WO2017045558A1

WO2017045558A1 - Depth-of-field adjustment method and apparatus, and terminal

Info

Publication number: WO2017045558A1
Application number: PCT/CN2016/098319
Authority: WO
Inventors: 张圣杰
Original assignee: 努比亚技术有限公司
Priority date: 2015-09-15
Filing date: 2016-09-07
Publication date: 2017-03-23
Also published as: CN105187722A; CN105187722B

Abstract

A depth-of-field adjustment method and apparatus, and a terminal. The method comprises: focusing a target object, collecting a basic picture, and calculating a current depth-of-field range; if the current depth-of-field range is inconsistent with a preset depth-of-field range, focusing in a front depth-of-field direction and/or back depth-of-field direction of the target object, and collecting a plurality of pictures; and superposing the plurality of collected pictures, replacing an out-of-focus part with an in-focus part or replacing an in-focus part with an out-of-focus part, and obtaining a picture within the preset depth-of-field range.

Description

Depth of field adjustment method, device and terminal

Technical field

Embodiments of the present invention relate to, but are not limited to, the field of image capturing, and more particularly, to a depth of field adjustment method, apparatus, and terminal.

Background technique

At present, the use of mobile phone cameras to capture images is increasingly popular with users. However, due to the depth of field when shooting, the obtained image is not completely clear. The object to be photographed can only be clearly imaged on the imaging surface within a limited distance before and after the focus point of the camera. The distance that can form a clear image is the depth of field.

The depth of field is determined by three factors: lens focal length, aperture value and shooting distance. For mobile phone cameras, due to hardware limitations, their aperture and focal length are fixed. To change the depth of field, you can only change the shooting distance. However, this change in depth of field is achieved by changing the focus point. The distance that can be clearly imaged is not actually changed, and the resulting image is clear only for a limited distance before and after the focus point.

Therefore, when the target camera is used to shoot the target, the depth of field is fixed after the focus is achieved, and the user cannot adjust (for example, increase or decrease) the depth of field to increase or decrease the distance of the clear imaging.

It can be seen that the mobile phone camera of the related art has a fixed depth of field, so it cannot meet the needs of photography enthusiasts, and is not humanized enough to affect the user experience.

Summary of the invention

The embodiment of the invention provides a method, a device and a terminal for adjusting the depth of field, so as to at least solve the defects in the related art that the user experience is affected by the fixed depth of field.

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

The technical solution adopted by the embodiment of the present invention is:

In a first aspect, a depth of field adjustment method is provided, including:

Focus on the target, collect a base image and calculate the current depth of field;

If the current depth of field range and the preset depth of field range are inconsistent, focus on the foreground depth direction and/or the back depth direction of the target object, and collect multiple images;

Superimpose the acquired multiple pictures, replace the blurred part with the part with the sharp focus or replace the part with the focus with the focus blur to obtain the picture with the preset depth of field.

Wherein, before the focusing on the target, the method further comprises: setting a preset depth of field range.

If the current depth of field range and the preset depth of field range are inconsistent, the steps of collecting multiple pictures and superimposing the pictures of the preset depth of field range include:

If the current depth of field range is smaller than the preset depth of field range, focus is performed in the foreground depth direction and/or the back depth direction, and multiple front and back scene images are acquired;

According to the preset depth of field range, the captured base picture and the front and back scene pictures are superimposed, and the focus blurred part of the base picture is replaced with the focus clear part of the front and back scene picture to obtain a picture with a preset depth of field range.

The superimposing the collected basic picture and the front and back scene images includes:

The focus blur portion of the base picture that is within the preset depth of field is replaced by the same portion of the front and back scene picture that is sharply focused.

If the current depth of field range is greater than the preset depth of field range, focus in the foreground depth direction and/or the back depth direction, and collect multiple front and back scene images;

According to the preset depth of field range, the collected basic picture and the front and back scene pictures are superimposed, and the focus blurred part in the front and back scene pictures is replaced with the focus clear part in the base picture to obtain a picture with a preset depth of field range.

In the base picture, in addition to the preset depth of field range, the other parts with sharp focus are replaced by the part with blurred focus.

The method further includes:

If the current depth of field range does not match the preset depth of field range, calculate a difference between the preset depth of field range and the current depth of field range;

Obtaining a ratio of the difference to a current depth of field range, and the collected number of the front and back scene images is greater than or equal to the ratio.

In a second aspect, a depth of field adjustment device is provided, including:

a first picture capturing device configured to focus on the target, collect a base picture, and calculate a current depth of field range;

The second picture capturing device is configured to: if the current depth of field range and the preset depth of field range are inconsistent, focus on the foreground depth direction and/or the back depth direction of the target object, and collect multiple pictures;

The compositing device is configured to superimpose the collected plurality of pictures, replace the blurred portion with a portion with a clear focus or replace the portion with a clear focus with a portion with a focus blur to obtain a picture of a preset depth of field range.

The second picture collection device is further configured to: if the second picture collection device determines that the current depth of field range does not match the preset depth of field range,

Calculating a difference between the preset depth of field range and the current depth of field range; obtaining a ratio of the difference to the current depth of field range, and the collected number of the front and back scene images is greater than or equal to the ratio.

In a third aspect, a terminal is provided, including the depth of field adjustment device described above.

In a fourth aspect, another depth adjustment method is provided, the method comprising:

Focusing on the target, and collecting a base picture of the target;

Calculate the current depth of field range;

When it is determined that the current depth of field range is different from the preset depth of field range, focus on the foreground depth direction and/or the back depth direction of the target object, and collect at least one new picture;

And according to the size relationship between the current depth of field range and the preset depth of field range, the collected new picture is superimposed with the base picture to obtain a clear picture of a preset depth of field range.

The method further includes: setting the preset depth of field range before the focusing on the target.

And the superimposing the collected new picture and the basic picture according to the size relationship between the current depth of field range and the preset depth of field range, including:

If the current depth of field range is smaller than the preset depth of field range, the collected base image and the at least one new image are superimposed according to the preset depth of field range, and the preset depth of field is replaced with the portion with clear focus in the new image. A portion of the base picture in the range where the focus is blurred at the same position, and a clear picture of the preset depth of field range is obtained.

If the current depth of field range is greater than the preset depth of field range, the collected base image and the at least one new image are superimposed according to the preset depth of field range, and the preset depth of field is replaced by the focus blurred portion of the new image. A portion with a clear focus at the same position in the base picture outside the range, and a clear picture of the preset depth of field range is obtained.

Wherein, when the determining that the current depth of field range is different from the preset depth of field range, the method further includes:

Calculating a difference between the preset depth of field range and the current depth of field range;

Obtaining a ratio of the difference to a current depth of field range, and determining, according to the ratio, the number of the new pictures to be collected.

The number of the collected new pictures is greater than or equal to a ratio of the difference to a current depth of field range.

In a fifth aspect, there is provided another depth of field adjustment device, the device comprising:

a first picture collecting unit configured to focus on the target, collect a base picture of the target, and calculate a current depth of field range;

a second picture collecting unit, configured to determine that the current depth of field range is different from the preset depth of field range, and focus on the foreground depth direction and/or the back depth direction of the target object to collect at least one new picture;

And a synthesizing unit, according to the size relationship between the current depth of field range and the preset depth of field range, superimposing the captured new picture and the basic picture to obtain a clear picture of a preset depth of field range.

Wherein, the device further comprises:

And a setting unit, configured to set the preset depth of field range before the first picture collecting unit focuses on the target.

Wherein, the second picture collecting unit determines that the current depth of field range is different from the preset depth of field range,

The method further includes: calculating a difference between the preset depth of field range and the current depth of field range; obtaining a ratio of the difference to the current depth of field range, and determining, according to the ratio, the number of the new pictures to be collected.

In a sixth aspect, there is provided another terminal, the terminal comprising the depth of field adjustment device described in the fifth aspect.

The depth-of-depth adjustment method, device and terminal of the embodiment of the invention can realize the user's custom control of the depth of field and control the range of clear imaging; and can be used for taking more personalized photo effects, such as background blurring and clear front and back scenes. Etc., more humane, more playable, greatly improving the user's shooting experience.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

The present invention will be further described below in conjunction with the accompanying drawings and embodiments, in which:

1 is a flow chart of a depth of field adjustment method according to an embodiment of the present invention;

2 is a schematic view showing the focus of an object according to an embodiment of the present invention;

3 is a schematic diagram of calculation of a depth of field range according to an embodiment of the present invention;

4 is a schematic diagram of a range of depth of field according to an embodiment of the present invention;

Figure 5 is a schematic illustration of an expanded depth of field range in accordance with an embodiment of the present invention;

6 is a schematic diagram of adjusting a range of depth of field according to an embodiment of the present invention;

7 is a schematic diagram of focusing a captured picture in a back depth direction of a target according to an embodiment of the present invention;

8 is a schematic diagram of a picture in which the depth of field obtained by superimposing the pictures of FIGS. 2 and 7 is enlarged;

FIG. 9 is a schematic diagram of a picture with clear front and back views obtained by an embodiment of the present invention; FIG.

Figure 10 is a block diagram showing the structure of a depth of field adjustment apparatus according to an embodiment of the present invention;

11 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

Figure 12 is a block diagram of the main electrical structure of a camera in accordance with an embodiment of the present invention.

Embodiments of the invention

The depth of field adjustment method, device and terminal of the embodiment of the invention can solve the defect that the relevant terminal depth of field is fixed and cannot meet the user's demand, obtain the custom control of the depth of field, and control the clear imaging range, which greatly improves the user's shooting experience.

In the embodiment of the present invention, when the preset depth of field range is inconsistent with the actual captured depth of field range, multiple images are collected in the foreground depth direction and/or the back depth direction of the target object, and the collected multiple images are superimposed. Replace the blurred part with the part with sharp focus or replace the part with the focus with the focus blur to obtain the picture of the preset depth of field orientation, to realize the custom control of the depth of field and the control of the clear imaging range.

For a better understanding of the technical features, objects and effects of the present invention, the embodiments of the present invention are described in detail with reference to the accompanying drawings.

1 is a flowchart of a depth of field adjustment method according to an embodiment of the present invention. The depth of field adjustment method of the embodiment of the invention includes the following steps:

S1, focus on the target, collect a basic picture and calculate the current depth of field range.

Before this step, the user can pre-customize the desired depth of field range through the touch screen, keyboard, etc. of the terminal. For example, if the depth of field range is set to 100 mm, the captured base picture is a clear image within 100 mm.

Referring to FIG. 2, the target 10 is focused, and after focusing, the focus 10 falls on the object 10, whereby the base picture 100 containing the object 10 is collected. The current depth of field range of the base picture 100 is calculated by the following equations (1) - (3).

Wherein, in conjunction with FIG. 3, where σ is the circle of confusion diameter, f is the lens focal length, F is the aperture value of the camera shooting, L is the shooting distance, ΔL ₁ is dark foreground, ΔL ₂ after depth, [Delta] L is the depth of field .

In the embodiment of the present invention, autofocusing can be performed by point focusing, weighted average focusing, or the like, or manually by the user. When manual focusing is performed, it can be achieved by moving the focus point to the target. For example, for a terminal with a touch function, the user can achieve manual focus by dragging the focus point 10 to fall on the target. In the diagram shown in Fig. 2, if the focus is manually focused, the focus point 20 can be dragged to the tree, the cuboid or the room.

S2. If the current depth of field range and the preset depth of field range are inconsistent, focus on the foreground depth direction and/or the back depth direction of the target object, and collect multiple images.

Specifically, referring to FIG. 4, the current depth of field calculated in step S1 is compared with the preset depth of field preset by the user. If the two are inconsistent, the focus is in the foreground depth direction and the back depth direction of the object 10, and the acquisition is performed. Picture. When the captured image is focused in the foreground depth direction and the back depth direction, the shooting distance L remains unchanged, and only the position of the focus point 20 is changed (ie, the image capturing device, for example, the position of the terminal should remain unchanged).

The number of captured images is determined by the difference between the current depth of field range and the preset depth of field range. Specifically, the difference between the preset depth of field range and the current depth of field range is calculated, and the difference is compared with the current depth of field range to obtain a ratio. The number of sheets of the collected picture is greater than or equal to the ratio (if the ratio is not an integer, the integer value is taken). For example, if the preset depth of field is 100mm and the current depth of field is 50mm, the difference between the two is 50mm, and the ratio is 1, you need to collect at least one foreground image or background image; if the current depth of field is 40, If the difference is 60 and the ratio is 1.5, then at least 2 foreground images and/or background images need to be acquired.

The foreground image or the background image can be collected according to the actual situation. Just ensure that the image with the preset depth of field can be obtained after the subsequent superimposition.

S3. Superimpose the collected multiple pictures, replace the blurred part with the part with clear focus or replace the part with clear focus with the part with the focus blur to obtain the picture of the preset depth of field range.

If the preset depth of field range Ly is larger than the current depth of field Ls range, multiple consecutive focusing is performed in the foreground depth direction and/or the back depth direction of the target, and multiple pictures are acquired. The number of sheets of the captured picture is determined by the above steps. Referring to Fig. 5, focusing is performed on the foreground depth and the back depth direction of the target (tree), respectively, and two pictures are collected. The meshed shaded portion of the figure represents the focus blur portion, and the rest is the focus sharp portion. It should be understood that the depth of field of the terminal is limited by hardware and cannot be adjusted. Therefore, before When the focus is taken in the depth of field direction and the depth of field, the depth of field range Ls2 and Ls1 are equal to Ls.

Specifically, when superimposing, the focus blur portion in the preset picture within the preset depth range is replaced by the same portion with clear focus in the front and back scene picture. That is, when the preset depth of field range is larger than the current depth of field range, when the overlay is superimposed, the base image (the first image in FIG. 5) is used as the initial frame, and the same portion of the different focus positions is superimposed (ie, superimposed on the target object) , replace the blurred part with the sharp part of the focus to get a larger depth of field range (ie, the preset depth of field range Ly).

If the preset depth of field range Ly is smaller than the current depth of field Ls, multiple consecutive focusing is performed in the foreground depth direction and/or the back depth direction of the target, and multiple pictures are acquired. The number of sheets of the captured picture is determined by the above steps. Referring to Fig. 6, focusing is performed on the foreground depth and the back depth direction of the target (tree), respectively, and two pictures are collected. The meshed shaded portion of the figure represents the focus blur portion, and the rest is the focus sharp portion. It should be understood that the depth of field of the terminal is limited by hardware and cannot be adjusted. Therefore, the depth of field range Ls2 and Ls1 and Ls are equal when the focus is photographed in the foreground depth direction and the back depth direction.

Specifically, when superimposing, in the basic picture, except for the preset depth of field range, other parts with clear focus are replaced by the part with blurred focus. That is, when the preset depth of field range Ly is smaller than the current depth of field range Ls, when the overlay is performed, the base image (the first image in FIG. 6) is used as the initial frame, and the same portion of the different focus positions is superimposed (ie, centered on the target) Superimpose), replace the clear part with the focus blur part to get a smaller depth of field range (ie preset depth range Ly).

Referring to FIG. 7 and FIG. 8 , and in conjunction with FIG. 2 , the depth of field adjustment method of the embodiment of the present invention can be superimposed by superimposing the base picture 100 and the front and rear depth of field pictures (the picture obtained by using the rectangular parallelepiped as the focus point as shown in FIG. 7 ). The depth of field of the base picture 100 is enlarged, and the picture shown in Fig. 8 is obtained. In Figure 8, the depth of field is enlarged, and the tree and the cuboid are clear parts. In addition, if the focus point is placed on the room, a picture with clear front and back views as shown in FIG. 9 can also be obtained.

The depth of field adjustment method of the embodiment of the invention can realize the user's custom control of the depth of field and control the range of clear imaging; and can be used for taking more personalized photo special effects, such as background blur, clear front and rear scenery, etc., and more humanized It is more playable and greatly enhances the user's shooting experience.

Referring to FIG. 10, an embodiment of the present invention further provides a depth of field adjustment apparatus, including:

The first picture capturing device 501 is configured to focus on the target, collect a base picture, and calculate a current depth of field range.

Autofocus can be done by point focus, weighted average focus, etc., or the user can focus manually (for example, by focusing on an object in the frame for manual focus). After focusing, the current depth of field range is calculated according to the above formulas (1)-(3).

The second picture capturing device 502 is configured to collect a plurality of pictures in the foreground depth direction and/or the back depth direction of the target if the current depth of field range and the preset depth of field range do not match.

The second picture collecting device 502 compares the difference between the current depth of field range and the user preset depth of field range, and the user preset depth of field range is larger or smaller than the current depth of field range, and the target depth (the subject) is continuously focused in front and rear depth directions (can pass Continuously push the camera motor to focus) and capture multiple pictures. It should be understood that the number of sheets of the collected picture is obtained by superimposing the picture to obtain a range of depth of field that is up to the user's preset depth of field. Specifically, if the current depth of field range does not match the preset depth of field range, calculating a difference between the preset depth of field range and the current depth of field range; obtaining a ratio of the difference to the current depth of field range, and collecting the number of the front and back scene images Greater than or equal to the ratio.

The synthesizing device 503 is configured to superimpose the acquired plurality of pictures, replace the blurred portion with a portion with a sharp focus or replace the portion with a clear focus with a portion with a focus blur to obtain a picture of a preset depth of field range.

Superimposing the acquired multi-frame picture: taking the base picture (original focus frame) as the initial frame, superimposing the same part of the focus position before and after, and replacing the focus blurred part with the part with clear focus to obtain a larger depth of field range; If the user's preset depth of field range is smaller than the current depth of field range, then the portion with the focus blur is replaced with the portion with the focus sharpness to obtain a smaller depth of field range.

It should be understood that the depth of field adjusting device of the embodiment of the present invention corresponds to the above-described depth of field adjusting method, and details are not described herein again.

Referring to FIG. 11, an embodiment of the present invention further provides a terminal, including a camera 200, a display screen 300, an input module 400, and the like, and a depth of field adjustment device 500 (shown in FIG. 10). 12 is a block diagram of a main electrical configuration of a camera of one embodiment of the present invention. Among them, the photographic lens 101 is composed of a plurality of optical lenses for forming a subject image. An imaging element 102 is disposed in the vicinity of a position where the subject image is formed by the photographing lens 101 on the optical axis of the photographing lens 101. The imaging element 102 functions as an imaging unit that captures a subject image and acquires captured image data. Photodiodes constituting each pixel are two-dimensionally arranged in a matrix on the imaging element 102. Each photodiode generates a photoelectric conversion current corresponding to the amount of received light, and the photoelectric conversion current is generated by each photodiode The connected capacitor performs charge accumulation. The front surface of each pixel is provided with a Bayer array of RGB color filters.

The imaging element 102 is connected to an imaging circuit 103 that performs charge accumulation control and image signal readout control in the imaging element 102, and performs waveform shaping after reducing the reset noise of the read image signal (analog image signal). Further, gain improvement or the like is performed to obtain an appropriate signal level.

The imaging circuit 103 is connected to the A/D conversion unit 104, which performs analog-to-digital conversion on the analog image signal, and outputs a digital image signal (hereinafter referred to as image data) to the bus 199.

The bus 199 is a transmission path for transmitting various data read or generated inside the camera. The A/D conversion unit 104 is connected to the bus 199, and an image processor 105, a JPEG processor 106, a microcomputer 107, a SDRAM (Synchronous DRAM) 108, and a memory interface (hereinafter referred to as a memory I/F) are connected. 109. LCD (Liquid Crystal Display) driver 110.

The image processor 105 performs various kinds of images such as OB subtraction processing, white balance adjustment, color matrix calculation, gamma conversion, color difference signal processing, noise removal processing, simultaneous processing, edge processing, and the like on the image data based on the output of the imaging element 102. deal with.

When the image data is recorded on the recording medium 115, the JPEG processor 106 compresses the image data read out from the SDRAM 108 in accordance with the JPEG compression method. Further, the JPEG processor 106 performs decompression of JPEG image data for image reproduction display. At the time of decompression, the file recorded on the recording medium 115 is read, and after the compression processing is performed in the JPEG processor 106, the decompressed image data is temporarily stored in the SDRAM 108 and displayed on the LCD 116. Further, in the present embodiment, the JPEG method is adopted as the image compression/decompression method. However, the compression/decompression method is not limited thereto, and other compression/decompression methods such as MPEG, TIFF, and H.264 may be used.

Input module 400 includes, but is not limited to, a physical button or a touch input screen or the like.

The flash memory 114 stores programs for executing various processing sequences of the microcomputer 107. The microcomputer 107 performs overall control of the camera in accordance with the program. Further, the flash memory 114 stores various adjustment values of the camera, and the microcomputer 107 reads out the adjustment value, and performs control of the camera in accordance with the adjustment value.

The SDRAM 108 is an electrically reprogrammable volatile memory for temporarily storing image data or the like. Reservoir. The SDRAM 108 temporarily stores image data output from the A/D conversion unit 104 and image data processed in the image processor 105, the JPEG processor 106, and the like.

The memory interface 109 is connected to the recording medium 115, and performs control for writing image data and a file header attached to the image data to the recording medium 115 and reading from the recording medium 115. The recording medium 115 is, for example, a recording medium such as a memory card that can be detachably attached to the camera body. However, the recording medium 115 is not limited thereto, and may be a hard disk or the like built in the camera body.

The LCD driver 110 is connected to the LCD 116, and stores image data processed by the image processor 105 in the SDRAM 108. When display is required, the image data stored in the SDRAM 108 is read and displayed on the LCD 116, or the image data stored in the JPEG processor 106 is compressed. In the SDRAM 108, when display is required, the JPEG processor 106 reads the compressed image data of the SDRAM 108, decompresses it, and displays the decompressed image data on the LCD 116.

The LCD 116 is disposed on the back surface of the camera body or the like to perform image display. The LCD 116 is provided with a touch panel that detects a user's touch operation. Further, in the present embodiment, the liquid crystal display panel (LCD 116) is disposed as the display portion. However, the present invention is not limited thereto, and various display panels such as an organic EL may be employed.

The microcomputer 107 functions as a control unit of the entire camera, and collectively controls various processing sequences of the camera. The microcomputer 107 is connected to the input module 400 and the flash memory 114.

Through the input module 400, the user customizes the range of depth of field required for taking a picture. When the picture starts, focus on the target in the camera frame.

The microcomputer 107 can control the device in the embodiment to perform the following operations: controlling the image capturing device 102, the camera 101 to focus on the target object, acquiring a base image and calculating the current depth of field range; if the current depth of field range and the preset depth of field If the ranges are inconsistent, the imaging element 102 and the camera 101 are controlled to focus in the foreground depth direction and/or the back depth direction of the object to collect multiple pictures; the collected multiple pictures are superimposed, and the blurred parts are replaced with the blurred parts. Partially replace the portion with sharp focus with a portion that is out of focus to get a picture of the preset depth of field.

Any process or method description in the flowcharts or otherwise described in the embodiments of the invention may be understood to represent code that includes one or more executable instructions for implementing the steps of a particular logical function or process. Modules, segments or portions, and the scope of the embodiments of the invention includes additional implementations, in which the functions may be performed in a substantially simultaneous manner or in an inverse order depending on the functions involved, in the order shown or discussed. This should be understood by those skilled in the art of the embodiments of the present invention.

The invention can also be implemented by a computer program product, which comprises all the features enabling the implementation of the method of the invention, which, when installed in a mobile terminal or computer system, can be implemented by operation. The computer program in this document refers to any expression of a set of instructions that can be written in any programming language, code or symbol that gives the system information processing capabilities to directly implement a particular function, or Specific functions are implemented after one or two steps: a) conversion to other languages, codes or symbols; b) reproduction in a different format.

The embodiments of the present invention have been described above with reference to the drawings, but the present invention is not limited to the specific embodiments described above, and the specific embodiments described above are merely illustrative and not restrictive, and those skilled in the art In the light of the present invention, many forms may be made without departing from the spirit and scope of the invention as claimed.

Industrial applicability

The present application discloses a depth of field adjustment method, device and terminal. The method comprises: focusing on a target object, collecting a basic picture and calculating a current depth of field range; if the current depth of field range and the preset depth of field range are inconsistent, the foreground of the target object Focus in the deep direction and/or the back depth direction to capture multiple images; superimpose multiple images captured, replace the blurred portion with a sharply focused portion or replace the sharply focused portion with the focus blur to obtain a preset depth of field Range of pictures. The application can realize the user's custom control of the depth of field and control the range of clear imaging; it can be used to shoot more personalized photo effects, such as background blur, clear front and back, etc., more humanized and more playable. Greatly improve the user's shooting experience.

Claims

A depth of field adjustment method, the method comprising:

Focus on the target, collect a base image and calculate the current depth of field;

If the current depth of field range and the preset depth of field range are inconsistent, focus on the foreground depth direction and/or the back depth direction of the target object, and collect multiple images;

Superimpose the acquired multiple pictures, replace the blurred part with the part with the sharp focus or replace the part with the focus with the focus blur to obtain the picture with the preset depth of field.
The depth of field adjustment method according to claim 1, before the focusing on the object, the method further comprises: setting a preset depth of field range.
The depth of field adjustment method according to claim 1, wherein if the current depth of field range and the preset depth of field range are inconsistent, the steps of collecting a plurality of pictures and superimposing the pictures of the preset depth of field range include:

If the current depth of field range is smaller than the preset depth of field range, focus is performed in the foreground depth direction and/or the back depth direction, and multiple front and back scene images are acquired;

According to the preset depth of field range, the captured base picture and the front and back scene pictures are superimposed, and the focus blurred part of the base picture is replaced with the focus clear part of the front and back scene picture to obtain a picture with a preset depth of field range.
The depth of field adjustment method according to claim 3, wherein the superimposing the collected base picture and the front and back scene pictures comprises:

The focus blur portion of the base picture that is within the preset depth of field is replaced by the same portion of the front and back scenes that are clearly focused.
The depth of field adjustment method according to claim 1, wherein if the current depth of field range and the preset depth of field range are inconsistent, the steps of collecting a plurality of pictures and superimposing the pictures of the preset depth of field range include:

If the current depth of field range is greater than the preset depth of field range, focus in the foreground depth direction and/or the back depth direction, and collect multiple front and back scene images;

According to the preset depth of field range, the collected base picture and the front and back scene pictures are superimposed, before use, The focus blur portion in the background image replaces the sharp portion in the base picture to obtain a picture with a preset depth of field range.
The depth of field adjustment method according to claim 5, wherein the superimposing the collected base picture and the front and back scene pictures comprises:

In the base picture, in addition to the preset depth of field range, the other parts with sharp focus are replaced by the part with blurred focus.
The depth of field adjustment method according to claim 1, further comprising:

If the current depth of field range does not match the preset depth of field range, calculate a difference between the preset depth of field range and the current depth of field range;

Obtaining a ratio of the difference to a current depth of field range, and the collected number of the front and back scene images is greater than or equal to the ratio.
A depth of field adjustment device, the device comprising:

a first picture capturing device configured to focus on the target, collect a base picture, and calculate a current depth of field range;

The second picture capturing device is configured to determine that the current depth of field range and the preset depth of field range are inconsistent, and then focus on the foreground depth direction and/or the back depth direction of the target object, and collect multiple pictures;

The compositing device is configured to superimpose the collected plurality of pictures, replace the blurred portion with a portion with a clear focus or replace the portion with a clear focus with a portion with a focus blur to obtain a picture of a preset depth of field range.
The depth of field adjusting device according to claim 8, wherein if the second picture capturing device determines that the current depth of field range does not coincide with the preset depth of field range, the second picture capturing device is further configured to:

Calculating a difference between the preset depth of field range and the current depth of field range; obtaining a ratio of the difference to the current depth of field range, and the collected number of the front and back scene images is greater than or equal to the ratio.
A terminal comprising the depth of field adjustment device of any one of claims 8-9.
A depth of field adjustment method, the method comprising:

Focusing on the target, and collecting a base picture of the target;

Calculate the current depth of field range;

When it is determined that the current depth of field range is different from the preset depth of field range, focus on the foreground depth direction and/or the back depth direction of the target object, and collect at least one new picture;

And according to the size relationship between the current depth of field range and the preset depth of field range, the collected new picture is superimposed with the base picture to obtain a clear picture of a preset depth of field range.
The depth of field adjustment method according to claim 11, before the focusing on the object, the method further comprises: setting the preset depth of field range.
The depth of field adjustment method according to claim 11, wherein the superimposing the captured new picture and the basic picture according to the size relationship between the current depth of field range and the preset depth of field range comprises:

If the current depth of field range is smaller than the preset depth of field range, the collected base image and the at least one new image are superimposed according to the preset depth of field range, and the preset depth of field is replaced with the portion with clear focus in the new image. A portion of the base picture in the range where the focus is blurred at the same position, and a clear picture of the preset depth of field range is obtained.
The depth of field adjustment method according to claim 11, wherein the superimposing the captured new picture and the basic picture according to the size relationship between the current depth of field range and the preset depth of field range comprises:

If the current depth of field range is greater than the preset depth of field range, the collected base image and the at least one new image are superimposed according to the preset depth of field range, and the preset depth of field is replaced by the focus blurred portion of the new image. A portion with a clear focus at the same position in the base picture outside the range, and a clear picture of the preset depth of field range is obtained.
The depth of field adjustment method according to claim 11, wherein when the current depth of field range is different from the preset depth of field range, the method further includes:

Calculating a difference between the preset depth of field range and the current depth of field range;

Obtaining a ratio of the difference to a current depth of field range, and determining, according to the ratio, the number of the new pictures to be collected.
The depth of field adjustment method according to claim 15, wherein said new map acquired The number of slices is greater than or equal to the ratio of the difference to the current depth of field range.
A depth of field adjustment device, the device comprising:

a first picture collecting unit configured to focus on the target, collect a base picture of the target, and calculate a current depth of field range;

a second picture collecting unit, configured to determine that the current depth of field range is different from the preset depth of field range, and focus on the foreground depth direction and/or the back depth direction of the target object to collect at least one new picture;

And a synthesizing unit, according to the size relationship between the current depth of field range and the preset depth of field range, superimposing the captured new picture and the basic picture to obtain a clear picture of a preset depth of field range.
The depth of field adjustment device of claim 17, further comprising:

And a setting unit, configured to set the preset depth of field range before the first picture collecting unit focuses on the target.
The depth of field adjusting device according to claim 17, wherein the second picture collecting unit determines that the current depth of field range is different from the preset depth of field range,

The method further includes: calculating a difference between the preset depth of field range and the current depth of field range; obtaining a ratio of the difference to the current depth of field range, and determining, according to the ratio, the number of the new pictures to be collected.
A terminal comprising the depth of field adjustment device of any one of claims 17-19.