CN101620359A - Judging method of eye sight line - Google Patents
Judging method of eye sight line Download PDFInfo
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- CN101620359A CN101620359A CN200810128246A CN200810128246A CN101620359A CN 101620359 A CN101620359 A CN 101620359A CN 200810128246 A CN200810128246 A CN 200810128246A CN 200810128246 A CN200810128246 A CN 200810128246A CN 101620359 A CN101620359 A CN 101620359A
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Abstract
The invention discloses a judging method of the eye sight line, which is applied to a camera head. The camera head is provided with a camera unit which is used for capturing images. The judging method of the eye sight line is realized by analyzing the eye characteristic of a face of a person in the image and judges whether the eye sight line looks directly forwards or not according to eye characteristics. The invention is used for improving the defects of the prior art, namely shot photos are not beautiful if a photographer can not directly use a visual method, or scene, when the sight line of the photographer does not pay attention to the camera lens in the front, is found on the LCD screen of the camera and is notified.
Description
Technical field
The present invention relates to the method that a kind of eye sight line is judged, whether particularly a kind of eye sight line watches the determination methods in the place ahead attentively.
Background technology
Digital camera is more and more universal at present, and almost staff is one.And each big digital camera manufacturer releases the camera of different shaping and functional requirement respectively, and the consumer can be gone to choose according to individual's demand.
Present digital camera, the basic function that has is very similar, from aperture size, optical zoom, Digital Zoom, start speed, memory card capacity support degree, and anti-hand function such as shake.The positive invariably new function of exploitation of each tame manufacturer satisfies the demands of consumers, and the most frequently used photograph mode of ordinary consumer, nothing more than being portrait.Therefore, having manufacturer to release the camera with human face recognition function, is automatically human face recognitions all in the screen to be come out, and obtains best shooting focal length, and arrange in pairs or groups only aperture and shutter make photographer can easily photograph clear photograph again.
Yet when taking personage's photograph, the quality that the person's of being taken expression in the eyes comparison film is taken is occupied very big proportion.Therefore, photographer needs every person's of being taken of extra care eyes whether watching the camera lens in the place ahead attentively, and so taking the photo that comes out just can have aesthetic feeling.When the person's of being taken negligible amounts, the LCD screen that photographer can be by camera or directly note the person's of being taken sight line in visual mode.If the person's of being taken sight line is not when watching the camera lens in the place ahead attentively, photographer informs the person of being taken with oral propagandaing directed to communicate again.If but when clapping group photograph, photographer just can't take into account every the person's of being taken sight line, do not watch the camera lens in the place ahead attentively as if the sight line that a few peoples are arranged, promptly can ruin esthetic sensibility.On the other hand, if the LCD screen of camera is less, photographer also is not easy to find that from the LCD screen of camera whether a minority's sight line is arranged is to watch other place attentively.
Summary of the invention
In view of the problem of above-mentioned known technology, the invention provides the method that a kind of eye sight line is judged.In the improvement known technology,, and informed the more inaesthetic problem of photo that will cause shooting to come out if photographer can't be directly do not noted the camera lens in the place ahead with visual method or from the sight line that the LCD screen of camera is found out the person of being taken.
The method that eye sight line disclosed according to the present invention is judged, when being applied to camera head shooting portrait, whether the eye sight line that detects portrait automatically watches the camera head in the place ahead attentively.Camera head comprises image unit.
At first, obtain the portrait image that desire is taken by image unit.Then, in the portrait image, the mode of utilizing profile to compare analyzes the person's of being taken eye areas.By the information of eye areas, obtain comprising the eye feature of pupil and eye socket again.Comparison through eye feature can obtain the feature ratio relevant for eye feature.Promptly can judge the direction that eye sight line is watched attentively according to the feature ratio.
Wherein, in order to judge that the direction that eye sight line is watched attentively is the feature ratio of utilizing in the eye feature.The computing method of feature ratio comprise the following steps: to capture the eye feature that comprises pupil and eye socket in each face area from picture.Analyze in the same face area, the relative distance between pupil and the eye socket according to the resulting difference value of pupil radius particular percentile, calculates the feature ratio more again.
And the analysis of the relative distance between pupil and the eye socket comprises the following steps: to analyze respectively the position of pupil center's point and eye socket central point, calculates the distance between the position of the position of pupil center's point and eye socket central point again.The distance that calculates is promptly represented the relative distance between pupil and the eye socket.
Judge value that judgement that pupil is positioned at the position of eye socket comprises the following steps: that relative distance and difference value subtract each other less than zero according to the feature ratio, the feature ratio is negative.The value that relative distance and difference value are subtracted each other is greater than zero, and the feature ratio is positive number.If the feature ratio is a negative, judge that then on behalf of eye sight line, pupil is the center that is positioned at eye socket, promptly watching the place ahead attentively.If it is not the center that is positioned at eye socket that relative distance, is then judged pupil greater than difference value, promptly representing eyes is not to watch the place ahead attentively.
After the judgement of feature ratio, when pupil was positioned at the center of eye socket, camera head can produce cue.After making photographer realize cue, after the understanding person's of being taken eye sight line is all being watched camera head attentively, can take pictures.Otherwise after judging, pupil is not that camera head also can produce alarm signal when being positioned at the center of eye socket.After making photographer realize alarm signal, the eye sight line of understanding the person of being taken is not all to watch camera head attentively.Photographer can inform that promptly the person of being taken please watch camera head attentively, treat that camera head produces cue after, promptly can take pictures.
The method that eye sight line disclosed in this invention is judged is after capturing the person's of being taken face area by picture, to analyze the eye feature in the face area, utilizes eye feature to converse the feature ratio again, promptly can judge the direction that eye sight line is watched attentively.And camera head sends cue or alarm signal according to judged result.Therefore, the sight line that photographer need not the one by one visual person of being taken, or find out from the LCD screen of camera and to watch the not square person of being taken attentively, can directly shoot the photo that the person of being taken is all watching camera head attentively easily.
More than about the explanation of the explanation of content of the present invention and following embodiment be in order to demonstration with explain spirit of the present invention and principle, and provide claim of the present invention further to explain.
Description of drawings
Fig. 1 is according to process flow diagram of the present invention;
Fig. 2 is by the resulting image synoptic diagram of camera head according to of the present invention;
Fig. 3 A is according to eye areas synoptic diagram of the present invention;
Fig. 3 B is according to aspect ratio illustration intention of the present invention;
Fig. 4 A is according to color mark frame synoptic diagram of the present invention;
Fig. 4 B is according to black-and-white image synoptic diagram of the present invention; And
Fig. 4 C is according to letter signal synoptic diagram of the present invention.
And the description of reference numerals in the above-mentioned accompanying drawing is as follows:
20 images
200 persons of being taken
30 eye areas
31 eye sockets
311 eye socket central points
32 pupils
321 pupil center point
41 color mark frames
42 black-and-white images
43 letter signals
D relative distance
The R radius
The X difference value
S10 obtains image by image unit
S11 utilizes the mode of profile comparison to analyze eye areas from image
S12 analyzes the eye feature in the eye areas
S13 calculates the relative distance of pupil and eye socket and calculates difference value according to the pupil radius from eye feature
S14 calculates the feature ratio according to the value of relative distance and difference value
S15 judges that according to the feature ratio pupil is positioned at the position of eye socket
Whether S16 watches the place ahead according to the position of pupil place eye socket attentively to judge sight line, if the place ahead is watched in judgement attentively, produces cue, if judge it is not to watch the place ahead attentively, produces alarm signal.
Embodiment
Below in embodiment, be described in detail detailed features of the present invention and advantage, its content is enough to make any ability those of ordinary skill to understand technology contents of the present invention and enforcement according to this, and according to the disclosed content of this instructions, claim and accompanying drawing, any ability those of ordinary skill can be understood purpose and the advantage that the present invention is correlated with easily.Following embodiment further describes viewpoint of the present invention, but non-to limit category of the present invention anyways.
The method that eye sight line disclosed according to the present invention is judged is to can be applicable to camera head.This camera head can be digital camera (Digital Camera), mobile phone (Mobile Phone), personal digital assistant (Personal Digital Assistant, PDA), the imaging apparatus on Smart Phone (PDA phone, Smart phone), pocket computer (Pocket PC) or the palmtop computer electronic data processing equipments such as (Hand-held PC).Acquisition and the storage of this camera head in order to carry out image.
See also Fig. 1, it is to be the process flow diagram of eye sight line determination methods according to an embodiment of the invention.As shown in Figure 1, eye sight line determination methods according to the present invention is the picture that image unit captured by camera head, carries out image analysing computer and judges, to obtain the direction determining that sight line is watched attentively.
At first, obtain image, as step 10 by image unit.Image unit is a camera lens, is made up of one or polylith optical glass usually, is used for receiving the light that desire is taken thing.The received light of image unit is converted into image by camera head again and is shown on the LCD screen of camera head.Next, utilize the mode of profile comparison from image, to analyze eye areas, as step 11.In resultant image, normally comprise picture miscellaneous.Therefore, need utilize the mode of profile comparison, find out human face region from picture image, again by comparing out eye areas in the human face region, the sight line after being beneficial to is judged.Analyze the eye feature in the eye areas, as step 12.After comparing out eye areas, the picture by eye areas analyzes eye feature more again.Eye feature comprises pupil and eye socket.
Then, calculate the relative distance of pupil and eye socket and calculate difference value from eye feature, as step 13 according to the pupil radius.For instance, can analyze the position of the central point and the eye socket central point of pupil respectively.The central point of eye socket is to utilize the distance of two jiaos in eye socket to decide its center position.The central point of pupil then can obtain by analyzing the pupil profile by after detecting the pupil profile.Obtain to calculate the relative distance between pupil center's point and the eye socket central point after the position of pupil center's point and eye socket central point.After utilizing the pupil profile to calculate the radius of pupil again, can calculate difference value according to the particular percentile of pupil radius.
Afterwards, according to the value of relative distance and difference value, calculate the feature ratio, as step 14.If the value that relative distance and difference value are subtracted each other is less than zero, the feature ratio is negative.If the value that relative distance and difference value are subtracted each other is greater than zero, the feature ratio is positive number.Judge that according to the feature ratio pupil is positioned at the position of eye socket, as step 15.If the feature ratio is a negative, judge that pupil is positioned at the middle position of eye socket.If the feature ratio is a positive number, judge that pupil is not positioned at the middle position of eye socket, promptly outside middle position.
At last,, whether watch the place ahead attentively,, produce cue,, produce alarm signal, as step 16 if judge it is not to watch the place ahead attentively if the place ahead is watched in judgement attentively to judge sight line according to the position of pupil place eye socket.If through the judgement of feature ratio, the pupil position is positioned at the middle position of eye socket, judge that promptly sight line watching the camera head in the place ahead attentively.Produce cue immediately, cue is letter signal or voice signal.If through the judgement of feature ratio, the pupil position is not the middle position that is positioned at eye socket, judges that promptly sight line do not watching the place ahead attentively, but watch attentively towards other directions.Produce alarm signal immediately on image, alarm signal is voice signal or picture signal.
Be embodiments of the invention below, see also Fig. 2.When utilizing camera head to take group photograph, obtain image 20, comprise the number person of being taken 200 in the image 20 by image unit.Then from the person of being taken 200, after the mode that adopts profile to compare analyzes people's face of the person of being taken 200, compare out eye areas 30 (as shown in Figure 3A) by people's face again.Then, from eye areas 30, utilize the mode of profile comparison to compare out eye socket 31 and pupil 32 equally.
See also Fig. 3 B, from eye areas 30, compare out eye socket 31 and pupil 32 after, calculate the position of eye socket central point 311 and pupil center's point 321.Can obtain both relative distance D from the position of eye socket central point 311 and pupil center's point 321, then calculate the radius R of pupil 32.
According to radius R, can come calculated difference value X according to the particular percentile of radius R.Particular percentile at present embodiment adopts 30%, also can be other particular percentile.The 30%th, set according to resulting preferred proportion after the database processing, photographer also can change its particular percentile according to own receptible degree.Relative distance D and difference value X are compared, can obtain the feature ratio.If the value that relative distance D and difference value X subtract each other is less than zero, promptly representing the feature ratio is negative.If the value that relative distance D and difference value X subtract each other is greater than zero, promptly representing the feature ratio is positive number.
And be positive number or negative according to the value of feature ratio, can judge that pupil 32 is positioned at the position of eye socket 31.When the value of feature ratio is a negative, then pupil 32 is positioned at the middle position of eye socket 31, and promptly the decidable eye sight line is being watched the place ahead attentively.Simultaneously, producing cue makes photographer know this situation.When the value of feature ratio is a positive number, then pupil 32 is not the middle position that is positioned at eye socket 31, and promptly the decidable eye sight line is not to watch the place ahead attentively.Simultaneously, produce alarm signal, photographer is noted abnormalities and inform the direction of the person's of being taken sight line immediately.
Seeing also Fig. 4 A, Fig. 4 B, Fig. 4 C, is after judging direction of visual lines, the cue of generation or the synoptic diagram of alarm signal.Cue can be voice signal or letter signal, and alarm signal can be voice signal, letter signal, and picture signal.When the signal that produces is voice signal, be to produce sound (for example, the sound of cue is continuous three short sound, and the sound of alarm signal is a long sound) (not shown) by camera head.When the signal that produces was picture signal, picture signal can be color mark frame 41 (as Fig. 4 A) or black-and-white image 42 (as " 4B figure ").Color mark frame 41 comes across in the image 20, eye sight line do not watch attentively camera head the person of being taken 200 eye areas 30 (not shown) on every side, who person of being taken 200 does not watch camera head attentively in photographer's image 20 to remind.Black-and-white image 42 is the colors of eye areas 30 (not shown) of eye sight line not being watched attentively the person of being taken 200 of camera head, transfers black and white screen to by colour originally, finds clearly that to make things convenient for photographer the person of being taken 200 sight line is unusual.When the signal that produces is letter signal 43 (as Fig. 4 C), promptly can produce text strings in image 20 lower right corner and (for example inform photographer's situation, the letter signal 43 that cue occurs is " can take ", and the letter signal 43 that alarm signal occurs is " having the people not watch camera lens attentively ").
The producing method of above-described cue and alarm signal also can provide option to be set up on their own by photographer.Set option and comprise the color of color mark frame 41 and the scope of institute's frame eye areas 30, the scope that black-and-white image 42 is comprised, the voice signal length that camera head produces, and the literal that indicated of letter signal 43 and the position in image 20.
By the method that eye sight line disclosed in this invention is judged, the sight line that photographer need not the one by one visual person of being taken, or find out from the LCD screen of camera head and to watch the not square person of being taken attentively.And sound that can be directly produces from camera head or the cue from image or alarm signal are learnt the person's of being taken sight line, shoot the photo that the person of being taken is all watching camera head attentively like a cork.
Claims (10)
1. the method that eye sight line is judged is applied to a camera head, and this camera head comprises an image unit, and this method comprises:
Obtain an image by this image unit;
Analyze this image to obtain at least one eye areas in this image;
Analyze this eye areas to obtain an eye feature;
Utilize this eye feature to calculate a feature ratio;
Produce at least one alarm signal according to this feature ratio selectivity; And
Selectivity shows this image and in conjunction with this image of this alarm signal.
2. the method that eye sight line as claimed in claim 1 is judged, wherein analyze this image and comprise with the step that obtains this eye areas in this image: the feature contour comparison of carrying out this image is to obtain this eye areas.
3. the method that eye sight line as claimed in claim 1 is judged, the step of wherein utilizing this eye feature to calculate this feature ratio comprises:
Capture this pupil and this eye socket in this eye feature;
Calculate a relative distance of this pupil and this eye socket; And
Judge that according to this relative distance this pupil is positioned at the position of this eye socket.
4. the method that eye sight line as claimed in claim 3 is judged also comprises:
Detect the profile of this pupil;
Estimate the radius of the profile of this pupil; And
A particular percentile of calculating this radius is to obtain a difference value;
Wherein judge that according to this relative distance the step that this pupil is positioned at the position of this eye socket comprises: by relatively this relative distance and this difference value judge that this pupil is positioned at the position of this eye socket.
5. the method that eye sight line as claimed in claim 4 is judged, wherein this particular percentile is 30%.
6. the method that eye sight line as claimed in claim 3 is judged, the step of wherein calculating this relative distance of this pupil and this eye socket comprises:
Analyze the central point of this pupil;
Analyze the central point of this eye socket; And
Calculating is by this relative distance between the central point of the central point of this pupil and this eye socket.
7. the method that eye sight line as claimed in claim 3 is judged, wherein judge that according to this relative distance the step that this pupil is positioned at the position of this eye socket comprises:
When this relative distance less than this difference value, judge that this pupil is positioned at the center of this eye socket; And
When this relative distance greater than this difference value, judge that this pupil is positioned at outside the center of this eye socket.
8. the method that eye sight line as claimed in claim 1 is judged, wherein the step that produces this alarm signal according to this feature ratio selectivity comprises:
Express the middle position that this pupil is positioned at this eye socket when this feature ratio, do not produce this alarm signal; And
Outside this feature ratio is expressed the middle position that this pupil is positioned at this eye socket, produce this alarm signal.
9. the method that eye sight line as claimed in claim 8 is judged, wherein this alarm signal comes across in this image through judging that this pupil is positioned at this eye areas outside the middle position of this eye socket.
10. the method that eye sight line as claimed in claim 1 is judged, wherein the step that produces this alarm signal according to this feature ratio selectivity comprises:
Produce this alarm signal and a cue according to this feature ratio selectivity;
Wherein selectivity shows this image and comprises in conjunction with the step of this image of this alarm signal:
Selectivity shows in conjunction with this image of this cue with in conjunction with this image of this alarm signal.
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| CN200810128246A CN101620359A (en) | 2008-07-04 | 2008-07-04 | Judging method of eye sight line |
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| CN200810128246A CN101620359A (en) | 2008-07-04 | 2008-07-04 | Judging method of eye sight line |
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| US8482626B2 (en) | 2009-04-07 | 2013-07-09 | Mediatek Inc. | Digital camera and image capturing method |
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| US8823826B2 (en) | 2009-04-07 | 2014-09-02 | Mediatek Inc. | Digital camera and image capturing method |
| US8994847B2 (en) | 2009-04-07 | 2015-03-31 | Mediatek Inc. | Digital camera and image capturing method |
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| CN110110677A (en) * | 2014-03-10 | 2019-08-09 | 高通股份有限公司 | Blink and transfer in photographs, which are watched attentively, to be avoided |
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| CN109478334A (en) * | 2016-07-20 | 2019-03-15 | 富士胶片株式会社 | Pay close attention to position identification device, photographic device, display device, concern location recognition method and program |
| CN109478334B (en) * | 2016-07-20 | 2021-04-20 | 富士胶片株式会社 | Target position recognition device, imaging device, display device, target position recognition method, and non-transitory tangible medium |
| CN107967052A (en) * | 2016-10-19 | 2018-04-27 | 匹克赛显示器株式会社 | For controlling the user equipment of display and being stored in the program of computer-readable storage medium |
| CN107817899A (en) * | 2017-11-24 | 2018-03-20 | 姜翠英 | A kind of user watches content real-time analysis method |
| CN107817899B (en) * | 2017-11-24 | 2018-06-26 | 南京同睿信息科技有限公司 | A kind of user watches content real-time analysis method |
| CN108509037A (en) * | 2018-03-26 | 2018-09-07 | 维沃移动通信有限公司 | A kind of method for information display and mobile terminal |
| CN108509037B (en) * | 2018-03-26 | 2021-04-02 | 维沃移动通信有限公司 | Information display method and mobile terminal |
| CN108805606A (en) * | 2018-04-28 | 2018-11-13 | 北京鸿途信达科技股份有限公司 | Internet advertising device and method |
| CN109583292A (en) * | 2018-10-11 | 2019-04-05 | 杭州电子科技大学 | A kind of visibility region detection method |
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Open date: 20100106 |