CN111492653A - Method and device for quickly adjusting white balance of camera and computer readable storage medium - Google Patents
Method and device for quickly adjusting white balance of camera and computer readable storage medium Download PDFInfo
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- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/80—Camera processing pipelines; Components thereof
- H04N23/84—Camera processing pipelines; Components thereof for processing colour signals
- H04N23/88—Camera processing pipelines; Components thereof for processing colour signals for colour balance, e.g. white-balance circuits or colour temperature control
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a method for quickly adjusting white balance of a camera, which comprises the steps of acquiring color temperature information of the current environment of a mobile terminal in real time through a color temperature sensor, and acquiring corresponding white balance parameters according to the color temperature information; then loading the white balance parameters when the camera function of the mobile terminal is started; and then adjusting the imaging effect of the camera based on the white balance parameter. The invention also discloses a device for quickly adjusting the white balance of the camera and a computer readable storage medium. The method acquires the color temperature information of the current environment before entering the camera picture of the terminal, effectively shortens the adjustment time of automatic white balance after entering the camera picture, improves the user experience, and can acquire the color temperature information through the color temperature sensor, thereby reducing the power consumption of the mobile phone.
Description
Technical Field
The present invention relates to the field of image processing technologies, and in particular, to a method and an apparatus for quickly adjusting a white balance of a camera, and a computer-readable storage medium.
Background
The automatic white balance function is common in cameras, mainly related to color temperature, and aims to enable a photographic system to obtain accurate color restoration under different illumination conditions, namely, under different light conditions, the proportions of three primary colors of red, green and blue are adjusted to enable the mixed colors to become white. When the white balance is not well set, the conditions that the image shot in a room of a fluorescent lamp appears green, the scenery shot under indoor tungsten filament light is yellowish and the like often occur. The automatic white balance function can actively adjust white balance parameters when the environmental color temperature shot by the camera changes, so that the camera image does not have color cast due to the change of the environmental color temperature.
When the current mobile phone camera enters the camera function, because the camera does not capture the color of the current environment, the process of color adjustment can occur in the photographed picture at the moment, multi-frame pictures are captured, the current color temperature information is obtained from picture statistics, and corresponding automatic white balance parameters are set. Because a plurality of frames are needed for acquiring the current color temperature information, the white balance speed of the camera becomes slow, the camera cannot shoot in time, and a lot of wonderful moments can be missed to influence the user experience.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a method and a device for quickly adjusting the white balance of a camera and a computer readable storage medium, and aims to solve the technical problem that the parameter adjustment time is long after a camera enters a camera interface.
In order to achieve the above object, the present invention provides a method for quickly adjusting a white balance of a camera, including the steps of:
the method comprises the steps that color temperature information of the current environment of the mobile terminal is obtained in real time through a color temperature sensor, and corresponding white balance parameters are obtained according to the color temperature information;
loading the white balance parameters when a camera function of the mobile terminal is started;
adjusting an imaging effect of the camera based on the white balance parameter.
Preferably, before the step of acquiring color temperature information of the current environment of the mobile terminal in real time by using the color temperature sensor, the method further includes:
and calibrating and storing the white balance parameters corresponding to the color temperature values so that the mobile terminal can obtain the corresponding white balance parameters according to the color temperature information.
Preferably, the step of acquiring color temperature information of the current environment of the mobile terminal in real time through a color temperature sensor and acquiring corresponding white balance parameters according to the color temperature information includes:
acquiring current R/G information and B/G information of the mobile terminal in real time through a color temperature sensor;
acquiring corresponding color temperature information based on the R/G information and the B/G information;
and acquiring corresponding white balance parameters based on the color temperature information.
Preferably, the step of acquiring the current R/G information and B/G information of the mobile terminal in real time through the color temperature sensor includes:
capturing a picture with a preset frame number through a color temperature sensor in the current environment;
and counting R/G information and B/G information corresponding to the pictures based on the captured pictures with the preset frame number.
Preferably, the step of loading the white balance parameter when the camera function of the mobile terminal is started comprises:
when an instruction for starting a camera function is acquired, starting a camera according to the instruction;
and when the camera is started, loading the white balance parameters to a photo preview interface.
Preferably, the adjusting of the imaging effect of the camera based on the white balance parameter includes:
completing corresponding white balance setting based on the white balance parameters;
and performing automatic white balance preview adjustment on the current photographing picture based on the white balance setting.
Preferably, after the step of adjusting the imaging effect of the camera based on the white balance parameter, the method further comprises:
and when a photographic picture is acquired, applying the white balance parameters to the photographic picture.
Preferably, after the step of adjusting the imaging effect of the camera based on the white balance parameter, the method further comprises:
displaying the white balance parameter on a display screen of the mobile terminal;
and determining the current shooting mode according to the white balance parameters.
In addition, in order to achieve the above object, the present invention further provides a fast white balance adjustment device for a camera, which is characterized in that the fast white balance adjustment device for a camera comprises a color temperature sensor disposed around a lens; the device for rapidly adjusting the white balance of the camera further comprises: the system comprises a memory, a processor and a camera white balance quick adjustment program stored on the memory and capable of running on the processor, wherein when the camera white balance quick adjustment program is executed by the processor, the steps of the camera white balance quick adjustment method are realized.
In addition, to achieve the above object, the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores thereon a camera white balance quick adjustment program, and the camera white balance quick adjustment program, when executed by a processor, implements the steps of the camera white balance quick adjustment method according to any one of the above aspects.
According to the scheme, the color temperature information of the current environment of the mobile terminal is acquired in real time through a color temperature sensor, and corresponding white balance parameters are acquired according to the color temperature information; then loading the white balance parameters when the camera function of the mobile terminal is started; and then adjusting the imaging effect of the camera based on the white balance parameter. The invention also discloses a device for quickly adjusting the white balance of the camera and a computer readable storage medium. The method acquires the color temperature information of the current environment before entering the camera picture of the terminal, effectively shortens the adjustment time of automatic white balance after entering the camera picture, improves the user experience, and can acquire the color temperature information through the color temperature sensor, thereby reducing the power consumption of the mobile phone.
Drawings
Fig. 1 is a schematic structural diagram of a terminal to which a device for quickly adjusting white balance of a camera in a hardware operating environment according to an embodiment of the present invention belongs;
FIG. 2 is a flowchart illustrating a method for adjusting white balance of a camera according to a first embodiment of the present invention;
FIG. 3 is a flowchart illustrating a second embodiment of a method for fast adjusting white balance of a camera according to the present invention;
FIG. 4 is a detailed flowchart of the steps of acquiring color temperature information of the current environment of the mobile terminal in real time by a color temperature sensor and acquiring corresponding white balance parameters according to the color temperature information according to the third embodiment of the method for rapidly adjusting the white balance of the camera according to the present invention;
FIG. 5 is a flowchart illustrating a detailed process of the step of acquiring the current R/G information and B/G information of the mobile terminal in real time by the color temperature sensor according to the fourth embodiment of the method for rapidly adjusting the white balance of the camera according to the present invention;
fig. 6 is a detailed flowchart of the step of loading the white balance parameters when the camera function of the mobile terminal is started in the fifth embodiment of the method for rapidly adjusting the white balance of the camera according to the present invention;
fig. 7 is a flowchart illustrating a detailed process of adjusting the imaging effect of the camera based on the white balance parameter according to a sixth embodiment of the method for rapidly adjusting the white balance of the camera according to the present invention;
fig. 8 is a flowchart illustrating a method for rapidly adjusting white balance of a camera according to a seventh embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, fig. 1 is a schematic terminal structure diagram of a hardware operating environment according to an embodiment of the present invention.
The terminal of the embodiment of the invention can be a PC, and can also be a mobile terminal device with a display function, such as a smart phone, a tablet computer, an electronic book reader, an MP3 (Moving Picture experts Group Audio L layer III, motion Picture experts compression standard Audio layer 3) player, an MP4 (Moving Picture experts Group Audio L layer IV, motion Picture experts compression standard Audio layer 3) player, a portable computer, and the like.
As shown in fig. 1, the terminal may include: a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, a communication bus 1002. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the processor 1001.
Optionally, the terminal may further include a camera, a Radio Frequency (RF) circuit, a sensor, an audio circuit, a WiFi module, and the like. Such as light sensors, motion sensors, and other sensors. Specifically, the light sensor may include an ambient light sensor that may adjust the brightness of the display screen according to the brightness of ambient light, and a proximity sensor that may turn off the display screen and/or the backlight when the mobile terminal is moved to the ear. As one of the motion sensors, the gravity acceleration sensor can detect the magnitude of acceleration in each direction (generally, three axes), detect the magnitude and direction of gravity when the mobile terminal is stationary, and can be used for applications (such as horizontal and vertical screen switching, related games, magnetometer attitude calibration), vibration recognition related functions (such as pedometer and tapping) and the like for recognizing the attitude of the mobile terminal; of course, the mobile terminal may also be configured with other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which are not described herein again.
Those skilled in the art will appreciate that the terminal structure shown in fig. 1 is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a kind of computer storage medium, may include therein an operating system, a network communication module, a user interface module, and a camera white balance quick adjustment program.
In the terminal shown in fig. 1, the network interface 1004 is mainly used for connecting to a backend server and performing data communication with the backend server; the user interface 1003 is mainly used for connecting a client (user side) and performing data communication with the client; and the processor 1001 may be used to invoke a camera white balance quick adjustment program stored in the memory 1005.
In this embodiment, the fast white balance adjustment device for a camera includes: a memory 1005, a processor 1001 and a camera white balance quick adjustment program stored on the memory 1005 and executable on the processor 1001, wherein the processor 1001 calls the camera white balance quick adjustment program stored in the memory 1005 and executes the following operations:
the method comprises the steps that color temperature information of the current environment of the mobile terminal is obtained in real time through a color temperature sensor, and corresponding white balance parameters are obtained according to the color temperature information;
loading the white balance parameters when a camera function of the mobile terminal is started;
adjusting an imaging effect of the camera based on the white balance parameter.
Further, the processor 1001 may call the camera white balance quick adjustment program stored in the memory 1005, and also perform the following operations:
and calibrating and storing the white balance parameters corresponding to the color temperature values so that the mobile terminal can obtain the corresponding white balance parameters according to the color temperature information.
Further, the processor 1001 may call the camera white balance quick adjustment program stored in the memory 1005, and also perform the following operations:
acquiring current R/G information and B/G information of the mobile terminal in real time through a color temperature sensor;
acquiring corresponding color temperature information based on the R/G information and the B/G information;
and acquiring corresponding white balance parameters based on the color temperature information.
Further, the processor 1001 may call the camera white balance quick adjustment program stored in the memory 1005, and also perform the following operations:
capturing a picture with a preset frame number through a color temperature sensor in the current environment;
and counting R/G information and B/G information corresponding to the pictures based on the captured pictures with the preset frame number.
Further, the processor 1001 may call the camera white balance quick adjustment program stored in the memory 1005, and also perform the following operations:
when an instruction for starting a camera function is acquired, starting a camera according to the instruction;
and when the camera is started, loading the white balance parameters to a photo preview interface.
Further, the processor 1001 may call the camera white balance quick adjustment program stored in the memory 1005, and also perform the following operations:
completing corresponding white balance setting based on the white balance parameters;
and performing automatic white balance preview adjustment on the current photographing picture based on the white balance setting.
Further, the processor 1001 may call the camera white balance quick adjustment program stored in the memory 1005, and also perform the following operations:
and when a photographic picture is acquired, applying the white balance parameters to the photographic picture.
Further, the processor 1001 may call the camera white balance quick adjustment program stored in the memory 1005, and also perform the following operations:
displaying the white balance parameter on a display screen of the mobile terminal;
and determining the current shooting mode according to the white balance parameters.
A first embodiment of the present invention provides a method for quickly adjusting a white balance of a camera, and referring to fig. 2, fig. 2 is a schematic flow chart of a first embodiment of the method for quickly adjusting a white balance of a camera according to the present invention, where the method for quickly adjusting a white balance of a camera includes:
step S100, acquiring color temperature information of the current environment of the mobile terminal in real time through a color temperature sensor, and acquiring corresponding white balance parameters according to the color temperature information;
the color temperature sensor can accurately and stably work in the image processing process of the mobile terminal, and is mainly used for detecting the color temperature of the current environment of the terminal so as to enable the color temperature of a camera picture to be consistent with the ambient light level, and therefore stable screen color temperature and accurate image color can be obtained. The concept of color temperature is an important part of the field of photography and light sources are always defined according to their color temperature, the most important of the properties of light for the photographer is the intensity of the light, and secondly the color temperature. The human eye can automatically adjust the white balance so that a piece of paper is white when viewed in the sun and white when viewed in the night room under light, but if we take the same type of film in both environments, the real difference will be displayed, which is why the film is sold in the sun and in the tungsten filament light. It is a great advantage that the color temperature response of the film is fixed, while the color temperature response of the image sensor is variable. The unit of the color temperature is kelvin. The relationship between color and kelvin temperature originates from a black body radiator, which is heated until it emits light, and the color that appears at different temperatures is the color temperature. When the black object starts to glow after heating, it turns dark red, yellow if heating continues, then white, and finally blue.
Color temperature is a problem for digital cameras as to white balance. Photographs taken under different light conditions will have different color temperatures. That is, the color of the object may change under various light conditions. In this respect, white objects change most significantly: under the indoor tungsten filament light, a white object looks orange, and the scene shot under the illumination condition is yellow; however, if it is under blue sky, it will have a blue color tone. A scene photographed under such lighting conditions may be bluish. For these deviations, the human eye can automatically correct them. However, since the color temperature sensor itself does not have such a function, it is necessary to perform a certain correction of the output signal thereof, which is called white balance.
The automatic white balance function of the camera can automatically detect the color temperature change of natural light in one day and automatically fine-tune the white balance of the camera according to the detection result so as to adapt to the color temperature change of a natural light source. In the outdoor with sufficient light, good imaging effect can be generally obtained by using the function, but in the occasions that the color temperature of light exceeds the automatic control range or some light is complex, the accuracy of automatic white balance adjustment can be influenced, the reduction degree is not too high, and the color of a shot image can have obvious color cast distortion.
When the camera function is not started, acquiring R/G and B/G information of the current environment in real time through a color temperature sensor integrated near a camera lens, wherein in general, the higher the color temperature is, the larger the B/G is, and the bluer the B/G is; a lower color temperature means a higher R/G, which indicates a redder color. And calculating the color temperature information of the current environment according to the acquired R/G and B/G information, and storing the color temperature information in the terminal for immediate use when photographing or shooting. And when the current environment is changed, replacing the primary color temperature information with the color temperature information of the current environment and storing new color temperature information of the current environment. And setting corresponding automatic white balance AWB parameters according to the color temperature information acquired by the color temperature sensor in real time, wherein the specific AWB parameters comprise parameters of three channels of R, G and B, and applying the AWB parameters to a camera shooting preview picture to finish automatic white balance adjustment of the camera preview picture.
Step S200, loading the white balance parameters when the camera function of the mobile terminal is started;
when the terminal acquires an instruction for starting the camera function, a camera photographing interface is displayed, and white balance parameters converted from color temperature information acquired by the color temperature sensor in real time are called.
In this embodiment, the terminal may be a mobile terminal or a fixed terminal, the mobile terminal includes various image capturing devices and various mobile devices with image capturing and shooting functions, such as a smart phone, a single-lens reflex camera, a video camera, and the like, and the fixed device may be various fixed devices with image capturing and shooting functions, such as a camera of a desktop computer.
And step S300, adjusting the imaging effect of the camera based on the white balance parameters.
And setting corresponding automatic white balance AWB parameters according to the color temperature information acquired by the color temperature sensor in real time, wherein the specific AWB parameters comprise parameters of three channels of R, G and B, and applying the AWB parameters to a camera shooting preview picture to finish automatic white balance adjustment of the camera preview picture.
Further, in an embodiment, after step S30, the method further includes:
and when the photographic picture is acquired, applying the white balance parameters to the photo or the image picture.
The AWB parameter obtained according to the color temperature information is not only applied to a preview picture shot by a camera, so that a user can see the effect of taking a picture in the current environment by naked eyes, but also applied to a picture of a shot picture or image, so that the picture or image obtained by the user is consistent with the picture or image seen in the preview picture.
The method for rapidly adjusting the white balance of the camera provided by the embodiment comprises the steps of acquiring color temperature information of the current environment of the mobile terminal in real time through a color temperature sensor, and acquiring corresponding white balance parameters according to the color temperature information; then loading the white balance parameters when the camera function of the mobile terminal is started; then adjusting the imaging effect of the camera based on the white balance parameter; the method acquires the color temperature information of the current environment before entering the camera picture of the terminal, effectively shortens the adjustment time of automatic white balance after entering the camera picture, improves the user experience, and can acquire the color temperature information through the color temperature sensor, thereby reducing the power consumption of the mobile phone.
Based on the first embodiment, a second embodiment of the method for quickly adjusting white balance of a camera according to the present invention is provided, and referring to fig. 3, before step S100, the method further includes:
and step S400, calibrating and storing the white balance parameters corresponding to the color temperature values so that the mobile terminal can obtain the corresponding white balance parameters according to the color temperature information.
Before the camera function is started, the white balance parameters corresponding to the color temperature values need to be calibrated in advance, specifically, the color temperature values in the common range are obtained, and then the white balance AWB parameters, that is, the parameter values of the three color channels R, G, and B, are obtained by calibrating the white balance, wherein the process of calibrating the white balance is to make the white light present a standard white color by adjusting the parameter values of the three channels, that is, to make the three primary colors in the white color detected by the color temperature sensor equal. And storing the white balance parameter values corresponding to the color temperature values when the white balance parameter values are obtained.
According to the obtained color temperature values, the R/G/B three channels of the current ambient light can be respectively averaged, and then the ranges of the R/G parameters and the B/G parameters are obtained.
In the method for quickly adjusting the white balance of the camera provided by the embodiment, the white balance parameters corresponding to the color temperature values are calibrated and stored; then obtaining the range of R/G parameters and B/G parameters corresponding to each color temperature value; before the camera function is started, the automatic white balance parameters corresponding to each color temperature, and the R/G parameters and the B/G parameters corresponding to each color temperature are obtained, and the corresponding automatic white balance compensation parameters can be set immediately after the camera is started according to the color temperature information, so that the speed of initializing and adjusting the automatic white balance is increased, and the adjusting efficiency is improved.
Based on the first embodiment, a third embodiment of the method for quickly adjusting the white balance of a camera according to the present invention is provided, and referring to fig. 4, step S100 includes:
step S110, acquiring current R/G information and B/G information of the mobile terminal in real time through a color temperature sensor;
when the camera function is not started, the current R/G information and B/G information can be acquired in real time through the color temperature sensor. The higher the color temperature, the larger the B/G, which means the blueness; a lower color temperature means a higher R/G, which indicates a redder color.
The color temperature sensor can accurately and stably work in the image processing process of the mobile terminal, and is mainly used for detecting the color temperature of the current environment of the terminal so as to enable the color temperature of a camera picture to be consistent with the ambient light level, and therefore stable screen color temperature and accurate image color can be obtained. The concept of color temperature is an important part of the field of photography and light sources are always defined according to their color temperature, the most important of the properties of light for the photographer is the intensity of the light, and secondly the color temperature. The human eye can automatically adjust the white balance so that a piece of paper is white when viewed in the sun and white when viewed in the night room under light, but if we take the same type of film in both environments, the real difference will be displayed, which is why the film is sold in the sun and in the tungsten filament light. It is a great advantage that the color temperature response of the film is fixed, while the color temperature response of the image sensor is variable. The unit of the color temperature is kelvin. The relationship between color and kelvin temperature originates from a black body radiator, which is heated until it emits light, and the color that appears at different temperatures is the color temperature. When the black object starts to glow after heating, it turns dark red, yellow if heating continues, then white, and finally blue.
And step S120, acquiring corresponding color temperature information based on the R/G information and the B/G information.
And calculating color temperature information corresponding to the current R/G information and B/G information according to the existing data of the R/G information and the B/G information corresponding to each color temperature value, so that the corresponding automatic white balance parameters can be set through the color temperature information immediately after the camera is started.
And step S130, acquiring corresponding white balance parameters based on the color temperature information.
When the camera function is not started, acquiring R/G and B/G information of the current environment in real time through a color temperature sensor integrated near a camera lens, wherein in general, the higher the color temperature is, the larger the B/G is, and the bluer the B/G is; a lower color temperature means a higher R/G, which indicates a redder color. And calculating the color temperature information of the current environment according to the acquired R/G and B/G information, and storing the color temperature information in the terminal for immediate use when photographing or shooting. And when the current environment is changed, replacing the primary color temperature information with the color temperature information of the current environment and storing new color temperature information of the current environment. And setting corresponding automatic white balance AWB parameters according to the color temperature information acquired by the color temperature sensor in real time, wherein the specific AWB parameters comprise parameters of three channels of R, G and B, and applying the AWB parameters to a camera shooting preview picture to finish automatic white balance adjustment of the camera preview picture.
The method for quickly adjusting the white balance of the camera provided by the embodiment acquires the current R/G information and B/G information of the terminal in real time through the color temperature sensor; then calculating and storing color temperature information corresponding to the R/G information and the B/G information; and according to the corresponding relation between each color temperature value which is calibrated and stored in the terminal and the R/G information and the B/G information, the R/G information and the B/G information are acquired in real time through the color temperature sensor, so that the color temperature information is obtained, a camera can further obtain white balance parameters, and a basis is provided for the subsequent white balance parameter setting.
Based on the third embodiment, a fourth embodiment of the method for quickly adjusting white balance of a camera according to the present invention is proposed, and referring to fig. 5, step S110 includes:
step S111, capturing a picture with a preset frame number through a color temperature sensor in the current environment;
the light sensitive chip CCD on the camera has numerous light sensitive units, which are covered with RED, GREEN and blue filters respectively and take the task of sensing the light of the three primary colors of RED, GREEN and blue, therefore, the light sensitive chip has RED, GREEN and blue light sensitive units, as long as the light energy of the RED, GREEN and blue light reflected by the scenery is adopted on the three light sensitive units of the light sensitive chip according to the real proportion, so that the three primary colors of RED, GREEN and blue are mixed to generate white, and a true restored color digital image can be obtained.
And step S112, counting R/G information and B/G information corresponding to the captured picture based on the preset frame number picture.
According to practical experience, the preset frame number generally refers to about 10 frames, and based on a plurality of captured frames, corresponding R/G information and B/G information are obtained from frame statistics, where R, G, and B are values of three color channels, R represents RED, G represents GREEN, and B represents blue B L UE, and the R/G information and the B/G information are value ratio information of each color channel.
In the method for quickly adjusting the white balance of the camera, the picture with the preset frame number is captured by the color temperature sensor in the current environment; then, based on the captured preset frame number picture, counting R/G information and B/G information corresponding to the picture; the R/G information and the B/G information can be obtained by capturing multi-frame images to count the multi-frame images, so that the color temperature value information can be obtained conveniently according to the R/G information and the B/G information, and the efficiency and the accuracy of white balance adjustment are ensured.
Based on the first embodiment, a fifth embodiment of the method for quickly adjusting white balance of a camera according to the present invention is proposed, and referring to fig. 6, step S200 includes:
step S210, when an instruction for starting the camera function is acquired, starting a camera according to the instruction;
when an instruction for starting the camera function is acquired, a shooting interface is displayed, the shooting interface comprises a preview frame of a picture to be shot, and a camera of the terminal is started at the same time, so that a shot object of an environment where a current lens is located can be acquired.
And step S220, loading the white balance parameters to a previewing interface when the camera is started.
The position of the color temperature sensor can be set by a user, the color temperature sensor is generally integrated around the camera, and some color temperature sensors are also arranged at the position of the flash lamp, so that the color temperature sensor can acquire the color temperature information of the current environment in real time. When a camera of the terminal is started, the color temperature information of the current environment is obtained through the color temperature sensor.
Color temperature is a problem for digital cameras as to white balance. Photographs taken under different light conditions will have different color temperatures. That is, the color of the object may change under various light conditions. In this respect, white objects change most significantly: under the indoor tungsten filament light, a white object looks orange, and the scene shot under the illumination condition is yellow; however, if it is under blue sky, it will have a blue color tone. A scene photographed under such lighting conditions may be bluish. For these deviations, the human eye can automatically correct them. However, since the color temperature sensor itself does not have such a function, it is necessary to perform a certain correction of the output signal thereof, which is called white balance.
The automatic white balance function of the camera can automatically detect the color temperature change of natural light in one day and automatically fine-tune the white balance of the camera according to the detection result so as to adapt to the color temperature change of a natural light source. In the outdoor with sufficient light, good imaging effect can be generally obtained by using the function, but in the occasions that the color temperature of light exceeds the automatic control range or some light is complex, the accuracy of automatic white balance adjustment can be influenced, the reduction degree is not too high, and the color of a shot image can have obvious color cast distortion.
According to the method for quickly adjusting the white balance of the camera, when an instruction for starting the camera function is obtained, a camera is started according to the instruction; then loading the white balance parameters to a previewing interface when the camera is started so that a user can observe the effect of the previewing interface after the white balance parameters are adjusted; according to the method, the color temperature information can be obtained immediately when the camera is started, instead of being obtained through multiple times of calibration after the camera is started, so that the color temperature information is obtained, the adjustment time of the camera during starting is saved, the situation that some wonderful moments are too fast to pass and are not too late to capture is avoided, and the user experience is effectively improved.
Based on the first embodiment, a sixth embodiment of the method for quickly adjusting white balance of a camera according to the present invention is provided, and referring to fig. 7, step S300 includes:
step S310, based on the white balance parameters, completing corresponding white balance setting;
since the data of the white balance parameters corresponding to the color temperature values are stored before the camera is started, the white balance parameters matched with the color temperature information can be acquired according to the color temperature information acquired by the color temperature sensor in real time when the camera is started.
The white balance parameters are also called AWB parameters or white balance compensation parameters, and are parameters for synthesizing different colors to restore real colors, mainly comprising the numerical values of three color channels R, G and B, wherein R represents RED RED, G represents GREEN GREEN, and B represents blue B L UE, the three colors are also called three primary colors.
Step S320, performing automatic white balance preview adjustment on the current picture based on the white balance setting;
after the camera function is started, the terminal may display a shooting interface, where the shooting interface includes a preview frame of a picture to be shot, that is, an imaging effect of a current environment. The obtained white balance parameters can be used for adjusting the white balance parameters of the current preview picture, so that the parameter values of the R, G and B color channels are integrated to restore the color effect of the current environment to the maximum extent. The balance of the current intensity of the three photosensitive units on the photosensitive chip is achieved by adjusting the electric frequency intensity of the three photosensitive units in the photosensitive chip, namely adjusting the photosensitive speed ISO of the three photosensitive units, so that the real color reduction of the digital image is realized.
In the method for quickly adjusting the white balance of the camera provided in the embodiment, the corresponding white balance setting is completed based on the white balance parameters; then, performing automatic white balance preview adjustment on the current photographing picture based on the white balance setting; the white balance adjustment of the picture can more accurately improve the reduction degree of the imaging color, obtain more real pictures or videos, ensure the shooting quality and effectively improve the user experience.
Based on the foregoing embodiments, a seventh embodiment of the fast adjusting method of white balance of camera of the present invention is proposed, and referring to fig. 8, in this embodiment, after step S300, the fast adjusting method of white balance of camera further includes:
and S500, displaying the white balance parameters on a display screen of the mobile terminal.
And when the terminal finishes the automatic white balance adjustment of the camera, sending a finishing signal, and when the terminal receives the finishing signal, displaying the current white balance parameters of the camera. The user can trigger a view white balance parameter instruction at the camera shooting interface to view the current white balance parameters of the camera.
The white balance parameter is the main reference data for realizing white balance control, and the white balance control is to make the color of a picture shot under various light conditions identical to the color of a scene seen by human eyes through image adjustment. The conventional digital cameras are provided with white balance sensors which are generally positioned around a lens. The white balance adjustment function provided by the digital camera is performed manually as well as automatically. Even if it is performed automatically, the correction capability is different. The white balance setting of the camera is an important quality parameter in the photographic function, and the white color is usually formed by mixing red, green and blue colors during imaging, so the white balance refers to the restoration of a white object by the digital camera, namely the accuracy of the obtained white color, the accuracy directly determines the color quality of a shot picture, and the working principle of the digital camera is that the induction intensity of each color of a photosensitive material is adjusted according to the difference of the color temperature of an ambient light source, so that the color is balanced. The color temperature is often influenced by the environment and the weather, and the artificial light source and the corresponding color temperature mainly comprise that the color temperature of the simulated blue day sunlight is 6500K, and the color temperature of the simulated north average sunlight is as follows: 7500K, the color temperature of the simulated sunlight is 5000K, the color temperature of the simulated shop light is 4000K, the color temperature of the tungsten filament lamp is 2700K, the color temperature corresponding to the common natural environment is basically in these ranges, such as sunny day, daytime, cloudy day, evening, night, etc.
And step S600, determining the current shooting mode according to the white balance parameters.
The specific form and number of the shooting modes can be set by a user, for example, the modes such as sunny days, cloudy days, daytime and night are influenced by light conditions, and in different natural environments, better imaging effect can be ensured by adopting different shooting modes.
In the method for quickly adjusting the white balance of the camera, the white balance parameters are displayed on a display screen of the mobile terminal; then determining a current shooting mode according to the white balance parameters; the user can obtain feedback information of white balance adjustment, and user experience is improved.
Furthermore, an embodiment of the present invention further provides a computer-readable storage medium, where a camera white balance fast adjustment program is stored on the computer-readable storage medium, and when executed by a processor, the camera white balance fast adjustment program implements the following operations:
the method comprises the steps that color temperature information of the current environment of the mobile terminal is obtained in real time through a color temperature sensor, and corresponding white balance parameters are obtained according to the color temperature information;
loading the white balance parameters when a camera function of the mobile terminal is started;
adjusting an imaging effect of the camera based on the white balance parameter.
Further, the fast camera white balance adjustment program when executed by the processor further performs the following operations:
and calibrating and storing the white balance parameters corresponding to the color temperature values so that the mobile terminal can obtain the corresponding white balance parameters according to the color temperature information.
Further, the fast camera white balance adjustment program when executed by the processor further performs the following operations:
acquiring current R/G information and B/G information of the mobile terminal in real time through a color temperature sensor;
acquiring corresponding color temperature information based on the R/G information and the B/G information;
and acquiring corresponding white balance parameters based on the color temperature information.
Further, the fast camera white balance adjustment program when executed by the processor further performs the following operations:
capturing a picture with a preset frame number through a color temperature sensor in the current environment;
and counting R/G information and B/G information corresponding to the pictures based on the captured pictures with the preset frame number.
Further, the fast camera white balance adjustment program when executed by the processor further performs the following operations:
when an instruction for starting a camera function is acquired, starting a camera according to the instruction;
and when the camera is started, loading the white balance parameters to a photo preview interface.
Further, the fast camera white balance adjustment program when executed by the processor further performs the following operations:
completing corresponding white balance setting based on the white balance parameters;
and performing automatic white balance preview adjustment on the current photographing picture based on the white balance setting.
Further, the fast camera white balance adjustment program when executed by the processor further performs the following operations:
and when a photographic picture is acquired, applying the white balance parameters to the photographic picture.
Further, the fast camera white balance adjustment program when executed by the processor further performs the following operations:
displaying the white balance parameter on a display screen of the mobile terminal;
and determining the current shooting mode according to the white balance parameters.
Acquiring color temperature information of the current environment of the terminal in real time through a color temperature sensor;
when a camera function of the terminal is started, the color temperature information is obtained;
and finishing automatic white balance adjustment of the camera based on the color temperature information.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
- A method for quickly adjusting white balance of a camera is characterized by comprising the following steps:the method comprises the steps that color temperature information of the current environment of the mobile terminal is obtained in real time through a color temperature sensor, and corresponding white balance parameters are obtained according to the color temperature information;loading the white balance parameters when a camera function of the mobile terminal is started;adjusting an imaging effect of the camera based on the white balance parameter.
- The method for fast adjusting white balance of camera according to claim 1, wherein the step of acquiring color temperature information of current environment of the mobile terminal in real time by the color temperature sensor is preceded by the method further comprising:and calibrating and storing the white balance parameters corresponding to the color temperature values so that the mobile terminal can obtain the corresponding white balance parameters according to the color temperature information.
- The method for fast adjusting white balance of camera according to claim 1, wherein the step of obtaining color temperature information of current environment of the mobile terminal in real time through a color temperature sensor, and the step of obtaining corresponding white balance parameters according to the color temperature information comprises:acquiring current R/G information and B/G information of the mobile terminal in real time through a color temperature sensor;acquiring corresponding color temperature information based on the R/G information and the B/G information;and acquiring corresponding white balance parameters based on the color temperature information.
- The method for fast adjusting white balance of camera according to claim 3, wherein the step of acquiring current R/G information and B/G information of the mobile terminal in real time through the color temperature sensor comprises:capturing a picture with a preset frame number through a color temperature sensor in the current environment;and counting R/G information and B/G information corresponding to the pictures based on the captured pictures with the preset frame number.
- The method for fast adjusting white balance of camera according to claim 1, wherein the step of loading the white balance parameters when the camera function of the mobile terminal is started comprises:when an instruction for starting a camera function is acquired, starting a camera according to the instruction;and when the camera is started, loading the white balance parameters to a photo preview interface.
- The method for rapidly adjusting the white balance of a camera according to claim 1, wherein the adjusting the imaging effect of the camera based on the white balance parameter comprises:completing corresponding white balance setting based on the white balance parameters;and performing automatic white balance preview adjustment on the current photographing picture based on the white balance setting.
- The method for rapidly adjusting the white balance of a camera according to any one of claims 1 to 6, wherein after the step of adjusting the imaging effect of the camera based on the white balance parameter, the method further comprises:and when a photographic picture is acquired, applying the white balance parameters to the photographic picture.
- The method for rapidly adjusting the white balance of a camera according to any one of claims 1 to 7, wherein after the step of adjusting the imaging effect of the camera based on the white balance parameter, the method further comprises:displaying the white balance parameter on a display screen of the terminal;and determining the current shooting mode according to the white balance parameters.
- A camera white balance rapid adjustment device is characterized by comprising a color temperature sensor arranged around a lens; the device for rapidly adjusting the white balance of the camera further comprises: a memory, a processor and a camera white balance quick adjustment program stored on the memory and executable on the processor, the camera white balance quick adjustment program when executed by the processor implementing the steps of the camera white balance quick adjustment method according to any one of claims 1 to 8.
- A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a camera white balance quick adjustment program, which when executed by a processor, implements the steps of the camera white balance quick adjustment method according to any one of claims 1 to 8.
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| PCT/CN2017/105165 WO2019061545A1 (en) | 2017-09-30 | 2017-09-30 | Method and device for rapidly adjusting white balance of camera and computer-readable storage medium |
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| CN111492653B CN111492653B (en) | 2023-06-16 |
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| WO2019061545A1 (en) | 2019-04-04 |
| CN111492653B (en) | 2023-06-16 |
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