WO2017133075A1

WO2017133075A1 - Method and apparatus for determining phase difference

Info

Publication number: WO2017133075A1
Application number: PCT/CN2016/078979
Authority: WO
Inventors: 潘林凯
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-02-01
Filing date: 2016-04-11
Publication date: 2017-08-10
Also published as: CN107026969A

Abstract

A method and apparatus for determining a phase difference. The method comprises: acquiring a first image shot by a camera at a first position, and acquiring a second image shot by the camera at a second position (S102); and determining a phase difference between the first image and the second image according to first pixel information about the first image and second pixel information about the second image (S104). The problems in the relevant technology that it is necessary to sacrifice an original pixel of an image sensor or an additional camera needs to be added when a camera acquires phase information are solved, so that the camera can not only complete phase focus, but also ensure the imaging quality, without an additional camera.

Description

Method and device for determining phase difference

Technical field

The present application relates to the field of imaging, for example, to a method and apparatus for determining a phase difference.

Background technique

With the development of microelectronics technology, the camera pixels are getting higher and higher, and the imaging quality has also been greatly improved. However, it is desirable to obtain the phase information of the image, wherein the phase information of the image can be obtained by sacrificing some pixels in the image sensor, or the image phase can be obtained by additionally adding a camera to form a dual camera. Information, that is, phase detection (PD), to assist in the focus of the camera. The reduction of effective pixels caused by the former affects the image quality, which is in contradiction with the increasing demand for image quality; the latter is an additional increase in the cost of a new camera and increased post-loading. The difficulty of tuning.

In the related art, when the phase information of the image is acquired, there is a problem that the original pixel of the image sensor is sacrificed or an additional camera is required, and an effective solution has not been found yet.

Summary of the invention

The embodiment of the invention provides a method and a device for determining a phase difference, so as to solve at least the problem that the camera needs to sacrifice the original pixels of the image sensor or need to additionally increase the camera when acquiring the phase information of the image in the related art.

An embodiment of the present invention provides a method for determining a phase difference, comprising: acquiring a first image captured by a camera at a first location, and acquiring a second image captured by the camera at a second location; The first pixel information and the second pixel information of the second image determine a phase difference between the first image and the second image.

Optionally, the acquiring the first image captured by the camera at the first location, and acquiring the second image captured by the camera at the second location comprises: acquiring the camera at the first position after the camera is activated a first image; driving the camera to move a specified distance in a predetermined direction to reach a second a position, wherein the specified distance is an integer multiple of a distance occupied by the unit pixel in the preset direction; after driving the camera to move a specified distance in a preset direction to reach the second position, acquiring the camera in the The second image taken at the second position.

Optionally, the preset direction is a horizontal direction or a vertical direction.

Optionally, determining, according to the first pixel information of the first image and the second pixel information of the second image, determining a phase difference between the first image and the second image comprises: separately calculating a first pixel light intensity distribution curve of the first image and a second pixel light intensity distribution curve of the second image, wherein a position of the first pixel in the first image and the second pixel are Corresponding to positions in the second image;

A peak difference between the first pixel light intensity distribution curve and the second pixel light intensity distribution curve is determined as the phase difference.

Optionally, determining the peak difference between the first pixel light intensity distribution curve and the second pixel light intensity distribution curve as the phase difference comprises: calculating a peak pixel of the first pixel light intensity distribution curve And a position difference of a peak pixel of the second pixel light intensity distribution curve; and multiplying the position difference by a size of the unit pixel in a vertical direction to obtain the phase difference.

Optionally, the first pixel light intensity distribution curve includes: a pixel light intensity distribution curve of one or more columns of pixels along a first predetermined starting position of the first image; and the second pixel light intensity distribution The curve includes a pixel intensity distribution curve of one or more columns of pixels along a second predetermined starting position of the second image.

The embodiment of the present invention further provides a phase difference determining apparatus, including: an acquiring module, configured to acquire a first image captured by the camera at the first position, and acquire a second image captured by the camera at the second position; And a module configured to determine a phase difference between the first image and the second image according to the first pixel information of the first image and the second pixel information of the second image.

Optionally, the acquiring module includes: a first acquiring unit, configured to acquire a first image captured by the camera at the first position after the camera is started; and a driving unit configured to drive the camera along the preset Moving the specified distance to the second position, wherein the specified distance is an integer multiple of the distance occupied by the unit pixel in the preset direction; and the second obtaining unit is configured to be driven by the driving unit After the camera moves a predetermined distance in the preset direction to reach the second position, the second image captured by the camera at the second position is acquired.

Optionally, the determining module includes: a calculating unit configured to separately calculate a first pixel light intensity distribution curve of the first image and a second pixel light intensity distribution curve of the second image, wherein the a position of a pixel in the first image and a position of the second pixel in the second image; a determining unit configured to set the first pixel light intensity distribution curve and the second pixel light The peak difference of the strong distribution curve is determined as the phase difference.

Optionally, the determining unit includes: a calculating subunit, configured to calculate a position difference between a peak pixel of the first pixel light intensity distribution curve and a peak pixel of the second pixel light intensity distribution curve; determining a subunit, It is set to multiply the position difference and the size of the unit pixel in the vertical direction to obtain the phase difference.

The embodiment of the invention further provides a computer readable storage medium storing computer executable instructions for performing the above method.

Embodiments of the present invention also provide an apparatus including one or more processors, a memory, and one or more programs, the one or more programs being stored in a memory when executed by one or more processors , perform the above method.

According to the technical solution of the embodiment of the present invention, the first image captured by the camera at the first position is acquired, and the second image captured by the camera at the second position is acquired; according to the first pixel information of the first image and the The second pixel information of the second image determines a phase difference between the first image and the second image, acquires a pair of images at different positions by one camera, and then obtains phase difference information by comparing the two images without It is necessary to sacrifice the pixels of the camera's original image sensor, and does not need to use other additional cameras. In the related art, the camera needs to sacrifice image sensing when acquiring phase information. The original pixel of the device or the need to add additional camera problems, the camera can achieve phase focusing, but also to ensure the image quality, without the need to add additional camera effects.

DRAWINGS

The drawings described herein are intended to provide an understanding of the invention, and are intended to be a part of this application. In the drawing:

1 is a flow chart of a method of determining a phase difference according to an embodiment of the present invention;

2 is a block diagram showing the structure of a phase difference determining apparatus according to an embodiment of the present invention;

3 is a block diagram showing an optional structure of a phase difference determining apparatus according to an embodiment of the present invention;

4 is a block diagram 2 of an optional structure of a phase difference determining apparatus according to an embodiment of the present invention;

5 is a block diagram 3 of an optional structure of a phase difference determining apparatus according to an embodiment of the present invention;

Figure 6 is a block diagram showing the structure of an apparatus in accordance with an alternative embodiment of the present invention;

7 is a schematic diagram of camera movement according to an alternative embodiment of the present invention;

FIG. 8 is a schematic diagram of pixel distribution of an image taken by a avatar head according to an alternative embodiment of the present invention; FIG.

FIG. 9 is a schematic structural diagram of hardware of a device according to an embodiment of the present invention.

Implementation

There are two types of cameras capable of PD in the related art. One is to add special pixels based on the original pixels of the image sensor. These special pixels can achieve the effect of PD. These special pixels appear in pairs, and two Each pixel (ie, a pair of pixels) can only detect the intensity values of the two regions located in the left and right of the pixel and cannot image. The second is to add an additional camera, the additional camera and the original camera constitute a dual camera similar to the human eye (two eyes) to achieve the effect of PD.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

It should be noted that the descriptions and claims of the embodiments of the present invention and the terms in the above drawings "First", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a particular order or order.

In this embodiment, a method for determining a phase difference is provided, and the method can be applied to a terminal having a camera function, such as a mobile phone, a camera, a camera, and the like. FIG. 1 is a flowchart of a method for determining a phase difference according to an embodiment of the present invention. As shown in FIG. 1, the process includes the following steps:

Step S102, acquiring a first image captured by the camera at the first position, and acquiring a second image captured by the camera at the second position;

In this embodiment, after the camera is activated, the first image and the second image are respectively captured at different positions. Alternatively, the first image and the second image may be separately labeled and saved in pairs.

Step S104, determining a phase difference between the first image and the second image according to the first pixel information of the first image and the second pixel information of the second image.

The technical solution of the embodiment is: acquiring a first image captured by the camera at the first position, and acquiring a second image captured by the camera at the second position; according to the first pixel information of the first image and the second pixel of the second image The information determines the phase difference between the first image and the second image, obtains a pair of images at different positions by one camera, and then compares the two image phase difference information without sacrificing the pixels of the original image sensor of the camera. There is no need to use other cameras to solve the problem that the camera in the related art needs to sacrifice the original pixels of the image sensor or need to additionally increase the camera when acquiring the phase information, thereby achieving the camera not only achieving phase focusing but also ensuring image quality. No additional camera effects are required.

In an optional implementation manner of this embodiment, acquiring the first image captured by the camera at the first location, and acquiring the second image captured by the camera at the second location includes:

S11, after the camera is started, acquiring a first image captured by the camera at the first position;

S12. The driving camera moves the specified distance in the preset direction to reach the second position, wherein the specified distance is an integer multiple of the distance occupied by the unit pixel in the preset direction;

Optionally, the camera may be driven by a driving motor connected to the camera, wherein the driving direction, that is, the preset direction, may be a horizontal direction or a vertical direction. In the embodiment, for the convenience of description, the horizontal direction or the vertical direction The x-direction and the y-direction respectively drive the motor to drive the camera to move The distance length, that is, the specified distance of movement, is an integral multiple of the distance occupied by the unit pixel in the driving direction. If the camera moves in the x direction and the distance of the unit pixel in the x direction is A, the position of the camera in the x direction after the movement is: the first position + NA, where N is an integer greater than 0.

S13: After the driving camera moves the specified distance in the preset direction to reach the second position, acquiring the second image captured by the camera in the second position.

In an optional implementation manner of this embodiment, determining, according to the first pixel information of the first image and the second pixel information of the second image, a phase difference between the first image and the second image includes:

S21, respectively calculating a first pixel light intensity distribution curve of the first image and a second pixel light intensity distribution curve of the second image, wherein the position of the first pixel in the first image and the second pixel in the second image Position corresponding

S22. Determine a peak difference between the first pixel light intensity distribution curve and the second pixel light intensity distribution curve as a phase difference.

Optionally, the first pixel light intensity distribution curve includes: a pixel light intensity distribution curve of one or more columns of pixels along a first predetermined starting position of the first image; and the second pixel light intensity distribution curve includes: along the second A pixel intensity distribution curve of one or more columns of pixels starting from a second predetermined starting position of the image.

Optionally, after the driving horizontal motor moves the second image by moving the distance of two pixels in the +x direction, calculating the first column of pixel light intensity values of the first image along the y direction and the third column of the second image along the y direction a pixel light intensity value, since the second image is captured after the first image is moved by a distance of two pixels in the +x direction, the first column of pixels of the first image and the third column of pixels of the second image are in the first image Corresponding to the position in the second image, for example, may be the first column of pixels on the left side of the image, and the phase difference information may be calculated by comparing the two, and the second image of the first image may be correspondingly calculated in sequence. The phase difference information of the third, fourth, and sixth columns of the third, fourth, and second images can finally obtain the phase difference information of the entire image of the two images.

Optionally, determining the peak difference between the first pixel intensity distribution curve and the second pixel intensity distribution curve as the phase difference can be implemented by the following steps, including:

S31. Calculate a position difference between a peak pixel of the first pixel light intensity distribution curve and a peak pixel of the second pixel light intensity distribution curve;

S32, multiplying the position difference and the size of the unit pixel in the vertical direction to obtain a phase difference.

Through the description of the above embodiments, those skilled in the art can clearly understand that the method of the foregoing embodiment can implement the software product in a storage medium (such as ROM/RAM) by means of software plus a necessary general hardware platform. The storage medium includes a plurality of instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the methods of various embodiments of the present application.

In the embodiment, a phase difference determining device is also provided. The device may be disposed in the camera or may be coupled to other camera devices that can take pictures. The device can implement the above embodiments and optional embodiments, and the descriptions thereof have been omitted. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the devices described in the following embodiments may be implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

2 is a structural block diagram of a phase difference determining apparatus according to an embodiment of the present invention. As shown in FIG. 2, the apparatus includes:

The acquiring module 20 is configured to acquire a first image captured by the camera at the first position, and acquire a second image captured by the camera at the second position;

The determining module 22 is configured to determine a phase difference between the first image and the second image according to the first pixel information of the first image and the second pixel information of the second image.

FIG. 3 is a block diagram of an optional structure of a phase difference determining apparatus according to an embodiment of the present invention. As shown in FIG. 3, the acquiring module 20 may further include:

The first obtaining unit 30 is configured to acquire a first image captured by the camera at the first position after the camera is started;

The driving unit 32 is configured to drive the camera to move the specified distance in the preset direction to reach the second position, wherein the specified distance is an integer multiple of the distance occupied by the unit pixel in the preset direction;

The second obtaining unit 34 is configured to obtain a second image captured by the camera at the second position after the driving unit drives the camera to move the specified distance in the preset direction to reach the second position.

4 is a block diagram of an optional structure of a phase difference determining apparatus according to an embodiment of the present invention. As shown in FIG. 4, the determining module may further include:

The calculating unit 40 is configured to respectively calculate a first pixel light intensity distribution curve of the first image and a second pixel light intensity distribution curve of the second image, wherein the position of the first pixel in the first image and the second pixel are in the The position in the two images corresponds;

The determining unit 42 is configured to determine a peak difference between the first pixel light intensity distribution curve and the second pixel light intensity distribution curve as a phase difference.

Optionally, the first pixel intensity distribution curve includes: a pixel intensity distribution curve of one or more columns of pixels along a first predetermined starting position of the first image;

The second pixel light intensity distribution curve includes a pixel light intensity distribution curve of one or more columns of pixels along a second predetermined starting position of the second image.

FIG. 5 is a block diagram 3 of an optional structure of a phase difference determining apparatus according to an embodiment of the present invention. As shown in FIG. 5, the determining unit 42 may further include:

The calculating subunit 50 is configured to calculate a position difference between a peak pixel of the first pixel light intensity distribution curve and a peak pixel of the second pixel light intensity distribution curve;

The determining subunit 52 is arranged to multiply the position difference by the size of the unit pixel in the vertical direction to obtain a phase difference.

The present application is specifically described below in conjunction with an optional embodiment in accordance with the present application:

This alternative embodiment uses a single camera to acquire photo phase information on a conventional image sensor sensor. This alternative embodiment designs a camera that allows all pixels of the image sensor to be imaged normally and also to obtain image phase information.

FIG. 6 is a structural block diagram of an apparatus according to an alternative embodiment of the present application. As shown in FIG. 6, the module of this embodiment includes:

The image acquisition module 60 is configured to collect a photo of the output of the camera for processing by the back end;

Horizontal drive motor 62: configured to move the camera in a horizontal direction so that the camera acquires a photo with phase information;

The photo storage module 64 is configured to store the photographed camera in a horizontal direction to obtain the phase difference information for the back end;

Phase difference calculation module 66: configured to process two phase information maps in the storage module to obtain phases Position information.

In this embodiment, two photos with a certain parallax (the distance that the camera moves two pixels horizontally) are sequentially collected, and then the light intensity distribution curves of the corresponding pixels in the two photos are respectively calculated, and the corresponding pixel lights in the two images are compared. The phase difference information of the strong distribution curve can calculate the phase difference information.

In this embodiment, an image sensor in an ordinary camera is used. All pixel points of the image sensor can be used for normal imaging, and the objective resolution and noise test are superior to the image sensor with special pixels. The more pairs of pixels that acquire phase difference information, the more accurate the final calculated phase difference information. In this embodiment, only one camera can be used to make the effect of the dual camera, so that the cost is greatly reduced, and the difficulty of the post-installation is also greatly reduced.

The phase difference determining method of the present embodiment can acquire phase difference information of an image without sacrificing the original pixels of the image sensor and without adding an additional camera. The specific implementation method includes: FIG. 7 is a schematic diagram of camera movement according to an optional embodiment of the present invention. As shown in FIG. 7 , in this embodiment, by acquiring the phase information of the captured scene by moving the camera lens barrel in the x direction, the calculation can be performed. Image phase difference information.

S41, start the camera, give the camera a series of operations such as power-on and initialization, so that the camera is in normal working state;

S42, let the camera take a picture in the current state, and name it phase1 (first image) stored in the photo storage module;

S43, driving the horizontal motor to move the distance of two pixels in the +x direction (shown in Figure 7), and let the camera take a picture, named phase2 (second image) stored in the photo storage module;

S44, calculating the first column pixel light intensity value of the phase1 photo along the y direction (shown in FIG. 7) and the third column pixel light intensity value of the phase2 photo along the y direction, and comparing the two to calculate the phase difference information, and then sequentially Corresponding to calculate the phase difference information of the second, third, fourth... column of phase1 and the fourth, fifth, sixth... column of phase2, finally obtain the phase difference information of the whole photo.

FIG. 8 is a schematic diagram of a pixel distribution of a camera-captured image according to an alternative embodiment of the present application. As shown in FIG. 8, the image in FIG. 8 includes 0-3151 rows, 0-4255 columns, if photographed. The photo pixel is 13M, taking column 0 (columns), that is, the channel is the image of BGBG...BG column The light intensity distribution curve of the prime, because the light intensity distribution of the pixels on the same column exhibits a Gaussian distribution, the light intensity distribution curve on the 0th column is a curve similar in shape to a sinusoid. Take the light intensity distribution curve of the pixel in column 0 of the phase1 photo and the light intensity distribution curve of the pixel in the second column in phase2, and move the two curves along the x direction to the same plane, and compare the pixel positions of the peaks of the two curves in the y direction. Calculate the difference between the peak position of the two curves and multiply the size of the single pixel in the y direction to obtain the phase difference information.

It should be noted that the above modules may be implemented by software or hardware. For the latter, the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the modules are respectively located in multiple processes. In the device.

Embodiments of the present invention also provide a computer readable storage medium. Optionally, in the embodiment, the computer readable storage medium may be configured to store program code for performing the following steps:

S1, acquiring a first image captured by the camera at the first position, and acquiring a second image captured by the camera at the second position;

S2. Determine a phase difference between the first image and the second image according to the first pixel information of the first image and the second pixel information of the second image.

Optionally, in this embodiment, the foregoing storage medium may include, but is not limited to, any one of the following: a USB flash drive, a Read-Only Memory (ROM), a Random Access Memory (RAM), A variety of media that can store program code, such as a hard disk, a disk, or an optical disk.

Optionally, in this embodiment, the processor performs, according to the stored program code in the computer readable storage medium, the first image captured by the camera at the first location, and the second image captured by the camera at the second location;

Optionally, in this embodiment, the processor determines, according to the stored program code in the computer readable storage medium, the first image and the second image according to the first pixel information of the first image and the second pixel information of the second image. The phase difference between the images.

For an alternative example in this embodiment, reference may be made to the examples described in the foregoing embodiments and the optional embodiments, and details are not described herein again.

It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device, which can be centralized on a single computing device, or distributed over a plurality of Optionally, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be The steps shown or described are performed in a different order than that herein, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

FIG. 9 is a schematic structural diagram of a hardware of a device according to an embodiment of the present invention. As shown in FIG. 9, the device includes:

One or more processors 710, one processor 710 is taken as an example in FIG. 9;

Memory 720;

The device may also include an input device 730 and an output device 740.

The processor 710, the memory 720, the input device 730, and the output device 740 in the device may be connected by a bus or other means, and the bus connection is taken as an example in FIG.

The memory 720 is used as a computer readable storage medium for storing software programs, computer executable programs, and modules, such as the program instructions/modules corresponding to the method for determining the phase difference in the embodiment of the present invention (for example, as shown in FIG. 2) The acquisition module 22 and the determination module 23). The processor 710 executes various functional applications and data processing of the server by executing software programs, instructions, and modules stored in the memory 720, that is, a method of determining the phase difference of the above-described method embodiments.

The memory 720 may include a storage program area and an storage data area, wherein the storage program area may store an operating system, an application required for at least one function; the storage data area may store data created according to usage of the terminal device, and the like. Moreover, memory 720 can include high speed random access memory, and can also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some embodiments, memory 720 can optionally include memory remotely located relative to processor 710, which can be connected to the terminal device over a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

Input device 730 can be used to receive input numeric or character information and to generate key signal inputs related to user settings and function control of the terminal. The output device 740 can include a display device such as a display screen.

The one or more modules are stored in the memory 720, and when executed by the one or more processors 710, the method of determining the phase difference of the above-described embodiments and the optional real-time mode is performed.

Industrial applicability

The method for determining the phase difference according to the embodiment of the present invention solves the problem that the camera needs to sacrifice the original pixel of the image sensor or needs to additionally increase the camera when acquiring the phase information in the related art, thereby achieving the camera can achieve phase focusing and guarantee Image quality, no additional camera effect.

Claims

A method for determining a phase difference, comprising:

Acquiring a first image captured by the camera at the first location, and acquiring a second image captured by the camera at the second location;

Determining a phase difference between the first image and the second image according to the first pixel information of the first image and the second pixel information of the second image.
The method of claim 1, wherein the obtaining the first image captured by the camera at the first location and acquiring the second image captured by the camera at the second location comprises:

After the camera is activated, acquiring a first image captured by the camera at the first position;

Driving the camera to move a specified distance in a preset direction to a second position, wherein the specified distance is an integer multiple of a distance occupied by the unit pixel in the preset direction;

After driving the camera to move the specified distance in the preset direction to the second position, acquiring the second image captured by the camera at the second position.
The method of claim 2, wherein the predetermined direction is a horizontal direction or a vertical direction.
The method of claim 1, wherein the determining between the first image and the second image is based on first pixel information of the first image and second pixel information of the second image The phase difference includes:

Calculating a first pixel light intensity distribution curve of the first image and a second pixel light intensity distribution curve of the second image, wherein a position of the first pixel in the first image and the first The position of the two pixels in the second image corresponds;

A peak difference between the first pixel light intensity distribution curve and the second pixel light intensity distribution curve is determined as the phase difference.
The method according to claim 4, wherein the determining a peak difference between the first pixel light intensity distribution curve and the second pixel light intensity distribution curve as the phase difference comprises:

Calculating a position difference between a peak pixel of the first pixel light intensity distribution curve and a peak pixel of the second pixel light intensity distribution curve;

The phase difference is obtained by multiplying the position difference and the size of the unit pixel in the vertical direction.
The method of claim 4, wherein

The first pixel light intensity distribution curve includes: a pixel light intensity distribution curve of one or more columns of pixels along a first predetermined starting position of the first image;

The second pixel light intensity distribution curve includes a pixel light intensity distribution curve of one or more columns of pixels along a second predetermined starting position of the second image.
A determining device for phase difference, comprising:

Obtaining a module, configured to acquire a first image captured by the camera at the first location, and acquire a second image captured by the camera at the second location;

And a determining module configured to determine a phase difference between the first image and the second image according to the first pixel information of the first image and the second pixel information of the second image.
The apparatus of claim 7, wherein the obtaining module comprises:

a first acquiring unit, configured to acquire a first image captured by the camera at the first position after the camera is started;

a driving unit configured to drive the camera to move a predetermined distance in a preset direction to a second position, wherein the specified distance is an integer multiple of a distance occupied by the unit pixel in the preset direction;

And a second acquiring unit, configured to: after the driving unit drives the camera to move a predetermined distance in a preset direction to reach the second position, acquire a second image captured by the camera at the second position.
The apparatus according to claim 8, wherein the predetermined direction is a horizontal direction or a vertical direction.
The apparatus of claim 7, wherein the determining module comprises:

a calculating unit, configured to separately calculate a first pixel light intensity distribution curve of the first image and a second pixel light intensity distribution curve of the second image, wherein the first pixel is in the first image a position corresponding to a position of the second pixel in the second image;

The determining unit is configured to determine a peak difference between the first pixel light intensity distribution curve and the second pixel light intensity distribution curve as the phase difference.
The apparatus of claim 10, wherein the determining unit comprises:

Calculating a subunit, configured to calculate a peak pixel of the first pixel light intensity distribution curve and the first The position difference of the peak pixels of the two-pixel intensity distribution curve;

The determining subunit is configured to multiply the position difference and the size of the unit pixel in the vertical direction to obtain the phase difference.
The device according to claim 10, wherein

The first pixel light intensity distribution curve includes: a pixel light intensity distribution curve of one or more columns of pixels along a first predetermined starting position of the first image;

The second pixel light intensity distribution curve includes a pixel light intensity distribution curve of one or more columns of pixels along a second predetermined starting position of the second image.
A computer readable storage medium storing computer executable instructions arranged to perform the method of any of claims 1-6.