Tobii Ab

Tobil Ab

Magnus Ivarsson

Niklas Ollesson

Anna Redz

Viktor Åberg

David Masko

Mårten Skogö

Peter Blixt

Henrik Jönsson

Per-Edvin Stoltz

Erland George-Svahn

Dineshkumar Muthusamy

Dimitrios Koufos

Anna Larsen Redz

There is provided a method, system, and non-transitory computer-readable storage medium for controlling the exposure settings of an rolling shutter image sensor device with global reset. This is achieved by obtaining a first image captured by the image sensor device at a current exposure setting that comprises a partial readout parameter representing a number image parts for partial readout by the image sensor device; determining an intensity value of the first image, comparing the intensity value of the first image to a desired intensity value. If the intensity values differ more than an allowed deviation, an updated number of image parts for partial readout is determined based on the current number of image parts and the intensity value of the first image. Thereafter, the current exposure setting is updated by setting the value of the partial readout parameter to the updated number of image parts.

Controlling settings of an image sensor device in an eye tracking system

A method including providing a sensor device including one or several sensors. The sensor device is arranged to perform at least one high-power type measurement and at least one low-power type measurement and includes at least one image sensor arranged to depict a person by a measurement of said high-power type. Each of the low-power type measurements over time requires less electric power for operation as compared to each of the high-power type measurements. The method includes detecting a potential presence of the person using at least one of said low-power type measurements. The method includes producing, using one of the high-power type measurements, an image depicting a person and detecting a presence of the person based on im-age analysis of the image. The method includes detecting, using at least one of the low-power type measurements, a maintained presence of the person. The method includes failing to detect a maintained presence of the person.

Method and system for detecting physical presence

There is provided a method, system, and non-transitory computer-readable storage medium for controlling an eye tracking system () to obtain a first image () captured under active illumination by at least one infrared, IR, illuminator () associated with the eye tracking system () and at a current exposure setting, using the image sensor device (); and, if at least one eye () is depicted in the first image (): define at least one region of interest, ROI, () from the first image () comprising a group of pixels in the first image () representing at least a part of the depicted at least one eye (); determine a respective intensity value for each of the at least one ROI (); determine a second exposure setting by adjusting at least one exposure parameter of the image sensor device () based on the determined intensity value, or values, for the at least one ROI (); and set the current exposure setting to the second exposure setting.

Method and system for controlling an eye tracking system

A computer implemented method for controlling read-out from a digital image sensor device, comprising a plurality of pixels, the method comprising the steps of setting a first read-out scheme, based on a first level of pixel binning and/or pixel skipping, reading, based on the first read-out scheme, from the digital image sensor device, a first image, determining an exposure value for the first image, based on the intensity value of each one of the first plurality of regions of the first image and comparing the exposure value with a predetermined maximum value. A second read-out scheme based on a second level of pixel binning and/or pixel skipping is set. The level of pixel binning and/or pixel skipping in the second read-out scheme is increased compared to the first read-out scheme, if the exposure value is higher than the predetermined maximum value. Based on the second read-out scheme, a subsequent second image is read. A system configured to perform the method is also described.

Method for controlling read-out from a digital image sensor

There is provided a method, system, and non-transitory computer-readable storage medium for performing three-dimensional, 3D, position estimation for the cornea center of an eye of a user, using a remote eye tracking system, wherein the position estimation is reliable and robust also when the cornea center moves over time in relation to an imaging device associated with the eye tracking system. This is accomplished by generating, using, and optionally also updating, a cornea movement filter, CMF, in the cornea center position estimation.

Method and system for 3D cornea position estimation

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.

Image sensor for vision based on human computer interaction

There is provided a method, system, and non-transitory computer-readable storage medium for controlling an eye tracking system to optimize eye tracking performance under different lighting conditions, by obtaining a first image captured using a camera associated with the eye tracking system, the first image comprising at least part of an iris and at least part of a pupil of an eye illuminated by an illuminator associated with the eye tracking system at a current power of illumination selected from a set of predetermined power levels; determining a contrast value between an the iris and the pupil in the image; and, if the contrast value deviates less than a preset deviation threshold value from a preset minimum contrast value, setting the current power of illumination of the illuminator to the other predetermined power level in the set of predetermined power levels.

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Danderyd, Sweden

Magnus Ivarsson