CN105681668B - Control method, control device and electronic device - Google Patents
Control method, control device and electronic device Download PDFInfo
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- CN105681668B CN105681668B CN201610115552.6A CN201610115552A CN105681668B CN 105681668 B CN105681668 B CN 105681668B CN 201610115552 A CN201610115552 A CN 201610115552A CN 105681668 B CN105681668 B CN 105681668B
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- control
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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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- 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
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Abstract
The invention discloses a kind of control methods, for controlling imaging device.Control method includes: the first rate-determining steps and the second rate-determining steps.First rate-determining steps control imaging device carries out the convergence of automatic exposure value and carries out slightly searching for phase focal modes.The control imaging device progress after slightly searching completion and the convergence of automatic exposure value of second rate-determining steps is carefully searched to complete to focus.In addition, the invention also discloses a kind of control device and electronic devices.Control method, control device and the electronic device of embodiment of the present invention start control imaging device during automatic exposure value is convergent and carry out slightly searching process, and carry out carefully searching process after completing slightly to search and after the completion convergence of automatic exposure value.Automatic exposure value is restrained to and slightly searched movement while being carried out, the success rate of focusing has not only been ensure that, but also reduce the action link in entire focus process, has effectively improved focusing speed.
Description
Technical field
The present invention relates to imaging technique, in particular to a kind of control method, control device and electronic device.
Background technique
It needs first to determine automatic exposure value before mobile phone camera focusing, it is accurate just to can guarantee focusing, but also cause just because of this whole
A focus process is slack-off, and user experience is bad.
Summary of the invention
The present invention is directed at least solve one of the technical problems existing in the prior art.For this purpose, the present invention needs to provide one
Kind control method, control device and electronic device.
The control method of embodiment of the present invention, for controlling imaging device, the control method includes:
First rate-determining steps control the imaging device and carry out the convergence of automatic exposure value and carry out the thick of phase focal modes
It searches；And
Second rate-determining steps are completed and control the imaging device after automatic exposure value convergence to carry out in described slightly search
Carefully search to complete to focus.
The control device of embodiment of the present invention, for controlling imaging device, the control device includes:
First control module, first control module carry out the convergence of automatic exposure value simultaneously for controlling the imaging device
Carry out slightly searching for phase focal modes；And
Second control module, second control module are used to complete and after automatic exposure value convergence in described slightly search
The imaging device progress is controlled carefully to search to complete to focus.
The electronic device of embodiment of the present invention, including imaging device and control device as described above.
Control method, control device and the electronic device of embodiment of the present invention, during automatic exposure value is convergent
Start control imaging device to carry out slightly searching process, and carefully searched after completing slightly to search and after the completion convergence of automatic exposure value
Journey.Automatic exposure value is restrained to and slightly searched movement while being carried out, not only ensure that the success rate of focusing, but also reduce and entirely focused
Action link in journey, effectively improves focusing speed.
The advantages of additional aspect of the invention, will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect and advantage of the invention is from combining in description of the following accompanying drawings to embodiment by change
It obtains obviously and is readily appreciated that, in which:
Fig. 1 is the flow diagram of the control method of embodiment of the present invention.
Fig. 2 is the functional block diagram of the control device of embodiment of the present invention.
Fig. 3 is the status diagram of the control method of embodiment of the present invention.
Fig. 4 is the flow diagram of the control method of certain embodiments of the present invention.
Fig. 5 is the functional block diagram of the control device of certain embodiments of the present invention.
Fig. 6 is the status diagram of the control method of certain embodiments of the present invention.
Specific embodiment
Embodiments of the present invention are described below in detail, the example of the embodiment is shown in the accompanying drawings, wherein identical
Or similar label indicates same or similar element or element with the same or similar functions from beginning to end.
It is exemplary below with reference to the embodiment of attached drawing description, embodiment for explaining only the invention,
And it should not be understood as the limitation to embodiments of the present invention.
Referring to Fig. 1, the control method of embodiment of the present invention, for controlling imaging device.Control method includes following
Step:
S10: control imaging device carries out the convergence of automatic exposure value and carries out slightly searching for phase focal modes；And
S20: the progress of control imaging device is carefully searched to complete to focus after slightly searching completion and the convergence of automatic exposure value.
Referring to Fig. 2, the control device 100 of embodiment of the present invention includes the first control module 10 and the second control module
20.As an example, the control method of embodiment of the present invention can be realized by the control device 100 of embodiment of the present invention, and
It can be applied to electronic device 1000, electronic device 1000 may include control device 100 and imaging device 200.
Wherein, the step S10 of the control method of embodiment of the present invention can be realized by the first control module 10, and step
S20 can be realized by the second control module 20.In other words, the first control module 10 carries out certainly for controlling imaging device 200
Dynamic exposure value restrains and carries out slightly searching for phase focal modes, and the second control module 20 is used to slightly search completion and automatic exposure
Control imaging device 200 is carefully searched to complete to focus after value convergence.
User acquires picture signal when being imaged using imaging device 200, through imaging sensor, and passes through display
Screen is shown to be checked for user, and user adjusts the direction of imaging device 200, position and finds a view to adjust.When imaging device 200
When switching in different scenes, since the corresponding automatic exposure value of different scenes image is different, needed before focusing to certainly
Dynamic exposure value is adjusted, and the unlatching of focus operation could be triggered after automatic exposure value restrains again.Such as from dark scene
It is switched to bright scene, automatic exposure value corresponding to each scene is different.Accordingly, it so that the triggering of focus operation is slack-off, influences
Focusing speed.
Imaging device 200 includes imaging sensor, can acquire image by imaging sensor, and imaging sensor can be with
It is linear transducer.Since the focusing speed of phase focal modes is very fast, imaging device 200 would generally use phase focal modes
As one of focusing mode.In phase focus process, imaging device 200 obtains two images by imaging sensor, from
And the image pixel waveform of the two images is obtained, and calculate the phase difference value between the two image pixel waveforms, according to
Phase difference value carries out phase focusing.Specifically, the pixel of imaging sensor includes left pixel in phase focal modes
With right pixel, thus in focusing, two images acquired in imaging sensor are respectively that imaging sensor passes through left pixel
The image that point and right pixel obtain.
The data waveform that two images can be generated respectively according to the image of acquisition, since waveform is there are wave crest and trough,
Therefore, imaging device 200 can calculate the phase difference between two images by the phase between the wave crest and trough of waveform
Value could obtain clearest image only when phase difference is zero, and when, there are when phase difference, being needed between two images
Clearly image is obtained by way of focusing.Under phase focal modes, focusing mirror can be determined according to calculated phase difference
The position of head, to realize focusing.
Referring to Fig. 3, the focus process of phase focal modes generally includes slightly to search and carefully searches process, slightly the process of searching is usually
According to the position for the focus lens that phase difference calculated determines, focus lens are pushed to advance to larger step pitch by focusing motor
Near the position, and carefully searching process is usually in the position nearby by focusing motor to push focus lens to find most compared with half step distance
Best placement that is to say the position for capableing of blur-free imaging.The size of focusing motor step pitch is controlled by the size of the pulse signal of electric current
System.
It is appreciated that the accuracy and clarity of focus operation are mainly influenced by the thin process of searching, and slightly the process of searching can't
It influences.
The control method of embodiment of the present invention, control imaging device 200 carry out automatic exposure value convergence while into
Row phase focal modes are slightly searched, and control imaging device 200 has carefully been searched after slightly searching completion and the convergence of automatic exposure value
At focusing.
Movement slightly is searched carrying out convergent start simultaneously at of automatic exposure value, accelerates the triggering for carefully searching process, so as to shorten
The time of entire focus process (restraining including automatic exposure value), accelerate focusing speed.
Wherein, the synchronous progress of asynchronous thread can be used in the convergence of automatic exposure value and slightly searching for focusing.
In conclusion the control method of embodiment of the present invention, control device 100 and electronic device 1000, are exposing automatically
Control imaging device 200 is slightly searched process while light value is restrained, and after completing slightly to search and automatic exposure value completes convergence
It carries out carefully searching process afterwards.Automatic exposure value is restrained to and slightly searched movement while being carried out, not only ensure that the success rate of focusing, but also reduce
Action link in entire focus process, effectively improves focusing speed.
In some embodiments, electronic device 1000 can be the electronics that mobile phone or tablet computer etc. have camera function
Terminal.And imaging device 200 includes preposition and/or rearmounted camera.
It is appreciated that electronic device 1000 includes but is not limited to the example of present embodiment.
Referring to Fig. 4, in some embodiments, step S20 comprising steps of
S21: judge whether the convergence of automatic exposure value is completed when slightly searching completion；
S22: it if convergence is completed, controls imaging device progress and carefully searches to complete to focus；And
S23: if convergence does not complete, imaging device pause focusing is controlled until carefully being searched after the completion of convergence.
Referring to Fig. 5, in some embodiments, the second control module 20 includes control of judging submodule 21, first
Module 22 and the second control submodule 23.Step S21 can be realized that step S22 can be by the first control by judging submodule 21
Submodule 22 is realized, and step S23 can be realized by the second control submodule 23.In other words, judging submodule 21 is used for thick
Judge whether the convergence of automatic exposure value is completed when searching completion.First control submodule 22 is used for when automatic exposure value restrains completion
Control imaging device 200 is carefully searched to complete to focus.And the second control submodule 23 is not complete for restraining in automatic exposure value
The pause of device 200 focusing is formed as at time control until carefully being searched after the completion of convergence.
Such as the explanation of above embodiment, it will be understood that it will affect the accuracy and clarity of focusing due to carefully searching,
Therefore carefully searching should carry out after the completion of automatic exposure value restrains.In present embodiment, automatic exposure value is restrained and is slightly searched simultaneously
It carries out.When slightly searching completion, judging submodule 21 judges whether the convergence of automatic exposure value is completed, if completing, controls imaging dress
It sets 200 and is carefully searched completion focusing.If do not complete, suspend focus process until automatic exposure value complete convergence, be further continued for into
Row carefully searches completion focusing.In this way, promoted focus efficiency while still ensure that focusing it is accurate with it is clear.
In some embodiments, imaging device 200 includes imaging sensor, and imaging sensor includes detecting phase picture
Element is slightly searched and is carried out according to the left and right waveform of detecting phase pixel output.
In such an embodiment, imaging device 200 further includes focusing motor and focus lens, and focusing motor is used for root
Focus lens are pushed slightly to be searched according to the left and right waveform of output.
Wherein, the explanation of the principle of phase focal modes and the principle slightly searched, please refers in above embodiment
The explanation of corresponding portion, is no longer developed in details herein.
In this way, the position of focus lens can be calculated according to the waveform of the left and right pixel of phase focusing, and by horse of focusing
Realize that the thick of focusing searches process up to driving.
In some embodiments, imaging device 200 includes focusing motor and focus lens, and focusing motor is for driving pair
Zoom lens to multiple positions are carefully searched, and the image that imaging device 200 exports at each position according to focus lens is carefully searched
Focus value carries out.
Focus value is usually to be obtained after handling the image that imaging device 200 exports for characterizing image definition
Data.Generally, the contrast for scene of focusing is higher, and the focus value of image is higher.When by finding image focus value highest
Corresponding focusing position is to realize focusing.
Referring to Fig. 6, counting focus lens during carefully searching each and carefully searching position, it that is to say that focusing motor drives
The focus value of the frame image for the position that focus lens often take a step forward, when thus finding focus value maximum corresponding focusing position into
And realize focusing.
The control device 100 and electronic device 1000 of embodiment of the present invention other parts undeployed, can join the above reality
The corresponding part for applying the control method of mode, is no longer developed in details herein.
In the description of embodiments of the present invention, it is to be understood that term " center ", " longitudinal direction ", " transverse direction ", " length
Degree ", " width ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner",
The orientation or positional relationship of the instructions such as "outside", " clockwise ", " counterclockwise " is to be based on the orientation or positional relationship shown in the drawings, only
It is embodiments of the present invention and simplified description for ease of description, rather than the device or element of indication or suggestion meaning are necessary
It with specific orientation, is constructed and operated in a specific orientation, therefore should not be understood as the limitation to embodiments of the present invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more feature.In the description of embodiments of the present invention, the meaning of " plurality " is two
It is a or more than two, unless otherwise specifically defined.
In the description of embodiments of the present invention, it should be noted that unless otherwise clearly defined and limited, term
" installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be mechanical connection, be also possible to be electrically connected or can mutually communicate；It can be directly connected, can also lead to
It crosses intermediary to be indirectly connected, can be the connection inside two elements or the interaction relationship of two elements.For ability
For the those of ordinary skill in domain, can understand as the case may be above-mentioned term in embodiments of the present invention specifically contain
Justice.
In embodiments of the present invention unless specifically defined or limited otherwise, fisrt feature second feature it
"upper" or "lower" may include that the first and second features directly contact, may include the first and second features be not directly to connect yet
It touches but by the other characterisation contact between them.Moreover, fisrt feature second feature " on ", " top " and " on
Face " includes fisrt feature right above second feature and oblique upper, or to be merely representative of first feature horizontal height special higher than second
Sign.Fisrt feature under the second feature " below ", " below " and " below " include fisrt feature right above second feature and tiltedly on
Side, or first feature horizontal height is merely representative of less than second feature.
Above disclosure provides many different embodiments or example is used to realize embodiments of the present invention not
Same structure.In order to simplify the disclosure of embodiments of the present invention, above the component of specific examples and setting are described.When
So, they are merely examples, and is not intended to limit the present invention.In addition, embodiments of the present invention can be in different examples
Repeat reference numerals and/or reference letter in son, this repetition are for purposes of simplicity and clarity, itself not indicate to be begged for
By the relationship between various embodiments and/or setting.In addition, the various specific techniques that embodiments of the present invention provide
With the example of material, but those of ordinary skill in the art may be aware that the application of other techniques and/or other materials make
With.
In the description of this specification, reference term " embodiment ", " some embodiments ", " schematically implementation
The description of mode ", " example ", specific examples or " some examples " etc. means the tool described in conjunction with the embodiment or example
Body characteristics, structure, material or feature are contained at least one embodiment or example of the invention.In the present specification,
Schematic expression of the above terms are not necessarily referring to identical embodiment or example.Moreover, the specific features of description, knot
Structure, material or feature can be combined in any suitable manner in any one or more embodiments or example.
Any process described otherwise above or method description are construed as in flow chart or herein, and expression includes
It is one or more for realizing specific logical function or process the step of executable instruction code module, segment or portion
Point, and the range of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discussed suitable
Sequence, including according to related function by it is basic simultaneously in the way of or in the opposite order, to execute function, this should be of the invention
Embodiment person of ordinary skill in the field understood.
Expression or logic and/or step described otherwise above herein in flow charts, for example, being considered use
In the order list for the executable instruction for realizing logic function, may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment (such as computer based system, including the system of processing module or other can be from instruction
Execute system, device or equipment instruction fetch and the system that executes instruction) use, or combine these instruction execution systems, device or
Equipment and use.For the purpose of this specification, " computer-readable medium " can be it is any may include, store, communicating, propagating or
Transfer program uses for instruction execution system, device or equipment or in conjunction with these instruction execution systems, device or equipment
Device.The more specific example (non-exhaustive list) of computer-readable medium include the following: there are one or more wirings
Electrical connection section (electronic device), portable computer diskette box (magnetic device), random access memory (RAM), read-only memory
(ROM), erasable edit read-only storage (EPROM or flash memory), fiber device and portable optic disk is read-only deposits
Reservoir (CDROM).In addition, computer-readable medium can even is that the paper that can print described program on it or other are suitable
Medium, because can then be edited, be interpreted or when necessary with it for example by carrying out optical scanner to paper or other media
His suitable method is handled electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each section of embodiments of the present invention can be with hardware, software, firmware or their combination come real
It is existing.In the above-described embodiment, multiple steps or method can be with storages in memory and by suitable instruction execution system
The software or firmware of execution is realized.For example, if realized with hardware, in another embodiment, ability can be used
Any one of following technology or their combination well known to domain is realized: being had for realizing logic function to data-signal
The discrete logic of logic gates, the specific integrated circuit with suitable combinational logic gate circuit, programmable gate array
(PGA), field programmable gate array (FPGA) etc..
Those skilled in the art are understood that realize all or part of step that above-described embodiment method carries
It suddenly is that relevant hardware can be instructed to complete by program, the program can store in a kind of computer-readable storage medium
In matter, which when being executed, includes the steps that one or a combination set of embodiment of the method.
In addition, each functional unit in various embodiments of the present invention can integrate in a processing module, it can also
To be that each unit physically exists alone, can also be integrated in two or more units in a module.It is above-mentioned integrated
Module both can take the form of hardware realization, can also be realized in the form of software function module.The integrated module
If in the form of software function module realize and when sold or used as an independent product, also can store one calculating
In machine read/write memory medium.
Storage medium mentioned above can be read-only memory, disk or CD etc..
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (13)
1. a kind of control method, for controlling imaging device, which is characterized in that the control method includes:
First rate-determining steps control the imaging device and carry out carrying out the thick of phase focal modes while the convergence of automatic exposure value
It searches；And
Second rate-determining steps are completed and control the imaging device after automatic exposure value convergence carefully to be searched in described slightly search
To complete focusing.
2. control method as described in claim 1, which is characterized in that second rate-determining steps include:
It is described slightly search completion when judge whether automatic exposure value convergence is completed；
If the convergence is completed, controls the imaging device and described carefully search to complete the focusing；And
If the convergence is unfinished, the imaging device pause focusing is controlled until after the completion of the convergence described in progress
Carefully search.
3. control method as described in claim 1, which is characterized in that the imaging device includes imaging sensor, the figure
As sensor includes detecting phase pixel, described slightly search carries out according to the left and right waveform of detecting phase pixel output.
4. control method as claimed in claim 3, which is characterized in that the imaging device includes focusing motor and focusing mirror
Head, the focusing motor are used to be pushed the focus lens progress is described slightly to search according to the waveform.
5. control method as described in claim 1, which is characterized in that the imaging device includes focusing motor and focusing mirror
Head, the focusing motor are described carefully to search according to described right for driving the focus lens carefully to search to the progress of multiple positions is described
Zoom lens focus value of the image of the imaging device output at each position carries out.
6. a kind of control device, for controlling imaging device, which is characterized in that the control device includes:
First control module, while first control module carries out the convergence of automatic exposure value for controlling the imaging device
Carry out slightly searching for phase focal modes；And
Second control module, second control module are used to complete and control after automatic exposure value convergence in described slightly search
The imaging device progress is carefully searched to complete to focus.
7. control device as claimed in claim 6, which is characterized in that second control module includes:
Judging submodule, the judging submodule be used for it is described slightly search completion when judge whether automatic exposure value convergence complete
At；
First control submodule, first control submodule are used to control the imaging device when the convergence is completed and carry out
It is described carefully to search to complete the focusing；And
Second control submodule, second control submodule are used to control the imaging device when the convergence does not complete temporary
Stop the focusing until described carefully search after the completion of the convergence.
8. control device as claimed in claim 6, which is characterized in that the imaging device includes imaging sensor, the figure
As sensor includes detecting phase pixel, described slightly search carries out according to the left and right waveform of detecting phase pixel output.
9. control device as claimed in claim 8, which is characterized in that the imaging device includes focusing motor and focusing mirror
Head, the focusing motor are used to be pushed the focus lens progress is described slightly to search according to the waveform.
10. control device as claimed in claim 6, which is characterized in that the imaging device includes focusing motor and focusing mirror
Head, the focusing motor are described carefully to search according to described right for driving the focus lens carefully to search to the progress of multiple positions is described
Zoom lens focus value of the image of the imaging device output at each position carries out.
11. a kind of electronic device, which is characterized in that including the control device as described in claim 6-10 any one.
12. electronic device as claimed in claim 11, which is characterized in that the electronic device includes mobile phone or tablet computer.
13. electronic device as claimed in claim 11, which is characterized in that the imaging device include Front camera and/or after
Set camera.
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| CN110632734B (en) | 2017-05-24 | 2021-09-14 | Oppo广东移动通信有限公司 | Focusing method and related product |
| CN107343155B (en) | 2017-07-10 | 2019-03-29 | Oppo广东移动通信有限公司 | Inhibit method and device, the terminal device of AEC jump |
| CN110418068B (en) * | 2019-07-24 | 2020-12-08 | 浙江大华技术股份有限公司 | Focusing method, device, electronic equipment and storage medium |
| CN110719404B (en) * | 2019-10-10 | 2021-09-21 | 浙江大华技术股份有限公司 | Electric lens control method and device |
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Address after: 523860 No. 18, Wu Sha Beach Road, Changan Town, Dongguan, Guangdong Applicant after: OPPO Guangdong Mobile Communications Co., Ltd. Address before: 523859 No. 18, Wu Sha Beach Road, Changan Town, Dongguan, Guangdong Applicant before: Guangdong OPPO Mobile Communications Co., Ltd. |
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