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公开(公告)号：US10212343B2
公开(公告)日：2019-02-19
申请号：US15202915
申请日：2016-07-06
Applicant: Tobii AB
Inventor： Henrik Eskilsson , Mårten Skogö , John Elvesjö , Peter Blixt
Abstract: An imaging device adapted to provide eye-tracking data by imaging at least one eye of a viewer, wherein: the imaging device is switchable between at least an active mode and a ready mode; the imaging device is configured to use active eye illumination in the active mode, which enables tracking of a corneal reflection; and the imaging device is configured, in the ready mode, to reduce an illumination intensity from a value the illumination intensity has in the active mode, and to provide eye-tracking data which include eye position but not eye orientation.
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公开(公告)号：US20180206771A1
公开(公告)日：2018-07-26
申请号：US15927830
申请日：2018-03-21
Applicant: Tobii AB
Inventor： Miroslav Kobetski , Johnny Holmberg , Peter Blixt , John Mikael Elvesjö
CPC classification number: A61B5/18 , B60K28/066 , G06K9/00597 , G06K9/00604 , G06K9/2018 , G08B21/06 , H04N7/18 , Y02T10/84
Abstract: A monitoring system and method for monitoring and/or predicting drowsiness of a driver of a vehicle or a machinery operator are provided. A set of infrared, IR, or near infrared, NIR, light sources, is arranged such that an amount of the light emitted from the light source incidents on an eye of the driver or operator. The light that impinges on the eye of the driver or operator forms a virtual image of the signal sources on the eye including the sclera and/or cornea. An image sensor obtains consecutive images capturing the reflected light, wherein each image will contain glints from at least a subset or all of the light sources. A drowsiness index can be determined based on the extracted information of the glints of the sequence of images, wherein the drowsiness index indicates a degree of drowsiness of the driver or operator.
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公开(公告)号：US20180103202A1
公开(公告)日：2018-04-12
申请号：US15831511
申请日：2017-12-05
Applicant: Tobii AB
Inventor： Henrik Eskilsson , Mårten Skogö , John Elvesjö , Peter Blixt
CPC classification number: H04N5/23241 , G02B27/0172 , G02B2027/0138 , G06F3/013 , G06K9/00597 , G09G2330/021 , G09G2354/00 , H04N5/23245
Abstract: An imaging device adapted to provide eye-tracking data by imaging at least one eye of a viewer, wherein: the imaging device is switchable between at least an active mode and a ready mode; the imaging device is configured, in the active mode, to use active eye illumination, which enables tracking of a corneal reflection, and to provide eye tracking data which include eye position and eye orientation; and the imaging device is configured, in the ready mode, to reduce an illumination intensity from a value the illumination intensity has in the active mode.
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公开(公告)号：US20160353025A1
公开(公告)日：2016-12-01
申请号：US15233761
申请日：2016-08-10
Applicant: TOBII AB
Inventor： Henrik Eskilsson , Mårten Skogö , John Elvesjö , Peter Blixt
CPC classification number: H04N5/23241 , G02B27/0172 , G02B2027/0138 , G06F3/013 , G06K9/00597 , G09G2330/021 , G09G2354/00 , H04N5/23245
Abstract: An imaging device adapted to provide eye-tracking data by imaging at least one eye of a viewer, wherein: the imaging device is switchable between at least an active mode and a ready mode; the imaging device is configured, in the active mode, to use active eye illumination, which enables tracking of a corneal reflection, and to provide eye tracking data which include eye position and eye orientation; and the imaging device is configured, in the ready mode, to reduce an illumination intensity from a value the illumination intensity has in the active mode.
Abstract translation: 一种成像装置，适于通过对观看者的至少一只眼睛进行成像来提供眼睛跟踪数据，其中：所述成像装置可在至少活动模式和就绪模式之间切换; 在活动模式下，成像装置被配置为使用主动眼睛照明，其使得能够跟踪角膜反射，并且提供包括眼睛位置和眼睛取向的眼睛跟踪数据; 并且成像装置在准备模式下被配置为从照明强度在活动模式中具有的值减小照明强度。
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公开(公告)号：US20210014442A1
公开(公告)日：2021-01-14
申请号：US16796501
申请日：2020-02-20
Applicant: Tobii AB
Inventor： Magnus Ivarsson , Per-Edvin Stoltz , David Masko , Niklas Ollesson , Mårten Skogö , Peter Blixt , Henrik Jönsson
IPC: H04N5/378 , G06K9/00 , G06T7/70 , G06K9/32 , H04N5/225 , G06F3/01 , H04N5/345 , H04N5/33 , H04N9/04
Abstract: Techniques for reducing a read out time and power consumption of an image sensor used for eye tracking are described. In an example, a position of an eye element in an active area of a sensor is determined. The eye element can be any of an eye, a pupil of the eye, an iris of the eye, or a glint at the eye. A region of interest (ROI) around the position of the eye is defined. The image sensor reads out pixels confined to the ROI, thereby generating an ROI image that shows the eye element.
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Patent Agency Ranking
公开(公告)号：US20200154996A1
公开(公告)日：2020-05-21
申请号：US16436003
申请日：2019-06-10
Applicant: Tobii AB
Inventor： Peter Blixt , Gunnar Troili , Anders Kingbäck , John Mikael Elvesjö , Mårten Skogö
Abstract: A method includes obtaining an image of an eye in a bright-pupil imaging mode in which a retinal retro-reflection complements the image of the eye in the bright-pupil mode, and obtaining an image of the eye in a dark-pupil imaging mode in which a corneo-scleral retro-reflection complements the image of the eye in the dark-pupil mode. One of the bright-pupil imaging mode and the dark-pupil imaging mode is selected based on quality of obtained images.
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公开(公告)号：US10467470B2
公开(公告)日：2019-11-05
申请号：US15276618
申请日：2016-09-26
Applicant: Tobii AB
Inventor： Simon Gustafsson , Anders Kingbäck , Peter Blixt , Richard Hainzl
IPC: G06K9/00 , G02B27/00 , G02B27/01 , G06F3/01 , G06F3/0481 , G06F3/0484 , G06F3/03 , G06F3/0485 , G09G5/34 , A61B3/113
Abstract: A system for determining a gaze direction of a user in a wearable device is disclosed. The system may include a display device, a primary lens, an illuminator, and a plurality of imaging device. The primary lens may be disposed in front of the display device. The illuminator may be configured to illuminate an eye of a user. The plurality of imaging devices may be disposed on or in the primary lens to detect light reflected by the eye of the user.
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公开(公告)号：US20190302882A1
公开(公告)日：2019-10-03
申请号：US16229165
申请日：2018-12-21
Applicant: Tobii AB
Inventor： Peter Blixt , Anders Kingback , Bengt Rehnstrom , John Elvesjö , Mattias Kuldkepp
Abstract: A visual display includes hidden reference illuminators adapted to emit invisible light for generating corneo-scleral reflections on an eye watching a screen surface of the display. The tracking of such reflections and the pupil center provides input to gaze tracking. A method for equipping and an LCD with a reference illuminator are also provided. Also provides are a system and method for determining a gaze point of an eye watching a visual display that includes reference illuminators. The determination of the gaze point may be based on an ellipsoidal cornea model.
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公开(公告)号：US20180270436A1
公开(公告)日：2018-09-20
申请号：US15976640
申请日：2018-05-10
Applicant: Tobii AB
Inventor： Magnus Ivarsson , Per-Edvin Stoltz , David Masko , Niklas Ollesson , Mårten Skogö , Peter Blixt , Henrik Jönsson
CPC classification number: H04N5/378 , G06F3/012 , G06F3/013 , G06K9/00604 , G06K9/3208 , G06K9/3233 , G06T7/70 , G06T2207/10152 , H04N5/2256 , H04N5/332 , H04N5/345 , H04N9/04553
Abstract: Techniques for reducing a read out time and power consumption of an image sensor used for eye tracking are described. In an example, a position of an eye element in an active area of a sensor is determined. The eye element can be any of an eye, a pupil of the eye, an iris of the eye, or a glint at the eye. A region of interest (ROI) around the position of the eye is defined. The image sensor reads out pixels confined to the ROI, thereby generating an ROI image that shows the eye element.
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公开(公告)号：US20180242841A1
公开(公告)日：2018-08-30
申请号：US15867312
申请日：2018-01-10
Applicant: Tobii AB
Inventor： Richard Hainzl , Mattias Kuldkepp , Peter Blixt , Mårten Skogö
CPC classification number: A61B3/113 , G02B5/18 , G02B27/0093 , G06F3/013 , G06K9/00604
Abstract: A subject is illuminated whose movements of at least one eye are to be registered by an eye-tracker for producing resulting data. To this aim, a coherent light source in light producing means produces at least one well-defined light beam. A diffractive optical element is arranged between the coherent light source and an output from the light producing means. The diffractive optical element is configured to direct a light beam towards at least a first designated area estimated to cover the at least one eye of the subject. Image registering means registers light from the at least one light beam having been reflected against the subject. The resulting data is produced in response to these light reflections, which resulting data represents movements of the at least one eye of the subject.
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