WO2021083173A1

WO2021083173A1 - Exposure control method and device, and storage medium

Info

Publication number: WO2021083173A1
Application number: PCT/CN2020/124269
Authority: WO
Inventors: 孙少辉
Original assignee: Oppo广东移动通信有限公司
Priority date: 2019-10-31
Filing date: 2020-10-28
Publication date: 2021-05-06
Also published as: CN110784659B; CN110784659A

Abstract

Embodiments of the present application disclose an exposure control method and device, and a storage medium. The method comprises: acquiring multiple pieces of environmental brightness information of a scene to be captured; determining current environmental parameters using the multiple pieces of environmental brightness information, wherein the current environmental parameters comprise a current brightness weighted mean value and a current light uniformity parameter; determining a current exposure parameter according to the current environmental parameters and preset correspondences between environmental parameters and exposure parameters; and when an image sensor acquires an image of the scene, performing exposure control on the image sensor according to the current exposure parameter.

Description

Exposure control method and device, and storage medium

Cross-references to related applications

This application is filed based on the Chinese patent application with the application number 201911052798.3, the filing date is October 31, 2019, and the application title is "an exposure control method and device, storage medium", and the priority of the Chinese patent application is claimed. The entire content of the patent application is hereby incorporated into this application by way of introduction.

Technical field

The embodiments of the present application relate to the field of image processing technology, and in particular, to an exposure control method and device, and a storage medium.

Background technique

An image sensor, also called a photosensitive element, is a device that converts light signals into electronic signals, and is widely used in digital cameras and other electro-optical devices.

During the imaging process of the image sensor, proper exposure settings can accurately obtain image brightness information, so as to finally obtain a better quality image. The automatic exposure algorithm of the image sensor mainly relies on the current exposure setting and the brightness information collected to evaluate the current environmental brightness and further decide the next exposure setting. However, the environmental brightness is not a sufficient reflection of the environmental conditions. The initial exposure parameters, or the exposure parameters in any case, are evaluated and set by simply relying on the environmental brightness. There is a certain exposure error in the unevenly lit scene, which leads to the final imaging. not effectively.

Summary of the invention

The embodiments of the present application provide an exposure control method and device, and a storage medium. By analyzing the weighted average brightness and light uniformity parameters of the scene to be photographed, the current exposure parameters are determined for exposure control, and the imaging effect of the image sensor is improved.

The technical solutions of the embodiments of the present application are implemented as follows:

In the first aspect, an embodiment of the present application provides an exposure control method, the method including:

Collect multiple environmental brightness information of the scene to be photographed;

Determine current environmental parameters by using the multiple environmental brightness information; the current environmental parameters include current brightness weighted average and current light uniformity parameters;

Determine the current exposure parameter according to the current environmental parameter and the corresponding relationship between the preset environmental parameter and the exposure parameter;

When the image sensor collects the image of the scene to be shot, the image sensor is exposed to exposure control according to the current exposure parameter.

In the above exposure control method, the determining the current environmental parameters by using the multiple environmental brightness information includes:

Performing a weighted average on the plurality of environmental brightness information by using a plurality of preset weights to obtain the weighted average value of the current brightness; the plurality of preset weights are in a one-to-one correspondence with the plurality of environmental brightness information;

At least one high-brightness information and at least one low-brightness information are selected from the plurality of environmental brightness information; each high-brightness information in the at least one high-brightness information is larger than each of the at least one low-brightness information. A low-brightness message;

The current light uniformity parameter is determined according to the at least one high-brightness information and the at least one low-brightness information.

In the above exposure control method, the selecting at least one high-brightness information and at least one low-brightness information from the plurality of environmental brightness information includes:

Sorting the plurality of environmental brightness information according to size to obtain a brightness information sequence;

From the brightness information sequence, the at least one high-brightness information and the at least one low-brightness information are selected.

In the above exposure control method, the determining the current light uniformity parameter according to the at least one high-brightness information and the at least one low-brightness information includes:

Determining an average value of the at least one high-brightness information to obtain a high-brightness average value;

Determining an average value of the at least one low-luminance information to obtain a low-luminance average value;

The current light uniformity parameter is determined according to the high-brightness average value and the low-brightness average value.

In the above exposure control method, the determining the current exposure parameter according to the current environmental parameter and the corresponding relationship between the preset environmental parameter and the exposure parameter includes:

Searching for the exposure parameter corresponding to the current environmental parameter from the corresponding relationship between the preset environmental parameter and the exposure parameter;

The found exposure parameter is determined as the current exposure parameter.

In the above exposure control method, the collecting multiple environmental brightness information of the scene to be photographed includes:

Using each of the multiple photosensitive units included in the environmental brightness sensing module, collect one piece of environmental brightness information of the scene to be photographed to obtain the multiple pieces of environmental brightness information.

In a second aspect, an embodiment of the present application provides an exposure control device, the device including:

The environmental brightness sensing module is configured to collect multiple environmental brightness information of the scene to be photographed;

The first determining module is configured to use the plurality of environmental brightness information to determine current environmental parameters; the current environmental parameters include current brightness weighted average and current light uniformity parameters;

The second determining module is configured to determine the current exposure parameter according to the current environmental parameter and the corresponding relationship between the preset environmental parameter and the exposure parameter;

The exposure control module is configured to perform exposure control on the image sensor according to the current exposure parameter when the image sensor collects an image of the scene to be photographed.

In the above exposure control device, the first determining module is specifically configured to use a plurality of preset weights to perform a weighted average on the plurality of environmental brightness information to obtain the current brightness weighted average; the plurality of preset weights One-to-one correspondence with the plurality of environmental brightness information; from the plurality of environmental brightness information, at least one high-brightness information and at least one low-brightness information are selected; each high-brightness information in the at least one high-brightness information Are greater than each of the low-brightness information in the at least one low-brightness information; and the current light uniformity parameter is determined according to the at least one high-brightness information and the at least one low-brightness information.

In the above exposure control device, the first determining module is specifically configured to sort the plurality of environmental brightness information according to the size to obtain a brightness information sequence; from the brightness information sequence, select the at least one high Brightness information and the at least one low brightness information.

In the above exposure control device, the first determining module is specifically configured to determine the average value of the at least one high brightness information to obtain the high brightness average value; determine the average value of the at least one low brightness information to obtain the low brightness Average value: Determine the current light uniformity parameter according to the high brightness average value and the low brightness average value.

In the above exposure control device, the second determining module is specifically configured to search for the exposure parameter corresponding to the current environmental parameter from the corresponding relationship between the preset environmental parameter and the exposure parameter; Determined as the current exposure parameter.

In the above exposure control device, the environmental brightness sensor module includes a plurality of photosensitive units,

The environmental brightness sensing module is specifically configured to use each of the multiple photosensitive units to collect one piece of environmental brightness information of the scene to be photographed to obtain the multiple pieces of environmental brightness information.

In a third aspect, an embodiment of the present application provides an exposure control device, which includes an environmental brightness sensing module composed of multiple photosensitive units, a processor, a memory, and a communication bus;

The communication bus is configured to realize the communication connection between the environmental brightness sensing module, the processor and the memory;

The processor and the environmental brightness sensing module are configured to execute an exposure control program stored in the memory to implement the above exposure control method.

In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by one or more processors, the above exposure control method is implemented.

The embodiment of the application provides an exposure control method that collects multiple environmental brightness information of a scene to be photographed; uses multiple environmental brightness information to determine current environmental parameters; current environmental parameters include current brightness weighted average and current light uniformity parameters; The current environmental parameters and the corresponding relationship between the preset environmental parameters and the exposure parameters are determined to determine the current exposure parameters; when the image sensor collects images of the scene to be shot, the image sensor is exposed to exposure control according to the current exposure parameters. The technical solution provided by this application determines the current exposure parameters for exposure control by analyzing the weighted average of brightness and light uniformity parameters of the scene to be photographed. It is not only suitable for various exposure scenes, but also effectively accelerates the automatic exposure speed in complex environments with uneven lighting. , And the exposure parameters are more reasonable and accurate, which improves the imaging effect of the image sensor.

Description of the drawings

FIG. 1 is a schematic flowchart of an exposure control method provided by an embodiment of the application;

2 is a schematic structural diagram of an exemplary environmental brightness sensing module provided by an embodiment of the application;

FIG. 3 is a schematic diagram of a process for determining current environmental parameters according to an embodiment of the application;

4 is a first structural diagram of an exposure control device provided by an embodiment of the application;

FIG. 5 is a second structural diagram of an exposure control device provided by an embodiment of the application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It can be understood that the specific embodiments described here are only used to explain the related application, but not to limit the application. In addition, it should be noted that, for ease of description, only the parts related to the relevant application are shown in the drawings.

Example one

The embodiment of the present application provides an exposure control method, which is implemented by an exposure control device. FIG. 1 is a schematic flowchart of an exposure control method provided by an embodiment of the application. As shown in Figure 1, it mainly includes the following steps:

S101. Collect multiple environmental brightness information of a scene to be photographed.

In the embodiment of the present application, the exposure control device may first collect multiple environmental brightness information of the scene to be photographed.

Specifically, in the embodiment of the present application, the exposure control device includes an environmental brightness sensing module. The environmental brightness sensing module includes a plurality of photosensitive units, and each photosensitive unit of the plurality of photosensitive units can collect one piece of environmental brightness information of the scene to be shot, so as to obtain multiple pieces of environmental brightness information of the scene to be shot.

It should be noted that, in the embodiment of the present application, the number of photosensitive units included in the environmental brightness sensing module can be designed according to actual requirements, which is not limited in the embodiment of the present application.

FIG. 2 is a schematic structural diagram of an exemplary environmental brightness sensing module provided by an embodiment of the application. As shown in FIG. 2, in the embodiment of the present application, the environmental brightness sensing module is composed of 108 photosensitive units, and the 108 photosensitive units are arranged in a 12×9 array. When the image sensor needs to be used for imaging, the exposure control device can collect 108 environmental brightness information of the scene to be photographed through the environmental brightness sensor module.

S102. Determine current environment parameters by using multiple pieces of environment brightness information; the current environment parameters include the current brightness weighted average value and the current light uniformity parameter.

In the embodiment of the present application, after the exposure control device collects multiple environmental brightness information of the scene to be photographed through the environmental brightness sensor module, it can use the multiple environmental brightness information to determine the current environmental parameters, where the current environmental parameters Including the current weighted average value of brightness and the current light uniformity parameter.

FIG. 3 is a schematic diagram of a process for determining current environmental parameters according to an embodiment of the application. As shown in FIG. 3, the exposure control device uses multiple environmental brightness information to determine the current environmental parameters, including the following steps:

S301: Perform a weighted average on a plurality of ambient brightness information using a plurality of preset weights to obtain a current weighted average value of brightness; the plurality of preset weights correspond to a plurality of ambient brightness information in a one-to-one manner.

In the embodiment of the present application, the exposure control device may use multiple corresponding preset weights to perform weighted average for multiple pieces of environmental brightness information, so as to obtain the current weighted average value of brightness.

It is understandable that, in the embodiment of the present application, multiple pieces of environmental brightness information are correspondingly collected by multiple photosensitive units that constitute the environmental brightness sensor module. For each photosensitive unit, its location is different, and the collected information is There are also certain differences in the importance of environmental brightness information. For example, the environmental brightness information collected by the photosensitive unit at the edge is less important, and the environmental brightness information collected by the photosensitive unit at the center is more important. Therefore, the user can set different weights corresponding to the environmental brightness information collected by the photosensitive units in different positions in advance. Of course, the weight of the environmental brightness information collected by different photosensitive units may also be considered based on other factors, and the specific multiple preset weights are not limited in the embodiment of the present application.

Exemplarily, in the embodiment of the present application, the environmental brightness sensing module includes three light-sensing units arranged in sequence. Among them, the environmental brightness information collected by the two light-sensing units at the edge is used in the process of exposure and imaging. The degree of importance is inferior to the environmental brightness information collected by the photosensitive unit in the center. Therefore, the preset weight can be configured to be 0.25. For the environmental brightness information collected by the photosensitive unit in the center, the preset weight is 0.5.

S302. Select at least one high-brightness information and at least one low-brightness information from the multiple environmental brightness information; each high-brightness information in the at least one high-brightness information is greater than each low-brightness information in the at least one low-brightness information .

In the embodiment of the present application, the exposure control device may select at least one high-brightness information and at least one low-brightness information from a plurality of collected environmental brightness information. Wherein, each high-brightness information in the at least one high-brightness information is larger than each low-brightness information in the at least one low-brightness information.

Specifically, in the embodiment of the present application, the exposure control device selects at least one high-brightness information and at least one low-brightness information from a plurality of environmental brightness information, including: sorting the plurality of environmental brightness information according to size to obtain Luminance information sequence; at least one high-luminance information and at least one low-luminance information are selected from the luminance information sequence.

It should be noted that in the embodiment of the present application, the exposure control device can sort a plurality of environmental brightness information from small to large. Of course, multiple environmental brightness information can also be sorted from large to small. The embodiment is not limited.

It should be noted that, in the embodiment of the present application, since the brightness information sequence is a sequence obtained by arranging a plurality of environmental brightness information in order of magnitude, the exposure control device can select at least one high value from it in a specific manner. The specific selection method of the brightness information and at least one low-brightness information is not limited in the embodiment of the present application.

Exemplarily, in the embodiment of the present application, the exposure control device collects 108 pieces of environment brightness information for the scene to be photographed through the environment brightness sensor module, so that the 108 pieces of environment brightness information can be sorted from small to large to obtain the brightness information. sequence. The exposure control device selects the 10 environment brightness information with the largest serial number from the brightness information sequence, which is actually the 10 environment brightness information with the largest brightness, and determines each environment brightness information as a high brightness information. In addition, the exposure control device selects 10 ambient brightness information with serial numbers 1-10 from the brightness information sequence, which are actually 10 ambient brightness information with lower brightness, and determines each ambient brightness information as a low brightness information. Of course, the selected 10 high-brightness information are all greater than 10 low-brightness information.

S303: Determine the current light uniformity parameter according to the at least one high-brightness information and the at least one low-brightness information.

In the embodiment of the present application, after the exposure control device selects at least one high-brightness information and at least one low-brightness information from a plurality of environmental brightness information, further, according to the at least one high-brightness information and at least one low-brightness information, Determine the current light uniformity parameters.

Specifically, in the embodiment of the present application, the exposure control device determines the current light uniformity parameter according to at least one high-brightness information and at least one low-brightness information, including: determining the average value of the at least one high-brightness information to obtain the high-brightness average value ; Determine the average value of at least one low-brightness information to obtain the low-brightness average value; determine the current light uniformity parameter according to the high-brightness average value and the low-brightness average value.

It should be noted that, in the embodiment of the present application, after the exposure control device obtains at least one high-brightness information and at least one low-brightness information, it can calculate the corresponding average values respectively to obtain the high-brightness average value and the low-brightness average value, and then , The current light uniformity parameter can be calculated according to the following formula (1):

LUX_DR=BrightVaule/DarkVaule (1)

Among them, LUX_DR is the current light uniformity parameter, BrightVaule is the high-brightness average value, and DarkVaule is the low-brightness average value.

It should be noted that, in the embodiment of the present application, the current uniformity parameter of light represents the uniformity of the light in the scene to be shot. The exposure control device can calculate the current light uniformity parameter according to the above formula (1). Of course, it can also calculate the current light uniformity parameter in other specific ways, which is not limited in the embodiment of the present application.

S103: Determine the current exposure parameter according to the current environmental parameter and the corresponding relationship between the preset environmental parameter and the exposure parameter.

In the embodiment of the present application, after the exposure control device determines the current environmental parameters, that is, the current weighted average brightness and the current light uniformity parameters, further, according to the current environmental parameters and the corresponding relationship between the preset environmental parameters and the exposure parameters, Determine the current exposure parameters.

Specifically, in the embodiment of the present application, the exposure control device determines the current exposure parameter according to the current environmental parameter and the corresponding relationship between the preset environmental parameter and the exposure parameter, including: from the corresponding relationship between the preset environmental parameter and the exposure parameter To find the exposure parameter corresponding to the current environment parameter; determine the found exposure parameter as the current exposure parameter.

It should be noted that, in the embodiment of the present application, first, similar to the above step S101, in a certain environment, multiple environmental brightness information is collected through the environmental brightness sensor module, and the multiple environmental brightness information is used to determine the corresponding Environmental parameters, that is, the weighted average of brightness and light uniformity parameters in the environment. After that, the user manually adjusts the exposure control of the image sensor until the brightness of the captured image reaches the target brightness, so as to record the exposure parameters when the target brightness is reached, and establish the Correspondence between exposure parameters and brightness weighted average and light uniformity parameters. For each environment, the corresponding relationship can be determined in the above manner, so that the corresponding relationship under various environments is finally established, and the corresponding relationship between the preset environmental parameters and the exposure parameters is obtained. The specific corresponding relationship is not limited in the embodiment of this application. .

It should be noted that in the embodiment of the present application, the correspondence between the preset environmental parameters and the exposure parameters can be stored in the exposure control device in the form of a mapping table. Of course, it can also be stored in other forms. Not limited.

Exemplarily, in the embodiment of the present application, the corresponding relationship between the preset environmental parameters and the exposure parameters may be the exposure calibration table shown in Table 1:

Table 1

Among them, LUX_DR is the current light uniformity parameter, LUX is the current brightness weighted average value, and each brightness weighted average value and a light uniformity parameter has a corresponding exposure parameter Exp. After the exposure control device determines the current environmental parameters, that is, the current weighted average value of brightness and the current light uniformity parameter, it can search for the corresponding exposure parameter in Table 1, and determine the found exposure parameter as the current exposure parameter.

It should be noted that, in the embodiment of the present application, the exposure parameter may be an exposure-related parameter such as an exposure duration. The specific exposure parameters are not limited in the embodiment of this application.

S104: When the image sensor collects an image of the scene to be shot, perform exposure control on the image sensor according to the current exposure parameter.

In the embodiment of the present application, after determining the current exposure parameter, the exposure control device can perform exposure control on the image sensor according to the current exposure parameter when the image sensor collects the image of the scene to be shot.

It should be noted that, in the embodiment of the present application, after determining the current exposure parameter, the exposure control device may use the current exposure parameter as the exposure setting of the image sensor, so that when the image sensor is imaging the scene to be shot, it is based on the current The exposure parameter controls the exposure of the image sensor.

It is understandable that, in the embodiment of the present application, the environment brightness sensor module is introduced to obtain multiple pieces of environment brightness information, and the multiple pieces of environment brightness information are used to analyze the brightness and light distribution uniformity of the environment, thereby quickly starting from the preset In the corresponding relationship between environmental parameters and exposure parameters, the corresponding exposure parameters are found for exposure control. Compared with relying on the current exposure setting and the brightness information collected, to evaluate the current environmental brightness and further determine the next exposure setting, or to obtain only the environmental brightness to evaluate the exposure parameters, it can be applied to various solutions. This kind of exposure scene effectively accelerates the automatic exposure speed of the complex environment with uneven illumination, and the exposure parameters are more reasonable and accurate, which improves the imaging effect of the image sensor.

Example two

The embodiment of the present application provides an exposure control device. FIG. 4 is a first structural diagram of an exposure control device provided by an embodiment of the application. As shown in Figure 4, the device includes:

The environmental brightness sensing module 401 is configured to collect multiple environmental brightness information of the scene to be photographed;

The first determining module 402 is configured to use the multiple environmental brightness information to determine current environmental parameters; the current environmental parameters include current brightness weighted average and current light uniformity parameters;

The second determining module 403 is configured to determine the current exposure parameter according to the current environmental parameter and the corresponding relationship between the preset environmental parameter and the exposure parameter;

The exposure control module 404 is configured to perform exposure control on the image sensor according to the current exposure parameter when the image sensor collects an image of the scene to be photographed.

Optionally, the first determining module 402 is specifically configured to use a plurality of preset weights to perform a weighted average of the plurality of environmental brightness information to obtain the current brightness weighted average; The plurality of environmental brightness information corresponds to each other; from the plurality of environmental brightness information, at least one high-brightness information and at least one low-brightness information are selected; each high-brightness information in the at least one high-brightness information is greater than Each piece of low-brightness information in the at least one piece of low-brightness information; determining the current light uniformity parameter according to the at least one piece of high-brightness information and the at least one low-brightness information.

Optionally, the first determining module 402 is specifically configured to sort the plurality of ambient brightness information according to their size to obtain a brightness information sequence; from the brightness information sequence, select the at least one high-brightness information And the at least one low-brightness information.

Optionally, the first determining module 402 is specifically configured to determine an average value of the at least one high-brightness information to obtain a high-brightness average value; determine the average value of the at least one low-brightness information to obtain a low-brightness average value ; According to the high-brightness average value and the low-brightness average value, determine the current light uniformity parameter.

Optionally, the second determining module 403 is specifically configured to search for the exposure parameter corresponding to the current environmental parameter from the corresponding relationship between the preset environmental parameter and the exposure parameter; and determine the found exposure parameter as The current exposure parameter.

Optionally, the environmental brightness sensing module 401 includes a plurality of photosensitive units,

The environmental brightness sensing module 401 is specifically configured to use each of the multiple photosensitive units to collect one piece of environmental brightness information of the scene to be photographed to obtain the multiple pieces of environmental brightness information.

FIG. 5 is a second structural diagram of an exposure control device provided by an embodiment of the application. As shown in FIG. 5, the device includes an environmental brightness sensing module 501 composed of multiple photosensitive units, a processor 502, a memory 503, and a communication bus 504;

The communication bus 504 is configured to implement a communication connection between the environmental brightness sensing module 501, the processor 502, and the memory 503;

The processor 502 and the environmental brightness sensing module 501 are configured to execute the exposure control program stored in the memory 503 to implement the above exposure control method.

It should be noted that, in the embodiment of the present application, the environmental brightness sensing modules shown in FIG. 4 and FIG. 5 are the same modules, and both are configured to collect multiple environmental brightness information.

The embodiment of the application provides an exposure control device that collects multiple environmental brightness information of a scene to be photographed; uses multiple environmental brightness information to determine current environmental parameters; current environmental parameters include current brightness weighted average and current light uniformity parameters; The current environmental parameters and the corresponding relationship between the preset environmental parameters and the exposure parameters are determined to determine the current exposure parameters; when the image sensor collects images of the scene to be shot, the image sensor is exposed to exposure control according to the current exposure parameters. The exposure control device provided by this application determines the current exposure parameters for exposure control by analyzing the weighted average of brightness and light uniformity parameters of the scene to be photographed. It is not only suitable for various exposure scenes, but also effectively accelerates automatic exposure in complex environments with uneven lighting. Speed and exposure parameters are more reasonable and accurate, which improves the imaging effect of the image sensor.

The embodiment of the present application provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by one or more processors, the above exposure control method is implemented. The computer-readable storage medium may be a volatile memory (volatile memory), such as a random-access memory (Random-Access Memory, RAM); or a non-volatile memory (non-volatile memory), such as a read-only memory (Read-only memory). Only Memory, ROM, flash memory, Hard Disk Drive (HDD) or Solid-State Drive (SSD); it can also be a respective device including one or any combination of the above-mentioned memories, such as Mobile phones, computers, tablet devices, personal digital assistants, etc.

Those skilled in the art should understand that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, this application may adopt the form of hardware embodiment, software embodiment, or a combination of software and hardware embodiments. Moreover, this application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, optical storage, etc.) containing computer-usable program codes.

This application is described with reference to the schematic diagrams and/or block diagrams of the implementation process of the methods, equipment (systems), and computer program products according to the embodiments of the application. It should be understood that each process and/or block in the schematic flow diagram and/or block diagram can be realized by computer program instructions, and a combination of processes and/or blocks in the schematic flow diagram and/or block diagram can be realized. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing equipment to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing equipment are generated A device for implementing functions specified in one process or multiple processes in the schematic flow chart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device. The device realizes the functions specified in one or more processes in the schematic diagram and/or one block or more in the block diagram.

These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment. The instructions provide steps for implementing functions specified in one or more processes in the schematic diagram and/or one block or more in the block diagram.

The above are only specific implementations of this application, but the scope of protection of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application. , Should be covered in the scope of protection of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

An exposure control method, the method includes:

Collect multiple environmental brightness information of the scene to be photographed;

Determine current environmental parameters by using the multiple environmental brightness information; the current environmental parameters include current brightness weighted average and current light uniformity parameters;

Determine the current exposure parameter according to the current environmental parameter and the corresponding relationship between the preset environmental parameter and the exposure parameter;

When the image sensor collects the image of the scene to be shot, the image sensor is exposed to exposure control according to the current exposure parameter.
The method according to claim 1, wherein said determining the current environmental parameters by using the plurality of environmental brightness information comprises:

Performing a weighted average on the plurality of environmental brightness information by using a plurality of preset weights to obtain the weighted average value of the current brightness; the plurality of preset weights are in a one-to-one correspondence with the plurality of environmental brightness information;

At least one high-brightness information and at least one low-brightness information are selected from the plurality of environmental brightness information; each high-brightness information in the at least one high-brightness information is larger than each of the at least one low-brightness information. A low-brightness message;

The current light uniformity parameter is determined according to the at least one high-brightness information and the at least one low-brightness information.
The method according to claim 2, wherein the selecting at least one high-brightness information and at least one low-brightness information from the plurality of environmental brightness information comprises:

Sorting the plurality of environmental brightness information according to size to obtain a brightness information sequence;

From the brightness information sequence, the at least one high-brightness information and the at least one low-brightness information are selected.
The method according to claim 2, wherein the determining the current light uniformity parameter according to the at least one high-brightness information and the at least one low-brightness information comprises:

Determining an average value of the at least one high-brightness information to obtain a high-brightness average value;

Determining an average value of the at least one low-luminance information to obtain a low-luminance average value;

The current light uniformity parameter is determined according to the high-brightness average value and the low-brightness average value.
The method according to claim 1, wherein the determining the current exposure parameter according to the current environment parameter and the corresponding relationship between the preset environment parameter and the exposure parameter comprises:

Searching for the exposure parameter corresponding to the current environmental parameter from the corresponding relationship between the preset environmental parameter and the exposure parameter;

The found exposure parameter is determined as the current exposure parameter.
The method according to claim 1, wherein the collecting multiple environmental brightness information of the scene to be photographed comprises:

Using each of the multiple photosensitive units included in the environmental brightness sensing module, collect one piece of environmental brightness information of the scene to be photographed to obtain the multiple pieces of environmental brightness information.
An exposure control device, the device comprising:

The environmental brightness sensing module is configured to collect multiple environmental brightness information of the scene to be photographed;

The first determining module is configured to use the plurality of environmental brightness information to determine current environmental parameters; the current environmental parameters include current brightness weighted average and current light uniformity parameters;

The second determining module is configured to determine the current exposure parameter according to the current environmental parameter and the corresponding relationship between the preset environmental parameter and the exposure parameter;

The exposure control module is configured to perform exposure control on the image sensor according to the current exposure parameter when the image sensor collects an image of the scene to be photographed.
The exposure control device according to claim 7, wherein:

The first determining module is specifically configured to use a plurality of preset weights to perform a weighted average on the plurality of environmental brightness information to obtain the current brightness weighted average; the plurality of preset weights and the plurality of environmental brightness Information one-to-one correspondence; from the plurality of environmental brightness information, at least one high-brightness information and at least one low-brightness information are selected; each high-brightness information in the at least one high-brightness information is greater than the at least one low-brightness information Each piece of low-brightness information in the brightness information; determining the current light uniformity parameter according to the at least one high-brightness information and the at least one low-brightness information.
The exposure control device according to claim 8, wherein:

The first determining module is specifically configured to sort the plurality of environmental brightness information according to their size to obtain a brightness information sequence; from the brightness information sequence, select the at least one high-brightness information and the at least one Low brightness information.
The exposure control device according to claim 8, wherein:

The first determining module is specifically configured to determine an average value of the at least one high-brightness information to obtain a high-brightness average value; determine the average value of the at least one low-brightness information to obtain a low-brightness average value; The brightness average value and the low brightness average value determine the current light uniformity parameter.
The exposure control device according to claim 7, wherein:

The second determining module is specifically configured to search for an exposure parameter corresponding to the current environmental parameter from the corresponding relationship between the preset environmental parameter and the exposure parameter; and determine the found exposure parameter as the current exposure parameter .
The exposure control device according to claim 7, wherein the environmental brightness sensing module includes a plurality of photosensitive units,

The environmental brightness sensing module is specifically configured to use each of the multiple photosensitive units to collect one piece of environmental brightness information of the scene to be photographed to obtain the multiple pieces of environmental brightness information.
An exposure control device, which includes an environmental brightness sensor module composed of a plurality of photosensitive units, a processor, a memory, and a communication bus;

The communication bus is configured to realize the communication connection between the environmental brightness sensing module, the processor and the memory;

The processor and the environmental brightness sensing module are configured to execute the exposure control program stored in the memory to realize the exposure control method according to any one of claims 1-6.
A computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by one or more processors, the exposure control method according to any one of claims 1 to 6 is realized.