rate, eye tracking could be used to more easily control prosthetics. • Control Equipment such as machinery/ wheel chairs • Interface with computers for web browsing/ word/image processing, etc. • Research and Marketing

  10. Future • Cost reduced • Computer interfacing not just for disabled • Smaller, more portable units • Better controls for non 2D interfacing

  11. Sources Cited • Wikipedia: Eye Tracking http://en.wikipedia.org/wiki/Eye_tracking, 2012 • Hans-Werner Hunziker: Visuelle Informationsaufnahme und Intelligenz: Eine Untersuchung über die Augenfixationen beim Problemlösen. Schweizerische Zeitschrift für Psychologie und ihre Anwendungen, 1970, 29, Nr ½ http://en.wikipedia.org/wiki/File:Eye_tracking_thru_glass.JPG 2012 • Abbott W, Faisal A. BMC Neuroscience. Ultra Low Cost eyetracking as an high information throughput alternative to BMIs 112 (1): 103,2011 • Tobii X60 http://www.tobii.com/en/eye-tracking-research/global/products/hardware/tobii-x60x120-eye-tracker/ • Abbott W, Faisal A. GT3D Tracker.CNN:$30 gadget lets you control computer with your eyes. < http://www.cnn.com/2012/09/24/tech/mci-eye-tracking-gadget/index.html> 2012 • Tobii Glasses < http://www.tobii.com/eye-tracking-research/global/products/hardware/tobii-glasses-eye-tracker/ >

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