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公开(公告)号：US20230101049A1
公开(公告)日：2023-03-30
申请号：US18062478
申请日：2022-12-06
Applicant: Tobii AB
Inventor： Per Fogelström , Anna Redz , Anders Dahl , Niklas Ollesson
Abstract: There is provided mechanisms for calibration of an eye tracking system. An eye tracking system comprises a pupil centre corneal reflection (PCCR) based eye tracker and a non-PCCR based eye tracker. A method comprises obtaining at least one first eye position of a subject by applying the PCCR based eye tracker on an image set depicting the subject. The method comprises calibrating a head model of the non-PCCR based eye tracker, as applied on the image set, for the subject using the obtained at least one first eye position from the PCCR based eye tracker as ground truth. The head model comprises facial features that include at least one second eye position. The calibrating involves positioning the head model in order for its at least one second eye position to be consistent with the at least one first eye position given by the PCCR based eye tracker.
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公开(公告)号：US12100176B2
公开(公告)日：2024-09-24
申请号：US18062478
申请日：2022-12-06
Applicant: Tobii AB
Inventor： Per Fogelström , Anna Redz , Anders Dahl , Niklas Ollesson
CPC classification number: G06T7/70 , G06V20/597 , G06V40/193 , G06T2207/30201
Abstract: There is provided mechanisms for calibration of an eye tracking system. An eye tracking system comprises a pupil centre corneal reflection (PCCR) based eye tracker and a non-PCCR based eye tracker. A method comprises obtaining at least one first eye position of a subject by applying the PCCR based eye tracker on an image set depicting the subject. The method comprises calibrating a head model of the non-PCCR based eye tracker, as applied on the image set, for the subject using the obtained at least one first eye position from the PCCR based eye tracker as ground truth. The head model comprises facial features that include at least one second eye position. The calibrating involves positioning the head model in order for its at least one second eye position to be consistent with the at least one first eye position given by the PCCR based eye tracker.
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公开(公告)号：US11144755B2
公开(公告)日：2021-10-12
申请号：US16367825
申请日：2019-03-28
Applicant: Tobii AB
Inventor： Jonas Sjöstrand , Anders Dahl , Mattias I Karlsson
Abstract: Methods and corresponding systems of controlling illuminators in an eye tracking system are disclosed. The system includes a first image sensor, a second image sensor, a first close illuminator arranged to capture bright pupil images by the first image sensor, a second close illuminator arranged to capture bright pupil images by the second image sensor and one or more far illuminators arranged to capture dark pupil images by the first image sensor and the second image sensor. In the methods main and support illuminators are controlled during exposure of a first and a second image sensor to produce enhanced contrast and glint position for eye/gaze tracking.
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公开(公告)号：US20210012157A1
公开(公告)日：2021-01-14
申请号：US16834153
申请日：2020-03-30
Applicant: Tobii AB
Inventor： Carl Asplund , Patrik Barkman , Anders Dahl , Oscar Danielsson , Tommaso Martini , Mårten Nilsson
Abstract: A method for training an eye tracking model is disclosed, as well as a corresponding system and storage medium. The eye tracking model is adapted to predict eye tracking data based on sensor data from a first eye tracking sensor. The method comprises receiving sensor data obtained by the first eye tracking sensor at a time instance and receiving reference eye tracking data for the time instance generated by an eye tracking system comprising a second eye tracking sensor. The reference eye tracking data is generated by the eye tracking system based on sensor data obtained by the second eye tracking sensor at the time instance. The method comprises training the eye tracking model based on the sensor data obtained by the first eye tracking sensor at the time instance and the generated reference eye tracking data.
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公开(公告)号：US20190303646A1
公开(公告)日：2019-10-03
申请号：US16367825
申请日：2019-03-28
Applicant: Tobii AB
Inventor： Jonas Sjöstrand , Anders Dahl , Mattias I. Karlsson
Abstract: Methods and corresponding systems of controlling illuminators in an eye tracking system are disclosed. The system includes a first image sensor, a second image sensor, a first close illuminator arranged to capture bright pupil images by the first image sensor, a second close illuminator arranged to capture bright pupil images by the second image sensor and one or more far illuminators arranged to capture dark pupil images by the first image sensor and the second image sensor. In the methods main and support illuminators are controlled during exposure of a first and a second image sensor to produce enhanced contrast and glint position for eye/gaze tracking.
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Patent Agency Ranking
公开(公告)号：US11568560B2
公开(公告)日：2023-01-31
申请号：US17242908
申请日：2021-04-28
Applicant: Tobii AB
Inventor： Per Fogelström , Anna Redz , Anders Dahl , Niklas Ollesson
Abstract: There is provided mechanisms for calibration of an eye tracking system. An eye tracking system comprises a pupil centre corneal reflection (PCCR) based eye tracker and a non-PCCR based eye tracker. A method comprises obtaining at least one first eye position of a subject by applying the PCCR based eye tracker on an image set depicting the subject. The method comprises calibrating a head model of the non-PCCR based eye tracker, as applied on the image set, for the subject using the obtained at least one first eye position from the PCCR based eye tracker as ground truth. The head model comprises facial features that include at least one second eye position. The calibrating involves positioning the head model in order for its at least one second eye position to be consistent with the at least one first eye position given by the PCCR based eye tracker.
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公开(公告)号：US11386290B2
公开(公告)日：2022-07-12
申请号：US16834153
申请日：2020-03-30
Applicant: Tobii AB
Inventor： Carl Asplund , Patrik Barkman , Anders Dahl , Oscar Danielsson , Tommaso Martini , Mårten Nilsson
IPC: G06K9/62 , G06V10/145 , G06V40/19
Abstract: A method for training an eye tracking model is disclosed, as well as a corresponding system and storage medium. The eye tracking model is adapted to predict eye tracking data based on sensor data from a first eye tracking sensor. The method comprises receiving sensor data obtained by the first eye tracking sensor at a time instance and receiving reference eye tracking data for the time instance generated by an eye tracking system comprising a second eye tracking sensor. The reference eye tracking data is generated by the eye tracking system based on sensor data obtained by the second eye tracking sensor at the time instance. The method comprises training the eye tracking model based on the sensor data obtained by the first eye tracking sensor at the time instance and the generated reference eye tracking data.
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公开(公告)号：US20210011550A1
公开(公告)日：2021-01-14
申请号：US16901905
申请日：2020-06-15
Applicant: Tobii AB
Inventor： Patrik Barkman , Anders Dahl , Oscar Danielsson , Tommaso Martini , Mårten Nilsson
Abstract: The disclosure relates to a method performed by a computer for identifying a space that a user of a gaze tracking system is viewing, the method comprising obtaining gaze tracking sensor data, generating gaze data comprising a probability distribution using the sensor data by processing the sensor data by a trained model and identifying a space that the user is viewing using the probability distribution.
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公开(公告)号：US11941172B2
公开(公告)日：2024-03-26
申请号：US17811000
申请日：2022-07-06
Applicant: TOBII AB
Inventor： Carl Asplund , Patrik Barkman , Anders Dahl , Oscar Danielsson , Tommaso Martini , Mårten Nilsson
CPC classification number: G06F3/013 , G01S7/282 , G01S7/4008 , G01S13/003 , G06F18/214 , G06V40/19 , G01S7/285
Abstract: A method for training an eye tracking model is disclosed, as well as a corresponding system and storage medium. The eye tracking model is adapted to predict eye tracking data based on sensor data from a first eye tracking sensor. The method comprises receiving sensor data obtained by the first eye tracking sensor at a time instance and receiving reference eye tracking data for the time instance generated by an eye tracking system comprising a second eye tracking sensor. The reference eye tracking data is generated by the eye tracking system based on sensor data obtained by the second eye tracking sensor at the time instance. The method comprises training the eye tracking model based on the sensor data obtained by the first eye tracking sensor at the time instance and the generated reference eye tracking data.
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公开(公告)号：US20210345923A1
公开(公告)日：2021-11-11
申请号：US17236846
申请日：2021-04-21
Applicant: Tobii AB
Inventor： Per Fogelström , Anna Redz , Anders Dahl , Niklas Ollesson
Abstract: There is provided mechanisms for eye position determination of a subject depicted in an image set. A method comprises obtaining first information indicating a first set of eye positions of the subject by applying a first eye tracking procedure on an image set depicting the subject. The first eye tracking procedure uses a first set of features extracted from the image set for obtaining the first set of eye positions. The method comprises obtaining second information indicating a second set of eye positions of the subject by applying a second eye tracking procedure on the image set depicting the subject. The second eye tracking procedure uses a second set of features extracted from the image set for obtaining the second set of eye positions. The method comprises determining the eye position of the subject in the image set based on the first information and the second information only when the first set of eye positions, as indicated by the first information, and the second set of eye positions, as indicated by the second information, differ from each other less than a threshold value.
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