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User-Centered Computer Vision Systems

IntelliGaze IG-30 Gaze-Interaction System Quickstart Guide Ver 1.5

Quickstart Guide

2 Pages

Quickstart Guide IntelliGaze IG-30 Gaze-Interaction System 1  Introduction  The alea technologies team thanks you for your decision to use the IG-30 system and wishes you a successful gaze interaction experience. The system will allow the user to control specialized, e.g. AAC applications as well as many standard Windows applications through eye-movements. This Quickstart-Guide will guide you through the first steps and list configuration option, where appropriate. 1.1 IntelliGaze [IG] v.1.2 IntelliGaze can be seen as a mouse replacement software application. It uses a camera system to acquire images of the user and calculates the actual gaze from the eye images. The gaze location is then flexibly mapped into a cursor position and configurable mouse control. A new user needs to be calibrated to the system, before the gaze control can be used. The gaze tracking and 'click' control can be adopted to the user requirements and the target application. 1.2 Application Center [AC] The Application Center acts as a configurable Home-Page to the gaze controlled PC. It provides one-look start-up of applications and Windows desktop access. The AC also provides off-screen accessible areas, which control the mouse behavior and allow the run-time adjustment of several system parameters.  2.2 Monitor Calibration These measurements only have to be performed, if the camera mounting geometry has been changed. A failure can in particular cause inaccuracies under head-movements. 1. Open the external program: All Programsalea technologiesIntelliGazeMonitor Calibration  2. Enter the values for the monitor resolution. 3. Use a metric ruler to measure the physical monitor size and the camera-monitor distances. 4. Close the program and restart IntelliGaze. 2.3 Software The IntelliGaze background operation should be started with your login if the entry has been put into the 'Autostart' list correctly, and show up in the system-tray, where a right-click on the icon shows the options. If a manual start is desired, double click on the IntelliGaze icon on the desktop.  3  First Start  The following paragraphs will provide a step-by-step guide through a successful operation of the system  It is highly recommended to limit the complexity of the 1 st gaze controlled application, and test the setup with an experienced user like the operator himself, in advance.  As simplification the first steps are assumed to carried out with a Dwell click. Alternatives are Blinks or Switches (see 4.2)  2  System Setup  2.1 Hardware The system should have been pre-configured by your supplier. The camera mounting has been matched with the monitor type and size and has been pre-adjusted properly. 1. Attach the monitor to the desktop stand or monitor arm provided.  Please pay attention to the mechanical robustness so that the setup can not tip over or harm the user.  2.  Attach the camera unit to the special adapter provided with your system.  The camera lens has been calibrated and locked during production. Do not try and change the lens settings at any time.  3. 4.  Connect the camera cable to a USB2 port on the computer, attach the power-supply and connect it to the net. Turn on the computer.   The LED on the back-side of the camera unit indicates proper power-supply of the illumination (green). In case of problems, the LED will change to orange, in which case you should turn the device off and contact service.  If the camera has been connected to a different USB2 port than before, the driver installation dialog might pop up, but should simply be accepted.  If the physical camera-monitor configuration has been changed, the settings in the Monitor Calibration have to be adapted accordingly!  3.1 Subject Orientation The monitor should be aligned with the subjects head, in about 60cm distance. The top of the monitor should be only slightly below the top of the subjects head. If the subject's head is rotate, i.e. lying on the side, the monitor should be rotated as well.  Once a correct position is achieved, the tracking will start fully automatically. The Tracking Status Monitor will help, adjusting the subject or monitor. As a result, the head position should be indicated as good (green) and both eye icons should be present while looking at the corners of the screen. If a subject wearing glasses turns out to be problematic to track stably, changing the head angle or tilting the glasses slightly will improve results in most cases. Halogen spot lights or direct sunlight can cause problems as well and are to be avoided. 3.2 Calibration Start the calibration by either looking into the camera or pressing Ctrl-F5. Follow the calibration target on the screen. After the sequence finishes, the calibration result will be displayed. The colored dot's size will represent the selected target accuracy for the calibration and the color, as well as the text label, will indicated the achieved result. The calibration can be accepted by looking (pressing) at the accept button. If problematic data has been collected for some points, these will be labeled and the option 'Improve' will be displayed. Depending on the desired accuracy and the subjects capabilities the
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