CN102028577B - Intelligent eye vision protection system - Google Patents
Intelligent eye vision protection system Download PDFInfo
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- CN102028577B CN102028577B CN201010521107A CN201010521107A CN102028577B CN 102028577 B CN102028577 B CN 102028577B CN 201010521107 A CN201010521107 A CN 201010521107A CN 201010521107 A CN201010521107 A CN 201010521107A CN 102028577 B CN102028577 B CN 102028577B
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Abstract
The invention relates to an intelligent eye vision protection system which comprises an image pre-processing module A, a face processing module B, an eye region positioning module C, an eye tracking forecast module D, a fatigue state detection module E, a fatigue degree calculation module F, a display equipment backlight brightness control module G and a prompt menu module H. The intelligent eye vision protection system can detect the degree of fatigue of users, automatically micro-adjust the brightness of a display equipment screen, gives a prompt of the current metal state of the users, and reminds the users of having a rest so as to achieve the effect of eye vision protection.
Description
Technical field
The present invention relates to a kind of eye eyesight intelligent protection system, be applied to liquid crystal display, liquid crystal TV set, mobile phone, all display devices such as game machine.
Background technology
The user of present display device generally all is that hobby, use scene, the result of use according to oneself manually adjusted the screen intensity size through menu; Mental status that can't be current according to user; Like eyestrain; And the brightness of turning down screen automatically realizes the effect of protection eyes to adapt to current eyestrain situation.Therefore, how addressing the above problem is research purpose of the present invention.
Summary of the invention
The object of the present invention is to provide a kind of eye eyesight intelligent protection system, the present invention can realize can protecting the safety of user eyesight to the Based Intelligent Control according to the fatigue strength self adaptation conditioning equipment screen intensity of display device user, again can energy savings.
The invention is characterized in: a kind of eye eyesight intelligent protection system comprises image pre-processing module A, facial processing module B; Eye areas locating module C; Eye tracking prediction module D, fatigue state detection module E calculates degree of fatigue module F; Control display device backlight illumination module G and prompting menu module H; It is characterized in that: gather the coherent image that user uses display device in real time with a photographic head, said image pre-processing module A carries out the image pretreatment, mainly is to carry out illumination compensation for the uneven picture of brightness of image; Said facial processing module B looks for colour of skin part based on the YCbCr color space, utilizes the mode of projection to take out face area; In the face area of new taking-up; Said eye areas locating module C utilizes the geometric distribution in " five in three front yards "; Eye areas is confirmed in projection through level and vertical both direction, carries out detection and location in eye areas, marks eye areas as the eyes template with rectangle; Said eye tracking prediction module D proposes the module of eyes from previous frame, use based on the Unscented kalman filtering method UKF of Kalman filter the eye position of next frame is carried out predicting tracing; Wherein the location of face and tracking are as eyes; Said fatigue state detection module E mainly comprises two aspects: whether the state that detects eyes and face conformance with standard; Wherein the face fatigue detecting is to utilize the ratio of width to height of face and yawning duration T to judge whether user is in fatigue state; And utilize the PERCLOS method to detect eyestrain; Refer to the shared time ratio more than 80% of eyes closed in the unit interval based on the PERCLOS method, detect eyestrain degree; Said calculating degree of fatigue module F is through merging the tired calculation of parameter overall fatigue degree value of face and eyes; Said control display device backlight illumination module G and prompting menu module H control brightness size backlight automatically and show the corresponding prompt message menu according to degree of fatigue, realize protecting the function of eye eyesight and the intelligence system that a kind of detecting real-time user mental attitude is reminded rest automatically.
Advantage of the present invention: the present invention can detect the user degree of fatigue and realize the brightness of automatic fine tuning display device screen, and the current mental status of prompting user, reminds and has a rest, and reaches the effect of protection eye eyesight
Description of drawings
Fig. 1 is the flow chart of the embodiment of the invention.
Fig. 2 is an illumination compensation algorithm flow chart of the present invention.
Fig. 3 is eye location of the present invention and trace flow figure.
Fig. 4 is the present invention testing process figure that yawns.
Fig. 5 opens curve for face of the present invention.
Fig. 6 is a PERCLOS measuring principle of the present invention.
Fig. 7 is relevant for PERCLOS of the present invention and tired grade.
Fig. 8 calculates degree of fatigue for the present invention.
Fig. 9 is a control flow of the present invention.
Figure 10 points out menu for the present invention.
The specific embodiment
With reference to figure 1, Fig. 2, Fig. 3, Fig. 4; Fig. 5, Fig. 6, Fig. 7, Fig. 8; Fig. 9 and Figure 10, a kind of eye eyesight intelligent protection system comprises image pre-processing module A, facial processing module B; Eye areas locating module C, eye tracking prediction module D, fatigue state detection module E calculates degree of fatigue module F; Control display device backlight illumination module G and prompting menu module H gather the coherent image that user uses display device in real time with a photographic head, and said image pre-processing module A carries out the image pretreatment, mainly is to carry out illumination compensation for the uneven picture of brightness of image; Said facial processing module B looks for colour of skin part based on the YCbCr color space, utilizes the mode of projection to take out face area; In the face area of new taking-up; Said eye areas locating module C utilizes the geometric distribution in " five in three front yards "; Eye areas is confirmed in projection through level and vertical both direction, carries out detection and location in eye areas, marks eye areas as the eyes template with rectangle; Said eye tracking prediction module D proposes the module of eyes from previous frame, use based on the Unscented kalman filtering method UKF of Kalman filter the eye position of next frame is carried out predicting tracing; Wherein the location of face and tracking are as eyes; Said fatigue state detection module E mainly comprises two aspects: whether the state that detects eyes and face conformance with standard; Wherein the face fatigue detecting is to utilize the ratio of width to height of face and yawning duration T to judge whether user is in fatigue state; And utilize the PERCLOS method to detect eyestrain; Refer to the shared time ratio more than 80% of eyes closed in the unit interval based on the PERCLOS method, detect eyestrain degree; Said calculating degree of fatigue module F is through merging the tired calculation of parameter overall fatigue degree value of face and eyes; Said control display device backlight illumination module G and prompting menu module H control brightness size backlight automatically and show the corresponding prompt message menu according to degree of fatigue, realize protecting the function of eye eyesight and the intelligence system that a kind of detecting real-time user mental attitude is reminded rest automatically.
On display device, installing or place a photographic head aside, gather the coherent image that user uses display device in real time, carry out the image pretreatment, mainly is to carry out illumination compensation for the uneven picture of brightness of image.
The YCbCr color space information of available this image, and the colour of skin scope of setting suitable CbCr is with the image binaryzation with face's part, and take out face area among the image with the mode of projection.
In the face area of new taking-up, eye areas locating module C utilizes the geometric distribution in " five in three front yards ", confirms eye areas through the projection of level and vertical both direction.Carry out detection and location in eye areas, mark eye areas as the eyes template with rectangle.
Above-mentioned eye tracking prediction module D adopts the Unscented kalman filtering method UKF based on Kalman filter that the user eyes are followed the tracks of.
Above-mentioned fatigue state detection module E mainly comprises two aspects: whether the state that detects eyes and face conformance with standard, and the face fatigue detecting is to utilize the ratio of width to height of face and yawning duration T to judge whether user is in fatigue state; Utilize the PERCLOS method to detect eyestrain, refer to the shared time ratio more than 80% of eyes closed in the unit interval, detect eyestrain degree based on the PERCLOS method.
Aforementioned calculation degree of fatigue module F merges face yawn duration T and eyes PERCLOS value calculating degree of fatigue, refers to the shared time ratio more than 80% of eyes closed in the unit interval based on the PERCLOS method, detects eyestrain degree.
Above-mentioned control display device backlight illumination module G draws G-value according to calculating degree of fatigue module F, the backlight illumination output size of adjustment display device.
The practical implementation process is following:
One, image pre-processing module A
On display device, installing or place a photographic head aside, gather the coherent image that user uses display device in real time, carry out the image pretreatment, mainly is to carry out illumination compensation for the uneven picture of brightness of image, particular flow sheet such as Fig. 2
Two, facial processing module B
Utilize the YCbCr color space information of this image, and the colour of skin scope of setting suitable CbCr is with the image binaryzation with face's part, and takes out face area among the image with the mode of projection.
Three, eye areas locating module C
In the face area of new taking-up, eye areas locating module C utilizes the geometric distribution in " five in three front yards ", confirms eye areas through the projection of level and vertical both direction.Carry out detection and location in eye areas, mark eye areas as the eyes template with rectangle.
Four, eye tracking prediction module D
Employing is followed the tracks of the user eyes based on the Unscented kalman filtering method UKF of Kalman filter.As shown in Figure 3.
Five, fatigue state detection module E
Mainly comprise two aspects: whether the state that detects eyes and face conformance with standard.The face fatigue detecting is to utilize the ratio of width to height of face and yawning duration T to judge whether user is in fatigue state.Utilize the PERCLOS method to detect eyestrain.
1, the face fatigue state detects
According to the architectural feature of people's face, be positioned at 2/3 position of people's face candidate region to the region of search of face, on the basis of face profile, whether the ratio of width to height after opening with face representes to have yawning behavior to occur.If aspect ratio value is excessive, explain that then face is closed state (stretching degree can not reach open degree when yawning when general face was spoken), if the value of being somebody's turn to do is smaller, explains that then face is in open configuration.Write down this and be worth rate over time,, explain that face is once opening action if the value of being somebody's turn to do is descending.Otherwise, explain that then face is carrying out closed action one time.As shown in Figure 4.
Yawning principal character is the open height of face considerably beyond the height of face during normal speaking, and can keep a period of time when surpassing normal face height.The persistent period of yawn can reflect the degree that user is tired.
Persistent period of yawning is expressed as through Fig. 5:
Defining the persistent period of yawning is that yawn began to the time of yawn end: T=t2-t1
If T is big more, the degree of fatigue of expression user is high more.
2, eyestrain detects
Refer to the shared time ratio more than 80% of eyes closed in the unit interval based on PERCLOS (P80) method, detect eyestrain degree.
As shown in Figure 6, measure the value of t1 ~ t4, calculate the PERCLOS value.
PERCLOS?=?（t3-t2）/(t4-t1)*100%
Wherein, T1 is that the eyes maximum is opened the closed used time of 80% pupil aperture; T2 is that the eyes maximum is opened the closed used time of 20% pupil aperture, and t3 is that the eyes maximum is opened the used time of 20% pupil aperture, and t4 is that the eyes maximum close is to opening the used time of 80% pupil aperture.
According to the PERCLOS value, assess tired grade, as shown in Figure 7
Six, calculate degree of fatigue module F
As shown in Figure 8, merge face yawn duration T and eyes PERCLOS value calculating degree of fatigue.
1, calculate the yawn degree of fatigue value G1 of duration T of face:
If T<2s, G1=0 branch; If 2s≤T<3s, G1=1 branch; If 3s≤T<4s, G1=2 branch; If T>=4s, the G1=3 branch;
2, the degree of fatigue value G2 of calculating eyes PERCLOS value:
If PERCLOS 20%, the G2=0 branch; If 20%≤PERCLOS 30%, the G2=1 branch; If 30%≤PERCLOS 50%, the G2=2 branch; If PERCLOS>50%, the G2=3 branch;
3, merge G1 and G2 and draw overall fatigue degree value G.
Seven, control display device backlight illumination module G
Draw G-value according to calculating degree of fatigue module F, the backlight illumination output size of adjustment display device.It is as shown in Figure 9,
Control flow is:
1, if the G=0 branch is explained the current waking state that is in of user, the display device operate as normal;
2, if < G≤2 minute, then a) prompting user: it is tired that you are in shallow degree at present, the suggestion rest in 0 minute;
B) to adjust backlight illumination automatically be original 80% to 5s;
3, if < G≤4 minute, then a) prompting user: you were in moderate fatigue at present, and suggestion is had a rest in 2 minutes;
B) to adjust backlight illumination automatically be original 50% to 5s;
4, if G >=5 minute, then a) prompting user: you are in degree of depth fatigue at present, and suggestion is had a rest;
B) close backlightly behind the 20s automatically, display device gets into power save mode.
Eight, prompting menu module H
Menu design is shown in figure 10.
The above is merely preferred embodiment of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (5)
1. an eye eyesight intelligent protection system comprises image pre-processing module A, facial processing module B; Eye areas locating module C; Eye tracking prediction module D, fatigue state detects E, calculates degree of fatigue module F; Control display device backlight illumination module G and prompting menu module H; It is characterized in that: gather the coherent image that user uses display device in real time with a photographic head, said image pre-processing module A carries out the image pretreatment, mainly is to carry out illumination compensation for the uneven picture of brightness of image; Said facial processing module B looks for colour of skin part based on the YCbCr color space, utilizes the mode of projection to take out face area; In the face area of new taking-up; Said eye areas locating module C utilizes the geometric distribution in " five in three front yards "; Eye areas is confirmed in projection through level and vertical both direction, carries out detection and location in eye areas, marks eye areas as the eyes template with rectangle; Said eye tracking prediction module D proposes the module of eyes from previous frame, with UKF the eye position of next frame is carried out predicting tracing; Wherein the location of face and tracking are as eyes; Said fatigue state detection module E mainly comprises two aspects: whether the state that detects eyes and face conformance with standard; Wherein the face fatigue detecting is to utilize the ratio of width to height of face and yawning duration T to judge whether user is in fatigue state, and utilizes the PERCLOS method to detect eyestrain; Said calculating degree of fatigue module F is through merging the tired calculation of parameter Total degree of fatigue of face and eyes; Said control display device backlight illumination module G and prompting menu module H control brightness size backlight automatically and show the corresponding prompt message menu according to degree of fatigue, realize protecting the function of eye eyesight and the intelligence system that a kind of detecting real-time user mental attitude is reminded rest automatically.
2. according to claims 1 described eye eyesight intelligent protection system; It is characterized in that: on display device, install or place a photographic head aside; Gather the coherent image that user uses display device in real time; Carrying out the image pretreatment, mainly is to carry out illumination compensation for the uneven picture of brightness of image.
3. according to claims 1 described eye eyesight intelligent protection system; It is characterized in that: the YCbCr color space information of available this image; And the colour of skin scope of setting suitable CbCr is with the image binaryzation with face's part, and takes out face area among the image with the mode of projection.
, according to claims 1 described eye eyesight intelligent protection system, it is characterized in that: said calculating degree of fatigue module F merges face yawn duration T and eyes PERCLOS value calculating degree of fatigue.
5. according to claims 1 described eye eyesight intelligent protection system, it is characterized in that: said display device backlight control module G draws G-value according to calculating degree of fatigue module F, the backlight illumination output size of adjustment display device.
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| CN201010521107A CN102028577B (en) | 2010-10-27 | 2010-10-27 | Intelligent eye vision protection system |
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| CN104391579A (en) * | 2014-12-08 | 2015-03-04 | 钟志刚 | Interactive eye protecting method of display equipment |
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| CN111699698A (en) * | 2019-10-12 | 2020-09-22 | 深圳海付移通科技有限公司 | Eye fatigue relieving method and intelligent terminal |
| CN112505930A (en) * | 2021-02-05 | 2021-03-16 | 宁波圻亿科技有限公司 | Optical correction device and wearing device |
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| CN114666523B (en) * | 2022-03-30 | 2023-10-27 | 湖南格为科技有限公司 | Energy-saving liquid crystal television capable of automatically adapting to human eye brightness |
| CN114822423A (en) * | 2022-05-20 | 2022-07-29 | 湖南星峰科技有限公司 | Liquid crystal display television and backlight adjusting method thereof |
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