CN115942114B - Virtual-real camera picture shooting method - Google Patents
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Abstract
The invention provides a virtual-real camera picture shooting method, which comprises the steps that a safety area is arranged in the middle of a ring screen, the initial position of a real focus is located in the safety area, when the real camera receives a focus position change instruction, the real camera sends the focus position change instruction to a ring screen host, and the ring screen host judges whether the real focus leaves the safety area later if the real camera executes the focus position change instruction according to the focus position change instruction and the current position of the real focus; if the ring curtain host judges that the real focus leaves the safe area, a negative instruction is sent to the real camera, and the real camera refuses to execute the focus position change instruction according to the negative instruction; if the ring curtain host judges that the real focus does not leave the safety area, a positive instruction is sent to the real camera, and the real camera executes the focus position change instruction according to the positive instruction so as to enable the real focus to move in the safety area.
Description
Technical Field
The invention relates to the field of video shooting, in particular to a virtual-real camera picture shooting method.
Background
In the shooting process of the virtual film production, the virtual camera is required to transmit the virtual image to the annular screen for playing, then the real camera shoots the annular screen, and finally the shooting picture of the real camera and the virtual image transmitted by the virtual camera are focused and overlapped.
In the actual virtual film making process, severe near view blurring and far view blurring appear in the finally obtained picture, so that film making quality is poor, and even if repeated shooting is performed for many times, the situation cannot be effectively improved.
Disclosure of Invention
Based on this, it is necessary to provide a virtual-to-real camera picture photographing method for a series of problems existing in the problem of poor virtual production quality.
The technical scheme provided by the invention is as follows:
a virtual-real camera picture shooting method comprises,
Establishing signal connection between a real camera and a virtual camera, wherein the virtual camera is electrically connected to a ring screen host, the ring screen host is electrically connected to a ring screen, the real camera shoots the ring screen, and a real image shot by the real camera and a virtual image transmitted to the ring screen host by the virtual camera are overlapped;
setting a safety area in the middle of the annular curtain, and enabling the initial position of the real focus to be located in the safety area;
establishing signal connection between a real camera and a ring screen host;
When the real camera receives the focus position change instruction, the real camera sends the focus position change instruction to the annular curtain host, and the annular curtain host judges whether the real focus leaves a safe area later if the real camera executes the focus position change instruction according to the focus position change instruction and the current position of the real focus;
If the ring curtain host judges that the real focus leaves the safe area, a negative instruction is sent to the real camera, and the real camera refuses to execute the focus position change instruction according to the negative instruction;
If the ring curtain host judges that the real focus does not leave the safety area, a positive instruction is sent to the real camera, and the real camera executes the focus position change instruction according to the positive instruction so as to enable the real focus to move in the safety area.
The real camera comprises a hand wheel type focusing signal transmitting end, a focusing motor electrically connected with the hand wheel type focusing signal transmitting end and a real lens for controlling the real focus position by the focusing motor, wherein the hand wheel type focusing signal transmitting end is connected to a ring screen host in a signal manner, and the hand wheel type focusing signal transmitting end determines whether to control the focusing motor to rotate according to a received positive instruction or a negative instruction.
The invention matches the real focus with the virtual focus before the superposition of the real image and the virtual image.
The hand wheel type focusing signal transmitting end always transmits the focus position change instruction to the virtual camera, and the virtual camera adjusts the position of the virtual focus according to the focus position change instruction.
In the matching process of the real focus and the virtual focus, the ring curtain host records the corresponding relation between the torque current of the focusing motor and the position of the virtual focus;
If the virtual focus moves from outside the safety area to inside the safety area, the ring curtain host sends a matching execution signal to the focusing motor, and the focusing motor performs torque adjustment according to the position of the virtual focus in the safety area after receiving the matching execution signal so as to enable the real focus to be matched with the virtual focus again.
According to the invention, if the hand wheel type focusing signal transmitting end transmits a self-checking instruction to the adjuster Jiao Dianji, the focusing motor firstly records the current torque current A after receiving the self-checking instruction, then respectively obtains the positive torque current maximum value A max1 and the negative torque current maximum value A max2 through positive rotation and negative rotation, takes A max1 and-A max2 as endpoint values to construct a progress bar, then the focusing motor rotates to a state before receiving the self-checking instruction, marks a position corresponding to the current state in the progress bar, and finally stores the progress bar into a memory and transmits the progress bar to the hand wheel type focusing signal transmitting end.
The hand wheel type focusing signal transmitting end is connected with the ring curtain host machine through an OSC protocol, and the hand wheel type focusing signal transmitting end is connected to the focusing motor through an nrf point-to-point protocol.
The hand wheel type focusing signal transmitting end comprises a hand wheel, an encoder connected with the hand wheel and a singlechip electrically connected with the encoder, wherein the singlechip is electrically connected with a focusing motor and is wirelessly connected to a ring curtain host.
The hand wheel type focusing signal transmitting end also comprises a control screen which is electrically connected with a singlechip, and the singlechip is provided with a dual-core processor.
The singlechip is provided with a reverse control button, and the rotation directions of the focusing motors controlled by the hand wheels are opposite before and after the reverse control button is triggered.
The beneficial effects of the invention are as follows:
The near view blur and the far view blur of the virtual film making final film are brought by the virtual focus position change of the virtual camera and the real focus position change of the real camera together, and the real focus is generally required to be matched with the virtual focus position. When the real focus is positioned in the safety area, the real camera and the virtual camera cannot generate obvious near view blur and far view blur, so as long as the focus position change instruction cannot lead the real focus to leave the safety area, the final virtual film production cannot generate obvious near view blur and far view blur, otherwise, if the focus position change instruction can lead the real focus to leave the safety area, the real camera cannot respond to the focus position change instruction, at the moment, if the virtual camera responds to the focus position change instruction, the virtual focus position can change, the final virtual film production can only generate near view blur or far view blur due to the virtual focus position change, and therefore, the final film production can also display visual blurring effect change caused by the focus position change, but the blurring effect is effectively inhibited, the film production quality is improved, and if the virtual camera does not respond to the focus position change instruction, the virtual focus position cannot change, so that the virtual focus position change and the real focus position change cannot bring about the blurring effect in the final virtual film production, and the final film production image quality is also improved.
Drawings
Fig. 1 is a flowchart of a method for capturing images of a virtual-real camera according to embodiment 1 of the present invention.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Example 1:
referring to fig. 1, the present embodiment provides a method for capturing images of a virtual camera, which includes the following steps (in the present embodiment, focus positions are all represented by focus values, and motor rotation is represented by motor shaft rotation).
Step S1: the method comprises the steps of establishing signal connection between a real camera and a virtual camera, wherein the virtual camera is electrically connected to a ring screen host, the ring screen host is electrically connected to a ring screen, the real camera shoots the ring screen, and a real image shot by the real camera and a virtual image transmitted to the ring screen host by the virtual camera are overlapped.
The real camera comprises a hand wheel type focusing signal transmitting end, a focusing motor electrically connected with the hand wheel type focusing signal transmitting end and a real lens for controlling the real focus position by the focusing motor. The shooting personnel manually operate the hand wheel type focusing signal transmitting end to enable the hand wheel type focusing signal transmitting end to transmit a rotating signal to the focusing motor so as to control the motor shaft of the focusing motor to rotate, the focal position of the real lens is controlled to change in a gear transmission mode in the motor shaft rotating process, accordingly, the focal point of the real lens is a real focal point, meanwhile, the focal point of the real lens is a focal point of the real camera, and accordingly, a real image shot by the real camera also has a real focal point. The hand wheel type focusing signal transmitting end generates a signal transmitted to a focusing motor, namely a focus position change instruction, due to manual operation of a shooting person. In other words, the focus motor performs the position change control of the real focus only when receiving the focus position change instruction. When the focusing motor receives a focus position change instruction, the rotation circle number of the hand wheel type focusing signal transmitting end corresponds to the rotation circle number of the motor shaft, namely corresponds to the position change quantity of the real focus.
The virtual camera needs to generate a virtual image (with a virtual focus), then transmit the virtual image to the ring screen host, process the virtual image by the ring screen host (without affecting the virtual focus position), and then transmit the virtual image to the ring screen for display.
After the real image and the virtual image are obtained at first, the real focus and the virtual focus are not directly overlapped, but are matched, specifically, the real focus position of the real camera and the virtual focus position of the virtual camera are changed, so that the visual effects of the real image and the virtual image are consistent or similar, and a functional relation which is required to be met by the position change of the real focus and the virtual focus under the condition that the visual effects of the real image and the virtual image are consistent or similar is established. In general, when the visual effects of the real image and the virtual image are consistent or similar, the quality of the virtual film-forming sheet obtained by superposition is higher, and therefore, when the position of the real focus is changed, the position of the virtual focus is also preferably adaptively changed, so that the visual effects of the real image and the virtual image are kept consistent or similar. It can be understood that, because the position changes of the hand wheel type focusing signal transmitting end and the real focus have a given functional relationship, the functional relationship corresponding to the rotation circle number (or angle) of the hand wheel type focusing signal transmitting end and the position change of the virtual focus can be obtained by means of the functional relationship when the position changes of the real focus and the virtual focus are matched.
The real camera is in signal connection with the virtual camera through the hand wheel type focusing signal transmitting end, that is, whether the virtual camera can receive the focus position change instruction or not is controlled by the hand wheel type focusing signal transmitting end. In this embodiment, the hand wheel type focusing signal transmitting end always transmits the focus position change instruction to the virtual camera, that is, as long as the photographer generates an operation action on the hand wheel type focusing signal transmitting end, the virtual camera can receive the relevant signals. Therefore, as long as a photographer operates the hand wheel type focusing signal transmitting end, the virtual camera can adjust and adaptively change the position of the virtual focus according to the functional relationship corresponding to the rotation circle number (or angle) of the hand wheel type focusing signal transmitting end and the position change of the virtual focus.
Step S2: and setting a safety area in the middle of the annular curtain, and enabling the initial position of the real focus to be positioned in the safety area. The safe area is an area where neither the real image nor the virtual image generates near-view blur nor far-view blur when the real focus and the virtual focus are located in the area. Accordingly, when the real focus and/or the virtual focus are located in the safe area, the real image and/or the virtual image cannot generate obvious near view blur and far view blur, and accordingly, the virtual film forming quality is high, and when the real focus is located in the safe area, the virtual focus moves along with the position change of the real focus, so that the visual effects of the real image and the virtual image are consistent or similar.
Step S3: and establishing signal connection between the real camera and the ring screen host. Specifically, the hand wheel type focusing signal transmitting end is in signal connection with the annular curtain host, so that the hand wheel type focusing signal transmitting end can always transmit a generated focus position change instruction to the annular curtain host.
Step S4: when the real camera receives the focus position change instruction, the real camera sends the focus position change instruction to the ring screen host, and the ring screen host firstly judges whether the changed real focus position is still in a safe area or not if the focusing motor executes the focus position change instruction to change the real focus position.
If the changed real focus leaves the safe area, it means that if the focus position change instruction is executed, the real image will generate near view blur or far view blur, meanwhile, because the virtual focus will also generate motion due to the focus position change instruction, the virtual image will also generate near view blur or far view blur, finally, the virtual film will generate obvious near view blur and far view blur, the imaging quality is poor, even if the shooting process is repeated, the above problems still exist, and are difficult to be relieved, therefore, the ring curtain host machine will send a negative instruction to the hand wheel type focusing signal transmitting end, the hand wheel type focusing signal transmitting end will not send the focus position change instruction to the focusing motor according to the negative instruction, so as to refuse to execute the focus position change instruction, avoid the change of the real focus position, and therefore, the real image can maintain better definition. At this time, although the virtual camera responds to the focus position change instruction to cause the virtual image to generate near-view blur or far-view blur, and the real focus is not matched with the virtual focus, compared with the situation that the real image and the virtual image generate near-view blur or far-view blur simultaneously in the prior art, the virtual film-making film-forming blurring effect is effectively inhibited, meanwhile, the virtual image is relied on to generate near-view blur or far-view blur, the film-forming can also display the visual blurring effect change caused by focus position change, and the film-forming quality and the authenticity are always improved.
Otherwise, if the changed real focus does not leave the safety area, it indicates that even if the focus position change instruction is executed, the real image and the virtual image will not generate near view blur or far view blur, so that the final film is still clear, therefore, the ring curtain host machine will send a positive instruction to the hand wheel type focusing signal transmitting end based on the judging result, and the hand wheel type focusing signal transmitting end sends the focus position change instruction to the focusing motor based on the positive instruction, so as to control the motor shaft of the focusing motor to rotate, so that the position of the real focus is matched with the virtual focus position together and changed and moves in the safety area.
The method for the ring curtain host to obtain the position of the real focus after the focus position change instruction is supposed to be executed is as follows: firstly, the current real focus position is obtained, then the rotation number (or angle) of the hand wheel type focusing signal transmitting end is obtained, the position change quantity of the real focus which can be generated by the hand wheel type focusing signal transmitting end is obtained based on the rotation number (or angle) of the hand wheel type focusing signal transmitting end, and therefore the position of the real focus after the focus position change instruction is supposed to be executed is obtained by combining the current real focus position and the real focus position change quantity caused by the execution of the focus position change instruction.
When the virtual focus is located outside the safety area and the real focus is located inside the safety area, the virtual focus can be returned to the safety area again by controlling the hand wheel type focusing signal transmitting end, and in the process, the real focus can be further moved into the safety area, and correspondingly, the virtual focus is not matched with the real focus when the virtual focus just returns to the safety area. Accordingly, there is a need to re-match the real focus when the virtual focus returns to within the safe area. In order to conveniently and quickly re-match the virtual focus with the real focus, in the first matching process of the real focus and the virtual focus, the corresponding relation between the torque current of the focusing motor and the position of the virtual focus is recorded by the ring screen host, and the corresponding relation between the torque current of the focusing motor and the position of the real focus exists, so that the corresponding relation between the torque current and the position of the virtual focus essentially reflects the corresponding positional relation when the real focus and the virtual focus are matched. The ring curtain host acquires position information of the virtual focus after the virtual focus returns to the safety area from the virtual camera, the position information is transmitted to the hand wheel type focusing signal transmitting end, and the hand wheel type focusing signal transmitting end transmits the signal to the focusing motor, so that the focusing motor is quickly regulated to corresponding torque current, and quick re-matching of the real focus and the virtual focus is realized. The ring curtain host acquires the position information of the virtual focus from the virtual camera in real time, when the virtual focus returns to the safe area, the ring curtain host automatically sends a matching execution signal to the hand wheel type focusing signal transmitting end, the hand wheel type focusing signal transmitting end forwards the matching execution signal to the focusing motor,
In this embodiment, the hand wheel type focusing signal transmitting end is connected to the focusing motor through an nrf point-to-point protocol, so as to improve the real-time signal transmissibility between the hand wheel type focusing signal transmitting end and the focusing motor. Because the ring curtain host does not have nrf equipment, the hand wheel type focusing signal transmitting end adopts an OSC protocol with higher universality to be connected with the ring curtain host in a signal mode, so that the nrf equipment is prevented from being arranged outside the ring curtain host, and meanwhile, the OSC protocol and the point-to-point are not mutually interfered, so that signal transmission is relatively stable.
More specifically, the hand wheel type focusing signal transmitting end comprises a hand wheel, an encoder connected with the hand wheel and a singlechip electrically connected with the encoder, wherein the singlechip is electrically connected with the focusing motor, and the singlechip is wirelessly connected to the ring curtain host through an OSC protocol. The encoder can record the rotation direction and rotation angle of the hand wheel so as to establish a functional relation corresponding to the rotation circle number (or angle) of the hand wheel type focusing signal transmitting end and the position change of the virtual focus, and a functional relation corresponding to the rotation circle number (or angle) of the hand wheel type focusing signal transmitting end and the position change of the real focus when the focusing motor rotates, and can also establish a functional relation between the rotation circle number (or angle) of the hand wheel type focusing signal transmitting end and the torque current of the focusing motor.
Preferably, the hand wheel type focusing signal transmitting end further comprises a control screen connected with the singlechip, the control screen can display the information of the functional relation and the like by means of the singlechip, and the singlechip is required to play the role of signal transmission and synchronously draw with the display content of the control screen, so that the singlechip is provided with the dual-core processor to improve the running rate of the singlechip and meet the working requirements in the embodiment.
The clockwise rotation and the anticlockwise rotation of the hand wheel respectively control the increase and the decrease of the focusing value, in order to facilitate shooting personnel with different hands, the singlechip is provided with a reverse control button, and the shooting personnel presses the reverse control button to send a signal to the singlechip, so that the clockwise rotation and the anticlockwise rotation of the hand wheel respectively control the decrease and the increase of the focusing value.
In addition, in this embodiment, the focusing motor has a self-checking mode, and the self-checking mode is executed based on a self-checking instruction sent by the focusing motor by the hand wheel type focusing signal transmitting end.
The specific process of the self-checking mode is as follows: after receiving the self-checking instruction, the focusing motor firstly records the current torque current A, then respectively obtains a positive torque current maximum value A max1 and a negative torque current maximum value A max2 through positive rotation and negative rotation, and builds a progress bar by taking A max1 and-A max2 as end point values, wherein the torque current is larger when the focusing motor is positive to limit and the torque current is negative to limit, and symbols in front of-A max2 represent motor reverse rotation. Meanwhile, the corresponding relation between the rotation number (or angle) of the hand wheel relative to the initial position and the torque current can be established. After the progress bar is established, the focusing motor rotates to a state (torque current A) before receiving the self-checking instruction, a current hand wheel rotation state is found, a position corresponding to the current hand wheel rotation state is marked in the progress bar, and finally the progress bar is stored in a memory and transmitted to a hand wheel type focusing signal transmitting end.
After restarting, the focusing motor can quickly return to the torque current and the rotation direction before shutdown through the progress bar, and is quickly connected with the last shooting process.
Example 2:
The present embodiment is different from embodiment 1 in that the hand wheel type focusing signal transmitting end does not always transmit a focus position change instruction to the virtual camera, but decides whether to transmit to the virtual camera based on a negative instruction and a positive instruction. Therefore, the virtual focus and the real focus always correspond, if the real focus does not leave the safety area, the virtual focus does not leave the safety area, the real image and the virtual image do not generate near vision blurring and far vision blurring, and finally the quality of the film is fully ensured.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. A virtual-real camera picture shooting method is characterized by comprising the steps of,
Establishing signal connection between a real camera and a virtual camera, wherein the virtual camera is electrically connected to a ring screen host, the ring screen host is electrically connected to a ring screen, the real camera shoots the ring screen, and a real image shot by the real camera and a virtual image transmitted to the ring screen host by the virtual camera are overlapped;
setting a safety area in the middle of the annular curtain, and enabling the initial position of the real focus to be located in the safety area;
establishing signal connection between a real camera and a ring screen host;
When the real camera receives the focus position change instruction, the real camera sends the focus position change instruction to the annular curtain host, and the annular curtain host judges whether the real focus leaves a safe area later if the real camera executes the focus position change instruction according to the focus position change instruction and the current position of the real focus;
If the ring curtain host judges that the real focus leaves the safe area, a negative instruction is sent to the real camera, and the real camera refuses to execute the focus position change instruction according to the negative instruction;
If the ring curtain host judges that the real focus does not leave the safety area, a positive instruction is sent to the real camera, and the real camera executes the focus position change instruction according to the positive instruction so as to enable the real focus to move in the safety area.
2. The method according to claim 1, wherein the real camera includes a handwheel type focusing signal transmitting end, a focusing motor electrically connected to the handwheel type focusing signal transmitting end, and a real lens for real focus position control by the focusing motor, the handwheel type focusing signal transmitting end is signal-connected to the ring screen host, and the handwheel type focusing signal transmitting end determines whether to control the focusing motor to rotate according to the received positive or negative command.
3. The virtual-to-real camera picture photographing method according to claim 2, wherein the real focus and the virtual focus are matched before the real image and the virtual image are superimposed.
4. A virtual-real camera image shooting method according to claim 3, wherein the hand wheel type focusing signal transmitting end always transmits a focus position change instruction to the virtual camera, and the virtual camera adjusts the position of the virtual focus according to the focus position change instruction.
5. The method for capturing pictures with a virtual camera according to claim 4, wherein,
In the matching process of the real focus and the virtual focus, the ring curtain host records the corresponding relation between the torque current of the focusing motor and the position of the virtual focus;
If the virtual focus moves from outside the safety area to inside the safety area, the ring curtain host sends a matching execution signal to the focusing motor, and the focusing motor performs torque adjustment according to the position of the virtual focus in the safety area after receiving the matching execution signal so as to enable the real focus to be matched with the virtual focus again.
6. The method for photographing a virtual-real camera picture according to claim 2, wherein if the hand wheel type focusing signal transmitting terminal transmits a self-checking command to the pair Jiao Dianji, the focusing motor firstly records the current torque current a after receiving the self-checking command, then respectively obtains the positive torque current maximum value a max1 and the negative torque current maximum value a max2 through positive rotation and negative rotation, constructs a progress bar by taking the A max1 and the-A max2 as end points, then rotates the focusing motor to a state before receiving the self-checking command, marks a position corresponding to the current state in the progress bar, and finally stores the progress bar into the memory and transmits the progress bar to the hand wheel type focusing signal transmitting terminal.
7. The method of claim 2, wherein the handwheel type focusing signal transmitting end is connected with the ring screen host through OSC protocol, and the handwheel type focusing signal transmitting end is connected to the focusing motor through nrf point-to-point protocol.
8. The method of claim 2, wherein the hand wheel type focusing signal transmitting end comprises a hand wheel, an encoder connected with the hand wheel and a single chip microcomputer electrically connected with the encoder, the single chip microcomputer is electrically connected with the focusing motor, and the single chip microcomputer is wirelessly connected to the ring screen host.
9. The method of claim 8, wherein the hand wheel type focusing signal transmitting end further comprises a control screen electrically connected with a single chip microcomputer, and the single chip microcomputer is provided with a dual-core processor.
10. The method of claim 9, wherein the singlechip has a reverse control button, and the rotation direction of the focusing motor controlled by the hand wheel is opposite before and after the reverse control button is triggered.
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