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Survey of Eye Tracking Techniques

Introduction. Acuity as a function of retinal location. Visual acuity drops off rapidly from the fovea to the visual periphery as shown in thisfigure. The best visual acuity is found in a parafoveal area of 1-4 degrees from the fovea. (adapted from Schmidt and Connolly, 1966). Photographic Simulation ofVariable Retinal Spatial Resolution.

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Survey of Eye Tracking Techniques

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    1. Survey of Eye Tracking Techniques

    2. Introduction

    4. Photographic Simulation of Variable Retinal Spatial Resolution

    5. To process visual detail we must move our eye balls so that we aim them in such a way that we get the greatest resolution which is in the fovea.

    7. Usually an eye fixation takes about 0.4 seconds (2.5 fixations/second) 60*2.5=150 eye fixations/minute 60*150=9000 eye fixations/hour 16*9000=144000 eye fixations/day 144000 is an average number of eye fixations per day or a number of visual details processed per day Usually the brain processes all visual information taken during a fixation and initiates the execution of the any action, if any execution is required. If too much information or uncertainty is present, then another fixation is necessary.

    8. Eye Tracking Techniques Electrooculography (EOG) Contact Lens Techniques a. Scleral coil b. Mirror reflector Limbus Tracker Video-based Pupil/Corneal Reflection Dual Purkinje Image Subjective Video Analysis

    9. Electrooculogram (EOG)

    10. Scleral Search Coil

    11. Scleral Mirror (Yarbus, 1967)

    12. Limbus Tracker

    13. Corneal Reflection Technique(s)

    14. ASL Model 501 (USD Vision Lab)

    15. Corneal Reflections/Calibration

    16. Measuring Driver Eye Movement Behavior

    17. USD Instrumented Research Vehicle

    18. ASL ETS-PC Driver Eye Tracking System

    19. Hidden Eye Tracker Optics

    20. Eye Tracker Operator (Rear Seat)

    21. Test Driver

    23. Corneal Reflections/Calibration

    24. Some Examples of Driver Eye Movement Records

    25. SD HWY 50 West

    26. Main Street - Vermillion

    27. Cherry Street Slow Moving Vehicle

    28. Saccade Detection Latency Comparison ASL 501 versus Limbus Tracker (Gaze Contingent Eye Tracking)

    29. Head-mounted Display (VR)

    30. Dual Purkinje Eye Tracker

    31. Subjective Localization of Gaze (Frame-by-frame Video Analysis)

    32. Older Driver Performance Metrics Internet-in-the-Car (Driver Distraction)

    33. Older Driver Performance Metrics Internet-in-the-Car (Driver Distraction)

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