CN107124556A - Focusing method, device, computer-readable recording medium and mobile terminal - Google Patents
Focusing method, device, computer-readable recording medium and mobile terminal Download PDFInfo
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- CN107124556A CN107124556A CN201710400637.3A CN201710400637A CN107124556A CN 107124556 A CN107124556 A CN 107124556A CN 201710400637 A CN201710400637 A CN 201710400637A CN 107124556 A CN107124556 A CN 107124556A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/67—Focus control based on electronic image sensor signals
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Abstract
The present invention relates to a kind of focusing method, device, computer-readable recording medium and mobile terminal.The above method includes：After frame stabilization, the focusing area in the picture is obtained；Detect and whether there is region of variation in the picture；If detecting and there is region of variation in the picture, position and the movement locus of the region of variation are obtained；The focusing area is adjusted according to the position of the region of variation and movement locus.The above method, can be with the focusing area in adjust automatically picture.
Description
Technical field
The present invention relates to field of computer technology, more particularly to a kind of focusing method, device, computer-readable storage medium
Matter and mobile terminal.
Background technology
Focusing refers to adjust object distance and position apart by Focusing mechanism so that image objects clearly process.Clapping
During taking the photograph, according to the focus set to image, focusing area can be obtained.The mode of focusing is varied, including right manually
Burnt and auto-focusing, auto-focusing includes laser focusing, phase focusing and contrast focusing etc..By focusing, it can not only cause
Imaging clearly, main body in image can also be highlighted.
The content of the invention
The embodiment of the present invention provides a kind of focusing method, device, computer-readable recording medium and mobile terminal, can be certainly
Focusing area in dynamic adjustment shooting picture.
A kind of focusing method, including：
After frame stabilization, the focusing area in the picture is obtained；
Detect and whether there is region of variation in the picture；
If detecting and there is region of variation in the picture, position and the movement locus of the region of variation are obtained；
The focusing area is adjusted according to the position of the region of variation and movement locus.
In one of the embodiments, it is described that the focusing area is adjusted according to the position of the region of variation and movement locus
Domain includes：
Whether needed to adjust the focusing area according to the position judgment of the region of variation；
If desired the focusing area is adjusted, line translates the focusing area on the basis of the movement locus.
In one of the embodiments, it is described that the focusing area is adjusted according to the position of the region of variation and movement locus
Domain includes：
Whether detect the region of variation is body region in the picture；
If the region of variation is body region, the distance between the region of variation and described focusing area are obtained；
If the distance is in first threshold, need to adjust the focusing area.
In one of the embodiments, it is described that the focusing area is adjusted according to the position of the region of variation and movement locus
Before domain, methods described also includes：
Detect whether the picture is stablized；
If detecting the frame stabilization, the focusing area is adjusted according to the position of the region of variation and movement locus
Domain.
In one of the embodiments, methods described also includes：
Shooting instruction whether is received in preset duration, detects again and whether there is region of variation in the picture；
If detecting again in the picture and there is region of variation, according to the position of the region of variation detected again and fortune
Dynamic rail mark adjusts the focusing area.
A kind of focusing mechanism, including：
First acquisition module, for after frame stabilization, obtaining the focusing area in the picture；
Detection module, region of variation is whether there is for detecting in the picture；
Second acquisition module, if there is region of variation in the picture for detecting, obtains the position of the region of variation
Put and movement locus；
Adjusting module, the focusing area is adjusted for the position according to the region of variation and movement locus.
In one of the embodiments, the detection module is additionally operable in the position according to the region of variation and motion rail
Mark is adjusted before the focusing area, detects whether the picture is stablized；
If the adjusting module is additionally operable to detect the frame stabilization, according to the position of the region of variation and motion
Track adjusts the focusing area.
In one of the embodiments, described device also includes：
The detection module is additionally operable in preset duration whether receive shooting instruction, and detecting again in the picture is
It is no to there is region of variation；
If the adjusting module, which is additionally operable to detect again in the picture, has region of variation, according to what is detected again
The position of region of variation and movement locus adjust the focusing area.
A kind of computer-readable recording medium, is stored thereon with computer program, and the program is realized when being executed by processor
Focusing method described in any of the above.
A kind of mobile terminal, including memory, processor and storage are on a memory and the meter that can run on a processor
Calculation machine program, realizes the focusing method described in any of the above during the computing device described program.
Brief description of the drawings
Fig. 1 is the flow chart of focusing method in one embodiment；
Fig. 2 is the flow chart of focusing method in another embodiment；
Fig. 3 is the structured flowchart of focusing mechanism in one embodiment；
Fig. 4 is the block diagram of the part-structure of the mobile phone related to mobile terminal provided in an embodiment of the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
It is appreciated that term " first " used in the present invention, " second " etc. can be used to describe various elements herein,
But these elements should not be limited by these terms.These terms are only used for distinguishing first element and another element.Citing comes
Say, without departing from the scope of the invention, the first acquisition module can be referred to as the second acquisition module, and similarly,
Second acquisition module can be referred to as the first acquisition module.First acquisition module and the second acquisition module both acquisition module,
But it is not same acquisition module.
Fig. 1 is the flow chart of focusing method in one embodiment.As shown in figure 1, a kind of focusing method, including step S102
To step S108.Wherein：
S102, after frame stabilization, obtains the focusing area in picture.
Mobile terminal is after photographing program is enabled, if detecting the frame stabilization of acquisition, obtains the focusing area in picture.
Wherein, mobile terminal can detect the motion state of mobile terminal by obtaining the data of the corresponding gyroscope of present frame picture,
Whether focusing ROI (Region Of Interest, area-of-interest) brightness value can detect picture main body in present frame picture
Backlight.Mobile terminal can determine that by the motion state of the corresponding mobile terminal of successive frame picture and the backlight situation of picture main body
Whether the picture of acquisition is stablized.If the value of the data of gyroscope is in first threshold in the corresponding mobile terminal of successive frame picture,
Focus ROI brightness SAD (Sum Of Absolute Differences, absolute value sum) changing value in Second Threshold,
Then judge the frame stabilization of acquisition for mobile terminal.Wherein, the frame number of mobile terminal detection successive frame picture is predeterminable, mobile terminal
The picture of respective frame is obtained according to the frame number of default successive frame and detects whether picture is stablized.Focusing can be wrapped in mobile terminal
Include various ways, such as laser focusing, phase focusing and contrast focusing.Can obtaining imaging by focusing, most clearly point is Jiao
Point, the region of imaging clearly is focusing area in image centered on focus.
It whether there is region of variation in S104, detection picture.
After mobile terminal detects frame stabilization, enable in motion detection algorithm detection picture and whether there is variation zone
Domain.Wherein, region of variation refers to the region of the part change in frame stabilization.For example, the picture of acquisition for mobile terminal is one
Portrait, when mobile terminal detects the frame stabilization of acquisition, is enabled in motion detection algorithm detection picture with the presence or absence of change
In region, such as picture during the arm motion of portrait, motion detection algorithm detects the region of part change, that is, judges arm motion
Region be region of variation.
Conventional motion detection algorithm include frame difference method, symmetrical frame difference method, average algorithm, single Gaussian Background model algorithm,
Mixed Gauss model algorithm etc..Frame difference method includes：After frame stabilization, one two field picture of selection is background image, then will enable fortune
The each two field picture obtained after dynamic detection algorithm carries out mathematic interpolation with background image, and obtains error image, passes through differential chart
It whether there is region of variation in picture as the value of upper pixel can determine that.When the image of acquisition is consistent with background image, pass through
The value of pixel is that 0, i.e. error image are pure black image in the error image that mathematic interpolation is obtained；When pixel in error image
Value not be 0 when, that is, the image obtained has differences with background image, by error image not be 0 pixel number
It can determine that with distribution and whether there is region of variation in picture.For example, in error image for 0 pixel value number exceed specify
The number continuously arranged of pixel in value and/or error image for 0 exceedes designated value, that is, judges there is variation zone in picture
Domain.Wherein, choose background image when, can choose detection frame stabilization when successive frame picture in any two field picture as Background
Last frame image is used as background image in successive frame picture during picture, such as frame stabilization.
, there is region of variation in S106, obtain position and the movement locus of region of variation if detecting in picture.
The position of region of variation includes body region and background area.When mobile terminal enables photographing program, getting
After the focusing area of picture, it can be detected using algorithm of region growing in the body region of frame out, picture in addition to body region
Region is background area.For example, mobile terminal is after photographing program is enabled, the picture of acquisition is portrait, is acted on by acquisition
The belly region of the focusing area set in the touch control operation of moving boundary, such as portrait, after focusing area is got, passes through
Region-growing method detects body region, sends out the master for detecting frame out by Area generation such as by starting point of the belly region of portrait
Body region is portrait.Part in picture in addition to body region is background area.The movement locus of region of variation can pass through fortune
Dynamic detection algorithm is obtained.Motion detection algorithm detection movement locus mainly includes template tracing detection, base based on target area
Tracing detection in characteristic point, the tracing detection based on active contour and tracing detection based on model etc..Wherein, different fortune
The precision of movement locus acquired in dynamic detection algorithm is different.
S108, focusing area is adjusted according to the position of region of variation and movement locus.
After it there is region of variation in detecting picture, the position of acquisition region of variation and motion track information, and according to
The position of region of variation and motion track information adjustment focusing area.Wherein, the position of region of variation includes body region and the back of the body
Scene area, the position of region of variation is different, and the mode of operation that mobile terminal is performed is different.For example, region of variation is main in picture
Body region, because body region is the region that focusing area is formed by algorithm of region growing, then needs correspondence adjustment focusing area；
When region of variation is background area in picture, then without focusing area in adjustment picture.
Focusing method in the embodiment of the present invention, region of variation in picture is detected by motion detection algorithm, and according to change
Focusing area in adjustment picture is carried out in region, can realize in the middle part of picture when split screen changes that focusing area is with true in adjustment picture
Protect imaging clearly.
In one embodiment, included according to the position of region of variation and movement locus adjustment focusing area：According to change
Whether the position judgment in region needs to adjust focusing area；If desired focusing area is adjusted, line is translated on the basis of movement locus
Focusing area.
, can be by the position judgment of region of variation after being detected according to motion detection algorithm and there is region of variation in frame out
Whether focusing area in adjustment picture is needed.If necessary to the focusing area in adjustment picture, then according to the variation zone of acquisition
The movement locus in domain translates focusing area.Wherein, translation focusing area refers to, the line on the basis of the movement locus of region of variation
Translate focus in focusing area so that the movement locus of focus is parallel with the movement locus of region of variation and equal length.Another
In one embodiment, after the movement locus of region of variation is obtained, the Origin And Destination of the movement locus of region of variation is obtained, is put down
The focus for moving focusing area make it that the Origin And Destination of focus connects the line segment to be formed and the Origin And Destination of movement locus is connected
The line segment of formation is parallel and equal length.
In one embodiment, included according to the position of region of variation and movement locus adjustment focusing area：Detection change
Whether region is body region in picture；If region of variation is body region, obtain between region of variation and focusing area away from
From；If distance is in first threshold, need to adjust focusing area.
Mobile terminal, which is detected in picture, to be present after region of variation, body region in judging region of variation whether as picture.
When region of variation is body region in picture, the distance value of focus in the point and focusing area on region of variation, inspection are obtained
Survey the distance value of focus in the point on region of variation and focusing area.Wherein, distance value can be represented by the number of pixel.It is logical
The distance value of focus in point and focusing area on region of variation is crossed, above-mentioned distance value is judged whether in default value range,
If in default value range, needing to adjust focusing area.When region of variation is nearer apart from focusing area, region of variation pair
The influence of focusing area is bigger, then needs the distance between adjustment focusing area.In another embodiment, change is being detected
Region is that in picture after body region, also can detect body region is mass motion or componental movement, if detecting body region
Domain mass motion, then adjust focusing area according to movement locus；If body region componental movement is detected, according to moving region
Judge whether to need to adjust focusing area with the distance between focusing area.
In one embodiment, before according to the position of region of variation and movement locus adjustment focusing area, method is also wrapped
Include：Whether detection picture is stablized；If detecting frame stabilization, according to the position of region of variation and movement locus adjustment focusing area
Domain.
In adjustment picture before focusing area, mobile terminal also needs whether detection picture is stablized, if it is steady to detect picture
Fixed, position and movement locus further according to region of variation adjust focusing area.I.e. in adjustment picture before focusing area, move
Dynamic terminal need to detect in picture region of variation whether stop motion, when region of variation stop motion in picture, then adjustment picture
In focusing area.
Focusing method in the embodiment of the present invention, after it there is region of variation in detecting picture, whether detection picture in real time
It is stable, if detecting frame stabilization, that is, it is determined as in picture that region of variation motion terminates, then focusing area in adjustment picture, with
Ensure body region imaging clearly in picture.
In one embodiment, method also includes：Shooting instruction whether is received in preset duration, picture is detected again
In whether there is region of variation；If detecting there is region of variation in picture again, according to the region of variation detected again
Position and movement locus adjustment focusing area.
Mobile terminal is after adjustment focusing area, and whether detection receives shooting instruction in preset duration, if receiving
Instruction is shot, then is shot；If not receiving shooting instruction, detect in picture whether deposit again using motion detection algorithm
In region of variation, after region of variation is detected, focusing area is adjusted according to the position of region of variation and movement locus.That is basis
Focusing area in the real-time adjustment picture of the motion conditions of object in picture, to ensure main body imaging clearly in picture.
Focusing method in the embodiment of the present invention, after adjustment focusing area, whether detection receives in default duration
The instruction of photo is shot, shooting instruction is received and is then shot, shooting instruction is not received and is then continued in dynamic detection picture
With the presence or absence of moving region, and according to focusing area in the motion conditions adjustment picture of moving region, make picture imaging clearly.
Fig. 2 is the flow chart of focusing method in another embodiment.As shown in Fig. 2 a kind of focusing method, including：
S202, starts photographing program.Mobile terminal starts photographing program and detected after frame stabilization, into step
S204。
Whether S204, motion detection algorithm detects the object of motion.Using motion detection algorithm detection picture in whether
There is subregion motion.If so, into step S206；If it is not, into step S212.
S206, if need to be tracked focusing to the object of motion.Believed according to the position of region of variation and variation track
Whether breath detection needs to be tracked focusing to the object of motion.If so, into step S208；If it is not, into step S212.
S208, focusing is tracked to the object of motion.After motion stopping is detected, according to the motion of the object of motion
Track adjusts focusing area.
S210, judges whether that focusing is completed.After frame stabilization and adjustment focusing area, that is, judge that focusing is completed.If so,
Into step S212；If it is not, return to step S208.
S212, receives and shoots instruction and shot.
Focusing method in the embodiment of the present invention, can adjust focusing area in picture in the case of the object of which movement of part,
So that picture imaging clearly.
Fig. 3 is the structured flowchart of focusing mechanism in one embodiment.As shown in figure 3, a kind of focusing mechanism, including first obtains
Modulus block 302, detection module 304, the second acquisition module 306 and adjusting module 308.
First acquisition module 302, for after frame stabilization, obtaining the focusing area in picture；
Detection module 304, region of variation is whether there is for detecting in picture；
Second acquisition module 306, if there is region of variation in picture for detecting, obtains position and the fortune of region of variation
Dynamic rail mark；
Adjusting module 308, for the position according to region of variation and movement locus adjustment focusing area.
In one embodiment, included according to the position of region of variation and movement locus adjustment focusing area：According to change
Whether the position judgment in region needs to adjust focusing area；If desired focusing area is adjusted, line is translated on the basis of movement locus
Focusing area.
In one embodiment, included according to the position of region of variation and movement locus adjustment focusing area：Detection change
Whether region is body region in picture；If region of variation is body region, obtain between region of variation and focusing area away from
From；If distance is in first threshold, need to adjust focusing area.
In one embodiment, detection module 304 is additionally operable in the position according to region of variation and movement locus adjustment pair
Before burnt region, whether detection picture is stablized；If adjusting module 308 is additionally operable to detect frame stabilization, according to region of variation
Position and movement locus adjustment focusing area.
In one embodiment, detection module 304 is additionally operable in preset duration whether receive shooting instruction, examines again
Survey and whether there is region of variation in picture；If adjusting module 308, which is additionally operable to detect again, has region of variation in picture, according to
The position of the region of variation detected again and movement locus adjustment focusing area.
The division of modules is only used for for example, in other embodiments, can fill focusing in above-mentioned focusing mechanism
Put and be divided into different modules as required, to complete all or part of function of above-mentioned focusing mechanism.
The embodiment of the present invention additionally provides a kind of computer-readable recording medium.A kind of computer-readable recording medium, its
On be stored with computer program, the program realizes following steps when being executed by processor：
(1) after frame stabilization, the focusing area in picture is obtained.
Mobile terminal is after photographing program is enabled, if detecting the frame stabilization of acquisition, obtains the focusing area in picture.
Wherein, mobile terminal can detect the motion state of mobile terminal by obtaining the data of the corresponding gyroscope of present frame picture,
Whether focusing ROI (Region Of Interest, area-of-interest) brightness value can detect picture main body in present frame picture
Backlight.Mobile terminal can determine that by the motion state of the corresponding mobile terminal of successive frame picture and the backlight situation of picture main body
Whether the picture of acquisition is stablized.If the value of the data of gyroscope is in first threshold in the corresponding mobile terminal of successive frame picture,
Focus ROI brightness SAD (Sum Of Absolute Differences, absolute value sum) changing value in Second Threshold,
Then judge the frame stabilization of acquisition for mobile terminal.Wherein, the frame number of mobile terminal detection successive frame picture is predeterminable, mobile terminal
The picture of respective frame is obtained according to the frame number of default successive frame and detects whether picture is stablized.Focusing can be wrapped in mobile terminal
Include various ways, such as laser focusing, phase focusing and contrast focusing.Can obtaining imaging by focusing, most clearly point is Jiao
Point, the region of imaging clearly is focusing area in image centered on focus.
(2) it whether there is region of variation in detection picture.
After mobile terminal detects frame stabilization, enable in motion detection algorithm detection picture and whether there is variation zone
Domain.Wherein, region of variation refers to the region of the part change in frame stabilization.For example, the picture of acquisition for mobile terminal is one
Portrait, when mobile terminal detects the frame stabilization of acquisition, is enabled in motion detection algorithm detection picture with the presence or absence of change
In region, such as picture during the arm motion of portrait, motion detection algorithm detects the region of part change, that is, judges arm motion
Region be region of variation.
Conventional motion detection algorithm include frame difference method, symmetrical frame difference method, average algorithm, single Gaussian Background model algorithm,
Mixed Gauss model algorithm etc..Frame difference method includes：After frame stabilization, one two field picture of selection is background image, then will enable fortune
The each two field picture obtained after dynamic detection algorithm carries out mathematic interpolation with background image, and obtains error image, passes through differential chart
It whether there is region of variation in picture as the value of upper pixel can determine that.When the image of acquisition is consistent with background image, pass through
The value of pixel is that 0, i.e. error image are pure black image in the error image that mathematic interpolation is obtained；When pixel in error image
Value not be 0 when, that is, the image obtained has differences with background image, by error image not be 0 pixel number
It can determine that with distribution and whether there is region of variation in picture.For example, in error image for 0 pixel value number exceed specify
The number continuously arranged of pixel in value and/or error image for 0 exceedes designated value, that is, judges there is variation zone in picture
Domain.Wherein, choose background image when, can choose detection frame stabilization when successive frame picture in any two field picture as Background
Last frame image is used as background image in successive frame picture during picture, such as frame stabilization.
(3) there is region of variation in picture if detecting, obtain position and the movement locus of region of variation.
The position of region of variation includes body region and background area.When mobile terminal enables photographing program, getting
After the focusing area of picture, it can be detected using algorithm of region growing in the body region of frame out, picture in addition to body region
Region is background area.For example, mobile terminal is after photographing program is enabled, the picture of acquisition is portrait, is acted on by acquisition
The belly region of the focusing area set in the touch control operation of moving boundary, such as portrait, after focusing area is got, passes through
Region-growing method detects body region, sends out the master for detecting frame out by Area generation such as by starting point of the belly region of portrait
Body region is portrait.Part in picture in addition to body region is background area.The movement locus of region of variation can pass through fortune
Dynamic detection algorithm is obtained.Motion detection algorithm detection movement locus mainly includes template tracing detection, base based on target area
Tracing detection in characteristic point, the tracing detection based on active contour and tracing detection based on model etc..Wherein, different fortune
The precision of movement locus acquired in dynamic detection algorithm is different.
(4) focusing area is adjusted according to the position of region of variation and movement locus.
After it there is region of variation in detecting picture, the position of acquisition region of variation and motion track information, and according to
The position of region of variation and motion track information adjustment focusing area.Wherein, the position of region of variation includes body region and the back of the body
Scene area, the position of region of variation is different, and the mode of operation that mobile terminal is performed is different.For example, region of variation is main in picture
Body region, because body region is the region that focusing area is formed by algorithm of region growing, then needs correspondence adjustment focusing area；
When region of variation is background area in picture, then without focusing area in adjustment picture.
In one embodiment, included according to the position of region of variation and movement locus adjustment focusing area：According to change
Whether the position judgment in region needs to adjust focusing area；If desired focusing area is adjusted, line is translated on the basis of movement locus
Focusing area.
, can be by the position judgment of region of variation after being detected according to motion detection algorithm and there is region of variation in frame out
Whether focusing area in adjustment picture is needed.If necessary to the focusing area in adjustment picture, then according to the variation zone of acquisition
The movement locus in domain translates focusing area.Wherein, translation focusing area refers to, the line on the basis of the movement locus of region of variation
Translate focus in focusing area so that the movement locus of focus is parallel with the movement locus of region of variation and equal length.Another
In one embodiment, after the movement locus of region of variation is obtained, the Origin And Destination of the movement locus of region of variation is obtained, is put down
The focus for moving focusing area make it that the Origin And Destination of focus connects the line segment to be formed and the Origin And Destination of movement locus is connected
The line segment of formation is parallel and equal length.
In one embodiment, included according to the position of region of variation and movement locus adjustment focusing area：Detection change
Whether region is body region in picture；If region of variation is body region, obtain between region of variation and focusing area away from
From；If distance is in first threshold, need to adjust focusing area.
Mobile terminal, which is detected in picture, to be present after region of variation, body region in judging region of variation whether as picture.
When region of variation is body region in picture, the distance value of focus in the point and focusing area on region of variation, inspection are obtained
Survey the distance value of focus in the point on region of variation and focusing area.Wherein, distance value can be represented by the number of pixel.It is logical
The distance value of focus in point and focusing area on region of variation is crossed, above-mentioned distance value is judged whether in default value range,
If in default value range, needing to adjust focusing area.When region of variation is nearer apart from focusing area, region of variation pair
The influence of focusing area is bigger, then needs the distance between adjustment focusing area.In another embodiment, change is being detected
Region is that in picture after body region, also can detect body region is mass motion or componental movement, if detecting body region
Domain mass motion, then adjust focusing area according to movement locus；If body region componental movement is detected, according to moving region
Judge whether to need to adjust focusing area with the distance between focusing area.
In one embodiment, before according to the position of region of variation and movement locus adjustment focusing area, method is also wrapped
Include：Whether detection picture is stablized；If detecting frame stabilization, according to the position of region of variation and movement locus adjustment focusing area
Domain.
In adjustment picture before focusing area, mobile terminal also needs whether detection picture is stablized, if it is steady to detect picture
Fixed, position and movement locus further according to region of variation adjust focusing area.I.e. in adjustment picture before focusing area, move
Dynamic terminal need to detect in picture region of variation whether stop motion, when region of variation stop motion in picture, then adjustment picture
In focusing area.
In one embodiment, shooting instruction whether is received in preset duration, detects and whether there is in picture again
Region of variation；If detecting there is region of variation in picture again, according to the position of the region of variation detected again and motion
Track adjusts focusing area.
Mobile terminal is after adjustment focusing area, and whether detection receives shooting instruction in preset duration, if receiving
Instruction is shot, then is shot；If not receiving shooting instruction, detect in picture whether deposit again using motion detection algorithm
In region of variation, after region of variation is detected, focusing area is adjusted according to the position of region of variation and movement locus.That is basis
Focusing area in the real-time adjustment picture of the motion conditions of object in picture, to ensure main body imaging clearly in picture.
The embodiment of the present invention additionally provides a kind of mobile terminal.As shown in figure 4, for convenience of description, illustrate only and this
The related part of inventive embodiments, particular technique details is not disclosed, refer to present invention method part.The movement is whole
End can be to include mobile phone, tablet personal computer, PDA (Personal Digital Assistant, personal digital assistant), POS
Any terminal device such as (Point of Sales, point-of-sale terminal), vehicle-mounted computer, Wearable, using mobile terminal as mobile phone
Exemplified by：
Fig. 4 is the block diagram of the part-structure of the mobile phone related to mobile terminal provided in an embodiment of the present invention.With reference to Fig. 4,
Mobile phone includes：Radio frequency (Radio Frequency, RF) circuit 410, memory 420, input block 430, display unit 440, biography
Sensor 450, voicefrequency circuit 460, Wireless Fidelity (wireless fidelity, WiFi) module 470, processor 480, Yi Ji electricity
The grade part of source 490., can be with it will be understood by those skilled in the art that the handset structure shown in Fig. 4 does not constitute the restriction to mobile phone
Including than illustrating more or less parts, either combining some parts or different parts arrangement.
Wherein, RF circuits 410 can be used for receive and send messages or communication process in, the reception and transmission of signal can be by base stations
After downlink information is received, handled to processor 480；Up data can also be sent to base station.Generally, RF circuits include but
Be not limited to antenna, at least one amplifier, transceiver, coupler, low-noise amplifier (Low Noise Amplifier,
LNA), duplexer etc..In addition, RF circuits 410 can also be communicated by radio communication with network and other equipment.Above-mentioned channel radio
Letter can use any communication standard or agreement, including but not limited to global system for mobile communications (Global System of
Mobile communication, GSM), general packet radio service (General Packet Radio Service,
GPRS), CDMA (Code Division Multiple Access, CDMA), WCDMA (Wideband Code
Division Multiple Access, WCDMA), Long Term Evolution (Long Term Evolution, LTE)), Email,
Short Message Service (Short Messaging Service, SMS) etc..
Memory 420 can be used for storage software program and module, and processor 480 is stored in memory 420 by operation
Software program and module, so as to perform various function application and the data processing of mobile phone.Memory 420 can mainly include
Program storage area and data storage area, wherein, the application journey that program storage area can be needed for storage program area, at least one function
Sequence (application program of such as sound-playing function, application program of image player function etc.) etc.；Data storage area can store root
Created data (such as voice data, address list etc.) etc. are used according to mobile phone.In addition, memory 420 can be included at a high speed
Random access memory, can also include nonvolatile memory, for example, at least one disk memory, flush memory device or
Other volatile solid-state parts.
Input block 430 can be used for the numeral or character information for receiving input, and generation and the user of mobile phone 400 to set
And the relevant key signals input of function control.Specifically, input block 430 may include contact panel 431 and other inputs
Equipment 432.Contact panel 431, alternatively referred to as touch-screen, collect touch operation (such as user of the user on or near it
Use the operation of any suitable object such as finger, stylus or annex on contact panel 431 or near contact panel 431),
And corresponding attachment means are driven according to formula set in advance.In one embodiment, contact panel 431 may include to touch inspection
Survey two parts of device and touch controller.Wherein, touch detecting apparatus detects the touch orientation of user, and detects touch operation
The signal brought, transmits a signal to touch controller；Touch controller receives touch information from touch detecting apparatus, and will
It is converted into contact coordinate, then gives processor 480, and the order sent of reception processing device 480 and can be performed.In addition,
Contact panel 431 can be realized using polytypes such as resistance-type, condenser type, infrared ray and surface acoustic waves.Except touch surface
Plate 431, input block 430 can also include other input equipments 432.Specifically, other input equipments 432 can be included but not
It is limited to the one or more in physical keyboard, function key (such as volume control button, switch key etc.) etc..
Display unit 440 can be used for the various of the information that is inputted by user of display or the information for being supplied to user and mobile phone
Menu.Display unit 440 may include display panel 441.In one embodiment, liquid crystal display (Liquid can be used
Crystal Display, LCD), the form such as Organic Light Emitting Diode (Organic Light-Emitting Diode, OLED)
To configure display panel 441.In one embodiment, contact panel 431 can cover display panel 441, when contact panel 431 is examined
Measure after the touch operation on or near it, processor 480 is sent to determine the type of touch event, with preprocessor
480 provide corresponding visual output according to the type of touch event on display panel 441.Although in Fig. 4, contact panel
431 and display panel 441 are input and the input function that mobile phone is realized as two independent parts, but are implemented some
, can be by contact panel 431 and the input that is integrated and realizing mobile phone of display panel 441 and output function in example.
Mobile phone 400 may also include at least one sensor 450, such as optical sensor, motion sensor and other sensings
Device.Specifically, optical sensor may include 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 441, and proximity transducer can close display panel when mobile phone is moved in one's ear
441 and/or backlight.Motion sensor may include acceleration transducer, can detect and adds in all directions by acceleration transducer
The size of speed, can detect that size and the direction of gravity when static, application (the such as horizontal/vertical screen available for identification mobile phone posture
Switching), Vibration identification correlation function (such as pedometer, tap) etc.；In addition, mobile phone can also configure gyroscope, barometer, humidity
Other sensors such as meter, thermometer, infrared ray sensor etc..
Voicefrequency circuit 460, loudspeaker 461 and microphone 462 can provide the COBBAIF between user and mobile phone.Audio-frequency electric
Electric signal after the voice data received conversion can be transferred to loudspeaker 461, sound is converted to by loudspeaker 461 by road 460
Signal output；On the other hand, the voice signal of collection is converted to electric signal by microphone 462, by voicefrequency circuit 460 receive after turn
It is changed to voice data, then after voice data output processor 480 is handled, another mobile phone can be sent to through RF circuits 410, or
Person exports voice data to memory 420 so as to subsequent treatment.
WiFi belongs to short range wireless transmission technology, and mobile phone can help user's transceiver electronicses postal by WiFi module 470
Part, browse webpage and access streaming video etc., it has provided the user wireless broadband internet and accessed.Although Fig. 4 is shown
WiFi module 470, but it is understood that, it is simultaneously not belonging to must be configured into for mobile phone 400, can omit as needed.
Processor 480 is the control centre of mobile phone, using various interfaces and the various pieces of connection whole mobile phone, is led to
Cross operation or perform and be stored in software program and/or module in memory 420, and call and be stored in memory 420
Data, perform the various functions and processing data of mobile phone, so as to carry out integral monitoring to mobile phone.In one embodiment, handle
Device 480 may include one or more processing units.In one embodiment, processor 480 can integrated application processor and modulation
Demodulation processor, wherein, application processor mainly handles operating system, user interface and application program etc.；Modulation /demodulation is handled
Device mainly handles radio communication.It is understood that above-mentioned modem processor can not also be integrated into processor 480.
Mobile phone 400 also includes the power supply 490 (such as battery) powered to all parts, it is preferred that power supply can pass through electricity
Management system and processor 480 are logically contiguous, so as to realize management charging, electric discharge and power consumption by power-supply management system
The functions such as management.
In one embodiment, mobile phone 400 can also include camera, bluetooth module etc..
In embodiments of the present invention, the processor 680 included by the mobile terminal performs the calculating of storage on a memory
Following steps are realized during machine program：
(1) after frame stabilization, the focusing area in picture is obtained.
Mobile terminal is after photographing program is enabled, if detecting the frame stabilization of acquisition, obtains the focusing area in picture.
Wherein, mobile terminal can detect the motion state of mobile terminal by obtaining the data of the corresponding gyroscope of present frame picture,
Whether focusing ROI (Region Of Interest, area-of-interest) brightness value can detect picture main body in present frame picture
Backlight.Mobile terminal can determine that by the motion state of the corresponding mobile terminal of successive frame picture and the backlight situation of picture main body
Whether the picture of acquisition is stablized.If the value of the data of gyroscope is in first threshold in the corresponding mobile terminal of successive frame picture,
Focus ROI brightness SAD (Sum Of Absolute Differences, absolute value sum) changing value in Second Threshold,
Then judge the frame stabilization of acquisition for mobile terminal.Wherein, the frame number of mobile terminal detection successive frame picture is predeterminable, mobile terminal
The picture of respective frame is obtained according to the frame number of default successive frame and detects whether picture is stablized.Focusing can be wrapped in mobile terminal
Include various ways, such as laser focusing, phase focusing and contrast focusing.Can obtaining imaging by focusing, most clearly point is Jiao
Point, the region of imaging clearly is focusing area in image centered on focus.
(2) it whether there is region of variation in detection picture.
After mobile terminal detects frame stabilization, enable in motion detection algorithm detection picture and whether there is variation zone
Domain.Wherein, region of variation refers to the region of the part change in frame stabilization.For example, the picture of acquisition for mobile terminal is one
Portrait, when mobile terminal detects the frame stabilization of acquisition, is enabled in motion detection algorithm detection picture with the presence or absence of change
In region, such as picture during the arm motion of portrait, motion detection algorithm detects the region of part change, that is, judges arm motion
Region be region of variation.
Conventional motion detection algorithm include frame difference method, symmetrical frame difference method, average algorithm, single Gaussian Background model algorithm,
Mixed Gauss model algorithm etc..Frame difference method includes：After frame stabilization, one two field picture of selection is background image, then will enable fortune
The each two field picture obtained after dynamic detection algorithm carries out mathematic interpolation with background image, and obtains error image, passes through differential chart
It whether there is region of variation in picture as the value of upper pixel can determine that.When the image of acquisition is consistent with background image, pass through
The value of pixel is that 0, i.e. error image are pure black image in the error image that mathematic interpolation is obtained；When pixel in error image
Value not be 0 when, that is, the image obtained has differences with background image, by error image not be 0 pixel number
It can determine that with distribution and whether there is region of variation in picture.For example, in error image for 0 pixel value number exceed specify
The number continuously arranged of pixel in value and/or error image for 0 exceedes designated value, that is, judges there is variation zone in picture
Domain.Wherein, choose background image when, can choose detection frame stabilization when successive frame picture in any two field picture as Background
Last frame image is used as background image in successive frame picture during picture, such as frame stabilization.
(3) there is region of variation in picture if detecting, obtain position and the movement locus of region of variation.
The position of region of variation includes body region and background area.When mobile terminal enables photographing program, getting
After the focusing area of picture, it can be detected using algorithm of region growing in the body region of frame out, picture in addition to body region
Region is background area.For example, mobile terminal is after photographing program is enabled, the picture of acquisition is portrait, is acted on by acquisition
The belly region of the focusing area set in the touch control operation of moving boundary, such as portrait, after focusing area is got, passes through
Region-growing method detects body region, sends out the master for detecting frame out by Area generation such as by starting point of the belly region of portrait
Body region is portrait.Part in picture in addition to body region is background area.The movement locus of region of variation can pass through fortune
Dynamic detection algorithm is obtained.Motion detection algorithm detection movement locus mainly includes template tracing detection, base based on target area
Tracing detection in characteristic point, the tracing detection based on active contour and tracing detection based on model etc..Wherein, different fortune
The precision of movement locus acquired in dynamic detection algorithm is different.
(4) focusing area is adjusted according to the position of region of variation and movement locus.
After it there is region of variation in detecting picture, the position of acquisition region of variation and motion track information, and according to
The position of region of variation and motion track information adjustment focusing area.Wherein, the position of region of variation includes body region and the back of the body
Scene area, the position of region of variation is different, and the mode of operation that mobile terminal is performed is different.For example, region of variation is main in picture
Body region, because body region is the region that focusing area is formed by algorithm of region growing, then needs correspondence adjustment focusing area；
When region of variation is background area in picture, then without focusing area in adjustment picture.
In one embodiment, included according to the position of region of variation and movement locus adjustment focusing area：According to change
Whether the position judgment in region needs to adjust focusing area；If desired focusing area is adjusted, line is translated on the basis of movement locus
Focusing area.
, can be by the position judgment of region of variation after being detected according to motion detection algorithm and there is region of variation in frame out
Whether focusing area in adjustment picture is needed.If necessary to the focusing area in adjustment picture, then according to the variation zone of acquisition
The movement locus in domain translates focusing area.Wherein, translation focusing area refers to, the line on the basis of the movement locus of region of variation
Translate focus in focusing area so that the movement locus of focus is parallel with the movement locus of region of variation and equal length.Another
In one embodiment, after the movement locus of region of variation is obtained, the Origin And Destination of the movement locus of region of variation is obtained, is put down
The focus for moving focusing area make it that the Origin And Destination of focus connects the line segment to be formed and the Origin And Destination of movement locus is connected
The line segment of formation is parallel and equal length.
In one embodiment, included according to the position of region of variation and movement locus adjustment focusing area：Detection change
Whether region is body region in picture；If region of variation is body region, obtain between region of variation and focusing area away from
From；If distance is in first threshold, need to adjust focusing area.
Mobile terminal, which is detected in picture, to be present after region of variation, body region in judging region of variation whether as picture.
When region of variation is body region in picture, the distance value of focus in the point and focusing area on region of variation, inspection are obtained
Survey the distance value of focus in the point on region of variation and focusing area.Wherein, distance value can be represented by the number of pixel.It is logical
The distance value of focus in point and focusing area on region of variation is crossed, above-mentioned distance value is judged whether in default value range,
If in default value range, needing to adjust focusing area.When region of variation is nearer apart from focusing area, region of variation pair
The influence of focusing area is bigger, then needs the distance between adjustment focusing area.In another embodiment, change is being detected
Region is that in picture after body region, also can detect body region is mass motion or componental movement, if detecting body region
Domain mass motion, then adjust focusing area according to movement locus；If body region componental movement is detected, according to moving region
Judge whether to need to adjust focusing area with the distance between focusing area.
In one embodiment, before according to the position of region of variation and movement locus adjustment focusing area, method is also wrapped
Include：Whether detection picture is stablized；If detecting frame stabilization, according to the position of region of variation and movement locus adjustment focusing area
Domain.
In adjustment picture before focusing area, mobile terminal also needs whether detection picture is stablized, if it is steady to detect picture
Fixed, position and movement locus further according to region of variation adjust focusing area.I.e. in adjustment picture before focusing area, move
Dynamic terminal need to detect in picture region of variation whether stop motion, when region of variation stop motion in picture, then adjustment picture
In focusing area.
In one embodiment, shooting instruction whether is received in preset duration, detects and whether there is in picture again
Region of variation；If detecting there is region of variation in picture again, according to the position of the region of variation detected again and motion
Track adjusts focusing area.
Mobile terminal is after adjustment focusing area, and whether detection receives shooting instruction in preset duration, if receiving
Instruction is shot, then is shot；If not receiving shooting instruction, detect in picture whether deposit again using motion detection algorithm
In region of variation, after region of variation is detected, focusing area is adjusted according to the position of region of variation and movement locus.That is basis
Focusing area in the real-time adjustment picture of the motion conditions of object in picture, to ensure main body imaging clearly in picture.
One of ordinary skill in the art will appreciate that realize all or part of flow in above-described embodiment method, being can be with
The hardware of correlation is instructed to complete by computer program, described program can be stored in a non-volatile computer and can be read
In storage medium, the program is upon execution, it may include such as the flow of the embodiment of above-mentioned each method.Wherein, described storage is situated between
Matter can be magnetic disc, CD, read-only memory (Read-Only Memory, ROM) etc..
Embodiment described above only expresses the several embodiments of the present invention, and it describes more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of focusing method, it is characterised in that including：
After frame stabilization, the focusing area in the picture is obtained；
Detect and whether there is region of variation in the picture；
If detecting and there is region of variation in the picture, position and the movement locus of the region of variation are obtained；
The focusing area is adjusted according to the position of the region of variation and movement locus.
2. focusing method according to claim 1, it is characterised in that the position and motion according to the region of variation
Track, which adjusts the focusing area, to be included：
Whether needed to adjust the focusing area according to the position judgment of the region of variation；
If desired the focusing area is adjusted, line translates the focusing area on the basis of the movement locus.
3. focusing method according to claim 2, it is characterised in that the position and motion according to the region of variation
Track, which adjusts the focusing area, to be included：
Whether detect the region of variation is body region in the picture；
If the region of variation is body region, the distance between the region of variation and described focusing area are obtained；
If the distance is in first threshold, need to adjust the focusing area.
4. focusing method according to claim 1, it is characterised in that the position and motion according to the region of variation
Track is adjusted before the focusing area, and methods described also includes：
Detect whether the picture is stablized；
If detecting the frame stabilization, the focusing area is adjusted according to the position of the region of variation and movement locus.
5. focusing method according to claim 1, it is characterised in that methods described also includes：
Shooting instruction whether is received in preset duration, detects again and whether there is region of variation in the picture；
If detecting again in the picture and there is region of variation, according to the position of the region of variation detected again and motion rail
Mark adjusts the focusing area.
6. a kind of focusing mechanism, it is characterised in that including：
First acquisition module, for after frame stabilization, obtaining the focusing area in the picture；
Detection module, region of variation is whether there is for detecting in the picture；
Second acquisition module, if there is region of variation in the picture for detecting, obtain the region of variation position and
Movement locus；
Adjusting module, the focusing area is adjusted for the position according to the region of variation and movement locus.
7. focusing mechanism according to claim 6, it is characterised in that：
The detection module is additionally operable to before the position according to the region of variation and movement locus adjust the focusing area,
Detect whether the picture is stablized；
If the adjusting module is additionally operable to detect the frame stabilization, according to the position of the region of variation and movement locus
Adjust the focusing area.
8. focusing mechanism according to claim 6, it is characterised in that described device also includes：
The detection module is additionally operable in preset duration whether receive shooting instruction, detects in the picture whether deposit again
In region of variation；
If the adjusting module, which is additionally operable to detect again in the picture, has region of variation, according to the change detected again
The position in region and movement locus adjust the focusing area.
9. a kind of computer-readable recording medium, is stored thereon with computer program, it is characterised in that the program is held by processor
The focusing method as any one of claim 1 to 5 is realized during row.
10. a kind of mobile terminal, including memory, processor and storage are on a memory and the calculating that can run on a processor
Machine program, it is characterised in that pair as any one of claim 1 to 5 is realized during the computing device described program
Burnt method.
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| CN201710400637.3A CN107124556B (en) | 2017-05-31 | 2017-05-31 | Focusing method, focusing device, computer readable storage medium and mobile terminal |
| PCT/CN2018/088877 WO2018219275A1 (en) | 2017-05-31 | 2018-05-29 | Focusing method and device, computer-readable storage medium, and mobile terminal |
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| CN201710400637.3A CN107124556B (en) | 2017-05-31 | 2017-05-31 | Focusing method, focusing device, computer readable storage medium and mobile terminal |
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Also Published As
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| WO2018219275A1 (en) | 2018-12-06 |
| CN107124556B (en) | 2021-03-02 |
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