CN106101569A - A kind of method of light filling of taking pictures and mobile terminal - Google Patents

Abstract

The present invention provides a method for supplementing light when photographing and a mobile terminal, wherein the method is applied to the mobile terminal, including: acquiring a frame of preview image collected by the camera of the mobile terminal; based on the preview image, calculating the environment where the mobile terminal is located Color temperature value; based on the ambient color temperature value, determine the target fill light to be activated among the at least two fill lights of the mobile terminal; control the target fill light to perform fill light; wherein, the color temperature values of at least two fill lights are different. The embodiment of the present invention solves the problem that the brightness and color temperature of the supplementary light of the mobile terminal in the prior art are fixed values. The supplementary light effect of the supplementary light will change with the environment where the mobile terminal is located, and the supplementary light color of the supplementary light The problem of incompatibility with the environment enables the mobile terminal to take pictures with better effects and improves user experience.

Description

Method and mobile terminal for supplementing light when taking photos

technical field

The present invention relates to the field of communication technology, in particular to a method for supplementing light when taking pictures and a mobile terminal.

Background technique

With the continuous development of mobile terminals, photographing and video recording have become standard functions of mobile terminals, and people's requirements for photographing and video recording effects are also getting higher and higher. However, due to the influence of the ambient brightness, the pictures taken by the mobile terminal in a dark environment are poor in effect, for example, the pictures have poor definition, severe noise, and low brightness. At this time, in order to solve the problem of poor shooting effect in a dark environment, more and more mobile terminals have begun to install supplementary lights.

At present, most of the supplementary light on the mobile terminal is an external light source, which will be automatically turned on in a dark environment, thereby increasing the ambient brightness of the environment. However, the brightness and color temperature of the light source are fixed, that is, no matter what environment the mobile terminal is in, the brightness and color temperature of the light source are all certain values. The light effect will change with the environment where the mobile terminal is located, and it is also easy to cause the problem that the fill light color of the fill light does not match the environment.

Contents of the invention

The present invention provides a method and a mobile terminal for supplementary light for photographing, so as to solve the problem that in the prior art, when the mobile terminal is in different environments, the supplementary light effect of the supplementary light will change with the environment where the mobile terminal is located, and the color of the supplementary light is easy to be different from that of the mobile terminal. The environment does not match the problem.

In a first aspect, the present invention provides a method for supplementing light when taking pictures, which is applied to a mobile terminal, and the method includes:

Obtain a frame of preview image collected by the camera of the mobile terminal;

Based on the preview image, calculate the ambient color temperature value of the environment where the mobile terminal is located;

Based on the ambient color temperature value, determine a target fill light to be activated among at least two fill lights of the mobile terminal;

controlling the target fill light to perform fill light;

Wherein, the color temperature values of the at least two fill lights are different.

In the second aspect, the present invention also provides a mobile terminal, the mobile terminal includes a camera and at least two supplementary lights, and further includes:

An acquisition module, configured to acquire a frame of preview image collected by the camera of the mobile terminal;

A first calculation module, configured to calculate an ambient color temperature value of the environment where the mobile terminal is located based on the preview image acquired by the acquisition module;

A first determination module, configured to determine a target supplementary light to be activated among at least two supplementary lights of the mobile terminal based on the ambient color temperature value calculated by the first calculation module;

The control module is configured to control the target fill light determined by the first determination module to perform fill light; wherein, the color temperature values of the at least two fill lights are different.

In this way, in the embodiment of the present invention, by first acquiring a preview image captured by the camera of the mobile terminal, and then determining at least two color temperature values of the mobile terminal based on the ambient color temperature value of the environment where the mobile terminal is located through the calculation of the preview image Among the fill lights with different values, the target fill light to be started is finally controlled to perform fill light, so that the mobile terminal can control the target that can emit the color temperature closest to the ambient color temperature of the environment where the mobile terminal is located. The supplementary light performs supplementary light, so that the mobile terminal can take advantage of the supplementary light effect of the target supplementary light to take better images, and solves the problem of the supplementary light effect of the supplementary light in the prior art when the mobile terminal is in different environments. The environment of the mobile terminal changes, and the color of the supplementary light does not easily match the environment.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments of the present invention. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention , for those skilled in the art, other drawings can also be obtained according to these drawings without paying creative labor.

Fig. 1 represents the flow chart of the method for photographing supplementary light in the first embodiment of the present invention;

Fig. 2 shows the flowchart of the method for taking pictures and supplementing light in the second embodiment of the present invention;

Fig. 3 represents one of the structural block diagrams of the mobile terminal in the third embodiment of the present invention;

Fig. 4 shows the second structural block diagram of the mobile terminal in the third embodiment of the present invention;

Fig. 5 shows the structural block diagram of mobile terminal in the 4th embodiment of the present invention;

Fig. 6 shows a block diagram of a mobile terminal in a fifth embodiment of the present invention.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

First embodiment:

As shown in Figure 1, it is a flow chart of the method for taking pictures and supplementing light in the first embodiment of the present invention, including:

Step 101, acquire a frame of preview image captured by a camera of a mobile terminal.

In this step, specifically, the mobile terminal is provided with a camera, and the mobile terminal can obtain a frame of preview image collected by the camera of the mobile terminal.

Step 102, based on the preview image, calculate the ambient color temperature value of the environment where the mobile terminal is located.

In this step, specifically, when calculating the ambient color temperature value of the environment where the mobile terminal is located based on the preview image, the RGB information of the preview image can be obtained first, and then the mobile terminal can be calculated based on the obtained RGB information and the automatic white balance algorithm. The ambient color temperature value of the environment where the terminal is located.

Step 103, based on the ambient color temperature value, determine a target supplementary light to be activated among at least two supplementary lights of the mobile terminal.

Specifically, the mobile terminal is provided with at least two supplementary lights, and the color temperature values of the at least two supplementary lights are different. In this step, the mobile terminal may determine a target supplementary light to be activated among at least two supplementary lights of the mobile terminal based on the ambient color temperature value.

Specifically, since the color temperature values of at least two supplementary lights are different, when determining the target supplementary light to be activated of the mobile terminal based on the ambient color temperature value, it can be determined that the at least two supplementary lights of the mobile terminal can emit The fill light with a color temperature matching the ambient color temperature value is the target fill light.

Step 104, controlling the target fill light to perform fill light.

In this step, specifically, after the target fill light to be activated is determined, the target fill light may be controlled to be activated, that is, the target fill light may be controlled to perform fill light.

In this way, in this embodiment, by acquiring a frame of preview image collected by the camera of the mobile terminal, and based on the ambient color temperature value of the environment where the mobile terminal is located calculated through the preview image, it is determined that at least two color temperature values of the mobile terminal are different. The target fill light to be started in the fill light, and finally control the target fill light to fill in light, so that the mobile terminal can control the target fill light that can emit the color temperature closest to the ambient color temperature of the environment where the mobile terminal is located. , so that the mobile terminal can use the fill light effect of the target fill light to take better images, and solve the problem that in the prior art, when the mobile terminal is in different environments, the fill light effect of the fill light will vary with the environment where the mobile terminal is located. Changes, and the problem that the color of the fill light is easy to not match the environment.

Second embodiment:

As shown in Figure 2, it is a flow chart of the method for taking pictures and supplementing light in the second embodiment of the present invention, including:

Step 201, acquire a frame of preview image captured by a camera of a mobile terminal.

In this step, specifically, the mobile terminal is provided with a camera, and the mobile terminal can obtain a frame of preview image collected by the camera of the mobile terminal.

Step 202, based on the preview image, calculate the ambient color temperature value of the environment where the mobile terminal is located.

In this step, specifically, when calculating the ambient color temperature value of the environment where the mobile terminal is located based on the preview image, the RGB information of the preview image can be obtained first, and then the mobile terminal can be calculated based on the obtained RGB information and the automatic white balance algorithm. The ambient color temperature value of the environment where the terminal is located.

Step 203, based on the ambient color temperature value, determine a target supplementary light to be activated among at least two supplementary lights of the mobile terminal.

Specifically, the mobile terminal includes a first supplementary light with a first color temperature value, a second supplementary light with a second color temperature value, and a third supplementary light with a third color temperature value, wherein the first color temperature value is smaller than the first color temperature value Two color temperature values, the second color temperature value is smaller than the third color temperature value. In this way, when determining the target fill light to be activated among the at least two fill lights of the mobile terminal based on the acquired ambient color temperature value, if the ambient color temperature value of the environment where the mobile terminal is located is greater than the preset first color temperature threshold, Then it can be determined that the target fill light to be activated is the third fill light; if the ambient color temperature value is greater than the preset second color temperature threshold and less than the first color temperature threshold, then it is determined that the target fill light to be activated is the second fill light light and the third fill light; if the ambient color temperature value is greater than the preset third color temperature threshold and less than the second color temperature threshold, then determine that the target fill light to be activated is the first fill light and the second fill light; if If the ambient color temperature value is less than the third color temperature threshold, it is determined that the target supplementary light to be activated is the first supplementary light.

In this way, when the ambient color temperature value is greater than the highest first color temperature threshold, it can be determined that the target supplementary light to be started is the supplementary light that can emit the highest color temperature among all supplementary lights of the mobile terminal; When there are three color temperature thresholds, it can be determined that the target supplementary light to be started is the supplementary light with the lowest color temperature among all the supplementary lights of the mobile terminal; when the ambient color temperature value is less than the highest first color temperature threshold, and greater than the next When the first color temperature threshold is the second color temperature threshold, it can be determined that the target supplementary light to be started is the supplementary light that can emit the highest color temperature and the supplementary light that can emit the highest color temperature among all the supplementary lights of the mobile terminal; When the ambient color temperature value is less than the second color temperature threshold next to the highest first color temperature threshold, and greater than the third lowest color temperature threshold, it can be determined that the target supplementary light to be activated is one of all supplementary lights of the mobile terminal that can emit only The fill light with the highest color temperature and the fill light with the lowest color temperature. In this way, the target fill light to be activated can be made to emit a color temperature closest to that of the environment where the mobile terminal is located, so that the mobile terminal can capture images with better effects according to the fill light effect of the target fill light.

Step 204, based on the preview image, calculate the ambient brightness value of the environment where the mobile terminal is located.

In this step, specifically, after determining the target supplementary light to be activated among the at least two supplementary lights of the mobile terminal based on the acquired ambient color temperature value, the mobile terminal can also be calculated based on the acquired preview image. The ambient brightness value of the environment. Specifically, when calculating the ambient brightness value of the environment where the mobile terminal is located based on the obtained preview image, the exposure time value, exposure gain value, and image brightness value of the preview image can be obtained first, and then based on the exposure time value and exposure gain value , calculate the exposure index, and finally calculate the ambient brightness value of the environment where the mobile terminal is located based on the exposure index and the image brightness value.

Step 205: Determine the fill light current of the target fill light according to the ambient brightness value and the preset relationship between the ambient brightness value and the fill light current.

In this step, specifically, the mobile terminal may determine the supplementary light current of the target supplementary light according to the acquired ambient brightness value and the preset relationship between the ambient brightness value and the supplementary light current. Specifically, there is an inverse correlation between the ambient brightness value and the fill light current, that is, the larger the ambient brightness value, the smaller the fill light current, and the smaller the ambient brightness value, the greater the fill light current.

In this way, the smaller the acquired ambient brightness value, the greater the current of the fill light of the target fill light, that is, the greater the brightness of the target fill light, so that the brightness emitted by the target fill light of the mobile terminal can be compared with that of the mobile terminal. The ambient brightness of the surrounding environment is matched, so that the target supplementary light of the mobile terminal can take pictures with better effects according to the brightness of the supplementary light corresponding to the current of the supplementary light. Of course, when the acquired ambient brightness value is larger, the current of the target supplementary light is smaller, that is, the brightness of the target supplementary light is smaller, so that the brightness of the target supplementary light meets the shooting requirements of the mobile terminal. , saving power for the mobile terminal.

Step 206, controlling the target fill light to perform fill light according to the current of the fill light.

In this step, specifically, after the fill light current of the target fill light is determined, the target fill light may be controlled to perform fill light according to the fill light current. In addition, optionally, in order to narrow the difference between the ambient color temperature of the environment where the mobile terminal is located and the color temperature emitted by the target fill light, the current of the fill light can be fine-tuned, so that the color temperature emitted by the target fill light is consistent with the mobile The ambient color temperature of the environment where the terminal is located is closer, so that the mobile terminal can take pictures with better effects according to the fill light effect of the target fill light.

This is illustrated here with an example.

Assume that the target fill light to be activated is the first fill light corresponding to the first color temperature value and the second fill light corresponding to the second color temperature value, although the first fill light corresponding to the first color temperature value and the second color temperature value The color temperature comprehensively emitted by the corresponding second supplementary light is closest to the ambient color temperature of the environment where the mobile terminal is located, but the comprehensive emission of the first supplementary light corresponding to the first color temperature value and the second supplementary light corresponding to the second color temperature value is There is still a certain gap between the color temperature and the ambient color temperature of the environment where the mobile terminal is located. At this time, the currents of the first supplementary light and the second supplementary light can be fine-tuned respectively, so that the adjusted color temperature of the first supplementary light and the second supplementary light is closer to the ambient color temperature. Further improved the matching between the ambient color temperature and the color temperature emitted by the target fill light.

In this way, in this embodiment, the target supplementary light to be activated among the at least two supplementary lights of the mobile terminal is determined through the ambient color temperature value of the environment where the mobile terminal is located, and then the target supplementary light to be activated is determined according to the ambient brightness value of the environment where the mobile terminal is located. Determine the fill light current of the target fill light, and finally control the target fill light to perform fill light according to the fill light current. In this way, in this embodiment, when the mobile terminal is taking pictures, the target supplementary light can emit the color temperature closest to the ambient color temperature of the environment where the mobile terminal is located, and emit the brightness closest to the ambient brightness, which solves the problem of mobile terminals in the prior art. The brightness and color temperature of the fill light are fixed values. The fill light effect of the fill light will change with the environment where the mobile terminal is located, and the fill light color of the fill light does not match the environment. The terminal can take pictures with better effects according to the fill light effect of the target fill light, which improves the user experience.

Third embodiment:

As shown in Figure 3, it is one of the structural block diagrams of the mobile terminal in the third embodiment of the present invention, the mobile terminal includes a camera and at least two supplementary lights, and also includes:

An acquisition module 301, configured to acquire a frame of preview image collected by the camera of the mobile terminal;

The first calculation module 302 is used to calculate the environmental color temperature value of the environment where the mobile terminal is located based on the preview image acquired by the acquisition module 301;

The first determination module 303 is configured to determine the target supplementary light to be activated among the at least two supplementary lights of the mobile terminal based on the ambient color temperature value calculated by the first calculation module 302;

The control module 304 is configured to control the target fill light determined by the first determination module 303 to perform fill light; where at least two fill light have different color temperature values.

In this way, a frame of preview image collected by the camera of the mobile terminal is obtained by the acquisition module, and then the ambient color temperature value of the environment where the mobile terminal is located is calculated based on the preview image by the first calculation module, and then determined by the first determination module. The target fill light to be started among the at least two fill lights with different color temperature values of the terminal is finally controlled by the control module to perform fill light, so that the mobile terminal can control the light that can be emitted and the environment where the mobile terminal is located. The target fill light with the color temperature closest to the ambient color temperature is used to fill in the light, so that the mobile terminal can use the fill light effect of the target fill light to shoot better images, which solves the problem of mobile terminals in different environments in the prior art. , the supplementary light effect of the supplementary light will change with the environment where the mobile terminal is located, and the problem that the supplementary light color is likely not to match the environment.

As shown in FIG. 4 , it is the second structural block diagram of the mobile terminal in the third embodiment of the present invention.

Optionally, the first calculation module 302 includes: a first acquisition unit 3021, configured to acquire the RGB information of the preview image; a first calculation unit 3022, configured to calculate based on the RGB information acquired by the first acquisition unit and the automatic white balance algorithm The ambient color temperature value of the environment where the mobile terminal is located is obtained.

Optionally, the mobile terminal includes a first supplementary light with a first color temperature value, a second supplementary light with a second color temperature value, and a third supplementary light with a third color temperature value, wherein the first color temperature value is less than The second color temperature value, the second color temperature value is smaller than the third color temperature value.

Optionally, the first determination module 303 is configured to determine that the target supplementary light to be activated is the third supplementary light if the ambient color temperature value is greater than the preset first color temperature threshold.

Optionally, the first determining module 303 is configured to determine that the target supplementary light to be activated is the second supplementary light and the third supplementary light if the ambient color temperature value is greater than the preset second color temperature threshold and less than the first color temperature threshold. lights.

Optionally, the first determining module 303 is configured to determine that the target supplementary light to be activated is the first supplementary light and the second supplementary light if the ambient color temperature value is greater than the preset third color temperature threshold and less than the second color temperature threshold. lights.

Optionally, the first determination module 303 is configured to determine that the target supplementary light to be activated is the first supplementary light if the ambient color temperature value is less than the third color temperature threshold.

Optionally, the mobile terminal further includes: a second calculation module 305, configured to calculate the ambient brightness value of the environment where the mobile terminal is located based on the preview image acquired by the acquisition module 301; 305 Determine the supplementary light current of the target supplementary light based on the calculated ambient brightness value and the preset relationship between the ambient brightness value and the current of the supplementary light; wherein, the ambient brightness value is inversely correlated with the current of the supplementary light.

Optionally, the second computing module 305 includes: a second obtaining unit 3051, configured to obtain the exposure time value, exposure gain value, and image brightness value of the preview image; a second computing unit 3052, configured to value to calculate the exposure index; the third calculation unit 3053 is configured to calculate the ambient brightness value of the environment where the mobile terminal is located based on the exposure index and the image brightness value.

Optionally, the control module 304 is configured to control the target fill light to perform fill light according to the current of the fill light determined by the second determination module.

In this way, in this embodiment, the target supplementary light to be activated among the at least two supplementary lights of the mobile terminal is determined through the ambient color temperature value of the environment where the mobile terminal is located, and then the target supplementary light to be activated is determined according to the ambient brightness value of the environment where the mobile terminal is located. Determine the fill light current of the target fill light, and finally control the target fill light to perform fill light according to the fill light current. In this way, in this embodiment, when the mobile terminal is taking pictures, the target supplementary light can emit the color temperature closest to the ambient color temperature of the environment where the mobile terminal is located, and emit the brightness closest to the ambient brightness, which solves the problem of mobile terminals in the prior art. The brightness and color temperature of the fill light are fixed values. The fill light effect of the fill light will change with the environment where the mobile terminal is located, and the fill light color of the fill light does not match the environment. The terminal can take pictures with better effects according to the fill light effect of the target fill light, which improves the user experience.

Fourth embodiment:

As shown in FIG. 5 , it is a structural block diagram of the mobile terminal in the fourth embodiment of the present invention. The mobile terminal 500 shown in FIG. 5 includes: at least one processor 501 , a memory 502 , at least one network interface 504 , and a user interface 503 . Various components in the mobile terminal 500 are coupled together through the bus system 505 . It can be understood that the bus system 505 is used to realize connection and communication between these components. In addition to the data bus, the bus system 505 also includes a power bus, a control bus and a status signal bus. However, for clarity of illustration, the various buses are labeled as bus system 505 in FIG. 5 . In addition, the mobile terminal 500 also includes a camera 506 and at least two supplementary lights 507 .

Wherein, the user interface 503 may include a display, a keyboard, or a pointing device (for example, a mouse, a trackball (trackball), a touch panel, or a touch screen, and the like.

It can be understood that the memory 502 in the embodiment of the present invention may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories. Wherein, the non-volatile memory may be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electronically programmable Erase Programmable Read-Only Memory (Electrically EPROM, EEPROM) or Flash. The volatile memory can be Random Access Memory (RAM), which acts as an external cache. By way of illustration and not limitation, many forms of RAM are available such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data RateSDRAM, DDRSDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (Synchlink DRAM, SLDRAM) and Direct memory bus random access memory (DirectRambus RAM, DRRAM). The memory 502 of the systems and methods described in embodiments of the present invention is intended to include, but is not limited to, these and any other suitable types of memory.

In some implementations, the memory 502 stores the following elements, executable modules or data structures, or their subsets, or their extended sets: an operating system 5021 and an application program 5022 . Specifically, setting modules and configuration files are stored in the memory 502 .

Among them, the operating system 5021 includes various system programs, such as framework layer, core library layer, driver layer, etc., for realizing various basic services and processing tasks based on hardware. The application program 5022 includes various application programs, such as a media player (Media Player), a browser (Browser), etc., and is used to implement various application services. The program for realizing the method of the embodiment of the present invention may be included in the application program 5022 .

In the embodiment of the present invention, the program or instruction stored in the memory 502 is called, specifically, the program or instruction stored in the application program 5022 may be used. Wherein, the processor 501 is used to: obtain a frame of preview image collected by the camera 506 of the mobile terminal; calculate the environmental color temperature value of the environment where the mobile terminal is located based on the preview image; The target supplementary light to be activated in the light 507; the target supplementary light is controlled to perform supplementary light; wherein, the color temperature values of at least two supplementary lights are different.

The methods disclosed in the foregoing embodiments of the present invention may be applied to the processor 501 or implemented by the processor 501 . The processor 501 may be an integrated circuit chip and has signal processing capabilities. In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in the processor 501 or instructions in the form of software. The above-mentioned processor 501 may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other possible Program logic devices, discrete gate or transistor logic devices, discrete hardware components. Various methods, steps and logic block diagrams disclosed in the embodiments of the present invention may be implemented or executed. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like. The steps of the methods disclosed in the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register. The storage medium is located in the memory 502, and the processor 501 reads the information in the memory 502, and completes the steps of the above method in combination with its hardware. In addition, the memory 502 stores correspondences and the like used in the above methods.

It can be understood that the embodiments described in the embodiments of the present invention may be implemented by hardware, software, firmware, middleware, microcode or a combination thereof. For hardware implementation, the processing unit can be implemented in one or more application specific integrated circuits (Application Specific Integrated Circuit, ASIC), digital signal processor (Digital Signal Processor, DSP), digital signal processing device (DSP Device, DSPD), programmable logic Equipment (ProgrammableLogic Device, PLD), Field Programmable Gate Array (Field Programmable Gate Array, FPGA), general-purpose processor, controller, microcontroller, microprocessor, other electronic units for performing the functions of this application, or a combination thereof middle.

For software implementation, the technology of the embodiments of the present invention can be implemented through modules (such as procedures, functions, etc.) that execute the functions of the embodiments of the present invention. Software codes can be stored in memory and executed by a processor. Memory can be implemented within the processor or external to the processor.

Optionally, the processor 501 is further configured to: acquire RGB information of the preview image; and calculate an ambient color temperature value of an environment where the mobile terminal is located based on the RGB information and an automatic white balance algorithm.

Optionally, as another embodiment, the mobile terminal includes a first supplementary light with a first color temperature value, a second supplementary light with a second color temperature value, and a third supplementary light with a third color temperature value, wherein , the first color temperature value is smaller than the second color temperature value, and the second color temperature value is smaller than the third color temperature value.

Optionally, as another embodiment, the processor 501 is further configured to: if the ambient color temperature value is greater than the preset first color temperature threshold, determine that the target supplementary light to be activated is the third supplementary light.

Optionally, as another embodiment, the processor 501 is further configured to: if the ambient color temperature value is greater than the preset second color temperature threshold and smaller than the first color temperature threshold, determine that the target fill light to be activated is the second fill light light and a third fill light.

Optionally, as another embodiment, the processor 501 is further configured to: if the ambient color temperature value is greater than the preset third color temperature threshold and smaller than the second color temperature threshold, determine that the target fill light to be activated is the first fill light light and a second fill light.

Optionally, as another embodiment, the processor 501 is further configured to: if the ambient color temperature value is less than the third color temperature threshold, determine that the target supplementary light to be activated is the first supplementary light.

Optionally, as another embodiment, the processor 501 is further configured to: calculate the ambient brightness value of the environment where the mobile terminal is located based on the preview image; according to the ambient brightness value and the preset relationship between the ambient brightness value and the fill light current, Determine the fill light current of the target fill light; wherein, the ambient brightness value is inversely correlated with the fill light current.

Optionally, as another embodiment, the processor 501 is further configured to: acquire an exposure time value, an exposure gain value, and an image brightness value of the preview image; calculate an exposure index based on the exposure time value and the exposure gain value; calculate an exposure index based on the exposure index and The brightness value of the image is used to calculate the ambient brightness value of the environment where the mobile terminal is located.

Optionally, as another embodiment, the processor 501 is further configured to: control the target fill light to perform fill light according to the current of the fill light.

The mobile terminal 500 can implement various processes implemented by the mobile terminal in the foregoing embodiments, and to avoid repetition, details are not repeated here.

The mobile terminal provided in the above-mentioned embodiments of the present invention determines the target supplementary light to be activated among the at least two supplementary lights of the mobile terminal through the ambient color temperature value of the environment where the mobile terminal is located, and then The ambient brightness value of the environment is used to determine the fill light current of the target fill light, and finally the target fill light is controlled to perform fill light according to the fill light current. In this way, in this embodiment, when the mobile terminal is taking pictures, the target supplementary light can emit the color temperature closest to the ambient color temperature of the environment where the mobile terminal is located, and emit the brightness closest to the ambient brightness, which solves the problem of mobile terminals in the prior art. The brightness and color temperature of the fill light are fixed values. The fill light effect of the fill light will change with the environment where the mobile terminal is located, and the fill light color of the fill light does not match the environment. The terminal can take pictures with better effects according to the fill light effect of the target fill light, which improves the user experience.

Fifth embodiment:

Fig. 6 shows a block diagram of a mobile terminal in a fifth embodiment of the present invention. Specifically, the mobile terminal 600 in FIG. 6 may be a mobile phone, a tablet computer, a personal digital assistant (Personal Digital Assistant, PDA), or a vehicle-mounted computer.

Mobile terminal 600 in Fig. 6 comprises radio frequency (Radio Frequency, RF) circuit 610, memory 620, input unit 630, display unit 640, processor 660, audio circuit 670, WiFi (Wireless Fidelity) module 680, power supply 690, camera 6100 and at least two fill lights 6110.

Wherein, the input unit 630 can be used to receive number or character information input by the user, and generate signal input related to the user setting and function control of the mobile terminal 600 . Specifically, in the embodiment of the present invention, the input unit 630 may include a touch panel 631 . The touch panel 631, also referred to as a touch screen, can collect user's touch operations on or near it (such as the user's operation on the touch panel 631 using any suitable object or accessory such as a finger, a stylus), and The specified program drives the corresponding connected device. Optionally, the touch panel 631 may include two parts, a touch detection device and a touch controller. Among them, the touch detection device detects the user's touch orientation, and detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into contact coordinates, and sends it to the to the processor 660, and can receive and execute commands sent by the processor 660. In addition, the touch panel 631 can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch panel 631, the input unit 630 may also include other input devices 632, which may include but not limited to physical keyboards, function keys (such as volume control buttons, switch buttons, etc.), trackballs, mice, joysticks, etc. one or more of.

Wherein, the display unit 640 can be used to display information input by the user or information provided to the user and various menu interfaces of the mobile terminal 600 . The display unit 640 may include a display panel 641. Optionally, the display panel 641 may be configured in the form of an LCD or an organic light-emitting diode (Organic Light-Emitting Diode, OLED).

It should be noted that the touch panel 631 can cover the display panel 641 to form a touch display screen. When the touch display screen detects a touch operation on or near it, it is sent to the processor 660 to determine the type of the touch event, and then the processor 660 provides corresponding visual output on the touch display screen according to the type of the touch event.

The touch display screen includes an application program interface display area and a common control display area. The arrangement of the display area of the application program interface and the display area of the commonly used controls is not limited, and may be an arrangement in which the two display areas can be distinguished, such as vertical arrangement, left-right arrangement, and the like. The application program interface display area can be used to display the interface of the application program. Each interface may include at least one interface element such as an icon of an application program and/or a widget desktop control. The application program interface display area can also be an empty interface without any content. The commonly used control display area is used to display controls with a high usage rate, for example, application icons such as setting buttons, interface numbers, scroll bars, and phonebook icons.

Wherein, the processor 660 is the control center of the mobile terminal 600, which uses various interfaces and lines to connect various parts of the entire mobile phone, and runs or executes the software programs and/or modules stored in the first memory 621, and calls the software programs stored in the first memory 621. The data in the second memory 622 executes various functions of the mobile terminal 600 and processes data, so as to monitor the mobile terminal 600 as a whole. Optionally, the processor 660 may include one or more processing units.

In the embodiment of the present invention, the software programs and/or modules in the first memory 621 and/or the data in the second memory 622 are stored by calling, wherein the first memory 621 includes setting modules and configuration files. The processor 660 is configured to: acquire a frame of preview image collected by the camera 6100 of the mobile terminal; calculate the ambient color temperature value of the environment where the mobile terminal is located based on the preview image; determine at least two fill lights of the mobile terminal based on the ambient color temperature value The target supplementary light to be activated in 6110; the target supplementary light is controlled to perform supplementary light; wherein, at least two supplementary lights have different color temperature values.

Optionally, the processor 660 is further configured to: acquire RGB information of the preview image; and calculate an ambient color temperature value of the environment where the mobile terminal is located based on the RGB information and an automatic white balance algorithm.

Optionally, as another embodiment, the mobile terminal includes a first supplementary light with a first color temperature value, a second supplementary light with a second color temperature value, and a third supplementary light with a third color temperature value, wherein , the first color temperature value is smaller than the second color temperature value, and the second color temperature value is smaller than the third color temperature value.

Optionally, as another embodiment, the processor 660 is further configured to: if the ambient color temperature value is greater than the preset first color temperature threshold, determine that the target supplementary light to be activated is the third supplementary light.

Optionally, as another embodiment, the processor 660 is further configured to: if the ambient color temperature value is greater than the preset second color temperature threshold and smaller than the first color temperature threshold, determine that the target fill light to be activated is the second fill light light and a third fill light.

Optionally, as another embodiment, the processor 660 is further configured to: if the ambient color temperature value is greater than the preset third color temperature threshold and smaller than the second color temperature threshold, determine that the target fill light to be activated is the first fill light light and a second fill light.

Optionally, as another embodiment, the processor 660 is further configured to: if the ambient color temperature value is less than the third color temperature threshold, determine that the target supplementary light to be activated is the first supplementary light.

Optionally, as another embodiment, the processor 660 is further configured to: calculate the ambient brightness value of the environment where the mobile terminal is located based on the preview image; according to the ambient brightness value and the preset relationship between the ambient brightness value and the fill light current, Determine the fill light current of the target fill light; wherein, the ambient brightness value is inversely correlated with the fill light current.

Optionally, as another embodiment, the processor 660 is further configured to: acquire an exposure time value, an exposure gain value, and an image brightness value of the preview image; calculate an exposure index based on the exposure time value and the exposure gain value; calculate an exposure index based on the exposure index and The brightness value of the image is used to calculate the ambient brightness value of the environment where the mobile terminal is located.

Optionally, as another embodiment, the processor 660 is further configured to: control the target fill light to perform fill light according to the current of the fill light.

The mobile terminal provided in the above-mentioned embodiments of the present invention determines the target supplementary light to be activated among the at least two supplementary lights of the mobile terminal through the ambient color temperature value of the environment where the mobile terminal is located, and then The ambient brightness value of the environment is used to determine the fill light current of the target fill light, and finally the target fill light is controlled to perform fill light according to the fill light current. In this way, in this embodiment, when the mobile terminal is taking pictures, the target supplementary light can emit the color temperature closest to the ambient color temperature of the environment where the mobile terminal is located, and emit the brightness closest to the ambient brightness, which solves the problem of mobile terminals in the prior art. The brightness and color temperature of the fill light are fixed values. The fill light effect of the fill light will change with the environment where the mobile terminal is located, and the fill light color of the fill light does not match the environment. The terminal can take pictures with better effects according to the fill light effect of the target fill light, which improves the user experience.

The mobile terminal 600 can implement various processes implemented by the mobile terminal in the foregoing embodiments, and to avoid repetition, details are not repeated here.

Those of ordinary skill in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed in the embodiments of the present invention can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present invention.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the embodiments provided in this application, it should be understood that the disclosed devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated. to another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

A unit described as a separate component may or may not be physically separated, and a component displayed as a unit may or may not be a physical unit, that is, it may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment of the present invention.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.

If the functions are realized in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods in various embodiments of the present invention. The aforementioned storage medium includes: various media capable of storing program codes such as U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone familiar with the technical field can easily think of changes or replacements within the technical scope disclosed in the present invention, and should cover all Within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (20)

1. take pictures the method for light filling, be applied to mobile terminal, it is characterised in that described method includes:

Obtain the frame preview image that the photographic head of described mobile terminal is gathered；

Based on described preview image, calculate the ambient color temperature value of described mobile terminal local environment；

Based on described ambient color temperature value, determine target light compensating lamp to be launched at least two light compensating lamp of described mobile terminal；

Control described target light compensating lamp and carry out light filling；

Wherein, the color temperature value of described at least two light compensating lamp is the most different.

Method the most according to claim 1, it is characterised in that described based on described preview image, calculates described mobile whole The step of the ambient color temperature value of end local environment, including:

Obtain the RGB information of described preview image；

Based on described RGB information and AWB algorithm, it is calculated the ambient color temperature value of described mobile terminal local environment.

Method the most according to claim 1, it is characterised in that described mobile terminal includes having the first of the first color temperature value Light compensating lamp, there is the second light compensating lamp of the second color temperature value and there is the 3rd light compensating lamp of tertiary color temperature value, wherein, described first color Temperature value is less than described second color temperature value, and described second color temperature value is less than described tertiary color temperature value.

Method the most according to claim 3, it is characterised in that described based on described ambient color temperature value, determines described movement The step of target light compensating lamp to be launched at least two light compensating lamp of terminal, including:

If described ambient color temperature value is more than the first colour temperature threshold value preset, it is determined that target light compensating lamp to be launched is the described 3rd Light compensating lamp.

Method the most according to claim 4, it is characterised in that described based on described ambient color temperature value, determines described movement The step of target light compensating lamp to be launched at least two light compensating lamp of terminal, including:

If described ambient color temperature value is more than the second colour temperature threshold value preset and less than described first colour temperature threshold value, it is determined that to be launched Target light compensating lamp be described second light compensating lamp and described 3rd light compensating lamp.

Method the most according to claim 5, it is characterised in that described based on described ambient color temperature value, determines described movement The step of target light compensating lamp to be launched at least two light compensating lamp of terminal, including:

If described ambient color temperature value is more than the tertiary color temperature threshold value preset and less than described second colour temperature threshold value, it is determined that to be launched Target light compensating lamp be described first light compensating lamp and described second light compensating lamp.

Method the most according to claim 6, it is characterised in that described based on described ambient color temperature value, determines described movement The step of target light compensating lamp to be launched at least two light compensating lamp of terminal, including:

If described ambient color temperature value is less than described tertiary color temperature threshold value, it is determined that target light compensating lamp to be launched is described first benefit Light modulation.

Method the most according to claim 1, it is characterised in that described based on described ambient color temperature value, determines described movement After the step of target light compensating lamp to be launched at least two light compensating lamp of terminal, described method also includes:

Based on described preview image, calculate the ambient brightness value of described mobile terminal local environment；

According to described ambient brightness value and ambient brightness value and the preset relation of light compensating lamp electric current, determine described target light compensating lamp Light compensating lamp electric current；

Wherein, described ambient brightness value is closed with described light compensating lamp anti-phase.

Method the most according to claim 8, it is characterised in that described based on described preview image, calculates described mobile whole The step of the ambient brightness value of end local environment, including:

Obtain the exposure time values of described preview image, exposure gain value and image brightness values；

Based on described exposure time values and exposure gain value, calculate exposure index；

Based on described exposure index and image brightness values, calculate the ambient brightness value of described mobile terminal local environment.

Method the most according to claim 8, it is characterised in that described control described target light compensating lamp carries out the step of light filling Suddenly, including:

Control described target light compensating lamp and carry out light filling according to described light compensating lamp electric current.

11. 1 kinds of mobile terminals, including photographic head and at least two light compensating lamp, it is characterised in that described mobile terminal also includes:

Acquisition module, for obtaining the frame preview image that the photographic head of described mobile terminal is gathered；

First computing module, for the described preview image obtained based on described acquisition module, calculates residing for described mobile terminal The ambient color temperature value of environment；

First determines module, for based on described first computing module calculated ambient color temperature value, determines described mobile whole Target light compensating lamp to be launched at least two light compensating lamp of end；

For controlling described first, control module, determines that the target light compensating lamp that module determines carries out light filling；Wherein, described at least two The color temperature value of individual light compensating lamp is the most different.

12. mobile terminals according to claim 11, it is characterised in that described first computing module includes:

First acquiring unit, for obtaining the RGB information of described preview image；

First computing unit, for the RGB information obtained based on described first acquiring unit and AWB algorithm, calculates Ambient color temperature value to described mobile terminal local environment.

13. mobile terminals according to claim 11, it is characterised in that described mobile terminal includes having the first color temperature value The first light compensating lamp, there is the second light compensating lamp of the second color temperature value and there is the 3rd light compensating lamp of tertiary color temperature value, wherein, described First color temperature value is less than described second color temperature value, and described second color temperature value is less than described tertiary color temperature value.

14. mobile terminals according to claim 13, it is characterised in that described first determine module for, if described ring Border color temperature value is more than the first colour temperature threshold value preset, it is determined that target light compensating lamp to be launched is described 3rd light compensating lamp.

15. mobile terminals according to claim 14, it is characterised in that described first determine module for, if described ring Border color temperature value is more than the second colour temperature threshold value preset and less than described first colour temperature threshold value, it is determined that target light compensating lamp to be launched For described second light compensating lamp and described 3rd light compensating lamp.

16. mobile terminals according to claim 15, it is characterised in that described first determine module for, if described ring Border color temperature value is more than the tertiary color temperature threshold value preset and less than described second colour temperature threshold value, it is determined that target light compensating lamp to be launched For described first light compensating lamp and described second light compensating lamp.

17. mobile terminals according to claim 16, it is characterised in that described first determine module for, if described ring Border color temperature value is less than described tertiary color temperature threshold value, it is determined that target light compensating lamp to be launched is described first light compensating lamp.

18. mobile terminals according to claim 11, it is characterised in that described mobile terminal also includes:

Second computing module, for the described preview image obtained based on described acquisition module, calculates residing for described mobile terminal The ambient brightness value of environment；

Second determines module, for according to the described second calculated ambient brightness value of computing module and ambient brightness value with The preset relation of light compensating lamp electric current, determines the light compensating lamp electric current of described target light compensating lamp；Wherein, described ambient brightness value is with described Light compensating lamp anti-phase closes.

19. mobile terminals according to claim 18, it is characterised in that described second computing module includes:

Second acquisition unit, for obtaining the exposure time values of described preview image, exposure gain value and image brightness values；

Second computing unit, for based on described exposure time values and exposure gain value, calculates exposure index；

3rd computing unit, for based on described exposure index and image brightness values, calculates described mobile terminal local environment Ambient brightness value.

20. mobile terminals according to claim 18, it is characterised in that described control module is used for, control described target According to described second, light compensating lamp determines that the described light compensating lamp electric current that module determines carries out light filling.