CN104994274A - Rapid photographing method based on mobile terminal and mobile terminal - Google Patents
Rapid photographing method based on mobile terminal and mobile terminal Download PDFInfo
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- CN104994274A CN104994274A CN201510333098.7A CN201510333098A CN104994274A CN 104994274 A CN104994274 A CN 104994274A CN 201510333098 A CN201510333098 A CN 201510333098A CN 104994274 A CN104994274 A CN 104994274A
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Abstract
The invention discloses a rapid photographing method based on a mobile terminal and the mobile terminal. The rapid photographing method based on the mobile terminal comprises receiving a start instruction which is used to indicate and start a camera application of the mobile terminal, starting a preview data flow of the camera application in the background according to the start instruction, obtaining an image frame of the preview data flow, judging whether brightness of the image frame achieves a target brightness requirement, and, when the brightness of the image frame achieves the target brightness requirement, stopping the preview data flow in the background, and using the image frame of the preview data flow in photographing. Through the manner, a snapshot by utilizing the mobile terminal can be achieved, and user's usage experience is improved.
Description
Technical field
Field of mobile terminals of the present invention, is specifically related to a kind of method based on mobile terminal snapshots and mobile terminal.
Background technology
Along with popularizing of mobile terminal, the application of mobile terminal is more and more extensive, and its function also from strength to strength.
Camera function, as a critical function of mobile terminal, is also day by day subject to the favor of people.Utilize mobile terminal to take pictures, almost become a part for people's life.But current use mobile terminal carries out taking pictures and often runs into following problem: when a scene or certain object occur, think to take fast, but when mobile terminal camera application is in shooting standby condition, think that the scene of bat or object disappear.
Above situation, mainly following reason causes: general camera applications, before taking pictures, is all first open preview interface to be shown by image, and then is switched to high-resolution trap mode and takes pictures, and period exists a mode switch time.In addition, based on the existence of preview interface, a procedure of adaptation is had for making the eyes of user, the automatic exposure algorithm of camera applications normally controls camera sensor and passes the picture frame of coming from secretly tapering to object brightness to bright (or by bright to secretly), this process need general expends similar 300 ~ 500 milliseconds of times, and this is for when capturing fast being a huge time loss.
Summary of the invention
The technical problem that the present invention mainly solves is the snapshots how realizing mobile terminal.
In view of this, the embodiment of the present invention provides a kind of method based on mobile terminal snapshots and mobile terminal, can realize utilizing mobile terminal to capture fast, improves user's experience.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide a kind of method based on mobile terminal snapshots, described method comprises: receive enabled instruction, described enabled instruction is used to indicate the camera applications starting described mobile terminal; According to described enabled instruction, start the preview data stream of described camera applications on backstage; Obtain the picture frame of described preview data stream; Judge whether the brightness of described picture frame reaches object brightness requirement; When the brightness of described picture frame reaches the requirement of described object brightness, stop the described preview data stream on backstage, by the picture frame of described preview data stream as taking pictures.
Wherein, by the picture frame of described preview data stream as the step of taking pictures, comprising: the picture frame of described preview data stream is shown in screen, is switched to trap mode and takes pictures; Or the picture frame of described preview data stream is directly used in coding.
Wherein, described judge the brightness of described picture frame whether reach object brightness require step, comprise: the object brightness in the brightness of described picture frame and exposure control parameter is compared, when the brightness of described picture frame is identical with described object brightness, or the difference of the brightness of described picture frame and described object brightness is when preset range, judged result is that the brightness of described picture frame reaches object brightness requirement, otherwise, the brightness miss the mark brightness requirement of picture frame described in judged result.
Wherein, when the brightness of described picture frame do not arrive described object brightness require time, described method also comprises: according to brightness and the object brightness in exposure control parameter of described picture frame, calculates the signal gain and time for exposure that need to apply; According to described signal gain and time for exposure, adjust the brightness of described picture frame, make the brightness of described picture frame reach described object brightness requirement.
Wherein, described according to described enabled instruction, start the preview data stream of described camera applications on backstage while, also comprise: forbid auto-focusing, and receive control command, the camera lens controlling described camera applications according to described control command is focused to infinity, and described infinity is the distance beyond described lens focus.
For solving the problems of the technologies described above, another technical solution used in the present invention is: provide a kind of mobile terminal, described mobile terminal comprises receiver module, starts module, acquisition module, judge module and photo module, wherein: described receiver module is for receiving enabled instruction, and described enabled instruction is used to indicate the camera applications starting described mobile terminal; Described startup module is used for according to described enabled instruction, starts the preview data stream of described camera applications on backstage; Described acquisition module is for obtaining the picture frame of described preview data stream; Described judge module is for judging whether the brightness of described picture frame reaches object brightness requirement; Described photo module is used for, and when the brightness of described picture frame reaches object brightness requirement, stops the described preview data stream on backstage, by the picture frame of described preview data stream as taking pictures.
Wherein, described photo module is used for the picture frame of described preview data stream to be shown in screen, is switched to trap mode and takes pictures; Or described photo module is used for the picture frame of described preview data stream to be directly used in coding.
Wherein, described judge module is used for the object brightness in the brightness of described picture frame and exposure control parameter to compare, when the brightness of described picture frame is identical with described object brightness, or the difference of the brightness of described picture frame and described object brightness is when preset range, judged result is that the brightness of described picture frame reaches object brightness requirement, otherwise, the brightness miss the mark brightness requirement of picture frame described in judged result.
Wherein, described mobile terminal also comprises adjusting module, described adjusting module is used for, when the brightness miss the mark brightness requirement of described picture frame, according to the object brightness in the brightness of described picture frame and exposure control parameter, calculate the signal gain and time for exposure that need application, according to described signal gain and time for exposure, adjust the brightness of described picture frame, make the brightness of described picture frame reach described object brightness requirement.
Wherein, described receiver module is also for receiving control command, described mobile terminal also comprises control module, described control module is used for control and forbids auto-focusing, the camera lens controlling described camera applications according to described control command is focused to infinity, and described infinity is the distance beyond described lens focus.
The invention has the beneficial effects as follows: the situation being different from prior art, the present invention is when receiving the instruction starting camera applications, preview data stream is set up on backstage, by obtaining the picture frame of backstage preview data stream, compare with object brightness, when the picture frame of backstage preview data stream reaches object brightness requirement, stop backstage preview data stream, by the picture frame of preview data stream directly as taking pictures.By such mode, the present invention can realize utilizing mobile terminal to realize snapshots, meets the candid photograph demand of user, promotes user's experience.
Accompanying drawing explanation
Fig. 1 is the flow chart of a kind of method based on mobile terminal snapshots that the embodiment of the present invention provides;
Fig. 2 is the structural representation of a kind of mobile terminal that the embodiment of the present invention provides.
Embodiment
Refer to Fig. 1, Fig. 1 is the flow chart of a kind of method based on mobile terminal snapshots that the embodiment of the present invention provides, and as shown in the figure, the method based on mobile terminal snapshots of the embodiment of the present invention comprises:
S101: receive enabled instruction.
In the embodiment of the present invention, enabled instruction is used to indicate the camera applications starting mobile terminal.Wherein, the enabled instruction instruction that can be user be triggered by specific keys or specific button or other mode and produced.Such as user can trigger startup camera applications by long by volume key.
S102: according to enabled instruction, starts the preview data stream of camera applications on backstage.
After receiving enabled instruction, mobile terminal, according to enabled instruction, does not show preview interface, only sets up preview data stream on backstage.Namely the data flow that preview data flows to display interface is cut off.
The preferred implementation of one as the embodiment of the present invention, method of the present invention also comprises: start the preview data stream of camera applications on backstage while, forbid auto-focusing, and receive control command, the camera lens controlling camera applications according to control command is focused to infinity, and described infinity is the distance beyond lens focus.
Because the object of snapshots, in most cases all for beyond 2 ~ 3 meters, therefore, by camera lens directly being adjusted to the state of infinity focusing, thus the time of auto-focusing can be saved.The focusing of so-called infinity instigates the lens focusing of camera to be focused apart from the object of distance in addition.Therefore, infinity is a relative probability with the lens focus of camera applications, and the distance being only greater than lens focus can be infinity.Such as mobile phone camera is infinity beyond major part definition 3 meters.
In specific implementation, shift camera lens onto infinity particular by motor.
S103: the picture frame obtaining preview data stream.
On backstage, obtain the picture frame of preview data stream, and calculate the brightness of the picture frame of preview data stream.
S104: judge whether the brightness of picture frame reaches object brightness requirement.
According to the brightness of the picture frame of preview data stream, judge whether the brightness of the picture frame of preview data stream reaches object brightness requirement.
Wherein, in embody rule process, concrete deterministic process comprises: the object brightness in the brightness of picture frame and exposure control parameter compared, when the brightness of picture frame is identical with object brightness, or the brightness of picture frame and the difference of object brightness are in preset range, judged result is that the brightness of picture frame reaches object brightness requirement, otherwise judged result is the brightness miss the mark brightness requirement of picture frame.
When the brightness of picture frame reaches object brightness requirement, perform S105, otherwise, execution S106 and afterwards step.
S105: the preview data stream stopping backstage, by the picture frame of preview data stream as taking pictures.
When the brightness of the picture frame of preview data stream reaches object brightness requirement, stop the preview data stream on backstage, by the picture frame of preview data stream as taking pictures.
Wherein, during specific implementation, the picture frame of preview data stream is comprised as taking pictures:
The picture frame of preview data stream is shown in screen, is switched to trap mode and takes pictures.Or directly the picture frame of preview data stream is used for coding.
S106: according to the object brightness in the brightness of picture frame and exposure control parameter, calculates the signal gain and time for exposure that need application.
If the picture frame of preview data stream does not reach object brightness requirement, then according to the object brightness in the image frame brightness of preview data stream and exposure control parameter, calculate the signal gain and time for exposure that need application, wherein, signal gain and digital signal multiplication factor.
S107: according to signal gain and time for exposure, the brightness of adjustment picture frame, makes the brightness of picture frame reach object brightness requirement.
According to signal gain and time for exposure, the image frame brightness of preview data stream is controlled to reach object brightness requirement fast.Wherein, the picture frame of preview data stream controls to reach object brightness requirement, can be consistent with object brightness, or close with object brightness (namely both differences are at preset range).By the picture frame after adjustment brightness as taking pictures.
By such mode, effectively can saving the progressively control signal gain into adapting to human eye experience and time for exposure, making image brightness control to fade to the time of object brightness, thus the exposure of picture frame can be made can to become accurate fast, being directly used for taking pictures.
The method based on mobile terminal snapshots that the invention described above embodiment provides, be different from and set up preview data stream when tradition is taken pictures and the way showing preview interface, when needs are taken pictures, do not show preview interface, the preview data stream of camera applications is directly set up on backstage, the picture frame of preview data stream is obtained by backstage, the brightness of calculating chart picture frame, and compare with object brightness, when the brightness of picture frame reaches object brightness requirement, directly take pictures with the picture frame of this preview data stream.If the image frame brightness of preview data stream does not reach object brightness requirement, according to object brightness, the brightness of picture frame can be controlled to reach object brightness requirement fast, then directly take pictures with the picture frame after adjustment brightness.By such mode, the present invention can effectively save into adapt to human eye experience the gain of progressively control signal and the time for exposure, make image brightness control to fade to the time of object brightness, thus the exposure of picture frame can be made can to become accurate fast, be directly used for taking pictures.Thus can be good at meeting user and capture demand, promote user's experience.
In addition, method of the present invention, while preview data stream is set up on backstage, also forbids auto-focusing, controls camera lens focus to infinity by control command.Thus save the time of auto-focusing further, reach the object of snapshots.
Refer to Fig. 2, Fig. 2 is the structural representation of a kind of mobile terminal that the embodiment of the present invention provides, the mobile terminal that the present embodiment provides is for performing the method based on mobile terminal snapshots shown in above-mentioned Fig. 1, as shown in the figure, the mobile terminal 100 of the present embodiment comprises receiver module 11, starts module 12, acquisition module 13, judge module 14 and photo module 15, wherein:
Receiver module 11 is for receiving enabled instruction, and enabled instruction is used to indicate the camera applications starting mobile terminal.
In the embodiment of the present invention, enabled instruction is used to indicate the camera applications starting mobile terminal.Wherein, the enabled instruction instruction that can be user be triggered by specific keys or specific button or other mode and produced.Such as user can trigger startup camera applications by long by volume key.
Start module 12 for according to enabled instruction, start the preview data stream of camera applications on backstage.
After receiving enabled instruction, start module 12 according to enabled instruction, do not show preview interface, only set up preview data stream on backstage.Namely the data flow that preview data flows to display interface is cut off.
Please continue to refer to Fig. 2, as the preferred implementation of one, the mobile terminal 100 of the present embodiment also comprises control module 16, wherein:
Receiver module 11, while startup module 12 starts the preview data stream of camera applications, receives control command;
Control module 16 forbids auto-focusing for controlling, and focuses to infinity according to the camera lens of control command control camera applications, and infinity is the distance beyond lens focus.
Because the object of snapshots, in most cases all for beyond 2 ~ 3 meters, therefore, by camera lens directly being adjusted to the state of infinity focusing, thus the time of auto-focusing can be saved.The focusing of so-called infinity instigates the lens focusing of camera to be focused apart from the object of distance in addition.Therefore, infinity is a relative probability with the lens focus of camera applications, and the distance being only greater than lens focus can be infinity.Such as mobile phone camera is infinity beyond major part definition 3 meters.
In specific implementation, shift camera lens onto infinity particular by motor.
Acquisition module 13 is for obtaining the picture frame of preview data stream.
Acquisition module 13 obtains the picture frame of preview data stream on backstage, and calculates the brightness of the picture frame of preview data stream.
Judge module 14 is for judging whether the brightness of picture frame reaches object brightness requirement.
Judge module 14, according to the brightness of the picture frame of preview data stream, judges whether the brightness of the picture frame of preview data stream reaches object brightness requirement.
Wherein, in embody rule process, concrete deterministic process comprises: the object brightness in the brightness of picture frame and exposure control parameter compared, when the brightness of picture frame is identical with object brightness, or the brightness of picture frame and the difference of object brightness are in preset range, judged result is that the brightness of picture frame reaches object brightness requirement, otherwise judged result is the brightness miss the mark brightness requirement of picture frame.
Wherein, when the brightness of picture frame reaches object brightness requirement, notice photo module 15.
Photo module 15 for, the brightness of picture frame reach object brightness require time, stop the preview data stream on backstage, by the picture frame of preview data stream as taking pictures.
When the brightness of the picture frame of preview data stream reaches object brightness requirement, photo module 15 stops the preview data stream on backstage, by the picture frame of preview data stream as taking pictures.
Wherein, during specific implementation, the picture frame of preview data stream is comprised as taking pictures:
The picture frame of preview data stream is shown in screen, is switched to trap mode and takes pictures.Or directly the picture frame of preview data stream is used for coding.
Please continue to refer to Fig. 2, the mobile terminal of the present embodiment also comprises adjusting module 17, wherein, adjusting module 17 for, when the brightness miss the mark brightness requirement of picture frame, according to the object brightness in the brightness of picture frame and exposure control parameter, calculate the signal gain and time for exposure that need application, according to signal gain and time for exposure, the brightness of adjustment picture frame, reaches object brightness requirement to make the brightness of picture frame.
When the picture frame of preview data stream does not reach object brightness requirement, adjusting module 17 is according to the object brightness in the image frame brightness of preview data stream and exposure control parameter, calculate the signal gain and time for exposure that need application, wherein, signal gain and digital signal multiplication factor.
According to signal gain and time for exposure, the image frame brightness of preview data stream is controlled to reach object brightness requirement fast.Wherein, the picture frame of preview data stream controls to reach object brightness requirement, can be consistent with object brightness, or close with object brightness (namely both differences are at preset range).By the picture frame after adjustment brightness as taking pictures.
By such mode, effectively can saving the progressively control signal gain into adapting to human eye experience and time for exposure, making image brightness control to fade to the time of object brightness, thus the exposure of picture frame can be made can to become accurate fast, being directly used for taking pictures.
It is more than the detailed description of the method for the mobile terminal that provides of the embodiment of the present invention and snapshots thereof, be appreciated that, the present invention is different from and sets up preview data stream when tradition is taken pictures and the way showing preview interface, when needs are taken pictures, do not show preview interface, the preview data stream of camera applications is directly set up on backstage, the picture frame of preview data stream is obtained by backstage, the brightness of calculating chart picture frame, and compare with object brightness, when the brightness of picture frame reaches object brightness requirement, directly take pictures with the picture frame of this preview data stream.If the image frame brightness of preview data stream does not reach object brightness requirement, according to object brightness, the brightness of picture frame can be controlled to reach object brightness requirement fast, then directly take pictures with the picture frame after adjustment brightness.By such mode, the present invention can effectively save into adapt to human eye experience the gain of progressively control signal and the time for exposure, make image brightness control to fade to the time of object brightness, thus the exposure of picture frame can be made can to become accurate fast, be directly used for taking pictures.Thus can be good at meeting user and capture demand, promote user's experience.
In addition, method of the present invention, while preview data stream is set up on backstage, also forbids auto-focusing, controls camera lens focus to infinity by control command.Thus save the time of auto-focusing further, reach the object of snapshots.
In several embodiment provided by the present invention, should be understood that, disclosed system, apparatus and method, can realize by another way.Such as, device embodiment described above is only schematic, such as, the division of described module or unit, be only a kind of logic function to divide, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of device or unit or communication connection can be electrical, machinery or other form.
The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form of SFU software functional unit also can be adopted to realize.
If described integrated unit using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in a computer read/write memory medium.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words or all or part of of this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) or processor (processor) perform all or part of step of method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, portable hard drive, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. various can be program code stored medium.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. based on a method for mobile terminal snapshots, it is characterized in that, described method comprises:
Receive enabled instruction, described enabled instruction is used to indicate the camera applications starting described mobile terminal;
According to described enabled instruction, start the preview data stream of described camera applications on backstage;
Obtain the picture frame of described preview data stream;
Judge whether the brightness of described picture frame reaches object brightness requirement;
When the brightness of described picture frame reaches the requirement of described object brightness, stop the described preview data stream on backstage, by the picture frame of described preview data stream as taking pictures.
2. method according to claim 1, is characterized in that, by the picture frame of described preview data stream as the step of taking pictures, comprising:
The picture frame of described preview data stream is shown in screen, is switched to trap mode and takes pictures; Or
The picture frame of described preview data stream is directly used in coding.
3. method according to claim 1, is characterized in that, described judge the brightness of described picture frame whether reach object brightness require step, comprising:
Object brightness in the brightness of described picture frame and exposure control parameter is compared, when the brightness of described picture frame is identical with described object brightness, or the difference of the brightness of described picture frame and described object brightness is when preset range, judged result is that the brightness of described picture frame reaches object brightness requirement, otherwise, the brightness miss the mark brightness requirement of picture frame described in judged result.
4. method according to claim 1, is characterized in that, when the brightness of described picture frame does not arrive the requirement of described object brightness, described method also comprises:
According to the object brightness in the brightness of described picture frame and exposure control parameter, calculate the signal gain and time for exposure that need application;
According to described signal gain and time for exposure, adjust the brightness of described picture frame, make the brightness of described picture frame reach described object brightness requirement.
5. method according to claim 1, is characterized in that, described according to described enabled instruction, while starting the preview data stream of described camera applications, also comprises on backstage:
Forbid auto-focusing, and receive control command, the camera lens controlling described camera applications according to described control command is focused to infinity, and described infinity is the distance beyond described lens focus.
6. a mobile terminal, is characterized in that, described mobile terminal comprises receiver module, starts module, acquisition module, judge module and photo module, wherein:
Described receiver module is for receiving enabled instruction, and described enabled instruction is used to indicate the camera applications starting described mobile terminal;
Described startup module is used for according to described enabled instruction, starts the preview data stream of described camera applications on backstage;
Described acquisition module is for obtaining the picture frame of described preview data stream;
Described judge module is for judging whether the brightness of described picture frame reaches object brightness requirement;
Described photo module is used for, and when the brightness of described picture frame reaches object brightness requirement, stops the described preview data stream on backstage, by the picture frame of described preview data stream as taking pictures.
7. mobile terminal according to claim 6, is characterized in that, described photo module is used for the picture frame of described preview data stream to be shown in screen, is switched to trap mode and takes pictures; Or
Described photo module is used for the picture frame of described preview data stream to be directly used in coding.
8. mobile terminal according to claim 6, it is characterized in that, described judge module is used for the object brightness in the brightness of described picture frame and exposure control parameter to compare, when the brightness of described picture frame is identical with described object brightness, or the difference of the brightness of described picture frame and described object brightness is when preset range, judged result is that the brightness of described picture frame reaches object brightness requirement, otherwise, the brightness miss the mark brightness requirement of picture frame described in judged result.
9. mobile terminal according to claim 6, it is characterized in that, described mobile terminal also comprises adjusting module, described adjusting module is used for, when the brightness miss the mark brightness requirement of described picture frame, according to the object brightness in the brightness of described picture frame and exposure control parameter, calculate the signal gain and time for exposure that need application, according to described signal gain and time for exposure, adjust the brightness of described picture frame, make the brightness of described picture frame reach described object brightness requirement.
10. mobile terminal according to claim 6, it is characterized in that, described receiver module is also for receiving control command, described mobile terminal also comprises control module, described control module is used for control and forbids auto-focusing, the camera lens controlling described camera applications according to described control command is focused to infinity, and described infinity is the distance beyond described lens focus.
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Application publication date: 20151021 |