WO2022088882A1 - Photographing method and apparatus, and terminal, and computer readable storage medium - Google Patents

Abstract

A photographing method and apparatus, and a terminal, and a computer readable storage medium. The photographing method comprises: obtaining a first sample image according to a current first focus value (S110); when detecting that the first sample image comprises a moiré pattern, determining a second focus value according to the first focus value and a preset mapping relationship, the second focus value being greater than the first focus value (S120); and when detecting a photographing instruction, executing photography according to the second focus value (S130).

Description

Shooting method, device, terminal and computer-readable storage medium

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based on the Chinese patent application with the application number of 202011185838.4 and the filing date of October 30, 2020, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is incorporated herein by reference.

technical field

The present application relates to, but is not limited to, the field of terminal technologies, and in particular, relates to a photographing method, device, terminal, and computer-readable storage medium.

Background technique

With the development of shooting technology and terminal industry, the shooting function of terminal is more and more favored by people, and there are a wide range of application scenarios in daily life. However, when objects such as screens or clothes are photographed through the terminal, the resulting image usually has moiré patterns, which affects the image quality. There are two main forms of common moiré patterns. One is that the camera of the terminal uses photosensitive elements such as charge-coupled device (CCD) and complementary metal oxide semiconductor (CMOS). The spatial frequency of the element is close to the spatial frequency of the object to be photographed, and the incoming light will have a beat effect on the photosensitive element, forming a high-frequency red and green moiré pattern in the formed image; the other is the result of shooting. The image resolution is high and contains too much image information, resulting in moiré patterns of gray and black. In order to eliminate the moiré, the existing method mainly adopts an image processing technology. Although the moiré can be eliminated, the image processing takes a certain amount of time, which affects the user experience.

SUMMARY OF THE INVENTION

The following is an overview of the topics detailed in this article. This summary is not intended to limit the scope of protection of the claims.

Embodiments of the present application provide a photographing method, apparatus, terminal, and computer-readable storage medium.

In a first aspect, an embodiment of the present application provides a shooting method, which is applied to a terminal, including: acquiring a first sample image according to a current first focus value; and when detecting that the first sample image contains moiré, A second focus value is determined according to the first focus value and a preset mapping relationship, and the second focus value is greater than the first focus value; when a shooting instruction is detected, shooting is performed according to the second focus value.

In a second aspect, an embodiment of the present application further provides a photographing device, including: a first focus value acquisition unit, configured to acquire a first sample image according to a current first focus value; a second focus value acquisition unit, set to It is set so that when it is detected that the first sample image contains moiré, a second focus value is determined according to the first focus value and a preset mapping relationship, and the second focus value is greater than the first focus value a photographing unit configured to perform photographing according to the second focus value when a photographing instruction is detected.

In a third aspect, an embodiment of the present application further provides a terminal, including: a memory, a processor, and a computer program stored in the memory and running on the processor, the processor implementing the computer program as described in Section 3 when the processor executes the computer program. The shooting method described in one aspect.

In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium storing computer-executable instructions, where the computer-executable instructions are used to execute the shooting method according to the first aspect.

Other features and advantages of the present application will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the present application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the description, claims and drawings.

Description of drawings

The accompanying drawings are used to provide a further understanding of the technical solutions of the present application, and constitute a part of the specification. They are used to explain the technical solutions of the present application together with the embodiments of the present application, and do not constitute a limitation on the technical solutions of the present application.

FIG. 1 is a flowchart of a shooting method applied to a terminal provided by an embodiment of the present application;

2 is a flowchart of determining moiré according to image registration in a shooting method provided by another embodiment of the present application;

3 is a flowchart of determining moiré patterns according to sub-pixels in a shooting method provided by another embodiment of the present application;

4 is a flowchart of determining a second focus value according to a mapping relationship in a shooting method provided by another embodiment of the present application;

5 is a schematic diagram of a mapping relationship provided by another embodiment of the present application;

6 is a flowchart of cleaning a sample image in a shooting method provided by another embodiment of the present application;

7 is a schematic structural diagram of a photographing device provided by another embodiment of the present application;

FIG. 8 is a schematic structural diagram of a terminal for executing a photographing method provided by another embodiment of the present application.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present application more clearly understood, the present application will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application.

It should be noted that although the functional modules are divided in the schematic diagram of the device, and the logical sequence is shown in the flowchart, in some cases, the modules may be divided differently from the device, or executed in the order in the flowchart. steps shown or described. The terms "first", "second", "third", etc. in the description, claims or the above drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

It should be noted that the terminal may be in any type of product form, such as a common mobile phone, tablet computer, handheld device, smart wearable device, etc. The embodiments of the present application do not limit the specific form of the terminal too much.

The present application provides a photographing method, device, terminal and computer-readable storage medium. The photographing method includes: acquiring a first sample image according to a current first focus value; when it is detected that the first sample image contains moiré , determining a second focus value according to the first focus value and a preset mapping relationship, and the second focus value is greater than the first focus value; when a shooting instruction is detected, shooting is performed according to the second focus value. According to the solutions provided by the embodiments of the present application, the focal length can be further increased when it is detected that the first sample image contains moiré, so that the ingested light is more dispersed, and the beat effect of the light is reduced. The increase will make the image blur to a certain extent, reduce the image information, eliminate the moiré pattern during the shooting process, and improve the user experience.

The embodiments of the present application will be further described below with reference to the accompanying drawings.

As shown in FIG. 1 , FIG. 1 is a flowchart of a photographing method provided by an embodiment of the present application. The photographing method includes but is not limited to step S110 , step S120 and step S130 .

Step S110, acquiring a first sample image according to the current first focus value.

In one embodiment, the first focus value may be the focus value after the shooting function of the terminal is activated and the shooting parameters are automatically adjusted. After the shooting function of the terminal is activated, the terminal will adjust the camera or the off-screen camera according to the clarity of the preview image. The shooting parameters of the device, such as automatic adjustment of the focal length, so that the preview image can meet a certain definition requirement, the specific adjustment method is not an improvement made by this embodiment, and will not be repeated here. It should be noted that, by the above method, the specific value of the first focus value can be directly determined, or the percentage used to adjust the focus distance can be obtained, and the first focus value can be obtained by multiplying the percentage by the automatically adjusted focus value. The specific determination method may be selected according to actual requirements, which is not limited in this embodiment.

In one embodiment, the first sample image may be an image obtained by shooting, or may be a real-time image in a viewfinder of the terminal, and a specific obtaining method may be selected according to actual requirements.

Step S120, when it is detected that the first sample image contains moiré, a second focus value is determined according to the first focus value and a preset mapping relationship, and the second focus value is greater than the first focus value.

In one embodiment, any method may be used to determine that the first sample image contains moiré, which is not limited in this embodiment. It can be understood that, since there are two types of common moiré patterns, and the reasons for their formation are different from each other, after it is determined that the first sample image contains moiré patterns, the types of moiré patterns can be further determined. For example, it is determined according to the color of the moiré pattern, and this embodiment does not limit the specific determination method.

In an embodiment, the mapping relationship may be in any common form, such as a common table, a corresponding relationship, etc., which is not limited in this embodiment, and the second focus value can be determined according to the first focus value and the mapping relationship, that is, Can. Those skilled in the art can understand that, by setting the adjusted mapping relationship, the sharpness of the image obtained according to the second focus value can meet the requirements. For example, since the value range of the first focus value is known, when the mapping When the relationship is the focusing coefficient, the specific value of the focusing coefficient can be preset, so that the value of the second focusing value can fall within a certain value range, so as to meet the needs of image clarity and avoid excessive focus adjustment. cause out of focus.

It should be noted that the larger the focal length, the lower the degree of convergence of the incoming light. Therefore, adjusting the first focus value to the second focus value with a larger value can effectively reduce the beat effect of light, thereby avoiding the formation of high The frequency of red and green moiré; and, after the focal length is increased, the imaged image is blurred than before the focus is adjusted, so that the image information is less, so as to avoid the gray and black moiré caused by too rich image information.

Step S130, when a shooting instruction is detected, shooting is performed according to the second focus value.

It should be noted that the purpose of shooting with the second focus value is to eliminate the moiré in the image. Therefore, the shooting can be performed using the second focus value when it is detected that the image contains moiré, or it can be set in the terminal. In a specific shooting mode, there is no need to detect moiré in this shooting mode, and shooting is directly performed according to the second focus value, for example, it may be a screen shooting mode for shooting a screen.

It should be noted that in the actual use process, after the shooting function of the terminal is activated, it may not be used for shooting immediately. Therefore, in order to improve the shooting efficiency, after entering the shooting function, the real-time focus value of the preview interface can be used as the first focus value. A focus value is determined, and a second focus value is determined in real time or periodically according to the first focus value, so that the second focus value can be directly applied to shoot after the shooting instruction is obtained.

In one embodiment, the shooting instruction can be generated in any way, for example, the user clicks the shooting button on the shooting interface of the terminal, or, for a terminal that supports voice control, the shooting instruction can be recognized from the voice instruction input by the user. The speech recognition method described above is not an improvement made by this embodiment, and will not be repeated here.

In addition, referring to FIG. 2, in an embodiment, step 120 in the embodiment shown in FIG. 1 further includes but is not limited to the following steps:

Step S210, obtaining a preset adjustment value, and determining a third focus value according to the first focus value and the adjustment value;

Step S220, acquiring a second sample image according to the third focus value;

Step S230, performing image registration on the first sample image and the second sample image, and when detecting that there is a periodic color shift between the pixel information of the first sample image and the pixel information of the second sample image, determine the first sample image Contains moiré.

In one embodiment, the adjustment value may be a specific numerical value, the first focus value and the adjustment value are added to obtain the third focus value, or it may be an adjustment coefficient, and the first focus value and the adjustment value are multiplied to obtain the third focus value. The value can be selected according to actual needs.

In one embodiment, the first sample image and the second sample image may be acquired at the same time, or may be acquired in the order of the first sample image and the second sample image, for example, for a camera with at least two cameras The terminal may determine the focal length of the first camera by using the first focus value, respectively, and determine the focal length of the second camera according to the third focus value. The first camera and the second camera acquire images simultaneously, and the first camera acquires the first image. In this image, the second sample image is obtained by the second camera, and the method of obtaining the sample image by two cameras at the same time can ensure the same content of the images and improve the efficiency of image comparison; for another example, through one of the cameras of the terminal, according to the first After acquiring the first sample image, the focus value determines the third focus value, and then sets the focal length of the camera according to the third focus value to acquire the second sample image. In this case, since the actual object may change, For example, the content of the screen may change when the screen is captured, so the first sample image and the second sample image need to be registered and compared.

It should be noted that the specific registration method may adopt a known method, and the present application does not involve the improvement of the specific registration method, as long as the first sample image and the second sample image can be used for the comparison of pixel information. It can be understood that a color shift pixel number threshold can also be set for the determination of moiré, for example, it is detected that the pixel information of the first sample image and the pixel information of the second sample image have periodic color shift, and there is a color shift. If the offset pixels are continuous pixels and satisfy the threshold of the number of color offset pixels, it can be determined that the first sample image contains moiré, or other determination criteria can be used according to actual needs, which are not limited here.

In addition, referring to FIG. 3 , in an embodiment, step 120 in the embodiment shown in FIG. 1 further includes but is not limited to the following steps:

Step S310, when it is detected that at least one pixel of the first sample image includes several sub-pixels, it is determined that the first sample image includes moiré.

In one embodiment, a sub-pixel threshold can also be set, and when the number of sub-pixels contained in a pixel is greater than or equal to the sub-pixel threshold, the pixel is determined to be a part of the moiré pattern, and the specific sub-pixel threshold can be based on actual conditions. Demand adjustment will not be repeated here.

In addition, referring to FIG. 4 , in an embodiment, step 120 in the embodiment shown in FIG. 1 further includes but is not limited to the following steps:

Step S410, determining a focusing coefficient according to the first focusing value and the mapping relationship;

Step S420, determining a second focus value according to the first focus value and the focus adjustment coefficient.

Below in conjunction with Table 1, the technical solution of this embodiment is illustrated by an example.

serial number	The range of the first focus value	The range of the focusing factor
1	[0%, 1%)	Set to fixed value: 20%
2	[1%, 5%)	[20,5)
3	[5%, 10%)	[5,3)
4	[10%, 25%)	[3,3.2)

5	[25%, 50%)	[3.2, 1.2)
6	[50%, 100%]	[1.2,1]

Table 1. Example table of mapping relationships

Referring to Table 1, it should be noted that Table 1 is obtained from the mapping relationship curve shown in FIG. 5 . FIG. 5 is only an exemplary curve of the present embodiment, and does not limit specific values. Those skilled in the art are motivated to base the actual The specific mapping relationship needs to be selected, which will not be repeated here.

The first focus value and the third focus value are in the form of percentages, that is, the focal length when the camera is started is used as the reference focal length, and the reference focal length multiplied by the first focus value is the actual focal length value.

In an embodiment, when the first focus value is less than 1%, in order to ensure that the focal length is large enough, the second focus value is determined to be 20% by the focus adjustment coefficient. For another example, when the first focus value is 5%, then It can be determined that the focusing coefficient is 5, and the second focusing value is 25%, that is, the focusing coefficient is the magnification of the first focusing value, and other examples will not be repeated. It should be noted that, as shown in Table 1, when the first focus value is 100%, the focal length can no longer be enlarged. At this time, the focus adjustment coefficient is determined to be 1, and the second focus value can be determined to be 100%.

In addition, referring to FIG. 6 , in an embodiment, the first sample image and the second sample image are stored in the file storage or the system memory. After step 130 in the embodiment shown in FIG. The following steps:

Step S610, delete the first sample image and the second sample image from the file storage;

or,

Step S620, releasing the first sample image and the second sample image from the system memory.

It should be noted that the file storage may be a physical storage device such as the storage of the terminal or a memory card, and the specific storage location may be adjusted according to actual needs, which is not limited in this embodiment.

It can be understood that after the shooting function is activated, a memory application will be made, and the terminal allocates a certain system memory for the shooting function according to requirements. The first sample image and the second sample image can be saved in the allocated system memory. The specific memory allocation method is not an improvement made by this embodiment, and will not be repeated here.

It is worth noting that since the first sample image and the second sample image are mainly used to assist in determining the moiré pattern, after the moiré pattern is determined and photographed with the second focus value, the first sample image and the second sample image are not For other purposes, therefore, in order to save system space, the first sample image and the second sample image acquired in response to this shooting instruction may be deleted. It should be noted that when the first sample image and the second sample image are stored in the file storage, they can be deleted from the file storage by physical deletion. The specific deletion method is not an improvement made in this embodiment, and will not be repeated here. . It can be understood that when the first sample image and the second sample image are stored in the system memory, the system memory allocated to the shooting function can be released after the shooting is completed, so as to realize the synchronization of the first sample image and the second sample image. delete.

In addition, referring to FIG. 7 , an embodiment of the present application further provides a photographing device 700, the photographing device 700 includes but is not limited to a first focus value obtaining unit 710, a second focus value obtaining unit 720, and a photographing unit 730, in,

The first focus value obtaining unit 710 is configured to obtain a first sample image according to the current first focus value when a shooting instruction is detected;

The second focus value acquiring unit 720 is configured to determine a second focus value according to the first focus value and a preset mapping relationship when it is detected that the first sample image contains moiré, and the second focus value is greater than the first focus value ;

The photographing unit 730 is configured to perform photographing according to the second focus value.

It should be noted that the operations performed by the first focus value obtaining unit 710 may refer to step S110 shown in FIG. 1 , and similarly, the operations performed by the second focus value obtaining unit 720 may refer to the steps shown in FIG. 1 . S120 , the operations performed by the photographing unit 730 may refer to step S130 shown in FIG. 1 , which will not be repeated here.

In addition, referring to FIG. 7 , in one embodiment, the second focus value obtaining unit 720 in FIG. 7 further includes, but is not limited to, the following units:

The third focus value obtaining unit 721 is configured to take a preset adjustment value, and determine the third focus value according to the first focus value and the adjustment value;

The second sample image obtaining unit 722 is configured to obtain the second sample image according to the third focus value;

The first moiré detection unit 723 is configured to perform image registration on the first sample image and the second sample image. When detecting that the pixel information of the first sample image and the pixel information of the second sample image have periodic colors, partial, it is determined that moiré is contained in the first sample image.

It should be noted that the operations performed by the third focus value obtaining unit 721 may refer to step S2310 shown in FIG. 2 , and similarly, the operations performed by the second sample image obtaining unit 722 may refer to the steps shown in FIG. 2 . S220, the operations performed by the first moiré detection unit 723 may refer to step S230 shown in FIG. 2, and details are not repeated here.

In addition, referring to FIG. 7 , in one embodiment, the second focus value obtaining unit 720 in FIG. 7 further includes, but is not limited to, the following units:

The second moiré detection unit 724 is configured to determine that the first sample image contains moiré when it is detected that at least one pixel of the first sample image contains several sub-pixels.

It should be noted that, for the operations performed by the second moiré detection unit 724, reference may be made to step S310 shown in FIG. 3 , and details are not described herein again.

In addition, referring to FIG. 7 , in one embodiment, the second focus value obtaining unit 720 in FIG. 7 further includes, but is not limited to, the following units:

The focusing coefficient determining unit 725 is configured to determine the focusing coefficient according to the first focusing value and the mapping relationship;

The focusing coefficient applying unit 726 is configured to determine the second focusing value according to the first focusing value and the focusing coefficient.

It should be noted that the operation performed by the focusing coefficient determining unit 725 may refer to step S410 shown in FIG. 4 , and similarly, the operation performed by the focusing coefficient applying unit 726 may refer to step S420 shown in FIG. 4 , It is not repeated here.

In addition, referring to FIG. 7 , in one embodiment, the photographing unit 730 in FIG. 7 further includes, but is not limited to, the following units:

a first cleaning unit 731, configured to delete the first sample image and the second sample image from the file storage;

The second cleaning unit 732 is configured to release the first sample image and the second sample image from the system memory.

It should be noted that the operations performed by the first cleaning unit 731 may refer to step S510 shown in FIG. 5 , and similarly, the operations performed by the second cleaning unit 732 may refer to step S520 shown in FIG. 5 . No longer.

In addition, referring to FIG. 8 , an embodiment of the present application further provides a terminal 800 . The terminal 800 includes: a memory 810 , a processor 820 , and a computer program stored in the memory 810 and running on the processor 820 .

The processor 820 and the memory 810 may be connected by a bus or otherwise.

The non-transitory software programs and instructions required to realize the shooting method of the above embodiment are stored in the memory 810, and when executed by the processor 820, the shooting method applied to the terminal 800 in the above embodiment is executed, for example, the above description is performed. The method steps S110 to S130 in Fig. 1, the method steps S210 to S230 in Fig. 2, the method step S310 in Fig. 3, the method steps S410 to S420 in Fig. 4, the method steps S610 and S620 in Fig. 6 .

The apparatus embodiments described above are only illustrative, and the units described as separate components may or may not be physically separated, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, an embodiment of the present application also provides a computer-readable storage medium, where the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are executed by a processor or controller, for example, by the above-mentioned Executed by a processor in the terminal embodiment, the above-mentioned processor can execute the shooting method applied to the terminal in the above-mentioned embodiment, for example, the above-described method steps S110 to S130 in FIG. 1 and the method steps in FIG. 2 are executed. S210 to S230, method step S310 in FIG. 3 , method step S410 to S420 in FIG. 4 , method step S610 and step S620 in FIG. 6 . Those of ordinary skill in the art can understand that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and appropriate combinations thereof. Some or all physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit . Such software may be distributed on computer-readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). As is known to those of ordinary skill in the art, the term computer storage media includes both volatile and nonvolatile implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data flexible, removable and non-removable media. Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cartridges, magnetic tape, magnetic disk storage or other magnetic storage devices, or may Any other medium used to store desired information and which can be accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and can include any information delivery media, as is well known to those of ordinary skill in the art .

The embodiments of the present application include: acquiring a first sample image according to a current first focus value; when detecting that the first sample image contains moiré, determining a second focus value according to the first focus value and a preset mapping relationship , the second focus value is greater than the first focus value; when a shooting instruction is detected, shooting is performed according to the second focus value. According to the solutions provided by the embodiments of the present application, the focal length can be further increased when it is detected that the first sample image contains moiré, so that the ingested light is more dispersed, and the beat effect of the light is reduced. The increase will make the image blur to a certain extent, reduce the image information, eliminate the moiré pattern during the shooting process, and improve the user experience.

The above is a specific description of some implementations of the application, but the application is not limited to the above-mentioned embodiments. Those skilled in the art can make various equivalent modifications or replacements without departing from the scope of the application. These equivalents Variations or substitutions of the above are all included within the scope defined by the claims of the present application.

Claims (12)

1. A shooting method, applied to a terminal, includes:

   obtaining a first sample image according to the current first focus value;

   When it is detected that the first sample image contains moiré, a second focus value is determined according to the first focus value and a preset mapping relationship, and the second focus value is greater than the first focus value;

   When a shooting instruction is detected, shooting is performed according to the second focus value.
2. A photographing method according to claim 1, wherein when it is detected that the first sample image contains moiré patterns, the method comprises:

   obtaining a preset adjustment value, and determining the third focus value according to the first focus value and the adjustment value;

   acquiring a second sample image according to the third focus value;

   Perform image registration on the first sample image and the second sample image, and when it is detected that there is a periodic color shift between the pixel information of the first sample image and the pixel information of the second sample image, determine The first sample image contains moiré.
3. A photographing method according to claim 1, wherein the determining that the first sample image contains moiré patterns comprises:

   When it is detected that at least one pixel of the first sample image contains several sub-pixels, it is determined that the first sample image contains moiré.
4. A shooting method according to claim 1, wherein the determining the second focus value according to the first focus value and a preset mapping relationship comprises:

   determining a focusing coefficient according to the first focusing value and the mapping relationship;

   The second focus value is determined according to the first focus value and the focus adjustment coefficient.
5. A photographing method according to claim 2, wherein the first sample image and the second sample image are saved in a file memory or a system memory, and after the photographing is performed according to the second focus value, Also includes:

   deleting the first sample image and the second sample image from the file storage;

   or,

   Freeing the first sample image and the second sample image from the system memory.
6. A photographing device, comprising:

   a first focus value obtaining unit, configured to obtain a first sample image according to the current first focus value;

   A second focus value acquiring unit, configured to determine a second focus value according to the first focus value and a preset mapping relationship when it is detected that the first sample image contains moiré, the second focus value value is greater than the first focus value;

   The photographing unit, when a photographing instruction is detected, is configured to perform photographing according to the second focus value.
7. A photographing device according to claim 6, further comprising:

   a third focus value acquiring unit, configured to acquire a preset adjustment value, and determine the third focus value according to the first focus value and the adjustment value;

   A second sample image acquisition unit configured to acquire a second sample image according to the third focus value;

   a first moiré detection unit, configured to perform image registration on the first sample image and the second sample image, when pixel information of the first sample image and the second sample image are detected There is a periodic color shift in the pixel information of , and it is determined that the first sample image contains moiré.
8. A photographing device according to claim 6, further comprising:

   The second moiré detection unit is configured to determine that the first sample image contains moiré when it is detected that at least one pixel of the first sample image contains several sub-pixels.
9. A photographing device according to claim 6, further comprising:

   a focusing coefficient determination unit, configured to determine the focusing coefficient according to the first focus value and the mapping relationship;

   A focusing coefficient applying unit, configured to determine the second focusing value according to the first focusing value and the focusing coefficient.
10. A photographing device according to claim 7, further comprising:

    a first cleaning unit configured to delete the first sample image and the second sample image from the file storage;

    A second cleaning unit configured to release the first sample image and the second sample image from the system memory.
11. A terminal, comprising: a memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor implements any one of claims 1 to 5 when the processor executes the computer program. the shooting method described.
12. A computer-readable storage medium storing computer-executable instructions, where the computer-executable instructions are used to execute the photographing method according to any one of claims 1 to 5.

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