CN105739706B - Control method, control device and electronic device - Google Patents
Control method, control device and electronic device Download PDFInfo
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- CN105739706B CN105739706B CN201610116251.5A CN201610116251A CN105739706B CN 105739706 B CN105739706 B CN 105739706B CN 201610116251 A CN201610116251 A CN 201610116251A CN 105739706 B CN105739706 B CN 105739706B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/011—Arrangements for interaction with the human body, e.g. for user immersion in virtual reality
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/20—Image preprocessing
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/16—Human faces, e.g. facial parts, sketches or expressions
- G06V40/161—Detection; Localisation; Normalisation
- G06V40/165—Detection; Localisation; Normalisation using facial parts and geometric relationships
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/20—Image preprocessing
- G06V10/24—Aligning, centring, orientation detection or correction of the image
- G06V10/247—Aligning, centring, orientation detection or correction of the image by affine transforms, e.g. correction due to perspective effects; Quadrilaterals, e.g. trapezoids
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2250/00—Details of telephonic subscriber devices
- H04M2250/52—Details of telephonic subscriber devices including functional features of a camera
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- Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- General Physics & Mathematics (AREA)
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Abstract
The invention discloses a kind of control methods, for controlling imaging device.Control method includes processing step and calculating step.Processing step handles the preview image of imaging device acquisition to identify face and obtain the area of face.Calculating step is according to the areal calculation face of face at a distance from imaging device.In addition, the invention also discloses a kind of control device and electronic devices.Control method, control device and electronic device of the invention determines face shot according to the relationship of face area and distance in preview image at a distance from imaging device, in this way, saving cost it is not necessary that ranging can be realized by increasing other hardware.
Description
Technical field
The present invention relates to imaging technique, in particular to a kind of control method, control device and electronic device.
Background technique
Current mobile phone is the range information for obtaining object, it usually needs hardware means are realized, such as the double camera shootings of installation
Head, but higher cost.
Summary of the invention
The present invention is directed at least solve one of the technical problems existing in the prior art.For this purpose, the present invention needs to provide one
Kind.
The control method of embodiment of the present invention, for controlling imaging device, control method includes:
Processing step handles the preview image of the imaging device acquisition to identify face and obtain the face of the face
Product；And
Step is calculated, according to face described in the areal calculation at a distance from the imaging device.
The control device of embodiment of the present invention, for controlling imaging device, the control device includes:
Processing module, the processing module are used to handle the preview image of the imaging device acquisition to identify face and obtain
Take the area of the face；And
Computing module, the computing module for the face according to the areal calculation and the imaging device away from
From.
The electronic device of embodiment of the present invention, including imaging device and control device as described above.
Control method, control device and the electronic device of embodiment of the present invention, according to face area in preview image with
The relationship of distance come determine face shot at a distance from imaging device, in this way, without by increase other hardware survey can be realized
Away from saving cost.
The advantages of additional aspect of the invention, will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect and advantage of the invention is from combining in description of the following accompanying drawings to embodiment by change
It obtains obviously and is readily appreciated that, in which:
Fig. 1 is the flow diagram of the control method of embodiment of the present invention.
Fig. 2 is the functional block diagram of the control device of embodiment of the present invention.
Fig. 3 is the flow diagram of the control method of certain embodiments of the present invention.
Fig. 4 is the status diagram of the control method of certain embodiments of the present invention.
Fig. 5 is the flow diagram of the control method of certain embodiments of the present invention.
Fig. 6 is the functional block diagram of the control device of certain embodiments of the present invention.
Fig. 7 is the status diagram of the control method of certain embodiments of the present invention.
Specific embodiment
Embodiments of the present invention are described below in detail, the example of the embodiment is shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, embodiment for explaining only the invention, and should not be understood as to this hair
The limitation of bright embodiment.
Referring to Fig. 1, the control method of embodiment of the present invention, for controlling imaging device.
Control method comprising steps of
S10, the preview image that processing imaging device obtains is to identify face and obtain the area of face；And
S20, according to the areal calculation face of face at a distance from imaging device.
Referring to Fig. 2, the control device 100 of embodiment of the present invention includes processing module 10 and computing module 20.As
The control method of example, embodiment of the present invention can be realized by control device 100, can be applied to electronic device 1000.Electronics
Device 1000 may include control device 100 and imaging device 200.
Wherein, the step S10 of the control method of embodiment of the present invention can be realized by processing module 10, and step S20
It can be realized by computing module 20.In other words, processing module 10 is used to handle the preview image of imaging device acquisition to identify
Face and the area for obtaining face.Computing module 20 is used for the areal calculation face according to face at a distance from imaging device 200.
Under normal conditions, when being focused and being taken pictures using certain focal modes, such as contrast formula focal modes, it can not
Directly acquire the object distance information of object.And the depth of field or virtualization and other effects can be realized in picture processing by obtaining range information,
So that user possesses better user experience.
When taking pictures, user opens electronic device 1000 and enters camera applications, and electronic device 1000 can be mobile phone, and by hand
For the display screen of machine as view finder, user can observe the shooting state of object by display screen, and user is by by object
It is placed in focus frame and imaging device 200 is made to obtain the object for needing to focus.In addition, user can also be selected by modes such as clicks
Take object.
The preview image that the output of imaging device 200 obtains, and preview image is handled by processing module 10, so may be used
It identifies the human face region in preview image and the area of human face region can be obtained by establishing the modes such as coordinate.Recognition of face is logical
It can often be identified by feature to face and the colour of skin to realize.Computing module 20 is counted according to the area of the face identified
Face is calculated at a distance from imaging device 200.
In conclusion the control method of embodiment of the present invention, control device 100 and electronic device 1000, according to preview
The relationship of face area and distance determines the face shot at a distance from imaging device 200 in image.In this way, without passing through increase
Ranging can be realized in other hardware, saves cost.
In some embodiments, electronic device 1000 can be the electronics that mobile phone or tablet computer etc. have camera function
Terminal.And imaging device 200 includes preposition and/or rearmounted camera.
It is appreciated that electronic device 1000 includes but is not limited to the example of present embodiment.
Please refer to such as 3, in some embodiments, step S20 comprising steps of
S21 establishes the corresponding relationship of face area and distance；And
S22 calculates face at a distance from imaging device 200 according to the corresponding relationship.
Step S21 and step S22 can be realized by computing module 20.
Referring to Fig. 4, it is appreciated that according to the Perspective Principles of composition, for same user shot, when user distance camera lens
When closer, the area of the face in preview image is bigger.Analogously, when the user distance camera lens is remoter, in preview image
Face area it is smaller.In operation, using such relationship, the corresponding relationship of face area and distance is established.Make subsequent
In, current face can be directly obtained according to the corresponding relationship after identifying face area at a distance from imaging device 200.
Wherein, which can be tested before factory by choosing the model that size does not wait, and to knot
Fruit carries out statistical procedures, such as remove average value etc., and result generates area-distance correspondence table by treated.It is corresponding
Relation table can store in the memory of electronic device 1000, to be transferred when needed.
In some embodiments, step S20 calculates face at a distance from imaging device 200 using following conditional:
D=k/S ... (1)；
Wherein, d is face at a distance from imaging device 200, and S is the area of face, and k is proportionality coefficient.
By the explanation of above embodiment it is found that the area S and distance d of face meet perspective relation, in other words S
It is in anti-correlation with d.Wherein, proportionality coefficient can be measured before factory by experiment.In operation, when the area for detecting face
When, corresponding distance value d can be calculated by conditional (1).
Referring to Fig. 5, in some embodiments, being further comprised the steps of: after step S20
S30, judges whether distance is less than preset distance；And
S40 corrects the distance when distance is less than preset distance.
Referring to Fig. 6, in some embodiments, control device 100 further includes judgment module 30 and correction module 40.Step
Rapid S30 may determine that module 30 is realized, and step S40 can be realized by correction module 40.In other words, judgment module 30 is for sentencing
Whether turn-off is from less than preset distance.And correction module 40 is used for the corrected range when distance is less than preset distance.
Referring to Fig. 7, according to the selection of the visual angle of the camera lens of imaging device 200 and related hardware parameter, it is special when taking pictures
When not being shooting portrait, since the enlargement ratio of optical center is different from the enlargement ratio at camera lens edge, it is located at camera lens side
The face of edge can generate a degree of torsional deformation, that is to say distortion.Reflect in the picture, usually face edge broad in the middle
Small, the face that can seem is stretched side length.Further it will be understood that since face is not a plane but a bumps
Solid, in hypotelorism of the face apart from camera lens by Perspective Principles it is found that can be shown closer to the nose of camera lens, mouth part
Must be bigger, and the ear far from camera lens can seem small, and entire face can also seem bigger on the basis of normal size.By
This, can generate distortion when face closely that is to say that object distance is too small excessively when shooting.
It should be noted that face is closer at a distance from imaging device 200, distortion degree, that is, face deformation extent is got over
Greatly, it is believed that after distance is less than preset distance, the distance obtained is calculated by conditional (1) since the distortion of face will lead to
Error it is larger.
In other words, when hypotelorism when face apart from camera lens, since the distortion of camera lens will be so that the area of face will be sent out
Raw distortion, can make the area of face bigger, so that face is calculated to the distance of imaging device 200 in influence.Therefore, it is necessary to
Calculated result at this time is modified, accurate distance value will be obtained after amendment.
In some embodiments, step S40 is adjusted the distance using following conditional and is modified:
D=k1/S ... (2)；
Wherein, d is distance of the face to imaging device 200, and S is the area of face, and k1 is amendment proportionality coefficient.
Such as the explanation of above embodiment, when being less than preset distance by conditional (1) calculated distance d,
Think distance d inaccuracy, needs to be modified.When amendment, using amendment proportionality coefficient k1 according to the area of the face of identification
Recalculate distance d.Correct the relating to parameters of proportionality coefficient k1 and camera lens.
The control device 100 and electronic device 1000 of embodiment of the present invention other parts undeployed, can join the above reality
The corresponding part for applying the control method of mode, is no longer developed in details herein.
In the description of embodiments of the present invention, it is to be understood that term " center ", " longitudinal direction ", " transverse direction ", " length
Degree ", " width ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner",
The orientation or positional relationship of the instructions such as "outside", " clockwise ", " counterclockwise " is to be based on the orientation or positional relationship shown in the drawings, only
It is embodiments of the present invention and simplified description for ease of description, rather than the device or element of indication or suggestion meaning are necessary
It with specific orientation, is constructed and operated in a specific orientation, therefore should not be understood as the limitation to embodiments of the present invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more feature.In the description of embodiments of the present invention, the meaning of " plurality " is two
It is a or more than two, unless otherwise specifically defined.
In the description of embodiments of the present invention, it should be noted that unless otherwise clearly defined and limited, term
" installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be mechanical connection, be also possible to be electrically connected or can mutually communicate；It can be directly connected, can also lead to
It crosses intermediary to be indirectly connected, can be the connection inside two elements or the interaction relationship of two elements.For ability
For the those of ordinary skill in domain, can understand as the case may be above-mentioned term in embodiments of the present invention specifically contain
Justice.
In embodiments of the present invention unless specifically defined or limited otherwise, fisrt feature second feature it
"upper" or "lower" may include that the first and second features directly contact, may include the first and second features be not directly to connect yet
It touches but by the other characterisation contact between them.Moreover, fisrt feature second feature " on ", " top " and " on
Face " includes fisrt feature right above second feature and oblique upper, or to be merely representative of first feature horizontal height special higher than second
Sign.Fisrt feature under the second feature " below ", " below " and " below " include fisrt feature right above second feature and tiltedly on
Side, or first feature horizontal height is merely representative of less than second feature.
Above disclosure provides many different embodiments or example is used to realize embodiments of the present invention not
Same structure.In order to simplify the disclosure of embodiments of the present invention, above the component of specific examples and setting are described.When
So, they are merely examples, and is not intended to limit the present invention.In addition, embodiments of the present invention can be in different examples
Repeat reference numerals and/or reference letter in son, this repetition are for purposes of simplicity and clarity, itself not indicate to be begged for
By the relationship between various embodiments and/or setting.In addition, the various specific techniques that embodiments of the present invention provide
With the example of material, but those of ordinary skill in the art may be aware that the application of other techniques and/or other materials make
With.
In the description of this specification, reference term " embodiment ", " some embodiments ", " schematically implementation
The description of mode ", " example ", specific examples or " some examples " etc. means the tool described in conjunction with the embodiment or example
Body characteristics, structure, material or feature are contained at least one embodiment or example of the invention.In the present specification,
Schematic expression of the above terms are not necessarily referring to identical embodiment or example.Moreover, the specific features of description, knot
Structure, material or feature can be combined in any suitable manner in any one or more embodiments or example.
Any process described otherwise above or method description are construed as in flow chart or herein, and expression includes
It is one or more for realizing specific logical function or process the step of executable instruction code module, segment or portion
Point, and the range of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discussed suitable
Sequence, including according to related function by it is basic simultaneously in the way of or in the opposite order, to execute function, this should be of the invention
Embodiment person of ordinary skill in the field understood.
Expression or logic and/or step described otherwise above herein in flow charts, for example, being considered use
In the order list for the executable instruction for realizing logic function, may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment (such as computer based system, including the system of processing module or other can be from instruction
Execute system, device or equipment instruction fetch and the system that executes instruction) use, or combine these instruction execution systems, device or
Equipment and use.For the purpose of this specification, " computer-readable medium " can be it is any may include, store, communicating, propagating or
Transfer program uses for instruction execution system, device or equipment or in conjunction with these instruction execution systems, device or equipment
Device.The more specific example (non-exhaustive list) of computer-readable medium include the following: there are one or more wirings
Electrical connection section (electronic device), portable computer diskette box (magnetic device), random access memory (RAM), read-only memory
(ROM), erasable edit read-only storage (EPROM or flash memory), fiber device and portable optic disk is read-only deposits
Reservoir (CDROM).In addition, computer-readable medium can even is that the paper that can print described program on it or other are suitable
Medium, because can then be edited, be interpreted or when necessary with it for example by carrying out optical scanner to paper or other media
His suitable method is handled electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each section of embodiments of the present invention can be with hardware, software, firmware or their combination come real
It is existing.In the above-described embodiment, multiple steps or method can be with storages in memory and by suitable instruction execution system
The software or firmware of execution is realized.For example, if realized with hardware, in another embodiment, ability can be used
Any one of following technology or their combination well known to domain is realized: being had for realizing logic function to data-signal
The discrete logic of logic gates, the specific integrated circuit with suitable combinational logic gate circuit, programmable gate array
(PGA), field programmable gate array (FPGA) etc..
Those skilled in the art are understood that realize all or part of step that above-described embodiment method carries
It suddenly is that relevant hardware can be instructed to complete by program, the program can store in a kind of computer-readable storage medium
In matter, which when being executed, includes the steps that one or a combination set of embodiment of the method.
In addition, each functional unit in various embodiments of the present invention can integrate in a processing module, it can also
To be that each unit physically exists alone, can also be integrated in two or more units in a module.It is above-mentioned integrated
Module both can take the form of hardware realization, can also be realized in the form of software function module.The integrated module
If in the form of software function module realize and when sold or used as an independent product, also can store one calculating
In machine read/write memory medium.
Storage medium mentioned above can be read-only memory, disk or CD etc..
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (11)
1. a kind of control method, for controlling imaging device, which is characterized in that the control method includes:
Processing step handles the preview image of the imaging device acquisition to identify face and obtain the area of the face；
Step is calculated, according to face described in the areal calculation at a distance from the imaging device
Judgment step, judges whether the distance is less than preset distance；And
Amendment step corrects the distance when the distance is less than the preset distance.
2. control method as described in claim 1, which is characterized in that the calculating step includes:
Establish the corresponding relationship of the area Yu the distance；And
The distance is calculated according to the corresponding relationship.
3. control method as described in claim 1, which is characterized in that the calculating step is using described in the calculating of following conditional
Distance:
D=k/S；
Wherein, d is the distance, and S is the area, and k is proportionality coefficient；
Judgment step, judges whether the distance is less than preset distance；And
Amendment step corrects the distance when the distance is less than the preset distance.
4. control method as described in claim 1, which is characterized in that the amendment step is using described in the amendment of following conditional
Distance:
D=k1/S；
Wherein, d is the distance, and S is the area, and k1 is amendment proportionality coefficient.
5. a kind of control device, for controlling imaging device, which is characterized in that the control device includes:
Processing module, the processing module are used to handle the preview image of the imaging device acquisition to identify face and obtain institute
State the area of face；
Computing module, the computing module is for the face according to the areal calculation at a distance from the imaging device；
Judgment module, the judgment module is for judging whether the distance is less than preset distance；And
Correction module, the correction module are used to correct the distance when the distance is less than the preset distance.
6. control device as claimed in claim 5, which is characterized in that the computing module for establish the area with it is described
The corresponding relationship of distance simultaneously calculates the distance according to the corresponding relationship.
7. control device as claimed in claim 5, which is characterized in that the computing module is used to calculate using following conditional
The distance:
D=k/S；
Wherein, d is the distance, and S is the area, and k is proportionality coefficient.
8. control device as claimed in claim 5, which is characterized in that the correction module is used to correct using following conditional
The distance:
D=k1/S；
Wherein, d is the distance, and S is the area, and k1 is amendment proportionality coefficient.
9. a kind of electronic device, which is characterized in that the control dress including imaging device and as described in claim 5-8 any one
It sets.
10. electronic device as claimed in claim 9, which is characterized in that the electronic device includes mobile phone or tablet computer.
11. electronic device as claimed in claim 9, which is characterized in that the imaging device includes Front camera and/or postposition
Camera.
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| CN201610116251.5A CN105739706B (en) | 2016-02-29 | 2016-02-29 | Control method, control device and electronic device |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109977727A (en) * | 2017-12-27 | 2019-07-05 | 广东欧珀移动通信有限公司 | Sight protectio method, apparatus, storage medium and mobile terminal |
| CN108924417A (en) * | 2018-07-02 | 2018-11-30 | Oppo（重庆）智能科技有限公司 | Filming control method and Related product |
| CN113037990B (en) * | 2019-12-24 | 2022-09-06 | Tcl科技集团股份有限公司 | Auxiliary shooting method, terminal device and computer-readable storage medium |
| CN111307331A (en) * | 2020-04-02 | 2020-06-19 | 广东博智林机器人有限公司 | Temperature calibration method, device, equipment and storage medium |
| WO2022001630A1 (en) * | 2020-06-29 | 2022-01-06 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Method and system for capturing at least one smart media |
| CN113449670B (en) * | 2021-07-09 | 2022-04-15 | 浙江正元智慧科技股份有限公司 | Drowsiness detection method based on human eye state |
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| CN104699231A (en) * | 2013-12-05 | 2015-06-10 | 北京东方正龙数字技术有限公司 | Eyeball recognition based automatic adjustment display equipment and automatic adjustment method thereof |
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| CN100578531C (en) * | 2007-11-08 | 2010-01-06 | 北京中星微电子有限公司 | Display, device and method for accomplishing sight protection |
| 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 |
| US20100157135A1 (en) * | 2008-12-18 | 2010-06-24 | Nokia Corporation | Passive distance estimation for imaging algorithms |
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| CN202158851U (en) * | 2011-07-29 | 2012-03-07 | 北京联合大学 | Single-camera range finding system |
| CN104699231A (en) * | 2013-12-05 | 2015-06-10 | 北京东方正龙数字技术有限公司 | Eyeball recognition based automatic adjustment display equipment and automatic adjustment method thereof |
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