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Self-adapting sightline tracking system

A technology of eye tracking and tracking system, which is applied to the parts of TV system, TV, color TV, etc. It can solve the problems of lower limit and low precision, and achieve the effect of improving efficiency and precision

Inactive Publication Date: 2013-04-24
TIANJIN NORMAL UNIVERSITY
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AI Technical Summary

Problems solved by technology

Software-based eye-tracking technology greatly reduces the restrictions on users. The user's head can move, but its accuracy is relatively low

Method used

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  • Self-adapting sightline tracking system

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Embodiment Construction

[0030] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] figure 1 It is a structural block diagram of the adaptive gaze tracking system of the present invention. Such as figure 1 As shown, the adaptive line of sight tracking system of the present invention includes a CCD camera, an image acquisition card, and a computer connected to each other through data lines; the CCD camera is arranged on the camera pan-tilt. The CCD camera is equipped with a zoom lens with motorized continuous variable focal length.

[0032] CCD refers to charge-coupled image sensor. In the system, the CCD camera is placed on the camera platform, which can scan two-dimensionally and adapt to the change of the head position; the objective lens of the CCD is a zoom lens with a variable focal length, which relies on the two lens groups of the zoom group and the compensation group. Move along the direction of the optica...

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Abstract

The invention discloses a self-adapting sightline tracking system and a tracking method. A human eye image is collected to a computer by a charge coupled device (CCD) camera, and eye fixation point coordinates can be obtained through steps of image preprocessing, pupil periphery point extracting, ellipse fitting and the like. A theoretical model and an experimental device of the self-adapting sightline tracking system are set up, wherein the theoretical model and the experimental device are combined with software and hardware and are suitable for the condition that the head rotates, and high-precision sightline tracking under a non-interfering condition for a user is achieved. In order to overcome affection of movements of the head in sightline tracking technology, the self-adapting sightline tracking method based on multi-scale geometric analysis and faced with the condition of head moving is utilized. A multi-scale geometric analysis tool is introduced to the field of sightline tracking, a high-precision detecting algorithm of image characteristics of human eyes and faces based on Directionlet change is utilized so as to improve detecting efficiency and precision of human eye edges. A neural network and a genetic algorithm are combined so as to study the relation of the image characteristics of the human eyes and the faces and nonlinear mapping of eye fixation points and raise a new method of sightline direction detection.

Description

[0001] This project was supported by the Doctoral Fund of Tianjin Normal University, grant number: 52X09008. technical field [0002] The invention belongs to the technical field of man-machine interface, and in particular relates to an adaptive line of sight tracking system. Background technique [0003] Gaze tracking technology is one of the key technologies of the future intelligent human-computer interface, and has broad application prospects in the field of human-computer interaction. Eye gaze is a very good candidate input channel that can make man-machine dialogue easy and natural. Using human eyes as the input medium, multitasking operation can be realized by controlling external devices through eye gaze. In some industrial control , robotics and clinical medicine have broad prospects for development. [0004] Gaze tracking is to determine the direction of the user's gaze based on the characteristics and position of the eyes and some other facial clues, and obtain t...

Claims

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Application Information

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IPC IPC(8): H04N5/232G06K9/00
Inventor 周欣刘瑞安王为
Owner TIANJIN NORMAL UNIVERSITY
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