CN203027358U - Adaptive sight line tracking system - Google Patents
Adaptive sight line tracking system Download PDFInfo
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- CN203027358U CN203027358U CN 201320029504 CN201320029504U CN203027358U CN 203027358 U CN203027358 U CN 203027358U CN 201320029504 CN201320029504 CN 201320029504 CN 201320029504 U CN201320029504 U CN 201320029504U CN 203027358 U CN203027358 U CN 203027358U
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Abstract
The utility model discloses an adaptive sight line tracking system. The adaptive sight line tracking system comprises a CCD (charge coupled device) camera, an image acquisition card and a computer, which are mutually connected via data wires, wherein the CCD camera is arranged on a camera holder; and the CCD camera is provided with a zoom lens with a power-driven continuously variable focus. The adaptive sight line tracking system disclosed by the utility model has an adaptive capability to the light intensity change of an external environment and the position change of the head of a user; the cumbersome work of manual adjustment is avoided and the accuracy of the adjustment is improved; compared with the existing majority of focusing systems, the adaptive sight line tracking system has the advantages that a moving object can be collimated, tracked and automatically focused; the camera can be used for tracking eyes and capturing the sharp images of the eyes in a small view field in real time according to an automatic adjustment for the images of the head and the shoulders in a large view field; the adaptive sight line tracking system is adaptive to different light intensity conditions; and the adaptive sight line tracking system can be applied to a real-time system.
Description
This project obtains the doctor of Tianjin Normal University fund assistance, subsidizes number: 52X09008.
Technical field
The utility model belongs to the human-machine interface technology field, relates to specifically a kind of adaptive line of sight tracking system.
Background technology
Visual Trace Technology is one of key technology of following Intelligent Human-Machine Interface, has broad application prospects in field of human-computer interaction.Eye fixation is a kind of extraordinary candidate's input channel that can make human-computer dialogue become easy, natural, with people's eyes as the input medium, stare to look external equipment is controlled by eyes and can realize multi-job operation, development prospect is widely arranged on some Industry Control, robotics and clinical medicine.
Eye tracking is the direction that decides the user to watch attentively according to the feature of eyes and position and some other face clue, obtains user's intention.As the important branch of human-computer interaction technology, Visual Trace Technology is mainly studied detection and the identification to mankind's eye motion characteristic, realizes the automatic control to other function systems.The great advantage of this technology is to realize control to external equipment by eye gaze, and then realizes multi-job operation, military and civilian on have broad application prospects.
Visual Trace Technology can be divided into take hardware as the basis and take software as the basis two kinds.Method take hardware as the basis needs the user to put on the special helmet, be placed in the video camera on the user crown or use head fixing bracket etc., and is very large to user's interference.In order to overcome sight tracking device to people's interference effect, the researcher proposed with software realize to the glitch-free sight tracing of user.Its basic functional principle is first to utilize video camera to obtain human eye or face image, then realizes location and the tracking of people's face and human eye in image with software, thereby the estimation user watches the position attentively on screen.Take the Visual Trace Technology of software as the basis, user's restriction is reduced greatly, user's head can move, but its precision is relatively low.How under the prerequisite of interference user not, obtaining to watch accurately focus attentively is the major issue that the Visual Trace Technology related researcher need to solve.But existing Visual Trace Technology exists not high the reaching of system accuracy to limit the too much deficiency that waits to the user mostly.
Summary of the invention
The utility model is in order to solve the problems of the prior art, and a kind of adaptive line of sight tracking system is provided.
Technical solution adopted in the utility model is:
Adaptive line of sight tracking system of the present utility model comprises by the interconnective ccd video camera of data wire, image pick-up card and computer; Ccd video camera is arranged on camera pan-tilt.
Described ccd video camera is equipped with the zoom lens of electronic continuous variable focal length.
CCD refers to electric charge coupled mode imageing sensor.
Advantage of the present utility model and beneficial effect are:
Adaptive line of sight tracking system of the present utility model can have adaptive ability to outside environmental light intensity variation, the variation of user's head position.Avoid the loaded down with trivial details of manual adjustment and improved the accuracy of regulating.Compare with the most focusing system, have the following advantages:
1. can aim at, follow the tracks of and automatic focusing moving target.Video camera can be by the head shoulder images under large visual field by automatically regulating, and the real-time tracking eyes also capture eyes picture rich in detail under small field of view.
2. can adapt to different illumination conditions.
3. can be applicable in real-time system.
Description of drawings
Fig. 1 is the structured flowchart of adaptive line of sight tracking system of the present utility model;
Fig. 2 is the schematic diagram of adaptive line of sight tracking system of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is elaborated.
Fig. 1 is the structured flowchart of adaptive line of sight tracking system of the present utility model.As shown in Figure 1, adaptive line of sight tracking system of the present utility model comprises by the interconnective ccd video camera of data wire, image pick-up card and computer; Ccd video camera is arranged on camera pan-tilt.Ccd video camera is equipped with the zoom lens of electronic continuous variable focal length.
CCD refers to electric charge coupled mode imageing sensor.In system, ccd video camera is placed on camera pan-tilt, can do two-dimensional scan, adapts to head position and changes; The objective lens of CCD is to adopt pancratic zoom lens, to rely on zoom group and compensation to organize these two set of lenses to change the size of focal length along the movement of optical axis direction, thereby change object lens to multiplication factor and the angle of visual field of target, reach the purpose of continuous adjusting range of observation, adapt to head in the motion of depth of field direction.
Fig. 2 is the schematic diagram of adaptive line of sight tracking system of the present utility model.As shown in Figure 2, the eye image that the CCD video camera is caught is transferred to computer, after video image being carried out the images processing such as preliminary treatment and characteristic key, extracts pupil center location information, and then estimates the eye sight line direction.
High quality graphic is based on the basis that image is processed Visual Trace Technology, and the utility model adopts self-regulation mobile platform and electronic continuous three variable C CD object lens, with the impact of compensation head movement generation; Excessive for preventing the head movement scope, cause eyes to run out of the field range of ccd video camera, design uses camera pan-tilt to make ccd video camera energy scan tracing user's eyes.Because people's inner eye corner point is very stable, the variation of human face expression can not cause that basically its position changes, therefore in the human eye video image that video camera is captured, the distance of two inner eye corners is as judgment basis, regulate the focal length of camera lens, the optical imaging system magnification ratio is remained unchanged, realize automatic focus and adjust image brightness according to the characteristics of image that extracts, consist of the feedback control system of closed loop.
The course of work of the present utility model is as follows: computer collects a series of digital picture by zoom lens and image pick-up card, and each two field picture is processed in real time.At first adjust aperture according to gradation of image information; Aperture according to facula information in image, judges whether focal length is suitable after determining, drive the zoom motor and make varifocus objective come adjusting focal length to long Jiao or short burnt direction corresponding sports, and the control The Cloud Terrace aims at, tracking target; Utilize at last focusing operator, accurately whether judgement focus on, whether imaging is clear, and provide feedback signal and control the motion of camera lens and realize automatic focus, obtains clear eye image.
Adaptive line of sight tracking system of the present utility model can have adaptive ability to outside environmental light intensity variation, the variation of user's head position.Avoid the loaded down with trivial details of manual adjustment and improved the accuracy of regulating.Compare with the most focusing system, have the following advantages: the first, can aim at, follow the tracks of and automatic focusing moving target.Video camera can be by the head shoulder images under large visual field by automatically regulating, and the real-time tracking eyes also capture eyes picture rich in detail under small field of view.The second, can adapt to different illumination conditions.The 3rd, can be applicable in real-time system.
Claims (2)
1. adaptive line of sight tracking system, it is characterized in that: this system comprises by the interconnective ccd video camera of data wire, image pick-up card and computer; Ccd video camera is arranged on camera pan-tilt.
2. adaptive line of sight tracking system according to claim 1, it is characterized in that: ccd video camera is equipped with the zoom lens of electronic continuous variable focal length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320029504 CN203027358U (en) | 2013-01-21 | 2013-01-21 | Adaptive sight line tracking system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320029504 CN203027358U (en) | 2013-01-21 | 2013-01-21 | Adaptive sight line tracking system |
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| CN203027358U true CN203027358U (en) | 2013-06-26 |
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| CN 201320029504 Expired - Fee Related CN203027358U (en) | 2013-01-21 | 2013-01-21 | Adaptive sight line tracking system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103591953A (en) * | 2013-11-20 | 2014-02-19 | 无锡赛思汇智科技有限公司 | Personnel location method based on single camera |
| CN104506773A (en) * | 2014-12-22 | 2015-04-08 | 天津市亚安科技股份有限公司 | Camera automatic zoom control method based on human eye distance |
| WO2015144039A1 (en) * | 2014-03-24 | 2015-10-01 | 杨建军 | Lens-adjustable driving assembly in holder |
| CN105493147A (en) * | 2013-08-27 | 2016-04-13 | 高通股份有限公司 | Systems, devices and methods for tracking objects on a display |
| CN112839162A (en) * | 2019-11-25 | 2021-05-25 | 七鑫易维(深圳)科技有限公司 | Method, device, terminal and storage medium for adjusting eye display position |
| CN112835444A (en) * | 2019-11-25 | 2021-05-25 | 七鑫易维(深圳)科技有限公司 | Method, device and equipment for adjusting use angle of eye control all-in-one machine and storage medium |
| CN113473015A (en) * | 2021-06-08 | 2021-10-01 | 荣耀终端有限公司 | Holder control method and electronic equipment |
-
2013
- 2013-01-21 CN CN 201320029504 patent/CN203027358U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105493147A (en) * | 2013-08-27 | 2016-04-13 | 高通股份有限公司 | Systems, devices and methods for tracking objects on a display |
| CN103591953A (en) * | 2013-11-20 | 2014-02-19 | 无锡赛思汇智科技有限公司 | Personnel location method based on single camera |
| CN103591953B (en) * | 2013-11-20 | 2016-08-17 | 无锡赛思汇智科技有限公司 | A kind of personnel positioning method based on single camera |
| WO2015144039A1 (en) * | 2014-03-24 | 2015-10-01 | 杨建军 | Lens-adjustable driving assembly in holder |
| CN104506773A (en) * | 2014-12-22 | 2015-04-08 | 天津市亚安科技股份有限公司 | Camera automatic zoom control method based on human eye distance |
| CN112839162A (en) * | 2019-11-25 | 2021-05-25 | 七鑫易维(深圳)科技有限公司 | Method, device, terminal and storage medium for adjusting eye display position |
| CN112835444A (en) * | 2019-11-25 | 2021-05-25 | 七鑫易维(深圳)科技有限公司 | Method, device and equipment for adjusting use angle of eye control all-in-one machine and storage medium |
| CN112839162B (en) * | 2019-11-25 | 2022-12-02 | 七鑫易维(深圳)科技有限公司 | Method, device, terminal and storage medium for adjusting eye display position |
| CN113473015A (en) * | 2021-06-08 | 2021-10-01 | 荣耀终端有限公司 | Holder control method and electronic equipment |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130626 Termination date: 20140121 |