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Eye Tracking Technologies: VDC-Whitepaper

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The Virtual Dimension Center (VDC) Fellbach has compiled the state of the art as well as the market situation and areas of application of the technology field "Eye Tracking" and put it together in a whitepaper.

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Eye Tracking Technologies: VDC-Whitepaper

  1. 1. © Competence Centre for Virtual Reality and Cooperative Engineering w. V. – Virtual Dimension Center (VDC) Prof. Dr.-Ing. Dipl.-Kfm. Christoph Runde, Franziska Jöckel Virtual Dimension Center (VDC) Fellbach Auberlenstr. 13 70736 Fellbach www.vdc-fellbach.de Whitepaper Eye Tracking
  2. 2. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 2 Structure 1. Introduction 2. Market analysis 3. Construction types 4. Measurement methods 5. Application fields 6. Summary
  3. 3. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 3 Structure 1. Introduction 2. Market analysis 3. Construction types 4. Measurement methods 5. Application fields 6. Summary Introduction
  4. 4. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 4  Eye tracking refers to the visual movements of a person, consisting mainly of fixations (points that are focused), saccades (fast eye movements) and regressions.  Eye tracking systems consist of (1) recording devices/ techniques (2) the algorithms for processing the raw measurement data and (3) the utilization in the form of representation methods of the processed information. Introduction to the field of technology Introduction
  5. 5. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 5  The purpose of eye tracking is usually to determine where a person is looking  In order to calculate the intersection of the human visual axis with relevant objects, the following three parameters must be recorded: o Viewing direction o Eye position in the spatial coordinate system o Coordinates of all relevant objects in the spatial coordinate system  Eye tracking technologies deal with capturing either the first or the first two types of information  If the viewing objects are on a screen, tracking systems also involve the third type of information; otherwise it requires a 3D space model Introduction to the field of technology Introduction
  6. 6. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 6 Anatomy of the human eye with several basic terms Introduction to the field of technology Anatomy of the human eye Image: anatomyclass01.us Introduction
  7. 7. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 7 Structure 1. Introduction 2. Market analysis 3. Construction types 4. Measurement methods 5. Application fields 6. Summary Market Analysis
  8. 8. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 8 Market figures, market development  Dynamically growing market  Market volume 2018: approximately $ 400 million  By 2023, the market volume will reach $ 1.43 billion  Assistive communication applications had the largest eye-tracking market share in 2016  North America as the largest regional market  External systems as the most important form of eye tracking systems Image: Eye Tracking Market, 2018 Global market development eye tracking 2016-2023 Market Analysis
  9. 9. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 9 Market participants  Among the most important eye tracking companies rank: o Tobii AB, o Eyetracking Inc., o Seeing machines Ltd., o Smarteye AB, o Sensomotoric Instruments (SMI) GmbH [now part of Apple],  Detailed overview of companies with assigned technologies and application markets on the next slide o LC Technologies Inc., o Eyetech Digital Systems Inc., o Ergoneers GmbH, o PRS IN VIVO, o SR Research Ltd. Market Analysis
  10. 10. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 10 Market participants Zu den wichtigsten Eye-Tracking Unternehmen zählen:  Tobii AB,  Eyetracking Inc.,  Seeing machines Ltd.,  Smarteye AB,  Sensomotoric Instruments (SMI) GmbH [nun Teil von Apple], Weitere:  Eye Sight  Sightcorp  Cogisen  Irisbond  Tobii Pro  Pupil labs  LC Technologies Inc.,  Eyetech Digital Systems Inc.,  Ergoneers GmbH,  PRS IN VIVO,  SR Research Ltd.  GazeHawk  Eyezag  Eyeware  Lumen research  Arrington research  Gazepoint Company Technologies Application markets Tobii AB External systems, Mobile eye tracking Gaming & Entertainment (VR), Medicine, Industry, Automotive, Assistive technology Smart Eye AB External systems Automotive, Medicine, Research consumer Sensomotoric Instruments External systems, Mobile eye tracking Research Eye Sight External systems Automotive, Smart Home, Consumer Sightcorp Software Smart Environments, Market research, Security, R&D Cogisen Software - Irisbond External systems, Software Assistive technology Tobii Pro External systems, Mobile eye tracking, SW Psychology, Neurosciences, (Market) research, Usability, Sport, Education Ergoneers Mobiles eye tracking, Software Transport, Market researcj, Usability, Biomechanics, Sport Pupil Labs Mobiles eye tracking, Software Research (vision) Gaze Hawk Software Usability Eyezag External systems Market research, Consumer research, Usability Seeing Machines External systems Automotive, Traffic Eyeware Software Research (academic, industrial), Consumer SR Research External systems, Mobile eye tracking Research (children, language, cognitive illness), Attention PRS IN VIVO Software, Service Market research, Purchasing behavior Eyetech External systems Assistive technology, Automotive, Entertainment, Medicine, Research, Security Lumen Research External systems, Mobile eye tracking Attention Arrington Research External systems, Mobile eye tracking - Gazepoint External systems Market/ consumer research, Development (Human Computer Interaction) Tabelle:Neumann,V.,2018 Market Analysis
  11. 11. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 11 Structure 1. Introduction 2. Market analysis 3. Construction types 3.1 Tower-Mounted Eye Tracking 3.2 Remote Eye Tracking 3.3 Mobile systems 4. Measurement methods 5. Application fields 6. Summary Construction Types
  12. 12. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 12 Tower-Mounted Eye Tracking  Head of the test person is fixed in the device  Three techniques ca be distinguished: o Pan tilt systems: mechanically movable components enable the camera (optics) to track the test person´s head movements o Tilting mirror systems: camera and optics remain fixed in space, servo-driven mirrors allow tracking of the eye during head movements o Fixed camera systems: these systems do without any mechanically moving components and achieve freedom of movement by means of image processing methods  Advantage: Delivers more accurate results in higher image frequency, disadvantage: intrusive, immobile Image: Fa. SR Research EyeLink 1000 tower mounted eye tracker Construction Types
  13. 13. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 13 Remote Eye Tracking  Enables non-contact measurements, eliminating the need for mechanical components such as transmission cables or chin restraints  The test person can move freely within a certain range of motion after successful calibration  Compensation of head movements: a person can fix a place and perform head movements without losing the fixation location  To register eye movements on a computer screen, the components of the device can either be installed directly in a screen or mounted below or next to it  Advantage: not intrusive, disadvantage: immobile Remote Eyetracker (integrated in screen) TobiiImage: Tobii Construction Types
  14. 14. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 14 Mobile systems  Eye tracking solutions are installed in glasses frames or similar and are connected to a portable computer  One camera system is pointed on the environment (world cam), one on the pupil (eye cam)  An algorithm projects one into the other  These systems make it possible to largely observe people in natural interaction with products and media  Possible applications outside the laboratory  Advantage: mobile, disadvantage: intrusive Mobile eye tracker Eye squere Image: eve spare Construction Types
  15. 15. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 15 Structure 1. Introduction 2. Market analysis 3. Construction types 4. Measurement methods 4.1 Eye attached tracking 4.2 Electric potential measurement 4.3 Optical methods  Oculography  Infrared or LASER reflections  3D Tracking 5. Application fields 6. Summary Measurement Methods
  16. 16. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 16 Eye attached tracking The position and orientation of an object connected with the eye (e.g. a specific contact lens) can be measured:  Reflection of mirrored contact lenses is recorded by a camera  Electromagnetic tracking by means of a search coil: contact lenses provided with coils are exposed to a magnetic field  eye movement can be calculated from induced tension  Photoelectric tracking: photoelectric sensors conduct electricity as a function of the incident light and thus of the eye movement  Video-based tracking of artificial markers (black dots on the sclera) Mirror reflection systems Search Coil Photo- electric limbus tracker Image: Holqvist, K; Andersson 2017 Image: Duchowski, A. T., 2017 Image: Gilroy, H., 2018 Measurement Methods
  17. 17. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 17 Electric potential measurement  Measuring the electrical potential by positioning electrodes around the eye  Electrooculograms (electro-oculography - EOG) measure the electrical voltage between the retina (negative pole) and the cornea (positive pole)  Imec, a research center for nanoelectronics and digital technologies, has introduced a fast, wireless eye tracking system (ITF Belgium 2018) based on EOG o Five dry contact electrodes on glasses o Ergonomic design of everyday glasses o Sampling rates of 256 per second Example of an EOG system Image: imec Fast, wireless eye tracking ergonomically designed Image: Duchowski, A. T., 2017 Measurement Methods
  18. 18. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 18 Optical detection - Oculography 1. Oculography  Optical detection of eye properties during rotation and translation  Measurands of oculography o Pupil shape o Eyelid angle and cornea curvature o Position of the limbus o Retina o Position face and eyes  Two fundamentally different methods can be distinguished regarding the evaluation of these measured values: o Regression analysis (appearance-based approach) o Parametric-geometric fitting Retina characteristics around the visual nerve Example pupil forms Example of a bright pupil Image: Duchowski, A. T., 2017 Image: N.N., 2018 Image: Duchowski, A. T., 2017 Measurement Methods
  19. 19. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 Optical detection - Oculography  Regression analysis (appearance-based approach): The captured 2D image is compared to and merged with previously acquired images that have already been logically assigned to a meaning  Parametric geometric fitting – today used for eyes and face o Eyes: geometric image recognition, in which image features are mathematically detected  fitting of a known geometric primitive o Face: Face-model-based approach determines facial features from the 2D image Camera images of eyes for evaluation The feature-based evaluation„Iris- Fitting“ Optical determination of facial characteristics from a 2D image 19 Image: Eyeware Image: Eyeware Image: tobii Measurement Methods
  20. 20. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 20 Optical detection - Oculography Advantages of oculography: + Mostly non-intrusive procedure (exception: retina tracking) + Falling prices of digital camera systems + Retina tracking is very accurate Disadvantages of oculography: - Retina tracking is intrusive - Regression analysis, parametric-geometric fitting and face-model-based approach are less accurate/ reliable - Dependency on lighting conditions - If only one camera is used, 3D spatial information is missing; oculography is unable to determine the focal point - Stereoscopic camera systems limit the working space Measurement Methods
  21. 21. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 21 Optical detection – Infrared or LASER reflection 2. Infrared or LASER (light amplification by stimulated emission of radiation) reflection  For the absolute direction of view, several eye features must be measured, so that the head movement can be distinguished from the eye rotation  Measuring principles of infrared or LASER reflection o Pupil center-cornea-reflection (PCCR): measurement of corneal reflection (also called Purkinje reflections/ image) relative to the pupil center o Dual Purkinje Imaging (DPI) eye trackers: also measure the fourth Purkinje image  differentiate between translational and rotational eye movement; DPI-Eye trackers are very precise, but the viewer's head has to be fixed o The regression analysis or the parametric-geometric fitting can be used to determine the pupil center The four Purkinje- reflections The user of this DPI eye tracker fixes her head by biting in a fixed dental imprint Image: Duchowski, A. T., 2017 Image: Duchowski, A. T., 2017 Measurement Methods
  22. 22. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 22 Optical detection – Infrared or LASER reflection Advantages of infrared/ LASER reflection: + PCCR systems are not intrusive (exception: mobile PCCR glasses) + If multiple cameras are used, the estimation of the head position in absolute 3D space is also possible + If (non-visible) infrared light is used, the entire setup is more independent of the given lighting situation Disadvantages of infrared/ LASER reflection: - DPI systems are intrusive - Natural sunlight interferes with the use of outdoor PCCR and DPI trackers - Limited range (about 1m) - If several cameras are used to generate 3D information, the working space is additionally reduced Measurement Methods
  23. 23. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 23 Optical recording – 3D Tracking 3. 3D Tracking Measurement of the absolute head position in 3D space  Predominant technological approaches when using separate tracking systems: o Inertial measuring systems: determine position and angle changes by integrating the acquired accelerations. The incorporation of additional sensors (for example magnetic field sensors) gives the designation nine-degree of inertial measuring system (9DOF-IMU). 9DOF IMUs are cost effective, enable fast measurements, but do not handle absolute tracking. o Optical tracking: Infrared cameras detect active (IR LEDs) or passive (IR reflectors) IR light spots arranged in a specific spatial structure. The computer can calculate the position and orientation of the observed object from the pattern of the IR light spots, which is detected by at least two cameras. Shutter glasses (Volfoni ) which enables stereoscopic vision, combined with an eye tracker system of SMI and an external optical tracking system of A.R.T. Head Mounted Display (HMD) "Vive" with assigned tracking cameras (black cubes) and input devices/ controller Image: HTC Image: itersnews, 2018 Measurement Methods
  24. 24. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 24 Optical recording – 3D Tracking  Using 3D depth cameras o Camera systems that - unlike normal analog or digital cameras that display grayscale or color values of objects - allow the representation of distances of an entire scene. o 3D camera and outside-in-tracking: regarding the outside-in-tracking, the tracker (here: the 3D camera) is located in the reference, i.e. in the fixed spatial environment, and "looks" at the moving, tracked object (such as a flystick or the user's head) Microsoft Kinect system with explanation of the integrated sensors Image: Microsoft Measurement Methods
  25. 25. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 25 Optical recording – 3D Tracking Measurement of head geometry 3D cameras can generate a 3D image of their environment. Eyeware uses this approach to create a user-specific 3D model of the head. Thereby the precise head geometry is known. Measurement of the position of the eyes Using a laser, an eye tracker scans circularly over the iris, which reproduces the torsion rotation of the iris by comparing the striation on successive recordings. These trackers can thus determine the 3D position of the eye in the head coordinate system. Commercial tracking systems currently do not use this technology. Eyeware 3D head modelImage: Eyeware Measurement Methods
  26. 26. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 26 Optical recording – 3D Tracking Advantages of 3D Tracking + Separate tracking systems can achieve long ranges (10-20m) and, when connected in parallel, a large working space (e.g. 10m x 50m) + 3D cameras are inexpensive + 3D cameras are not intrusive + 3D cameras provide 3D head position and orientation information + 3D cameras can create a 3D image of the head  more precise localization of the eyes Disadvantages of 3D Tracking  The LASER detection according to Irie is intrusive and costly  Separate tracking systems are usually costly. 9DOF IMUs are inexpensive, but can not be used as a stand-alone system, as they do not allow absolute tracking.  Separate tracking systems are almost always intrusive. Markerless motion capturing tracks primarily the trunk, arms, hands, legs and feet. The accuracy of the detection of the head would be insufficient to derive a viewing direction. . Measurement Methods
  27. 27. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 27 Structure 1. Introduction 2. Market analysis 3. Construction types 4. Measurement methods 5. Application fields  Usability  Market research  Film  Psychology  Ergonomics 6. Summary Application Fields  Medicine  Educational sciences  Security  Virtual Reality
  28. 28. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 28 Usability  Used by User Experience (UX) and Human-Computer Interaction (HCI) researchers  Exploring usability in human-computer interactions  Explaining human behavior based on objective data  Use in the field of software ergonomics: usability tests analyze the perception of test persons during the execution of tasks with software or on a website  Use in the ergonomic, UX and HCI-compliant design of all machine operations (e.g. kiosk systems) and cockpit systems of any vehicle (e.g. cars) Examination of the usability of a railway station displayImage: Kuerzel, E., 2018 Application Fields
  29. 29. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 29 Market research  A method to objectively measure the attention of consumers and their spontaneous reaction to advertising messages  effective design of communication  Research aspects include the design of sales packaging, retail stores, point-of-sale promotions, websites, newspapers and magazines and product design Market research with eye tracking: supermarket testImage: Kuerzel, E., 2018 Application Fields
  30. 30. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 30 Film  Motion control of the extremities (also gestures) of virtual avatars in animated films by actors using Motion Capturing  The technique is also used for capturing facial expressions  Meanwhile, the capturing repertoire includes eye tracking Pascal Langdale as Caleb Smith in Faster than Night photo by Vanessa Shaver, 3D model by Dionisios Mousses/SIRT Centre Image: Gilroy, H., 2018 Application Fields
  31. 31. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 31 Psychology  Applications in psychology and neuroscience to understand how and why eye movements arise and how we visually capture information  Examination aspects are image and movement perception Eye tracking/ cognitive neuroscienceImage: Crane, H.D., 1978 Application Fields
  32. 32. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 32 Ergonomics  Eye tracking is used in ergonomics in order to evaluate performance, compare novices with experts, develop effective training protocols and cognitive strategies  The same applies to the ergonomic, intuitive and efficient design of work systems in terms of usability Image: Usability.gov Image: TU Chemnitz Image: TU Chemnitz Eye tracking examinations in a usability lab Heat Maps represent where and how long the attention is directed Image: Usability.gov Application Fields
  33. 33. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 33 Medicine  Eye lasers: eye tracking measures the movements of the eye and adjusts the laser. Possibly the laser will be switched off until the eye has regained the desired position.  Increasing importance in psychiatry (more reliable and earlier diagnoses, such as autism, ADHD)  In competitive sports, there is great interest in finding out how to train sport-specific eye movement strategies  Optimization/ support of the work of a doctor: checking the concentration (on the right place), control of functions with the eyes High speed trackingImage: Irie, K., 2002 Application Fields
  34. 34. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 34 Educational sciences  Eye tracking is used in educational science to study learning processes  In addition, classrooms and laboratories are equipped with this technology in order to educate the next generation in the use of eye tracking in a wide variety of areas Tobii Pro eye tracking reveals student attention in classroomImage: tobiipro.com Application Fields
  35. 35. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 35 Security  Driving assistance systems o By using eye tracking technologies, the driver's condition can be monitored and supported based on the opening degree of the eye, the head posture, including movements, and the rate of blinks o Thereby microsleep, inattention and loss of control can be prevented  Smart home, device and data security, public events  capturing persons, behavioral patterns Application Fields
  36. 36. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 36 Virtual Reality  HMD integrated eye tracking was immediately an issue with the advent of low-cost HMDs  Autostereoscopic display systems based on parallax barrier technology are aligned with the viewer's position relative to the display. Therefore the position of the viewer´s eyes must be known.  Development of the technology "Foveated Rendering": The main burden of the GPU is to be concentrated on the areas of a 3D scene that the user focuses on; whereas marginal areas should be allocated less GPU capacity  prerequisite: eye tracking  Main areas of application: usability, design studies, market research SMI for Oculus Rift at Carrefour Arrington Research Eyeframe FOVE: HMD with integrated eye trackingImage: FOVE Image: FH Kufstein Image: mellottsvrpage.com Application Fields
  37. 37. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 37 Structure 1. Introduction 2. Market analysis 3. Construction types 4. Measurement methods 5. Application fields 6. Summary Summary
  38. 38. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 38 Summary Application fields • Usability • Market research • Film • Psychology • Ergonomics • Medicine • Educational sciences • Security • Virtual Reality Eye tracking- Measurement methods • Eye attached tracking • Electric potential measurement • Optical methods • Oculography • Infrared or LASER reflection • 3D tracking Eye tracking- Construction types • Tower-Mounted Eye Tracking • Remote Eye Tracking • Mobile systems Summary
  39. 39. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 39 Summary  There is a variety of different types and methods of eye trackers today. These are very different in terms of usage context, measurement, precision and price.  The contact lens method and the electrical potential measurement no longer have any practical significance on the market today. DPI trackers are of very close medical importance.  Today, eye tracking is done using optical techniques: oculography and pupil center-cornea-reflection (PCCR) are the dominating procedures. The use of 3D cameras is not yet a product on the market.  For HCI examinations, external systems are often used because they are not intrusive and the workspace with the interaction space in front of the machine interface is restricted anyway.  High-precision, space-stable installation systems, such as for retina detection, are used primarily in medical applications.  There is not the "best" eye tracking system (dependency on the application). Summary
  40. 40. Market Analysis Mission Measurement Methods Application FieldsConstruction Types SummaryIntroduction 24.09.2018 40 Sources  Bergstrom, Jennifer Romano; Schal, Andrew: Eye Tracking in User Experience Design. Morgan Kaufmann, 2014, ISBN 978-0-12- 416709-4.  Crane, H.D.; Stelle, C.M.: Generation-V dual- Purkinje-image eyetracker. Applied Optics, 17(5), 1978, S. 527-537  Duchowski, Andrew T.: Eye Tracking Methodology. Theory and Practice. Third Edition. Spring-er-Verlag, London, 2017  Eye Tracking Market 2018 Leading Growth Drivers, Emerging Audience, Segments, Sales, Prof-its & Analysis [aus: http://www.crossroadstoday.com/story/37763 460/eye-tracking-market-2018-leading- growth-drivers-emerging-audience-segments- sales-profits-analysis]  Gilroy, H.: Facial Capture. Online unter: https://praxistheatre.com/author/fasterthannig ht/ page/2/; abgerufen am 31.3.2018  Holmqvist, K.; Andersson, R.: Eye Tracking. A comprehensive guide to methods, paradigms, and measures. Second edition. Lund Eye Tracking Research Institute AB, Lund, 2017  itersnews: Displays. 3D eye tracking smart glass gives immersive 3D gaming experience. Online unter: http://itersnews.com/?p=24045; abgerufen am 31.3.2018  Kuerzel, Eric: How Eye Tracking is Driving the Next Generation of AR and VR; online unter: https://vrscout.com/news/eye-tracking-driving- next-generation-ar-vr/; abgerufen am 31.3.2018  Lobe, Adrian: Schau mir in die Augen, Kunde. In: TagesWoche am 31.01.2015; online unter https://tageswoche.ch/allgemein/schau-mir-in- die-augen-kunde/; abgerufen am 31.3.2018  abgerufen am 31.3.2018  tobii: Was ist Ihr Anwendungsfeld?; online unter: https://www.tobiipro.com/de/anwendungsfeld er/ ; abgerufen am 31.3.2018  tobii: Year-End Report January – December 2017; online unter: https://www.tobii.com/group/ investors/calendar/year-end-report-q4-2017/; abgerufen am 31.3.2018  Nielsen, Jakob; Pernice, Kara: Eyetracking Web Usability. New Riders Publishing, Thousand Oaks, CA, USA 2009, ISBN 978-0- 321-49836-6.  Irie, K.; et al.: LASER-based eye-tracking system. Behavior Research Methods, 34(4), 2002, S. 561-572
  41. 41. VDC and Visual Sweden members regarding this topic 24.09.2018 41
  42. 42. © Competence Centre for Virtual Reality and Cooperative Engineering w. V. – Virtual Dimension Center (VDC) Thank you very much for your interest! You are interested in this topic and you are looking for contact persons/ implementation partners? Please contact us. Virtual Dimension Center (VDC) Fellbach Auberlenstraße 13 70736 Fellbach www.vdc-fellbach.de

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