CN101695110A - Method and device for controlling television - Google Patents
Method and device for controlling television Download PDFInfo
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Abstract
The invention provides a method and a device for controlling a television. The method includes: step 1, acquiring a video image of watching position in front of the television via a video acquisition apparatus, step 2, performing face detection on the video image and determining watching time of current viewers according to detection results, and step 3, performing time reminding operation according to watching time of the current viewers. The method and the device can determine actual watching time of viewers according to the face detection and perform accurate reminding of watching time, thereby resolving the technical problem that accurate reminding can not be achieved because actual watching time can not be determined accurately in the prior art.
Description
Technical field
The present invention relates to the TV control technology, particularly relate to a kind of method and apparatus of controlling television set.
Background technology
Television set is the very high household electrical appliance of utilance in the daily life, it not only provides the communication function of audio-visual information, the abundant entertainment that also provides, for example: fierce on-the-spot broadcasting competitive sports program can allow people that sensation on the spot in person has been arranged, and these programs have brought a lot of enjoyment for people's free life.
Yet, because the huge attraction of TV, because of too much watching TV and excessively closely watch TV the discomfort even the disease that are caused also more and more, and the intelligent reminding function is arranged seldom in the existing television system, even prompting is provided, also be to rely on viewing distance that viewing time that television set provides or transducer provide as Control Parameter.
And the viewing time that TV provides, the available machine time that generally is calculating is to the unused time, rather than the viewing time of people in face of television set, turn on the custom that television set is just done other things then because a lot of people have formed now once entering the door, the viewing time that therefore existing television set provides can not accurately reflect the user real be sitting in the time that program is watched in the TV front.And, some distance measuring sensors have been proposed also in some prior aries for viewing distance, and these generally all are infrared transducers, hot object is very big to its interference, is inaccurate.In addition, existing television set sees that for children TV also just adopts artificial behavior to be controlled, and the head of a family must stare at child constantly, allows the head of a family expend big energy like this.
Summary of the invention
The purpose of the embodiment of the invention provides a kind of method and apparatus of controlling television set, can detect by people's face and determine spectators' actual viewing time and carry out the prompting of viewing time accurately, solve the technical problem that prior art can not accurately be measured actual viewing time so that can not accurately remind.
To achieve these goals, on the one hand, provide a kind of method of controlling television set, comprised the steps:
Step 1 is by the video image of the viewing location before the video capture device acquisition television set;
Step 2 is carried out people's face to described video image and is detected, and determines current spectators' viewing time according to testing result;
Step 3 is carried out the time alarm operation according to described current spectators' viewing time.
Preferably, in the above-mentioned method, described step 3 specifically comprises:
If described viewing time surpasses very first time threshold value, then display reminding information on video screen; And/or,
If described current spectators' facial image is complementary with predetermined restriction beholder's image, and described viewing time surpasses described very first time threshold value, then closing television machine and television set carried out password locking.
Preferably, in the above-mentioned method,
In described step 1, described video capture device comprises first camera and second camera, described first camera is positioned at same level height with described second camera and is positioned at the same plane of parallel television screen, and described video image comprises first video image of described first camera generation and second video image that described second camera produces;
Also comprise after described step 2: the range finding step is used for: carry out the binocular range finding according to described first video image and described second video image, obtain the viewing distance between described current spectators and the described television set.
Preferably, in the above-mentioned method, described step 3 also comprises:
If described viewing distance surpasses distance threshold value, then display reminding information on video screen; And/or,
If described current spectators' facial image is complementary with predetermined restriction beholder's image, and the duration that described viewing distance surpasses described distance threshold value surpass the second time gate limit value, closing television machine and television set carried out password locking then.
Preferably, in the above-mentioned method, also comprise in the described step 2:
If do not detect facial image, then calculate the lasting duration that does not occur facial image in the described video image, if described lasting duration surpasses the 3rd time gate limit value, then carry out the unmanned pattern operation that nobody watches TV programme.
Preferably, in the above-mentioned method, described unmanned pattern is operating as: closing television machine or television set is transferred to silent mode.
Preferably, in the above-mentioned method, described range finding step specifically comprises:
Described first video image and described second video image are carried out smoothing processing and color normalized, obtain pretreated image;
Described pretreated image is carried out the image registration operation, obtain the parallax distance;
According to the actual range in the described parallax distance calculation stereoscopic vision, and with described actual range as described viewing distance.
Preferably, in the above-mentioned method, described actual range obtains by following formula:
Wherein, R is described actual range, and a is the distance between the optical centre of described first camera and described second camera, and f is a focal length, and x is described parallax distance, and Δ x is the adjustment parameter of parallax distance.
Preferably, in the above-mentioned method, described adjustment parameter obtains in the following way:
In described viewing location predetermined flag is set;
With measuring equipment described predetermined flag is accurately measured acquisition first measurement result;
By described first camera and described second camera described predetermined flag is carried out the binocular range finding, obtain second measurement result;
With described second measurement result of the described first measurement result correction, obtain described adjustment parameter.
Another aspect of the present invention provides a kind of device of controlling television set, comprises
Video capture device is used for: the video image that obtains the preceding viewing location of television set;
People's face detection module is used for: described video image is carried out people's face detect, determine current spectators' viewing time according to testing result;
Prompting module is used for: the viewing time according to described current spectators carries out the time alarm operation.
Preferably, in the above-mentioned device,
Described video capture device comprises first camera and second camera, described first camera is positioned at same level height with described second camera and is positioned at the same plane of parallel television screen, described first camera is used to produce first video image, second video image that described second camera is used to produce;
Described device also comprises: range finder module is used for: carry out the binocular range finding according to described first video image and described second video image, obtain the viewing distance between described current spectators and the described television set.
Preferably, in the above-mentioned device, described range finder module specifically comprises:
Pretreatment unit is used for: described first video image and described second video image are carried out smoothing processing and color normalized, obtain pretreated image;
Registration unit is used for: described pretreated image is carried out the image registration operation, obtain the parallax distance;
Computing unit is used for: according to the actual range of described parallax distance calculation stereoscopic vision, and with described actual range as described viewing distance.
There is following technique effect at least in the embodiment of the invention:
1) television equipment based on people's face detects and binocular vision is found range that proposes of the present invention has the characteristics of intellectual analysis, can obtain spectators' actual viewing time and viewing distance accurately;
2) television equipment based on detection of people's face and binocular vision range finding of the present invention's proposition can point out or cut out locking television according to viewing time or viewing distance, can effectively help some immoderate people to overcome some bad habits;
3) the advanced ranging technology based on the television equipment employing that people's face detects and binocular vision is found range of the present invention's proposition makes the stability of a system increase;
4) because carried out the facial image comparison, can identify children, so the television equipment based on people's face detects and binocular vision is found range that the present invention proposes can promote effectively that children form the custom of correctly watching TV, the protection children's is healthy.
Description of drawings
The flow chart of steps of the method that Fig. 1 provides for the embodiment of the invention;
The schematic diagram of the device that Fig. 2 provides for the embodiment of the invention;
The structure chart of the device that Fig. 3 provides for the embodiment of the invention.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention is clearer, specific embodiment is described in detail below in conjunction with accompanying drawing.
The flow chart of steps of the method that Fig. 1 provides for the embodiment of the invention, as shown in the figure, the method for control television set comprises:
More than be the control of only carrying out according to viewing time, the embodiment of the invention can also be controlled according to viewing distance, and is specific as follows:
In described step 101, described video capture device comprises first camera and second camera, described first camera is positioned at same level height with described second camera and is positioned at the same plane of parallel television screen, and described video image comprises first video image of described first camera generation and second video image that described second camera produces;
Also comprise after described step 102: the range finding step is used for: carry out the binocular range finding according to described first video image and described second video image, obtain the viewing distance between described current spectators and the described television set; Described range finding step specifically comprises: described first video image and described second video image are carried out smoothing processing and color normalized, obtain pretreated image; Described pretreated image is carried out the image registration operation, obtain the parallax distance; According to the actual range in the described parallax distance calculation stereoscopic vision, and with described actual range as described viewing distance.
In described step 103, also comprise: if described viewing distance surpasses distance threshold value, then display reminding information on video screen; And/or, if described current spectators' facial image is complementary with the restriction beholder's who is scheduled to image, and the duration that described viewing distance surpasses described distance threshold value surpasses the second time gate limit value, then closing television machine and television set carried out password locking.
The embodiment of the invention can also detect the state that does not have spectators, and is specific as follows:
In described step 102, if do not detect facial image, then calculate the lasting duration that does not occur facial image in the described video image, if described lasting duration surpasses the 3rd time gate limit value, then carry out the unmanned pattern operation that nobody watches TV programme.Described unmanned pattern is operating as: closing television machine or television set is transferred to silent mode.
The embodiment of the invention also provides a kind of device of controlling television set, the schematic diagram of the device that Fig. 2 provides for the embodiment of the invention, as shown in the figure, by intellectual analysis common people's viewing time and viewing distance, come the beholder is made corresponding prompting or some imperative operations at children and youth.The present invention adopts advanced human face detection tech to determine that the beholder whether in face of television set, utilizes the distance of binocular vision distance measurement function analyst face apart from television set then, and this device is installed on the television set top edge, and is very convenient, also do not affect the appearance.
The structure chart of the device that Fig. 3 provides for the embodiment of the invention.As shown in the figure, the device of control television set comprises:
Video capture device 310 is used for: the video image that obtains the preceding viewing location of television set;
People's face detection module 320 is used for: described video image is carried out people's face detect, determine current spectators' viewing time according to testing result;
Prompting module 330 is used for: the viewing time according to described current spectators carries out the time alarm operation.
Described video capture device comprises first camera and second camera, described first camera is positioned at same level height with described second camera and is positioned at the same plane of parallel television screen, described first camera is used to produce first video image, second video image that described second camera is used to produce;
Described device can also comprise: range finder module 340 is used for: carry out the binocular range finding according to described first video image and described second video image, obtain the viewing distance between described current spectators and the described television set.
Described range finder module 340 specifically comprises: pretreatment unit is used for: described first video image and described second video image are carried out smoothing processing and color normalized, obtain pretreated image; Registration unit is used for: described pretreated image is carried out the image registration operation, obtain the parallax distance; Computing unit is used for: according to the actual range of described parallax distance calculation stereoscopic vision, and with described actual range as described viewing distance.
Wherein, the computing formula of described actual range is:
Wherein, R is described actual range, and a is the distance between the optical centre of described first camera and described second camera, and f is a focal length, and x is described parallax distance, and Δ x is the adjustment parameter of parallax distance.
Described adjustment parameter obtains in the following way: in described viewing location predetermined flag is set; With measuring equipment described predetermined flag is accurately measured acquisition first measurement result; By described first camera and described second camera described predetermined flag is carried out the binocular range finding, obtain second measurement result; With described second measurement result of the described first measurement result correction, obtain described adjustment parameter.
Below the function of people's face detection module 320 and range finder module 340 is described in more detail.
(1) realization of people's face detection module 320.
People's face detects the method that adopts the statistics training classifier, and training aids adopts the training aids based on " Adaboost algorithm ", divides for people's face and non-face two large divisions with head part's image, obtains the Adaboost classifier parameters by a large amount of such sample trainings.The general step that people's face detects is:
A) image preliminary treatment comprises smoothly convergent-divergent;
B) integral image calculates;
C) various little feature calculation;
D) different scale detects and the merging reprocessing.
The present invention utilizes human face detection tech to detect people's existence, and human face detection tech is not the emphasis of invention.
Calculate unmanned viewing time, when detecting less than in face of the television set, camera have the people to exist, the program that sets in advance will be started, determine a time threshold, when unmanned viewing time surpasses this threshold value, to start intelligent shutoff device and whether determine the closing television machine or sound is transferred to minimum, when late-late the time, can effectively reduce the interference of sound that television set sends others.When having detected man-hour, timer is stopped and zero clearing, and start binocular vision range finder module 340, timer restarts when then waiting for next time nobody.
(2) realization of range finder module 340.
The present invention improves to some extent on the registration technology of this place's image.
Two cameras are installed on same height and same vertical plane.
A) image preliminary treatment
In order to reduce the interference of picture noise and other factors, at first image to be carried out smoothing processing, and two width of cloth images are carried out the normalized processing of color, process is as follows:
The image that two cameras are obtained all carries out the histogram equalization processing, and the transformation relation of establishing the first camera image histogram equalization is T1, and the transformation relation of the histogram equalization of second camera is T2, and normalized can be expressed as: T
1(u)=T
2(f (u))
B) image registration
For pretreated image, because image on installation accuracy and the difference of optical system, need carry out registration to obtain to measure accurately numerical value to image, distance measuring precision also will be closely related with registration accuracy, the present invention proposes a kind of new method for registering, as follows:
, as 4 pixel value being quantized with certain ratio of precision, is width with this precision, and all pixels are carried out re-quantization, quantizes the back pixel class and becomes 64 (are example with 4)
Its position of pixels statistics to all magnitudes of first image of first camera, and write down these positions, add up the variance of these positions in second image of second camera, equally second image also handled accordingly, two variance yields and for weighing the whether foundation of registration of image.
Search makes variance and be registration position for minimum position.
C) calculate distance
According to the position x that is registrated to is the parallax distance, calculates the actual range in the stereoscopic vision.
In the formula, R is an actual range, and a is two distances between the camera optical centre, and f is the focal length of optical device, x is two parallaxes between the camera, Δ x is a parallax apart from adjusting parameter, and this can adjust in practice, concrete method of adjustment, in scene, set special sign, measure with accurate measuring equipment then, then the method measurement result of measuring with binocular vision is revised, obtain this corrected parameter.
When measure people and television set apart from the time, will carry out a series of intelligent reminding, as:
1) people is too near apart from TV, will print relevant prompting message on screen;
2) calculate the time that the people watches TV,, will on video screen, print relevant information for too permanent watching
3) for children, the head of a family can pass through this function setting viewing distance and viewing time, when surpassing this distance or time, with automatic closing television machine, has only by unlock password and just can continue to watch.
As from the foregoing, the present invention is the defective that overcomes prior art, at first TV forefathers face target is detected, judge whether that the someone exists, open and nobody watches some Intelligent treatment measures of employing for a long time for television set, when detecting the someone and exist, according to beholder's distance and time method by the binocular vision range finding, come the Based Intelligent Control TV, the beholder is proposed some useful promptings or watches behavior to carry out some Based Intelligent Control to children are unconfined.
The embodiment of the invention has following advantage:
1) television equipment based on people's face detects and binocular vision is found range that proposes of the present invention has the characteristics of intellectual analysis, can obtain spectators' actual viewing time and viewing distance accurately;
2) television equipment based on detection of people's face and binocular vision range finding of the present invention's proposition can point out or cut out locking television according to viewing time or viewing distance, can effectively help some immoderate people to overcome some bad habits;
3) the advanced ranging technology based on the television equipment employing that people's face detects and binocular vision is found range of the present invention's proposition makes the stability of a system increase;
4) because carried out the facial image comparison, can identify children, so the television equipment based on people's face detects and binocular vision is found range that the present invention proposes can promote effectively that children form the custom of correctly watching TV, the protection children's is healthy.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (12)
1. a method of controlling television set is characterized in that, comprises the steps:
Step 1 is by the video image of the viewing location before the video capture device acquisition television set;
Step 2 is carried out people's face to described video image and is detected, and determines current spectators' viewing time according to testing result;
Step 3 is carried out the time alarm operation according to described current spectators' viewing time.
2. method according to claim 1 is characterized in that, described step 3 specifically comprises:
If described viewing time surpasses very first time threshold value, then display reminding information on video screen; And/or,
If described current spectators' facial image is complementary with predetermined restriction beholder's image, and described viewing time surpasses described very first time threshold value, then closing television machine and television set carried out password locking.
3. method according to claim 1 is characterized in that,
In described step 1, described video capture device comprises first camera and second camera, described first camera is positioned at same level height with described second camera and is positioned at the same plane of parallel television screen, and described video image comprises first video image of described first camera generation and second video image that described second camera produces;
Also comprise after described step 2: the range finding step is used for: carry out the binocular range finding according to described first video image and described second video image, obtain the viewing distance between described current spectators and the described television set.
4. method according to claim 3 is characterized in that, described step 3 also comprises:
If described viewing distance surpasses distance threshold value, then display reminding information on video screen; And/or,
If described current spectators' facial image is complementary with predetermined restriction beholder's image, and the duration that described viewing distance surpasses described distance threshold value surpass the second time gate limit value, closing television machine and television set carried out password locking then.
5. method according to claim 1 is characterized in that, also comprises in the described step 2:
If do not detect facial image, then calculate the lasting duration that does not occur facial image in the described video image, if described lasting duration surpasses the 3rd time gate limit value, then carry out the unmanned pattern operation that nobody watches TV programme.
6. method according to claim 5 is characterized in that, described unmanned pattern is operating as:
Closing television machine or television set is transferred to silent mode.
7. method according to claim 3 is characterized in that, described range finding step specifically comprises:
Described first video image and described second video image are carried out smoothing processing and color normalized, obtain pretreated image;
Described pretreated image is carried out the image registration operation, obtain the parallax distance;
According to the actual range in the described parallax distance calculation stereoscopic vision, and with described actual range as described viewing distance.
8. method according to claim 7 is characterized in that, described actual range obtains by following formula:
Wherein, R is described actual range, and a is the distance between the optical centre of described first camera and described second camera, and f is a focal length, and x is described parallax distance, and Δ x is the adjustment parameter of parallax distance.
9. method according to claim 8 is characterized in that, described adjustment parameter obtains in the following way:
In described viewing location predetermined flag is set;
With measuring equipment described predetermined flag is accurately measured acquisition first measurement result;
By described first camera and described second camera described predetermined flag is carried out the binocular range finding, obtain second measurement result;
With described second measurement result of the described first measurement result correction, obtain described adjustment parameter.
10. a device of controlling television set is characterized in that, comprises
Video capture device is used for: the video image that obtains the preceding viewing location of television set;
People's face detection module is used for: described video image is carried out people's face detect, determine current spectators' viewing time according to testing result;
Prompting module is used for: the viewing time according to described current spectators carries out the time alarm operation.
11. device according to claim 10 is characterized in that,
Described video capture device comprises first camera and second camera, described first camera is positioned at same level height with described second camera and is positioned at the same plane of parallel television screen, described first camera is used to produce first video image, second video image that described second camera is used to produce;
Described device also comprises: range finder module is used for: carry out the binocular range finding according to described first video image and described second video image, obtain the viewing distance between described current spectators and the described television set.
12. device according to claim 11 is characterized in that, described range finder module specifically comprises:
Pretreatment unit is used for: described first video image and described second video image are carried out smoothing processing and color normalized, obtain pretreated image;
Registration unit is used for: described pretreated image is carried out the image registration operation, obtain the parallax distance;
Computing unit is used for: according to the actual range of described parallax distance calculation stereoscopic vision, and with described actual range as described viewing distance.
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