CN101033955B - Method, device and display for implementing eyesight protection - Google Patents
Method, device and display for implementing eyesight protection Download PDFInfo
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- CN101033955B CN101033955B CN2007100984956A CN200710098495A CN101033955B CN 101033955 B CN101033955 B CN 101033955B CN 2007100984956 A CN2007100984956 A CN 2007100984956A CN 200710098495 A CN200710098495 A CN 200710098495A CN 101033955 B CN101033955 B CN 101033955B
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 230000004438 eyesight Effects 0.000 title claims abstract description 25
- 230000004224 protection Effects 0.000 title claims abstract description 19
- 238000010606 normalization Methods 0.000 claims description 16
- 230000005540 biological transmission Effects 0.000 claims description 14
- 238000012423 maintenance Methods 0.000 claims description 8
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- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000006378 damage Effects 0.000 abstract description 2
- 230000000007 visual effect Effects 0.000 abstract 1
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- 238000002604 ultrasonography Methods 0.000 description 3
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- 208000027418 Wounds and injury Diseases 0.000 description 1
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- 230000001815 facial effect Effects 0.000 description 1
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- 238000003384 imaging method Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000036651 mood Effects 0.000 description 1
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Abstract
This invention discloses a method, a device and a monitor to protect the eyesight. It solves the problem of the poor effect on the eyesight protect of the visual protection device in the existed technology and the problem of the inaccuracy of reminding information. This invention applied to send remind information of keeping a certain distance to the users includes this following process: A. Acquire image includes the user eyes through image acquisition equipment, and calculate the pixel distance between eyes in the above images. B. send the remind messages to the users when the pixel distance greater than or equal to a predetermined threshold value. This invention discloses a device and a monitor as a device to protect the eye-sight. It is used to r Remind users to maintain a certain distance from target so that there is no harm to the eyes caused by the too short distance from target.
Description
Technical field
The present invention relates to electronic technology field, relate in particular to a kind of method, device and a kind of display of realizing sight protectio.
Background technology
People obtain 80% of information and come from eyes, and along with popularizing of computer and TV, increasing people need watch display for a long time, if range display is too near, can cause the infringement to eyesight, therefore, increasing people is because closely watch display and myopia for a long time.
Prior art exists the device of some vision protections, comes the mode of distance between the Measuring Object comprising sensors such as adopting mechanical system Measuring Object distance and employing infrared ray.
Adopt the mode of mechanical system Measuring Object distance, need the people to wear the device of some similar headgears, limit the distance of people by tie bar space apart from book or display, these devices can allow the people that discomfort is arranged, mood in the time of can influencing people's study and work, have infringement, and range determination is limited in scope.
Adopt the mode of distance between the sensor measurement object; the general emitter that adopts is initiatively launched such as infrared ray or ultrasound wave etc.; and adopt receiving trap to receive infrared ray that object reflects or ultrasound wave etc.; measure distance between the object by the mode of measuring emission infrared ray or ultrasound wave and receiving infrared-ray or hyperacoustic time interval or phase differential; but; adopt the mode of distance between the sensor measurement object; have very big interference; no matter be that the people is before sensor; or book; chair; various objects such as toy are before sensor; sensor all can be thought the people; and mensuration distance; when distance is sent prompting during less than permissible value; prompting makes the mistake; in addition, for the situation of people before sensor, when the people does not see display; vision protection device also can send prompting; such as, for a vision protection device of measuring people's range display distance, when a people walks about before computer; distance measuring equipment is measured the distance of people's range display; thereby send wrong prompting message, and in fact, at this moment; the people does not see display; how of a specified duration no matter how near its range display is,, should not send prompting message.
In sum, the sight protectio weak effect of the vision protection device of prior art, the prompting message that sends is inaccurate.
Summary of the invention
The invention provides a kind of method and device of realizing sight protectio, in order to solve the sight protectio weak effect of the vision protection device that exists in the prior art, the inaccurate problem of the prompting message that sends.
A kind of method that realizes sight protectio provided by the invention is used for sending and the prompting message of watching object maintenance certain distance to the user, and this method may further comprise the steps:
A. comprise the image of described user's eyes by the image capture device collection, and calculate the pixel distance between the eyes on the described image;
B. when described pixel distance during, send prompting message to described user more than or equal to predefined pixel distance threshold value.
Described pixel distance is for carrying out the pixel distance after the normalization according to resolution.
When described pixel distance during more than or equal to described pixel distance threshold value, step B further comprises step: calculate the duration of described pixel distance more than or equal to described pixel distance threshold value;
Then, send described prompting message to described user further when described duration during more than or equal to predefined time gate limit value.
The described step that preestablishes the pixel distance threshold value comprises:
When there are certain distance in some users' eyes and described image capture device, gather described some users' binocular images respectively by described image capture device, and calculate pixel distance between the eyes on described some users' the binocular images respectively, obtain some pixel distances;
With the mean value of described some pixel distances as described pixel distance threshold value.
The described step that preestablishes the pixel distance threshold value comprises:
When there are certain distance in described user's eyes and described image capture device, gather described user's binocular images by described image capture device, and calculate pixel distance between the eyes on the described image, with this pixel distance as described pixel distance threshold value.
A kind of device of realizing sight protectio provided by the invention is used for sending and the prompting message of watching object maintenance certain distance to the user, and this device comprises:
Information acquisition unit is used to gather the image that comprises described user's eyes, and calculates the pixel distance between the eyes on the described image;
Reminding unit, be used for when described pixel distance more than or equal in advance the storage the pixel distance threshold value time, send prompting message to described user.
Described information acquisition unit comprises:
Collecting unit is used to gather the image that comprises described user's eyes;
Message unit is used to calculate the pixel distance between the eyes on the described image, and this pixel distance is for carrying out the pixel distance after the normalization according to resolution.
Described reminding unit comprises:
First judging unit is used for trigger sending the prompting message unit when described pixel distance during more than or equal to the pixel distance threshold value of storage in advance;
Send the prompting message unit, when being used to receive the trigger pip of described first judging unit transmission, send prompting message to described user.
Described reminding unit also comprises:
Second judging unit, be used for when described pixel distance during more than or equal to described pixel distance threshold value, calculate the duration of described pixel distance more than or equal to described pixel distance threshold value, when described duration during, trigger described transmission prompting message unit more than or equal to predefined time gate limit value;
Then, described transmission prompting message unit when being used to receive the trigger pip of described first judging unit and the transmission of described second judging unit, sends prompting message to described user.
This device also comprises:
First is provided with the unit, be used for providing at least a prompting message to the user, and the prompting message that described user is set sends to described reminding unit;
Then described reminding unit when described pixel distance during more than or equal to the pixel distance threshold value of storage in advance, sends the prompting message that described user sets to described user.
This device also comprises:
Second is provided with the unit, is used to preserve the time gate limit value that described user sets in advance, and this time gate limit value is sent to described reminding unit.
A kind of display provided by the invention sends the prompting message that keeps certain distance with self to the user, and this display comprises:
Vision protection device is used to gather the image that comprises described user's eyes, and calculates the pixel distance between the eyes on the described image, when described pixel distance during more than or equal to the pixel distance threshold value of storage in advance, sends prompting message to described user.
Described vision protection device comprises:
Information acquisition unit is used to gather the image that comprises described user's eyes, and calculates the pixel distance between the eyes on the described image, and this pixel distance is for carrying out the pixel distance after the normalization according to resolution;
Reminding unit, be used for when described pixel distance more than or equal in advance the storage the pixel distance threshold value time, send prompting message to described user.
The present invention is used for sending and the prompting message of watching object maintenance certain distance to the user; the image that comprises described user's eyes by the image capture device collection; and calculate pixel distance between the eyes on the described image; when described pixel distance during more than or equal to predefined pixel distance threshold value; send prompting message to described user; by this technical scheme; realized when the user watches display or books etc. to watch object; remind user and the described object of watching to keep certain distance; thereby reach the purpose of sight protectio; and the prompting message that adopts this sight protectio mode to send is more accurate, meets customer requirements more.
Description of drawings
Fig. 1 is a prior art convex lens image-forming principle synoptic diagram;
Fig. 2 is the structural representation of apparatus of the present invention embodiment;
Fig. 3 is the schematic flow sheet of eye feature independent positioning method among apparatus of the present invention embodiment;
Fig. 4 is the structural representation of display embodiment of the present invention;
Fig. 5 is the schematic flow sheet of the inventive method embodiment;
Fig. 6 is the schematic flow sheet of the inventive method embodiment.
Embodiment
The embodiment of the invention provides a kind of method and device of realizing sight protectio, be used to remind the user to keep certain distance with watching object, protect described user's eyesight, comprise the image of described user's eyes by the image capture device collection, and calculate the pixel distance between the eyes on the described image; When described pixel distance during more than or equal to predefined pixel distance threshold value; send prompting message to described user; by this technical scheme; realized when the user watches display or books etc. to watch object; remind user and the described object of watching to keep certain distance; thereby reach the purpose of sight protectio, and the prompting message that adopts this sight protectio mode to send is more accurate, meets customer requirements more.
Referring to Fig. 1, be imaged as example with camera, when camera normally used, object distance was during greater than two times of focal length 2f, become inverted real image, according to the convex lens image-forming principle, in the time of outside object distance is in 2f, represent the size of thing respectively with H, h represents the size of picture, A represents object distance, and a represents image distance, and then the geometric relationship according to light has:
So have
Promptly as big or small h and object distance A are inversely proportional to, it is constant then to work as focal distance f, image distance a is constant, when the big or small H of thing is approximate constant, just can judge the object distance size by the size of picture, and digital camera, the image-forming principle of other image capture devices such as Digital Video is similar with camera, also has identical conclusion.
For certain fixing image capture device (comprising camera, digital camera and video camera etc.), according to image-forming principle, when its camera lens and fixed focal length, become the size of image just to depend on the size of object distance and object, and when sensor devices area fixedly the time, the size of image just is presented as the elemental area that this image is shared, is presented as this image on number of pixels two between as last distance at 2.
Eyes are one of position the most fixing relative organs on the person, if preestablish the camera lens and the focal length of image capture device, and the size of sensor devices, when image capture device is faced in the people front, if ignore the difference of distance between the different people eyes, can think become the distance between two in the image only to be subjected to the influence of the object distance of human eye, so, just can judge the object distance size of people by the pixel distance between people's eyes in the images acquired, thereby can judge whether human eye meets customer requirements to the distance of image capture device apart from camera lens.
Therefore; if can measure as the number of pixels between the binocular images on the plane; it is pixel distance; just can judge that eye distance image capture device distance is whether within institute's claimed range by the method for judging pixel distance size between the eyes picture; equal to watch the distance of object and described user's eyes when the distance of described image capture device and user's eyes; and described image capture device and described when watching object over against described user's eyes just can reach the purpose of the described user's eyesight of protection by device provided by the invention.
Below in conjunction with accompanying drawing, illustrate respectively how apparatus of the present invention embodiment and method embodiment realize.
Referring to Fig. 2, apparatus of the present invention embodiment is used for sending and the prompting message of watching object maintenance certain distance to the user, thereby protect described user's eyesight, this device comprises: information acquisition unit 21, reminding unit 22, first are provided with unit 23 and second unit 24 are set;
Described information acquisition unit 21 comprises: collecting unit 211 and message unit 212;
Described reminding unit 22 comprises: first judging unit 221, second judging unit 222 and transmission prompting message unit 223;
Described information acquisition unit 21 is used to gather the image that comprises described user's eyes, and calculates the pixel distance between the eyes on the described image;
Wherein, described collecting unit 211 is used to gather the image that comprises described user's eyes;
Described message unit 212 is used to calculate the pixel distance between the eyes on the described image, and this pixel distance is for carrying out the pixel distance after the normalization according to resolution;
Wherein, distance between described user's eyes and the described collecting unit 211 equals described user's eyes and watches distance between objects; be that described object and the described device watched is simultaneously just facing to user's eyes; and equate with the distance of user's eyes, thereby can play the effect of protection user eyesight.
By left and right sides eyes location positioning in the message unit 212 automatic process decision chart pictures behind the eye position of the left and right sides, the mode that just can adopt plane of delineation coordinate point-to-point transmission to ask for distance obtains left and right sides eyes at the pixel distance between the imaging point on the picture plane, and the pixel distance between promptly described user's binocular images is the distance between two point coordinate on the image;
For example, after described collecting unit 211 had collected the image that comprises people's face, message unit 212 was located eye feature point position by the following method, and referring to Fig. 3, this method specifically comprises the steps:
S301, detect to obtain people face position and size information, and adopt statistical to determine left eye region of search and right eye region of search by people's face;
Determine that promptly left eye and right eye position range may occur in image, the position that each is possible is called the primary election position;
S302, in described left eye and right eye region of search, adopt left eye local feature detecting device and right eye local feature detecting device respectively, all left eye primary election positions and right eye primary election position are differentiated, and determined a simple eye similarity numerical value for each primary election position;
Similarity is big more, makes that the possibility of true eye position is big more;
S303, from all left eye primary election positions and right eye primary election position, the top n position of selecting similarity numerical value maximum respectively is as left-eye candidate positions and right eye position candidate, and it is right that all left eyes and right eye position candidate are made into the eyes candidate, with each candidate to being that benchmark is determined the eyes zone;
S304, adopt the eyes area detector, described each eyes zone differentiated as global restriction, for each eyes candidate wherein to determining an eyes similarity numerical value;
Preceding M eyes candidate of S305, selection eyes similarity numerical value maximum is right, to all left-eye candidate positions and all right eye position candidate difference calculating mean value wherein;
With the mean value of all left-eye candidate positions as the left eye characteristic point position;
With the mean value of all right eye position candidate as the right eye characteristic point position.
The described collecting unit 211 of the embodiment of the invention is the digitized image collecting device, and the image that is collected is represented with two-dimensional matrix.Each point on the image, all have a digitized coordinate (x, y).For example, for the image of one 640 * 480 resolution, the coordinate of certain point (x, satisfy position y):
{(x，y)|x＞＝0&&x＜640，y＞＝0&&y＜480}；
Then, just can calculate the pixel distance between the left eye and right eye on the image by the distance between described left eye characteristic point position coordinate and the described right eye characteristic point position coordinate.
Carry out in the digitized process at the analog image that sensor devices is obtained, the area of supposing sensor devices is B*C, resolution is W*D, B/W=C/D is then arranged, the number of pixels of the digital picture of the unit sizes of described analog image correspondence is B/W, if the number of pixels on the digital picture between 2 (pixel distance) is m, then the above 2 distance of the analog image that is become are h=m*B/W, as seen the distance between two points on the analog image (true picture) is directly proportional with described 2 pixel distances on digital picture, thereby can adopt pixel distance to judge on the analog image that distance between two points is whether in limited range, when described pixel distance less than in advance the storage the pixel distance threshold value time, illustrate that distance between two points that is to say that actual object distance is safe on the analog image in limited range.
For same image capture device (as camera), can be by the resolution of its output image of software setting, such as setting resolution is 640 * 480, also can set resolution is 320 * 240, keep in the same image that distance collected for same individual and same image capture device, though the image size that is collected is identical, but because resolution difference, variation has taken place in the distance h between the eyes on the image and the relation of the pixel distance between the eyes on the image, adopts pixel distance to judge whether distance between two points just needs to set corresponding pixel distance threshold value respectively for different resolution on the analog image in limited range.
Therefore, preferably, the embodiment of the invention is for fear of the influence of resolution, and described pixel distance is for carrying out the pixel distance after the normalization according to resolution, and described pixel distance threshold value is also for carrying out the pixel distance threshold value after the normalization according to resolution;
212 pairs of pixel distances that calculate of message unit carry out normalized according to resolution, pixel distance after the described normalization is the ratio of the resolution on the pixel distance between 2 and the present level direction on the digital picture that collects, perhaps be the ratio of the resolution on the pixel distance between 2 on the digital picture that collects and the current vertical direction, for example, when the size A of sensor devices was constant, h was directly proportional with m/W.For resolution is 640 * 480 situation, and the resolution on the horizontal direction is 640, and the situation for 320 * 240, horizontal direction resolution are 320;
Like this, adopted the pixel distance after the normalization to judge on the analog image that distance between two points is whether in limited range, make the situation to adopt the pixel distance threshold process different resolution after the same normalization, avoided to set the loaded down with trivial details of corresponding pixel distance threshold value respectively for different resolution.
Described reminding unit 22, be used for when described pixel distance more than or equal in advance the storage the pixel distance threshold value time, and, when described pixel distance during more than or equal to predefined time gate limit value, sends prompting message to described user more than or equal to duration of described pixel distance threshold value;
Wherein, the described pixel distance threshold value of storage in advance can set in advance in the following manner:
Mode one: set a distance value, this value for people's eye distance from the safe distance value of watching object, promptly human eye is thought when watching object more than or equal to this distance value safely with described, can not cause eyesight to injure;
Camera is fixed on watches on the object, and adjust angle and make it just to photograph the face of watching user before the object; Measure and statistics all kinds people positive in the face of image capture device and with described distance of watching object be described setting apart from the time, the pixel distance between the eyes on the image that described image capture device collects;
The average of the pixel distance of the eyes on the image of different people correspondence as described pixel distance threshold value, is stored in this threshold value in the reminding unit 22 in advance.
Mode two: consider the difference of the eyes distance between the various people, the difference between especially difference between the men and women, and adult and the children, the threshold value of storage in advance is divided three classes: the adult man, adult woman, child, certain sorting technique that other also can be arranged as required;
In actual applications, the device of described realization sight protectio can provide type selecting for the user, the user can be according to above-mentioned classification, select grow up the pixel distance threshold value of male option correspondence, the pixel distance threshold value of the women option correspondence of growing up or the pixel distance threshold value of child's option correspondence, thereby make that the prompting message that receives is more accurate;
Mode three: in actual applications, according to user's needs, select certain distance by the user, when this user's eyes when watching object to have described certain distance, gather described user's binocular images by watching image capture device fixing on the object, and calculate pixel distance between the eyes on the described image, with this pixel distance as described pixel distance threshold value;
So, this user just can receive the prompting message that described reminding unit 22 sends according to the pixel distance threshold value of oneself setting in actual applications, and is so just more accurate.
Described first is provided with unit 23, be used for providing at least a prompting message to the user, and the prompting message that described user is set sends to described reminding unit 22;
Then, the prompting message that described reminding unit 22 sends to described user is the prompting message that described user sets, and sends described prompting message and can adopt the mode of the combination of any form such as output signal, sound, picture cues and any several forms to send prompting message;
Described second is provided with unit 24, is used to preserve the time gate limit value (for example 1 second) that described user sets in advance, and this time gate limit value is sent to described reminding unit 22;
Wherein, described first judging unit 221, be used for when described pixel distance more than or equal in advance the storage the pixel distance threshold value time, trigger described transmission prompting message unit 223;
Described second judging unit 222 is used to calculate the duration of described pixel distance more than or equal to described pixel distance threshold value, when described duration during more than or equal to predefined time gate limit value, triggers described transmission prompting message unit 223;
Then, described transmission prompting message unit 223 when being used to receive the trigger pip of described first judging unit 221 and 222 transmissions of described second judging unit, sends the prompting message that described user sets to described user.
For example, when described when watching object to be display, suppose the vision protection device that needs a kind of distance when eyes of user and display of design can send prompting message during greater than 1 second less than 50cm and duration from this user of trend;
In order to save cost, described collecting unit 211, promptly image capture device can adopt cheaper camera, and camera is fixed on the upper end of display, and adjusts the face that angle makes it just to photograph user before the display;
Collecting unit 211 is gathered when the user front and is watched display, and eyes of user and the facial image of display distance when 50cm, and by the pixel distance between the eyes in message unit 212 these images of calculating, and with this pixel distance as pixel distance threshold value d
T
During practical application, collecting unit 211 images acquired, the eyes in message unit 212 positioning images, if having eyes in the image then calculate pixel distance between eyes, first judging unit 221 judges that whether pixel distance is more than or equal to threshold value d between eyes
T, pixel distance is more than or equal to the pixel distance threshold value d that stores in advance when between described eyes
TThe time, pixel distance is more than or equal to threshold value d between second judging unit, 222 calculating eyes
TDuration t, if t is more than or equal to predefined time gate limit value t
TWhen (can be 1 second), then send prompting message unit 223 and send prompting message, remind the user away from display to described user.
Simultaneously, the embodiment of the invention also provides a kind of display, and this display has the function of protection user eyesight, and referring to Fig. 4, this display comprises: vision protection device 41;
Described vision protection device comprises: information acquisition unit 411 and reminding unit 412;
Described vision protection device 41; be used to gather the image that comprises described user's eyes; and calculate pixel distance between the eyes on the described image, when described pixel distance during, send prompting message to described user more than or equal to the pixel distance threshold value of storage in advance.
Wherein, described information acquisition unit 411 is used to gather the image that comprises described user's eyes, and calculates the pixel distance between the eyes on the described image;
Described reminding unit 412, be used for when described pixel distance more than or equal in advance the storage the pixel distance threshold value time, send prompting message to described user;
Preferably, described pixel distance is for carrying out the pixel distance after the normalization according to resolution; Described pixel distance threshold value is for carrying out the pixel distance threshold value after the normalization according to resolution.
Referring to Fig. 5, the inventive method embodiment is used for sending and the prompting message of watching object maintenance certain distance to the user, and the method comprising the steps of:
S501, comprise the image of described user's eyes, and calculate the pixel distance between the eyes on the described image by the image capture device collection;
S502, when described pixel distance during more than or equal to predefined pixel distance threshold value, send prompting message to described user;
Wherein, can preestablish the pixel distance threshold value by following two kinds of methods:
Method one: when there are certain distance in some users' eyes and described image capture device, gather described some users' binocular images respectively by described image capture device, and calculate pixel distance between the eyes on described some images respectively, obtain described some pixel distances; With the mean value of described some pixel distances as described pixel distance threshold value.
Method two: when there are certain distance in described user's eyes and described image capture device, gather described user's binocular images by described image capture device, and calculate pixel distance between the eyes on the described image, with this pixel distance as described pixel distance threshold value.
Referring to Fig. 6, the inventive method embodiment is used for sending and the prompting message of watching object maintenance certain distance to the user, and the method comprising the steps of:
S601, collection comprise the image of described user's eyes;
Pixel distance between the eyes on S602, the described image of calculating;
Described pixel distance is for carrying out the pixel distance after the normalization according to resolution;
S603, when described pixel distance during more than or equal to predefined pixel distance threshold value, calculate the duration of described pixel distance more than or equal to described pixel distance threshold value, when described duration during, send prompting message to described user more than or equal to predefined time gate limit value;
Described pixel distance threshold value is for carrying out the pixel distance threshold value after the normalization according to resolution.
In sum, by technical scheme provided by the invention, employing eyes image-forming range is judged human eye and the actual object distance of watching object, reminds user and display to maintain a certain distance, thereby realizes that the protection user can be because of crossing the injury that closely causes eyesight with watching object distance; The error prompting that the present invention has simultaneously avoided prior art to cause owing to interference such as books, hand, healths, the present invention has stronger antijamming capability; Simultaneously, the user can regulate the pixel distance threshold value and the time of reminding institute's foundation easily, therefore, has brought facility for user's application, meet user's request more, and extensibility is strong.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (13)
1. a method that realizes sight protectio is characterized in that, is used for sending and the prompting message of watching object maintenance certain distance to the user, and this method may further comprise the steps:
A. comprise the image of described user's eyes by the image capture device collection, and calculate the pixel distance between the eyes on the described image;
B. when described pixel distance during, send prompting message to described user more than or equal to predefined pixel distance threshold value.
2. the method for claim 1 is characterized in that, described pixel distance is for carrying out the pixel distance after the normalization according to resolution.
3. the method for claim 1 is characterized in that, when described pixel distance during more than or equal to described pixel distance threshold value, step B further comprises step: calculate the duration of described pixel distance more than or equal to described pixel distance threshold value;
Then, send described prompting message to described user further when described duration during more than or equal to predefined time gate limit value.
4. the method for claim 1 is characterized in that, the described step that preestablishes the pixel distance threshold value comprises:
When there are certain distance in some users' eyes and described image capture device, gather described some users' binocular images respectively by described image capture device, and calculate pixel distance between the eyes on described some users' the binocular images respectively, obtain some pixel distances;
With the mean value of described some pixel distances as described pixel distance threshold value.
5. the method for claim 1 is characterized in that, the described step that preestablishes the pixel distance threshold value comprises:
When there are certain distance in described user's eyes and described image capture device, gather described user's binocular images by described image capture device, and calculate pixel distance between the eyes on the described image, with this pixel distance as described pixel distance threshold value.
6. a device of realizing sight protectio is characterized in that, this device is used for sending and the prompting message of watching object maintenance certain distance to the user, and this device comprises:
Information acquisition unit is used to gather the image that comprises described user's eyes, and calculates the pixel distance between the eyes on the described image;
Reminding unit, be used for when described pixel distance more than or equal in advance the storage the pixel distance threshold value time, send prompting message to described user.
7. device as claimed in claim 6 is characterized in that, described information acquisition unit comprises:
Collecting unit is used to gather the image that comprises described user's eyes;
Message unit is used to calculate the pixel distance between the eyes on the described image, and this pixel distance is for carrying out the pixel distance after the normalization according to resolution.
8. device as claimed in claim 6 is characterized in that, described reminding unit comprises:
First judging unit is used for trigger sending the prompting message unit when described pixel distance during more than or equal to the pixel distance threshold value of storage in advance;
Send the prompting message unit, when being used to receive the trigger pip of described first judging unit transmission, send prompting message to described user.
9. device as claimed in claim 8 is characterized in that, described reminding unit also comprises:
Second judging unit, be used for when described pixel distance during more than or equal to described pixel distance threshold value, calculate the duration of described pixel distance more than or equal to described pixel distance threshold value, when described duration during, trigger described transmission prompting message unit more than or equal to predefined time gate limit value;
Then, described transmission prompting message unit when being used to receive the trigger pip of described first judging unit and the transmission of described second judging unit, sends prompting message to described user.
10. device as claimed in claim 6 is characterized in that, this device also comprises:
First is provided with the unit, be used for providing at least a prompting message to the user, and the prompting message that described user is set sends to described reminding unit;
Then described reminding unit when described pixel distance during more than or equal to the pixel distance threshold value of storage in advance, sends the prompting message that described user sets to described user.
11. device as claimed in claim 9 is characterized in that, this device also comprises:
Second is provided with the unit, is used to preserve the time gate limit value that described user sets in advance, and this time gate limit value is sent to described reminding unit.
12. a display is characterized in that, this display sends the prompting message that keeps certain distance with self to the user, and this display comprises:
Vision protection device is used to gather the image that comprises described user's eyes, and calculates the pixel distance between the eyes on the described image, when described pixel distance during more than or equal to the pixel distance threshold value of storage in advance, sends prompting message to described user.
13. display as claimed in claim 12 is characterized in that, described vision protection device comprises:
Information acquisition unit is used to gather the image that comprises described user's eyes, and calculates the pixel distance between the eyes on the described image, and this pixel distance is for carrying out the pixel distance after the normalization according to resolution;
Reminding unit, be used for when described pixel distance more than or equal in advance the storage the pixel distance threshold value time, send prompting message to described user.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100984956A CN101033955B (en) | 2007-04-18 | 2007-04-18 | Method, device and display for implementing eyesight protection |
Applications Claiming Priority (1)
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| CN101409784A (en) | 2007-10-10 | 2009-04-15 | 联想(北京)有限公司 | Camera device and information-prompting apparatus |
| CN101178769B (en) * | 2007-12-10 | 2013-03-27 | 北京中星微电子有限公司 | Health protecting equipment and realization method thereof |
| CN101470460B (en) * | 2007-12-29 | 2011-07-27 | 联想(北京)有限公司 | Method for sight protection when using computer, and computer thereof |
| KR101541561B1 (en) * | 2008-09-29 | 2015-08-03 | 파나소닉 인텔렉츄얼 프로퍼티 코포레이션 오브 아메리카 | User interface device, user interface method, and recording medium |
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| CN114353744A (en) * | 2021-03-18 | 2022-04-15 | 武汉星辰北斗科技有限公司 | GPS elevation fitting method and system based on SRTM1 and EGM2008 |
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