WO2019080616A1

WO2019080616A1 - Synchronous focus method and apparatus

Info

Publication number: WO2019080616A1
Application number: PCT/CN2018/101057
Authority: WO
Inventors: 林一育; 朱力于; 王斌; 高翔
Original assignee: 华为技术有限公司
Priority date: 2017-10-24
Filing date: 2018-08-17
Publication date: 2019-05-02
Also published as: CN109698902B; CN109698902A

Abstract

Disclosed by an embodiment of the present invention are a synchronous focus method and apparatus, which are beneficial in improving the quality of captured images. The method comprises: an image capture device acquiring a first image within a viewing frame when capturing a zoomed-in image; the image capture device respectively adjusting the positions of N zoom motors and focus motors thereof such that the sharpness of the first image acquired within the viewing frame meets a preset condition, thus achieving focusing; N is an integer greater than or equal to 2.

Description

Synchronous focusing method and device

The present application claims priority to Chinese Patent Application, filed on Jan. 24,,,,,,,,,,,,,,,,,,,,,,,,,,,,, .

Technical field

Embodiments of the present invention relate to the field of video surveillance, and in particular, to a synchronous focus method and apparatus.

Background technique

The lens is a very important component in image capturing equipment such as cameras and internet protocol cameras (IPC). The lens of current image capturing apparatuses often includes a plurality of lenses (concave, convex lenses), that is, imaging by a combination of a plurality of lenses. Generally, a plurality of lenses in the lens that adjust the focal length are combined into a whole, called a zoom group, and the zoom group corresponds to a zoom motor, and the position of the zoom group is adjusted by the zoom motor to adjust the magnification. A plurality of lenses that function to adjust imaging are combined into a whole, called a focus group, which also corresponds to a focus motor, by which the position of the focus group is adjusted, thereby adjusting the focus position.

Since the current image capturing apparatus includes only a single zoom group and a single focus group, that is, only one zoom motor and one focus motor are included. It can be seen that the structure of the lens in the current image capturing device is too simple, and the movement of the zoom group or the focus group is not flexible enough.

Summary of the invention

The embodiment of the invention provides a synchronous focusing method and device, which are used to solve the technical problem that the structure of the lens in the current image capturing device is relatively simple, and the movement of the zoom group or the focus group is not flexible enough.

In a first aspect, an embodiment of the present invention provides a synchronization focusing method, the method includes: during a zoom shooting process, an image capturing device acquires a first image in a framing frame; and the image capturing device respectively adjusts N of the photographic frames The respective positions of the zoom motor and the focus motor are such that the sharpness of the first image in the finder frame satisfies a preset condition to achieve focusing; wherein N is an integer greater than or equal to 2.

In the embodiment of the present invention, the image capturing apparatus is provided with a focus motor and N variable magnification motors, and during zooming, the position of each of the focus motor and the N variable magnification motors is adjusted to make the frame of the image capturing apparatus The resolution of the image satisfies the preset condition, and solves the technical problem that the structure of the lens in the current image capturing device is too simple, and at the same time helps to improve the quality of the image taken by the image capturing device.

In a possible design, the image capturing device respectively adjusts the respective positions of the N variable power motors and the focus motors in the self, including: the image capturing device determines the reference zoom motor of the N variable power motors a first target position; the image capturing device respectively determines a target position of each of the other N-1 variable power motors and the focus motor according to the first target position of the reference zoom motor; the image capturing device sets the N The variable power motor and the focus motor are respectively moved to respective target positions.

In the embodiment of the present invention, the image capturing apparatus itself has N variable power motors, and one of the N variable power motors is a reference zoom motor, and the image capturing apparatus can determine the other according to the first target position of the reference zoom motor. The respective target positions of the N-1 variable-magnification motors and the focus motors, that is, the respective motors (N variable-magnification motors, focus motors) in the image capturing device are interlocked with each other, which solves the structure of the lens in the current image capturing device. Too simple, and the movement of the zoom group or the focus group is not flexible enough to improve the quality of image capture.

In a possible design, the image capturing apparatus respectively determines the target positions of the other N-1 variable power motors according to the first target position of the reference zoom motor, including: the image capturing apparatus changes according to the reference Determining, by a first target position of the motor and a first following curve, a second target position of the first variable power motor; the first variable power motor being any one of the N-1 variable power motors, the first A following curve is used to indicate a positional relationship between the reference zoom motor and the first zoom motor.

In the embodiment of the present invention, the image capturing apparatus may determine the first variable power motor (any one of the N-1 variable power motors) according to the first target position of the reference zoom motor and the first following curve. a second target position, the first following curve is used to indicate a positional relationship between the reference zoom motor and the first zoom motor. That is, the image capturing apparatus may sequentially determine the respective target positions of the other N-1 variable power motors according to the first target position of the reference zoom motor, and since the image capturing apparatus is the first variable power motor determined according to the first following curve The second target position, so the determined second target position of the first zoom motor is relatively accurate.

In a possible design, the image capturing apparatus respectively determines the target positions of the other N-1 variable power motors according to the first target position of the reference zoom motor, including: the image capturing apparatus changes according to the reference Determining a second target position of the first zoom motor with a first target position and a first following curve; the first following curve is used to indicate between the reference zoom motor and the first zoom motor a positional relationship; the first variable power motor is any one of the N-1 variable power motors; the image capturing device determines the N- according to a second target position of the first variable power motor A target position of each of the variable power motors of the one variable power motor other than the first variable power motor.

In an embodiment of the present invention, the image capturing apparatus may determine a second target position of the first variable power motor (any one of the N-1 variable power motors) according to the first target position of the reference zoom motor, and then The target positions of the other N-2 variable power motors are sequentially determined according to the second target position of the first zoom motor, so that the linkage mode between the N variable power motors in the image capturing device is flexible, and the current image is solved. The structure of the lens in the shooting device is too simple technical problem and helps to improve the quality of image capture.

In one possible design, before the image capturing device acquires the image in the framing frame, the image capturing device receives a zoom instruction through its own input component; the image capturing device determines a reference change in the N variable power motors a first target position of the motor, comprising: the image capturing device acquiring an initial position of the reference zoom motor in the N variable power motors; N being a positive integer greater than or equal to 2; the image capturing device is based on the change The zoom rate and the initial position included in the multiple command determine the first target position of the reference zoom motor at the first preset time.

In the embodiment of the present invention, the image capturing apparatus may determine the first target position of the reference zoom motor at the first preset time according to the zoom instruction and the initial position of the reference zoom motor, if the zoom instruction is the user passing the image capturing device The input unit inputs an instruction, and the image capturing device can adjust the first target position of the base station zoom motor in real time according to the input operation of the user, and then adjust the respective target positions of the other N-1 variable power motors and the focus motor in linkage, That is to say, the linkage mode between the motors in the image capturing device is relatively flexible.

In one possible design, the image capturing apparatus determines a target position of the focus motor according to the first target position of the reference zoom motor, including: the image capturing apparatus according to the first target position of the reference zoom motor And a second following curve determining a third target position of the focus motor, the second following curve being used to indicate a positional relationship between the reference zoom motor and the focus motor, or

The image capturing apparatus determines a third target position of the focus motor according to a second target position of the first zoom motor and a second following curve, the second following curve is used to indicate the first zoom motor A positional relationship with the focus motor.

In the embodiment of the present invention, since the image capturing apparatus has N variable-magnification motors, the image capturing apparatus can determine the target position of the focus motor in various manners, for example, the image capturing apparatus according to the first target of the reference zoom motor The position and the second following curve determine a third target position of the focus motor, and the second following curve is used to indicate a positional relationship between the reference zoom motor and the focus motor. For another example, the image capturing apparatus determines the third target position of the focus motor according to the second target position of the first variable power motor (any one of the N-1 variable power motors) and the second following curve, the second following curve It is used to indicate the positional relationship between the first zoom motor and the focus motor. Therefore, the image capturing apparatus may determine the third target position of the focus motor according to the first target position of the reference zoom motor, or determine the second target position of the first zoom motor according to the first target position of the reference zoom motor, and then The third target position of the focus motor is determined according to the second target position of the first zoom motor, that is, the linkage mode of each motor in the image capturing apparatus is flexible.

In one possible design, the image capturing apparatus acquires the image capturing apparatus before the third target position of the focus motor is adjusted according to the first target position of the reference zoom motor and the second following curve. Focusing an initial position of the motor; the image capturing apparatus determining a first object distance according to respective initial positions of the focus motor and the reference zoom motor; the image capturing apparatus determining the basis according to the first object distance and an imaging function The second following curve is described.

In an embodiment of the present invention, the image capturing apparatus may first determine a second following curve in order to obtain a third target position of the focus motor. For example, the first object distance may be determined according to respective initial positions of the focus motor and the reference zoom motor, and then according to The first object distance and the imaging function determine a second following curve, ie, the second following curve may reflect a positional relationship between the reference zoom motors of the focus motor of the first object distance.

In a possible design, if the image capturing apparatus moves the N variable power motors and the focus motor to respective target positions, respectively, the first image in the finder frame still does not satisfy the predetermined Setting a condition, the image capturing apparatus calculates a fourth position of the focus motor, wherein the fourth position is obtained by moving an initial position of the focus motor in a first direction by a first preset value; a preset value is smaller than a focal depth of the focus motor; the image capturing apparatus determines a second object distance according to a fourth position of the focus motor and an initial position of the reference zoom motor; the image capturing apparatus according to the a second object distance and the imaging function determine a third following curve; the image capturing device moves the focus motor to a fourth target position according to the first target position of the reference zoom motor and the third following curve, The definition of the first image in the finder frame is made to satisfy the preset condition.

In the embodiment of the present invention, after the image capturing apparatus moves the target positions of the N variable power motors and the focus motors, if the first image of the image capturing apparatus still does not satisfy the preset condition, the target of the focus motor is illustrated. The position is not suitable, that is, the second following curve is not suitable, and it can be inferred that the first object distance is inaccurate, so the image capturing device can re-determine the second object distance, thereby re-determining the third following curve under the second object distance. Since the second following curve is determined by the image capturing device according to the respective initial positions of the focus motor and the reference zoom motor, the image capturing device can move the focus motor in the first direction based on the initial position to obtain the first preset value. The fourth position then determines a second object distance based on the fourth position of the focus motor and the initial position of the reference zoom motor to determine a third following curve at the second object distance. Therefore, the image capturing apparatus can adjust the target position of the focus motor according to the sharpness of the first image in the finder frame, so that the sharpness of the first image in the finder frame satisfies the preset condition as much as possible, thereby achieving focusing and helping to improve the image. Shooting quality.

In a second aspect, an embodiment of the present invention further provides a synchronization aggregation device, where the synchronization aggregation device includes: N variable magnification motors, a focus motor, a processor, and a stepping motor; the processor and the stepping motor Connecting, the processor is configured to send, to the stepping motor, a target position corresponding to each of the N variable power motors and the gather motor; the stepping motor and the N variable power motors and the focus The motors are respectively connected; the stepping motor is configured to drive the N variable power motors and the focus motor to respectively move to respective corresponding target positions.

In the embodiment of the present invention, the synchronous gathering device includes a focus motor, N variable power motors, a processor, and a stepping motor, wherein the processor is connected to the stepping motor, and the processor can send N changes to the stepping motor. The target motor position corresponding to each of the motor and the concentrating motor; then, the stepping motor drives the N variable power motors and the focus motor to move to respective corresponding target positions. The synchronous focusing device can achieve the purpose of synchronously adjusting the respective positions of the focus motor and the N variable power motors, and has a flexible structural design.

In one possible design, each of the N variable power motors is coupled to a variable power lens group; the zoom lens group is used to scale an image in a viewfinder frame of the synchronous focus device The zoom lens group includes N lenses; the focusing motor is coupled to a focusing lens group, the focusing lens group is for focusing an image in the finder frame; and the focusing lens group includes M lenses, Wherein, N and M are integers greater than or equal to 1.

In the embodiment of the present invention, each motor in the synchronous focusing device has its own function. For example, the movement of the zoom motor can drive the movement of the zoom lens group to change the size of the image in the finder frame, for example, the movement of the focus motor. The movement of the focusing lens group can be driven to focus the image in the framing frame. Therefore, the synchronous focusing device realizes the cooperation between the respective lens groups by moving the positions of the respective motors, thereby contributing to obtaining a higher quality image and improving the user experience.

In a third aspect, an embodiment of the present invention further provides a synchronization focusing device. The synchronous focusing device has the function of realizing an image capturing device in the above method design. These functions can be implemented in hardware or in software by executing the corresponding software. The hardware or software includes one or more units corresponding to the functions described above.

In one possible design, the specific structure of the synchronous focusing device may include an acquisition unit and an adjustment unit. These units may perform the respective functions of the methods provided by any of the possible aspects of the first aspect or the first aspect described above.

In a fourth aspect, an embodiment of the present invention further provides a synchronization focusing device. The synchronous focusing device has the function of realizing an image capturing device in the above method design. These features can be implemented in hardware. The sync focusing device includes a memory for storing computer executable program code, a processor coupled to the memory. Wherein the program code stored in the memory includes instructions that, when executed by the processor, cause the synchronization focusing device to perform the method performed by the image capture device of any of the first aspect or the first aspect of the first aspect described above .

In a fifth aspect, the embodiment of the present invention further provides a computer readable storage medium, where the computer readable storage medium stores instructions, when executed on a computer, causing the computer to perform the synchronous focusing method described in the first aspect above. .

In a sixth aspect, an embodiment of the present invention further provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the synchronous focusing method of the first aspect described above.

DRAWINGS

1 is a structural diagram of an image capturing apparatus according to an embodiment of the present invention;

2 is a flowchart of a method for synchronous focusing according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a (zoom0, zoom1) curve according to an embodiment of the present invention;

4 is a schematic diagram of a (zoom0, focus) curve at different object distances according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a synchronization focusing apparatus according to an embodiment of the present invention; FIG.

FIG. 6 is a schematic structural diagram of another synchronous focusing apparatus according to an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be described below with reference to the accompanying drawings in the embodiments of the present invention.

Hereinafter, some of the terms used in the present invention will be explained so as to be understood by those skilled in the art.

(1) Image capturing device, the image capturing device according to the embodiment of the present invention may be a device capable of image capturing such as a camera, a smart phone, or a video camera, and the image capturing device may collect a still image, a moving image, or a video.

(2) Lens, the lens is a very important part of the image capture device. The lens often includes a plurality of lenses (for example, a concave lens, a convex lens, etc.). Generally, a plurality of lenses in the lens that adjust the focal length are combined into a whole body, which is called a zoom group, and the zoom group corresponds to a zoom motor. The zoom motor adjusts the position of the zoom group and adjusts the magnification. A plurality of lenses that function to adjust imaging are combined into a whole, called a focus group, which also corresponds to a focus motor, by which the position of the focus group is adjusted, thereby adjusting the focus position.

(3) The zoom motor is an indispensable component in an image capturing device (especially a zoomable image capturing device). A plurality of lenses for changing the focal length in the lens of the image capturing apparatus constitute a lens group, and the position of the lens group is moved by the variable magnification motor.

(4) Focusing motor is also an indispensable component in image capturing equipment (especially in zoomable image capturing equipment). A plurality of lenses for changing the distance in the lens of the image capturing apparatus constitute a lens group, and the position of the lens group is moved by the focus motor.

(5) The following curve is a two-dimensional curve. Generally, the abscissa indicates the position of the variable power motor, and the ordinate indicates the position of the focus motor. There is a corresponding curve under different object distances. The principle is that according to the imaging formula 1/f=1/u+1/v (f denotes the position of the zoom motor, that is, the focal length, u denotes the object distance, that is, the distance of the object from the lens, and v denotes the position of the focus motor, that is, the distance) When the object distance u is fixed, f and v have a two-dimensional correspondence relationship, and the position of the variable power motor, that is, the value of the focal length f is represented by the abscissa, and the position of the focus motor, that is, the value of the distance v, is represented by the ordinate. Corresponding two-dimensional relationship curves of f and v under different object distances, that is, following curves, can be obtained.

In the embodiment of the present invention, the "following curve" may also be referred to as "shot curve", "lens following curve", "corrected zoom following curve", and the like. That is to say, the name of the "following curve" is not limited herein, as long as the above concept is expressed.

(6) The term “and/or” in this document is merely an association relationship describing an associated object, indicating that there may be three relationships, for example, A and/or B, which may indicate that A exists separately, and A and B exist simultaneously. There are three cases of B alone. In addition, the character "/" in this article, unless otherwise specified, generally indicates that the contextual object is an "or" relationship. In the description of the present invention, the terms "first", "second" and the like are used to distinguish the purpose of the description, and are not to be construed as indicating or implying relative importance, nor in the order of indication or suggestion.

Current image capture devices include only a single zoom group and a single focus group, ie, only one zoom motor and one focus motor. It can be seen that the structure of the lens in the current image capturing device is relatively simple, and the movement of the zoom group or the focus group is not flexible enough.

In order to solve this technical problem, an embodiment of the present invention provides a synchronous focusing method. This method is suitable for use in image capture devices. Fig. 1 shows a structural diagram of a possible image capturing apparatus. Referring to FIG. 1 , the image capturing apparatus 100 includes a lens 110 , an image sensor 120 , an image processing (ISP) chip 130 , a processor 140 , and a stepping motor 150 . A zoom motor 151, a second zoom motor 152, a third zoom motor 153, and a focus motor 154.

The process of acquiring an image by the image capturing apparatus 100 will be described below with reference to FIG. 1 as follows:

The lens 110 in the image capturing apparatus 100 collects an optical signal of an object in the environment, and transmits the collected optical signal to the image sensor 120, and the image sensor 120 processes the acquired optical signal into electrical information, and transmits the electrical signal to the ISP 130. The ISP 130 processes the electrical signal to obtain an image of the object, and the ISP 130 can also determine an evaluation value of the sharpness of the image and send the image and the sharpness evaluation value together to the processor 140. The processor 140 determines the target position of each motor in the lens 110 according to the obtained evaluation value of the sharpness, and then issues the determined target position of each motor to the stepping motor 150, and the stepping motor 150 respectively moves the respective motors. Go to their respective target locations. For example, the stepping motor 150 moves the first variable power motor 151 to its own corresponding target position, moves the second variable power motor 152 to its own corresponding target position, and moves the third variable power motor 153 to its own corresponding position. The position moves the focus motor to its own corresponding target position.

In the image capturing apparatus shown in FIG. 1, the ISP 130 and the processor 140 are two different components. In actual operation, the ISP 130 can also be integrated into the processor 140, that is, only one component can be used. A person skilled in the art can make a specific limitation according to the actual situation, and the embodiment of the present invention does not specifically limit this.

In the image capturing apparatus shown in FIG. 1, the first variable power motor 151, the second variable power motor 152, and the third variable power motor 153 are respectively connected to a concave lens, and FIG. 1 is only for ease of understanding, in actual operation, the first The zoom motor 151 can also be connected to a plurality of lenses (convex lenses or concave lenses), that is, the first zoom motor 151 can be connected to a lens group, that is, the zoom group, the same, the second zoom motor 152, the third change The double motor 153 and the focus motor 154 can each be connected to a lens group. For example, the second zoom motor 152 is connected to the zoom2 group, the third zoom motor is connected to the zoom3 group, and the focus motor 154 is connected to the focus group. In this way, each motor can move the corresponding lens group together.

A person skilled in the art may understand that the structure of the image capturing apparatus shown in FIG. 1 does not constitute a limitation on the terminal device, and the image capturing apparatus provided by the embodiment of the present invention may include more or less components than illustrated, or Combining certain components, or different component arrangements, such as image capture devices, may also include more variable power motors and the like.

FIG. 2 is a flowchart of a synchronous focusing method according to an embodiment of the present invention, which is applicable to the image capturing apparatus 100 shown in FIG. 1. Therefore, in the following description, the method is applied to the image capturing apparatus 100 shown in FIG. 1 as an example. Referring to Figure 2, the process of the method is described as follows:

S201: The image capturing device acquires the first image in the finder frame during the zoom shooting.

In the embodiment of the present invention, the finder frame may be a component for presenting a preview image in the image capturing apparatus, and the preview image may be an image of the object to be photographed. In different image capturing devices, the finder frame is also different. If the image capturing device is a mobile phone, the finder frame is located in the display screen of the mobile phone. If the image capturing device is a camera, the finder frame is located in the viewfinder of the camera.

S202: The image capturing device respectively adjusts the respective positions of the N variable power motors and the focus motors in the frame, so that the sharpness of the first image in the finder frame satisfies a preset condition to achieve focusing; wherein N is an integer greater than or equal to 2.

In the embodiment of the present invention, the image capturing apparatus is provided with a focus motor and N variable magnification motors, and during zooming, the position of each of the focus motor and the N variable magnification motors is adjusted to make the frame of the image capturing apparatus The resolution of the image satisfies the preset condition, and solves the technical problem that the structure of the lens in the current image capturing device is too simple, and at the same time helps to improve the image quality of the image capturing device.

A possible implementation manner is that each motor (N variable power motors, focus motors) in the image capturing device can be interlocked with each other, for example, the image capturing device determines the first target position of the reference zoom motor in the N variable power motors. Then, the respective positions of the other N-1 variable power motors and the focus motors are determined according to the first target position of the reference zoom motor. Therefore, in S202, the image capturing apparatus can be performed in three steps. In the first step, the image capturing apparatus determines the first target position of the reference zoom motor in the N variable magnification motors. In the second step, the image capturing apparatus determines the respective target positions of the other N-1 variable power motors and the focus motors respectively according to the first target position of the reference zoom motor. In the third step, the image capturing apparatus moves the N variable power motors and the focus motor to respective target positions.

In the embodiment of the present invention, the image capturing apparatus includes N (N is an integer greater than or equal to 2) variable magnification motors, and the image capturing apparatus may determine the reference zoom motor from the N variable power motors in various manners, for example, Randomly selected, or the image capturing device determines the reference zoom motor according to the position of the N variable power motors, for example, the first zoom motor located near the forefront of the lens is the reference zoom motor, or is located furthest from the front of the lens A variable-magnification motor is used as the reference zoom motor, and one of the N variable-magnification motors can be determined as a reference zoom motor according to the actual situation, which is not specifically limited in the embodiment of the present invention. After the image capturing apparatus determines the reference zoom motor, the implementation of the first step in S202 is described below.

In the embodiment of the present invention, before adjusting the respective positions of the focus motor and the N variable power motors, the image capturing apparatus can receive the zoom instruction through its own input part, that is, the zoom shooting process starts, and the zoom instruction includes the change. Double rate.

As already mentioned, in the embodiment of the invention, the image capturing device may be a camera, a mobile phone, a video camera or the like. The input components used to input the zoom instruction in different types of image capturing devices are often different. If the image capturing device is a mobile phone, the touch screen, the volume button, etc. in the mobile phone can be used as input components to input the zoom instruction, if the image capturing device is In the camera, the zoom ring in the camera can be used as an input component to input a zoom command. The specific structure of the input component is not limited in the embodiment of the present invention, and can be determined by those skilled in the art according to actual conditions.

As an example, taking the image capturing device as a mobile phone as an example, when the user takes an image, the camera in the mobile phone can be opened. At this time, the preview image is displayed in the finder frame, and the user can zoom the preview image through the finger, and the touch screen detects The rate of movement of the user's finger, which in turn determines the zoom rate, results in an image capture device having a zoom command that includes a zoom rate.

As another example, the image capturing apparatus may set a fixed zoom rate in advance, for example, setting a zoom ratio at the time of zooming, and a zoom ratio at the time of zooming, if the image capturing apparatus determines a zoom instruction input by the user through the input section. Is the enlargement command, then the image capture device defaults to the zoom ratio at the time of zooming to the final zoom rate. If the image capture device determines that the zoom command input by the user through the input component is a zoom instruction, the image capture device defaults. The zoom rate at the time of reduction set in advance is the final zoom rate. Of course, the zoom rate at the time of zooming and the zoom rate at the time of zooming may be the same or different, and may be determined by a person skilled in the art according to the specific situation, which is not specifically limited in the embodiment of the present invention.

As another example, since the image capturing apparatus has a plurality of variable power motors, the image capturing apparatus can acquire the moving speed of each variable power motor, for example, the moving speed of the first variable power motor is the first moving speed, and the second The moving speed of the zoom motor is the second moving speed or the like. After the image capturing apparatus receives the zoom command through its own input unit, the first moving speed of the first zoom motor may be used as the zoom rate, or the second moving speed of the second zoom motor may be used as the zoom rate. For example, when the zoom instruction received by the image capture device through the input component is an enlargement command, the image capture device uses the first movement rate of the first zoom motor as a zoom rate, and the zoom received by the image capture device through the input component When the instruction is a reduction instruction, the image capturing apparatus uses the second moving rate of the second zoom motor as the zoom rate. Similarly, the first moving rate and the second moving rate may be the same or different, which is not specifically limited in this embodiment of the present invention.

In the first step, after the image capturing device receives the zoom instruction through the input component, that is, after the zoom shooting starts, the image capturing device can acquire the initial position of the reference zoom motor. Of course, during the actual operation, the image capturing device It is also possible to obtain the initial positions of the N-1 variable-magnification motors other than the reference zoom motor among the N variable-magnification motors for use, and the specific use process will be described later.

As an example, in the first step, the image capturing apparatus may use the position at which the reference zoom motor is in the previous zoom shooting as the initial position of the reference zoom motor during the zoom shooting.

As another example, in the first step, the image capturing apparatus may perform a reset operation on the reference zoom motor. The specific process may be that the image capturing apparatus may set the initial position of the reference zoom motor in advance, when the zoom shooting starts. The image capturing device acquires the current position of the reference zoom motor. If the position of the reference zoom motor is currently equal to the initial position set in advance, the image capturing device does not need to reset the reference zoom motor if the reference zooms The position where the motor is currently located is not equal to the initial position set in advance, and the image capturing apparatus performs a reset operation on the reference zoom motor, that is, the reference zoom motor is moved to the initial position set in advance. In this way, the initial position of the reference zoom motor is fixed every time the image capture device starts zooming, regardless of the position of the reference zoom motor in the previous zoom shooting, as long as the new change The multiple shooting process begins and the initial position of the reference zoom motor is at a fixed position. In this case, the initial position of the reference zoom motor may be set in advance, and the specific value may be determined by a person skilled in the art according to the actual situation, and is not specifically limited in the embodiment of the present invention.

Therefore, in the first step, after receiving the zoom instruction, the image capturing apparatus may determine the first preset time according to the zoom rate included in the zoom instruction and the initial position of the reference zoom motor that has been acquired. The first target position of the zoom motor, that is, the product of the zoom rate and the first preset time.

As an example, the image capturing apparatus may set a specific value of the first preset time in advance. In the actual operation process, when the user adjusts the size of the preview image through the input component, it is often a continuous action. Taking the image capturing device as a mobile phone as an example, when the user zooms in on the preview image by fingers, it often lasts for 2-3 seconds. , or more time, therefore, the first preset time in S203 may be a certain time in the process of zooming the preview image by the finger, for example, the mobile phone detects that the user's finger starts to preview the image at 00:00:10mine. Zoom in, then the first preset time can be 00::00:12mine, or 00::00:11mine, that is, when the mobile phone detects that the user's finger starts to zoom in on the preview image, it can predict the first preset at the next moment. The first target position of the reference zoom motor after time. In this manner, the image capturing apparatus can adjust the first target position of the reference zoom motor in real time during the process of adjusting the size of the preview image by the user, thereby adjusting the target position of the other motors, and ensuring that the user adjusts the preview image as much as possible. The entire image is always clearer in the process of size.

As another example, the image capturing apparatus may record the input time of the zoom instruction and the stop time of the zoom instruction, and use the difference between the two as the first preset time, for example, the image capturing device is a mobile phone, and the mobile phone detects When the user's finger starts to enlarge the preview image at 00:00:10mine, and detects that the user's finger stops zooming at 00::00:13mine, the image capturing apparatus determines that the first preset time is 3 seconds. In this way, the operation is relatively simple, the image capturing device can save a certain processing process, and can ensure that the entire image is clear when the user stops zooming.

During the actual operation, a person skilled in the art may combine the two methods for determining the first preset time, or may also use other manners to determine the first preset time, which is not specifically implemented by the embodiment of the present invention. limited.

After the image capturing apparatus determines the first preset time, the product of the first preset time and the zooming rate is obtained, and the product is the first target position of the reference zoom motor. Then, the image capturing apparatus performs the second step in S202, that is, the image capturing apparatus determines the target positions of the other N-1 variable power motors and the target position of the focus motor in accordance with the first target position of the reference zoom motor. The first process of determining the target position of the other N-1 zoom motors according to the first target position of the reference zoom motor by the image capturing apparatus and the image capturing apparatus determining the focus according to the first target position of the reference zoom motor will be separately described below. The second process of the motor's target position. The first process and the second process are distinguished here only for the convenience of understanding, and are not limited to the chronological order of the two processes. In the actual operation process, the two processes can be performed simultaneously or at different times. The embodiment of the invention is not specifically limited.

The first process, that is, after the image capturing apparatus determines the first target position of the reference zoom motor at the first preset time, the target position of the other N-1 zoom motors can be further determined. The first target position of the double motor determines the implementation of the target positions of the other N-1 variable power motors:

In a first implementation manner, the image capturing apparatus determines a second target position of the first zoom motor according to the first target position of the reference zoom motor and the first following curve, and the first zoom motor is another N-1 zoom motor In any one of the motors, the first following curve is used to indicate the positional relationship between the reference zoom motor and the first zoom motor.

To adopt the first implementation, firstly, the first following curve needs to be obtained. The following describes the process of determining the first following curve by the image capturing device, which is described as follows:

In the embodiment of the present invention, the image capturing device can design the position of the N variable-magnification motors before leaving the factory, because the process of capturing images by the image capturing device is actually the optical imaging process of the lens, and the lens Multiple lenses are included, and the optical imaging process is actually the process of imaging the light through each lens to the imaging point. Therefore, in the process of designing each lens in the lens, the designer can experimentally determine at which position of each of the N variable-magnification motors, the imaging point is clear, the designer can each The position of the zoom motor is recorded. For example, taking an image capturing device with three zoom motors as an example, after the designer sets the reference zoom motor at the first position, the optimal position of the first zoom motor can be found, so that the first zoom motor At the optimal position, when the light passes through the reference zoom motor and the first zoom motor, the image is more clearly imaged, and after finding the optimal position of the first zoom motor, the second zoom motor can be continuously searched. The optimal position is such that after the light passes through the reference zoom motor, the first zoom motor and the second zoom motor, the image is more clearly imaged. Of course, the foregoing is only an example. In actual operation, the designer can also obtain the optimal position of each variable motor according to other methods.

The designer can record the first position of the reference zoom motor, the optimal position of the first zoom motor, and the optimal position of the second zoom motor. For example, the designer can mark the first position of the reference zoom motor and the optimal position of the first zoom motor in the first two-dimensional coordinate system, and the abscissa of the two-dimensional coordinate system can represent the reference zoom. The position of the motor and the ordinate indicate the position of the first zoom motor. Of course, the abscissa indicates the position of the first zoom motor, and the ordinate indicates the position of the reference zoom motor. Similarly, the designer can also mark the first position of the reference zoom motor and the optimal position of the second variable power motor in a second two-dimensional coordinate system, and the abscissa of the two-dimensional coordinate system can represent the reference zoom. The position of the motor, the ordinate may indicate the position of the second variable power motor, and the abscissa may indicate the position of the second variable power motor, and the ordinate indicates the position of the reference zoom motor.

Then, the designer can adjust the reference zoom motor from the original first position to the second position. Since the position of the reference zoom motor changes, in order to ensure that the imaging at the imaging point is clear, the designer needs to find the first. The optimal position of a variable motor and the optimal position of the second variable motor. That is, each time the designer changes the position of the reference zoom motor, the optimal position of the first zoom motor and the second zoom motor can be re-determined. At this point, the designer can mark the second position of the reference zoom motor and the new optimal position of the first zoom motor in the first two-dimensional coordinate system mentioned above, and can also convert the reference zoom motor. The new position of the second position and the second variable power motor is indicated in the second two-dimensional coordinate system mentioned above. In this case, each time the designer changes the position of the reference zoom motor, the new optimal position of the first zoom motor and the second zoom motor is obtained, and the designer will mark the point obtained each time in the corresponding coordinate system. In this way, there will be a series of points in the two-dimensional coordinate system, and these points will get a curve. The curve obtained in the first two-dimensional coordinate system can be called (zoom0, zoom1) curve, where zoom0 represents The reference zoom motor, zoom1 represents the first zoom motor, and the (zoom0, zoom1) curve is used to indicate the positional relationship between the reference zoom motor and the first zoom motor. Similarly, the curve obtained in the second two-dimensional coordinate system may be referred to as a (zoom0, zoom2) curve, wherein zoom0 represents a reference zoom motor, zoom2 represents a second zoom motor, and the (zoom0, zoom2) curve is It is used to indicate the positional relationship between the reference zoom motor and the second zoom motor.

After the designer gets the (zoom0, zoom1) curve, (zoom0, zoom1) curve, these curves can be stored in the image capture device for use. 3 shows a schematic diagram of the first following curve. In FIG. 3, the (zoom0, zoom1) curve and the (zoom0, zoom1) curve are in the same two-dimensional coordinate system, and the abscissa is the position of the reference zoom motor, and the ordinate. It is the position of the first zoom motor or the second zoom motor.

Therefore, in the first implementation manner, after the image capturing apparatus determines the first target position of the reference zoom motor, the second target position of the first zoom motor can be obtained according to the (zoom0, zoom1) curve. The third target position of the second zoom motor is obtained according to the (zoom0, zoom1) curve. For example, please continue to refer to FIG. 3, the first target position of the reference zoom motor is 26, that is, the abscissa is 26, and the second target position of the first zoom motor is determined to be 5 according to the (zoom0, zoom1) curve. The third target position of the second zoom motor is determined to be 20 according to the (zoom0, zoom1) curve.

At least the case where the image capturing apparatus has three variable power motors is described above, and the case where the image capturing apparatus has more variable power motors is similar, that is, the image capturing apparatus stores N-1 curves, and each curve represents a reference. A positional relationship curve between the variable power motor and one of the other N-1 variable power motors. After the image capturing device determines the first target position of the reference zoom motor, the N-1 curve can be determined according to the N-1 curve. The target positions of the other N-1 variable power motors are determined one by one.

In a second implementation manner, the image capturing apparatus first determines a second target position of the first zoom motor according to the first target position of the reference zoom motor and the first following curve; and then, the image capturing apparatus is configured according to the first zoom motor The two target positions respectively determine the target positions of each of the N-1 variable power motors other than the first variable power motor.

In this manner, the manner in which the image capturing apparatus determines the second target position of the first zoom motor based on the first target position of the reference zoom motor and the first following curve may be similar to the case in the first implementation. The first zoom motor here may be any one of the other N-1 variable power motors. After the image capturing apparatus determines the second target position of the first zoom motor, the target positions of the other N-2 zoom motors may be respectively determined according to the second target position of the first zoom motor.

As mentioned in the previous introduction, the designer can mark the position of the reference zoom motor and the position of the second zoom motor in a two-dimensional coordinate system. In fact, the designer can also position the first zoom motor. And the position of the second variable power motor is marked in a third two-dimensional coordinate system, in which the abscissa can represent the position of the first zoom motor and the ordinate can represent the second reference zoom motor The position, that is, the curve obtained in the third two-dimensional coordinate system is a (zoom1, zoom2) curve, wherein zoom1 represents the first zoom motor, zoom2 represents the second zoom motor, and the (zoom1, zoom2) curve is used. The positional relationship between the first zoom motor and the second zoom motor is indicated.

Therefore, in the second mode, the image capturing apparatus can determine the second target position of the first zoom motor according to the first target position of the reference zoom motor and the (zoom0, zoom1) curve, and then, according to the first zoom motor The second target position and (zoom1, zoom2) curve determine the third target position of the second zoom motor, and so on, and the target positions of the other N-2 zoom motors are derived.

The above only enumerates two implementation manners for determining the target position of the other N-1 variable power motors according to the first target position of the reference zoom motor by the image capturing device. In the actual operation process, there may be other implementation manners. The embodiment of the invention is not specifically limited thereto.

In practical applications, the lens of the image capturing apparatus usually includes an concentrating motor, and the image capturing apparatus moves the position of the focusing lens by the concentrating motor, thereby changing the distance, so that the image quality of the image at the imaging point is better, for example, the sharpness is better. high. The following describes a process in which the image capturing apparatus determines the target position of the focus motor, that is, the second process of S202, in which the image capturing apparatus determines the target position of the focusing motor based on the first target position of the reference zoom motor.

In a first implementation manner, after determining the first target position of the reference zoom motor, the image capturing apparatus may determine the third target position of the focus motor according to the first target position and the second following curve of the reference zoom motor, where The second following curve is used to indicate the positional relationship between the reference zoom motor and the focus motor. The process of determining the second following curve by the image capturing apparatus will be described below.

As an example, the image capturing apparatus may acquire an initial position of the focusing motor, and then the image capturing apparatus may determine the first object distance according to the initial position of the reference zoom motor, the initial position of the focusing motor, and the imaging formula, and the imaging formula is as follows:

Where f represents the focal length, ie the position of the reference zoom motor, and v represents the distance, ie the position of the focus motor. u represents the object distance, which is the distance between the object and the lens. The initial position of the reference zoom motor is denoted by f ₀ , the initial position of the concentrating motor is denoted by v ₀ , and f0 and v0 are brought into the above imaging formula to obtain the first object distance u0, thereby obtaining the reference at the first object distance u0. The zoom (zoom0, focus) curve of the zoom motor and the gather motor, ie

After the image capturing device calculates the (zoom0, focus) curve of the first object distance u ₀ , the focus can be determined according to the first target position of the reference zoom motor and the (zoom0, focus) curve of the first object distance u ₀ . The third target position of the motor. 4 shows a (zoom0, focus) curve at a first object distance u ₀ . In the two-dimensional coordinate system shown in FIG. 4 , the abscissa represents the position of the reference zoom motor, and the ordinate represents the position of the gather motor, the image After the photographing device determines the value of the first target position of the reference zoom motor, that is, the abscissa, the value of the third target position, that is, the ordinate, of the gather motor is determined according to the (zoom0, focus) curve at the first object distance u ₀ .

The image capturing apparatus may further determine whether the target position of the concentrating motor is an optimal position, for example, after the image capturing apparatus determines the target positions of the respective zoom motor and the concentrating motor, each zoom motor and the concentrating motor may be moved to respective targets. Positioning, then, the image capturing apparatus may determine whether the sharpness of the first image in the finder frame satisfies a preset condition, and if so, the image capturing apparatus determines that the target position of the gathering motor is the optimal position, if not, then The image capturing device needs to recalculate the (zoom0, focus) curve of the new object distance according to the (zoom0, focus) curve of the first object distance u ₀ (the zoom target is not suitable). . The following describes how the image capture device recalculates the (zoom0, focus) curve at the new object distance.

As an example, as mentioned above, the image capturing apparatus calculates the (zoom0, focus) curve of the first object distance u ₀ by the initial position f _{0 of the} reference zoom motor and the initial position v _{0 of the} gather motor. Calculated, when the image capturing device recalculates the (zoom0, focus) curve under the new object distance, the initial position v ₀ of the collecting motor can be changed according to the first direction to a preset value to obtain a new position of the collecting motor. Expressed by v ₁ , the preset value mentioned here may be any value less than or equal to the depth of focus of the collecting motor. After the image capturing apparatus determines the new position of the gathering motor, that is, v ₁ , the second object distance u ₁ , that is, v ₁ and f ₀ , can be obtained according to the initial position f _{0 of the} reference zoom motor and the new position v _{1 of the} collecting motor and the imaging formula. Bring into the imaging formula to obtain the second object distance u _1, and then obtain the (zoom0, focus) curve of the second object distance u ₁ , ie

After the second image pickup apparatus to give the object distance u ₁ (zoom0, focus) curve, at _a distance u can (zoom0, focus) the reference target position in accordance with a first motor and a second variator curve was again determined aggregate motor The fourth target position. Please continue to refer to FIG. 4, after the image capturing apparatus determines the first target position of the reference zoom motor, that is, the value of the abscissa, the first step of determining the gather motor according to the (zoom0, focus) curve of the second object distance u ₁ The value of the four target positions and the ordinate.

Of course, the image capturing apparatus can determine again whether the target position of the focus motor is the optimal position, that is, the image capturing apparatus can again determine whether the sharpness of the first image in the finder frame satisfies a preset condition, and if not, the image is illustrated. The photographing device determines that the fourth target position of the gather motor is not suitable according to the (zoom0, focus) curve of the second object distance u ₁ , and the image photographing device needs to recalculate the (zoom0, focus) curve under the new object distance again. The process may be: the image capturing device changes the initial position v _{0 of the} collecting motor according to the second direction (the direction opposite to the first direction) by a preset value to obtain a new position of the collecting motor, denoted by v ₂ , mentioned here The preset value may be equal to or less than the focal depth of the concentrating motor. After the image capturing apparatus determines the new position of the concentrating motor, that is, v ₂ , the third object distance u ₂ , that is, v ₂ and f ₀ , may be obtained according to the initial position f _{0 of the} reference variator motor, the new position v _{2 of the} concentrating motor, and the imaging formula. Bringing into the imaging formula, the third object distance u _{2 is} obtained, and then the (zoom0, focus) curve of the third object distance u ₂ is obtained, that is,

After the third image pickup apparatus to give the object distance u ₂ (zoom0, focus) curves, the distance u ₂ according to the first target position and the third reference was zooming motor (zoom0, focus) motor aggregation curve redetermined The fifth target position. Please continue to refer to FIG. 4, after the image capturing apparatus determines the first target position of the reference zoom motor, that is, the value of the abscissa, the fifth of the gather motor can be determined according to the (zoom0, focus) curve of the third object distance u2. The value of the target position and the ordinate.

The image capturing apparatus mentioned above changes the initial position of the focus motor in a first direction or a second direction to change a preset value. Please continue to refer to FIG. 4. In FIG. 4, the ordinate represents the position of the focus motor, and the first direction may be vertical. The direction in which the coordinates increase is the near direction, then the second direction, that is, the direction in which the ordinate decreases, that is, the far direction, or vice versa, that is, the first direction is the far direction, and the second direction is the near direction.

The image capturing apparatus mentioned above can determine whether the sharpness of the first image in the finder frame satisfies a preset condition. The following describes a process in which the image capturing apparatus determines whether the sharpness of the first image satisfies a preset condition.

As an example, the image capture device stores the sharpness standard value in advance, and when the sharpness of the first image in the finder frame is greater than or equal to the sharpness standard value, it is determined that the preset condition is satisfied.

As another example, since the image capturing apparatus changes the first image in real time during the zoom shooting process, for example, gradually zooming in or out, the image capturing apparatus adjusts the position of the focus motor one time. Recording the sharpness of the first image in the framing frame, and comparing the sharpness of the recorded first image with the sharpness of the second image in the framing frame after the position of the focus motor was last adjusted, if the second The sharpness of the image is smaller than the sharpness of the first image, indicating that the target position of the focus motor determined by the image capturing device is suitable for the second time. If the sharpness of the second image is greater than the sharpness of the first image, the image is taken. The target position of the focus motor determined by the device for the second time is not suitable. If the first and second times are to adjust the position of the focus motor in the first direction, then the second direction (and the first direction) may be followed. Instead, adjust the target position of the focus motor.

For example, the image capturing apparatus acquires the first image in the framing frame at the start of the zooming, and when the image capturing apparatus moves the respective target positions of the respective zoom motor and the focus motor to the respective target positions, respectively, the image at this time The photographing device can acquire the second image in the framing frame again. If the sharpness of the second image is greater than the sharpness of the first image, the adjustment of the position of the focus motor by the image capturing device is appropriate, if the sharpness of the second image is Less than the sharpness of the second image, the adjustment of the position of the focus motor by the image capture device is not appropriate, and the image capture device can continue to adjust the position of the focus motor such that the sharpness of the second image is greater than the first image.

A second implementation manner, as mentioned above, the image capturing apparatus may determine the second target position of the first zoom motor according to the first target position of the reference zoom motor and the first following curve; the first following curve is used to indicate a positional relationship between the reference zoom motor and the first variable power motor; the first variable power motor is any one of the N-1 variable power motors; therefore, the image capturing device determines the first zoom motor After the second target position, the third target position of the focus motor may also be determined according to the second target position of the first zoom motor and the second following curve, where the second following curve is used to indicate the first zoom motor and the focus motor The positional relationship between.

In the second mode, the manner in which the image capturing device determines the second following curve is similar to the manner in which the second following curve is determined in the first mode. For the sake of brevity of the description, no further details are provided herein.

Therefore, the image capturing apparatus may determine the target position of the concentrating motor according to the first target position of the reference variator motor, and may first determine any one of the other N-1 variator motors according to the first target position of the reference variator motor. The second target position of the motor is then determined, and then the target position of the concentrating motor is determined according to the determined second target position of any of the variator motors. After the image capturing apparatus obtains the target position of the focus motor, the N variable power motors (the respective target positions of the N variable power motors have been determined in the first process) and the focus motor can be respectively moved to the respective target positions.

It should be noted that, as already mentioned, the image capturing apparatus can determine whether the target position of the focus motor is the optimal position, and can respectively move the N variable power motors to the determined target position of each variable power motor. And then determining whether the target position of the focus motor is the optimal position by judging the sharpness of the first image in the framing frame, so if the image capturing apparatus has experienced a process of determining whether the target position of the focus motor is the optimal position , indicating that the N variable-magnification motors have moved to their respective target positions, and only need to move the focus motor to its own target position.

As an example, the image capturing apparatus may send the target positions of the N variable power motors and the focus motor to the stepping motor, and the stepping motor drives the N variable power motors and the focus motor to move respectively, so that the N variable power motors are respectively Move to the respective target position simultaneously with the focus motor.

In the prior art, the image capturing apparatus determines the position of the focus motor as a process in which a zoom (zoom, focus) curve under different object distance curves is stored in advance, and after the image capturing apparatus determines the target position of the zoom motor, Find the appropriate (zoom0, focus) curve in the (zoom0, focus) curve of all the different object distances stored in advance. For example, the image capturing equipment stores the object distances of 5, 8, and 10 meters respectively. (zoom0, focus) curve, after the image capturing device determines the target position of the zoom motor, it can only find the best (zoom0, focus) curve among the three curves, but in fact, these three (zoom0, focus) curves correspond to The granularity between the object distances is large. For example, when the image capturing device switches from the (zoom0, focus) curve with the object distance of 8 to the (zoom0, focus) curve with the object distance of 5, the object distance is missed by 5-8. The (zoom0, focus) curve between the other object distances, so the position of the determined focus motor is inaccurate due to the inaccurate (zoom0, focus) curve.

In the embodiment of the present invention, the image capturing apparatus is provided with N variable magnification motors, and the image capturing apparatus can respectively determine the respective targets of the other N-1 variable power motors and the focus motors according to the reference variable power motors of the N variable power motors. Position, and in the process of determining the target position of the focus motor, the image capturing device can calculate the (zoom0, focus) curve under different object distances in real time, and each time the object distance is calculated, the current position of the focus motor is changed less than The preset value of the depth of focus obtains a new position, and then according to the new position and the current position of the reference zoom motor, a relatively accurate new object distance is obtained, and then the (zoom0, focus) curve of the object distance is obtained. Further, after obtaining the (zoom0, focus) curve of the new object distance, the image capturing device can determine whether the target position of the focus motor obtained by the object distance (zoom0, focus) curve is appropriate, and if not, it can be re The object distance and the (zoom0, focus) curve of the object distance are calculated, that is, the target position of the focus motor is re-determined until the determined target position of the focus motor is appropriate. Therefore, in the embodiment of the present invention, the image capturing device can accurately determine the (zoom0, focus) curve under the optimal object distance, thereby more accurately determining the target position of the focus motor, and contributing to the improvement of the image capturing device. The quality of the image taken.

In summary, in the embodiment of the present invention, the image capturing apparatus is provided with a focus motor and N variable power motors, and the image capturing apparatus is adjusted by adjusting the respective positions of the focus motor and the N variable power motors during the zoom shooting process. The resolution of the image in the framing frame satisfies the preset condition, which solves the technical problem that the lens structure in the current image capturing device is too simple, and at the same time helps to improve the image quality of the image capturing device.

The device provided by the embodiment of the present invention is described below with reference to the accompanying drawings.

FIG. 5 shows a schematic structural view of a synchronous focusing device 500. The synchro focus device 500 can implement the functions of the image capture device referred to above. The synchronization focusing device 500 can include an obtaining unit 501 and an adjusting unit 502. The obtaining unit 501 can be used to execute S201 in the embodiment shown in FIG. 2, and/or other processes for supporting the techniques described herein. Adjustment unit 502 can be used to perform S202 in the embodiment shown in FIG. 2, and/or other processes for supporting the techniques described herein. All the related content of the steps involved in the foregoing method embodiments may be referred to the functional descriptions of the corresponding functional modules, and details are not described herein again.

It should be noted that, in the embodiment of the present invention, the image capturing apparatus described above is displayed in the form of a functional unit. The term "unit" as used herein, without limitation, may refer to an application-specific integrated circuit (ASIC), electronic circuit, (shared, dedicated, or group) that executes one or more software or firmware programs. A processor and memory, combinational logic, and/or other suitable components that provide the described functionality.

In a simple embodiment, those skilled in the art will appreciate that the synchronous focus device 500 can also be implemented by the structure shown in FIG.

As shown in FIG. 6, the sync focus device 600 can include a memory 601, a processor 602, and a bus 603. Processor 601 and processor 602 can be coupled by bus 603. The memory 601 is configured to store computer execution instructions. When the synchronous focus device 600 is in operation, the processor 602 executes computer execution instructions stored in the memory 601 to cause the synchronous focus device 600 to perform the synchronous focus method provided by the embodiment shown in FIG. . For a specific synchronous focusing method, reference may be made to the related descriptions in the above and the drawings, and details are not described herein again.

In the embodiment of the present invention, the processor 602 may be a field-programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), and a central unit. Central processor unit (CPU), network processor (NP), digital signal processor (DSP), microcontroller (micro controller unit (MCU), programmable controller (programmable logic device, PLD) or other integrated chip. The bus 603 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus or the like. The bus 603 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 6, but it does not mean that there is only one bus or one type of bus.

In summary, the embodiments of the present invention provide a synchronization focusing method and apparatus. In the method, the image capturing apparatus is provided with a focus motor and N variable magnification motors, and the image of the framing frame of the image capturing apparatus is adjusted by adjusting the respective positions of the focus motor and the N variable magnification motors during the zoom shooting process. The resolution meets the preset conditions, which solves the technical problem that the structure of the lens in the current image capturing device is too simple, and at the same time helps to improve the image quality of the image capturing device.

In the above described embodiments of the invention, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present invention are generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another readable storage medium, for example, the computer instructions can be passed from a website site, computer, server or data center Wired (eg, coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.) to another website site, computer, server, or data center. The computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media. The usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)) or the like.

The above embodiments are only used to describe the technical solutions of the embodiments of the present invention, but the description of the above embodiments is only used to help understand the method and the core ideas of the embodiments of the present invention, and should not be construed as limiting the present application. Those skilled in the art, within the scope of the technical scope of the present invention, are susceptible to variations and substitutions within the scope of the present invention.

Claims

A synchronous focusing method, comprising:

During the zoom shooting process, the image capturing device acquires the first image in the finder frame;

The image capturing device respectively adjusts the respective positions of the N variable power motors and the focus motors in the frame, so that the sharpness of the first image in the finder frame satisfies a preset condition to achieve focusing; wherein N is greater than or equal to 2 Integer.
The method according to claim 1, wherein the image capturing apparatus respectively adjusts respective positions of the N variable power motors and the focus motors in the self, including:

The image capturing apparatus determines a first target position of the reference zoom motor in the N variable power motors;

The image capturing apparatus respectively determines a target position of each of the other N-1 variable power motors and the focus motor according to the first target position of the reference zoom motor;

The image capturing apparatus moves the N variable power motors and the focus motor to respective target positions.
The method according to claim 2, wherein the image capturing apparatus determines the target positions of the other N-1 variable power motors according to the first target position of the reference zoom motor, respectively, including:

Determining, by the image capturing device, a second target position of the first zoom motor according to the first target position of the reference zoom motor and the first following curve; the first zoom motor is the N-1 zoom a motor of any one of the motors, wherein the first following curve is used to indicate a positional relationship between the reference zoom motor and the first zoom motor.
The method according to claim 2, wherein the image capturing apparatus determines the target positions of the other N-1 variable power motors according to the first target position of the reference zoom motor, respectively, including:

The image capturing apparatus determines a second target position of the first zoom motor according to the first target position of the reference zoom motor and the first following curve; the first following curve is used to indicate the reference zoom motor and a positional relationship between the first variable power motors; the first variable power motor is any one of the N-1 variable power motors;

The image capturing apparatus determines a target position of each of the N-1 variable power motors other than the first variable power motor according to a second target position of the first variable power motor.
The method of any of claims 2-4, wherein before the image capturing device acquires the image in the framing frame, the method further comprises:

The image capturing device receives a zoom instruction through its own input component;

The image capturing apparatus determines a first target position of the reference zoom motor in the N variable power motors, including:

The image capturing apparatus acquires an initial position of a reference zoom motor in the N variable power motors; N is a positive integer greater than or equal to 2;

The image capturing apparatus determines a first target position of the reference zoom motor at a first preset time based on a zoom rate included in the zoom command and the initial position.
The method of any of claims 3-5, wherein the image capturing device determines a target position of the focus motor based on the first target position of the reference zoom motor, comprising:

The image capturing apparatus determines a third target position of the focus motor according to a first target position and a second following curve of the reference zoom motor, the second following curve is used to indicate the reference zoom motor and the The positional relationship between the focus motors, or

The image capturing apparatus determines a third target position of the focus motor according to a second target position of the first zoom motor and a second following curve, the second following curve is used to indicate the first zoom motor A positional relationship with the focus motor.
The method according to claim 6, wherein said said image capturing apparatus adjusts said third target position of said focus motor based on said first target position of said reference zoom motor and said second following curve The method also includes:

The image capturing device acquires an initial position of the focus motor;

The image capturing apparatus determines a first object distance according to respective initial positions of the focus motor and the reference zoom motor;

The image capture device determines the second following curve based on the first object distance and an imaging function.
The method of claim 6 or claim 7, wherein the method further comprises:

If the image capturing apparatus moves the N variable power motors and the focus motor to respective target positions, and the first image in the finder frame still does not satisfy the preset condition, the image The photographing device calculates a fourth position of the focus motor, the fourth position being obtained by moving an initial position of the focus motor in a first direction by a first preset value; the first preset value is smaller than the focus The depth of focus of the motor;

The image capturing apparatus determines a second object distance according to a fourth position of the focus motor and an initial position of the reference zoom motor;

The image capturing device determines a third following curve according to the second object distance and the imaging function;

The image capturing apparatus moves the focus motor to a fourth target position according to the first target position of the reference zoom motor and the third following curve, such that the sharpness of the first image in the finder frame satisfies Presuppose conditions.
A synchronous gathering device, characterized in that: the synchronous gathering device comprises: N variable power motors, a focus motor, a processor and a stepping motor;

The processor is connected to the stepping motor, and the processor is configured to send, to the stepping motor, a target position corresponding to each of the N variable power motors and the gather motor;

The stepping motor is respectively connected to the N variable power motors and the focus motor; the stepping motor is configured to drive the N variable power motors and the focus motor to respectively move to respective corresponding target positions.
The apparatus according to claim 9, wherein each of said N variable power motors is coupled to a variable power lens group; said variable power lens group being used for framing said synchronous focus device The image in the frame is scaled, and the variable magnification lens group includes N lenses;

The focusing motor is coupled to a focusing lens group for focusing an image in the finder frame; the focusing lens group includes M lenses, wherein N and M are integers greater than or equal to 1.
A synchronous focusing device, comprising:

An acquiring unit, configured to acquire a first image of a framing frame of the synchronous focusing device during zoom shooting;

An adjusting unit, configured to respectively adjust a position of each of the N variable power motors and the focus motor in the synchronous focusing device, so that a resolution of the first image in the finder frame satisfies a preset condition to achieve focusing; wherein N is An integer greater than or equal to 2.
The apparatus according to claim 11, wherein the adjusting unit is specifically configured to:

Determining a first target position of the reference zoom motor in the N variable power motors;

Determining respective target positions of the other N-1 variable power motors and the focus motors according to the first target position of the reference zoom motor;

The N variable power motors and the focus motor are respectively moved to respective target positions.
The apparatus according to claim 12, wherein the adjusting unit is configured to: when determining the target positions of the other N-1 variable power motors according to the first target position of the reference zoom motor, respectively:

Determining a second target position of the first variable power motor according to the first target position of the reference zoom motor and the first following curve; the first variable power motor is any one of the N-1 variable power motors a motor, the first following curve is used to indicate a positional relationship between the reference zoom motor and the first zoom motor.
The apparatus according to claim 12, wherein the adjusting unit is configured to: when determining the target positions of the other N-1 variable power motors according to the first target position of the reference zoom motor;

Determining a second target position of the first zoom motor according to the first target position of the reference zoom motor and the first following curve; the first following curve is used to indicate the reference zoom motor and the first change a positional relationship between the motors; the first variable power motor is any one of the N-1 variable power motors;

Determining a target position of each of the N-1 variable power motors other than the first variable power motor according to a second target position of the first variable power motor.
The device according to any one of claims 12-14, wherein the synchronization focusing unit further comprises a receiving unit, the receiving unit is configured to:

Receiving a zoom instruction;

The adjusting unit is specifically configured to: when determining a first target position of the reference zoom motor in the N variable power motors:

Obtaining an initial position of the reference zoom motor in the N variable power motors; N is a positive integer greater than or equal to 2;

Determining a first target position of the reference zoom motor at a first preset time based on a zoom rate included in the zoom command and the initial position.
The apparatus according to any one of claims 13-15, wherein the adjusting unit is configured to: when determining a target position of the focus motor according to the first target position of the reference zoom motor;

Determining a third target position of the focus motor according to a first target position and a second following curve of the reference zoom motor, the second following curve being used to indicate between the reference zoom motor and the focus motor Location relationship, or

Determining a third target position of the focus motor according to a second target position of the first zoom motor and a second following curve, the second following curve being used to indicate the first zoom motor and the focus motor The positional relationship between.
The apparatus according to claim 16, wherein said adjusting is performed before said adjusting unit determines said third target position of said focus motor based on said first target position of said reference zoom motor and said second following curve The unit is also used to:

Obtaining an initial position of the focus motor;

Determining a first object distance according to respective initial positions of the focus motor and the reference zoom motor;

The second following curve is determined based on the first object distance and an imaging function.
The device according to claim 16 or 17, wherein the adjusting unit is further configured to:

After the adjusting unit moves the N variable power motors and the focus motor to respective target positions, and the first image in the finder frame still does not satisfy the preset condition, the focus is calculated. a fourth position of the motor, wherein the fourth position is obtained by moving an initial position of the focus motor in a first direction by a first preset value; the first preset value is smaller than a depth of focus of the focus motor;

Determining a second object distance according to a fourth position of the focus motor and an initial position of the reference zoom motor;

Determining a third following curve according to the second object distance and the imaging function;

And moving the focus motor to the fourth target position according to the first target position of the reference zoom motor and the third following curve, so that the definition of the first image in the finder frame satisfies the preset condition.
A synchronous focusing device, comprising: a processor and a memory;

The memory is for storing computer execution instructions that, when executed by the processor, cause the synchronization focusing device to perform the method of any of claims 1-8.
A computer readable storage medium, comprising: instructions in the storage medium, when the instructions are run on a computer, causing the computer to perform the method of any of claims 1-8.
A computer program product comprising instructions, wherein when said instructions are run on a computer, causing a computer to perform the method of any of claims 1-8.