CN113422893B - Image acquisition method and device, storage medium and mobile terminal - Google Patents
Image acquisition method and device, storage medium and mobile terminal Download PDFInfo
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- CN113422893B CN113422893B CN202110687921.XA CN202110687921A CN113422893B CN 113422893 B CN113422893 B CN 113422893B CN 202110687921 A CN202110687921 A CN 202110687921A CN 113422893 B CN113422893 B CN 113422893B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/54—Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
- H04M1/0264—Details of the structure or mounting of specific components for a camera module assembly
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
Abstract
The embodiment of the disclosure relates to an image acquisition method, an image acquisition device, a storage medium and a mobile terminal, and relates to the technical field of mobile terminals. The image acquisition method comprises the following steps: when the environment brightness is detected to exceed a preset brightness range, determining a comprehensive brightness level according to the environment brightness and the brightness of the current shot image; and adjusting the configuration parameters of the mobile terminal according to the comprehensive brightness grade so that the mobile terminal acquires images according to the adjusted configuration parameters. The method and the device can reduce the power consumption of the mobile terminal, and clear images can be acquired no matter under the condition that the brightness is too bright or under the condition that the brightness is too dark, so that the quality of the acquired images is improved.
Description
Technical Field
Embodiments of the present disclosure relate to the field of mobile terminal technologies, and in particular, to an image capturing method, an image capturing apparatus, a computer-readable storage medium, and a mobile terminal.
Background
This section is intended to provide a background or context to the embodiments of the disclosure recited in the claims and the description herein is not admitted to be prior art by inclusion in this section.
At present, terminal equipment such as a smart phone and the like becomes a necessity in daily life of people, and the photographing function of the terminal equipment is widely and frequently used by users. In the photographing process, the camera serves as one of the most important key devices on the smart phone, and can collect pictures or images which the user wants to photograph.
Disclosure of Invention
In this context, embodiments of the present disclosure are intended to provide an image capturing method, an image capturing apparatus, a computer-readable storage medium, and a mobile terminal.
According to a first aspect of embodiments of the present disclosure, there is provided an image capturing method, including: when the environment brightness is detected to exceed a preset brightness range, determining a comprehensive brightness level according to the environment brightness and the brightness of the current shot image; and adjusting the configuration parameters of the mobile terminal according to the comprehensive brightness grade so that the mobile terminal acquires images according to the adjusted configuration parameters.
In an optional embodiment, the method further comprises: and when the environment brightness is detected not to exceed the preset brightness range, not collecting the brightness of the current shot image.
In an alternative embodiment, the brightness of the currently captured image is determined by: acquiring the brightness value of each pixel point on the current shot image; and counting the number of pixel points contained in each brightness value, and determining the brightness of the current shot image according to the counting result.
In an alternative embodiment, the determining a comprehensive brightness level according to the ambient brightness and the brightness of the current captured image includes: respectively carrying out weighting operation on the ambient brightness and the brightness of the current shot image and respective preset weights to obtain a target brightness value; and determining the comprehensive brightness level according to the numerical range of the target brightness value.
In an optional embodiment, the configuration parameters of the mobile terminal include exposure parameters of a camera; the exposure parameters of the camera at least comprise one of the following parameters: exposure parameters of the front camera and exposure parameters of the rear camera; the adjusting of the configuration parameters of the mobile terminal according to the comprehensive brightness level comprises: and adjusting the exposure parameters of the camera according to the comprehensive brightness level.
In an optional embodiment, the configuration parameters of the mobile terminal further include screen brightness of the mobile terminal; the adjusting of the configuration parameters of the mobile terminal according to the comprehensive brightness level comprises: and adjusting the screen brightness of the mobile terminal according to the comprehensive brightness level.
In an optional embodiment, the method further comprises: detecting the temperature of the mobile terminal; and adjusting the configuration parameters of the mobile terminal according to the temperature of the mobile terminal.
In an optional implementation manner, the adjusting the configuration parameter of the mobile terminal according to the temperature of the mobile terminal includes: and when the temperature of the mobile terminal is greater than a preset temperature threshold value, setting the exposure parameter of the camera as a preset exposure parameter so as to acquire an image according to the preset exposure parameter.
According to a second aspect of embodiments of the present disclosure, there is provided an image pickup apparatus including: the detection module is used for determining a comprehensive brightness level according to the environment brightness and the brightness of the current shot image when the environment brightness is detected to exceed a preset brightness range; and the configuration parameter adjusting module is used for adjusting the configuration parameters of the mobile terminal according to the comprehensive brightness grade so that the mobile terminal acquires images according to the adjusted configuration parameters.
In an optional embodiment, the detection module is configured to: and when the ambient brightness is detected not to exceed the preset brightness range, not acquiring the brightness of the current shot image.
In an alternative embodiment, the apparatus further comprises: the brightness acquisition module is used for acquiring the brightness value of each pixel point on the current shot image; and counting the number of pixel points contained in each brightness value, and determining the brightness of the current shot image according to the counting result.
In an optional embodiment, the detection module is configured to: respectively carrying out weighting operation on the ambient brightness and the brightness of the current shot image and respective preset weights to obtain a target brightness value; and determining the comprehensive brightness level according to the numerical range of the target brightness value.
In an optional embodiment, the configuration parameters of the mobile terminal include exposure parameters of a camera; the exposure parameters of the camera at least comprise one of the following parameters: exposure parameters of the front camera and exposure parameters of the rear camera; the configuration parameter adjustment module configured to: and adjusting the exposure parameters of the camera according to the comprehensive brightness level.
In an optional embodiment, the configuration parameters of the mobile terminal further include screen brightness of the mobile terminal; the configuration parameter adjustment module configured to: and adjusting the screen brightness of the mobile terminal according to the comprehensive brightness level.
In an alternative embodiment, the apparatus further comprises: the temperature detection module is used for detecting the temperature of the mobile terminal; and adjusting the configuration parameters of the mobile terminal according to the temperature of the mobile terminal.
In an optional embodiment, the temperature detection module is configured to: and when the temperature of the mobile terminal is greater than a preset temperature threshold value, setting the exposure parameter of the camera as a preset exposure parameter so as to acquire an image according to the preset exposure parameter.
According to a third aspect of embodiments 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 the above-described image acquisition method.
According to a fourth aspect of embodiments of the present disclosure, there is provided a mobile terminal including: a processor; and a memory for storing executable instructions of the processor; the camera module is used for collecting images; wherein the processor is configured to perform the above-described image acquisition method via execution of the executable instructions.
According to the image acquisition method, the image acquisition device, the computer readable storage medium and the mobile terminal in the embodiment of the disclosure, on one hand, the comprehensive brightness level is determined by integrating two factors of the environment brightness and the brightness of the current shot image, so that the technical problem of inaccurate processing result caused by directly performing subsequent processing on the image according to the judgment result of the image brightness in the related technology can be solved, and the comprehensiveness and the accuracy of the brightness judgment result are ensured. Furthermore, the brightness of the current shot image is detected only when the detected ambient brightness exceeds the preset brightness range, so that the problem of invalid detection caused by the fact that brightness detection needs to be carried out on each frame of image even under the environment with proper brightness in the related art is solved, and the performance consumption of the mobile terminal is reduced. On the other hand, the configuration parameters of the mobile terminal are adjusted according to the comprehensive brightness level, different configuration parameters can be set for the mobile terminal according to different comprehensive brightness levels, clear images can be collected no matter the brightness is too bright or too dark, and the quality of the collected images is improved.
Drawings
The above and other objects, features and advantages of exemplary embodiments of the present disclosure will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the present disclosure are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which:
fig. 1 shows a flowchart of an image acquisition method in the related art;
FIG. 2 shows a flow diagram of an image acquisition method according to an embodiment of the present disclosure;
FIG. 3 illustrates a flow chart for capturing the brightness of a currently captured image according to an embodiment of the present disclosure;
FIG. 4 illustrates a flow chart for determining an integrated brightness level according to an embodiment of the present disclosure;
FIG. 5 illustrates an overall flow diagram of an image acquisition method according to an embodiment of the present disclosure;
FIG. 6 shows a schematic diagram of an image acquisition device according to an embodiment of the present disclosure;
fig. 7 illustrates a block diagram of a mobile terminal according to an embodiment of the present disclosure.
In the drawings, the same or corresponding reference numerals indicate the same or corresponding parts.
Detailed Description
The principles and spirit of the present disclosure will be described with reference to a number of exemplary embodiments. It is understood that these embodiments are given solely for the purpose of enabling those skilled in the art to better understand and to practice the present disclosure, and are not intended to limit the scope of the present disclosure in any way. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
As will be appreciated by one skilled in the art, embodiments of the present disclosure may be embodied as a system, apparatus, device, method, or computer program product. Accordingly, the present disclosure may be embodied in the form of: entirely hardware, entirely software (including firmware, resident software, micro-code, etc.), or a combination of hardware and software.
According to an embodiment of the present disclosure, an image capturing method, an image capturing apparatus, a computer-readable storage medium, and a mobile terminal are provided.
In this document, any number of elements in the drawings is by way of example and not by way of limitation, and any nomenclature is used solely for differentiation and not by way of limitation.
The principles and spirit of the present disclosure are explained in detail below with reference to several representative embodiments of the present disclosure.
Summary of The Invention
The inventor finds that the existing image acquisition method needs to detect the brightness of each frame of input image no matter in a dark light environment or a bright light environment, so that the power consumption of the mobile terminal is high, and the acquired image definition is poor under the condition of inappropriate light.
In view of the above, the basic idea of the present disclosure is: on one hand, the comprehensive brightness level is determined by integrating two factors of the environment brightness and the brightness of the current shot image, the technical problem that in the related technology, the processing result is inaccurate due to the fact that the image is directly subjected to subsequent processing only according to the judgment result of the image brightness can be solved, and the comprehensiveness and accuracy of the brightness judgment result are guaranteed. Furthermore, the brightness of the current shot image is detected only when the detected ambient brightness exceeds the preset brightness range, so that the problem of invalid detection caused by the fact that brightness detection needs to be carried out on each frame of image even under the environment with proper brightness in the related art is solved, and the performance consumption of the mobile terminal is reduced. On the other hand, the configuration parameters of the mobile terminal are adjusted according to the comprehensive brightness level, different configuration parameters can be set for the mobile terminal according to different comprehensive brightness levels, clear images can be collected no matter under the condition that the brightness is too bright or under the condition that the brightness is too dark, and the quality of the collected images is improved.
Having described the general principles of the present disclosure, various non-limiting embodiments of the present disclosure are described in detail below.
Application scene overview
It should be noted that the following application scenarios are merely illustrated to facilitate understanding of the spirit and principles of the present disclosure, and embodiments of the present disclosure are not limited in this respect. Rather, embodiments of the present disclosure may be applied to any scenario where applicable.
The embodiment of the disclosure supports application scenarios of shooting with a rear camera, for example: when the light sensor detects that the ambient brightness exceeds the preset brightness range, the brightness of the current shot image can be detected, then, a comprehensive brightness grade is calculated according to the ambient brightness and the brightness of the current shot image, and the light sensitivity and/or the exposure time of the rear camera are adjusted according to the comprehensive brightness grade, so that the image quality is improved.
The embodiment of the present disclosure also supports application scenarios of shooting or video chat with a front camera, for example: when the light sensor detects that the ambient brightness exceeds a preset brightness range, the brightness of a current shot image can be detected, a comprehensive brightness level is calculated according to the brightness of the current shot image, the screen brightness of the mobile terminal is adjusted according to the comprehensive brightness level, a light source is provided for a shot object, and the light sensitivity and/or the exposure time of the front camera are adjusted according to the comprehensive brightness level, so that the image quality is improved.
Exemplary method
In the related art, the intensity of light is generally determined only according to the collected image, and related parameters are adjusted to collect the image. Referring to fig. 1, fig. 1 shows a flow of an image acquisition method in the related art, generally, a video frame acquired by a camera is used as an input source and is delivered to a dim light detection module, and if an image obtained by the dim light detection module is dark, the image is delivered to a dim light enhancement module for processing and then outputting the image frame; and if the result obtained by the dark light detection module is that the image is not dark, directly outputting the image frame.
However, the above method has the following drawbacks:
firstly, dark light detection needs to be carried out on each frame of image, and the performance consumption is large;
secondly, after the processing is carried out through the dim light enhancement module, noise is often brought into the image, and in order to achieve a better image dim light enhancement effect, the image needs to be subjected to noise reduction algorithm processing for one time, which brings performance consumption;
thirdly, because each frame of image needs to be subjected to dim light detection, the power consumption is high, and some low-end mobile phone CPUs (Central Processing units) are easily overloaded, so that the mobile phone is scalded.
For this reason, an image capturing method is highly required, which can reduce the performance consumption of the terminal while improving the quality of the captured image.
An exemplary embodiment of the present disclosure first provides an image capturing method. Fig. 2 shows an exemplary flow of the image acquisition method, comprising the following steps S210 to S220:
in step S210, when it is detected that the ambient brightness exceeds the preset brightness range, a comprehensive brightness level is determined according to the ambient brightness and the brightness of the current captured image.
In the embodiment of the present disclosure, the ambient brightness is the brightness of the external environment in which the mobile terminal is currently located.
The preset brightness range may be a predefined brightness range, such as: [ a, b ], wherein a is an integer greater than 0, b is an integer greater than a, so that when the ambient brightness is detected to be less than a, or when the ambient brightness is detected to be greater than b, the brightness of the current shot image can be acquired, and thus, the present disclosure can perform situation-based processing on the ambient brightness, and only when the ambient brightness exceeds a preset brightness range, the brightness of the current shot image needs to be acquired, thereby solving the technical problem of high performance consumption caused by the fact that each frame of image needs to be processed to acquire the brightness of the image under any situation in the related art, reducing the power consumption of the mobile terminal, and ensuring the utilization rate of the computing resources of the mobile terminal.
After the brightness of the currently photographed image is acquired, a comprehensive brightness level may be determined according to the ambient brightness and the acquired brightness of the currently photographed image.
The current shot image is an image presented at the current moment in the camera. The integrated brightness level is a parameter reflecting the brightness level obtained after the environmental brightness and the brightness of the current captured image are comprehensively balanced.
In step S220, a configuration parameter of the mobile terminal is adjusted according to the integrated brightness level, so that the mobile terminal acquires an image according to the adjusted configuration parameter.
In the embodiment of the present disclosure, the configuration parameter of the mobile terminal may include an exposure parameter of the camera, where the exposure parameter of the camera may be an exposure parameter of a front camera or an exposure parameter of a rear camera.
The exposure parameters may include sensitivity and/or exposure time.
The sensitivity is also called ISO value, which is a measure of the sensitivity of the film to light and is determined by sensitivity measurement and several measurement values. Higher ISO values represent higher sensitivity to light and thus, the more dark the more clear the shot, higher ISO values are beneficial for shooting more clear objects in the dark.
The exposure time is the time during which the shutter is opened in order to project light onto the photosensitive surface of the photographic photosensitive material. Depending on the sensitivity of the photographic sensitive material and the illumination on the photosensitive surface. If the exposure time is long, the amount of light entering becomes large, and this is suitable for a case where the light conditions are relatively poor. A short exposure time is suitable for a better light.
In the embodiment of the present disclosure, the configuration parameter of the mobile terminal may further include screen brightness of the mobile terminal, so that the screen brightness of the mobile terminal may be adjusted according to the integrated brightness level.
Therefore, in an application scene of shooting or video chatting by using the front camera, when the brightness is too bright, the exposure parameter of the front camera can be adjusted according to the comprehensive brightness level, so that the technical problem of image unsharpness caused by overexposure is solved, and the quality of the acquired image is improved. When the brightness is too dark, the screen brightness of the mobile terminal (for example, the brightness is adjusted to be higher to provide a light source for a shooting object) and the exposure parameters of the front camera can be adjusted according to the comprehensive brightness level, so that the purpose of acquiring brighter images is achieved, and the definition of the acquired images is improved.
In an application scene of shooting by using the rear camera, when the brightness is too bright, the exposure parameter of the rear camera can be adjusted according to the comprehensive brightness level, so that the technical problem of image unsharpness caused by overexposure is solved, and the quality of the acquired image is improved. When the brightness is too dark, the exposure parameters of the rear camera can be adjusted according to the comprehensive brightness level, so that the purpose of acquiring brighter images in a dark light environment is achieved.
In summary, the image acquisition method provided by the embodiment of the present disclosure can reduce the performance consumption of the mobile terminal, and can acquire a clearer image no matter under the condition that the brightness is too bright or under the condition that the brightness is too dark, thereby improving the quality of the acquired image.
In the step S210, the light condition of the current external environment may be monitored in real time through a light sensor built in the mobile terminal, so as to obtain the ambient brightness. The light sensor is a sensor which converts light signals into electric signals by using a photosensitive element, can automatically sense the intensity of light and feeds back the result to the mobile terminal.
In an optional implementation manner, if it is detected that the ambient brightness does not exceed the preset brightness range (i.e., the acquired ambient brightness is greater than or equal to a and less than or equal to b), the brightness of the currently-photographed image is not acquired, so that the present invention can perform condition-based processing on the ambient brightness, and when the ambient brightness meets the preset brightness range, the step of acquiring the brightness of the currently-photographed image is omitted, thereby solving the technical problem of high performance consumption caused by the fact that the image brightness needs to be acquired under any condition in the prior art, reducing the power consumption of the mobile terminal, and ensuring the utilization rate of the computing resources of the mobile terminal.
When the ambient brightness is detected to exceed the preset brightness range, the brightness of the current shot image can be acquired. Referring to fig. 3, fig. 3 shows a flowchart for acquiring the brightness of the currently captured image according to an embodiment of the present disclosure, including steps S301-S302, and a specific embodiment is explained below with reference to fig. 3:
in step S301, the brightness value of each pixel point on the current captured image is obtained.
In an optional implementation manner, the brightness value of each pixel point on the current shot image may be obtained. The brightness value of the pixel point can be identified by a gray value, and the value range of the brightness value is 0-255. The larger the brightness value of the pixel point is, the larger the brightness of the pixel point is represented.
The current captured image may be an image in RGB format (Red, green, blue), an image in HSV format (Hue, saturation, and Value), an image in YUV format (Y denotes brightness (Luma), and U and V denote Chroma (Chroma)), and the like, and may be set by itself according to actual conditions, which is not limited in the present disclosure.
In step S302, the number of pixels included in each luminance value is counted, and the luminance of the currently photographed image is determined according to the counting result.
In an optional implementation manner, a brightness histogram corresponding to the current captured image may be drawn by using a brightness value of each pixel point in the current captured image, and then, the number of pixel points included in each brightness value is counted by using a statistical manner of the brightness histogram, so as to obtain the brightness of the current captured image.
For example, the abscissa in the luminance histogram may represent a luminance value, which may belong to RGB domain luminance, ranging from 0 to 255, and the luminance value gradually increases along the abscissa direction; the ordinate can represent the number of pixels, and along the ordinate direction, the number of pixels gradually increases. Therefore, the distribution condition of the brightness values of the pixels in the current shot image (i.e. the number of pixels contained in each brightness value) can be demonstrated through the brightness histogram.
Further, the product of each brightness value and the number of the corresponding pixel points can be obtained; and acquiring an accumulated value of a plurality of products, and dividing the accumulated value by the total pixel number of the current shot image to obtain the brightness of the current shot image. For example, taking the total number of pixels of the currently photographed image as 1000 for an example, if the number of pixels corresponding to the luminance value 20 is 200, the number of pixels corresponding to the luminance value 30 is 300, and the number of pixels corresponding to the luminance value 50 is 500, the products of the luminance values and the numbers of pixels corresponding thereto are respectively 20 × 200=4000, 30 × 300=9000, and 50 × 500=25000, so that the accumulated value of the products is 4000+9000+25000=38000, the accumulated value is divided by the number of pixels to obtain 38000/1000=38, and the luminance of the currently photographed image is 38.
After the brightness of the currently captured image is determined, the brightness level may be calculated based on the ambient brightness and the brightness of the currently captured image. Specifically, referring to fig. 4, fig. 4 shows a flowchart for determining the integrated brightness level according to an embodiment of the present disclosure, which includes steps S401 to S402, and the following describes a specific embodiment with reference to fig. 4:
in step S401, the ambient brightness and the brightness of the current captured image are respectively weighted with respective preset weights to obtain a target brightness value.
In an optional embodiment, a preset weight corresponding to the ambient brightness may be preset (for example, 0.6, which may be changed according to an actual situation without being specifically limited by the present disclosure), and a preset weight corresponding to the brightness of the current captured image may be set (for example, 0.4, which may be changed according to an actual situation without being specifically limited by the present disclosure), and then the ambient brightness and the brightness of the current captured image are multiplied by the respective preset weights, respectively, to obtain a target brightness value.
For example, taking the ambient brightness as 50 and the brightness of the current captured image as 38 as an example, the target brightness value may be 50 × 0.6+38 × 0.4=45.2.
In step S402, a comprehensive brightness level is determined according to the value range in which the target brightness value is located.
In an alternative embodiment, different corresponding relationships between the target brightness value and the integrated brightness level may be preset, and for example, the corresponding relationship between the target brightness value and the integrated brightness level may refer to the following table 1:
TABLE 1
Accordingly, referring to table 1 above, the target brightness value "46" is in the range of "5 to 50", and further, it can be determined that the corresponding integrated brightness level is set to "too dark".
In the above step S220, a correspondence relationship between the integrated brightness level and the exposure parameter of the front camera (refer to table 2 below) and a correspondence relationship between the integrated brightness level and the exposure parameter of the rear camera (refer to table 3 below) may be set in advance.
TABLE 2
| Integrated brightness level | Photosensitivity of front camera | Exposure time of front camera |
| Ultra-bright | S1 | T1 |
| Guo Liang | S2 | T2 |
| Is normal and normal | S3 | T3 |
| Too dark | S4 | T4 |
| Ultra dark | S5 | T5 |
TABLE 3
| Integrated brightness level | Sensitivity of rear camera | Exposure time of rear camera |
| Ultra-bright | S6 | T6 |
| Guo Liang | S7 | T7 |
| Is normal | S8 | T8 |
| Too dark | S9 | T9 |
| Ultra dark | S10 | T10 |
Therefore, in an application scene of acquiring an image by using the front camera, when the comprehensive brightness level is too dark, the light sensitivity of the front camera can be adjusted to S4, and the exposure time can be adjusted to T4, so that the definition of the image acquired by the front camera is ensured.
In an application scene of acquiring an image by using the rear camera, when the comprehensive brightness level is "too dark", the light sensitivity of the rear camera can be adjusted to be S9, and the exposure time can be adjusted to be T9, so that the definition of the image acquired by the rear camera is ensured.
It should be noted that, in an application scenario where the rear camera is used to acquire an image, when it is detected that the integrated brightness level is "too dark" or "ultra dark", the flash lamp or the flashlight of the mobile terminal may be controlled to be turned on to provide a light source for the shooting target, so as to improve the definition of the image acquired by the rear camera.
In the above step S220, a correspondence relationship between the integrated brightness level and the screen brightness of the mobile terminal may also be set in advance (refer to table 4 below).
TABLE 4
| Integrated brightness level | Screen brightness of mobile terminal |
| Ultra-bright | L1 |
| Guo Liang | L2 |
| Is normal | L3 |
| Too dark | L4 |
| Ultra dark | L5 |
Therefore, in an application scene of acquiring images by using the front camera, when the comprehensive brightness level is 'too dark', the screen brightness of the mobile terminal can be adjusted to be L4, so that a light source is provided for a shooting target of the front camera, and the definition of the images acquired by the front camera is ensured.
It should be noted that, the above steps S210 and S220 may be executed at regular time (for example, executed every 10 seconds, the specific duration may be set according to the actual situation, which is not specifically limited by the present disclosure), for example, in an application scenario of shooting with a front camera, the exposure level of the front camera after the mth time (an integer greater than 1) adjustment is S4, the exposure time is adjusted T4, and the screen brightness of the mobile terminal is L4, for example, if the comprehensive brightness level is "too bright" after 10 seconds, the exposure level of the front camera may be adjusted to S2, the exposure time is adjusted to T2, and the screen brightness of the mobile terminal is adjusted to L2, so that the mobile terminal collects an image according to the adjusted relevant parameters, thereby the present disclosure not only can adaptively adjust the configuration parameters of the mobile terminal in a dark environment (too dark or too dark) to improve the quality of the collected image, but also can adaptively adjust the configuration parameters of the mobile terminal in a bright environment (too bright or too bright) to improve the mobile terminal performance, thereby improving the mobile terminal performance, and borrowing the original mobile terminal performance.
The temperature of the mobile terminal can be detected, and the configuration parameters of the mobile terminal can be adjusted according to the temperature of the mobile terminal.
In an optional implementation manner, the temperature of the mobile terminal may include a temperature of a CPU of the mobile terminal, and then the temperature of the CPU may be monitored in real time through a temperature sensor built in the mobile terminal, and then the configuration parameters (parameters of a camera, and screen brightness of the mobile terminal) of the mobile terminal are adjusted according to the temperature of the CPU.
Referring to the explanation of the above steps, the correspondence between the temperature of the CPU and the sensitivity and/or time of the front camera, the correspondence between the temperature of the CPU and the sensitivity and/or exposure time of the rear camera, and the correspondence between the temperature of the CPU and the screen brightness of the mobile terminal may be preset, and then, the configuration parameters of the mobile terminal may be adjusted according to the correspondence. For example, when it is detected that the temperature of the CPU is greater than the preset temperature threshold, because the screen brightness has a greater influence on the temperature of the CPU, the screen brightness may be reduced to a first target value, the sensitivity of the camera may be increased to a second target value, and the exposure time of the camera may be increased to a third target value, so as to improve the definition of the captured image on the premise of balancing the system load.
In another optional embodiment, when the temperature of the mobile terminal is greater than the preset temperature threshold, the exposure parameter of the camera may be directly set as the preset exposure parameter, and an image is acquired according to the preset exposure parameter without executing the relevant step of adjusting the configuration parameter of the mobile terminal according to the ambient brightness and the brightness of the currently-photographed image.
In yet another alternative embodiment, when it is detected that the temperature of the mobile terminal is greater than the first temperature threshold (e.g., 20 degrees, which may be numerically changed according to actual conditions) and less than the second temperature threshold (which is greater than the first temperature threshold, e.g., 38 degrees, which may be numerically changed according to actual conditions), the configuration parameters of the mobile terminal may be dynamically adjusted according to the temperature of the mobile terminal. When the temperature of the mobile terminal is detected to be higher than the second temperature threshold value, the exposure parameter of the camera can be directly set as the preset exposure parameter so as to acquire an image according to the preset exposure parameter, and/or the screen brightness of the mobile terminal is set as the preset screen brightness, so that different processing modes can be set according to different ranges of the temperature of the mobile terminal, a new scheme for adjusting the configuration parameters of the mobile terminal according to the temperature is provided, and overload of a system is avoided.
Fig. 5 shows an overall flowchart of an image acquisition method according to an embodiment of the present disclosure, and a specific embodiment is explained below with reference to fig. 5:
collecting an input frame image through a camera;
detecting the ambient brightness through a light sensor, and starting a dim light detection algorithm to acquire the brightness of the current shot image when the ambient brightness exceeds a preset threshold value;
calculating a dim level according to the ambient brightness and the brightness of the input frame image, adjusting configuration parameters (an exposure parameter of a camera and the screen brightness of the mobile terminal) of the mobile terminal according to the dim level, and acquiring and outputting an image according to the adjusted configuration parameters;
and (3) detecting the temperature according to the temperature sensor, and turning off the dim light detection module when the temperature is greater than a preset temperature threshold (namely, a relevant step of sensing the ambient brightness through the light sensor and adjusting the configuration parameters of the mobile terminal according to the ambient brightness and the brightness of the input frame image is not required to be executed).
Based on the technical scheme, on one hand, the comprehensive brightness level is determined by integrating two factors of the environment brightness and the brightness of the current shot image, the technical problem that in the related technology, the processing result is inaccurate because the image is directly subjected to subsequent processing only according to the judgment result of the image brightness can be solved, and the comprehensiveness and the accuracy of the brightness judgment result are ensured. Furthermore, the brightness of the current shot image is detected only when the detected ambient brightness exceeds the preset brightness range, so that the problem of invalid detection caused by the fact that brightness detection needs to be carried out on each frame of image even under the environment with proper brightness in the related art is solved, and the performance consumption of the mobile terminal is reduced. On the other hand, the configuration parameters of the mobile terminal are adjusted according to the comprehensive brightness level, different configuration parameters can be set for the mobile terminal according to different comprehensive brightness levels, clear images can be collected no matter under the condition that the brightness is too bright or under the condition that the brightness is too dark, and the quality of the collected images is improved.
Exemplary devices
Having described the image capturing method according to the exemplary embodiment of the present disclosure, an image capturing apparatus according to the exemplary embodiment of the present disclosure will be described with reference to fig. 6.
Fig. 6 shows an image acquisition apparatus 600 comprising:
the detection module 610 is configured to determine a comprehensive brightness level according to the ambient brightness and the brightness of the current captured image when it is detected that the ambient brightness exceeds a preset brightness range;
and a configuration parameter adjusting module 620, configured to adjust a configuration parameter of the mobile terminal according to the comprehensive brightness level, so that the mobile terminal acquires an image according to the adjusted configuration parameter.
In an alternative embodiment, the detection module 610 is configured to:
and when the detected ambient brightness does not exceed the preset brightness range, not acquiring the brightness of the current shot image.
In an alternative embodiment, the image capturing apparatus 600 further comprises:
the brightness acquisition module is used for acquiring the brightness value of each pixel point on the current shot image;
and counting the number of pixel points contained in each brightness value, and determining the brightness of the current shot image according to the counting result.
In an alternative embodiment, the detection module 610 is configured to:
respectively carrying out weighting operation on the ambient brightness and the brightness of the current shot image and respective preset weights to obtain a target brightness value;
and determining the comprehensive brightness level according to the numerical range of the target brightness value.
In an optional embodiment, the configuration parameters of the mobile terminal include exposure parameters of a camera; the exposure parameters of the camera at least comprise one of the following parameters: exposure parameters of the front camera and exposure parameters of the rear camera;
a configuration parameter adjustment module 620 configured to:
and adjusting the exposure parameters of the camera according to the comprehensive brightness level.
In an optional embodiment, the configuration parameters of the mobile terminal further include screen brightness of the mobile terminal;
a configuration parameter adjustment module 620 configured to:
and adjusting the screen brightness of the mobile terminal according to the comprehensive brightness level.
In an alternative embodiment, the image capturing apparatus 600 further comprises:
the temperature detection module is used for detecting the temperature of the mobile terminal;
and adjusting the configuration parameters of the mobile terminal according to the temperature of the mobile terminal.
In an alternative embodiment, the temperature detection module is configured to:
and when the temperature of the mobile terminal is greater than the preset temperature threshold value, setting the exposure parameter of the camera as the preset exposure parameter so as to acquire an image according to the preset exposure parameter.
In addition, other specific details of the embodiments of the present disclosure have been described in detail in the embodiments of the invention of the above method, and are not described herein again.
Exemplary storage Medium
The storage medium of the exemplary embodiment of the present disclosure is explained below.
In the present exemplary embodiment, the above-described method may be implemented by a program product, such as a portable compact disc read only memory (CD-ROM) and including program code, and may be executed on a device, such as a personal computer. However, the program product of the present disclosure is not so limited, and in this document, a 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.
The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. A 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 (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable 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.
A computer readable signal medium may include a propagated data signal with readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A readable signal medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RE, etc., or any suitable combination of the foregoing.
Program code for carrying out operations for aspects of the present disclosure may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user computing device, partly on a remote computing device, or entirely on the remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any kind of network, including a local area network (FAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., through the internet using an internet service provider).
Exemplary Mobile terminal
A mobile terminal according to an exemplary embodiment of the present disclosure will be described with reference to fig. 7.
The mobile terminal 700 shown in fig. 7 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.
As shown in fig. 7, the mobile terminal 700 is embodied in the form of a general purpose computing device. Components of mobile terminal 700 may include, but are not limited to: at least one processing unit 710, at least one memory unit 720, a bus 730 connecting different system components (including the memory unit 720 and the processing unit 710), a display unit 740, and a camera module 770.
Where the memory unit stores program code, the program code may be executed by the processing unit 710 such that the processing unit 710 performs the steps according to various exemplary embodiments of the present disclosure as described in the above-mentioned "exemplary methods" section of this specification. For example, processing unit 710 may perform method steps, etc., as shown in fig. 2.
The memory unit 720 may include volatile memory units such as a random access memory unit (RAM) 721 and/or a cache memory unit 722, and may further include a read only memory unit (ROM) 723.
The memory unit 720 may also include programs/utilities 724 having a set (at least one) of program modules 725, such program modules 725 including, but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which, or some combination thereof, may comprise an implementation of a network environment.
The mobile terminal 700 may also communicate with one or more external devices 800, such as a keyboard, a pointing device, a bluetooth device, etc., via an input/output (I/O) interface 750. The mobile terminal 700 also includes a display unit 740 connected to the input/output (I/O) interface 750 for displaying. Moreover, the mobile terminal 700 may also communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN) and/or a public network such as the Internet) via the network adapter 760. As shown, the network adapter 760 communicates with the other modules of the mobile terminal 700 via the bus 730. It should be appreciated that although not shown, other hardware and/or software modules may be used in conjunction with the mobile terminal 700, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, among others.
It should be noted that although in the above detailed description several modules or sub-modules of the apparatus are mentioned, such division is merely exemplary and not mandatory. Indeed, the features and functions of two or more units/modules described above may be embodied in one unit/module according to embodiments of the present disclosure. Conversely, the features and functions of one unit/module described above may be further divided into embodiments by a plurality of units/modules.
Further, while the operations of the disclosed methods are depicted in the drawings in a particular order, this does not require or imply that the operations must be performed in this particular order, or that all of the illustrated operations 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.
While the spirit and principles of the present disclosure have been described with reference to several particular embodiments, it is to be understood that the present disclosure is not limited to the particular embodiments disclosed, nor is the division of aspects, which is for convenience only as the features in such aspects may not be combined to benefit. The disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (16)
1. An image acquisition method, comprising:
when the environment brightness is detected to exceed a preset brightness range, determining a comprehensive brightness level according to the environment brightness and the brightness of the current shot image;
adjusting configuration parameters of the mobile terminal according to the comprehensive brightness grade so that the mobile terminal acquires images according to the adjusted configuration parameters; the mobile terminal comprises a mobile terminal with a front camera and/or a rear camera;
when the ambient brightness is detected not to exceed the preset brightness range, the brightness of the current shot image is not collected; and adjusting the configuration parameters of the mobile terminal according to the environment brightness so that the mobile terminal acquires images according to the adjusted configuration parameters.
2. The method of claim 1, wherein the brightness of the currently captured image is determined by:
acquiring the brightness value of each pixel point on the current shot image;
and counting the number of pixel points contained in each brightness value, and determining the brightness of the current shot image according to the counting result.
3. The method of claim 1 or 2, wherein determining a composite brightness level based on the ambient brightness and the brightness of the currently captured image comprises:
respectively carrying out weighting operation on the ambient brightness and the brightness of the current shot image and respective preset weights to obtain a target brightness value;
and determining the comprehensive brightness level according to the numerical range of the target brightness value.
4. The method according to claim 3, wherein the configuration parameters of the mobile terminal comprise exposure parameters of a camera; the exposure parameters of the camera at least comprise one of the following parameters: exposure parameters of the front camera and exposure parameters of the rear camera;
the adjusting the configuration parameters of the mobile terminal according to the comprehensive brightness level comprises the following steps:
and adjusting the exposure parameters of the camera according to the comprehensive brightness level.
5. The method of claim 4, wherein the configuration parameters of the mobile terminal further include a screen brightness of the mobile terminal;
the adjusting of the configuration parameters of the mobile terminal according to the comprehensive brightness level comprises:
and adjusting the screen brightness of the mobile terminal according to the comprehensive brightness level.
6. The method of claim 1, further comprising:
detecting the temperature of the mobile terminal;
and adjusting the configuration parameters of the mobile terminal according to the temperature of the mobile terminal.
7. The method according to claim 6, wherein the adjusting the configuration parameters of the mobile terminal according to the temperature of the mobile terminal comprises:
and when the temperature of the mobile terminal is greater than a preset temperature threshold value, setting the exposure parameter of the camera as a preset exposure parameter so as to acquire an image according to the preset exposure parameter.
8. An image acquisition apparatus, comprising:
the detection module is used for determining a comprehensive brightness grade according to the environment brightness and the brightness of the current shot image when the environment brightness is detected to exceed a preset brightness range;
the configuration parameter adjusting module is used for adjusting the configuration parameters of the mobile terminal according to the comprehensive brightness grade so that the mobile terminal acquires images according to the adjusted configuration parameters; the mobile terminal comprises a mobile terminal with a front camera and/or a rear camera;
the detection module configured to: when the ambient brightness is detected not to exceed the preset brightness range, the brightness of the current shot image is not collected;
the configuration parameter adjustment module configured to: and adjusting the configuration parameters of the mobile terminal according to the environment brightness so that the mobile terminal acquires images according to the adjusted configuration parameters.
9. The apparatus of claim 8, further comprising:
the brightness acquisition module is used for acquiring the brightness value of each pixel point on the current shot image;
and counting the number of pixel points contained in each brightness value, and determining the brightness of the current shot image according to the counting result.
10. The apparatus of claim 8 or 9, wherein the detection module is configured to:
respectively carrying out weighting operation on the ambient brightness and the brightness of the current shot image and respective preset weights to obtain a target brightness value;
and determining the comprehensive brightness level according to the numerical range of the target brightness value.
11. The apparatus according to claim 10, wherein the configuration parameters of the mobile terminal comprise exposure parameters of a camera; the exposure parameters of the camera at least comprise one of the following parameters: exposure parameters of the front camera and exposure parameters of the rear camera;
the configuration parameter adjustment module configured to:
and adjusting the exposure parameters of the camera according to the comprehensive brightness level.
12. The apparatus of claim 11, wherein the configuration parameters of the mobile terminal further comprise a screen brightness of the mobile terminal;
the configuration parameter adjustment module configured to:
and adjusting the screen brightness of the mobile terminal according to the comprehensive brightness level.
13. The apparatus of claim 8, further comprising:
the temperature detection module is used for detecting the temperature of the mobile terminal;
and adjusting the configuration parameters of the mobile terminal according to the temperature of the mobile terminal.
14. The apparatus of claim 13, wherein the temperature detection module is configured to:
and when the temperature of the mobile terminal is greater than a preset temperature threshold value, setting the exposure parameter of the camera as a preset exposure parameter so as to acquire an image according to the preset exposure parameter.
15. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the method of any one of claims 1 to 7.
16. A mobile terminal, comprising:
a processor; and
a memory for storing executable instructions of the processor;
the camera module is used for collecting images;
wherein the processor is configured to perform the method of any one of claims 1-7 via execution of the executable instructions.
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