CN105681670A - Control method, control device and electronic device - Google Patents

Control method, control device and electronic device Download PDF

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Publication number
CN105681670A
CN105681670A CN201610115845.4A CN201610115845A CN105681670A CN 105681670 A CN105681670 A CN 105681670A CN 201610115845 A CN201610115845 A CN 201610115845A CN 105681670 A CN105681670 A CN 105681670A
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China
Prior art keywords
imaging device
control
control method
automatic exposure
focusing
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Granted
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CN201610115845.4A
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Chinese (zh)
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CN105681670B (en
Inventor
李小朋
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Priority to CN201610115845.4A priority Critical patent/CN105681670B/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60Control of cameras or camera modules
    • H04N23/67Focus control based on electronic image sensor signals
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B13/00Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
    • G03B13/32Means for focusing
    • G03B13/34Power focusing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70Circuitry for compensating brightness variation in the scene

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Studio Devices (AREA)

Abstract

The invention discloses a control method for controlling the focusing of an imaging device. The control method comprises the following steps: a processing step and a controlling step. The processing step comprises shortening the time of converging an automatic exposure value of the imaging device; and the controlling step comprises controlling the imaging device to switch to the careful searching from the coarse searching after the automatic exposure value is converged. Furthermore, the invention further discloses a control device and an electronic device. The control method, the control device and the electronic device of the execution mode of the invention can accelerate the triggering of the careful searching in the focusing process through the shortening of the time of converging the automatic exposure value. The switching of the coarse searching and the careful searching in the focusing process through the adoption of the phase focusing mode can be more smooth, and the user experience is improved.

Description

Control method, control device and electronic installation
Technical field
The present invention relates to imaging technique, particularly to a kind of control method, control device and electronic installation.
Background technology
Imaging device is easily occurred pause and transition in rhythm or melody in employing phase place focusing by when slightly searching and switch to and carefully search and focus, and Consumer's Experience is poor.
Summary of the invention
It is contemplated that at least solve one of technical problem of existence in prior art. For this, the present invention needs to provide a kind of control method, control device and electronic installation.
The control method of embodiment of the present invention, is used for controlling imaging device focusing, and described control method includes:
Process step, shorten the time that the automatic exposure value of described imaging device carries out restraining; And
Rate-determining steps, controls described imaging device after described automatic exposure value completes described convergence and carefully searches by slightly searching to switch to.
The control device of embodiment of the present invention, is used for controlling imaging device focusing, and described control device includes:
Processing module, described processing module carries out the time restrained for the automatic exposure value shortening described imaging device; And
First controls module, and described control module is carefully searched by slightly searching to switch to for controlling described imaging device after completing described convergence in described automatic exposure value.
The electronic installation of embodiment of the present invention, including imaging device and control device as above.
The control method of embodiment of the present invention, control device and electronic installation, be shortened by the time quickening focus process of automatic exposure value convergence the triggering carefully searched. Make, adopting phase place focal modes to carry out the process focused slightly is searched more smooth and easy with the switching carefully searched, to improve Consumer's Experience.
The advantage of the additional aspect of the present invention will part provide in the following description, and part will become apparent from the description below, or is recognized by the practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or the additional aspect 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 is the high-level schematic functional block diagram controlling device of embodiment of the present invention.
Fig. 3 is the view of the control method of embodiment of the present invention.
Fig. 4 is the schematic flow sheet of the control method of some embodiment of the present invention.
Fig. 5 is the high-level schematic functional block diagram controlling device of some embodiment of the present invention.
Fig. 6 is the view of the control method of some embodiment of the present invention.
Detailed description of the invention
Being described below in detail 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 from start to finish or has the element of same or like function.
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.
Refer to Fig. 1, the control method of embodiment of the present invention, it is used for controlling imaging device focusing. Control method comprises the following steps:
S10: the automatic exposure value of shortening imaging device carries out the time restrained; And
S20: control imaging device after automatic exposure value completes convergence and carefully search by slightly searching to switch to.
Referring to Fig. 2, the control device 100 of embodiment of the present invention includes processing module 10 and first and controls 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 can be applicable to electronic installation 1000, and electronic installation 1000 can include controlling device 100 and imaging device 200.
Wherein, the step S10 of the control method of embodiment of the present invention can be realized by processing module 10, and step S20 can be controlled module 20 by first and realize. In other words, processing module 10 carries out for the automatic exposure value shortening imaging device 200 time restrained, and first controls module 20 and carefully search by slightly searching to switch to for controlling imaging device 200 after automatic exposure value completes convergence.
User, when using imaging device 200 to carry out imaging, gathers picture signal by imageing sensor, and is displayed by display screen and check for user, and user adjusts the direction of imaging device 200, position thus adjustment is found a view. When imaging device 200 switching in different scenes, the automatic exposure value corresponding due to different scene images is different, therefore needs automatic exposure value is adjusted before focusing, could trigger the unlatching of focus operation after automatic exposure value restrains again. Such as being switched to light scene from dark scene, the automatic exposure value corresponding to each scene is different. And for example it is switched to nearly burnt scene from remote burnt scene.
Imaging device 200 includes imageing sensor, it is possible to gather image by imageing sensor, and imageing sensor can be linear transducer. Due to the focusing speed of phase place focal modes, imaging device 200 would generally adopt phase place focal modes as one of focusing mode. In phase place focus process, imaging device 200 obtains two images by imageing sensor, thus obtaining the image pixel waveform of the two image, and calculating the phase difference value between the two image pixel waveform, carrying out phase place focusing according to phase difference value. Concrete, in phase place focal modes, the pixel of imageing sensor includes left pixel and right pixel, thus when focusing, the image that acquired two the image respectively imageing sensors of imageing sensor are obtained by left pixel and right pixel.
The data waveform of two width images can be generated respectively according to the image obtained, crest and trough is there is due to waveform, therefore, imaging device 200 can calculate the phase difference value between two width images by the phase place between the crest of waveform and trough, only when phase contrast is zero, image the most clearly could be obtained, and when there is phase contrast between two width images, it is necessary to obtain image clearly by the form focused. Under phase place focal modes, the position of focus lens can be determined according to the phase contrast calculated, thus realizing focusing.
Refer to Fig. 3, the focus process of phase place focal modes generally includes slightly searches and carefully searches process, slightly search the position of the focus lens that process is usually determined according to computed phase contrast, focus lens is promoted to advance near this position by focusing motor with bigger step pitch, and carefully search process and usually promoted focus lens to find optimum position by focusing motor with relatively half step distance near this position, that is to say can the position of blur-free imaging. The size of focusing motor step pitch is controlled by the size of the pulse signal of electric current.
It is appreciated that owing to focus process includes slightly searching and carefully searching two parts, and the step pitch of focusing motor promotion focus lens is relatively big when slightly searching, and when carefully searching, step pitch is less. Thus when switching, often smoothness has obvious pause and transition in rhythm or melody sense not. Especially, due to carefully search influence whether focusing accurately and readability, therefore before carefully searching, that is to say by slightly search switch to carefully search time, wait that automatic exposure value has restrained just can switch over, so again result in the handoff procedure slightly searched and carefully search smooth and easy not.
The control method of embodiment of the present invention, when scene changes being shot, control imaging device 200 and carry out the convergence slightly searching and carrying out automatic exposure value of phase place focal modes, by processing time its shortening of chien shih of automatic exposure value convergence, thus accelerating carefully to search the triggering of process, thus shortening the time of whole focus process (including the convergence of automatic exposure value), accelerating focusing speed, improving the smooth degree of focus process.
In sum, the control method of embodiment of the present invention, control device 100 and electronic installation 1000, it is shortened by the time quickening focus process of automatic exposure value convergence the triggering carefully searched. Make, adopting phase place focal modes to carry out the process focused slightly is searched more smooth and easy with the switching carefully searched, to improve Consumer's Experience.
In some embodiments, electronic installation 1000 can be the electric terminal that mobile phone or panel computer etc. have camera function. And imaging device 200 includes preposition and/or rearmounted camera.
It is appreciated that electronic installation 1000 includes but not limited to the example of present embodiment.
In some embodiments, step S10 by reducing the time that imaging device obtains the frame number shortening convergence of preview image when automatic exposure value restrains.
In some embodiments, processing module 10 shortens the time of convergence for the frame number obtaining preview image when automatic exposure value restrains by reducing imaging device 200.
The convergence of automatic exposure value carries out usually by the preview image obtaining predetermined frame number, for instance can obtain 5 frame preview images in convergence process and detect, when automatic exposure value no longer changes it is believed that restrained. In the present embodiment, judge whether automatic exposure value completes the frame number of the required preview image of convergence and shorten the time that automatic exposure value completes to restrain by reducing, for instance be reduced to 3 frames by 5 frames. So, automatic exposure value convergence time can be shortened, that is to say to shorten and carefully search the required waiting time by slightly searching to switch to so that whole focus process is more smooth, improves Consumer's Experience.
Referring to Fig. 4, in some embodiments, control method includes step:
S30: control imaging device and obtain the focus value of preview image when carefully searching every predetermined frame number.
In such embodiment, predetermined frame number is more than a frame.
In such embodiment, control method includes step:
S40: control imaging device and complete focusing according to focus value.
Refer to Fig. 5, in some embodiments, control device 100 and include the second control module 30 and the 3rd control module 40. Step S30 can be controlled module 30 by second and realize. Step S40 can be controlled module 40 by the 3rd and realize. In other words, second controls module 30 for controlling imaging device 200 focus value every predetermined frame number acquisition preview image when carefully searching. 3rd control module is used for controlling imaging device 200 and completes focusing according to focus value.
The data for phenogram image sharpness that focus value 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 of image is more high. By find image focusing value the highest time corresponding focusing position to realize focusing.
Referring to Fig. 6, carefully searching in process, statistics focus lens carefully searches position each, that is to say the focus value of the two field picture of position that focusing motor drives focus lens often to take a step forward, thus find focus value maximum time corresponding focusing position and then realize focusing. Although relative to slightly searching, the step pitch carefully searched is less, but still has pause and transition in rhythm or melody sense.
In present embodiment, by reducing step pitch, the interval of the two field picture namely increasing the focus value obtaining preview image makes the process carefully searched more smooth and easy. Such as, when carefully searching, focusing motor drives focus lens often to walk 10 units of advance, and obtains the focus value of preview image, in present embodiment, step pitch is reduced into 5 units, but does not obtain the focus value of now preview image when advancing 5 units, remain in 10 unit places and obtain. In other words, obtaining the focus value of a frame preview image relative to 10 units of often advancing, with 5 units for a frame, every 2 frames obtain the focus value of a preview image, and owing to transition frames is inserted in centre, thus whole process is more smooth, experiences more.
It should be noted that the parasang advanced when carefully searching is only and schematically illustrates, in the same manner, interval frame number is also not necessarily limited to the frame number that present embodiment is disclosed.
Embodiment of the present invention control device 100 and not deployed other parts of electronic installation 1000, the corresponding part of the control method of embodiment of above can be joined, 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.
Above 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, above 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 (13)

1. a control method, is used for controlling imaging device focusing, it is characterised in that described control method includes:
Process step, shorten the time that the automatic exposure value of described imaging device carries out restraining; And
Rate-determining steps, controls described imaging device after described automatic exposure value completes described convergence and carefully searches by slightly searching to switch to.
2. control method as claimed in claim 1, it is characterised in that described process step by reducing the time that described imaging device obtains the frame number described convergence of shortening of preview image when described convergence.
3. control method as claimed in claim 1, it is characterised in that described control method includes:
Control described imaging device carry out described carefully search time every predetermined frame number obtain preview image focus value.
4. control method as claimed in claim 3, it is characterised in that described predetermined frame number is more than a frame.
5. control method as claimed in claim 3, it is characterised in that described control method includes:
Control described imaging device and complete described focusing according to described focus value.
6. control a device, be used for controlling imaging device focusing, it is characterised in that described control device includes:
Processing module, described processing module carries out the time restrained for the automatic exposure value shortening described imaging device; And
First controls module, and described control module is carefully searched by slightly searching to switch to for controlling described imaging device after completing described convergence in described automatic exposure value.
7. control device as claimed in claim 6, it is characterised in that described processing module shortens the time of described convergence for the frame number obtaining preview image when described convergence by reducing described imaging device.
8. control device as claimed in claim 6, it is characterised in that described control device includes:
Second control module, described second control module for control described imaging device carry out described carefully search time every predetermined frame number obtain preview image focus value.
9. control device as claimed in claim 8, it is characterised in that described predetermined frame number is more than a frame.
10. control device as claimed in claim 8, it is characterised in that described control device includes:
3rd controls module, and described 3rd control module is used for controlling described imaging device and completes described focusing according to described focus value.
11. an electronic installation, it is characterised in that include described imaging device and the control device as described in claim 6-10 any one.
12. electronic installation as claimed in claim 11, it is characterised in that described electronic installation includes mobile phone or panel computer.
13. electronic installation as claimed in claim 11, it is characterised in that described imaging device includes Front camera and/or rearmounted camera.
CN201610115845.4A 2016-02-29 2016-02-29 Control method, control device and electronic device Active CN105681670B (en)

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