CN106303273A

CN106303273A - A kind of mobile terminal and camera control method thereof

Info

Publication number: CN106303273A
Application number: CN201610619464.XA
Authority: CN
Inventors: 王林贵
Original assignee: Nubia Technology Co Ltd
Current assignee: Shenzhen Zte Mobile Software Co Ltd; Nubia Technology Co Ltd
Priority date: 2016-07-29
Filing date: 2016-07-29
Publication date: 2017-01-04
Anticipated expiration: 2036-07-29
Also published as: CN106303273B

Abstract

The invention discloses a kind of mobile terminal, described mobile terminal includes: detector unit, is used for detecting front-facing camera and post-positioned pick-up head is opened the most simultaneously；Acquiring unit, for obtaining the first photometric data of post-positioned pick-up head；Light filling unit, for regulating the light value of the picture of finding a view of described front-facing camera based on described first photometric data；Control unit, takes pictures to described picture of finding a view based on the light value after regulation for controlling described front-facing camera.The present invention further simultaneously discloses a kind of camera control method.Use technical scheme, can solve to use front-facing camera to take pictures when taking pictures the problem of weak effect in the environment of light is too stronger than dark or light, the effect of taking pictures of raising front-facing camera, the experience of lifting user.

Description

Mobile terminal and photographing control method thereof

Technical Field

The invention relates to the technical field of photographing, in particular to a mobile terminal and a photographing control method thereof.

Background

With the development of mobile terminals, mobile terminals have become an essential life tool in daily life. When the user uses mobile terminal, there is such use scene, because surrounding environment is too dark, lead to when the user uses leading camera to shoot under the environment that light is darker, often the effect of shooing is relatively poor, like when the user carries out the auto heterodyne in scenes such as darker indoor or cave, the photo effect that often shoots out is also relatively dark, can't satisfy user's demand.

Disclosure of Invention

In view of this, the present invention is expected to provide a mobile terminal and a photographing control method thereof, which can solve the problem of poor photographing effect when a front-facing camera is used for photographing in an environment with dark light, improve the photographing effect of the front-facing camera, and improve the use experience of a user.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

the present invention provides a mobile terminal, comprising:

the detection unit is used for detecting whether the front camera and the rear camera are simultaneously started;

the acquisition unit is used for acquiring first photometric data of the rear camera;

the light supplementing unit is used for adjusting the photometric value of a framing picture acquired by the front camera based on the first photometric data;

and the control unit is used for controlling the front camera to photograph in the framing picture based on the adjusted photometric value.

In the foregoing solution, optionally, the mobile terminal further includes:

the judging unit is used for judging whether the current ambient light brightness of the display screen of the mobile terminal in the direction facing the direction, which is measured by the front camera, is lower than a first preset brightness threshold value or not after the detecting unit detects that the front camera and the rear camera are simultaneously started; if the brightness is lower than the first preset brightness threshold value, the rear camera is informed to measure first photometric data; and/or judging whether the current ambient light brightness of the display screen of the mobile terminal in the direction of the display screen, which is measured by the front camera, is higher than a second preset brightness threshold value; and if the brightness is higher than the second preset brightness threshold value, the rear camera is informed to measure first photometric data.

In the foregoing scheme, optionally, the light supplement unit is further configured to:

automatically feeding back the first photometric data to a framing picture of the front camera;

and performing photometric positioning on the view-finding picture by using the first photometric data to ensure that the photometric data according to the image shot by the front camera is consistent with the first photometric data measured by the rear camera.

when a first operation is detected, acquiring a first area in a framing picture of the rear camera determined according to the first operation; wherein the first operation is to instruct determination of second photometric data according to an input operation;

acquiring second photometric data corresponding to the first area from the first photometric data;

and performing photometric positioning on a framing picture of the front camera by using the second photometric data, so that the photometric data according to the image shot by the front camera is consistent with the second photometric data.

In the foregoing solution, optionally, the mobile terminal further includes:

the display unit is used for simultaneously displaying the framing picture of the front camera and the framing picture of the rear camera on a display screen; and displaying a framing picture of the rear camera in the light measuring frame corresponding to the front camera, and selecting a first area of the framing picture of the rear camera by moving the light measuring frame.

The invention also provides a photographing control method, which is applied to the mobile terminal and comprises the following steps:

when the front camera and the rear camera are detected to be opened simultaneously,

acquiring first photometric data of a rear camera;

and adjusting the photometric value of a framing picture acquired by the front camera based on the first photometric data, and taking pictures in the framing picture.

In the foregoing solution, optionally, after it is detected that the front camera and the rear camera are simultaneously turned on, the method further includes:

judging whether the current ambient light brightness of the display screen of the mobile terminal in the direction of the display screen, which is measured by the front camera, is lower than a first preset brightness threshold value or not;

and if the brightness is lower than the first preset brightness threshold value, the rear camera is informed to measure first photometric data.

And/or

Judging whether the current ambient light brightness of the display screen of the mobile terminal in the direction facing the direction, which is measured by the front camera, is higher than a second preset brightness threshold value or not;

and if the brightness is higher than the second preset brightness threshold value, the rear camera is informed to measure first photometric data.

In the foregoing solution, optionally, the adjusting a photometric value of a viewfinder frame acquired by a front camera based on the first photometric data includes:

when the first operation is detected, simultaneously displaying a framing picture of the front camera and a framing picture of the rear camera on a display screen; wherein the first operation is to instruct determination of second photometric data according to an input operation;

acquiring a first area in a framing picture of the rear camera determined according to the first operation;

In the foregoing scheme, optionally, the method further includes:

and displaying a framing picture of the rear camera in the light measuring frame corresponding to the front camera, and selecting a first area of the framing picture of the rear camera by moving the light measuring frame.

The invention provides a mobile terminal and a photographing control method thereof.A first photometric data of a rear camera is obtained when a front camera and the rear camera are detected to be simultaneously started; adjusting a photometric value of a framing picture of the front camera based on the first photometric data; controlling the front camera to photograph in the framing picture based on the adjusted photometric value; so, based on first photometry data is shooed in to leading camera's the frame of finding a view picture, has solved at least and has used leading camera to shoot the poor problem of photographic effect when environment that light is darker or light is too strong under using, improves leading camera's photographic effect, promotes user's use and experiences.

Drawings

Fig. 1 is a schematic hardware configuration diagram of an alternative mobile terminal implementing various embodiments of the present invention;

FIG. 2 is a diagram of a wireless communication system for the mobile terminal shown in FIG. 1;

fig. 3 is a first schematic flow chart illustrating an implementation of the photographing control method according to the embodiment of the present invention;

fig. 4 is a schematic diagram of an implementation flow of the photographing control method according to the embodiment of the present invention;

fig. 5 is a schematic diagram of starting a default application according to an embodiment of the present invention;

fig. 6 is a schematic diagram illustrating a rear camera performing light supplement on a framing picture of a front camera based on overall photometric data according to an embodiment of the present invention;

fig. 7 is a schematic diagram illustrating a rear camera performing light supplement on a viewfinder frame of a front camera based on photometric data of a local area according to an embodiment of the present invention;

fig. 8 is a first schematic structural diagram of a mobile terminal according to an embodiment of the present invention;

fig. 9 is a schematic diagram of a composition structure of a mobile terminal according to an embodiment of the present invention.

Detailed Description

So that the manner in which the features and aspects of the embodiments of the present invention can be understood in detail, a more particular description of the embodiments of the invention, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings.

A terminal implementing various embodiments of the present invention will now be described with reference to the accompanying drawings. In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the description of the embodiments of the present invention, and have no specific meaning in themselves. Thus, "module", "component" or "unit" may be used mixedly.

The terminal may be implemented in various forms. For example, the terminal described in the embodiments of the present invention may include terminals such as a mobile phone, a smart phone, a notebook computer, a digital broadcast receiver, a Personal Digital Assistant (PDA), a tablet computer (PAD), a Portable Multimedia Player (PMP), a navigation device, and the like, and fixed terminals such as a digital TV, a desktop computer, and the like. In the following, it is assumed that the terminal is a mobile terminal. However, it will be understood by those skilled in the art that the configuration according to the embodiment of the present invention can be applied to a fixed type terminal in addition to elements particularly used for moving purposes.

Fig. 1 is a schematic hardware configuration of a mobile terminal implementing various embodiments of the present invention.

The mobile terminal 100 may include an audio/video (a/V) input unit 120, a user input unit 130, an output unit 150, a memory 160, an interface unit 170, a controller 180, and a power supply unit 190, and the like. Fig. 1 illustrates a mobile terminal having various components, but it is to be understood that not all illustrated components are required to be implemented. More or fewer components may alternatively be implemented. Elements of the mobile terminal will be described in detail below.

The a/V input unit 120 is used to receive an audio or video signal. The a/V input unit 120 may include a camera 121 and a microphone 1220, and the camera 121 processes image data of still pictures or video obtained by an image capturing apparatus in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 151. The image frames processed by the camera 121 may be stored in the memory 160 (or other storage medium), and two or more cameras 1210 may be provided according to the construction of the mobile terminal. The microphone 122 may receive sounds (audio data) via the microphone in a phone call mode, a recording mode, a voice recognition mode, or the like, and can process such sounds into audio data. The microphone 122 may implement various types of noise cancellation (or suppression) algorithms to cancel (or suppress) noise or interference generated in the course of receiving and transmitting audio signals.

The user input unit 130 may generate key input data according to a command input by a user to control various operations of the mobile terminal. The user input unit 130 allows a user to input various types of information, and may include a keyboard, dome sheet, touch pad (e.g., a touch-sensitive member that detects changes in resistance, pressure, capacitance, and the like due to being touched), scroll wheel, joystick, and the like. In particular, when the touch pad is superimposed on the display unit 151 in the form of a layer, a touch screen may be formed.

The interface unit 170 serves as an interface through which at least one external device is connected to the mobile terminal 100. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The identification Module may store various information for authenticating a User using the mobile terminal 100 and may include a User Identity Module (UIM), a Subscriber Identity Module (SIM), a Universal Subscriber Identity Module (USIM), and the like. In addition, a device having an identification module (hereinafter, referred to as an "identification device") may take the form of a smart card, and thus, the identification device may be connected with the mobile terminal 100 via a port or other connection means. The interface unit 170 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the mobile terminal 100 or may be used to transmit data between the mobile terminal and the external device.

In addition, when the mobile terminal 100 is connected with an external cradle, the interface unit 170 may serve as a path through which power is supplied from the cradle to the mobile terminal 100 or may serve as a path through which various command signals input from the cradle are transmitted to the mobile terminal. Various command signals or power input from the cradle may be used as signals for recognizing whether the mobile terminal is accurately mounted on the cradle. The output unit 150 is configured to provide output signals (e.g., audio signals, video signals, alarm signals, vibration signals, etc.) in a visual, audio, and/or tactile manner. The output unit 150 may include a display unit 151, an audio output module 152, an alarm unit 153, and the like.

The display unit 151 may display information processed in the mobile terminal 100. For example, when the mobile terminal 100 is in a phone call mode, the display unit 151 may display a User Interface (UI) or a Graphical User Interface (GUI) related to a call or other communication (e.g., text messaging, multimedia file downloading, etc.). When the mobile terminal 100 is in a video call mode or an image capturing mode, the display unit 151 may display a captured image and/or a received image, a UI or GUI showing a video or an image and related functions, and the like.

Meanwhile, when the display unit 151 and the touch pad are overlapped with each other in the form of a layer to form a touch screen, the display unit 151 may serve as an input device and an output device. The Display unit 151 may include at least one of a Liquid Crystal Display (LCD), a Thin Film Transistor LCD (TFT-LCD), an Organic Light-Emitting Diode (OLED) Display, a flexible Display, a three-dimensional (3D) Display, and the like. Some of these displays may be configured to be transparent to allow a user to see from the outside, which may be referred to as transparent displays, and a typical transparent display may be, for example, a Transparent Organic Light Emitting Diode (TOLED) display or the like. Depending on the particular desired implementation, the mobile terminal 100 may include two or more display units (or other display devices), for example, the mobile terminal may include an external display unit (not shown) and an internal display unit (not shown). The touch screen may be used to detect a touch input pressure as well as a touch input position and a touch input area.

The audio output module 152 may convert audio data received by the wireless communication unit 110 or stored in the memory 160 into an audio signal and output as sound when the mobile terminal is in a call signal reception mode, a call mode, a recording mode, a voice recognition mode, a broadcast reception mode, or the like. Also, the audio output module 152 may provide audio output related to a specific function performed by the mobile terminal 100 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output module 152 may include a speaker, a buzzer, and the like.

The alarm unit 153 may provide an output to notify the mobile terminal 100 of the occurrence of an event. Typical events may include call reception, message reception, key signal input, touch input, and the like. In addition to audio or video output, the alarm unit 153 may provide output in different ways to notify the occurrence of an event. For example, the alarm unit 153 may provide an output in the form of vibration, and when a call, a message, or some other incoming communication (communicating communication) is received, the alarm unit 153 may provide a tactile output (i.e., vibration) to inform the user thereof. By providing such a tactile output, the user can recognize the occurrence of various events even when the user's mobile phone is in the user's pocket. The alarm unit 153 may also provide an output notifying the occurrence of an event via the display unit 151 or the audio output module 152.

The memory 160 may store software programs or the like for processing and controlling operations performed by the controller 180, or may temporarily store data (e.g., a phonebook, messages, still images, videos, etc.) that has been output or is to be output. Also, the memory 160 may store data regarding various ways of vibration and audio signals output when a touch is applied to the touch screen.

The Memory 160 may include at least one type of storage medium including a flash Memory, a hard disk, a multimedia card, a card-type Memory (e.g., SD or DX Memory, etc.), a Random Access Memory (RAM), a Static Random Access Memory (SRAM), a Read Only Memory (ROM), an Electrically Erasable Programmable Read Only Memory (EEPROM), a Programmable Read Only Memory (PROM), a magnetic Memory, a magnetic disk, an optical disk, etc. Also, the mobile terminal 100 may cooperate with a network storage device that performs a storage function of the memory 160 through a network connection.

The controller 180 generally controls the overall operation of the mobile terminal. For example, the controller 180 performs control and processing related to voice calls, data communications, video calls, and the like. In addition, the controller 180 may include a multimedia module 181 for reproducing (or playing back) multimedia data, and the multimedia module 181 may be constructed within the controller 180 or may be constructed separately from the controller 180. The controller 180 may perform a pattern recognition process to recognize a handwriting input or a picture drawing input performed on the touch screen as a character or an image.

The power supply unit 190 receives external power or internal power and provides appropriate power required to operate various elements and components under the control of the controller 180.

The various embodiments described herein may be implemented in a computer-readable medium using, for example, computer software, hardware, or any combination thereof. For a hardware implementation, the embodiments described herein may be implemented using at least one of an Application Specific Integrated Circuit (ASIC), a Digital Signal Processor (DSP), a Digital Signal Processing Device (DSPD), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), a processor, a controller, a microcontroller, a microprocessor, and an electronic unit designed to perform the functions described herein, and in some cases, such embodiments may be implemented in the controller 180. For a software implementation, the implementation such as a process or a function may be implemented with a separate software module that allows performing at least one function or operation. The software codes may be implemented by software applications (or programs) written in any suitable programming language, which may be stored in the memory 160 and executed by the controller 180.

Up to now, the mobile terminal has been described in terms of its functions. Hereinafter, a slide-type mobile terminal among various types of mobile terminals, such as a folder-type, bar-type, swing-type, slide-type mobile terminal, and the like, will be described as an example for the sake of brevity. Accordingly, the present invention can be applied to any type of mobile terminal, and is not limited to a slide type mobile terminal.

The mobile terminal 100 as shown in fig. 1 may be configured to operate with communication systems such as wired and wireless communication systems and satellite-based communication systems that transmit data via frames or packets.

A communication system in which a mobile terminal according to an embodiment of the present invention is operable will now be described with reference to fig. 2.

Such communication systems may use different air interfaces and/or physical layers. For example, the air interface used by the communication System includes, for example, Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Code Division Multiple Access (CDMA), and Universal Mobile Telecommunications System (UMTS) (in particular, Long Term Evolution (LTE)), global System for Mobile communications (GSM), and the like. By way of non-limiting example, the following description relates to a CDMA communication system, but such teachings are equally applicable to other types of systems.

Referring to fig. 2, the CDMA wireless communication system may include a plurality of Mobile terminals 100, a plurality of Base Stations (BSs) 270, a Base Station Controller (BSC) 275, and a Mobile Switching Center (MSC) 280. The MSC280 is configured to interface with a Public Switched Telephone Network (PSTN) 290. The MSC280 is also configured to interface with a BSC275, which may be coupled to the base station 270 via a backhaul. The backhaul may be constructed according to any of several known interfaces including, for example, E1/T1, ATM, IP, PPP, frame Relay, HDSL, ADSL, or xDSL. It will be understood that a system as shown in fig. 2 may include multiple BSCs 275.

Each BS270 may serve one or more sectors (or regions), each sector covered by a multi-directional antenna or an antenna pointing in a particular direction being radially distant from the BS 270. Alternatively, each partition may be covered by two or more antennas for diversity reception. Each BS270 may be configured to support multiple frequency allocations, with each frequency allocation having a particular frequency spectrum (e.g., 1.25MHz,5MHz, etc.).

The intersection of partitions with frequency allocations may be referred to as a CDMA channel. The BS270 may also be referred to as a Base Transceiver Subsystem (BTS) or other equivalent terminology. In such a case, the term "base station" may be used to generically refer to a single BSC275 and at least one BS 270. The base stations may also be referred to as "cells". Alternatively, each sector of a particular BS270 may be referred to as a plurality of cell sites.

As shown in fig. 2, a Broadcast Transmitter (BT) 295 transmits a Broadcast signal to the mobile terminal 100 operating within the system. A broadcast receiving module 111 as shown in fig. 1 is provided at the mobile terminal 100 to receive a broadcast signal transmitted by the BT 295. In fig. 2, several Global Positioning System (GPS) satellites 300 are shown. The satellite 300 assists in locating at least one of the plurality of mobile terminals 100.

In fig. 2, a plurality of satellites 300 are depicted, but it is understood that useful positioning information may be obtained with any number of satellites. The GPS module 115 as shown in fig. 1 is generally configured to cooperate with satellites 300 to obtain desired positioning information. Other techniques that can track the location of the mobile terminal may be used instead of or in addition to GPS tracking techniques. In addition, at least one GPS satellite 300 may selectively or additionally process satellite DMB transmission.

As a typical operation of the wireless communication system, the BS270 receives reverse link signals from various mobile terminals 100. The mobile terminal 100 is generally engaged in conversations, messaging, and other types of communications. Each reverse link signal received by a particular base station 270 is processed within the particular BS 270. The obtained data is forwarded to the associated BSC 275. The BSC provides call resource allocation and mobility management functions including coordination of soft handoff procedures between BSs 270. The BSCs 275 also route the received data to the MSC280, which provides additional routing services for interfacing with the PSTN 290. Similarly, the PSTN290 interfaces with the MSC280, the MSC interfaces with the BSCs 275, and the BSCs 275 accordingly control the BS270 to transmit forward link signals to the mobile terminal 100.

Based on the mobile terminal hardware structure and the communication system, in order to better serve users and enable the users to shoot photos with good effect by using the front-facing camera in the environment with dark light, the invention provides various embodiments of the method.

Example one

Fig. 3 is a first schematic flow chart illustrating an implementation of the photographing control method according to an embodiment of the present invention, where the photographing control method in this example is applied to a mobile terminal, and as shown in fig. 3, the photographing control method mainly includes the following steps:

step 301: when detecting that the front camera and the rear camera are simultaneously opened, acquiring first photometric data of the rear camera.

Here, the first photometric data includes: ambient light intensity, EV value, etc.

Wherein the EV value is generally determined by a shutter index and an aperture index; the ambient light intensity is the light intensity of the shooting environment at which the rear camera is pointed.

Here, the first photometric data may be obtained by detecting the light intensity of the shooting environment by the rear camera or a photometric system connected to the rear camera.

In an optional embodiment, after detecting that the front camera and the rear camera are turned on simultaneously, the method further includes:

That is, only when the brightness of the environment pointed by the front camera is lower than a certain value, the rear camera is informed to measure the first photometric data.

When the brightness of the environment pointed by the front camera is higher than a certain threshold and smaller than a second preset brightness threshold, directly photographing the picture collected by the front camera according to photometric data measured by the front camera; therefore, the shot picture is more real, and the environmental scene of the side, to which the front camera points at the time of shooting, can be restored.

That is to say, when the brightness of the environment pointed by the front camera is higher than the second preset brightness threshold, the rear camera is also informed to measure the first photometric data.

In an optional embodiment, when it is detected that the front camera and the rear camera are simultaneously turned on, acquiring first photometric data of the rear camera includes:

directly closing the light metering function of the front camera;

and informing the rear camera to measure first photometric data.

That is to say, when detecting that the front camera is opened, directly notifying the rear camera to measure the first photometric data. Thus, pictures collected by the front camera are photographed directly according to the first photometric data measured by the rear camera; when the front camera is used for photographing in a dark environment, the photographing effect of the front camera cannot be influenced due to the fact that the environment pointed by the front camera is dark.

In practical application, when the mobile terminal receives a photographing instruction sent by a user through a first key, the mobile terminal is controlled to start the front camera, and a framing picture acquired through the front camera is displayed on a display screen.

Step 302: and adjusting the photometric value of a framing picture of the front camera based on the first photometric data.

Generally, in order to better ensure the photographing effect of photographing with the front camera in a dark environment, the framing and photometric data of the front camera adaptively changes along with the change of the light intensity of the environment pointed by the rear camera.

In an optional embodiment, the adjusting the photometric value of the viewfinder frame of the front camera includes:

In a specific embodiment, the rear camera acquires a viewfinder picture with better quality, measures light data of each area or each point in the viewfinder picture, and generates first photometric data based on the light data of each area or each point; then the mobile terminal feeds back the first photometric data area to the framing picture of the front camera in a region-to-region or point-to-point mode, wherein the size of the framing picture of the rear camera is generally equal to that of the framing picture of the front camera; so, leading camera utilizes first photometry data is right the frame of finding a view of leading camera carries out the photometry location, makes the data is measured in the view of leading camera and the whole photometry data that rear camera surveyed are unanimous.

For example, the rear camera obtains an image with a size of 100 × 100; dividing the image into 5 regions, a middle region, and an upper left corner region, a lower left corner region, an upper right corner region and a lower right corner region which surround the middle region; the photometric data corresponding to each area is different; the method comprises the steps that a viewfinder picture is obtained through a front camera, the size of the viewfinder picture is also 100 x 100, the viewfinder picture is also divided into 5 areas with equal size and shape corresponding to an image obtained by a rear camera, and photometric data of each area respectively corresponds to photometric data in the image obtained by the corresponding rear camera. Therefore, the framing and photometric data of the front camera is consistent with the overall photometric data measured by the rear camera.

For another example, the rear camera obtains an image with a size of 100 × 100; dividing the image into a plurality of pixel points; photometric data corresponding to each pixel point may be different; the method comprises the steps that a framing picture is obtained through a front camera, the size of the framing picture is also 100 x 100, the framing picture is also divided into a plurality of pixel points corresponding to an image obtained by a rear camera, and photometric data of each pixel point respectively correspond to photometric data in the image obtained by the corresponding rear camera. Therefore, the framing and photometric data of the front camera is consistent with the overall photometric data measured by the rear camera.

In an optional embodiment, the adjusting the photometric value of the viewfinder frame of the front camera based on the first photometric data includes:

and performing photometric positioning on a framing picture of the front camera by using the second photometric data, so that the photometric data according to the image shot by the front camera is consistent with the second photometric data measured by the rear camera.

Here, the first region is a partial region of the entire finder screen.

In a specific embodiment, when the user does not satisfy the adjustment of front photometry by using the overall photometry of the rear camera, the photometry frame of the front camera can be moved, a first area in the framing picture of the rear camera is determined through the photometry frame, second photometry data corresponding to the first area is acquired from the first photometry data, and the framing picture of the front camera is supplemented with light based on the second photometry data.

For example, the rear camera obtains an image with a size of 100 × 100; dividing the image into 5 regions, a middle region, and an upper left corner region, a lower left corner region, an upper right corner region and a lower right corner region which surround the middle region; the corresponding photometric data of each area are different, and the brightness of the middle area is obviously higher than that of the other areas; acquiring a view frame through a front camera, wherein the size of the view frame is also 100 multiplied by 100, the view frame is also divided into 5 areas with equal size and shape corresponding to an image acquired by a rear camera, and photometric data of each area respectively corresponds to photometric data in the image acquired by the corresponding rear camera; if the user considers that other areas are dark, the light measurement frame of the front camera can be moved, the middle area in the framing picture of the rear camera is determined through the light measurement frame, second light measurement data corresponding to the middle area are obtained from the first light measurement data, and the whole framing picture of the front camera is supplemented with light based on the second light measurement data; therefore, the framing and photometric data of the front camera is consistent with the photometric data of the middle area measured by the rear camera, and the front camera is further helpful to obtain an image with the brightness meeting the requirements of a user.

In a specific embodiment, the method further comprises:

Therefore, the framing picture of the rear camera is displayed in the light measuring frame corresponding to the front camera, a user can conveniently select the first area pre-selected by the user, and the selection process is simpler and clearer. Therefore, the framing and metering of the front camera are changed according to the metering area of the rear camera corresponding to the metering frame, and the purpose of changing the metering data of the front camera by using the metering area of the rear camera is achieved.

Step 303: and controlling the front camera to photograph the framing picture based on the adjusted photometric value.

Optionally, the controlling the front camera to photograph the framing picture based on the adjusted photometric value may include:

and controlling the front camera to photograph a part of the framing picture based on the adjusted photometric value.

and controlling the front camera to photograph the whole framing picture based on the adjusted photometric value.

Therefore, the photographing effect of the front camera can be improved.

In the embodiment of the invention, when the front camera is detected to be opened, first photometric data of the rear camera is acquired; supplementing light to a framing picture of the front camera based on the first photometric data; controlling the front camera to photograph the framing picture based on the photometric data after light supplement; so, based on first photometry data is shooed in to leading camera's the frame of finding a view picture, has solved at least and has used leading camera to shoot the poor problem of photographic effect when environment that light is darker or light is too strong under using, has improved the photographic effect of leading camera, has promoted user's use and has experienced.

Example two

Fig. 4 is a schematic diagram of an implementation flow of a photographing control method according to an embodiment of the present invention, where the photographing control method in this example is applied to a mobile terminal, and as shown in fig. 4, the photographing control method mainly includes the following steps:

step 401: and starting the preset application according to the selection operation of the user.

Here, the preset application may be understood as an application having a positive and negative photometry function.

The front and back light metering function is capable of supplementing light to a view-finding picture of the front camera according to light metering data of the rear camera.

That is, the preset application is started only when a selection operation by the user is received.

Of course, in another optional embodiment, when the mobile terminal detects that the front camera is turned on, the preset application is automatically started.

Fig. 5 is a schematic diagram illustrating a preset application starting process, and as shown in fig. 5, when the mobile terminal receives an operation of clicking the preset application icon by a user, the preset application is started.

Step 402: and measuring first photometric data by using the rear camera.

Specifically, the rear camera performs photometry on an environment pointed by the rear camera, and first photometry data is generated. The first photometric data includes an ambient light intensity, an EV value, and the like.

Step 403: and supplementing light for the framing picture of the front camera based on the first photometric data.

Fig. 6 shows a schematic diagram of a rear camera performing light supplement on a framing picture of a front camera based on overall photometric data, where as shown in fig. 6, the rear camera acquires a framing picture with better quality within a preset range, measures overall photometric data in the framing picture, and then the mobile terminal feeds the overall photometric data as first photometric data back to the framing picture of the front camera in a region-to-region or point-to-point manner.

In this way, the framing and metering of the front camera is determined by metering data measured by the rear camera.

Step 404: judging whether a first operation is detected within a preset time, and if the first operation is detected, executing a step 405; if the first operation is not detected, go to step 407.

Wherein the first operation is to instruct determination of the second photometric data according to an input operation.

Step 405: and acquiring a first area in the framing picture of the rear camera determined according to the first operation, and then executing step 406.

Step 406: acquiring second photometric data corresponding to the first area from the first photometric data; and supplementing light to the framing picture of the front camera based on the second photometric data.

Fig. 7 is a schematic diagram illustrating that a rear camera performs light supplement on a framing picture of a front camera based on photometric data of a local area, and as shown in fig. 7, the rear camera acquires a framing picture with better quality within a preset range, and then acquires second photometric data corresponding to a first area in the framing picture of the rear camera determined by the first operation according to the first area; and supplementing light to the framing picture of the front camera based on the second photometric data. As shown in fig. 7, the light measurement frame may move, and a view frame acquired by a rear camera is displayed on a display screen of the mobile terminal, for example, a user may move the light measurement frame to a part of an area in the view frame according to a requirement, and the light measurement frame may be enlarged or reduced, so that a first area selected by the user can be defined more accurately.

In this way, the framing and metering of the front camera is determined by metering data of the partial area in the framing picture measured by the rear camera.

Step 407: and controlling the front camera to photograph at least one part of the framing picture based on the photometric data after light supplement.

For example, when the user selects a predetermined application, the following operations may be performed:

the first step is as follows: a user clicks a 'preset application' button on a terminal desktop to select to start the positive and negative photometric function.

Specifically, after the click operation is received, the positive and negative photometric function of the system is turned on, and whether the user is using the front camera to take a picture is detected in real time.

Of course, the shortcut key of the 'preset application' button can be placed on the main interface of the camera application, so that the function of forward and backward photometry can be started more conveniently and quickly after the camera application is started.

The second step is that: after the positive and negative photometry function is started, when the user is detected to shoot by using the front camera, the mobile terminal automatically calls the positive and negative photometry function, photometry is performed by using the rear camera, and the measured first photometry data is stored.

The third step: after the mobile terminal obtains first photometric data of a rear camera, framing and photometry of a front camera are adjusted according to the first photometric data.

The fourth step: when the user does not meet the requirement of adjusting the front metering by using the rear integral metering, the metering frame of the front camera can be moved, and when the metering frame is moved, a drawing function is called to temporarily display the rear metering area corresponding to the metering frame in the front view in a ghost situation, namely, a view picture acquired by the rear camera is temporarily displayed, as shown in fig. 7, the user can select a certain area in the metering area of the rear camera by moving the metering frame to obtain metering data of the certain area, and simultaneously transmit the metering data to the front view for drawing, so that the front view metering changes according to the change of the rear metering area corresponding to the metering frame, and the purpose of changing the front metering by using the rear metering area is achieved.

In the embodiment of the invention, the preset application can be started according to the selection operation of the user, the front camera with weak light metering capability originally uses the light metering data of the rear camera to perform light supplementing, so that the brightness of the photos shot by the front camera can reach an overall balanced state, and the light metering can also be performed according to the personal preference of the user, so that the user has better user experience, and the playability and the interestingness of the user are also improved.

EXAMPLE III

Fig. 8 is a schematic view of a first composition structure of a mobile terminal according to an embodiment of the present invention, as shown in fig. 8, the mobile terminal includes a detection unit 81, an acquisition unit 82, a light supplement unit 83, and a control unit 84; wherein,

the detection unit 81 is used for detecting whether the front camera and the rear camera are simultaneously started;

the acquiring unit 82 is configured to acquire first photometric data of a rear camera;

the light supplement unit 83 is configured to adjust a photometric value of a framing picture of the front camera based on the first photometric data;

the control unit 84 is configured to control the front-facing camera to photograph the framing picture based on the adjusted photometric value.

In one embodiment, the mobile terminal further includes:

the judging unit 85 is configured to judge whether the current ambient light brightness, measured by the front camera, of the display screen of the mobile terminal in the direction facing the direction is lower than a first preset brightness threshold value after the detecting unit 81 detects that the front camera and the rear camera are simultaneously turned on; if the brightness is lower than the first preset brightness threshold value, the rear camera is informed to measure first photometric data; and/or judging whether the current ambient light brightness of the display screen of the mobile terminal in the direction of the display screen, which is measured by the front camera, is higher than a second preset brightness threshold value; and if the brightness is higher than the second preset brightness threshold value, the rear camera is informed to measure first photometric data.

In an optional embodiment, the light supplement unit 83 is further configured to:

In an embodiment, the mobile terminal further includes:

a display unit 86 configured to simultaneously display a viewfinder image of the front camera and a viewfinder image of the rear camera on a display screen; and displaying a framing picture of the rear camera in the light measuring frame corresponding to the front camera, and selecting a first area of the framing picture of the rear camera by moving the light measuring frame.

Those skilled in the art will understand that the implementation functions of each processing unit in the mobile terminal shown in fig. 8 can be understood by referring to the related description of the photographing control method. Those skilled in the art will appreciate that each processing unit in the mobile terminal shown in fig. 8 may be implemented by a program running on a processor, and may also be implemented by specific logic circuits.

The specific structures of the detecting unit 81, the obtaining unit 82, the light supplementing unit 83, and the control unit 84 in the mobile terminal described in the above embodiments may all correspond to a processor in practical applications. The specific structure of the processor may be a Central Processing Unit (CPU), a Micro Controller Unit (MCU), a Digital Signal Processor (DSP), a Programmable Logic Controller (PLC), or other electronic components or a collection of electronic components having a Processing function. The processor includes executable codes, the executable codes are stored in a storage medium, the processor can be connected with the storage medium through a communication interface such as a bus, and when the corresponding functions of specific units are executed, the executable codes are read from the storage medium and executed. The portion of the storage medium used to store the executable code is preferably a non-transitory storage medium.

This embodiment mobile terminal has solved at least and has used leading camera to shoot the poor problem of effect when using under the environment that light is darker or light is too strong, improves leading camera's the effect of shooing, promotes user's use and experiences.

Example four

Fig. 9 is a schematic diagram of a second composition structure of the mobile terminal according to the embodiment of the present invention, as shown in fig. 9, the mobile terminal includes a sensor 91 and a processor 92; wherein,

a sensor 91 for detecting whether the front camera and the rear camera are simultaneously turned on;

a processor 92, configured to obtain first photometric data of the rear camera; adjusting a photometric value of a framing picture of the front camera based on the first photometric data; and controlling the front camera to photograph the framing picture based on the adjusted photometric data.

In one embodiment, the processor 92 is further configured to:

after detecting that a front camera and a rear camera are simultaneously started, judging whether the current ambient light brightness of a display screen of the mobile terminal in the direction of the display screen, which is measured by the front camera, is lower than a first preset brightness threshold value or not; if the brightness is lower than the first preset brightness threshold value, the rear camera is informed to measure first photometric data; and/or judging whether the current environment light brightness of the display screen of the mobile terminal in the direction is higher than a second preset brightness threshold value or not, wherein the current environment light brightness is measured by the front camera; and if the brightness is higher than the second preset brightness threshold value, the rear camera is informed to measure first photometric data.

As an optional implementation, the processor 92 is further configured to:

simultaneously displaying a framing picture of the front camera and a framing picture of the rear camera on a display screen; and displaying a framing picture of the rear camera in the light measuring frame corresponding to the front camera, and selecting a first area of the framing picture of the rear camera by moving the light measuring frame.

Those skilled in the art will understand that the implementation functions of each processing unit in the mobile terminal shown in fig. 9 can be understood by referring to the related description of the photographing control method.

In practical applications, the processor 92 may be implemented by a CPU, a DSP, an FPGA, or the like in the mobile terminal.

The technical schemes described in the embodiments of the present invention can be combined arbitrarily without conflict.

In the embodiments provided in the present invention, it should be understood that the disclosed method and intelligent device may be implemented in other ways. The above-described device embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or other forms.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, all the functional units in the embodiments of the present invention may be integrated into one second processing unit, or each unit may be separately regarded as one unit, or two or more units may be integrated into one unit; the integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention.

Claims

1. A mobile terminal, characterized in that the mobile terminal comprises:

and the control unit is used for controlling the front camera to photograph the framing picture based on the adjusted photometric value.

2. The mobile terminal of claim 1, wherein the mobile terminal further comprises:

3. The mobile terminal of claim 1, wherein the light supplement unit is further configured to:

4. The mobile terminal of claim 1, wherein the light supplement unit is further configured to:

5. The mobile terminal of claim 4, wherein the mobile terminal further comprises:

6. A photographing control method is applied to a mobile terminal, and is characterized by comprising the following steps:

acquiring first photometric data of a rear camera;

and adjusting the photometric value of a framing picture acquired by the front camera based on the first photometric data, and taking pictures of the framing picture.

7. The method of claim 6, wherein after detecting that the front camera and the rear camera are simultaneously on, the method further comprises:

if the brightness is lower than the preset brightness threshold value, the rear camera is informed to measure first photometric data; and/or

8. The method of claim 6, wherein the adjusting the photometric value of the viewfinder frame acquired by the front camera based on the first photometric data comprises:

9. The method of claim 6, wherein the adjusting the photometric value of the viewfinder frame acquired by the front camera based on the first photometric data comprises:

10. The method of claim 9, further comprising: