CN107613200A - A kind of focus adjustment method, equipment and computer-readable recording medium - Google Patents
A kind of focus adjustment method, equipment and computer-readable recording medium Download PDFInfo
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- CN107613200A CN107613200A CN201710819446.0A CN201710819446A CN107613200A CN 107613200 A CN107613200 A CN 107613200A CN 201710819446 A CN201710819446 A CN 201710819446A CN 107613200 A CN107613200 A CN 107613200A
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Abstract
The embodiment of the invention discloses a kind of focus adjustment method, methods described includes：Obtain the first object in the viewfinder image of image acquisition units；Judge whether include default feature in the characteristic information of the first object；If not including the default feature in the characteristic information of the first object, the first focal length is determined according to preset rules；The focal length for adjusting image acquisition units the second object of collection is the first focal length, wherein, the first object is the preview subject of the second object.The embodiment of the present invention also discloses a kind of focus adjustment equipment and computer-readable recording medium simultaneously.
Description
Technical field
The present invention relates to acquisition technology field, more particularly to a kind of focus adjustment method, equipment and computer-readable
Storage medium.
Background technology
With the development of science and technology intelligent terminal particularly smart mobile phone turns into electricity essential in people's daily life
Sub- equipment.Meanwhile with the continuous improvement of mobile phone camera resolution ratio and increasingly mature, the mobile phone gradual generation of mobile phone photograph technology
Turn into the daily portable tool taken pictures of people for camera.In the existing scheme by mobile phone photograph, when need shoot to image distance
When nearer from camera, it may appear that the facial information for the object for needing to shoot can not intactly be presented on the feelings in viewfinder image
Condition.
But the scheme to solve the above problems at present is the manual cell phone of user or adjusts Jiao of camera manually
Away from so that the facial information for the object for needing to shoot also can be showed intactly；But when being adjusted in this way,
Need user constantly the position of cell phone or constantly to focus manually, cause gatherer process cumbersome, degree of intelligence is relatively low.
The content of the invention
In view of this, the embodiment of the present invention it is expected to provide a kind of focus adjustment method, equipment and computer-readable storage medium
Matter, conveniently and efficiently to gather the object for needing to shoot, improve degree of intelligence.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
A kind of focus adjustment method, methods described include：
Obtain the first object in the viewfinder image of image acquisition units；
Judge whether include default feature in the characteristic information of first object；
If not including the default feature in the characteristic information of first object, determine that first is burnt according to preset rules
Away from；
The focal length for adjusting described image collecting unit the second object of collection is first focal length, wherein, described first pair
As the preview subject for second object.
Optionally, default feature whether is included in the characteristic information for judging first object, including:
Identify the face contour of first object；
Judge in the face contour of first object with the presence or absence of incomplete face contour；
If incomplete face contour in the face contour of first object be present, the spy of first object is judged
Do not include the default feature in reference breath.
Optionally, it is described to determine the first focal length according to preset rules, including：
Obtain the object distance of first object；
Obtain the face contour size of first object；
According to the object distance of first object and the face contour size, first focal length is determined.
Optionally, the object distance according to first object and the face contour size, determine first focal length,
Including：
The face contour size of first object and the ratio of default face contour size are calculated, obtains face contour ratio
Value；
Obtain the corresponding relation between object distance and ratio and focal length；
Object distance and the face contour ratio based on first object, between the object distance and ratio and focal length
First focal length is searched in corresponding relation.
Optionally, after whether including default feature in the characteristic information for judging first object, in addition to：
If the characteristic information of first object includes the default feature, determine that first object is found a view with described
The ratio of image, obtains ratio value；
Judge whether the ratio value is less than the preset ratio value；
If the ratio value is less than the preset ratio value, the difference between the ratio value and the preset ratio value is determined
Value, obtains proportional difference；
According to the proportional difference and difference and the corresponding relation of focal length, the 3rd focal length is determined；
The focal length for adjusting described image collecting unit collection second object is the 3rd focal length.
A kind of focus adjustment equipment, the focus adjustment equipment include processor, memory and communication bus；
The communication bus, for realizing the connection communication between the processor and the memory；
The processor, for performing the focus adjustment program stored in the memory, to realize following steps：
Obtain the first object in the viewfinder image of image acquisition units；
Judge whether include default feature in the characteristic information of first object；
If not including the default feature in the characteristic information of first object, determine that first is burnt according to preset rules
Away from；
The focal length for adjusting described image collecting unit the second object of collection is first focal length, wherein, described first pair
As the preview subject for second object.
Optionally, the processor is used to perform the focus adjustment program that stores in the memory, with implement with
Lower step：
Identify the face contour of first object；
Judge in the face contour of first object with the presence or absence of incomplete face contour；
If incomplete face contour in the face contour of first object be present, the spy of first object is judged
Do not include the default feature in reference breath.
Optionally, the processor is used to perform the focus adjustment program that stores in the memory, with implement with
Lower step：
Obtain the object distance of first object；
Obtain the face contour size of first object；
According to the object distance of first object and the face contour size, first focal length is determined.
Optionally, the processor is additionally operable to perform the focus adjustment program stored in the memory, following to realize
Step：
If the characteristic information of first object includes the default feature, determine that first object is found a view with described
The ratio of image, obtains ratio value；
Judge whether the ratio value is less than the preset ratio value；
If the ratio value is less than the preset ratio value, the difference between the ratio value and the preset ratio value is determined
Value, obtains proportional difference；
According to the proportional difference and difference and the corresponding relation of focal length, the 3rd focal length is determined；
The focal length for adjusting described image collecting unit collection second object is the 3rd focal length.
A kind of computer-readable recording medium, the computer-readable recording medium storage have one or more focal length tune
Program is saved, one or more of focus adjustment programs can be described above to realize by one or more computing device
The step of focus adjustment method.
Focus adjustment method, equipment and the computer-readable recording medium that the embodiment of the present invention is provided, figure is obtained first
As collecting unit viewfinder image in the first object, next, it is judged that whether including in the characteristic information of the first object default
Feature, if not including default feature in the characteristic information of the first object, the first focal length is determined according to preset rules, then,
The focal length for adjusting image acquisition units the second object of collection is the first focal length, wherein, the first object is the preview pair of the second object
As.So, it is assumed that incomplete face contour in the characteristic information of the preview subject of the second object be present, then, can be with basis
The characteristic information of first object adjusts the focal length of image acquisition units, to change when image acquisition units gather the second object
Wide-angle, so that incomplete face contour in viewfinder image no longer be present, it can conveniently and efficiently collect the complete of the second object
Whole face-image, improves degree of intelligence.
Brief description of the drawings
Fig. 1 is a kind of hardware architecture diagram for the mobile terminal for realizing each embodiment of the present invention；
Fig. 2 is a kind of communications network system Organization Chart provided in an embodiment of the present invention；
Fig. 3 is a kind of flow chart of focus adjustment method provided in an embodiment of the present invention；
Fig. 4 is the flow chart of another focus adjustment method provided in an embodiment of the present invention；
Fig. 5 is a kind of focus adjustment equipment application schematic diagram of a scenario provided in an embodiment of the present invention；
Fig. 6 is a kind of focus adjustment equipment application schematic diagram of a scenario corresponding with Fig. 5 provided in an embodiment of the present invention；
Fig. 7 is the flow chart of another focus adjustment method provided in an embodiment of the present invention；
Fig. 8 is another focus adjustment equipment application schematic diagram of a scenario provided in an embodiment of the present invention；
Fig. 9 is another focus adjustment equipment application schematic diagram of a scenario corresponding with Fig. 8 provided in an embodiment of the present invention；
Figure 10 is a kind of structural representation of focus adjustment equipment provided in an embodiment of the present invention.
Embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
In follow-up description, the suffix using such as " module ", " part " or " unit " for representing element is only
Be advantageous to the explanation of the present invention, itself there is no a specific meaning.Therefore, " module ", " part " or " unit " can mix
Ground uses.
Terminal can be implemented in a variety of manners.For example, the terminal described in the present invention can include such as mobile phone, flat board
Computer, notebook computer, palm PC, personal digital assistant (Personal Digital Assistant, PDA), portable
Media player (Portable Media Player, PMP), guider, wearable device, Intelligent bracelet, pedometer etc. move
Dynamic terminal, and the fixed terminal such as digital TV, desktop computer.
It will be illustrated in subsequent descriptions by taking mobile terminal as an example, it will be appreciated by those skilled in the art that except special
Outside element for moving purpose, construction according to the embodiment of the present invention can also apply to the terminal of fixed type.
Referring to Fig. 1, its hardware architecture diagram for a kind of mobile terminal of each embodiment of the realization present invention, the shifting
Dynamic terminal 100 can include：RF (Radio Frequency, radio frequency) unit 101, WiFi module 102, audio output unit
103rd, A/V (audio/video) input block 104, sensor 105, display unit 106, user input unit 107, interface unit
108th, the part such as memory 109, processor 110 and power supply 111.It will be understood by those skilled in the art that shown in Fig. 1
Mobile terminal structure does not form the restriction to mobile terminal, and mobile terminal can be included than illustrating more or less parts,
Either combine some parts or different parts arrangement.
The all parts of mobile terminal are specifically introduced with reference to Fig. 1：
Radio frequency unit 101 can be used for receiving and sending messages or communication process in, the reception and transmission of signal, specifically, by base station
Downlink information receive after, handled to processor 110；In addition, up data are sent to base station.Generally, radio frequency unit 101
Including but not limited to antenna, at least one amplifier, transceiver, coupler, low-noise amplifier, duplexer etc..In addition, penetrate
Frequency unit 101 can also be communicated by radio communication with network and other equipment.Above-mentioned radio communication can use any communication
Standard or agreement, including but not limited to GSM (Global System of Mobile communication, global system for mobile telecommunications
System), GPRS (General Packet Radio Service, general packet radio service), CDMA2000 (Code
Division Multiple Access 2000, CDMA 2000), WCDMA (Wideband Code Division
Multiple Access, WCDMA), TD-SCDMA (Time Division-Synchronous Code
Division Multiple Access, TD SDMA), FDD-LTE (Frequency Division
Duplexing-Long Term Evolution, FDD Long Term Evolution) and TDD-LTE (Time Division
Duplexing-Long Term Evolution, time division duplex Long Term Evolution) etc..
WiFi belongs to short range wireless transmission technology, and mobile terminal can help user to receive and dispatch electricity by WiFi module 102
Sub- mail, browse webpage and access streaming video etc., it has provided the user wireless broadband internet and accessed.Although Fig. 1 shows
Go out WiFi module 102, but it is understood that, it is simultaneously not belonging to must be configured into for mobile terminal, completely can be according to need
To be omitted in the essential scope for do not change invention.
Audio output unit 103 can be in call signal reception pattern, call mode, record mould in mobile terminal 100
When under the isotypes such as formula, speech recognition mode, broadcast reception mode, by radio frequency unit 101 or WiFi module 102 it is receiving or
It is sound that the voice data stored in memory 109, which is converted into audio signal and exported,.Moreover, audio output unit 103
The audio output related to the specific function that mobile terminal 100 performs can also be provided (for example, call signal receives sound, disappeared
Breath receives sound etc.).Audio output unit 103 can include loudspeaker, buzzer etc..
A/V input blocks 104 are used to receive audio or video signal.A/V input blocks 104 can include graphics processor
(Graphics Processing Unit, GPU) 1041 and microphone 1042, graphics processor 1041 is in video acquisition mode
Or the static images or the view data of video obtained in image capture mode by image capture apparatus (such as camera) are carried out
Reason.Picture frame after processing may be displayed on display unit 106.Picture frame after the processing of graphics processor 1041 can be deposited
Storage is transmitted in memory 109 (or other storage mediums) or via radio frequency unit 101 or WiFi module 102.Mike
Wind 1042 can connect in telephone calling model, logging mode, speech recognition mode etc. operational mode via microphone 1042
Quiet down sound (voice data), and can be voice data by such acoustic processing.Audio (voice) data after processing can
To be converted to the form output that mobile communication base station can be sent to via radio frequency unit 101 in the case of telephone calling model.
Microphone 1042 can implement various types of noises and eliminate (or suppression) algorithm to eliminate (or suppression) in reception and send sound
Caused noise or interference during frequency signal.
Mobile terminal 100 also includes at least one sensor 105, such as optical sensor, motion sensor and other biographies
Sensor.Specifically, optical sensor includes ambient light sensor and proximity transducer, wherein, ambient light sensor can be according to environment
The light and shade of light adjusts the brightness of display panel 1061, and proximity transducer can close when mobile terminal 100 is moved in one's ear
Display panel 1061 and/or backlight.As one kind of motion sensor, accelerometer sensor can detect in all directions (general
For three axles) size of acceleration, size and the direction of gravity are can detect that when static, the application available for identification mobile phone posture
(such as horizontal/vertical screen switching, dependent game, magnetometer pose calibrating), Vibration identification correlation function (such as pedometer, percussion) etc.；
The fingerprint sensor that can also configure as mobile phone, pressure sensor, iris sensor, molecule sensor, gyroscope, barometer,
The other sensors such as hygrometer, thermometer, infrared ray sensor, will not be repeated here.
Display unit 106 is used for the information for showing the information inputted by user or being supplied to user.Display unit 106 can wrap
Display panel 1061 is included, liquid crystal display (Liquid Crystal Display, LCD), Organic Light Emitting Diode can be used
Forms such as (Organic Light-Emitting Diode, OLED) configures display panel 1061.
User input unit 107 can be used for the numeral or character information for receiving input, and produce the use with mobile terminal
The key signals input that family is set and function control is relevant.Specifically, user input unit 107 may include contact panel 1071 with
And other input equipments 1072.Contact panel 1071, also referred to as touch-screen, collect touch operation of the user on or near it
(for example user uses any suitable objects or annex such as finger, stylus on contact panel 1071 or in contact panel 1071
Neighbouring operation), and corresponding attachment means are driven according to formula set in advance.Contact panel 1071 may include touch detection
Two parts of device and touch controller.Wherein, the touch orientation of touch detecting apparatus detection user, and detect touch operation band
The signal come, transmits a signal to touch controller；Touch controller receives touch information from touch detecting apparatus, and by it
Contact coordinate is converted into, then gives processor 110, and the order sent of reception processing device 110 and can be performed.In addition, can
To realize contact panel 1071 using polytypes such as resistance-type, condenser type, infrared ray and surface acoustic waves.Except contact panel
1071, user input unit 107 can also include other input equipments 1072.Specifically, other input equipments 1072 can wrap
Include but be not limited to physical keyboard, in function key (such as volume control button, switch key etc.), trace ball, mouse, action bars etc.
One or more, do not limit herein specifically.
Further, contact panel 1071 can cover display panel 1061, detect thereon when contact panel 1071 or
After neighbouring touch operation, processor 110 is sent to determine the type of touch event, is followed by subsequent processing device 110 according to touch thing
The type of part provides corresponding visual output on display panel 1061.Although in Fig. 1, contact panel 1071 and display panel
1061 be the part independent as two to realize the input of mobile terminal and output function, but in certain embodiments, can
Input and the output function of mobile terminal are realized so that contact panel 1071 and display panel 1061 is integrated, is not done herein specifically
Limit.
Interface unit 108 is connected the interface that can pass through as at least one external device (ED) with mobile terminal 100.For example,
External device (ED) can include wired or wireless head-band earphone port, external power source (or battery charger) port, wired or nothing
Line FPDP, memory card port, the port for connecting the device with identification module, audio input/output (I/O) end
Mouth, video i/o port, ear port etc..Interface unit 108 can be used for receiving the input from external device (ED) (for example, number
It is believed that breath, electric power etc.) and the input received is transferred to one or more elements in mobile terminal 100 or can be with
For transmitting data between mobile terminal 100 and external device (ED).
Memory 109 can be used for storage software program and various data.Memory 109 can mainly include storing program area
And storage data field, wherein, storing program area can storage program area, application program (such as the sound needed at least one function
Sound playing function, image player function etc.) etc.；Storage data field can store according to mobile phone use created data (such as
Voice data, phone directory etc.) etc..In addition, memory 109 can include high-speed random access memory, can also include non-easy
The property lost memory, a for example, at least disk memory, flush memory device or other volatile solid-state parts.
Processor 110 is the control centre of mobile terminal, utilizes each of various interfaces and the whole mobile terminal of connection
Individual part, by running or performing the software program and/or module that are stored in memory 109, and call and be stored in storage
Data in device 109, the various functions and processing data of mobile terminal are performed, so as to carry out integral monitoring to mobile terminal.Place
Reason device 110 may include one or more processing units；Preferably, processor 110 can integrate application processor and modulatedemodulate is mediated
Device is managed, wherein, application processor mainly handles operating system, user interface and application program etc., and modem processor is main
Handle radio communication.It is understood that above-mentioned modem processor can not also be integrated into processor 110.
Mobile terminal 100 can also include the power supply 111 (such as battery) to all parts power supply, it is preferred that power supply 111
Can be logically contiguous by power-supply management system and processor 110, so as to realize management charging by power-supply management system, put
The function such as electricity and power managed.
Although Fig. 1 is not shown, mobile terminal 100 can also will not be repeated here including bluetooth module etc..
For the ease of understanding the embodiment of the present invention, the communications network system being based on below to the mobile terminal of the present invention enters
Row description.
Referring to Fig. 2, Fig. 2 is a kind of communications network system Organization Chart provided in an embodiment of the present invention, the communication network system
Unite as the LTE system of universal mobile communications technology, the UE that the LTE system includes communicating connection successively (User Equipment, is used
Family equipment) 201, E-UTRAN (Evolved UMTS Terrestrial Radio Access Network, evolved UMTS lands
Ground wireless access network) 202, EPC (Evolved Packet Core, evolved packet-based core networks) 203 and operator IP operation
204。
Specifically, UE201 can be above-mentioned terminal 100, and here is omitted.
E-UTRAN202 includes eNodeB2021 and other eNodeB2022 etc..Wherein, eNodeB2021 can be by returning
Journey (backhaul) (such as X2 interface) is connected with other eNodeB2022, and eNodeB2021 is connected to EPC203,
ENodeB2021 can provide UE201 to EPC203 access.
EPC203 can include MME (Mobility Management Entity, mobility management entity) 2031, HSS
(Home Subscriber Server, home subscriber server) 2032, other MME2033, SGW (Serving Gate Way,
Gateway) 2034, PGW (PDN Gate Way, grouped data network gateway) 2035 and PCRF (Policy and
Charging Rules Function, policy and rate functional entity) 2036 etc..Wherein, MME2031 be processing UE201 and
The control node of signaling between EPC203, there is provided carrying and connection management.HSS2032 is all to manage for providing some registers
Such as the function of attaching position register (not shown) etc, and preserve some and used about service features, data rate etc.
The special information in family.All customer data can be transmitted by SGW2034, and PGW2035 can provide UE 201 IP
Address is distributed and other functions, and PCRF2036 is strategy and the charging control strategic decision-making of business data flow and IP bearing resources
Point, it selects and provided available strategy and charging control decision-making with charge execution function unit (not shown) for strategy.
IP operation 204 can include internet, Intranet, IMS (IP Multimedia Subsystem, IP multimedia
System) or other IP operations etc..
Although above-mentioned be described by taking LTE system as an example, those skilled in the art it is to be understood that the present invention not only
Suitable for LTE system, be readily applicable to other wireless communication systems, such as GSM, CDMA2000, WCDMA, TD-SCDMA with
And following new network system etc., do not limit herein.
Based on above-mentioned mobile terminal hardware configuration and communications network system, each embodiment of the inventive method is proposed.
The terminal that the method for focus adjustment provided in an embodiment of the present invention can apply to have image acquisition units is (following
Abbreviation terminal) on；Terminal described in the embodiment of the present invention can include such as mobile phone, smart phone, notebook computer,
The mobile terminal of personal digital assistant (PDA), tablet personal computer (PAD), portable media player (PMP), guider etc..
A kind of focus adjustment method that embodiments of the invention provide, as shown in figure 3, this method can include following step
Suddenly：
Step 301：Obtain the first object in the viewfinder image of image acquisition units.
Terminal carries out the collection of image information by image acquisition units, i.e., carries out adopting for image information using camera
Collection；Chief component in image acquisition units is imaging sensor, and imaging sensor mainly includes charge coupled cell
(Charge-coupled Device, CCD) imaging sensor and metal oxide semiconductor device (Complementary
Metal Oxide Semiconductor, CMOS) imaging sensor；It can sense to light, obtain optical signal, together
When can convert optical signal into data signal, and export to graphics processing unit；I.e. image acquisition units can be by optical picture
As being converted to data signal, and export to graphics processing unit, so that graphics processing unit can be to the image information that collects
Handled.
Terminal can get finding a view for image acquisition units when carrying out image information collecting by image acquisition units
Image, you can to get the pre-review information for all images that image acquisition units can currently collect, if terminal has display screen
When, the viewfinder image of image acquisition units can be shown on a display screen；Such as when being taken pictures with mobile phone, Mobile phone screen
The viewfinder image of camera (image acquisition units) can be shown on curtain.Then, terminal will obtain in viewfinder image
One object, the first object therein refer to the preview subject for the object that terminal needs are shot；For example terminal needs to shoot personage couple
As, then, the first object is the who object corresponding preview subject in viewfinder image.
For example, user, in the information of using terminal three who objects of collection, terminal will obtain these three personages couple
As the corresponding preview subject in the viewfinder image of image acquisition units, i.e. three personage's preview subjects.
Step 302：Judge whether include default feature in the characteristic information of the first object.
The characteristic information of image can response diagram as or image-region corresponding to scenery surface nature or boundary characteristic,
The mutual locus that can reflect between the multiple targets split in image or relative direction relation, pass through image
Feature extraction, destination object can be identified and further handled.
First object of the terminal in the viewfinder image of image acquisition units is got, that is, get image acquisition units
After the preview subject of object that shoots is needed in viewfinder image, image recognition technology can be passed through or feature extracting method extracts
Go out the characteristic information of the first characteristics of objects of reaction；Characteristic information therein can include face contour, geometry etc.；Then,
Terminal can judge whether include default feature in the characteristic information of the first object, and the default feature can be all of who object
Facial characteristics, for example can include：Eyes, nose, ear, eyebrow, face etc., if not including in the characteristic information of the first object
Default feature, for example lack face or ear etc. in the first object, then terminal can perform the action of step 303；If first pair
The characteristic information of elephant includes default feature, then terminal does not do any action.
Specifically, terminal can pass through figure after the first object in getting the viewfinder image of image acquisition units
As identification technology either feature extracting method identifies the face contour of the first object, the face wheel of the first object is then judged
With the presence or absence of incomplete face contour in exterior feature, if incomplete face contour in the face contour of the first object be present, such as, face
Do not include eyebrow in contouring, then terminal can perform the action of step 303；If it is not present in the face contour of the first object residual
Scarce face contour, then terminal do not do any action.
Step 303：The first focal length is determined according to preset rules.
Terminal is after the first object in getting the viewfinder image of image acquisition units, if judging the first object
, will be according to preset rules when not including default feature in characteristic information, for example not including face in the face contour of the first object
Determine the first focal length；Preset rules therein are used to, when the characteristic information of the first object includes default feature, determine
First focal length so that image acquisition units with the first focal length gather the first object entity object when, the first object feature letter
The default feature is not included in breath；For example the preset rules can be the corresponding pass between object distance, face contour size and focal length
System, so, terminal can be first to obtain the face contour size of the object distance of the first object and the first object, then according to first pair
The object distance of elephant and the face contour size of the first object determine the first focal length from the corresponding relation.
For example terminal can be pre-established under object distance S, face contour size A and the object distance by substantial amounts of sample data
The corresponding relation S-A-F between the focal length F of the face contour can be completely shown, terminal is being judged to need the personage couple shot
Incomplete face contour in the face contour of the preview subject of elephant be present, for example ear is not present in the face contour of preview subject
When, the object distance of the preview subject can be obtained by range sensor, while the face contour size of the preview subject is obtained, so
Corresponding focal length is found from the S-A-F relations pre-established afterwards, that is, obtains the first focal length.
Step 304：The focal length for adjusting image acquisition units the second object of collection is the first focal length.
Terminal is determining the first focal length according to preset rules, such as according to the object distance of the first object and the face of the first object
, can be to figure after contouring size determines the first focal length from the corresponding relation between object distance, face contour size and focal length
The focal length that the second object is gathered as collecting unit is adjusted, and is the first focal length, at this moment, image acquisition units by the focus adjustment
Second object will be gathered with the first focal length, the first object therein is the preview subject of the second object；Wherein, in object distance, face
In corresponding relation between contouring size and focal length, focal length is that homologue can completely show the size face contour away under
Focal length, therefore, terminal when determining the first focal length according to the corresponding relation, and the second object being gathered with the first focal length,
To obtain the full facial profile of the second object.
The focus adjustment method that the embodiment of the present invention is provided, the in the viewfinder image of image acquisition units is obtained first
One object, next, it is judged that whether including default feature in the characteristic information of the first object, if in the characteristic information of the first object
Do not include default feature, then determine the first focal length according to preset rules, then, regulation image acquisition units gather the second object
Focal length be the first focal length, wherein, the first object be the second object preview subject；So, it is assumed that the preview pair of the second object
The characteristic information of elephant includes the face contour of incompleteness, then, image can be adjusted with characteristic information according to the first object
The focal length of collecting unit, to change wide-angle when image acquisition units gather the second object, so that no longer being deposited in viewfinder image
In the face contour of incompleteness, the full facial image of the second object can be conveniently and efficiently collected, improves degree of intelligence.
In order to more clearly embody the purpose of the present invention, it is further explained on the basis of above-described embodiment
It is bright.
Based on previous embodiment, another focus adjustment method of embodiments of the invention offer, as shown in figure 4, the party
Method may comprise steps of：
Step 401：Obtain the first object in the viewfinder image of image acquisition units.
User can show that image acquisition units are current on the screen of mobile phone and find a view when carrying out self-timer using mobile phone
The current viewfinder image of image, i.e. mobile phone front camera；At this moment, mobile phone obtains the who object in the viewfinder image；Such as
When three people carry out self-timer, the current viewfinder image of front camera can be shown on mobile phone screen, at this moment, mobile phone can obtain
Take preview subject of these three who objects in the viewfinder image.
Step 402：Identify the face contour of the first object.
Mobile phone gets the first object in the viewfinder image of image acquisition units, that is, gets finding a view for front camera
In image after preview subject corresponding to who object to be captured, the feature extraction of image recognition technology or image can be passed through
The face contour of the who object is identified method, such as, using the feature extracting method of image from viewfinder image
The face contour of the who object is extracted in the preview subject of the who object.
Step 403：Judge in the face contour of the first object with the presence or absence of incomplete face contour.
The face contour of the object of handset identity first, that is, identify preview corresponding to who object to be captured in viewfinder image
After the face contour of object, the face contour is detected, judged in the face contour with the presence or absence of incomplete face wheel
Exterior feature, if it is judged that incomplete face contour in the face contour be present, then mobile phone performs the action of step 404；If it is determined that
Go out and incomplete face contour is not present in the face contour, then mobile phone does not perform any action.
Step 404：Obtain the object distance of the first object and the face contour size of the first object.
Mobile phone judges incomplete face contour be present in the face contour of the first object, that is, judges personage to be captured
When incomplete face contour in the face contour of preview subject corresponding to object be present, the face of the incomplete face contour is obtained
Overall size, such as, the face contour size of the incomplete face contour can be obtained by the statistics of edge pixel point, obtained
To the face contour size of the first object；Meanwhile mobile phone can obtain the thing of the first object by the range sensor of itself
Away from.
Step 405：According to the object distance of the first object and face contour size, the first focal length is determined.
After mobile phone gets the object distance of the first object and the face contour size of the first object, the first object can be calculated
Face contour size and default face contour size ratio, obtain face contour ratio；Then obtain object distance and ratio with
Corresponding relation between focal length；For example, the corresponding relation between object distance and ratio and focal length can be represented with table 1：
Table 1
As shown in table 1, object distance S1, S2 and S3 has its corresponding ratio respectively, and different ratio correspond to different Jiao
Away from；Mobile phone is getting the face contour size of the object distance of the first object and the first object, and face contour ratio is calculated
Afterwards, the first focal length can be found in table 1 with the object distance according to the first object and face contour ratio.
Step 406：The focal length for adjusting image acquisition units the second object of collection is the first focal length.
Mobile phone is after the object distance according to the first object and face contour size determine the first focal length, by IMAQ list
Member current focus be adjusted to the first focal length, at this moment, image acquisition units can with the first focal length gather the second object, wherein
The first object be the second object preview subject.
For example, as shown in figure 5, when user carries out three people's self-timers using mobile phone, can be shown on mobile phone screen preposition
The current viewfinder image of camera, at this moment, mobile phone can obtain these three who objects in the viewfinder image, then pass through feature
Extraction obtains the face contour of these three who objects；Mobile phone is sentenced after the face contour of these three who objects is extracted
Breaking, the face contour of No. 1 who object be incomplete face contour, and at this moment, mobile phone obtains the face contour of No. 1 who object
Size, while by the object distance of range sensor No. 1 who object of acquisition, such as, the face of No. 1 who object got
Overall size is A, object distance S2, and default face contour size is B, and it is A/B that face contour ratio, which at this moment can be calculated,
If A/B=b1, then, mobile phone can determine that first is burnt to find focal length f4 according to object distance S2 and ratio b1 in table 1
Away from for f4；In the corresponding relation of the object distance of table 1, ratio and focal length, because focal length is that the homologue that pre-establishes can be complete away under
The focal length of the whole default face contour of display, then, mobile phone is in the object distance according to the first object and face contour size and default face
After the ratio of contouring size determines the first focal length, when gathering the second object with the first focal length, what is collected will be second
The full facial profile of object；Therefore, mobile phone by the current focus of front camera after the first focal length f4 is adjusted to, quite
In the wide-angle for changing front camera, now, the face contour of No. 1 who object can be to be intactly presented on preposition shooting
In the viewfinder image of head, its display effect is as shown in fig. 6, so, front camera can be complete to collect the second object
Face-image；Therefore, when carrying out IMAQ using the method for focus adjustment of the present invention, can be taken turns according to the face of the first object
Wide and the first object object distance focuses, so as to reach the purpose for the wide-angle for changing image acquisition units, and then can be square
Just the full facial image of the second object is quickly collected, without user's constantly cell phone or constantly manual
Focus, the degree of intelligence of mobile phone is improved.
The focus adjustment method that the embodiment of the present invention is provided, mobile phone obtain the in the viewfinder image of image acquisition units
One object, and the face contour of the first object is identified, then judge in the face contour of the first object with the presence or absence of incomplete face
Contouring, if incomplete face contour in the face contour of the first object be present, obtain the object distance and first of the first object
The face contour size of object, then, the first focal length is determined according to the object distance of the first object and face contour size, finally adjusted
The focal length that image acquisition units gather the second object is the first focal length；In this way, can with the face contour according to the first object and
The object distance of first object automatically adjusts the focal length of image acquisition units, with change image acquisition units gather the second object when it is wide
Angle, so that incomplete face contour in viewfinder image no longer be present, it can conveniently and efficiently collect the complete of the second object
Face-image, improve degree of intelligence.
Another focus adjustment method provided based on previous embodiment, embodiments of the invention, as shown in fig. 7, the party
Method may comprise steps of：
Step 501：Obtain the first object in the viewfinder image of image acquisition units.
User can show that image acquisition units are current on the screen of mobile phone and find a view when being taken pictures using mobile phone
Image, at this moment, mobile phone obtain the first object in the viewfinder image, and the first object therein is the preview pair of object to be captured
As, such as the preview subject of who object to be captured.
Step 502：Identify the face contour of the first object.
Mobile phone gets the first object in the viewfinder image of image acquisition units, such as the preview pair of who object to be captured
As afterwards, the face contour of first object is identified, for example, entering to the face contour of who object as shown in Figure 5
Row identification.
Step 503：Judge in the face contour of the first object with the presence or absence of incomplete face contour.
After the face contour of the object of handset identity first, the face contour of first object is detected, judging should
With the presence or absence of incomplete face contour in face contour, if it is judged that incomplete face in the face contour of the first object be present
Profile, then step 504 is performed to step 506；If it is judged that incomplete face wheel is not present in the face contour of the first object
Exterior feature, then step 507 is performed to step 511.
Step 504：Obtain the object distance of the first object and the face contour size of the first object.
Step 505：According to the object distance of the first object and face contour size, the first focal length is determined.
Step 506：The focal length for adjusting image acquisition units the second object of collection is the first focal length.
Wherein, step 504 is to the specific implementation procedure of step 506 and the specific implementation procedure phase of step 404 to step 406
Together, here is omitted.
Step 507：The ratio of the first object and viewfinder image is determined, obtains ratio value.
When incomplete face contour is not present in mobile phone in the face contour for judging the first object, determine in viewfinder image
The first object ratio shared in the viewfinder image, obtain ratio value；For example, mobile phone can obtain the people in viewfinder image
The area of thing object, for example be M, and the area of viewfinder image is obtained, for example be N, then, it may be determined that who object and figure of finding a view
The ratio of picture is M/N, that is, obtains ratio value M/N.
Step 508：Judge whether ratio value is less than preset ratio value.
Mobile phone determines the ratio of the first object and viewfinder image, after obtaining ratio value, judges whether the ratio value is small
In preset ratio value；If the ratio value is less than preset ratio value, step 509 is performed；If the ratio value is more than or equal to default
Ratio value, then it is without any processing.
For example, it is M/N that mobile phone, which obtains who object and the ratio value of viewfinder image, and preset ratio value is P, at this moment, if
Mobile phone judges that M/N is less than P, then performs step 509；Otherwise, it is without any processing.
Step 509：The difference between ratio value and preset ratio value is determined, obtains proportional difference.
Step 510：According to proportional difference and difference and the corresponding relation of focal length, the 3rd focal length is determined.
Mobile phone determines the difference between ratio value and preset ratio value, poor according to the ratio after obtaining proportional difference
Value, finds the 3rd focal length from the corresponding relation of difference and focal length.
For example, in actual applications, the corresponding relation of difference and focal length can be as shown in table 2：
| Difference | Focal length |
| Δe1<Δe≤Δe2 | F1 |
| Δe2<Δe≤Δe3 | F2 |
| Δe3<Δe≤Δe4 | F3 |
Table 2
As shown in Table 2, when proportional difference is fallen between Δ e1 and Δ e2, its corresponding focal length is F1, when proportional difference falls
When entering between Δ e2 and Δ e3, its corresponding focal length is F2, and when proportional difference is fallen between Δ e3 and Δ e4, its corresponding focal length is
F3；Assuming that the ratio value that mobile phone obtains is M/N, preset ratio value is P, then can determine that proportional difference Δ e is Δ e=M/N-P,
Then, mobile phone can find corresponding focal length according to Δ e size from table 2, i.e. mobile phone is adjusted according to proportional difference Δ e and imaged
The focal length of head, so that camera, when the focal length after with regulation is taken pictures, who object can occupy pre- in viewfinder image
If ratio；For example the Δ e that mobile phone is determined is more than Δ e1 and is less than Δ e2, then its corresponding focal length can be found from table 2
For F1, that is, it is F1 to determine the 3rd focal length.
Step 511：The focal length for adjusting image acquisition units the second object of collection is the 3rd focal length.
Mobile phone according to the corresponding relation of proportional difference and difference and focal length after the 3rd focal length is determined, by IMAQ
The current focus of unit is adjusted to the 3rd focal length, and at this moment, image acquisition units can be to gather the second object with the 3rd focal length, its
In the first object be the second object preview subject.
For example, as shown in figure 8, after mobile phone gets three who objects from viewfinder image, obtained by feature extraction
To the face contour of the who object, then judge incomplete face contour is not present in the face contour of the who object,
At this moment, mobile phone determines that the ratio value of the who object and viewfinder image is P1, less than preset ratio value P, i.e. as shown in Figure 8
Three who objects it is smaller, now, proportional difference Δ e=P1-P is calculated in mobile phone, the value between Δ e2 and Δ e3,
It is F2 that then mobile phone can find the 3rd focal length from the corresponding relation of difference and focal length as shown in table 2, then by IMAQ
The focus adjustment of unit is F2；In the difference and the corresponding relation of focal length shown in table 2, because of Jiao corresponding to proportional difference Δ e
Away from being that can ensure that who object occupies a certain proportion of focal length in viewfinder image, then, mobile phone adjusts the focal length of camera
Save as after F2, who object ratio value shared in viewfinder image will increase, and its display effect is as shown in Figure 9；In this way,
It can be avoided with ensureing that these three who objects that camera collects can be presented in viewfinder image in certain proportion
Because these three who objects make to shoot the less problem of image come farther out apart from mobile phone camera.
The focus adjustment method that the embodiment of the present invention is provided, obtains the first couple in the viewfinder image of image acquisition units
As, the face contour of the first object is identified, then judges to whether there is incomplete face contour in the face contour of the first object,
When incomplete face contour in the face contour of the first object be present, the object distance of the first object and the face of the first object are obtained
Overall size, then, the first focal length is determined according to the object distance of the first object and face contour size, finally adjust IMAQ list
The focal length of member the second object of collection is the first focal length；When incomplete face contour being not present in the face contour of the first object,
Determine the ratio of the first object and viewfinder image, obtain ratio value, then judge whether ratio value is less than preset ratio value, than
When example value is less than preset ratio value, the difference between ratio value and preset ratio value is determined, obtains proportional difference, then, according to
The corresponding relation of proportional difference and difference and focal length, the 3rd focal length is determined, finally adjust image acquisition units and gather the second object
Focal length be the 3rd focal length；, can be with according to the in this way, when incomplete face contour in the face contour of the first object be present
The object distance of the face contour of one object and the first object automatically adjusts the focal length of image acquisition units, to change image acquisition units
Wide-angle during the second object is gathered, so that incomplete face contour in viewfinder image no longer be present, can conveniently and efficiently be adopted
Collect the full facial image of the second object；Meanwhile when incomplete face contour being not present in the face contour of the first object,
The focal length of image acquisition units can also be adjusted according to the first object and the ratio value of viewfinder image, so that the second object can
It is presented in certain proportion in viewfinder image, and then the second object is gathered with the ratio, avoids because of the second object distance figure
As collecting unit makes the less problem of the second object collected farther out.
Based on previous embodiment, embodiments of the invention provide a kind of focus adjustment equipment 6, and the focus adjustment equipment 6 can
So that applied in a kind of focus adjustment method of embodiment offer corresponding to Fig. 3,4 or 7, as shown in Figure 10, the focus adjustment is set
It is standby to include：Processor 61, memory 62 and communication bus 63；
Communication bus 63, for realizing the connection communication between processor 61 and memory 62；
Processor 61 is used to perform the focus adjustment program stored in memory 62, to realize following steps：
Obtain the first object in the viewfinder image of image acquisition units；
Judge whether include default feature in the characteristic information of the first object；
If not including default feature in the characteristic information of the first object, the first focal length is determined according to preset rules；
The focal length for adjusting image acquisition units the second object of collection is the first focal length, wherein, the first object is the second object
Preview subject.
Further, processor 61 is used to perform the focus adjustment program stored in memory 62, following to implement
Step：
Identify the face contour of the first object；
Judge in the face contour of the first object with the presence or absence of incomplete face contour；
If incomplete face contour in the face contour of the first object be present, in the characteristic information for judging the first object
Default feature is not included.
Further, processor 61 is used to perform the focus adjustment program stored in memory 62, following to implement
Step：
Obtain the object distance of the first object；
Obtain the face contour size of the first object；
According to the object distance of the first object and face contour size, the first focal length is determined.
Further, processor 61 is used to perform the focus adjustment program stored in memory 62, following to implement
Step：
The size of the face contour of the first object and the ratio of default face contour size are calculated, obtains face contour ratio
Value；
Obtain the corresponding relation between object distance and ratio and focal length；
Object distance and face contour ratio based on the first object, look into the corresponding relation between object distance and ratio and focal length
Look for the first focal length.
Further, processor 61 is additionally operable to perform the focus adjustment program stored in memory 62, to realize following walk
Suddenly：
If the characteristic information of the first object includes default feature, the ratio of the first object and viewfinder image is determined, is obtained
Ratio value；
Judge whether ratio value is less than preset ratio value；
If ratio value is less than preset ratio value, the difference between ratio value and preset ratio value is determined, obtains proportional difference；
According to proportional difference and difference and the corresponding relation of focal length, the 3rd focal length is determined；
The focal length for adjusting image acquisition units the second object of collection is the 3rd focal length.
The equipment of the present embodiment, can be used for performing it is above-mentioned shown in embodiment of the method technical scheme, its realization principle and
Technique effect is similar, and here is omitted.
In actual applications, processor 61 can be central processing unit (Central Processing Unit, CPU), it is micro-
Processor (Micro Processor Unit, MPU), digital signal processor (Digital Signal Processor, DSP)
Or field programmable gate array (Field Programmable Gate Array, FPGA) etc.；Memory 62 can be by any class
The volatibility or non-volatile memory device or combinations thereof of type realizes, wherein, nonvolatile memory can be only
Read memory (Read Only Memory, ROM), programmable read only memory (Programmable Read-Only
Memory, PROM), Erasable Programmable Read Only Memory EPROM (Erasable Programmable Read-Only Memory,
EPROM) etc., volatile memory can be random access memory (Random Access Memory, RAM) etc..
Based on previous embodiment, the present embodiment provides a kind of computer-readable recording medium, computer-readable recording medium
One or more focus adjustment program is stored with, one or more focus adjustment program can be by one or more processor
Perform, to realize following steps：
Obtain the first object in the viewfinder image of image acquisition units；
Judge whether include default feature in the characteristic information of the first object；
If not including default feature in the characteristic information of the first object, the first focal length is determined according to preset rules；
The focal length for adjusting image acquisition units the second object of collection is the first focal length, wherein, the first object is the second object
Preview subject.
Further, judge whether include default feature in the characteristic information of the first object, comprise the following steps:
Identify the face contour of the first object；
Judge in the face contour of the first object with the presence or absence of incomplete face contour；
If incomplete face contour in the face contour of the first object be present, in the characteristic information for judging the first object
Default feature is not included.
Further, the first focal length is determined according to preset rules, comprised the following steps：
Obtain the object distance of the first object；
Obtain the face contour size of the first object；
According to the object distance of the first object and face contour size, the first focal length is determined.
Further, according to the object distance of the first object and face contour size, the first focal length is determined, is comprised the following steps：
The size of the face contour of the first object and the ratio of default face contour size are calculated, obtains face contour ratio
Value；
Obtain the corresponding relation between object distance and ratio and focal length；
Object distance and face contour ratio based on the first object, look into the corresponding relation between object distance and ratio and focal length
Look for the first focal length.
Further, judge after whether including default feature in the characteristic information of the first object, it is further comprising the steps of：
If the characteristic information of the first object includes default feature, the ratio of the first object and viewfinder image is determined, is obtained
Ratio value；
Judge whether ratio value is less than preset ratio value；
If ratio value is less than preset ratio value, the difference between ratio value and preset ratio value is determined, obtains proportional difference；
According to proportional difference and difference and the corresponding relation of focal length, the 3rd focal length is determined；
The focal length for adjusting image acquisition units the second object of collection is the 3rd focal length.
It should be noted that herein, term " comprising ", "comprising" or its any other variant are intended to non-row
His property includes, so that process, method, article or device including a series of elements not only include those key elements, and
And also include the other element being not expressly set out, or also include for this process, method, article or device institute inherently
Key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that including this
Other identical element also be present in the process of key element, method, article or device.
The embodiments of the present invention are for illustration only, do not represent the quality of embodiment.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can add the mode of required general hardware platform to realize by software, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on such understanding, technical scheme is substantially done to prior art in other words
Going out the part of contribution can be embodied in the form of software product, and the computer software product is stored in a storage medium
In (such as ROM/RAM, magnetic disc, CD), including some instructions to cause a station terminal (can be mobile phone, computer, service
Device, air conditioner, or network equipment etc.) perform method described in each embodiment of the present invention.
Embodiments of the invention are described above in conjunction with accompanying drawing, but the invention is not limited in above-mentioned specific
Embodiment, above-mentioned embodiment is only schematical, rather than restricted, one of ordinary skill in the art
Under the enlightenment of the present invention, in the case of present inventive concept and scope of the claimed protection is not departed from, it can also make a lot
Form, these are belonged within the protection of the present invention.
Claims (10)
- A kind of 1. focus adjustment method, it is characterised in that methods described includes：Obtain the first object in the viewfinder image of image acquisition units；Judge whether include default feature in the characteristic information of first object；If not including the default feature in the characteristic information of first object, the first focal length is determined according to preset rules；The focal length for adjusting described image collecting unit the second object of collection is first focal length, wherein, first object is The preview subject of second object.
- 2. according to the method for claim 1, it is characterised in that in the characteristic information for judging first object whether Including presetting feature, including:Identify the face contour of first object；Judge in the face contour of first object with the presence or absence of incomplete face contour；If incomplete face contour in the face contour of first object be present, the feature letter of first object is judged Do not include the default feature in breath.
- 3. according to the method for claim 2, it is characterised in that it is described to determine the first focal length according to preset rules, including：Obtain the object distance of first object；Obtain the face contour size of first object；According to the object distance of first object and the face contour size, first focal length is determined.
- 4. according to the method for claim 3, it is characterised in that the object distance according to first object and the face Overall size, first focal length is determined, including：The face contour size of first object and the ratio of default face contour size are calculated, obtains face contour ratio；Obtain the corresponding relation between object distance and ratio and focal length；Object distance and the face contour ratio based on first object, it is corresponding between the object distance and ratio and focal length First focal length is searched in relation.
- 5. according to the method for claim 1, it is characterised in that in the characteristic information for judging first object whether After default feature, in addition to：If the characteristic information of first object includes the default feature, first object and the viewfinder image are determined Ratio, obtain ratio value；Judge whether the ratio value is less than the preset ratio value；If the ratio value is less than the preset ratio value, the difference between the ratio value and the preset ratio value is determined, Obtain proportional difference；According to the proportional difference and difference and the corresponding relation of focal length, the 3rd focal length is determined；The focal length for adjusting described image collecting unit collection second object is the 3rd focal length.
- 6. a kind of focus adjustment equipment, it is characterised in that the focus adjustment equipment includes：Processor, memory and communication are total Line；The communication bus, for realizing the connection communication between the processor and the memory；The processor, for performing the focus adjustment program stored in the memory, to realize following steps：Obtain the first object in the viewfinder image of image acquisition units；Judge whether include default feature in the characteristic information of first object；If not including the default feature in the characteristic information of first object, the first focal length is determined according to preset rules；The focal length for adjusting described image collecting unit the second object of collection is first focal length, wherein, first object is The preview subject of second object.
- 7. focus adjustment equipment according to claim 6, it is characterised in that the processor is used to perform the memory The focus adjustment program of middle storage, to implement following steps：Identify the face contour of first object；Judge in the face contour of first object with the presence or absence of incomplete face contour；If incomplete face contour in the face contour of first object be present, the feature letter of first object is judged Do not include the default feature in breath.
- 8. focus adjustment equipment according to claim 7, it is characterised in that the processor is used to perform the memory The focus adjustment program of middle storage, to implement following steps：Obtain the object distance of first object；Obtain the face contour size of first object；According to the object distance of first object and the face contour size, first focal length is determined.
- 9. focus adjustment equipment according to claim 6, it is characterised in that the processor is additionally operable to perform the storage The focus adjustment program stored in device, to realize following steps：If the characteristic information of first object includes the default feature, first object and the viewfinder image are determined Ratio, obtain ratio value；Judge whether the ratio value is less than the preset ratio value；If the ratio value is less than the preset ratio value, the difference between the ratio value and the preset ratio value is determined, Obtain proportional difference；According to the proportional difference and difference and the corresponding relation of focal length, the 3rd focal length is determined；The focal length for adjusting described image collecting unit collection second object is the 3rd focal length.
- A kind of 10. computer-readable recording medium, it is characterised in that the computer-readable recording medium storage have one or Multiple focus adjustment programs, one or more of focus adjustment programs can be by one or more computing devices, with reality Now as described in any one of claim 1 to 5 the step of focus adjustment method.
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