CN111918047A - Photographing control method and device, storage medium and electronic equipment - Google Patents
Photographing control method and device, storage medium and electronic equipment Download PDFInfo
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- CN111918047A CN111918047A CN202010733204.1A CN202010733204A CN111918047A CN 111918047 A CN111918047 A CN 111918047A CN 202010733204 A CN202010733204 A CN 202010733204A CN 111918047 A CN111918047 A CN 111918047A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- 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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Abstract
The disclosure provides a photographing control method, a photographing control device, a storage medium and an electronic device, and relates to the technical field of image processing. The photographing control method comprises the following steps: acquiring a channel value of a light source received by the terminal in the current environment through a color temperature sensor in the terminal; the terminal comprises a display surface and a non-display surface, and the color temperature sensor is arranged on the non-display surface; performing light splitting processing on the channel value to obtain a target environment light color temperature corresponding to the current environment; and reporting the target ambient light color temperature to the terminal, responding to a photographing instruction of a target camera, and performing photographing operation on the object to be photographed according to the photographing parameters corresponding to the target ambient light color temperature to obtain a photographing image corresponding to the object to be photographed. The embodiment of the disclosure can improve the quality of the photographed image.
Description
Technical Field
The present disclosure relates to the field of image processing technologies, and in particular, to a photographing control method, a photographing control apparatus, a computer-readable storage medium, and an electronic device.
Background
With the continuous upgrading of the pixel quality of the camera, the requirement of the user for photographing is higher and higher. In order to meet the photographing requirement of a user, the intelligent terminal has the color temperature auxiliary photographing function, namely, the camera can adjust the color effect of the photo according to the cold and hot color temperatures of the current environment during photographing, and the photographing effect is improved.
The color temperature auxiliary photographing method in the related art adjusts the screen display effect through the prepositive color temperature. For example, a color temperature sensor is added in the bang area. Specifically, as shown in fig. 1, it is necessary to place a color temperature sensor under ink in the bang area of the terminal 100.
In the above manner, the color temperature sensor is designed to be placed in the bang area, large ink holes are required to be formed, and the proportion of the mobile phone screen is large; also, the resulting color temperature may be inaccurate, making the accuracy of the photographed image poor.
Disclosure of Invention
The present disclosure provides a photographing control method, a photographing control apparatus, a computer-readable storage medium, and an electronic device, thereby overcoming, at least to some extent, the problem of poor quality of photographed images.
According to an aspect of the present disclosure, there is provided a photographing control method including: acquiring a channel value of a light source received by the terminal in the current environment through a color temperature sensor in the terminal; the terminal comprises a display surface and a non-display surface, and the color temperature sensor is arranged on the non-display surface; performing light splitting processing on the channel value to obtain a target environment light color temperature corresponding to the current environment; and reporting the target ambient light color temperature to the terminal, responding to a photographing instruction of a target camera, and performing photographing operation on the object to be photographed according to the photographing parameters corresponding to the target ambient light color temperature to obtain a photographing image corresponding to the object to be photographed.
According to an aspect of the present disclosure, there is provided a photographing control apparatus including: the information acquisition module is used for acquiring a channel value of a light source received by the terminal in the current environment through a color temperature sensor in the terminal; the terminal comprises a display surface and a non-display surface, and the color temperature sensor is arranged on the non-display surface; the color temperature determining module is used for carrying out light splitting processing on the channel value to obtain a target environment light color temperature corresponding to the current environment; and the auxiliary photographing module is used for reporting the target environment light color temperature to the terminal, responding to a photographing instruction of a target camera, and performing photographing operation on the object to be photographed according to the photographing parameters corresponding to the target environment light color temperature so as to obtain a photographing image corresponding to the object to be photographed.
According to an aspect of the present disclosure, there is provided a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements a photographing control method as recited in any of the above.
According to an aspect of the present disclosure, there is provided an electronic device including: a processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to execute any one of the above-described photographing control methods via execution of the executable instructions.
In the technical solutions provided in some embodiments of the present disclosure, on one hand, since the target ambient light color temperature of the environment where the terminal is located can be collected by the color temperature sensor located on the non-display surface of the terminal, and the color temperature sensor does not need to be arranged in the bang area, the operation of opening a large ink hole is avoided, the screen occupation ratio of the terminal is reduced, and the terminal structure is simplified. On the other hand, the real target environment light color temperature is obtained by performing light splitting processing on the channel value of the light source received by the terminal in the current environment, and the accuracy and the authenticity of color temperature determination are improved. And then the target camera is subjected to auxiliary photographing according to the color temperature of the target environment light, the photographing quality can be improved from the dimension of the photographing process, the photographing accuracy and the photographing effect are improved through the white balance adjusting process, and the photographing image quality is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty. In the drawings:
FIG. 1 is a schematic view showing an interface of a color temperature sensor in the related art;
fig. 2 is a schematic diagram illustrating an exemplary system architecture to which a photographing control method or a photographing control apparatus according to an embodiment of the present disclosure may be applied;
FIG. 3 illustrates a schematic structural diagram of an electronic device suitable for use in implementing embodiments of the present disclosure;
fig. 4 schematically shows a flowchart of a photographing control method according to an exemplary embodiment of the present disclosure;
FIG. 5 shows a schematic structural diagram of a color temperature sensor in an embodiment of the disclosure;
FIG. 6 is a schematic flow chart illustrating the determination of the color temperature of the target ambient light according to the embodiment of the present disclosure;
FIG. 7 is a schematic flow chart illustrating the color temperature processing according to the embodiment of the disclosure;
FIG. 8 is a schematic diagram illustrating an interface for taking a picture with a front camera in an embodiment of the disclosure;
fig. 9 schematically shows a block diagram of a photographing control apparatus in an exemplary embodiment of the present disclosure.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and the like. In other instances, well-known technical solutions have not been shown or described in detail to avoid obscuring aspects of the present disclosure.
Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.
The flow charts shown in the drawings are merely illustrative and do not necessarily include all of the steps. For example, some steps may be decomposed, and some steps may be combined or partially combined, so that the actual execution sequence may be changed according to the actual situation. In addition, all of the following terms "first" and "second" are used for distinguishing purposes only and should not be construed as limiting the present disclosure.
In order to solve the technical problems in the related art, the embodiment of the present disclosure provides a photographing control method. Fig. 2 is a schematic diagram illustrating an application scenario to which the photographing control method or the photographing control apparatus according to the embodiment of the present disclosure may be applied.
As shown in fig. 2, the photographing control method may be applied to an image capturing process, and as shown in fig. 2, may be particularly applied to a process of photographing an object 201 to be photographed by using a terminal 200. The terminal 200 may be various types of clients capable of being used for shooting, for example, various smartphones, tablet computers, desktop computers, vehicle-mounted devices, wearable devices, and the like, which are capable of capturing images or videos and displaying the images or videos. The object 201 to be photographed may be any type of object to be photographed in various scenes, such as a person, an animal, or a landscape, etc. The object to be photographed may be in a stationary state or in a moving state. Specifically, the camera or the shooting application on the terminal 200 may be used to capture an image of the object to be shot. The camera on the terminal can include a plurality of camera modules, also can include leading camera and rear camera.
In the embodiment of the disclosure, the terminal can determine the object to be shot in response to the trigger operation of the user, further perform shooting in response to the shutter trigger operation, and acquire the target ambient light color temperature of the current environment where the terminal is located in the shooting process, so as to determine the corresponding shooting parameter according to the target ambient light color temperature, and shoot the object to be shot by using the shooting parameter from a person, so as to obtain the shot image corresponding to the image to be shot.
It should be noted that the photographing control method provided by the embodiment of the present disclosure may be completely executed by the terminal, and is not particularly limited herein. Accordingly, the photographing control device may be provided in the terminal.
FIG. 3 shows a schematic diagram of an electronic device suitable for use in implementing exemplary embodiments of the present disclosure. It should be noted that the electronic device shown in fig. 3 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present disclosure.
The electronic device of the present disclosure includes at least a processor and a memory for storing one or more programs, which when executed by the processor, cause the processor to implement the photographing control method of the exemplary embodiments of the present disclosure.
Specifically, as shown in fig. 3, the electronic device 300 may include: processor 310, internal memory 321, external memory interface 322, Universal Serial Bus (USB) interface 330, charge management Module 340, power management Module 341, battery 342, antenna 1, antenna 2, mobile communication Module 350, wireless communication Module 360, sensor Module 380, display screen 390, indicator 392, motor 393, keys 394, and Subscriber Identity Module (SIM) card interface 395. The sensor module 380 may include a depth sensor, a pressure sensor, a gyroscope sensor, an air pressure sensor, a magnetic sensor, an acceleration sensor, a distance sensor, a proximity light sensor, a fingerprint sensor, a temperature sensor, a touch sensor, an ambient light sensor, a bone conduction sensor, and the like.
It is to be understood that the illustrated structure of the embodiment of the present application does not specifically limit the electronic device 300. In other embodiments of the present application, electronic device 300 may include more or fewer components than shown, or some components may be combined, some components may be split, or a different arrangement of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.
Processor 310 may include one or more processing units, such as: the Processor 310 may include an Application Processor (AP), a modem Processor, a Graphics Processing Unit (GPU), an Image Signal Processor (ISP), a controller, a video codec, a Digital Signal Processor (DSP), a baseband Processor, and/or a Neural Network Processor (NPU), and the like. The different processing units may be separate devices or may be integrated into one or more processors. Additionally, a memory may be provided in processor 310 for storing instructions and data.
The USB interface 330 is an interface conforming to the USB standard specification, and may specifically be a MiniUSB interface, a microsusb interface, a USB type c interface, or the like. The USB interface 330 may be used to connect a charger to charge the electronic device 300, and may also be used to transmit data between the electronic device 300 and peripheral devices. And the earphone can also be used for connecting an earphone and playing audio through the earphone. The interface may also be used to connect other electronic devices, such as AR devices and the like.
The charging management module 340 is configured to receive charging input from a charger. The charger may be a wireless charger or a wired charger. The power management module 341 is configured to connect the battery 342, the charging management module 340 and the processor 310. The power management module 341 receives the input from the battery 342 and/or the charging management module 340, and provides power to the processor 310, the internal memory 321, the display screen 390, the wireless communication module 360, and the like.
The wireless communication function of the electronic device 300 may be implemented by the antenna 1, the antenna 2, the mobile communication module 350, the wireless communication module 360, a modem processor, a baseband processor, and the like.
The mobile communication module 350 may provide a solution including 2G/3G/4G/5G wireless communication applied to the electronic device 300.
The Wireless Communication module 360 may provide solutions for Wireless Communication applied to the electronic device 300, including Wireless Local Area Networks (WLANs) (e.g., Wireless Fidelity (Wi-Fi) network), Bluetooth (BT), Global Navigation Satellite System (GNSS), Frequency Modulation (FM), Near Field Communication (NFC), Infrared (IR), and the like.
The electronic device 300 implements a display function through the GPU, the display screen 390, and the application processor. The GPU is a microprocessor for photo control, connected to the display screen 390 and an application processor. The GPU is used to perform mathematical and geometric calculations for graphics rendering. The processor 310 may include one or more GPUs that execute program instructions to generate or alter display information.
The internal memory 321 may be used to store computer-executable program code, which includes instructions. The internal memory 321 may include a program storage area and a data storage area. The external memory interface 322 may be used to connect an external memory card, such as a Micro SD card, to extend the memory capability of the electronic device 300.
Keys 394 include a power on key, a volume key, and the like. The keys 394 may be mechanical keys. Or may be touch keys. Motor 393 may generate a vibration cue. Motor 393 can be used for both an incoming call vibration prompt and for touch vibration feedback. Indicator 392 may be an indicator light that may be used to indicate a state of charge, a change in charge, or a message, missed call, notification, etc. The SIM card interface 395 is for connecting a SIM card. The electronic device 300 interacts with the network through the SIM card to implement functions such as communication and data communication.
The present application also provides a computer-readable storage medium, which may be contained in the electronic device described in the above embodiments; or may exist separately without being assembled into the electronic device.
A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples of the computer readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the present disclosure, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A computer readable storage medium may transmit, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable storage medium may be transmitted using any appropriate medium, including but not limited to: wireless, wire, fiber optic cable, RF, etc., or any suitable combination of the foregoing.
The computer-readable storage medium carries one or more programs which, when executed by an electronic device, cause the electronic device to implement the method as described in the embodiments below.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams or flowchart illustration, and combinations of blocks in the block diagrams or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The units described in the embodiments of the present disclosure may be implemented by software, or may be implemented by hardware, and the described units may also be disposed in a processor. Wherein the names of the elements do not in some way constitute a limitation on the elements themselves.
Fig. 4 schematically shows a flowchart of a photographing control method according to an exemplary embodiment of the present disclosure, which may be applied to a capturing end in an image processing process, for example, in an image capturing process of capturing an image, capturing a video, and the like by using a camera of a terminal. Referring to fig. 4, the photographing control method may include steps S410 to S430, with the terminal as the execution subject, described in detail as follows:
in step S410, a channel value of a light source received by the terminal in a current environment is obtained through a color temperature sensor in the terminal; the terminal comprises a display surface and a non-display surface, and the color temperature sensor is arranged on the non-display surface.
In the embodiment of the present disclosure, the color temperature sensor refers to a color sensor for calculating the color temperature of the ambient light by acquiring color information of different wavelengths. The color temperature sensor includes an XYZ sensor and an RGB sensor. In the embodiment of the present disclosure, the color temperature sensor is exemplified as an RGB sensor.
The display surface refers to a screen of the terminal, and particularly refers to a side capable of receiving user operations and displaying pictures, and the non-display surface refers to a back surface of the screen of the terminal. The number of the color temperature sensors included in the terminal may be determined according to the magnitude of the illuminance of the color temperature. Illuminance is the unit of proportionality coefficient between luminous flux and illuminated area. Specifically, when the illuminance is low, two color temperature sensors, that is, a front-rear two-color temperature device may be provided because of a problem of sensitivity. When the illuminance is high, there is no problem of sensitivity or the like, and therefore the number of color temperature sensors may be one. When the color temperature sensor is one, the color temperature sensor may be located on a non-display surface, i.e., on a side away from the display surface or on an inner side of the screen of the terminal, particularly below the screen of the terminal, and at a position closer to a top area of the screen (e.g., at an edge or a periphery of the top area). Referring to fig. 5, the center of the color temperature sensor 501 is aligned with the center of the opening of the auxiliary material of the display surface of the terminal 500 to achieve the function of receiving the light source accurately, completely and comprehensively. The area proportion of the photodiodes of each color channel of the three primary colors corresponding to the opening of the auxiliary material of the display surface is consistent, namely, the area proportion of the photodiodes of each channel of the R/G/B exposed in the opening of the auxiliary material of the display surface is the same, so that the received value under the same light source environment is almost the same, the abnormal problem caused by the fact that the round hole is shielded is avoided, and the accuracy of calculation is improved. And, the light sense colour temperature sensor IC is raised through bed hedgehopping board to make its gap airgap that keeps close enough (for example less than the preset value) to the display screen apron, thereby guarantee device sensitivity.
When the color temperature sensor is placed below the screen, only a round hole needs to be formed in the display surface auxiliary material corresponding to the screen, so that the air gap is small enough, the structure is simple, and the realization is easy. And, set up the colour temperature sensor in the non-display surface, can not occupy the screen of terminal and account for, promoted the whole expressive force at terminal to because there is not the problem of light leak at leading camera shooting in-process, consequently avoided the influence of screen light leak to the colour temperature accuracy.
After the color temperature sensor is placed, the channel value of the light source received by the terminal in the current environment can be collected through the set color temperature sensor. The environment in which the terminal is located, that is, the environment corresponding to the location of the terminal, may be indoor or outdoor, and the like. The channel value refers to an original channel value corresponding to each channel. The channels herein may include, but are not limited to, RGBC, etc., where R is the red channel, G is the green channel, B is the blue channel, and C is the full spectrum channel. In addition to this, an IR channel or the like may be included. Specifically, the camera of the terminal receives a light source (ambient light) of an environment where the terminal is located, and converts the light source into R, B, G, C digital signals of multiple channels through digital-to-analog conversion. Since the values of the three channels R, B, G, C obtained at different color temperatures may be different, it is possible to determine the target ambient light color temperature of the current environment by determining at which color temperature the current environment is located based on the channel values.
Specifically, the light source received in the current environment may be integrated by the color temperature sensor, and the channel value of the received light source may be obtained after digital-to-analog conversion. Namely, RGBC original channel values are obtained.
In step S420, the channel value is subjected to a light splitting process to obtain a target ambient light color temperature corresponding to the current environment.
In the embodiments of the present disclosure, the light-splitting process refers to an operation of dividing the light sources into different categories. In the embodiment of the disclosure, the color temperature accuracy of the light source can be improved through light splitting operation. The light source is an infrared light source, and may specifically include, but is not limited to, a light (a light source conforming to a color temperature of 2856K), D65 (artificial sunlight is most commonly used in standard light sources, and when the color effect of an article is observed indoors and in rainy days, there is an illumination effect approximately observed under sunlight), sunlight, and the like. In the embodiment of the disclosure, the light source can be divided into different types through light splitting operation, so that different operations are respectively performed on different types, and thus the corresponding target ambient light color temperature is obtained.
The target ambient light color temperature refers to the color temperature of the ambient environment of the terminal, and when the camera of the terminal is detected to be turned on, the target ambient light color temperature of the current environment can be acquired through the color temperature sensor arranged on the inner side of the screen of the terminal. The target color temperature of the ambient light of the terminal refers to the color temperature of the ambient light where the terminal is currently located. The color temperature is a unit of measure indicating that a light ray contains a color component. When heated to a certain temperature, the light emitted by a black body contains spectral components, which are referred to as the color temperature at that temperature. If the light emitted by a certain light source has the same spectral components as the light emitted by a black body at a certain temperature, the light is called a certain K color temperature. The color temperature sensor may be an RGB color temperature sensor. The luminance value combination of RGB and color temperature have one-to-one correspondence relation. By sensing the RGB luminance values in the environment, the color temperature can be obtained.
In the embodiment of the present disclosure, after the channel value of the light source of the current environment is obtained, the channel value may be subjected to a light splitting process, so as to obtain a target environment light color temperature corresponding to the current environment. The target ambient light color temperature may correspond to the channel value and may be obtained by processing the channel value.
Specifically, the performing the spectral processing on the channel value to obtain the target ambient light color temperature corresponding to the current environment may include: and performing light splitting operation on the channel values to obtain the ratio of each channel, and determining the color temperature of the target ambient light according to the ratio of each channel. The ratio of each channel can be determined according to the ratio of the components of the channel value, and can be specifically expressed by an IR ratio. Since color temperature and color are correlated, if the component of a certain channel value is larger, the channel value is larger under the same integration condition. For example, if the red component of the environment is larger, the R channel value is larger. After the RGBC channel values are obtained, the occupation ratio of each channel can be judged based on the channel values, so that the target ambient light color temperature is determined according to logical operation between the occupation ratios of each channel.
When determining the color temperature of the target ambient light, the type of the current environment may be determined according to the ratio of each channel, and the color temperature of the target ambient light may be determined based on the type of the current environment. The type of the current environment refers to the type of the light source of the current environment, and may be cold light or warm light in particular. Wherein, cold light refers to a light source with a low infrared component, and warm light refers to a light source with a high infrared component. Through the ratio of each channel, the current environment of the terminal can be determined under which light source. After the type of the current environment is determined, a proper mode can be selected according to the type of the current environment, and the light color temperature of the target environment corresponding to the type of the current environment is determined. In this way, the accuracy and reliability of determining the color temperature of the target ambient light can be improved.
Fig. 6 schematically shows a flowchart for determining the color temperature of the target ambient light, and with reference to fig. 6, the method mainly includes the following steps:
in step S601, it is determined whether the type of the current environment is a first type; if yes, go to step S602; if not, go to step S603.
In this step, the type of the current environment may be determined by the ratio of each channel value. The first type may be used to represent a source of luminescence, i.e. low infrared components. The second type may be used to represent warm light, i.e. a high infrared component light source.
In step S602, a first type of relative color temperature is determined according to a first weight parameter and a first constant parameter to determine the relative color temperature as the target ambient light color temperature.
In this step, CCT (Correlated Color Temperature) is used to describe the Color of light emitted by the light source. Since the color of most illumination sources is not exactly on the black body radiation line, the relative color temperature of the light source is represented by the shortest distance temperature on the uniform chromaticity diagram. The color temperature is high, the color is cold, and the color temperature is low, and the color is warm.
The first weight parameter K1 may be used to represent the weight of the channel value ratio, and both the first weight parameter and the first constant parameter B1 may be determined by way of a linear fit. In particular, multiple acquisitions may be fitted using multiple acquisition results to determine a best estimate of the first constant parameter B1, in particular by a ratio of the B channel value and the R channel value, and to determine a best estimate of the first weight parameter K1. In the first type, the relative color temperature may be calculated as shown in formula (1), where B is the value of the blue channel and R is the value of the red channel.
CCT is K1B/R + B1 formula (1)
In step S603, a second type of relative color temperature is determined according to a second weight parameter and a second constant parameter to determine the relative color temperature as the target ambient light color temperature.
In this step, the second weight parameter K2 may be used to represent the weight of the channel value ratio, and both the second weight parameter and the second constant parameter B2 may be determined by linear fitting. In particular, multiple acquisitions may be fitted using multiple acquisition results to determine the best estimate of the second constant parameter B2, in particular by the ratio of the B channel value and the R channel value, and to determine the best estimate of the second weight parameter K2. In the second type, the manner of calculating the relative color temperature may be as shown in equation (2):
CCT is K2B/R + B2 formula (2)
Through the technical scheme in fig. 6, the relative color temperature can be calculated by respectively selecting the modes corresponding to the types according to the different types of the current environment, and then the relative color temperature is determined as the target ambient light color temperature. The pertinence and the accuracy of determining the color temperature of the target ambient light can be improved.
Besides, the manner of detecting the target ambient light color temperature of the current environment of the terminal may further include: acquiring an image of an object to be shot under the brightness required by shooting, and analyzing pixels in a preset area of the image to determine the color temperature level of each pixel in the preset area; and counting the number of pixels corresponding to each color temperature level, and determining the color temperature level with the largest number as the target ambient light color temperature of the terminal. For example, if 100 pixels correspond to a color temperature level of 3, 50 pixels correspond to a color temperature level of 2, and 300 pixels correspond to a color temperature level of 1, then the color temperature level 1 may be determined as the target ambient light color temperature of the current environment of the terminal.
An overall flow chart of the color temperature processing is schematically shown in fig. 7, and referring to fig. 7, mainly includes the following steps:
in step S701, the color temperature sensor starts integration.
In step S702, digital-to-analog conversion is performed on the result obtained by the integration to obtain an RGBC original channel value.
In step S703, the original channel values of the respective channels are subjected to a spectral operation, and the ratio of the respective channel values is determined.
In step S704, when the occupancy of the IR channel is low, the IR component light source is used.
In step S705, when the IR channel has a high occupancy ratio, the IR channel is a high infrared component light source.
In step S706, it is determined that the relative color temperature is low, i.e., CCT _ IR is low.
In step S707, it is determined that the relative color temperature is high, i.e., CCT _ IR is high.
In step S708, the relative color temperature is reported to the terminal.
Through the technical scheme in fig. 7, the target ambient light color temperature is finally reported to the operating system of the terminal through data acquisition for other applications to call. The color temperature of the target ambient light is calculated by linear fitting, wherein K1, B1, K2 and B2 are four coefficients of the linear fitting, and the four coefficients need to be calibrated in the production process so as to improve the accuracy.
It should be added that when the illuminance of the color temperature is low (for example, less than a preset value), two color temperature sensors, namely, a front color temperature sensor and a rear color temperature sensor, may be provided due to the problem of sensitivity. The front color temperature sensor can be located on a non-display surface of the terminal, specifically located below a screen of the terminal and close to a top area of the display surface. The center of the front color temperature sensor is aligned with the circle center of the opening of the display surface auxiliary material of the terminal, and the area proportion of the photodiodes of each color channel of the three primary colors corresponding to the opening of the display surface auxiliary material is consistent. The rear color temperature sensor can be arranged on one side of the flash lamp and used for detecting the color temperature of the environment when a picture is taken, so that the color of the shot picture is more accurate.
When a front color temperature sensor and a rear color temperature sensor exist, the target ambient light color temperature can be obtained by weighting the ambient light color temperatures of the front color temperature sensor and the rear color temperature sensor. The pose information of the terminal can be considered, so that the weight of the front color temperature sensor and the weight of the rear color temperature sensor are determined by combining the pose information, and then weighted summation is carried out according to the weights to obtain the color temperature of the target ambient light. For the weight, the higher the sensitivity, the larger the weight. For example, when the terminal is turned upside down, the sensitivity of the rear color temperature sensor around the rear camera is large, and thus the weight of the rear color temperature sensor is large. The process of determining the color temperature of the front color temperature sensor and the rear color temperature sensor is the same as the process described above, and is not repeated here.
Continuing to refer to fig. 4, in step S430, reporting the target ambient light color temperature to the terminal, and performing a photographing operation on the object to be photographed according to the photographing parameters corresponding to the target ambient light color temperature in response to the photographing instruction for the target camera, so as to obtain a photographed image corresponding to the object to be photographed.
In the embodiment of the present disclosure, after the target ambient light color temperature of the current environment is obtained, the target ambient light color temperature may be reported to an operating system in the terminal for storage. The operating system may be, for example, an android system or the like. Further, whether a photographing instruction for a target camera is received or not can be detected, wherein the target camera refers to a front camera of the terminal. The photographing instruction can be started in response to any one or more of the triggering of a photographing control or a photographing key in the terminal by a user, voice triggering, expression triggering, gesture triggering and the like. If a photographing instruction for the front camera is detected, the stored target environment light color temperature of the current environment can be called from the operating system of the terminal to perform photographing operation on the object to be photographed, so that a photographing image corresponding to the object to be photographed is obtained.
Specifically, the target ambient light color temperature may be called to adjust the photographing parameters to improve the photographing quality. The photographing parameter may be white balance. White balance is the realization that the camera image can accurately reflect the color condition of the shot object. The color cast phenomenon occurring when shooting under a specific light source is compensated by strengthening the corresponding complementary color. The white balance setting can calibrate the deviation of the color temperature, and specifically can include adjusting the camera at any time according to the color temperature change of the picture by a camera adjusting function or an automatic tracking function depending on the camera under the coordination of the color temperature so as to obtain a white balance parameter corresponding to the light color temperature of the target environment, and adjusting the white balance according to the white balance parameter. The white balance parameters matched with the color temperature in the target environment light are obtained, so that the color cast is corrected by adjusting the white balance parameters, and the image which is easy to color cast in the photographing process is adjusted, so that the adjusted image with good color temperature is obtained. Thereby improving the photographing effect of the front camera.
It should be added that, referring to the photographing interface diagram shown in fig. 8, when the front camera of the terminal 800 is turned on to photograph the object to be photographed 802, since the preset region 801 above the camera, which affects the color temperature, displays the preset color, and the preset color is unrelated to the color temperature, the accuracy of the color temperature of the target ambient light is not affected when the front camera is turned on. Wherein the preset color may be black. Therefore, in the shooting scene of the front camera, the color temperature sensor arranged on the non-display surface below the screen can accurately calculate the light color temperature of the target environment of the current environment where the terminal is located, the problem of inaccurate color temperature caused by different colors displayed on the screen can be avoided, the accuracy and the reliability are improved, and the shooting effect and the shooting quality can be improved.
Further, if the terminal includes a dual screen, the setting position may be the same as the above-described setting position. For example, a color temperature sensor is provided on each non-display surface or only one of the non-display surfaces. The photographing method is the same as the above steps, and is not limited herein.
In summary, in the embodiment of the present disclosure, the color temperature sensor is added below the screen of the terminal, so that the problem that the color temperature function of the full-screen terminal cannot be used is solved, the structure is simplified, the occupation ratio of the whole screen is not affected, and the overall appearance expressive force is good. By introducing the color temperature sensor, the problem of low accuracy of slit color temperature is avoided, preposition photographing can be assisted, real color restoration of photographed images can be improved, and photographing effect and photographing quality are improved.
It should be noted that although the various steps of the methods of the present disclosure are depicted in the drawings in a particular order, this does not require or imply that these steps must be performed in this particular order, or that all of the depicted steps must be performed, to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step execution, and/or one step broken down into multiple step executions, etc.
Fig. 9 schematically shows a block diagram of the photographing control apparatus of an exemplary embodiment of the present disclosure. Referring to fig. 9, a photographing control apparatus 900 according to an exemplary embodiment of the present disclosure may include the following modules:
the information acquisition module 901 may be configured to acquire, through a color temperature sensor in the terminal, a channel value of a light source received by the terminal in a current environment; the terminal comprises a display surface and a non-display surface, and the color temperature sensor is arranged on the non-display surface;
a color temperature determining module 902, configured to perform a light splitting process on the channel value to obtain a target environment light color temperature corresponding to the current environment;
the auxiliary photographing module 903 may be configured to report the target ambient light color temperature to the terminal, respond to a photographing instruction for a target camera, and perform a photographing operation on a subject to be photographed according to a photographing parameter corresponding to the target ambient light color temperature, so as to obtain a photographed image corresponding to the subject to be photographed.
In an exemplary embodiment of the disclosure, the center of the color temperature sensor is aligned with a center of a hole of a display surface auxiliary material of the terminal, and area ratios of photodiodes of each color channel corresponding to the hole of the display surface auxiliary material are consistent.
In an exemplary embodiment of the present disclosure, the color temperature determination module includes: and the channel value processing module is used for performing light splitting operation on the channel values to obtain the ratio of each channel and determining the color temperature of the target ambient light according to the ratio of each channel.
In an exemplary embodiment of the present disclosure, the channel value processing module includes: and the type determining module is used for determining the type of the current environment according to the ratio of each channel and determining the target ambient light color temperature based on the type of the current environment.
In an exemplary embodiment of the present disclosure, the type determining module includes: the first determining module is used for determining the relative color temperature of the first type according to a first weight parameter and a first constant parameter if the type of the current environment is the first type, so as to determine the relative color temperature as the target ambient light color temperature; and the second determining module is used for determining the relative color temperature of the second type according to a second weight parameter and a second constant parameter if the infrared ratio is of the second type, so as to determine the relative color temperature as the target ambient light color temperature.
In an exemplary embodiment of the present disclosure, the apparatus further includes: and the dual color temperature determination module is used for determining the target environment light color temperature of the current environment through two color temperature sensors when the illumination of the color temperature of the current environment is smaller than a preset value, and the two color temperature sensors comprise a front color temperature sensor and a rear color temperature sensor.
In an exemplary embodiment of the present disclosure, the two-color temperature determination module is configured to: and weighting the ambient light color temperatures of the front color temperature sensor and the rear color temperature sensor to obtain the target ambient light color temperature.
It should be noted that, since each functional module of the photographing control apparatus according to the embodiment of the present disclosure is the same as that in the embodiment of the photographing control method, it is not described herein again.
Through the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein may be implemented by software, or by software in combination with necessary hardware. Therefore, the technical solution according to the embodiments of the present disclosure may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (which may be a CD-ROM, a usb disk, a removable hard disk, etc.) or on a network, and includes several instructions to enable a computing device (which may be a personal computer, a server, a terminal device, or a network device, etc.) to execute the method according to the embodiments of the present disclosure.
Furthermore, the above-described figures are merely schematic illustrations of processes included in methods according to exemplary embodiments of the present disclosure, and are not intended to be limiting. It will be readily understood that the processes shown in the above figures are not intended to indicate or limit the chronological order of the processes. In addition, it is also readily understood that these processes may be performed synchronously or asynchronously, e.g., in multiple modules.
It should be noted that although in the above detailed description several modules or units of the device for action execution are mentioned, such a division is not mandatory. Indeed, the features and functionality of two or more modules or units described above may be embodied in one module or unit, according to embodiments of the present disclosure. Conversely, the features and functions of one module or unit described above may be further divided into embodiments by a plurality of modules or units.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is to be limited only by the terms of the appended claims.
Claims (10)
1. A photographing control method, comprising:
acquiring a channel value of a light source received by the terminal in the current environment through a color temperature sensor in the terminal; the terminal comprises a display surface and a non-display surface, and the color temperature sensor is arranged on the non-display surface;
performing light splitting processing on the channel value to obtain a target environment light color temperature corresponding to the current environment;
and reporting the target ambient light color temperature to the terminal, responding to a photographing instruction of a target camera, and performing photographing operation on the object to be photographed according to the photographing parameters corresponding to the target ambient light color temperature to obtain a photographing image corresponding to the object to be photographed.
2. The photographing control method according to claim 1, wherein a center of the color temperature sensor is aligned with a center of an opening of a display surface auxiliary material of the terminal, and an area ratio of photodiodes of each color channel corresponding to the opening of the display surface auxiliary material is consistent.
3. The photographing control method according to claim 1, wherein the performing the spectral processing on the channel value to obtain a target ambient light color temperature corresponding to the current environment comprises:
and performing light splitting operation on the channel values to obtain the ratio of each channel, and determining the color temperature of the target ambient light according to the ratio of each channel.
4. The photographing control method according to claim 3, wherein the determining the target ambient light color temperature according to the ratio of each channel comprises:
and determining the type of the current environment according to the ratio of each channel, and determining the target ambient light color temperature based on the type of the current environment.
5. The photographing control method according to claim 4, wherein the determining a type of a current environment according to the duty ratio of each of the channels and the determining the target ambient light color temperature based on the type of the current environment comprises:
if the type of the current environment is a first type, determining the relative color temperature of the first type according to a first weight parameter and a first constant parameter so as to determine the relative color temperature as the color temperature of the target ambient light;
and if the infrared ratio is of a second type, determining the relative color temperature of the second type according to a second weight parameter and a second constant parameter so as to determine the relative color temperature as the color temperature of the target ambient light.
6. The photographing control method according to claim 1, wherein the method further comprises:
and when the illumination of the color temperature of the current environment is smaller than a preset value, determining the light color temperature of the target environment of the current environment through two color temperature sensors, wherein the two color temperature sensors comprise a front color temperature sensor and a rear color temperature sensor.
7. The photographing control method according to claim 6, wherein the determining the target ambient light color temperature of the current environment by two color temperature sensors includes:
and weighting the ambient light color temperatures of the front color temperature sensor and the rear color temperature sensor to obtain the target ambient light color temperature.
8. A photographing control apparatus, comprising:
the information acquisition module is used for acquiring a channel value of a light source received by the terminal in the current environment through a color temperature sensor in the terminal; the terminal comprises a display surface and a non-display surface, and the color temperature sensor is arranged on the non-display surface;
the color temperature determining module is used for carrying out light splitting processing on the channel value to obtain a target environment light color temperature corresponding to the current environment;
and the auxiliary photographing module is used for reporting the target environment light color temperature to the terminal, responding to a photographing instruction of a target camera, and performing photographing operation on the object to be photographed according to the photographing parameters corresponding to the target environment light color temperature so as to obtain a photographing image corresponding to the object to be photographed.
9. A computer-readable storage medium on which a computer program is stored, the computer program, when being executed by a processor, implementing the photographing control method according to any one of claims 1 to 7.
10. An electronic device, comprising:
a processor; and
a memory for storing executable instructions of the processor;
wherein the processor is configured to execute the picture taking control method of any one of claims 1-7 via execution of the executable instructions.
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| CN202010733204.1A CN111918047A (en) | 2020-07-27 | 2020-07-27 | Photographing control method and device, storage medium and electronic equipment |
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