CN107147823A - Exposure method, device, computer-readable recording medium and mobile terminal - Google Patents
Exposure method, device, computer-readable recording medium and mobile terminal Download PDFInfo
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- CN107147823A CN107147823A CN201710400639.2A CN201710400639A CN107147823A CN 107147823 A CN107147823 A CN 107147823A CN 201710400639 A CN201710400639 A CN 201710400639A CN 107147823 A CN107147823 A CN 107147823A
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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
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/73—Circuitry for compensating brightness variation in the scene by influencing the exposure time
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
- H04N5/144—Movement detection
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Abstract
The present invention relates to a kind of exposure method, device, computer-readable recording medium and mobile terminal.The above method includes：After frame stabilization, region of variation is whether there is in detection picture；There is region of variation in picture if detecting, time for exposure adjusted value is obtained according to the position of the region of variation and pace of change；Time for exposure is adjusted according to the time for exposure adjusted value.The above method, by after frame stabilization, detecting region of variation present in picture, and the adjustment time for exposure of adaptability, can make it that the photo shot is apparent.
Description
Technical field
The present invention relates to field of computer technology, more particularly to a kind of exposure method, device, computer-readable storage medium
Matter and mobile terminal.
Background technology
In photographic process, exposure refers to that light makes photosensitive layer produce latent image by the shutter of camera installation, after exposure
Photosensitive layer is developed, you can obtain image.Wherein, the length of time for exposure can directly affect the texture and definition of image,
Time for exposure is short to cause image exposure not enough, and time for exposure length can cause image exposure excessive.When under-exposure, image is whole
Body is gloomy, color is not bright-coloured；When over-exposed, when over-exposed, image bloom part brilliant white, lack stereovision.
The content of the invention
The embodiment of the present invention provides a kind of exposure method, device, computer-readable recording medium and mobile terminal, can adjust
The whole time for exposure.
A kind of exposure method, including：
After frame stabilization, region of variation is whether there is in detection picture；
There is region of variation in picture if detecting, when obtaining exposure according to the position of the region of variation and pace of change
Between adjusted value；
Time for exposure is adjusted according to the time for exposure adjusted value.
In one of the embodiments, methods described also includes：
Whether detection receives shooting instruction in preset duration；
If not receiving described shoot to instruct, detect again and whether there is region of variation in picture；
If detecting there is region of variation in picture again, according to the region of variation detected again the corresponding time for exposure
Adjusted value adjusts the time for exposure.
In one of the embodiments, it is described that time for exposure tune is obtained according to the position of the region of variation and pace of change
Whole value includes：
According to the position acquisition time for exposure Adjustment precision of the region of variation；
The time for exposure adjusted value is obtained according to the time for exposure Adjustment precision and the pace of change.
In one of the embodiments, include in the detection picture with the presence or absence of region of variation：
Detected by motion detection algorithm and whether there is moving object in picture；If detecting the presence of moving object, really
Determine the presence of the region of variation in picture.
In one of the embodiments, methods described also includes：
Accuracy of detection is set to the motion detection algorithm, is detected according to the accuracy of detection of setting and whether there is institute in picture
State region of variation.
A kind of exposure device, including：
Detection module, for after frame stabilization, region of variation to be whether there is in detection picture；
Acquisition module, if there is region of variation in picture for detecting, according to the position of the region of variation and change
Speed obtains time for exposure adjusted value；
Adjusting module, for adjusting the time for exposure according to the time for exposure adjusted value.
In one of the embodiments, the detection module is additionally operable to detect that whether receiving shooting in preset duration refers to
Order；If not receiving described shoot to instruct, detect again and whether there is region of variation in picture；
If the adjusting module, which is additionally operable to detect again, has region of variation in picture, according to the change detected again
The corresponding time for exposure adjusted value in region adjusts the time for exposure.
In one of the embodiments, the detection module be additionally operable to according to the accuracy of detection of setting detect picture in whether
There is the region of variation
A kind of computer-readable recording medium, is stored thereon with computer program, can when described program is executed by processor
Realize the exposure 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 exposure 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 exposure method in one embodiment；
Fig. 2 is the flow chart of exposure method in another embodiment；
Fig. 3 is the structured flowchart of exposure device 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.
Fig. 1 is the flow chart of exposure method in one embodiment.As shown in figure 1, a kind of exposure method, including step S102
To step S106.Wherein：
S102, after frame stabilization, region of variation is whether there is in detection picture.
Mobile terminal, if detecting the frame stabilization of acquisition, calls motion detection algorithm to examine after photographing program is enabled
Survey and whether there is region of variation in picture.Wherein, mobile terminal can be by obtaining the data of the corresponding gyroscope of present frame picture
Focus ROI's (Region Of Interest, area-of-interest) in the motion state of mobile terminal, present frame picture to detect
Brightness value can detect picture main body whether backlight.Pass through the motion state and picture main body of the corresponding mobile terminal of successive frame picture
Backlight situation can determine that whether the picture of acquisition for mobile terminal is stablized.If gyroscope in the corresponding mobile terminal of successive frame picture
Data value in first threshold, focusing ROI brightness SAD (Sum Of Absolute Differences, absolute value it
With) changing value in Second Threshold, then judge acquisition for mobile terminal frame stabilization.Wherein, mobile terminal detection successive frame
The frame number of picture is predeterminable, and mobile terminal obtains the picture of respective frame according to the frame number of default successive frame and detects that picture is
No stabilization.
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 S104, obtained and exposed according to the position of region of variation and pace of change if detecting in picture
Time adjusted value.
When there is region of variation during mobile terminal is using motion detection algorithm detection frame out, it can be existed according to region of variation
Position and pace of change obtain time for exposure adjusted value in picture.Wherein, the position of region of variation includes body region and the back of the body
Scene area., can be using algorithm of region growing detection after the focusing area of picture is got when mobile terminal enables photographing program
Region in the body region of frame out, picture in addition to body region is background area.For example, mobile terminal is enabling shooting
After program, the picture of acquisition is portrait, by obtaining the focusing area for acting on the touch control operation of moving boundary to set, such as people
The belly region of picture, after focusing area is got, detects body region, such as with the belly area of portrait by region-growing method
Domain is that the body region that starting point sends out detection frame out by Area generation is portrait.Part in picture in addition to body region is
Background area.Obtaining time for exposure adjusted value according to the position of region of variation and pace of change includes：Pass through the position of region of variation
Put that to be body region or background area obtain time for exposure Adjustment precision, obtained according to the pace of change of region of variation when exposing
Between adjusted value.In another embodiment, also it can be body region or background area according to the position of region of variation to obtain exposure
Adjustment precision between light time, time for exposure adjusted value is obtained according to the pace of change of region of variation and change distance.
S106, the time for exposure is adjusted according to time for exposure adjusted value.
By motion detection algorithm, when mobile terminal can obtain exposure in real time according to the position and pace of change of region of variation
Between adjusted value.When there is focusing area in mobile terminal detection frame out, then exposure is adjusted according to time for exposure adjusted value in real time
Between light time；When focusing area is not present in mobile terminal detection frame out, then after it there is focusing area in detecting picture,
Time for exposure is adjusted according to time for exposure adjusted value in real time.I.e. when smaller, the focusing area in picture of region of variation change in picture
When not losing, the time for exposure is adjusted according to the time for exposure adjusted value of acquisition in real time；When region of variation is changed greatly in picture, draw
When focusing area is lost in face, when detecting acquisition focusing area, then the time for exposure is adjusted.
Exposure method in the embodiment of the present invention, when detecting frame stabilization, is detected in picture by motion detection algorithm
With the presence or absence of region of variation, when detect there is region of variation in picture when, adjusted and exposed according to the motion state of region of variation
Time, it may be such that the photo of shooting is apparent, it is to avoid no longer adjustment exposes after frame stabilization is detected in traditional image pickup method
Between light time, the fuzzy situation in subregion in shooting picture caused by picture part regional movement.
In one embodiment, adjusted according to time for exposure adjusted value after the time for exposure, above-mentioned exposure method also includes：Inspection
Whether survey receives shooting instruction in preset duration；If not receiving shooting instruction, detect again in picture with the presence or absence of change
Region；There is region of variation in picture if detecting, the time for exposure is adjusted according to the corresponding time for exposure adjusted value of region of variation.
Mobile terminal is adjusted after the time for exposure according to the time for exposure adjusted value of acquisition, and whether detection connects in preset duration
Shooting instruction is received, if receiving shooting instruction, is shot according to the time for exposure of adjustment；If not receiving shooting instruction,
Using whether there is region of variation in motion detection algorithm detection picture, there is region of variation in picture if detecting, according to change
The position and pace of change for changing region obtain time for exposure adjusted value, and readjust exposure according to the time for exposure adjusted value of acquisition
Between light time.
Exposure method in the embodiment of the present invention, after the adjustment time for exposure, whether detection receives in default duration
The instruction of photo is shot, the instruction for shooting photo is received then according to the time for exposure of adjustment shooting photo；Shooting is not received
The instruction of photo then continues the dynamic adjustment time for exposure, when adjusting exposure in real time according to the motion conditions of region of variation in picture
Between, it is ensured that the definition of shooting picture.
In one embodiment, time for exposure adjusted value bag is obtained according to the position of region of variation and pace of change in S104
Include：According to the position acquisition time for exposure Adjustment precision of region of variation；Obtained according to time for exposure Adjustment precision and pace of change
Time for exposure adjusted value.
Mobile terminal is detected in picture after region of variation by motion detection algorithm, can determine whether that region of variation is in picture
Body region or background area, then the corresponding time for exposure Adjustment precision of default region of variation is obtained, adjusted according to the time for exposure
Whole precision and the pace of change of region of variation obtain time for exposure adjusted value.Wherein, the pace of change of region of variation can pass through
Motion detection algorithm detects, by the value of pixel in error image can obtain the change of each pixel in region of variation away from
From can obtain transformation period by the time difference between two field pictures, each picture can be obtained by changing distance and transformation period
The pace of change of vegetarian refreshments.Wherein, when region of variation is body region in picture, time for exposure Adjustment precision is higher；Become in picture
When changing region for background area, time for exposure Adjustment precision is relatively low.When region of variation is body region, region of variation and focusing
The distance in region is nearer, and time for exposure Adjustment precision is higher.The pace of change of region of variation is faster, the time for exposure adjustment of image
Value is bigger, and the time for exposure is shorter.For example, in the picture of acquisition for mobile terminal, body region is portrait, focusing area is portrait
Head, after frame stabilization, if the region of variation in motion detection algorithm detection picture is the arm of portrait, i.e. region of variation
For body region, time for exposure Adjustment precision is higher, obtains corresponding according to the movement velocity of arm 1,000,000 pixel values per second
Time for exposure adjusted value is -0.005s；If the region changed in motion detection algorithm detection frame out is the vehicle of background area,
Movement velocity is 3,000,000 pixel values per second, and its corresponding time for exposure adjusted value is -0.005s.
In one embodiment, when region of variation is body region, according to the pace of change of region of variation and variation zone
The distance of domain and focusing area obtains time for exposure adjusted value；When region of variation is background area, the time for exposure is not adjusted.
In one embodiment, detected in S102 includes in picture with the presence or absence of region of variation：Pass through motion detection algorithm
Detect and whether there is moving object in picture；If detecting the presence of moving object, it is determined that there is region of variation in picture.
When mobile terminal whether there is region of variation in the stable picture of detection, detected by motion detection algorithm in picture
With the presence or absence of moving object.Wherein, moving object may include the object of mass motion or the object of componental movement.For example, mobile
The picture that terminal is obtained is portrait picture, detects that portrait is overall mobile to the left or to the right in frame out with motion detection algorithm
When, that is, the object of mass motion is detected, then there is region of variation in picture；With people in motion detection algorithm detection frame out
During as arm motion, that is, detect in the object of componental movement, picture and there is region of variation.
In one embodiment, above-mentioned exposure method also includes：Accuracy of detection is set to motion detection algorithm, according to setting
Accuracy of detection detection picture in whether there is region of variation.
Mobile terminal, can also be to motion detection when whether there is region of variation in using motion detection algorithm detection picture
Algorithm sets accuracy of detection.Accuracy of detection is higher, and detectable difference value is smaller between current survey image and background image, i.e.,
Accuracy of detection is higher, and the more small change of region of variation can more be detected.For example, when the accuracy of detection of motion detection algorithm setting
For it is high when, region of variation change pixel value be 100,000 pixel value when can just detect；The detection set when motion detection algorithm
When precision is low, the pixel value of region of variation change can just be detected when being 500,000 pixel value.
In the embodiment of the present invention, accuracy of detection, the motion detection algorithm institute energy of different accuracy are set to motion detection algorithm
The situation of change detected is different.By setting the precision of motion detection algorithm, different detection environment are applicable to, this is improved
The practicality of exposure method in inventive embodiments.
Fig. 2 is the flow chart of exposure method in one embodiment.As shown in Fig. 2 a kind of exposure method, including step S202
To step S12.Wherein：
S202, enables photographing program.Mobile terminal starts photographing program.
S204, detects frame stabilization.By obtaining the gyro data of successive frame and focusing ROI brightness absolute value sum
Judge whether picture is stablized, after frame stabilization is detected, enable motion detection algorithm detection picture.
S206, motion detection algorithm detection picture.Picture is detected using motion detection algorithm.
S208, if detect region of variation.It is no in the stable picture of judgement to there is region of variation, if there is region of variation,
Into step S210；If in the absence of region of variation, into step S212.
S210, if need to adjust the time for exposure.It is according to the judgement of the pace of change of the position of region of variation, region of variation
It is no to need regulation time for exposure and time for exposure adjusted value.If desired the time for exposure is adjusted, into step S214, if need not
The time for exposure is adjusted, into step S212.
S212, receives and shoots instruction shooting.Instruction is shot according to receiving, is shot using current exposure time.
S214, adjusts the time for exposure.Time for exposure is adjusted according to the time for exposure adjusted value of acquisition.
Fig. 3 is the structured flowchart of exposure device in one embodiment.As shown in figure 3, a kind of exposure device, including detection mould
Block 302, acquisition module 304 and adjusting module 306.
Detection module 302, for after frame stabilization, region of variation to be whether there is in detection picture.
Acquisition module 304, if there is region of variation in picture for detecting, according to the position of region of variation and change speed
Degree obtains time for exposure adjusted value.
Adjusting module 306, for adjusting the time for exposure according to time for exposure adjusted value.
In one embodiment, detection module 302 is additionally operable to whether detection receives shooting instruction in preset duration；If
Shooting instruction is not received, is detected again and be whether there is region of variation in picture；If adjusting module is additionally operable to detect picture again
In there is region of variation, the time for exposure is adjusted according to the corresponding time for exposure adjusted value of the region of variation detected again.
In one embodiment, detection module 302 is additionally operable to be detected according to the accuracy of detection of setting and whether there is in picture
Region of variation.
In one embodiment, acquisition module 304 is additionally operable to adjust essence according to the position acquisition time for exposure of region of variation
Degree；Time for exposure adjusted value is obtained according to time for exposure Adjustment precision and pace of change.
In one embodiment, detection module 302 is additionally operable to detect in picture with the presence or absence of fortune by motion detection algorithm
Animal body；If detecting the presence of moving object, it is determined that there is region of variation in picture.
The division of modules is only used for for example, in other embodiments, can fill exposure in above-mentioned exposure device
Put and be divided into different modules as required, to complete all or part of function of above-mentioned exposure device.
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, region of variation is whether there is in detection picture.
Mobile terminal, if detecting the frame stabilization of acquisition, calls motion detection algorithm to examine after photographing program is enabled
Survey and whether there is region of variation in picture.Wherein, mobile terminal can be by obtaining the data of the corresponding gyroscope of present frame picture
Focus ROI's (Region Of Interest, area-of-interest) in the motion state of mobile terminal, present frame picture to detect
Brightness value can detect picture main body whether backlight.Pass through the motion state and picture main body of the corresponding mobile terminal of successive frame picture
Backlight situation can determine that whether the picture of acquisition for mobile terminal is stablized.If gyroscope in the corresponding mobile terminal of successive frame picture
Data value in first threshold, focusing ROI brightness SAD (Sum Of Absolute Differences, absolute value it
With) changing value in Second Threshold, then judge acquisition for mobile terminal frame stabilization.Wherein, mobile terminal detection successive frame
The frame number of picture is predeterminable, and mobile terminal obtains the picture of respective frame according to the frame number of default successive frame and detects that picture is
No stabilization.
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.
(2) there is region of variation in picture if detecting, when obtaining exposure according to the position of region of variation and pace of change
Between adjusted value.
When there is region of variation during mobile terminal is using motion detection algorithm detection frame out, it can be existed according to region of variation
Position and pace of change obtain time for exposure adjusted value in picture.Wherein, the position of region of variation includes body region and the back of the body
Scene area., can be using algorithm of region growing detection after the focusing area of picture is got when mobile terminal enables photographing program
Region in the body region of frame out, picture in addition to body region is background area.For example, mobile terminal is enabling shooting
After program, the picture of acquisition is portrait, by obtaining the focusing area for acting on the touch control operation of moving boundary to set, such as people
The belly region of picture, after focusing area is got, detects body region, such as with the belly area of portrait by region-growing method
Domain is that the body region that starting point sends out detection frame out by Area generation is portrait.Part in picture in addition to body region is
Background area.Obtaining time for exposure adjusted value according to the position of region of variation and pace of change includes：Pass through the position of region of variation
Put that to be body region or background area obtain time for exposure Adjustment precision, obtained according to the pace of change of region of variation when exposing
Between adjusted value.In another embodiment, also it can be body region or background area according to the position of region of variation to obtain exposure
Adjustment precision between light time, time for exposure adjusted value is obtained according to the pace of change of region of variation and change distance.
(3) time for exposure is adjusted according to time for exposure adjusted value.
By motion detection algorithm, when mobile terminal can obtain exposure in real time according to the position and pace of change of region of variation
Between adjusted value.When there is focusing area in mobile terminal detection frame out, then exposure is adjusted according to time for exposure adjusted value in real time
Between light time；When focusing area is not present in mobile terminal detection frame out, then after it there is focusing area in detecting picture,
Time for exposure is adjusted according to time for exposure adjusted value in real time.I.e. when smaller, the focusing area in picture of region of variation change in picture
When not losing, the time for exposure is adjusted according to the time for exposure adjusted value of acquisition in real time；When region of variation is changed greatly in picture, draw
When focusing area is lost in face, when detecting acquisition focusing area, then the time for exposure is adjusted.
In one embodiment, adjusted according to time for exposure adjusted value after the time for exposure, above-mentioned exposure method also includes：Inspection
Whether survey receives shooting instruction in preset duration；If not receiving shooting instruction, detect again in picture with the presence or absence of change
Region；There is region of variation in picture if detecting, the time for exposure is adjusted according to the corresponding time for exposure adjusted value of region of variation.
Mobile terminal is adjusted after the time for exposure according to the time for exposure adjusted value of acquisition, and whether detection connects in preset duration
Shooting instruction is received, if receiving shooting instruction, is shot according to the time for exposure of adjustment；If not receiving shooting instruction,
Using whether there is region of variation in motion detection algorithm detection picture, there is region of variation in picture if detecting, according to change
The position and pace of change for changing region obtain time for exposure adjusted value, and readjust exposure according to the time for exposure adjusted value of acquisition
Between light time.
In one embodiment, time for exposure adjustment is obtained according to the position of region of variation and pace of change in step (2)
Value includes：According to the position acquisition time for exposure Adjustment precision of region of variation；According to time for exposure Adjustment precision and pace of change
Obtain time for exposure adjusted value.
Mobile terminal is detected in picture after region of variation by motion detection algorithm, can determine whether that region of variation is in picture
Body region or background area, then the corresponding time for exposure Adjustment precision of default region of variation is obtained, adjusted according to the time for exposure
Whole precision and the pace of change of region of variation obtain time for exposure adjusted value.Wherein, the pace of change of region of variation can pass through
Motion detection algorithm detects, by the value of pixel in error image can obtain the change of each pixel in region of variation away from
From can obtain transformation period by the time difference between two field pictures, each picture can be obtained by changing distance and transformation period
The pace of change of vegetarian refreshments.Wherein, when region of variation is body region in picture, time for exposure Adjustment precision is higher；Become in picture
When changing region for background area, time for exposure Adjustment precision is relatively low.When region of variation is body region, region of variation and focusing
The distance in region is nearer, and time for exposure Adjustment precision is higher.The pace of change of region of variation is faster, the time for exposure adjustment of image
Value is bigger, and the time for exposure is shorter.
In one embodiment, when region of variation is body region, according to the pace of change of region of variation and variation zone
The distance of domain and focusing area obtains time for exposure adjusted value；When region of variation is background area, the time for exposure is not adjusted.
In one embodiment, include in step (1) in detection picture with the presence or absence of region of variation：Calculated by motion detection
It whether there is moving object in method detection picture；If detecting the presence of moving object, it is determined that there is region of variation in picture.
When mobile terminal whether there is region of variation in the stable picture of detection, detected by motion detection algorithm in picture
With the presence or absence of moving object.Wherein, moving object may include the object of mass motion or the object of componental movement.
In one embodiment, above-mentioned exposure method also includes：Accuracy of detection is set to motion detection algorithm, according to setting
Accuracy of detection detection picture in whether there is region of variation.
Mobile terminal, can also be to motion detection when whether there is region of variation in using motion detection algorithm detection picture
Algorithm sets accuracy of detection.Accuracy of detection is higher, and detectable difference value is smaller between current survey image and background image, i.e.,
Accuracy of detection is higher, and the more small change of region of variation can more be detected.
The embodiment of the present invention additionally provides a kind of mobile terminal.As shown in figure 3, 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 480 included by the mobile terminal performs the calculating of storage on a memory
Following steps are realized during machine program：
(1) after frame stabilization, region of variation is whether there is in detection picture.
Mobile terminal, if detecting the frame stabilization of acquisition, calls motion detection algorithm to examine after photographing program is enabled
Survey and whether there is region of variation in picture.Wherein, mobile terminal can be by obtaining the data of the corresponding gyroscope of present frame picture
Focus ROI's (Region Of Interest, area-of-interest) in the motion state of mobile terminal, present frame picture to detect
Brightness value can detect picture main body whether backlight.Pass through the motion state and picture main body of the corresponding mobile terminal of successive frame picture
Backlight situation can determine that whether the picture of acquisition for mobile terminal is stablized.If gyroscope in the corresponding mobile terminal of successive frame picture
Data value in first threshold, focusing ROI brightness SAD (Sum Of Absolute Differences, absolute value it
With) changing value in Second Threshold, then judge acquisition for mobile terminal frame stabilization.Wherein, mobile terminal detection successive frame
The frame number of picture is predeterminable, and mobile terminal obtains the picture of respective frame according to the frame number of default successive frame and detects that picture is
No stabilization.
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.
(2) there is region of variation in picture if detecting, when obtaining exposure according to the position of region of variation and pace of change
Between adjusted value.
When there is region of variation during mobile terminal is using motion detection algorithm detection frame out, it can be existed according to region of variation
Position and pace of change obtain time for exposure adjusted value in picture.Wherein, the position of region of variation includes body region and the back of the body
Scene area., can be using algorithm of region growing detection after the focusing area of picture is got when mobile terminal enables photographing program
Region in the body region of frame out, picture in addition to body region is background area.For example, mobile terminal is enabling shooting
After program, the picture of acquisition is portrait, by obtaining the focusing area for acting on the touch control operation of moving boundary to set, such as people
The belly region of picture, after focusing area is got, detects body region, such as with the belly area of portrait by region-growing method
Domain is that the body region that starting point sends out detection frame out by Area generation is portrait.Part in picture in addition to body region is
Background area.Obtaining time for exposure adjusted value according to the position of region of variation and pace of change includes：Pass through the position of region of variation
Put that to be body region or background area obtain time for exposure Adjustment precision, obtained according to the pace of change of region of variation when exposing
Between adjusted value.In another embodiment, also it can be body region or background area according to the position of region of variation to obtain exposure
Adjustment precision between light time, time for exposure adjusted value is obtained according to the pace of change of region of variation and change distance.
(3) time for exposure is adjusted according to time for exposure adjusted value.
By motion detection algorithm, when mobile terminal can obtain exposure in real time according to the position and pace of change of region of variation
Between adjusted value.When there is focusing area in mobile terminal detection frame out, then exposure is adjusted according to time for exposure adjusted value in real time
Between light time；When focusing area is not present in mobile terminal detection frame out, then after it there is focusing area in detecting picture,
Time for exposure is adjusted according to time for exposure adjusted value in real time.I.e. when smaller, the focusing area in picture of region of variation change in picture
When not losing, the time for exposure is adjusted according to the time for exposure adjusted value of acquisition in real time；When region of variation is changed greatly in picture, draw
When focusing area is lost in face, when detecting acquisition focusing area, then the time for exposure is adjusted.
In one embodiment, adjusted according to time for exposure adjusted value after the time for exposure, above-mentioned exposure method also includes：Inspection
Whether survey receives shooting instruction in preset duration；If not receiving shooting instruction, detect again in picture with the presence or absence of change
Region；There is region of variation in picture if detecting, the time for exposure is adjusted according to the corresponding time for exposure adjusted value of region of variation.
Mobile terminal is adjusted after the time for exposure according to the time for exposure adjusted value of acquisition, and whether detection connects in preset duration
Shooting instruction is received, if receiving shooting instruction, is shot according to the time for exposure of adjustment；If not receiving shooting instruction,
Using whether there is region of variation in motion detection algorithm detection picture, there is region of variation in picture if detecting, according to change
The position and pace of change for changing region obtain time for exposure adjusted value, and readjust exposure according to the time for exposure adjusted value of acquisition
Between light time.
In one embodiment, time for exposure adjustment is obtained according to the position of region of variation and pace of change in step (2)
Value includes：According to the position acquisition time for exposure Adjustment precision of region of variation；According to time for exposure Adjustment precision and pace of change
Obtain time for exposure adjusted value.
Mobile terminal is detected in picture after region of variation by motion detection algorithm, can determine whether that region of variation is in picture
Body region or background area, then the corresponding time for exposure Adjustment precision of default region of variation is obtained, adjusted according to the time for exposure
Whole precision and the pace of change of region of variation obtain time for exposure adjusted value.Wherein, the pace of change of region of variation can pass through
Motion detection algorithm detects, by the value of pixel in error image can obtain the change of each pixel in region of variation away from
From can obtain transformation period by the time difference between two field pictures, each picture can be obtained by changing distance and transformation period
The pace of change of vegetarian refreshments.Wherein, when region of variation is body region in picture, time for exposure Adjustment precision is higher；Become in picture
When changing region for background area, time for exposure Adjustment precision is relatively low.When region of variation is body region, region of variation and focusing
The distance in region is nearer, and time for exposure Adjustment precision is higher.The pace of change of region of variation is faster, the time for exposure adjustment of image
Value is bigger, and the time for exposure is shorter.
In one embodiment, when region of variation is body region, according to the pace of change of region of variation and variation zone
The distance of domain and focusing area obtains time for exposure adjusted value；When region of variation is background area, the time for exposure is not adjusted.
In one embodiment, include in step (1) in detection picture with the presence or absence of region of variation：Calculated by motion detection
It whether there is moving object in method detection picture；If detecting the presence of moving object, it is determined that there is region of variation in picture.
When mobile terminal whether there is region of variation in the stable picture of detection, detected by motion detection algorithm in picture
With the presence or absence of moving object.Wherein, moving object may include the object of mass motion or the object of componental movement.
In one embodiment, above-mentioned exposure method also includes：Accuracy of detection is set to motion detection algorithm, according to setting
Accuracy of detection detection picture in whether there is region of variation.
Mobile terminal, can also be to motion detection when whether there is region of variation in using motion detection algorithm detection picture
Algorithm sets accuracy of detection.Accuracy of detection is higher, and detectable difference value is smaller between current survey image and background image, i.e.,
Accuracy of detection is higher, and the more small change of region of variation can more be detected.
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
Instruct the hardware of correlation to complete by computer program, program can be stored in a non-volatile computer storage can be read
In medium, the program is upon execution, it may include such as the flow of the embodiment of above-mentioned each method.Wherein, storage medium can be magnetic
Dish, CD, read-only memory (Read-Only Memory, ROM) etc..
Above example only expresses the several embodiments of the present invention, and it describes more specific and detailed, but can not
Therefore it is interpreted as the limitation to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art,
Without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection model of the present invention
Enclose.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of exposure method, it is characterised in that including：
After frame stabilization, region of variation is whether there is in detection picture；
There is region of variation in picture if detecting, time for exposure tune is obtained according to the position of the region of variation and pace of change
Whole value；
Time for exposure is adjusted according to the time for exposure adjusted value.
2. exposure method according to claim 1, it is characterised in that described adjusted according to the time for exposure adjusted value exposes
After between light time, methods described also includes：
Whether detection receives shooting instruction in preset duration；
If not receiving described shoot to instruct, detect again and whether there is region of variation in picture；
If detecting there is region of variation in picture again, adjusted according to the region of variation detected again the corresponding time for exposure
The value adjustment time for exposure.
3. exposure method according to claim 1, it is characterised in that the position and change according to the region of variation
Speed, which obtains time for exposure adjusted value, to be included：
According to the position acquisition time for exposure Adjustment precision of the region of variation；
The time for exposure adjusted value is obtained according to the time for exposure Adjustment precision and the pace of change.
4. exposure method according to claim 1, it is characterised in that whether there is region of variation bag in the detection picture
Include：
Detected by motion detection algorithm and whether there is moving object in picture；If detecting the presence of moving object, it is determined that draw
There is the region of variation in face.
5. exposure method according to claim 4, it is characterised in that methods described also includes：
Accuracy of detection is set to the motion detection algorithm, detected according to the accuracy of detection of setting in picture with the presence or absence of the change
Change region.
6. a kind of exposure device, it is characterised in that including：
Detection module, for after frame stabilization, region of variation to be whether there is in detection picture；
Acquisition module, if there is region of variation in picture for detecting, according to the position of the region of variation and pace of change
Obtain time for exposure adjusted value；
Adjusting module, for adjusting the time for exposure according to the time for exposure adjusted value.
7. exposure device according to claim 6, it is characterised in that：
The detection module is additionally operable to whether detection receives shooting instruction in preset duration；If not receiving the shooting to refer to
Order, detects and whether there is region of variation in picture again；
If the adjusting module, which is additionally operable to detect again, has region of variation in picture, according to the region of variation detected again
Corresponding time for exposure adjusted value adjusts the time for exposure.
8. exposure device according to claim 6, it is characterised in that：
The detection module, which is additionally operable to be detected according to the accuracy of detection of setting, whether there is the region of variation in picture.
9. a kind of computer-readable recording medium, is stored thereon with computer program, it is characterised in that described program is by processor
The exposure method as any one of claim 1 to 5 can be realized during execution.
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, realizes the exposure method as any one of claim 1 to 5 during the computing device described program.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710400639.2A CN107147823A (en) | 2017-05-31 | 2017-05-31 | Exposure method, device, computer-readable recording medium and mobile terminal |
| PCT/CN2018/088820 WO2018219267A1 (en) | 2017-05-31 | 2018-05-29 | Exposure method and device, computer-readable storage medium, and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710400639.2A CN107147823A (en) | 2017-05-31 | 2017-05-31 | Exposure method, device, computer-readable recording medium and mobile terminal |
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| CN201710400639.2A Pending CN107147823A (en) | 2017-05-31 | 2017-05-31 | Exposure method, device, computer-readable recording medium and mobile terminal |
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| WO (1) | WO2018219267A1 (en) |
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| CN110710194A (en) * | 2019-08-30 | 2020-01-17 | 中新智擎科技有限公司 | Exposure method and device, camera module and electronic equipment |
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