CN105791682A - Control method, control device and electronic device - Google Patents
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- CN105791682A CN105791682A CN201610115551.1A CN201610115551A CN105791682A CN 105791682 A CN105791682 A CN 105791682A CN 201610115551 A CN201610115551 A CN 201610115551A CN 105791682 A CN105791682 A CN 105791682A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/67—Focus control based on electronic image sensor signals
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Abstract
The invention discloses a control method. The method comprises a first control step, a judging step and a second control step. The first control step is used for controlling an imaging device to use a contrast focusing mode to focus, thus obtaining a focus value FV waveform. The judging step is used for judging whether the FV waveform appears a high inflection point or not. The second control step is used for controlling the imaging device to use an assistant focusing mode to focus when the FV waveform appears the high inflection point. The invention also discloses a control device and an electronic device. According to the control method, the control device and the electronic device provided by the embodiment of the invention, focusing can be successfully realized through adoption of the assistant focusing mode in some scenes with relatively low contrast.
Description
Technical field
The present invention relates to imaging technique, particularly to the control method of a kind of imaging device, control device and electronic installation.
Background technology
For the scene that some contrast is relatively low, existing contrast formula focal modes possibly cannot realize focusing.
Summary of the invention
It is contemplated that at least solve one of technical problem of existence in prior art.For this, the invention provides a kind of control method, control device and electronic installation.
The control method of embodiment of the present invention comprises the following steps:
First rate-determining steps, controls imaging device and adopts contrast formula focal modes to focus to obtain focus value (focusvalue, FV) waveform；
Judge step, it is judged that whether described FV waveform described upper inflection point occurs；And
Second rate-determining steps, controls described imaging device and adopts the focusing of auxiliary focusing pattern when upper inflection point does not occur in described FV waveform.
In some embodiments, described judgement step judges described upper inflection point do not occur when the fluctuating margin of described FV waveform is less than predetermined value.
In some embodiments, described imaging device includes camera lens and driving device, and described driving device is for driving described camera lens to move to multiple position successively from the initial position of focusing range to end position along the optical axis direction of described camera lens；
When described first rate-determining steps is positioned at each described position by processing described camera lens, the FV of the image of described imaging device output is to obtain described FV waveform；
Judge that described fluctuating margin is less than described predetermined value when described judgement step difference between described FV is less than described predetermined value.
In some embodiments, described judgement step judges described upper inflection point do not occur in described FV waveform monotonic increase or when successively decreasing.
In some embodiments, described imaging device includes camera lens and driving device, and described driving device is for driving described camera lens to move to multiple position successively from the initial position of focusing range to end position along the optical axis direction of described camera lens；
When described first rate-determining steps is positioned at each described position by processing described camera lens, the FV of the image of described imaging device output is to obtain described FV waveform；
Described judgement step judges that when described FV is gradually increased or reduces described FV described control method in some embodiments also includes:
Setting procedure, receives user and inputs to set described predetermined value.
In some embodiments, described auxiliary focusing pattern includes phase place focal modes or laser focal modes.
The control device of embodiment of the present invention includes:
First controls module, and described first controls module is used for controlling imaging device employing contrast formula focal modes focusing to obtain focus value (focusvalue, FV) waveform；
Judge module, described judge module is used for judging whether described FV waveform described upper inflection point occurs；And
Second controls module, and described second controls module adopts the focusing of auxiliary focusing pattern for controlling described imaging device when upper inflection point does not occur in described FV waveform.
In some embodiments, described judge module judges described upper inflection point do not occur when the fluctuating margin of described FV waveform is less than predetermined value.
In some embodiments, described imaging device includes camera lens and driving device, and described driving device is for driving described camera lens to move to multiple position successively from the initial position of focusing range to end position along the optical axis direction of described camera lens；
Described first controls module for the FV of the image of described imaging device output during by processing described camera lens and being positioned at each described position to obtain described FV waveform；
Judge when described judge module difference between described FV is less than described predetermined value that described fluctuating margin is less than described predetermined value.
In some embodiments, described judge module judges described upper inflection point do not occur in described FV waveform monotonic increase or when successively decreasing.
In some embodiments, described imaging device includes camera lens and driving device, and described driving device is for driving described camera lens to move to multiple position successively from the initial position of focusing range to end position along the optical axis direction of described camera lens；
Described first controls module for the FV of the image of described imaging device output during by processing described camera lens and being positioned at each described position to obtain described FV waveform；
Described judge module judges described FV waveform monotonic increase or successively decreases when described FV is gradually increased or reduces.
In some embodiments, described control device also includes:
Setting module, described setting module is used for receiving user and inputs to set described predetermined value.
In some embodiments, described auxiliary focusing pattern includes phase place focal modes or laser focal modes.
The electronic installation of embodiment of the present invention includes described imaging device and described control device.
In some embodiments, described electronic installation includes mobile phone or panel computer.
In some embodiments, described imaging device includes Front camera and/or rearmounted camera.
The control method of embodiment of the present invention, control device and electronic installation can successfully realize focusing by adopting auxiliary focusing pattern in the scene that some contrast is relatively low.
The additional aspect of embodiments of the present invention and advantage will part provide in the following description, and part will become apparent from the description below, or is recognized by the practice of embodiments of the present invention.
Accompanying drawing explanation
Above-mentioned and/or the additional aspect of embodiments of the present invention and advantage are from conjunction with will be apparent from easy to understand the accompanying drawings below description to embodiment, wherein:
Fig. 1 is the schematic flow sheet of the control method of embodiment of the present invention.
Fig. 2 be embodiment of the present invention imaging device and control device high-level schematic functional block diagram.
Fig. 3 is the FV waveform diagram of some embodiment of the present invention.
Fig. 4 is the FV waveform diagram of some embodiment of the present invention.
Fig. 5 is the FV waveform diagram of some embodiment of the present invention.
Fig. 6 be some embodiment of the present invention imaging device and control device high-level schematic functional block diagram.
Detailed description of the invention
Being described below in detail the embodiment of embodiments of the present invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of same or like function from start to finish.The embodiment described below with reference to accompanying drawing is illustrative of, and is only used for explaining embodiments of the present invention, and it is not intended that restriction to embodiments of the present invention.
Referring to Fig. 1, the control method of embodiment of the present invention comprises the following steps:
S10: control imaging device and adopt contrast formula focal modes to focus to obtain focus value (focusvalue, FV) waveform；
S20: judge whether FV waveform upper inflection point occurs；And
S30: do not occur that upper inflection point time control is formed as device and adopts the focusing of auxiliary focusing pattern at FV waveform.
Referring to Fig. 2, the control device 100 of embodiment of the present invention includes the first control module 110, judge module 120 and second controls module 130.The control method of embodiment of the present invention can be realized by the control device 100 of embodiment of the present invention.Wherein, step S10 can be controlled module 110 by first and realize, and step S20 can be realized by judge module 120, and step S30 can be controlled module 130 by second and realize.
In other words, first controls module 110 and is used for controlling imaging device 200 and adopts contrast formula focal modes to focus to obtain focus value (focusvalue, FV) waveform.Judge module 120 is used for judging whether FV waveform upper inflection point occurs.Second controls module 130 for not occurring that upper inflection point time control is formed as device 200 and adopts auxiliary focusing pattern to focus at FV waveform.
In contrast formula focusing technology, the data for phenogram image sharpness that focus value (focusvalue, FV) draws after usually the image of imaging device 200 output being processed.Usually, the contrast of focusing scene is more high, and the focus value (focusvalue, FV) of image is more high.Contrast formula focal modes by find image focusing value the highest time corresponding focusing position to realize focusing.
Referring to Fig. 3, the burnt process of seeking of contrast formula focal modes includes slightly searching process and carefully searching process.Slightly the process of searching is a search upper inflection point and determines the process carefully searching scope.First, by the camera lens 210 in control imaging device 200 to move by a relatively large margin to different focus position to obtain the focus value (focusvalue, FV) of correspondence.Then these focus value are carried out data fitting and obtain FV waveform.Finally, find the upper inflection point in FV waveform and the certain limit near upper inflection point is defined as carefully searching scope.Carefully the process of searching be by carefully search control camera lens 210 to move by a small margin to different focus position accurately to find FV for maximum in scope time corresponding focusing position and then realize focusing.
It should be noted that upper inflection point is contrast formula focal modes is slightly searching the obvious FV peak point searched out in process, and before and after upper inflection point, the focusing position of the FV corresponding less than upper inflection point in focusing range, can be found.Upper inflection point is it is not intended that slightly search maximum FV point in process.
Refer to Fig. 4, when the contrast of scene of focusing is relatively low, for instance in some half-light scene or pure color scene, FV excursion corresponding to different focus position is little.It is appreciated that now slightly the process of searching will be difficult to find that a upper inflection point, also cannot determine simultaneously and carefully search scope.Contrast formula focal modes will be unable to realize focusing in these scenes.
The control device 100 of embodiment of the present invention first pass through the first control module 110 control imaging device 200 adopt contrast formula focal modes focus to obtain focus value (focusvalue, FV) waveform.Then pass through judge module 120 and judge whether FV waveform upper inflection point occurs, do not occur that upper inflection point time control is formed as device 200 and adopts auxiliary focusing pattern to focus at FV waveform.
So, it is possible successfully to realize focusing in some low contrast scene.
In some embodiments, step S20 judges upper inflection point do not occur when the fluctuating margin of FV waveform is less than predetermined value.
In some embodiments, it is judged that module 120 is for judging upper inflection point do not occur when the fluctuating margin of FV waveform is less than predetermined value.
Being appreciated that in the scene that most of contrasts are relatively low, the FV of the image that imaging device 200 exports in different focus position changes within the specific limits.In other words, in the scene that contrast is relatively low, the fluctuating margin of accessed FV waveform is always less than certain value.Therefore can judge that upper inflection point does not occur in FV waveform when the fluctuating margin of FV waveform is less than predetermined value judging.
So, it is possible to judge whether FV waveform upper inflection point occurs.
In some embodiments, imaging device 200 includes camera lens 210 and driving device 220, and driving device 220 is for driving camera lens 210 to move to multiple position successively from the initial position of focusing range to end position along the optical axis direction of camera lens 210.
First rate-determining steps is positioned at the FV of image of the output of imaging device 200 during each position to obtain FV waveform by processing camera lens 210.
Judge when judging step difference between FV less than predetermined value that whether fluctuating margin is less than predetermined value.
In some embodiments, when the first control module 110 is for being positioned at each position by process camera lens 210, the FV of the image of imaging device 200 output is to obtain FV waveform.Judge module 120 judges that fluctuating margin is less than predetermined value when being used for the difference between FV less than predetermined value.
So, it is possible the difference by judging between FV whether less than predetermined value and then judge that whether fluctuating margin is less than predetermined value.
In some embodiments, step S20 judges upper inflection point do not occur in FV waveform monotonic increase or when successively decreasing.
In some embodiments, it is judged that module 120 judges upper inflection point do not occur when being used in FV waveform monotonic increase or successively decrease.
Referring to Fig. 5, in some special screne, for instance some is closely focused in scene, FV waveform presents monotonically increasing situation.Although now the fluctuating margin of the difference of FV FV waveform in other words is likely larger than predetermined value, but still can not find upper inflection point in FV waveform.Because FV waveform now presents monotonically increasing characteristic, slightly the process of searching can not find in FV waveform decline part thus can not find upper inflection point.
Judge that upper inflection point does not occur when therefore, it can in FV waveform monotonic increase or successively decrease.
In some embodiments, imaging device 200 includes camera lens 210 and driving device 220, and driving device 220 is for driving camera lens 210 to move to multiple position successively from the initial position of focusing range to end position along the optical axis direction of camera lens 210.
Step S10 is positioned at the FV of image of the output of imaging device 200 during each position to obtain FV waveform by processing camera lens 210.
Step S20 judges FV waveform monotonic increase or successively decreases when FV is gradually increased or reduces.
In some embodiments, when the first control module 110 is for being positioned at each position by process camera lens 210, the FV of the image of imaging device 200 output is to obtain FV waveform.Judge module 120 for judging FV waveform monotonic increase or successively decreasing when FV is gradually increased or reduces.
So, it is possible to by judging whether FV is gradually increased or is gradually reduced and then judge FV waveform whether monotonic increase or successively decrease.
In some embodiments, control method further comprises the steps of:
S40: receive user and input to set predetermined value.
Refer to Fig. 6, in some embodiments, control device 100 and also include setting module 140.Step S40 can be realized by setting module 140.In other words, setting module 140 is used for receiving user's input to set predetermined value.
Specifically, user can set predetermined value by the mode of touch screen or phonetic entry.
So, user can set predetermined value thus improving Consumer's Experience according to the use habit of oneself.
In some embodiments, auxiliary focusing pattern includes phase place focal modes or laser focal modes.
Under normal circumstances, low contrast scene affects little for phase place focal modes or laser focal modes.And the focusing speed of phase place focal modes and laser focal modes is than contrast formula focal modes block.Preferably, it is possible to adopting laser focal modes in in-plant half-light scene is auxiliary focusing pattern.Preferably, adopt phase place focal modes as auxiliary focusing pattern in light pure color scene.
The electronic installation of embodiment of the present invention, includes above-mentioned imaging device 200 and controls device 100.Specifically, imaging device 200 includes Front camera and/or rearmounted camera.Electronic installation includes mobile phone or panel computer.
Embodiment of the present invention control device 100 and the not deployed other parts of electronic installation, can refer to the corresponding part of the control method of embodiment of above, be no longer developed in details at this.
In the description of embodiments of the present invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", " outward ", " clockwise ", orientation or the position relationship of the instruction such as " counterclockwise " are based on orientation shown in the drawings or position relationship, it is for only for ease of description embodiments of the present invention and simplifies description, rather than the device of instruction or hint indication or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that restriction to embodiments of the present invention.Additionally, term " first ", " second " are only for descriptive purposes, and it is not intended that indicate or imply relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or implicitly include one or more described features.In the description of embodiments of the present invention, " multiple " are meant that two or more, unless otherwise expressly limited specifically.
In the description of embodiments of the present invention, it is necessary to explanation, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, for instance, it is possible to it is fixing connection, can also be removably connect, or connect integratedly；Can be mechanically connected, it is also possible to be electrical connection or can communication mutually；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, it is possible to be connection or the interaction relationship of two elements of two element internals.For the ordinary skill in the art, it is possible to understand above-mentioned term concrete meaning in embodiments of the present invention as the case may be.
In embodiments of the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or D score can include the first and second features and directly contact, it is also possible to include the first and second features and be not directly contact but by the other characterisation contact between them.And, fisrt feature second feature " on ", " top " and " above " include fisrt feature directly over second feature and oblique upper, or be merely representative of fisrt feature level height higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " include fisrt feature directly over second feature and oblique upper, or be merely representative of fisrt feature level height less than second feature.
Following disclosure provides many different embodiments or example for realizing the different structure of embodiments of the present invention.In order to simplify disclosing of embodiments of the present invention, hereinafter parts and setting to specific examples are described.Certainly, they are only merely illustrative, and are not intended to the restriction present invention.Additionally, embodiments of the present invention can in different examples repeat reference numerals and/or reference letter, this repetition is for purposes of simplicity and clarity, the relation between itself not indicating discussed various embodiment and/or arranging.Additionally, the example of the various specific technique that provides of embodiments of the present invention and material, but those of ordinary skill in the art are it can be appreciated that the use of the application of other techniques and/or other materials.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " exemplary embodiment ", " example ", " concrete example " or " some examples " etc. means in conjunction with described embodiment or example describe are contained at least one embodiment or the example of the present invention.In this manual, the schematic representation of above-mentioned term is not necessarily referring to identical embodiment or example.And, the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiments or example.
Describe in flow chart or in this any process described otherwise above or method and be construed as, represent and include the module of code of executable instruction of one or more step for realizing specific logical function or process, fragment or part, and the scope of the preferred embodiment of the present invention includes other realization, wherein can not press order that is shown or that discuss, including according to involved function by basic mode simultaneously or in the opposite order, performing function, this should be understood by embodiments of the invention person of ordinary skill in the field.
Represent in flow charts or in this logic described otherwise above and/or step, such as, it is considered the sequencing list of executable instruction for realizing logic function, may be embodied in any computer-readable medium, use for instruction execution system, device or equipment (such as computer based system, including the system of processing module or other can from instruction execution system, device or equipment instruction fetch the system performing instruction), or use in conjunction with these instruction execution systems, device or equipment.For the purpose of this specification, " computer-readable medium " can be any can comprise, store, communicate, propagate or transmission procedure is for instruction execution system, device or equipment or the device that uses in conjunction with these instruction execution systems, device or equipment.The example more specifically (non-exhaustive list) of computer-readable medium includes following: have the electrical connection section (electronic installation) of one or more wiring, portable computer diskette box (magnetic device), random access memory (RAM), read only memory (ROM), erasable edit read only memory (EPROM or flash memory), fiber device, and portable optic disk read only memory (CDROM).Additionally, computer-readable medium can even is that the paper that can print described program thereon or other suitable media, because can such as by paper or other media be carried out optical scanning, then carry out editing, interpreting or be processed to electronically obtain described program with other suitable methods if desired, be then stored in computer storage.
Should be appreciated that each several part of embodiments of the present invention can realize with hardware, software, firmware or their combination.In the above-described embodiment, multiple steps or method can realize with the storage software or firmware in memory and by suitable instruction execution system execution.Such as, if realized with hardware, the same in another embodiment, can realize by any one in following technology well known in the art or their combination: there is the discrete logic of logic gates for data signal realizes logic function, there is the special IC of suitable combination logic gate circuit, programmable gate array (PGA), field programmable gate array (FPGA) etc..
Those skilled in the art are appreciated that realizing all or part of step that above-described embodiment method carries can be by the hardware that program carrys out instruction relevant and complete, described program can be stored in a kind of computer-readable recording medium, this program upon execution, including the step one or a combination set of of embodiment of the method.
Additionally, each functional unit in various embodiments of the present invention can be integrated in a processing module, it is also possible to be that unit is individually physically present, it is also possible to two or more unit are integrated in a module.Above-mentioned integrated module both can adopt the form of hardware to realize, it would however also be possible to employ the form of software function module realizes.If described integrated module is using the form realization of software function module and as independent production marketing or use, it is also possible to be stored in a computer read/write memory medium.
Storage medium mentioned above can be read only memory, disk or CD etc..
Although above it has been shown and described that embodiments of the invention, it is understandable that, above-described embodiment is illustrative of, it is impossible to be interpreted as limitation of the present invention, and above-described embodiment can be changed, revises, replace and modification by those of ordinary skill in the art within the scope of the invention.
Claims (17)
1. a control method, it is characterised in that comprise the following steps:
First rate-determining steps, controls imaging device and adopts contrast formula focal modes to focus to obtain focus value (focusvalue, FV) waveform；
Judge step, it is judged that whether described FV waveform upper inflection point occurs；And
Second rate-determining steps, controls described imaging device and adopts the focusing of auxiliary focusing pattern when described upper inflection point does not occur in described FV waveform.
2. control method as claimed in claim 1, it is characterised in that described judgement step judges described upper inflection point do not occur when the fluctuating margin of described FV waveform is less than predetermined value.
3. control method as claimed in claim 2, it is characterized in that, described imaging device includes camera lens and driving device, and described driving device is for driving described camera lens to move to multiple position successively from the initial position of focusing range to end position along the optical axis direction of described camera lens；
When described first rate-determining steps is positioned at each described position by processing described camera lens, the FV of the image of described imaging device output is to obtain described FV waveform；
Judge that described fluctuating margin is less than described predetermined value when described judgement step difference between described FV is less than described predetermined value.
4. control method as claimed in claim 1, it is characterised in that described judgement step judges described upper inflection point do not occur in described FV waveform monotonic increase or when successively decreasing.
5. control method as claimed in claim 4, it is characterized in that, described imaging device includes camera lens and driving device, and described driving device is for driving described camera lens to move to multiple position successively from the initial position of focusing range to end position along the optical axis direction of described camera lens；
When described first rate-determining steps is positioned at each described position by processing described camera lens, the FV of the image of described imaging device output is to obtain described FV waveform；
Described judgement step judges described FV waveform monotonic increase or successively decreases when described FV is gradually increased or reduces.
6. the control method as described in claim 2-5 any one, it is characterised in that described control method also includes:
Setting procedure, receives user and inputs to set described predetermined value.
7. control method as claimed in claim 1, it is characterised in that described auxiliary focusing pattern includes phase place focal modes or laser focal modes.
8. one kind controls device, it is characterised in that including:
First controls module, and described first controls module is used for controlling imaging device employing contrast formula focal modes focusing to obtain focus value (focusvalue, FV) waveform；
First judge module, described first judge module is used for judging whether described FV waveform upper inflection point occurs；And
Second controls module, and described second controls module adopts the focusing of auxiliary focusing pattern for controlling described imaging device when described upper inflection point does not occur in described FV waveform.
9. control device as claimed in claim 8, it is characterised in that described first judge module is for judging described upper inflection point do not occur when the fluctuating margin of described FV waveform is less than predetermined value.
10. control device as claimed in claim 9, it is characterized in that, described imaging device includes camera lens and driving device, and described driving device is for driving described camera lens to move to multiple position successively from the initial position of focusing range to end position along the optical axis direction of described camera lens；Described control device includes:
Described first controls module for the FV of the image of described imaging device output during by processing described camera lens and being positioned at each described position to obtain described FV waveform；
Described first judge module judges that described fluctuating margin is less than described predetermined value when being used for the difference between described FV less than described predetermined value.
11. control device as claimed in claim 8, it is characterised in that judge that described upper inflection point does not occur when described first judge module is used in described FV waveform monotonic increase or successively decreases.
12. control device as claimed in claim 11, it is characterized in that, described imaging device includes camera lens and driving device, and described driving device is for driving described camera lens to move to multiple position successively from the initial position of focusing range to end position along the optical axis direction of described camera lens；
Described first controls module for the FV of the image of described imaging device output during by processing described camera lens and being positioned at each described position to obtain described FV waveform；
Described first judge module for judging described FV waveform monotonic increase or successively decreasing when described FV is gradually increased or reduces.
13. the control device as described in claim 9-12 any one, it is characterised in that described control device also includes:
Setting module, described setting module is used for receiving user and inputs to set described predetermined value.
14. control device as claimed in claim 8, it is characterised in that described auxiliary focusing pattern includes phase place focal modes or laser focal modes.
15. an electronic installation, it is characterised in that include described imaging device and the control device as described in claim 8-14 any one.
16. electronic installation as claimed in claim 15, it is characterised in that described electronic installation includes mobile phone or panel computer.
17. electronic installation as claimed in claim 15, it is characterised in that described imaging device includes Front camera and/or rearmounted camera.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107465880A (en) * | 2017-09-29 | 2017-12-12 | 广东欧珀移动通信有限公司 | Focusing method, device, terminal and computer-readable recording medium |
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Application publication date: 20160720 |