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Line scan camera eye tracking system and method

A tracking system and line scanning technology, applied in the field of eye tracking systems, can solve the problems of relying on a single camera, unaffordable, difficult to maintain calibration, etc.

Inactive Publication Date: 2015-06-17
HONEYWELL INT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The second configuration, usually used in a lab environment, also exhibits disadvantages
In particular, it can also be difficult to maintain proper calibration if set in an environment with significant vibration, and relies on separate cameras for each eye
Servos may not be able to withstand vibrations in an aircraft cockpit, and a long focal length camera would need to be rigidly mounted to be sufficiently accurate in a vibratory environment, increasing servo size and power
[0005] The third configuration has a significantly limited accuracy and field of view in the current state of the art, both due to the very limited angular resolution of the acquired images

Method used

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Embodiment Construction

[0015] The following detailed description is merely exemplary in nature and is not intended to limit the invention or the application and uses of the invention. As used herein, the word "exemplary" means "serving as an example, instance, or illustration." Thus, any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. All embodiments described herein are exemplary embodiments provided to enable persons skilled in the art to make or use the invention and not to limit the scope of the invention as defined by the claims. Furthermore, there is no intention to be bound by any expressed or implied theory presented in the preceding technical field, background, brief summary or the following detailed description.

[0016] refer to figure 1 , a functional block diagram of one embodiment of an eye tracking system 100 is depicted and includes a line scan camera 102 , an optical reflector 104 and a processor 10...

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Abstract

A system and method for determining positions of one or more eyes in a three-dimensional volume includes rotating an optical reflector within a linear field of view of a line scan camera to allow the line scan camera to capture image data of a two-dimensional projection within the three-dimensional volume, and processing the image data captured by the line scan camera to determine the positions of the one or more eyes.

Description

technical field [0001] The present invention relates generally to eye tracking systems, and more particularly to eye tracking systems and methods using line scan cameras. Background technique [0002] Presently known eye or gaze tracking systems are typically implemented using one of three general configurations. The first configuration utilizes a head mounted camera pointed directly at the eye. The second configuration uses a set of one or more fixed-mounted overview cameras and a servo-controlled telephoto camera directed at the eye. A third configuration uses a single fixed mounted camera. [0003] In general, the first configuration is significantly less complex than the second, but it does exhibit certain disadvantages. For example, it can be difficult to maintain proper calibration, since even slight movement of the camera relative to the eye can cause relatively large estimation errors. Head mounted cameras may also be uncomfortable to wear and may obstruct the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/14H04N5/341H04N5/225
CPCA61B3/113G02B26/12H04N1/113H04N1/193G02B27/0093G06F3/013G06V40/19H04N23/55H04N23/61H04N25/701
Inventor O. 科塔巴
Owner HONEYWELL INT INC