WO2021007763A1 - Photography device control method, device, handheld gimbal, and storage medium - Google Patents

Abstract

A photography device control method, a device, a handheld gimbal, and a storage medium: acquiring the rotation speed of a focus tracking apparatus, determining current focus tracking parameters of a photography device on the basis of the rotation speed of the focus tracking apparatus, and making the rotation speed of the focus tracking apparatus positively correlate with the current focus tracking parameters of the photography device; the faster the rotation of the focus tracking apparatus, the greater the distance the focus point of the photography device moves when the focus tracking apparatus rotates at the same angle; thus, when the focus point change of the photography device is greater, if detecting that the user rotates the focus tracking apparatus faster, the distance the focus point of the photography device moves is increased when the focus tracking apparatus rotates at the same angle, achieving the objective of the focus tracking apparatus following the hand.

Description

Control method of photographing equipment, equipment, handheld PTZ and storage medium Technical field

The embodiments of the present invention relate to the field of pan-tilts, and in particular, to a control method, equipment, handheld pan-tilt and storage medium of a photographing device.

Background technique

In the prior art, the photographing equipment can be mounted on a handheld pan/tilt, which can enhance the stability of the photographing equipment, and make the pictures captured by the photographing equipment more stable.

In some scenes, the user needs to perform follow focus control on the shooting device. Correspondingly, a follow focus device, such as a follow focus wheel, may be provided on the handheld pan/tilt. When the user turns the follow focus wheel, the handheld pan/tilt generates a follow focus instruction and sends the follow focus instruction to the shooting device, so that the shooting device completes the follow focus action.

However, when the focus of the shooting device changes greatly, the follow-focus wheel needs to rotate several times to achieve the expected follow-focus effect, which leads to the phenomenon that the follow-focus wheel does not follow the hand.

Summary of the invention

The embodiments of the present invention provide a control method, equipment, handheld pan/tilt and storage medium of a photographing device, so as to achieve the purpose of following the focus device with the hand.

The first aspect of the embodiments of the present invention is to provide a method for controlling a photographing device, the photographing device is mounted on a handheld pan/tilt, the handheld pan/tilt includes a follow focus device, and the method includes:

Obtaining the rotation speed of the following focus device;

Determine the current follow focus parameter of the shooting device according to the rotation speed of the follow focus device, wherein the follow focus parameter is used to indicate the distance between the rotation angle of the follow focus device and the focus movement of the shooting device Correspondence between the two, the rotation speed of the focusing device is positively correlated with the current focusing parameters of the shooting device;

According to the current follow focus parameters of the shooting device, control the shooting device to follow focus.

A second aspect of the embodiments of the present invention is to provide a control device for a photographing device, the photographing device is mounted on a handheld pan/tilt, the handheld pan/tilt includes a follow focus device and the control device, and the control device includes: Memory and processor;

The memory is used to store program codes;

The processor calls the program code, and when the program code is executed, is used to perform the following operations:

Obtaining the rotation speed of the following focus device;

Determine the current follow focus parameter of the shooting device according to the rotation speed of the follow focus device, wherein the follow focus parameter is used to indicate the distance between the rotation angle of the follow focus device and the focus movement of the shooting device Correspondence between the two, the rotation speed of the focusing device is positively correlated with the current focusing parameters of the shooting device;

According to the current follow focus parameters of the shooting device, control the shooting device to follow focus.

The third aspect of the embodiments of the present invention is to provide a handheld PTZ, including:

PTZ, used to carry shooting equipment;

A base, the head and the base are connected; and

The control device described in the second aspect.

The fourth aspect of the embodiments of the present invention is to provide a computer-readable storage medium having a computer program stored thereon, and the computer program is executed by a processor to implement the method described in the first aspect.

The control method, device, handheld pan/tilt, and storage medium of the photographing equipment provided in this embodiment obtain the rotation speed of the following focus device, and determine the current tracking of the photographing device according to the rotation speed of the following focus device. Focus parameters, so that the rotation speed of the focusing device is positively correlated with the current focusing parameters of the photographing equipment, that is, the faster the focusing device rotates, the focusing device rotates at the same angle to shoot The greater the distance that the focus of the device moves, so when it is detected that the user is turning the focusing device faster, the distance that the focus of the shooting device moves when the focusing device rotates at the same angle is increased, thereby achieving follow-up. The purpose of focusing device and hand.

Description of the drawings

In order to explain the technical solutions in the embodiments of the present invention more clearly, the following will briefly introduce the drawings used in the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor.

FIG. 1 is a schematic diagram of an application scenario provided by an embodiment of the present invention;

2 is a flowchart of a method for controlling a photographing device according to an embodiment of the present invention;

3 is a flowchart of a method for controlling a photographing device according to another embodiment of the present invention;

Figure 4 is a structural diagram of a control device provided by an embodiment of the present invention.

Reference signs:

40: control equipment; 41: memory; 42: processor;

43: the first communication interface; 44: the second communication interface.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or a central component may also exist. When a component is considered to be "connected" to another component, it can be directly connected to another component or there may be a centered component at the same time.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present invention. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The term "and/or" as used herein includes any and all combinations of one or more related listed items.

Hereinafter, some embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

The embodiment of the present invention provides a method for controlling a photographing device. The shooting device is mounted on a handheld pan/tilt.

In this embodiment, the handheld pan/tilt may include a pan/tilt and a base, the pan/tilt is connected to the base, the pan/tilt is used to carry a photographing device, and the base may specifically be a handle. The shooting device may specifically be a device or device with a shooting function such as a camera or a video camera. The photographing device can be connected to the handheld pan/tilt via a shutter cable. The type of the shutter cable is not limited here. For example, the shutter cable may be a Universal Serial Bus (USB).

In addition, the handheld pan/tilt head also includes a follow focus device, where the follow focus device may specifically be a follow focus wheel, as shown in FIG. 1. The follow focus wheel may be integrated in the handheld pan/tilt, or the follow focus wheel may be an external accessory of the handheld pan/tilt. Specifically, the follow focus wheel and the handheld pan/tilt are electrically connected through metal contacts. In this way, the problem of wire winding can be avoided while ensuring the quality of communication. The follow focus wheel can be used to control the shooting device to follow focus. Specifically, the follow focus wheel can be electrically connected to the follow focus controller in the handheld pan/tilt through metal contacts, and the follow focus controller is electrically connected to the shooting device through a USB bus.

In addition, as shown in Fig. 1, the handheld pan/tilt may also communicate with a control terminal, which may specifically be a remote control, a smart phone, a tablet computer, or the like. The control terminal may be installed with an application program (Application, APP) for controlling the handheld PTZ. This embodiment does not limit the communication mode between the handheld PTZ and the control terminal, for example, it may be a wireless communication mode or a wired communication mode. Specifically, it may be a way of wireless communication via Bluetooth.

In the prior art, when a photographing device performs a follow focus, the rotation angle of the follow focus wheel and the moving distance of the focus of the photographing device are related. Generally, the greater the rotation angle of the focus wheel, the greater the distance the focus of the camera moves. However, when the user needs to change the moving distance of the focus in a large range, the user needs to rotate the focusing wheel several times, which causes the user to be unable to quickly control the shooting device to perform the focusing, which reduces the user experience. In order to solve this problem, the embodiment of the present invention usually rotates the focus wheel quickly when the user needs to change the moving distance of the focus in a large range. By detecting the rotation speed of the focus wheel, and according to the rotation of the focus wheel The speed is used to adjust the follow focus parameters of the shooting device, so that the faster the follow focus wheel rotates, the greater the distance the focus of the shooting device moves, so that the user can quickly control the shooting device to follow focus. The control method of the photographing device will be introduced below in conjunction with specific embodiments.

FIG. 2 is a flowchart of a method for controlling a photographing device according to an embodiment of the present invention. As shown in Figure 2, the method in this embodiment may include:

Step S201: Obtain the rotation speed of the focusing device.

The execution subject of the method in this embodiment may be the follow focus controller as described above, or a part of the handheld pan/tilt head that has control functions other than the follow focus controller. In this embodiment, a follow focus controller is taken as an example for schematic description.

In an embodiment, the user can rotate the follow focus wheel to rotate the follow focus wheel. Alternatively, the control terminal may send a control instruction for controlling the rotation of the follow focus wheel to the handheld pan/tilt, and the handheld pan/tilt may control the rotation of the follow focus wheel. During the rotation of the follow focus wheel, the follow focus wheel can send its rotation speed to the follow focus controller of the handheld pan/tilt in real time or periodically. Correspondingly, the follow focus controller receives the rotation speed sent by the follow focus wheel in real time or periodically.

In another embodiment, the follow focus controller can periodically obtain the rotation angle of the follow focus wheel, for example, with a predetermined time interval as a period. In this way, it can receive the follow focus wheel at a first predetermined time interval. The angle of rotation inside to obtain the rotation speed of the focusing wheel. Optionally, the predetermined time interval may be 10 milliseconds.

Step S202: Determine the current follow focus parameter of the shooting device according to the rotation speed of the follow focus device, where the follow focus parameter is used to indicate the rotation angle of the follow focus device and the focus movement of the shooting device The corresponding relationship between the distances, the rotation speed of the focusing device is positively correlated with the current focusing parameters of the shooting device.

In this embodiment, the follow focus controller can adjust the current follow focus parameters of the photographing device according to the rotation speed of the follow focus wheel. In other words, the current follow focus parameters of the photographing device can be changed with the change of the rotation speed of the follow focus wheel.

Specifically, the follow focus parameter of the shooting device is used to indicate the correspondence between the rotation angle of the follow focus wheel and the distance moved by the focus of the shooting device. Normally, the greater the rotation angle of the focus wheel, the greater the distance the focus of the camera moves.

In this embodiment, the greater the rotation speed of the focus wheel, the greater the current focus parameter of the camera. In other words, the faster the focus wheel rotates, the greater the distance the focus of the photographing device moves when the focus wheel rotates at the same angle. In the same way, the slower the focus wheel rotates, the smaller the distance the focus of the shooting device moves when the focus wheel rotates at the same angle.

For example, the rotating speed of the focusing wheel at t0 is 1 rad/s, and the rotating speed of the focusing wheel at t1 increases to 3 rad/s. When the follow focus wheel rotates at a speed of 3 rad/s by an angle such as θ, the focal distance of the photographing device moves larger than when the follow focus wheel rotates at a speed of 1 rad/s the same angle θ.

In this way, when the user needs to move the focus in a large range, the speed of turning the follow-focus wheel can be increased, so that when the follow-focus controller detects that the rotation speed of the follow-focus wheel increases, the follow-focus parameters can be adjusted to realize the rapid movement of the focus; When the user needs to move the focus in a small range, the speed of turning the focus wheel can be slowed down, so that when the follow focus controller detects that the rotation speed of the focus wheel decreases, the focus parameters are adjusted to achieve fine adjustment of the focus.

Optionally, the follow focus parameter of the shooting device includes a follow focus gear. The follow focus gear is used to indicate the distance that the focus of the photographing device moves when the follow focus device rotates by a unit angle. For example, the follow focus gear is used to indicate the distance that the focus of the photographing device moves when the follow focus wheel rotates 1 degree. Wherein, the relationship between the follow focus gear and the moving distance of the focus of the photographing device is not limited to an equal relationship, and may also be a proportional coefficient relationship. For example, the moving distance of the focus of the photographing device may be the following focus gear multiplied by a preset scale factor.

When the rotation speed of the follow focus wheel is greater, the follow focus gear of the photographing device is higher. That is to say, when the follow focus wheel rotates faster, the distance that the focus of the photographing device moves when the follow focus wheel rotates 1 degree.

In this embodiment, the rotation speed of the focusing wheel can be divided into several step gears. For example, the rotation speed of the focusing wheel can be divided into 3 step gears, and the first step gear is 1rad/s-2rad/s, the second step gear is 2rad/s-3rad/s, and the third step gear is 3rad/s-4rad/s. Correspondingly, each step gear corresponds to a follow focus gear of the shooting device. For example, the follow-focus gear corresponding to the first step gear is denoted as follow-focus gear 1. Follow-focus gear 1 means that the focal distance of the photographing device moves 1 cm when the follow-focus wheel rotates 1 degree. The follow-focus gear corresponding to the second step gear is denoted as follow-focus gear 2. Follow-focus gear 2 indicates that the distance of the focus of the camera when the follow-focus wheel rotates 1 degree is 2 cm. The follow-focus gear corresponding to the third step gear is denoted as follow-focus gear 3. Follow-focus gear 3 means that the distance of the focus of the camera when the follow-focus wheel rotates 1 degree is 3 cm. In some embodiments, the follow focus controller further includes a memory, and the memory stores a preset control table (see Table 1 below). The control table includes the range of the rotation speed of the follow focus wheel and the follow focus gear of the shooting device. The corresponding relationship. In this way, when the follow focus controller determines the current follow focus parameters of the shooting device, such as the follow focus gear, according to the rotation speed of the follow focus wheel, it can be determined by querying the control table to improve control efficiency.

Table 1

Rotation speed (rad/s) Follow focus gear 1rad/s-2rad/s 1 2rad/s-3rad/s 2 3rad/s-4rad/s 3 4rad/s-5rad/s 4 5rad/s-6rad/s 5

Step S203: Control the shooting device to follow focus according to the current follow focus parameters of the shooting device.

Further, the follow focus controller can convert the rotation speed of the follow focus wheel into the follow focus control command of the shooting device according to the type information of the shooting device and the current follow focus parameters of the shooting device, and control the follow focus The instruction is sent to the shooting device through the shutter release as described above, so that the shooting device can control its own lens to perform follow focus according to the follow focus control instruction, thereby realizing the wire-controlled follow focus of the shooting device.

In this embodiment, the rotation speed of the following focus device is acquired, and the current follow focus parameters of the shooting device are determined according to the rotation speed of the following focus device, so that the rotation speed of the following focus device is the same as the current speed of the shooting device. The follow focus parameters are positively correlated, that is, the faster the follow focus device rotates, the greater the distance the focus of the shooting device moves when the follow focus device rotates at the same angle, so that when the user is detected to rotate the follow focus When the speed of the focus device is faster, the distance that the focus of the shooting device moves when the focus device rotates at the same angle is increased, thereby achieving the purpose of the focus device following the hand.

The embodiment of the present invention provides a method for controlling a photographing device. In this embodiment, the user can also set the initial follow focus parameters of the shooting device on the control terminal. For example, the user sets the initial focus position of the shooting device on the user interface of the control terminal. For example, the user sets the initial follow-focus gear of the photographing device on the user interface to follow-focus gear 1, that is, when the follow-focus wheel rotates 1 degree, the distance of the focus of the photographing device is 1 cm. Further, the control terminal sends the user's setting information, that is, the initial focus position to the handheld pan/tilt.

Optionally, the determining the current follow focus parameters of the shooting device according to the rotation speed of the following focus device includes: determining according to the rotation speed of the following focus device and the initial follow focus parameters of the shooting device The current follow focus parameters of the shooting device. Wherein, the initial follow focus parameter of the photographing device is set by the user through the control terminal. Specifically, the initial focus parameters of the photographing device are set by the user through the user interface of the control terminal.

Specifically, after the follow focus controller of the handheld pan/tilt receives the initial follow focus gear of the photographing device sent by the control terminal, it determines the initial follow focus gear of the photographing device and the rotation speed of the follow focus wheel. The current focus position of the camera. One possible way is that the current follow-focus gear of the shooting device=initial follow-focus gear+rotation speed of the follow-focus wheel*coefficient. It can be understood that the relationship between the current follow focus gear and the initial follow focus gear of the shooting device here is only a schematic illustration, and is not limited to a specific form. In other embodiments, other expressions may also be used. Form or other functional relationship. In other words, the initial focus gear set by the user can be used as the reference gear. As the rotation speed of the focus wheel changes, the current focus gear of the camera also changes, for example, The faster the focal wheel rotates, the higher the current focus gear of the camera.

In other embodiments, the current follow focus gear of the photographing device may not change with the rotation speed of the follow focus wheel, and the follow focus controller may control the follow focus of the photographing device only according to the follow focus gear set by the user. For example, when the handheld pan/tilt receives the initial focus position of the shooting device set by the user, the follow focus controller controls the focus of the shooting device according to the initial focus position, and the current focus position of the shooting device is It is the initial focus position of the camera. When the user sets again through the control terminal to update the follow focus gear of the photographing device, the current follow focus gear of the photographing device is the updated follow focus gear. Further, the follow focus controller is based on the updated follow focus gear. The follow focus position controls the follow focus of the camera.

In some other embodiments, the APP of the control terminal or the handheld pan/tilt may also be provided with a mode switch button or button. Here we take the button as an example. The mode switch button can be used to control the camera to follow focus in two modes. For example, the mode in which the current follow-focus gear of the shooting device changes with the change of the rotation speed of the follow-focus wheel is recorded as follow-focus mode 1, and the current follow-focus gear of the shooting device does not change with the change of the rotation speed of the follow-focus wheel. The changed mode is recorded as follow focus mode 2. For example, when the mode switching button is turned on, the follow focus mode of the shooting device is follow focus mode 1; when the mode switching button is turned off, the follow focus mode of the shooting device is follow focus mode 2. In this way, before acquiring the rotation speed of the following focus device, that is, step S201 as described above, it is also necessary to acquire the follow focus mode of the shooting device. Specifically, the state information of the mode switching button is acquired, and the mode switching button The status information obtains the follow focus mode of the camera. Correspondingly, in step S202, if the follow focus mode of the shooting device is follow focus mode 1, the follow focus controller determines the current follow focus parameters of the shooting device according to the rotation speed of the follow focus device.

Optionally, the photographing device and the handheld pan/tilt are connected through a shutter release, and the method further includes: acquiring the type information of the photographing equipment through the shutter release. Optionally, the shutter release is a universal serial bus USB.

As shown in Fig. 1, the photographing device and the handheld pan/tilt are connected through a shutter cable. Specifically, the photographing device can be connected with the follow focus controller in the handheld pan/tilt through a shutter cable. The type of the shutter release is not limited in this embodiment. For example, the shutter release may be a universal serial bus USB. The follow focus controller can obtain the type information of the shooting device through the USB.

Correspondingly, the initial follow focus parameter of the photographing device is determined according to the type information of the photographing device. For example, when the camera is mounted on the handheld PTZ and the follow focus controller obtains the type information of the camera through the USB, the follow focus controller can automatically set the type information according to the type information of the camera. The corresponding initial follow focus parameters, for example, the initial follow focus gear. In this embodiment, the type information of the shooting device is acquired through the shutter release, and the initial follow focus parameters of the shooting device are determined according to the type information of the shooting device, which improves the compatibility of the handheld PTZ with different types of shooting devices, and realizes the integration A smooth and focused feel.

In some other embodiments, the handheld pan/tilt can further send the type information of the shooting device to the control terminal, and the user can set different initial focusing parameters (such as initial focusing gear) according to actual shooting requirements to meet different requirements. The user's follow focus feel. For example, when the user wants the shooting device to follow focus faster, the user can set the initial follow focus gear of the shooting device higher, so that the focus of the shooting device when the user rotates the follow focus wheel slightly Move a larger distance.

The embodiment of the present invention provides a method for controlling a photographing device. FIG. 3 is a flowchart of a method for controlling a photographing device according to another embodiment of the present invention. As shown in FIG. 3, on the basis of the foregoing embodiment, the controlling the shooting device to follow focus according to the current follow focus parameters of the shooting device may include:

Step S301: Obtain the rotation angle of the focusing device.

In an embodiment, the follow focus wheel may be provided with an angle sensor for detecting the rotation angle of the follow focus wheel, and the angle sensor may periodically send the rotation angle of the follow focus wheel to the follower. Focus controller. For example, the angle sensor collects the rotation angle of the follow focus wheel every 10 milliseconds and sends it to the follow focus controller.

In other embodiments, during the rotation of the follow focus wheel, the follow focus wheel may periodically send its rotation speed to the follow focus controller of the handheld pan/tilt. For example, the follow focus wheel may send a rotation speed every 10 milliseconds. The follow focus controller can determine the rotation angle of the follow focus wheel according to the rotation speed and transmission period sent by the follow focus wheel.

Step S302: Generate a follow focus control instruction according to the current follow focus parameters of the shooting device, the rotation angle of the follow focus device, and the type information of the shooting device.

For example, the follow focus controller may generate a follow focus control command according to the current follow focus parameters of the shooting device (for example, the current follow focus gear), the rotation angle of the follow focus wheel, and the type information of the shooting device.

Optionally, the generating a follow focus control instruction according to the current follow focus parameters of the shooting device, the rotation angle of the follow focus device, and the type information of the shooting device includes: according to the current follow focus parameters of the shooting device The focus parameter and the rotation angle of the follow focus device determine the distance that the focus of the shooting device needs to move; according to the distance that the focus needs to move of the shooting device and the type information of the shooting device, a follow focus control instruction is generated.

In this embodiment, it is assumed that the current follow-focus gear of the photographing device is the follow-focus gear 3, that is, the focal distance of the photographing device moves 3 cm when the follow-focus wheel rotates by 1 degree. In addition, assuming that the rotation angle of the follow focus wheel is 2 degrees, the follow focus controller can determine the distance that the focus of the shooting device needs to move according to the current follow focus gear of the shooting device and the rotation angle of the follow focus wheel. 6 cm. Further, the follow focus controller generates a follow focus control instruction according to the distance that the focus of the shooting device needs to move and the type information of the shooting device.

Optionally, the generating a follow focus control instruction according to the distance to be moved by the focus of the shooting device and the type information of the shooting device includes: determining the follow focus of the shooting device according to the type information of the shooting device Focus step value; according to the distance that the focus of the shooting device needs to move and the follow focus step value of the shooting device, a follow focus control instruction is generated.

It can be understood that different types of shooting devices have different follow focus step values. The follow focus step value can be understood as the distance that the focus of the shooting device can move every time the follow focus controller sends a follow focus control command to the shooting device . For example, for the first type of shooting device, each time the follow focus controller sends a follow focus control instruction to the shooting device, the distance that the focus of the shooting device can move is 1 cm. For the second type of shooting device, each time the follow focus controller sends a follow focus control instruction to the shooting device, the distance that the focus of the shooting device can move is 2 cm. Assuming that the handheld PTZ is equipped with the first type of shooting device, when the distance that the focus of the shooting device needs to move is 6 cm, the follow focus controller needs to send 6 follow focus control commands to the shooting device.

Step S303: Send the follow focus control instruction to the photographing device.

For example, the follow focus controller sends 6 follow focus control instructions to the shooting device, and the shooting device controls the lens of the shooting device to follow focus according to the 6 follow focus control instructions, so that the focus of the shooting device moves 6 cm .

This embodiment obtains the rotation angle of the follow focus device, and generates a follow focus control command based on the current follow focus parameters of the shooting device, the rotation angle of the follow focus device, and the type information of the shooting device, and then sends the follow focus control command to the shooting device. The device realizes the follow focus control of the shooting device.

In some scenes, the damping grease of the follow focus wheel may be applied unevenly, and the communication link between the follow focus wheel and the handheld gimbal and/or the communication link between the handheld gimbal and the shooting settings may have a long transmission delay. , Or because the follow focus step value of the shooting device is too large, the focus of the shooting device may jump, and the user feels stuck. However, the focus jumps and freezes, which will directly affect the video shooting effect and give users a sense of incoherence. In response to this problem, this embodiment proposes a method for smoothing the rotation speed of the follow focus wheel so that the rotation speed of the follow focus wheel is continuous.

Specifically, the follow focus controller may create a timer for detecting the time interval at which the follow focus wheel sends the rotation speed to the follow focus controller.

Optionally, if the rotation speed of the following focus device is not received within a preset time, interpolation processing is performed on the rotation speed of the following focus device that has not been received.

For example, after the follow focus controller starts the timer, if the rotation speed sent by the follow focus wheel is not received within a preset period of time, for example, within a period of 10 milliseconds as described above, it is determined that the rotation speed has packet loss or discontinuity. Furthermore, the follow focus controller can perform interpolation processing on the unreceived rotation speed. For example, a multi-order difference algorithm is used for interpolation processing.

Optionally, the performing interpolation processing on the rotation speed of the following focus device that has not been received includes: determining the rotation speed of the following focus device that has not been received according to historical time. The speed of rotation of the focal device.

For example, if the follow focus controller normally receives the rotation speed of the follow focus wheel at time t1 and t2, but does not receive the rotation speed of the follow focus wheel at time t3, the follow focus controller can be based on the speed at t1. The rotation speed of the focusing wheel normally received at time and t2, predict the rotation speed of the focusing wheel at time t3, and use the predicted rotation speed as the rotation speed of the focusing wheel at time t3. As a result, the rotation speed of the follow focus wheel becomes smooth and continuous, and avoids the occurrence of problems such as the jump of the focus of the shooting device and the user's hand feeling stuck.

In some other scenes, when the follow focus wheel stops rotating, the follow focus wheel may be affected by damping and produce a reverse rotation speed. When the follow focus wheel sends the reverse rotation speed to the follower When the focus controller is in focus, the follow focus control command generated by the follow focus controller will cause the focus of the shooting device to rebound, thereby causing the shooting device to have problems of virtual focus and out of focus. Or, the base of the handheld gimbal may vibrate due to some reasons, causing the follow focus wheel to send a non-directional speed to the follow focus controller, which causes the problem of virtual focus and out of focus on the shooting device. In response to this problem, after obtaining the rotation speed of the following focus device, the method further includes: filtering the rotation speed of the following focus device.

For example, after the follow focus controller receives the rotation speed of the follow focus wheel, it further filters the rotation speed of the follow focus wheel, so as to filter out the abnormal rotation speed.

In a possible manner, the filtering processing on the rotation speed of the follow focus device includes: filtering out a rotation speed less than or equal to a first preset threshold.

For example, in this embodiment, the follow focus controller may adopt a dead zone control method to regard a rotation speed less than or equal to the first preset threshold as zero speed.

In another possible manner, the filtering processing on the rotation speed of the follow focus device includes: filtering out a rotation speed greater than or equal to a second preset threshold.

For example, the follow focus controller may also filter out the rotation speed greater than or equal to the second preset threshold. Wherein, the first preset threshold and the second preset threshold may be the same or different.

In this embodiment, by filtering the rotation speed of the focusing wheel, the abnormal rotation speed is filtered out, which can avoid the problems of virtual focus and out-of-focus of the shooting device.

The embodiment of the present invention provides a control device of a photographing device. The photographing device is mounted on a handheld pan/tilt, the handheld pan/tilt includes a follow focus device and the control device, and the control device may specifically be the follow focus controller as described above. FIG. 4 is a structural diagram of a control device provided by an embodiment of the present invention. As shown in FIG. 4, the control device 40 includes: a memory 41 and a processor 42; the memory is used to store program codes; and the processor 42 calls the program Code, when the program code is executed, it is used to perform the following operations: obtain the rotation speed of the follow focus device; determine the current follow focus parameters of the photographing device according to the rotation speed of the follow focus device, where the The follow focus parameter is used to indicate the correspondence between the rotation angle of the follow focus device and the distance moved by the focus of the shooting device, and the rotation speed of the follow focus device is positively related to the current follow focus parameter of the shooting device ; According to the current follow focus parameters of the shooting device, control the shooting device to follow focus.

Optionally, the follow focus parameter of the shooting device includes a follow focus gear.

Optionally, when the processor 42 determines the current follow focus parameters of the shooting device according to the rotation speed of the following focus device, it is specifically configured to: according to the rotation speed of the following focus device and the initial follow focus of the shooting device The focus parameter determines the current follow focus parameter of the shooting device.

Optionally, the initial follow focus parameter of the photographing device is set by the user through the control terminal.

Optionally, the initial follow focus parameter of the photographing device is set by the user through the user interface of the control terminal.

Optionally, the photographing device and the handheld pan/tilt are connected through a shutter release, and the processor 42 is further configured to obtain the type information of the photographing equipment through the shutter release.

Optionally, the shutter release is a universal serial bus USB.

Optionally, the processor 42 may determine the initial follow focus parameter of the photographing device according to the type information of the photographing device.

Optionally, the control device further includes: a first communication interface 43, the first communication interface 43 is used to communicate with the shooting device; the processor 42 controls the shooting device according to the current focus parameters of the shooting device When performing follow focus, it is specifically used to: obtain the rotation angle of the follow focus device; generate the follow focus according to the current follow focus parameters of the shooting device, the rotation angle of the follow focus device and the type information of the shooting device Control instruction; the follow focus control instruction is sent to the shooting device through the first communication interface 43.

Optionally, when the processor 42 generates a follow focus control instruction according to the current follow focus parameters of the shooting device, the rotation angle of the follow focus device, and the type information of the shooting device, it is specifically configured to: The current follow focus parameters of the device and the rotation angle of the follow focus device determine the distance that the focus of the shooting device needs to move; according to the distance that the focus needs to move of the shooting device and the type information of the shooting device, a follower is generated Focus control instructions.

Optionally, when the processor 42 generates a follow focus control instruction according to the distance that the focus of the photographing device needs to move and the type information of the photographing device, it is specifically configured to: determine the type information of the photographing device The follow focus step value of the shooting device; according to the distance that the focus of the shooting device needs to move and the follow focus step value of the shooting device, a follow focus control instruction is generated.

Optionally, the control device further includes: a second communication interface 44, the second communication interface 44 is used to communicate with the focus device; the processor 42 is further used: if the second communication interface 44 is within a preset time If the rotation speed of the focusing device is not received, interpolation processing is performed on the rotation speed of the focusing device that has not been received.

Optionally, when the processor 42 interpolates the unreceived rotation speed of the following focus device, it is specifically configured to: determine the unreceived rotation speed of the following focus device according to the received rotation speed in the historical time. The rotation speed of the follow focus device.

Optionally, after the processor 42 obtains the rotation speed of the following focus device, it is further used to filter the rotation speed of the following focus device.

Optionally, when the processor 42 performs filtering processing on the rotation speed of the follow focus device, it is specifically configured to filter out rotation speeds that are less than or equal to a first preset threshold.

Optionally, when the processor 42 performs filtering processing on the rotation speed of the following focus device, it is specifically configured to filter out a rotation speed greater than or equal to a second preset threshold.

Optionally, the follow focus device includes a follow focus wheel.

The specific principles and implementation manners of the control device provided in the embodiment of the present invention are similar to those in the foregoing embodiment, and will not be repeated here.

In this embodiment, the rotation speed of the following focus device is acquired, and the current follow focus parameters of the shooting device are determined according to the rotation speed of the following focus device, so that the rotation speed of the following focus device is the same as the current speed of the shooting device. The follow focus parameters are positively correlated, that is, the faster the follow focus device rotates, the greater the distance the focus of the shooting device moves when the follow focus device rotates at the same angle, so when the focus of the shooting device changes When it is larger, if it is detected that the user is turning the focusing device faster, increase the distance that the focus of the shooting device moves when the focusing device rotates at the same angle, thereby achieving the purpose of the focusing device following the hand .

The embodiment of the present invention provides a handheld PTZ. The handheld PTZ includes a PTZ, a base, and the follow focus device and control equipment as described in the above embodiment. Among them, the pan/tilt is used to carry shooting equipment; the base is connected with the pan/tilt. The control device can be used to execute the technical solutions of the foregoing method embodiments, and its implementation principles and technical effects are similar, and will not be repeated here.

In addition, this embodiment also provides a computer-readable storage medium on which a computer program is stored, and the computer program is executed by a processor to implement the control method of the photographing device described in the foregoing embodiment.

In the several embodiments provided by the present invention, it should be understood that the disclosed device and method may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in the various embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware, or may be implemented in the form of hardware plus software functional units.

The above-mentioned integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The above-mentioned software functional unit is stored in a storage medium and includes several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor execute the method described in the various embodiments of the present invention. Part of the steps. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

Those skilled in the art can clearly understand that, for the convenience and conciseness of the description, only the division of the above-mentioned functional modules is used as an example. In practical applications, the above-mentioned functions can be allocated by different functional modules as required, namely, the device The internal structure is divided into different functional modules to complete all or part of the functions described above. For the specific working process of the device described above, reference may be made to the corresponding process in the foregoing method embodiment, which is not repeated here.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand: It is still possible to modify the technical solutions described in the foregoing embodiments, or equivalently replace some or all of the technical features; these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention range.

Claims (36)

A method for controlling photographing equipment, wherein the photographing equipment is mounted on a handheld pan/tilt, the handheld pan/tilt includes a follow focus device, and the method includes: Obtaining the rotation speed of the following focus device; Determine the current follow focus parameter of the shooting device according to the rotation speed of the follow focus device, wherein the follow focus parameter is used to indicate the distance between the rotation angle of the follow focus device and the focus movement of the shooting device Correspondence between the two, the rotation speed of the focusing device is positively correlated with the current focusing parameters of the shooting device; According to the current follow focus parameters of the shooting device, control the shooting device to follow focus. The method according to claim 1, wherein the follow focus parameter of the photographing device includes a follow focus gear. The method according to claim 1 or 2, wherein the determining the current follow focus parameters of the photographing device according to the rotation speed of the follow focus device comprises: Determine the current follow focus parameter of the shooting device according to the rotation speed of the follow focus device and the initial follow focus parameter of the shooting device. The method according to claim 3, wherein the initial follow focus parameter of the photographing device is set by a user through a control terminal. The method according to claim 4, wherein the initial follow focus parameter of the photographing device is set by a user through a user interface of the control terminal. The method according to claim 1, wherein the photographing device and the handheld pan/tilt are connected through a shutter release cable, and the method further comprises: Obtain the type information of the photographing device through the shutter release. The method according to claim 6, wherein the shutter release is a universal serial bus (USB). The method according to claim 6, wherein the initial follow focus parameter of the photographing device is determined according to the type information of the photographing device. The method according to claim 7, wherein the controlling the shooting device to perform follow focus according to the current follow focus parameters of the shooting device comprises: Obtaining the rotation angle of the follow focus device; Generate a follow focus control instruction according to the current follow focus parameters of the shooting device, the rotation angle of the follow focus device, and the type information of the shooting device; Send the follow focus control instruction to the photographing device. The method according to claim 9, wherein the generating a follow focus control command according to the current follow focus parameters of the shooting device, the rotation angle of the follow focus device, and the type information of the shooting device, comprises : Determine the distance that the focus of the shooting device needs to move according to the current follow focus parameters of the shooting device and the rotation angle of the follow focus device; According to the distance that the focus of the photographing device needs to move and the type information of the photographing device, a follow focus control instruction is generated. The method according to claim 10, wherein the generating a follow focus control instruction according to the distance that the focus of the photographing device needs to move and the type information of the photographing device comprises: Determine the follow focus step value of the photographing device according to the type information of the photographing device; According to the distance that the focus of the photographing device needs to move and the follow-focus step value of the photographing device, a follow-focus control instruction is generated. The method of claim 1, wherein the method further comprises: If the rotation speed of the focusing device is not received within the preset time, interpolation processing is performed on the rotation speed of the focusing device that has not been received. The method according to claim 12, wherein the interpolating the unreceived rotation speed of the follow focus device comprises: Determine the rotation speed of the following focus device that is not received according to the rotation speed of the following focus device received in the historical time. The method according to claim 1, wherein after the obtaining the rotation speed of the follow focus device, the method further comprises: The rotation speed of the follow focus device is filtered. The method according to claim 14, wherein the filtering the rotation speed of the follow focus device comprises: Filter out rotation speeds less than or equal to the first preset threshold. The method according to claim 14, wherein the filtering the rotation speed of the follow focus device comprises: Filter out rotation speeds greater than or equal to the second preset threshold. The method according to claim 1, wherein the follow focus device comprises a follow focus wheel. A control device for photographing equipment, characterized in that the photographing equipment is mounted on a handheld pan/tilt, the handheld pan/tilt includes a follow focus device and the control device, and the control device includes: a memory and a processor; The memory is used to store program codes; The processor calls the program code, and when the program code is executed, is used to perform the following operations: Obtaining the rotation speed of the following focus device; Determine the current follow focus parameter of the shooting device according to the rotation speed of the follow focus device, wherein the follow focus parameter is used to indicate the distance between the rotation angle of the follow focus device and the focus movement of the shooting device Correspondence between the two, the rotation speed of the focusing device is positively correlated with the current focusing parameters of the shooting device; According to the current follow focus parameters of the shooting device, control the shooting device to follow focus. The control device according to claim 18, wherein the follow focus parameter of the photographing device includes a follow focus gear. The control device according to claim 18 or 19, wherein the processor is specifically configured to: when determining the current follow focus parameters of the photographing device according to the rotation speed of the follow focus device: Determine the current follow focus parameter of the shooting device according to the rotation speed of the follow focus device and the initial follow focus parameter of the shooting device. The control device according to claim 20, wherein the initial follow focus parameter of the photographing device is set by the user through the control terminal. The control device according to claim 21, wherein the initial follow focus parameter of the photographing device is set by a user through a user interface of the control terminal. The control device according to claim 18, wherein the photographing device and the handheld pan/tilt are connected by a shutter release cable, and the processor is further configured to: Obtain the type information of the photographing device through the shutter release. The control device according to claim 23, wherein the shutter release is a universal serial bus (USB). The control device according to claim 23, wherein the initial follow focus parameter of the photographing device is determined according to the type information of the photographing device. The control device according to claim 24, wherein the control device further comprises: a first communication interface, the first communication interface being used to communicate with the photographing device; When the processor controls the shooting device to follow focus according to the current follow focus parameters of the shooting device, it is specifically configured to: Obtaining the rotation angle of the follow focus device; Generate a follow focus control instruction according to the current follow focus parameters of the shooting device, the rotation angle of the follow focus device, and the type information of the shooting device; The following focus control instruction is sent to the photographing device through the first communication interface. The control device according to claim 26, wherein the processor generates a follow focus control based on current follow focus parameters of the shooting device, a rotation angle of the follow focus device, and type information of the shooting device When instructing, it is specifically used for: Determine the distance that the focus of the shooting device needs to move according to the current follow focus parameters of the shooting device and the rotation angle of the follow focus device; According to the distance that the focus of the photographing device needs to move and the type information of the photographing device, a follow focus control instruction is generated. The control device according to claim 27, wherein the processor generates a follow focus control instruction according to the distance that the focus of the shooting device needs to move and the type information of the shooting device, which is specifically used for: Determine the follow focus step value of the photographing device according to the type information of the photographing device; According to the distance that the focus of the photographing device needs to move and the follow-focus step value of the photographing device, a follow-focus control instruction is generated. The control device according to claim 18, wherein the control device further comprises: a second communication interface, the second communication interface being used to communicate with the focusing device; The processor is also used for: If the second communication interface does not receive the rotation speed of the following focus device within the preset time, interpolation processing is performed on the rotation speed of the following focus device that has not been received. The control device according to claim 29, wherein when the processor performs interpolation processing on the unreceived rotation speed of the follow focus device, it is specifically configured to: Determine the rotation speed of the following focus device that is not received according to the rotation speed of the following focus device received in the historical time. The control device according to claim 18, wherein after the processor obtains the rotation speed of the follow focus device, it is further configured to: The rotation speed of the follow focus device is filtered. The control device according to claim 31, wherein when the processor filters the rotation speed of the follow focus device, it is specifically configured to: Filter out rotation speeds less than or equal to the first preset threshold. The control device according to claim 31, wherein when the processor filters the rotation speed of the follow focus device, it is specifically configured to: Filter out rotation speeds greater than or equal to the second preset threshold. The control device according to claim 18, wherein the follow focus device comprises a follow focus wheel. A handheld pan/tilt, characterized in that it comprises: PTZ, used to carry shooting equipment; A base, the head and the base are connected; and The control device of any one of claims 18-34. A computer-readable storage medium, characterized in that a computer program is stored thereon, and the computer program is executed by a processor to implement the method according to any one of claims 1-17.

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