CN111435971A - Image acquisition parameter configuration method and device, terminal and readable storage medium - Google Patents
Image acquisition parameter configuration method and device, terminal and readable storage medium Download PDFInfo
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- CN111435971A CN111435971A CN201910034872.2A CN201910034872A CN111435971A CN 111435971 A CN111435971 A CN 111435971A CN 201910034872 A CN201910034872 A CN 201910034872A CN 111435971 A CN111435971 A CN 111435971A
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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
- H04N23/71—Circuitry for evaluating the brightness variation
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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
- H04N23/73—Circuitry for compensating brightness variation in the scene by influencing the exposure time
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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
- H04N23/741—Circuitry for compensating brightness variation in the scene by increasing the dynamic range of the image compared to the dynamic range of the electronic image sensors
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Abstract
The embodiment of the invention provides an image acquisition parameter configuration method, an image acquisition parameter configuration device, a terminal and a readable storage medium, wherein the method comprises the following steps: if an image acquisition instruction is detected, acquiring a target exposure corresponding to the current environment and acquiring a target ISO; wherein the target ISO satisfies an ISO upper limit limiting condition; determining target exposure time corresponding to the target exposure amount and the target ISO according to the positive correlation relationship between the exposure time and the ISO and the exposure amount; and configuring image acquisition parameters according to the target exposure, the target ISO and the target exposure time. The embodiment of the invention can improve the accuracy of the configured image acquisition parameters, improve the definition and the definition stability of the acquired image and provide possibility for improving the image effect.
Description
Technical Field
The embodiment of the invention relates to the technical field of images, in particular to an image acquisition parameter configuration method, an image acquisition parameter configuration device, a terminal and a readable storage medium.
Background
The image acquisition parameters are important parameters for controlling the image acquisition device to acquire images by the terminal, and whether the configuration of the image acquisition parameters is reasonable or not directly influences the image effect of the acquired images. Taking a typical scene of photographing as an example, the terminal can control the aperture and the shutter of the camera according to image acquisition parameters such as exposure amount, exposure time and the like, so as to finish photographing and obtain an image; in the process, whether the configuration of image acquisition parameters such as exposure amount, exposure time and the like is reasonable directly influences the image effect of the photographed image.
At present, the current image acquisition parameters are mainly configured by analyzing the image characteristics of the last acquired image. For example, color features such as color values and brightness of each pixel of the last acquired image may be analyzed to determine whether the analyzed color features match the expected image effect; if the expected image effect is not matched, adjusting image acquisition parameters such as exposure amount and exposure time on the basis of the image acquisition parameters configured last time.
However, the environment when the image is acquired may be changed, that is, the current environment may be different from the environment when the image was acquired last time, so that the image characteristics of the image acquired last time, the current image acquisition parameters are configured, there may be a certain hysteresis (that is, the configured image acquisition parameters may not match the current environment), and there may be a possibility that the image effect cannot be improved.
Disclosure of Invention
In view of this, embodiments of the present invention provide a method, an apparatus, a terminal and a readable storage medium for configuring image acquisition parameters, so as to improve accuracy of configured image acquisition parameters and provide possibility for improving image effect.
In order to solve the above problem, an embodiment of the present invention provides an image acquisition parameter configuration method, including:
if an image acquisition instruction is detected, acquiring a target exposure corresponding to the current environment and acquiring a target ISO; wherein the target ISO satisfies an ISO upper limit limiting condition;
determining target exposure time corresponding to the target exposure amount and the target ISO according to the positive correlation relationship between the exposure time and the ISO and the exposure amount;
and configuring image acquisition parameters according to the target exposure, the target ISO and the target exposure time.
The embodiment of the present invention further provides an image acquisition parameter configuration device, including:
the target exposure acquisition module is used for acquiring a target exposure corresponding to the current environment if an image acquisition instruction is detected;
the target ISO acquisition module is used for acquiring a target ISO; wherein the target ISO satisfies an ISO upper limit limiting condition;
the target exposure time determining module is used for determining target exposure time corresponding to the target exposure amount and the target ISO according to the positive correlation between the exposure time and the ISO and the exposure amount;
and the configuration module is used for configuring image acquisition parameters according to the target exposure, the target ISO and the target exposure time.
An embodiment of the present invention further provides a terminal, including: at least one memory and at least one processor;
the memory stores a program, and the processor calls the program to realize the image acquisition parameter configuration method
The embodiment of the invention also provides a readable storage medium, and the readable storage medium stores a program for realizing the image acquisition parameter configuration method.
The image acquisition configuration method provided by the embodiment of the invention can be used for configuring the image acquisition parameters when the image acquisition instruction is detected. By acquiring the target exposure corresponding to the current environment, the target exposure used for image acquisition can be matched with the current environment, and the definition of the acquired image is improved; moreover, a target ISO meeting the ISO upper limit limiting condition is obtained, and the ISO used for image acquisition can be reasonably selected; therefore, the target exposure time corresponding to the target exposure amount and the target ISO is determined according to the positive correlation between the exposure time and the exposure amount, the target exposure time used for image acquisition can be as short as possible under the conditions of keeping the target exposure amount and limiting the ISO, the shake in the image acquisition process is reduced, and the definition stability of the acquired image are improved. Furthermore, image acquisition parameters are configured according to the target exposure, the target ISO and the target exposure time, so that the accuracy of the configured image acquisition parameters can be improved, the definition and the definition stability of the acquired image can be improved, and the possibility of improving the image effect is provided.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a hardware block diagram of a terminal according to an embodiment of the present invention;
FIG. 2 is a flowchart of a method for configuring image acquisition parameters according to an embodiment of the present invention;
FIG. 3 is another flowchart of a method for configuring image acquisition parameters according to an embodiment of the present invention;
FIG. 4 is a flowchart of a method for configuring image capture parameters according to an embodiment of the present invention;
FIG. 5 is a flow chart of image acquisition provided by an embodiment of the present invention;
FIG. 6 is another flow chart of image acquisition provided by an embodiment of the present invention;
fig. 7 is a schematic diagram of an application example provided in the embodiment of the present invention;
fig. 8 is a block diagram of an image acquisition parameter configuration apparatus according to an embodiment of the present invention;
fig. 9 is another block diagram of an image acquisition parameter configuration apparatus according to an embodiment of the present invention;
fig. 10 is a further block diagram of an image acquisition parameter configuration apparatus according to an embodiment of the present invention;
fig. 11 is another block diagram of an image acquisition parameter configuration apparatus according to an embodiment of the present invention.
Detailed Description
The image acquisition parameter configuration method provided by the embodiment of the invention can measure the target exposure corresponding to the current environment when an image acquisition instruction is detected; on the premise of measuring the target exposure, under the condition of limiting ISO (light sensitivity), selecting reasonable smaller exposure time according to the corresponding relation of the exposure, the exposure time and the ISO, thereby realizing the configuration of image acquisition parameters. The embodiment of the invention can improve the definition of the acquired image through the target exposure corresponding to the current environment, and can improve the definition stability of the acquired image (such as reducing the shake in the image acquisition process) through reasonably shorter exposure time, so that the configured image acquisition parameters have higher accuracy, and the possibility of improving the image effect is provided.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As an optional example of the disclosure in the embodiment of the present invention, fig. 1 shows an optional hardware block diagram of a terminal provided in the embodiment of the present invention, where the terminal in the embodiment of the present invention may be a user equipment with an image capturing capability, such as a mobile phone, a tablet computer, a notebook computer, and other user equipment with an image capturing device (e.g., a camera);
referring to fig. 1, the terminal may include: an image acquisition device 1, a processor 2 and a memory 3.
The image capturing device 1 may be a device with image capturing capability, such as a camera; in an alternative implementation, the image capturing device 1 may capture an image by a photosensitive manner;
the processor 2 may be a CPU (Central Processing Unit), or an ASIC (Application Specific Integrated Circuit), or one or more Integrated circuits configured to implement an embodiment of the present invention, etc.;
the Memory 3 may include a high-speed RAM (Random Access Memory) Memory, and may also include a non-volatile Memory (non-volatile Memory), a disk Memory, and the like;
the image acquisition device 1, the processor 2 and the memory 3 can complete mutual communication through a bus arranged in the terminal;
it should be noted that the terminal may further include other devices (not shown) that are not necessary for understanding the disclosure of the embodiments of the present invention, such as a network card, a touch screen, etc.; these other components are not necessary to understand the disclosure of the embodiments of the present invention, and are not individually described in the embodiments of the present invention.
In the embodiment of the invention, the processor can control the image acquisition device to acquire images based on the configured image acquisition parameters; as an alternative example, the camera may have a device such as an aperture, a shutter (electronic shutter), a photoreceptor (such as a CCD element, a CMOS element, or the like); when the image is collected, the processor can control the diaphragm of the camera to work based on the configured exposure amount and control the shutter of the camera to work based on the configured exposure time, so that the photoreceptor of the camera can collect the image based on the sensed light condition;
of course, when acquiring an image, the image acquisition parameters required to be configured are not limited to exposure, exposure time, etc., and the actually configured image acquisition parameters may be more, specifically depending on the actual situation; the above examples are mainly for ease of explanation: the importance of image acquisition parameters configuration on image acquisition, namely the accurate image acquisition parameters configuration can improve the image effect.
In an embodiment of the present invention, the processor 2 may execute a program to implement the configuration of image acquisition parameters; the memory 3 may store a program for implementing the image acquisition parameter configuration method provided by the embodiment of the present invention, and the processor 2 may call and execute the program to execute the image acquisition parameter configuration method provided by the embodiment of the present invention, so as to obtain the configured image acquisition parameters. Further, the processor may control the image capturing device to capture an image according to the configured image capturing parameters.
Optionally, the program may be implemented as a subroutine in APP (application) or software, and when the APP or software calls an image capturing function, the program may be executed to configure image capturing parameters, so as to capture an image according to the configured image capturing parameters.
The following describes an image acquisition parameter configuration method provided in an embodiment of the present invention from the perspective of a terminal, and the method content described below may be implemented by the terminal executing the above program, and specifically may be implemented by a processor of the terminal executing the above program.
Fig. 2 is a flowchart of an image acquisition parameter configuration method according to an embodiment of the present invention, and referring to fig. 2, the method may include:
and step S10, detecting an image acquisition instruction.
The image acquisition instruction is an instruction for requesting acquisition of an image; optionally, the scene of the captured image includes but is not limited to: the images are acquired in a single-shot mode, and/or the images are acquired at any time in a continuous-shot mode.
As an alternative implementation, the generation of the image capturing instruction may be triggered by a user, so that the terminal detects the image capturing instruction. If in the terminal photographing scene, a user can click a photographing button of a photographing interface to trigger and generate an image acquisition instruction; as an alternative implementation, a user may also click a set entity button, such as a photographing shortcut entity key arranged on a side surface of a mobile phone shell, to trigger generation of an image acquisition instruction; as another alternative implementation, the user can also trigger and generate an image acquisition instruction through quick operations such as voice, gestures, expressions and the like in a photographing scene;
the above description of the user triggering the generation of the image capturing instruction may be applied to the single-shot mode (i.e. single image capturing) or the continuous-shot mode.
Optionally, the embodiment of the present invention may detect an image capturing instruction in a continuous shooting mode, and the continuous shooting mode may be regarded as continuous image capturing for multiple times. For example, a user can trigger to enter a continuous shooting mode, the terminal can automatically generate an image acquisition instruction at regular time in the continuous shooting mode, and the timing time can be set according to actual conditions and can be uniform or non-uniform; in another example, the first image acquisition instruction in the continuous shooting mode can be generated by user triggering, and the subsequent terminal can automatically generate the image acquisition instruction at regular time;
optionally, the exit condition of the continuous shooting mode may be that the number of the acquired images reaches a set number, or the time length of the acquired images reaches a set time length, and the like, and may be determined specifically according to actual settings.
Generally speaking, after detecting an image acquisition instruction, the terminal can perform image acquisition; in the embodiment of the invention, after the image acquisition instruction is detected and before the image acquisition is carried out, the configuration of the image acquisition parameters is required.
In an embodiment of the present invention, the configured image acquisition parameters may include: exposure time, exposure amount, and ISO; the exposure time refers to the time of the light sensor sensing light when image acquisition is performed once (for example, a picture is taken); the exposure amount refers to the light quantity sensed by the photoreceptor in the exposure time when image acquisition is carried out for one time; ISO refers to the photosensitive speed of the photoreceptor, and the higher the ISO value, the stronger the photosensitive capability of the photoreceptor, and the higher the image brightness under the same exposure time.
An optional step for configuring image acquisition parameters provided by the embodiment of the present invention may be as follows.
In step S11, the target exposure amount corresponding to the current environment is acquired.
If an image acquisition command is detected, the embodiment of the invention can measure the target exposure corresponding to the current environment, and the target exposure can be regarded as the exposure used by the currently acquired image.
As an optional implementation, in the embodiment of the present invention, the target exposure may be determined according to at least the light intensity of the current environment under the condition that the aperture is not changed; further, under the condition that the aperture is not changed, the target exposure can be determined according to the light intensity of the current environment, and other factors such as weather and time which influence the light intensity and the hardware configuration of the image acquisition device can be combined; obviously, in the case where the aperture is not changed, there may be various factors affecting the target exposure amount, and the above description is merely exemplary.
As an alternative example, the target exposure amount may be an optimum exposure amount corresponding to the current environment with the aperture unchanged; the optimal exposure can be determined by an automatic exposure technology, and the automatic exposure can automatically adjust the exposure according to the light intensity of the environment to prevent overexposure or underexposure; in the embodiment of the present invention, the optimum exposure amount may be determined by the automatic exposure technique with the aperture unchanged, and the optimum exposure amount may be set as the target exposure amount.
As an alternative example, the embodiment of the present invention may determine a plurality of exposures suitable for the current environment, sort the plurality of exposures according to the magnitude, and select the exposure at the set sorting position as the target exposure, where the set sorting position may be set according to the actual situation and the requirement of the main view image effect (such as the requirement of image brightness, etc.), and the embodiment of the present invention is not limited strictly.
And step S12, obtaining a target ISO, wherein the target ISO meets an ISO upper limit limiting condition.
The target ISO may be considered the ISO currently used to acquire images.
ISO reflects the photospeed; the ISO is large, although the photosensitive time (namely the exposure time) of the photoreceptor can be shortened, the acquired image is too noisy, and the image definition is influenced; and if the ISO is smaller, longer exposure time is needed, and if the exposure time is longer, jitter is easily generated in the image acquisition process, so that the definition stability of the image is influenced. Therefore, the image effect can be influenced by too large or too small ISO, so that the ISO for image acquisition needs to be reasonably set.
Optionally, one of the principles of configuring the image acquisition parameters in the embodiment of the present invention is as follows: images are acquired with a reasonably small exposure time with a constant target exposure. Under the principle, in order to enable the acquired image to have higher definition stability, the embodiment of the invention can limit the target ISO, and select a reasonable larger target ISO so as to select a reasonable smaller exposure time when the image is acquired currently.
Optionally, the target ISO may be limited under a set ISO upper limit limiting condition, that is, the target ISO may satisfy the ISO upper limit limiting condition; in the embodiment of the invention, the ISO upper limit limiting condition can limit the ISO upper limit used by the acquired image so as to select a reasonable larger target ISO.
As an alternative implementation, the ISO upper limit limiting condition may be determined according to the ISO system upper limit, and/or the ISO empirical upper limit; wherein, the ISO system upper limit may be an ISO upper limit of a hardware limit of the image capturing apparatus, and the ISO empirical upper limit may be an ISO upper limit set based on historical image capturing experience;
as an example, the target ISO satisfying the ISO upper limit limiting condition may include: the target ISO is not higher than the ISO system upper limit and/or the ISO empirical upper limit.
Optionally, the steps S11 and S12 may not be executed in sequence; step S11 may be executed first and then step S12 may be executed.
Step S13, determining a target exposure time corresponding to the target exposure amount and the target ISO.
The embodiment of the invention can determine the exposure time corresponding to the target ISO under the condition that the aperture is unchanged and the target exposure amount is kept, so as to obtain the target exposure time;
it can be understood that the target exposure corresponds to the current environment, and the photoreceptor can have a proper photosensitive quantity by keeping the target exposure under the condition that the aperture is not changed; further, the target ISO is limited through an ISO upper limit limiting condition, and a reasonable larger target ISO (namely a reasonable larger photosensitive speed can be obtained when an image is collected) can be selected; and then, under the condition that the aperture is unchanged, the target exposure is kept, and a reasonable larger target ISO is selected, a reasonable smaller exposure time can be correspondingly determined, and the target exposure time is obtained.
Optionally, under the condition that the aperture is not changed, the corresponding relationship between the exposure amount and the exposure time and the ISO may exist, and in the embodiment of the present invention, under the condition that the aperture is not changed, the target exposure time corresponding to the target exposure amount and the target ISO may be determined according to the corresponding relationship between the exposure amount and the exposure time and the ISO.
As one implementation, the exposure time and ISO may both have a positive correlation with the exposure amount, and the embodiment of the present invention may determine the target exposure time corresponding to the target exposure amount and the target ISO according to the positive correlation between the exposure time and ISO and the exposure amount; thereby making the target exposure time as small as possible while maintaining the target exposure amount and limiting the ISO.
It should be noted that, although the exposure amount is kept unchanged, the exposure time is smaller as the ISO is larger, in the case where the aperture is not changed; however, the larger the ISO is, the better the image effect is not represented, because the too large ISO may cause too many image noise points, the embodiment of the present invention selects a reasonably large target ISO through step S12, and correspondingly determines a reasonably small target exposure time through step S13, so that the target exposure time used for image acquisition may be as small as possible under the condition of keeping the target exposure and limiting the ISO, reducing jitter in the image acquisition process, and improving the definition and definition stability of the acquired image.
And step S14, configuring image acquisition parameters according to the target exposure, the target ISO and the target exposure time.
After determining the target exposure, the target ISO and the target exposure time, configuring image acquisition parameters by using the target exposure, the target ISO and the target exposure time; for example, the exposure amount in the image acquisition parameters may be configured as a target exposure amount, the ISO in the image acquisition parameters may be configured as a target ISO, and the exposure time in the image acquisition parameters may be configured as a target exposure time.
Optionally, the image acquisition parameters may also include more other parameters, and the configuration of other parameters is not limited in the embodiment of the present invention; in an embodiment of the present invention, the configured image acquisition parameters may at least include: target exposure, target ISO and target exposure time.
The embodiment of the invention can configure the image acquisition parameters when detecting the image acquisition instruction; the target exposure corresponding to the current environment is obtained, so that the target exposure used for image acquisition is matched with the current environment; moreover, a target ISO meeting the ISO upper limit limiting condition is obtained, and the ISO used for image acquisition can be reasonably selected; therefore, the target exposure time corresponding to the target exposure amount and the target ISO is determined according to the positive correlation between the exposure time and the exposure amount, the target exposure amount can be kept and the ISO is limited, the target exposure time used for image acquisition is as short as possible, the jitter in the image acquisition process is reduced, and the definition stability of the acquired image are improved. And further, according to the target exposure, the target ISO and the target exposure time, the configuration of image acquisition parameters can be realized.
Based on the image acquisition parameter configuration method provided by the embodiment of the invention, sufficient photosensitive quantity can be sensed during image acquisition through the target exposure corresponding to the current environment, and the definition of the acquired image is improved; and under the condition of keeping the target exposure, selecting the target exposure time as small as possible based on the target ISO, reducing the shake in the image acquisition process through the target exposure time as small as possible, and improving the definition and the definition stability of the acquired image.
The image acquisition parameter configuration method provided by the embodiment of the invention can enable the configured image acquisition parameters to be matched with the current environment, improves the accuracy of the configured image acquisition parameters, can improve the definition and the definition stability of the acquired image, and provides possibility for improving the image effect.
Further, after the image capturing parameters are configured in step S14, the embodiment of the present invention may capture an image according to the configured image capturing parameters; for example, the image acquisition device may be controlled to acquire images according to the configured image acquisition parameters.
As an alternative implementation, the relationship between exposure time and ISO and exposure amount may include: under the condition that the aperture is not changed, the product of the exposure time and the ISO and the exposure amount form a linear corresponding relation;
in the linear correspondence relationship, the exposure time and the exposure amount are in a positive correlation (i.e., the exposure amount is larger as the exposure time is longer), and ISO and the exposure amount are also in a positive correlation (i.e., the exposure amount is larger as the ISO is larger).
As an optional implementation of determining the target exposure time, the embodiment of the present invention may determine the target exposure time corresponding to the target exposure amount and the target ISO according to a linear correspondence between a product of the exposure time and the ISO and an exposure amount under a condition that an aperture is not changed;
as an alternative example, the product of the exposure time and ISO, in linear correspondence with the exposure amount, can be expressed using the following formula:
exposure amount k exposure time ISO; wherein k is a constant;
alternatively, after the target exposure amount and the target ISO are determined, the corresponding target exposure time may be determined according to the above formula.
It should be further noted that, in general, the correspondence between the exposure dose and the exposure time and the ISO is mainly used to guide the adjustment of the hardware configuration of the image capturing apparatus, such as the adjustment of the aperture configuration, the shutter configuration, the photosensitive material configuration of the photoreceptor, and the like, based on the correspondence between the exposure dose and the exposure time and the ISO; the embodiment of the invention utilizes the corresponding relation to configure the image acquisition parameters, thereby configuring the numerical values of the image acquisition parameters in a software processing layer and achieving the purpose of improving the image effect under the condition of unchanged hardware configuration.
As an alternative implementation of the disclosure of the embodiment of the present invention, the ISO upper limit limiting condition may be determined according to the ISO system upper limit and the ISO empirical upper limit. Optionally, the target ISO satisfying the ISO upper limit limiting condition may include: the target ISO is not higher than the ISO system upper limit and the ISO empirical upper limit; for example, when determining the target ISO, the minimum value of the ISO system upper limit and the ISO empirical upper limit may be used as the target ISO.
Optionally, fig. 3 shows another flowchart of the image acquisition parameter configuration method provided in the embodiment of the present invention, and referring to fig. 3, the flowchart may include:
and step S20, detecting an image acquisition instruction.
Step S20 can be found in reference to the description of step S10 shown in fig. 2. Step S20 may support detecting an image capture command in the single-shot mode and also support detecting an image capture command in the continuous-shot mode.
In step S21, the target exposure amount corresponding to the current environment is acquired.
Step S21 can be found in reference to the description of step S11 shown in fig. 1. As an alternative implementation, the embodiment of the invention can determine the corresponding optimal exposure of the current environment, and take the latest exposure as the target exposure.
And step S22, selecting a minimum value from the ISO system upper limit and the ISO experience upper limit as the target ISO.
Optionally, the ISO system upper limit may be an ISO upper limit of a hardware limit of the image capturing apparatus; in the terminal, the setting of ISO may be a staircase type, ISO may be a fixed plurality of values and have an upper limit (i.e., ISO system upper limit) and a lower limit, which may be determined by the hardware configuration of the image capturing apparatus (e.g., the size of the aperture, the characteristics of the photosensitive material of the photoreceptor, etc. may determine the upper limit and the lower limit of ISO); in one example, ISO may be a fixed number of values with upper and lower limits of 200, 400, 800, 1200, etc.;
the ISO experience upper limit may be set based on historical image acquisition experience, for example, the ISO experience upper limit may be an ISO upper limit obtained based on experience to ensure that an image is clear and noise points are small; for example, the ISO empirical upper limit may be set to 800;
it should be noted that the specific values shown above are only exemplary and are used for understanding the disclosure of the embodiments of the present invention, and the present invention should not be limited by the specific values.
Step S22 shows that the minimum value is selected from the ISO system upper limit and the ISO experience upper limit on the spot as the target ISO; optionally, step S22 may specifically include: acquiring an ISO system upper limit and an ISO experience upper limit; and comparing the upper limit of the ISO system with the upper limit of the ISO experience, and selecting the minimum value of the comparison result as the target ISO.
Step S23, determining a target exposure time corresponding to the target exposure amount and the target ISO.
Optionally, possible implementations of step S23 can refer to the foregoing description, and are not described herein again.
And step S24, configuring image acquisition parameters according to the target exposure, the target ISO and the target exposure time.
Optionally, if the terminal configures the image acquisition parameters once in the image acquisition parameter configuration mode provided by the embodiment of the present invention, the upper limit of the ISO system and the upper limit of the ISO experience may be fixed under the condition that the terminal is not changed; as an alternative to step S22, the embodiment of the present invention may record the acquired target ISO, so that when the target ISO needs to be acquired next time, if there is a recorded target ISO, the recorded target ISO is acquired.
Alternatively, the terminal may perform step S22 when the target ISO is acquired for the first time, and perform the above-described alternative step of step S22 when the target ISO is not acquired for the first time. For example, the first time the terminal acquires the target ISO scenario may include: after the terminal is provided with the APP or the software, the image acquisition function of the APP or the software is called for the first time.
Of course, the embodiment of the present invention may also support that step S22 is executed each time the target ISO is acquired, that is, the terminal may select the minimum value from the ISO system upper limit and the ISO experience upper limit as the target ISO on the spot each time the target ISO is acquired.
In conjunction with the above alternative steps using step S22 and step S22, optionally, fig. 4 shows a further flowchart of the image acquisition parameter configuration method provided by the embodiment of the present invention, and the contents shown in fig. 4 and the corresponding contents described above are mutually referred to;
referring to fig. 4, the process may include:
and step S30, detecting an image acquisition instruction.
In step S31, the target exposure amount corresponding to the current environment is acquired.
Step S32, determine whether there is a recorded target ISO, if not, execute step S33, if yes, execute step S34.
Optionally, the recorded target ISO includes: a minimum value historically selected from the ISO system upper limit and the ISO empirical upper limit;
as an optional implementation, the embodiment of the present invention may record ISO in a set storage space (such as a table, a text, and the like), and query whether the set storage space has the recorded ISO when a target ISO needs to be acquired (such as after an image acquisition instruction is detected, or after a target exposure amount is acquired); if not, the terminal currently executes the image acquisition parameter configuration method provided by the embodiment of the invention for the first time, and does not have a target ISO determined by history; if yes, the terminal is proved to have historically executed the image acquisition parameter configuration method provided by the embodiment of the invention and has a target ISO determined by history.
And step S33, selecting a minimum value from the ISO system upper limit and the ISO experience upper limit as the target ISO.
And step S34, acquiring the recorded target ISO.
Step S35, determining a target exposure time corresponding to the target exposure amount and the target ISO.
And step S36, configuring image acquisition parameters according to the target exposure, the target ISO and the target exposure time.
Optionally, in the embodiment of the present invention, before any image acquisition in the continuous shooting mode, the image acquisition parameter configuration method provided in the embodiment of the present invention may be used to configure image acquisition parameters, so that an image acquired in any time in the continuous shooting mode has higher definition and definition stability;
taking an example that the terminal automatically generates the image acquisition instruction at regular time in the continuous shooting mode, optionally, fig. 5 shows an image acquisition flow provided by the embodiment of the present invention, and referring to fig. 5, the flow may include:
step S40, the continuous shooting mode is entered.
Optionally, the user may trigger the continuous shooting mode to enter, for example, in a shooting scene, the user may click a continuous shooting button of the shooting interface to trigger the continuous shooting mode to enter.
And step S41, judging whether the timing time reaches the next image acquisition time, if so, executing step S42, and if not, executing step S41.
In the continuous shooting mode, the terminal can automatically generate the image acquisition instruction at regular time, and the timing time for generating the image acquisition instruction at two adjacent times can be the same or different (namely, the timing time can be uniform or nonuniform), and can be set according to the actual situation.
And step S42, generating an image acquisition instruction.
Step S43, obtaining a target exposure corresponding to the current environment and obtaining a target ISO; determining a target exposure time corresponding to the target exposure amount and the target ISO; and configuring image acquisition parameters according to the target exposure, the target ISO and the target exposure time.
Based on the image acquisition instruction generated in step S42, the terminal may detect the image acquisition instruction, so as to configure the image acquisition parameters by using the image acquisition parameter configuration method provided in the embodiment of the present invention. The contents of the image acquisition parameter configuration method provided by the embodiment of the present invention can be described with reference to the corresponding parts in the foregoing description, and are not described herein again.
And step S44, acquiring images according to the configured image acquisition parameters.
Step S45, determining whether to exit the continuous shooting mode, if yes, executing step S46, and if no, executing step S41.
The exit condition of the continuous shooting mode may be that the number of the acquired images reaches a set number, or the image acquisition duration reaches a set duration, and the like, and may be determined according to actual settings.
And step S46, finishing image acquisition.
In the continuous shooting mode, the image acquisition parameter configuration method provided by the embodiment of the invention can be used for reconfiguring the image acquisition parameters when an image acquisition instruction is detected, so that image acquisition is carried out according to the reconfigured image acquisition parameters when an image is acquired each time.
Compared with the traditional mode of configuring the current image acquisition parameters by acquiring the image characteristics of the image at the last time, the embodiment of the invention can enable the image acquisition parameters used by acquiring the image at each time to be matched with the current environment, reduce the hysteresis of the image acquisition parameter configuration, improve the accuracy of the configured image acquisition parameters, improve the definition and the definition stability of the acquired image and provide possibility for improving the image effect. Meanwhile, the image acquisition parameter configuration method provided by the embodiment of the invention can avoid a large amount of calculation caused by analyzing the image characteristics, reduce the calculated amount in the image acquisition parameter configuration process, improve the timeliness of image acquisition parameter configuration in the continuous shooting mode and improve the rapid continuous shooting effect of images in the continuous shooting mode.
The embodiment of the invention configures the image acquisition parameters before acquiring the image each time, mainly, so that the configured image acquisition parameters can be matched with the current environment, and the image acquired each time has higher definition and definition stability. The light intensity of the environment is used as an important environmental factor influencing the image effect, when the light intensity of the environment is not changed greatly, the image acquisition parameters used in the last image acquisition are utilized to continuously acquire the image, and a better image effect can also be obtained (namely when the environmental condition is not changed greatly, the image acquisition parameters used in the last image acquisition can be continuously used). Based on this, as an alternative, the inventor of the present invention further proposes that the image acquisition parameters are reconfigured only when the light intensity of the current environment changes greatly, otherwise, the image acquisition parameters used when the image was acquired last time are utilized.
Optionally, fig. 6 shows another flow of image acquisition provided by the embodiment of the present invention, and referring to fig. 6, the flow may include:
and step S50, detecting an image acquisition instruction.
And step S51, acquiring the light intensity of the current environment.
Optionally, the light intensity of the current environment can be detected by a light intensity sensor arranged on the terminal, so as to obtain the light intensity of the current environment; the light intensity sensor and the image acquisition device can be arranged on the same surface or opposite surfaces of the terminal, and the arrangement position of the light intensity sensor can be determined according to the actual situation; for example, when a rear camera is used for collecting images, the light intensity sensor can be arranged at the rear part or the front part.
Step S52, determining whether the difference between the light intensity of the current environment and the light intensity of the last image acquisition exceeds a predetermined difference, if not, executing step S53, and if so, executing step S54.
The embodiment of the invention can record the light intensity when the image is acquired every time, and judge whether the light intensity of the current environment is greatly changed compared with the light intensity when the image is acquired last time or not by comparing the difference value of the light intensity of the current environment and the light intensity when the image is acquired last time.
And step S53, acquiring images according to the image acquisition parameters used in the last image acquisition.
Optionally, if the difference between the light intensity of the current environment and the light intensity of the image acquired last time does not exceed the predetermined difference, the light intensity of the current environment is considered to be not changed much, the image acquisition parameters used in the last image acquisition can be continuously used for acquiring the current image, and a better image effect can be obtained.
Optionally, the image acquisition parameters used in the last image acquisition may be image acquisition parameters configured last N times, where N is the order of newly reconfiguring image acquisition parameters; for example, when the image was acquired last time, the light intensity of the environment changes greatly, and the image acquisition parameters used when the image was acquired last time may be the image acquisition parameters reconfigured last time, compared to the current situation; for another example, when the image is acquired last time, the light intensity of the environment does not change much, and the image acquisition parameters used when the image is acquired last time can be along with the image acquisition parameters reconfigured before the last time, and so on.
Optionally, in the embodiment of the present invention, at least when the image was acquired last time, the image acquisition parameter used when the image was acquired last time may be recorded, so that when the determination result in step S52 is negative, the recorded image acquisition parameter used when the image was acquired last time may be obtained, and the image may be acquired according to the image acquisition parameter used when the image was acquired last time. Optionally, after recording the image acquisition parameters used in the last image acquisition, the record may maintain the set time valid, and after the set time is exceeded, the image acquisition parameters used in the last image acquisition may be discarded.
In step S54, the target exposure amount corresponding to the current environment is acquired.
And step S55, obtaining a target ISO, wherein the target ISO meets an ISO upper limit limiting condition.
Step S56, determining a target exposure time corresponding to the target exposure amount and the target ISO.
And step S57, configuring image acquisition parameters according to the target exposure, the target ISO and the target exposure time.
When the difference between the light intensity of the current environment and the light intensity of the last image acquisition exceeds a preset difference, the light intensity of the current environment is considered to be changed greatly, and image acquisition parameters need to be reconfigured.
And step S58, acquiring images according to the configured image acquisition parameters.
Optionally, the method shown in fig. 6 may determine whether to reconfigure the image acquisition parameters based on the light intensity change condition of the current environment, and the method may be applicable to image acquisition in a single-shot mode, and may also be applicable to image acquisition in any time in a continuous-shot mode.
While various embodiments of the present invention have been described above, various alternatives described in the various embodiments can be combined and cross-referenced without conflict to extend the variety of possible embodiments that can be considered disclosed and disclosed in connection with the embodiments of the present invention.
The image acquisition parameter configuration method provided by the embodiment of the invention can be applied to any scene with image acquisition requirements, such as a single-shot mode or a continuous shooting mode in a shooting scene, shooting in a video scene and the like. As an optional application example of the embodiment of the present invention, the image acquisition parameter configuration method provided in the embodiment of the present invention may be applied to shooting of road images, street view images, door face images, and indoor door face images of a map;
in an optional application example, in order to make an image library of a map (particularly a navigation map) richer and more comprehensive, a map operator can issue a shooting task to a user (the shooting task can be an image supported and displayed by the shooting map, such as a road image, a street view image, a door face image, an indoor door face image and the like), the user can shoot the image by pointing to a place, and upload information of the shot image, the current position, the direction and the like so as to perfect the image library of the rich map;
as shown in fig. 7, taking street view image shooting as an example, after a user arrives at a designated location, the street view can be shot in a continuous shooting mode of a mobile phone, and image acquisition parameters can be configured by using the image acquisition parameter configuration method provided by the embodiment of the invention during each shooting, so that the definition and the definition stability of the street view image shot each time in the continuous shooting mode are improved;
after the mobile phone finishes shooting, a plurality of street view images shot in a continuous shooting mode, the current geographic position and the current direction indicated by the mobile phone can be uploaded to a server;
the server records the current geographic position and a plurality of street view images corresponding to the current direction, so that an image library of the map can be enriched, and services such as street view images of the map are optimized.
Obviously, the above application example is only optional, and is only an optional application scenario for illustrating the embodiment of the present invention; of course, the image acquisition parameter configuration method provided by the embodiment of the invention can be applied to any scene with image acquisition requirements, and any APP or software with an image acquisition function can use the image acquisition parameter configuration method provided by the embodiment of the invention, so as to improve the effect of acquired images.
In the following, the image acquisition parameter configuration apparatus provided in the embodiment of the present invention is introduced, and the image acquisition parameter configuration apparatus described below may be regarded as a functional module architecture that is required to be set by a terminal to implement the image acquisition parameter configuration method provided in the embodiment of the present invention. The contents of the image capturing parameter configuring apparatus described below may be referred to in correspondence with the contents of the image capturing parameter configuring method described above.
Fig. 8 is a block diagram of an image acquisition parameter configuration apparatus according to an embodiment of the present invention, where the image acquisition parameter configuration apparatus is applicable to a terminal, and referring to fig. 8, the image acquisition parameter configuration apparatus may include:
a target exposure acquiring module 100, configured to acquire a target exposure corresponding to a current environment if an image acquisition instruction is detected;
a target ISO acquiring module 200 for acquiring a target ISO; wherein the target ISO satisfies an ISO upper limit limiting condition;
alternatively, the target exposure amount acquisition module 100 and the target ISO acquisition module 200 may be executed out of order; the target exposure amount acquisition module 100 may be executed first and the target ISO acquisition module 200 may be executed later.
A target exposure time determination module 300, configured to determine a target exposure time corresponding to the target exposure amount and the target ISO according to a positive correlation between the exposure time and the ISO and the exposure amount;
and the configuration module 400 is used for configuring image acquisition parameters according to the target exposure, the target ISO and the target exposure time.
Optionally, the target exposure time determining module 300 is configured to determine the target exposure time corresponding to the target exposure amount and the target ISO according to a positive correlation between the exposure time and the exposure amount, and may specifically include:
and determining a target exposure time corresponding to the target exposure amount and the target ISO according to the linear corresponding relation between the exposure time and the ISO and the exposure amount.
Optionally, the target exposure amount obtaining module 100 may obtain the target exposure amount corresponding to the current environment under the condition that the aperture is not changed; the target exposure time determination module 300 may determine a target exposure time corresponding to the target exposure amount and the target ISO without changing an aperture.
Optionally, the target ISO satisfying the ISO upper limit limiting condition may include: the target ISO is not higher than the ISO system upper limit and/or the ISO empirical upper limit; the ISO system upper limit is at least determined by hardware of the image acquisition device, and the ISO empirical upper limit is a set ISO upper limit.
Optionally, in an optional implementation, if the target ISO satisfies an ISO upper limit limiting condition, the method includes: the target ISO is not higher than the ISO system upper limit and the ISO empirical upper limit; optionally, the target ISO acquiring module 200 is configured to acquire a target ISO, and may specifically include:
the minimum value is selected from the ISO system upper limit and the ISO empirical upper limit as the target ISO.
Optionally, in another optional implementation, if the target ISO satisfies the ISO upper limit limiting condition, the method includes: the target ISO is not higher than the ISO system upper limit and the ISO empirical upper limit; optionally, the target ISO acquiring module 200 is configured to acquire a target ISO, and may specifically include:
judging whether a recorded target ISO exists; the recorded target ISO includes: a minimum value historically selected from the ISO system upper limit and the ISO empirical upper limit;
if the recorded target ISO does not exist, selecting a minimum value from an ISO system upper limit and an ISO experience upper limit as the target ISO;
and if the recorded target ISO exists, acquiring the recorded target ISO.
Optionally, fig. 9 shows another block diagram of the image acquisition parameter configuration apparatus according to the embodiment of the present invention, and in combination with fig. 8 and fig. 9, the image acquisition parameter configuration apparatus may further include:
and an instruction generating module 500, configured to generate an image acquisition instruction at regular time in the continuous shooting mode.
Optionally, fig. 10 shows a further block diagram of the image acquisition parameter configuration apparatus according to the embodiment of the present invention, and in combination with fig. 8 and 10, the image acquisition parameter configuration apparatus may further include:
the light intensity detection module 600 is used for acquiring the light intensity of the current environment;
a first executing module 700, configured to collect an image according to an image collection parameter used when the image was collected last time if a difference between the light intensity of the current environment and the light intensity when the image was collected last time does not exceed a predetermined difference;
a second executing module 800, configured to trigger the target exposure amount obtaining module to perform the step of obtaining the target exposure amount corresponding to the current environment and trigger the target ISO obtaining module to perform the step of obtaining the target ISO if the difference between the light intensity of the current environment and the light intensity when the image was collected last time exceeds the predetermined difference.
Optionally, fig. 11 shows another block diagram of the image acquisition parameter configuration apparatus according to the embodiment of the present invention, and with reference to fig. 8 and fig. 11, the image acquisition parameter configuration apparatus may further include:
and an image acquisition module 900, configured to acquire an image according to the configured image acquisition parameter.
The image acquisition parameter configuration device provided by the embodiment of the invention can enable the configured image acquisition parameters to be matched with the current environment, improves the accuracy of the configured image acquisition parameters, can improve the definition and the definition stability of the acquired image, and provides possibility for improving the image effect.
The embodiment of the invention also provides a terminal, and the terminal can load the image acquisition parameter configuration device in a program form.
Optionally, an optional structure of the terminal provided in the embodiment of the present invention may be as shown in fig. 1, and includes: at least one processor and at least one memory;
the memory stores a program, and the processor calls the program to realize the image acquisition parameter configuration method.
Optionally, the program may be specifically configured to:
if an image acquisition instruction is detected, acquiring a target exposure corresponding to the current environment and acquiring a target ISO; wherein the target ISO satisfies an ISO upper limit limiting condition;
determining target exposure time corresponding to the target exposure amount and the target ISO according to the positive correlation relationship between the exposure time and the ISO and the exposure amount;
and configuring image acquisition parameters according to the target exposure, the target ISO and the target exposure time.
Optionally, the refining function and the expanding function of the program may be described with reference to the corresponding parts in the foregoing description, and are not described again here.
The embodiment of the invention also provides a readable storage medium, which comprises but is not limited to a high-speed RAM memory, a nonvolatile memory, a disk memory and the like; in an embodiment of the present invention, the readable storage medium may store a program for implementing the image acquisition parameter configuration method described above.
Alternatively, the program stored in the readable storage medium may be adapted to be executed by a processor.
Optionally, the program may be specifically configured to:
if an image acquisition instruction is detected, acquiring a target exposure corresponding to the current environment and acquiring a target ISO; wherein the target ISO satisfies an ISO upper limit limiting condition;
determining target exposure time corresponding to the target exposure amount and the target ISO according to the positive correlation relationship between the exposure time and the ISO and the exposure amount;
and configuring image acquisition parameters according to the target exposure, the target ISO and the target exposure time.
Optionally, the refining function and the expanding function of the program may be described with reference to the corresponding parts in the foregoing description, and are not described again here.
The same or similar parts between the various embodiments in this specification may be referred to one another. Although the embodiments of the present invention have been disclosed, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (15)
1. An image acquisition parameter configuration method is characterized by comprising the following steps:
if an image acquisition instruction is detected, acquiring a target exposure corresponding to the current environment and acquiring a target light sensitivity ISO; wherein the target ISO satisfies an ISO upper limit limiting condition;
determining target exposure time corresponding to the target exposure amount and the target ISO according to the positive correlation relationship between the exposure time and the ISO and the exposure amount;
and configuring image acquisition parameters according to the target exposure, the target ISO and the target exposure time.
2. The method of claim 1, wherein the determining the target exposure time corresponding to the target exposure amount and the target ISO according to the positive correlation between the exposure time and the ISO and the exposure amount comprises:
and determining a target exposure time corresponding to the target exposure amount and the target ISO according to the linear corresponding relation between the exposure time and the ISO and the exposure amount.
3. The image acquisition parameter configuration method according to claim 1 or 2, wherein the target ISO satisfying an ISO upper limit limiting condition includes: the target ISO is not higher than the ISO system upper limit and/or the ISO empirical upper limit; the ISO system upper limit is at least determined by hardware of the image acquisition device, and the ISO empirical upper limit is a set ISO upper limit.
4. The image acquisition parameter configuration method according to claim 3, wherein the target ISO satisfying an ISO upper limit limiting condition comprises: the target ISO is not higher than the ISO system upper limit and the ISO empirical upper limit; the obtaining of the target ISO includes:
the minimum value is selected from the ISO system upper limit and the ISO empirical upper limit as the target ISO.
5. The image acquisition parameter configuration method according to claim 3, wherein the target ISO satisfying an ISO upper limit limiting condition comprises: the target ISO is not higher than the ISO system upper limit and the ISO empirical upper limit; the obtaining of the target ISO includes:
judging whether a recorded target ISO exists; the recorded target ISO includes: a minimum value historically selected from the ISO system upper limit and the ISO empirical upper limit;
if the recorded target ISO does not exist, selecting a minimum value from an ISO system upper limit and an ISO experience upper limit as the target ISO;
and if the recorded target ISO exists, acquiring the recorded target ISO.
6. The image acquisition parameter configuration method according to claim 1, further comprising:
and under the continuous shooting mode, generating an image acquisition instruction at regular time.
7. The method according to claim 1 or 6, wherein if an image capture command is detected, the method further comprises:
acquiring the light intensity of the current environment;
if the difference value between the light intensity of the current environment and the light intensity of the last image acquisition does not exceed the preset difference value, acquiring an image according to the image acquisition parameters used in the last image acquisition;
and if the difference value between the light intensity of the current environment and the light intensity of the last image acquisition exceeds a preset difference value, triggering and executing the step of acquiring the target exposure corresponding to the current environment and the step of acquiring the target ISO.
8. The image acquisition parameter configuration method according to claim 1 or 6, further comprising:
and acquiring the image according to the configured image acquisition parameters.
9. An image acquisition parameter configuration device, comprising:
the target exposure acquisition module is used for acquiring a target exposure corresponding to the current environment if an image acquisition instruction is detected;
the target ISO acquisition module is used for acquiring target sensitivity ISO; wherein the target ISO satisfies an ISO upper limit limiting condition;
the target exposure time determining module is used for determining target exposure time corresponding to the target exposure amount and the target ISO according to the positive correlation between the exposure time and the ISO and the exposure amount;
and the configuration module is used for configuring image acquisition parameters according to the target exposure, the target ISO and the target exposure time.
10. The apparatus according to claim 9, wherein the target exposure time determining module is configured to determine the target exposure time corresponding to the target exposure amount and the target ISO according to a positive correlation between the exposure time and the exposure amount, and specifically comprises:
and determining a target exposure time corresponding to the target exposure amount and the target ISO according to the linear corresponding relation between the exposure time and the ISO and the exposure amount.
11. The apparatus according to claim 9 or 10, wherein the target ISO satisfying an ISO upper limit limiting condition comprises: the target ISO is not higher than the ISO system upper limit and the ISO empirical upper limit; the ISO system upper limit is at least determined by hardware of an image acquisition device, and the ISO empirical upper limit is a set ISO upper limit;
the target ISO obtaining module is configured to obtain a target ISO, and specifically includes:
the minimum value is selected from the ISO system upper limit and the ISO empirical upper limit as the target ISO.
12. The image acquisition parameter configuration device according to claim 9, further comprising:
and the instruction generating module is used for generating an image acquisition instruction at regular time in the continuous shooting mode.
13. The image acquisition parameter configuration device according to claim 9 or 12, further comprising:
the light intensity detection module is used for acquiring the light intensity of the current environment;
the first execution module is used for acquiring an image according to the image acquisition parameters used when the image is acquired last time if the difference value between the light intensity of the current environment and the light intensity when the image is acquired last time does not exceed the preset difference value;
and the second execution module is used for triggering the target exposure quantity acquisition module to execute the step of acquiring the target exposure quantity corresponding to the current environment and triggering the target ISO acquisition module to execute the step of acquiring the target ISO if the difference value between the light intensity of the current environment and the light intensity when the image is acquired last time exceeds a preset difference value.
14. A terminal, comprising: at least one memory and at least one processor;
the memory stores a program, and the processor calls the program to implement the image acquisition parameter configuration method according to any one of claims 1 to 8.
15. A readable storage medium, characterized in that the readable storage medium stores a program for implementing the image acquisition parameter configuration method according to any one of claims 1 to 8.
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