Tracking shooting mechanism convenient to adjust and use method

Abstract

The invention relates to the technical field of camera shooting, particularly discloses a tracking shooting mechanism convenient to adjust and a use method, and is used for solving the problem that the face cannot be tracked in the prior art. Comprising a sliding rail, the sliding rail is of an arc-shaped structure, the sliding rail is distributed with a stage as the circle center, a sliding seat is arranged on the sliding rail in a sliding mode, the sliding seat is connected with a horizontal displacement piece used for driving the sliding seat to rotate around the stage center, and a vertical sliding seat is arranged on the surface of the sliding seat in a sliding mode. The vertical sliding base is connected with a lifting unit used for driving the vertical sliding base to move up and down, and a camera shooting assembly used for obtaining face information of actors is installed on the side face of the vertical sliding base. The device is designed according to existing needs, an operator only needs to grasp the shooting direction in a large direction, the camera can carefully capture and shoot face information of an actor, the operator does not need to carry out refined operation, the shooting quality is guaranteed, and the labor intensity is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of camera technology, in particular to a tracking shooting mechanism convenient to adjust and a use method. BACKGROUND

[0002] The tracking shooting equipment for making three-dimensional animation mainly has optical motion capture and inertial motion capture. The existing inertial motion capture needs a data collector to collect information of an actor wearing an inertial motion capture device for assisting the making of three-dimensional animation when actually operated. However, in the process of shooting, the shooting personnel need to concentrate on the screen of the data collector in order to improve the shooting effect. The patent with the patent announcement number CN117641128B records a tracking shooting device and a shooting method for making three-dimensional animation. When the distance sensor detects that the distance between the shooting personnel and the actor is close, the servo motor rotates to make the data collector away from the actor, so as to avoid the problem that the actor moves out of the picture when the shooting personnel cannot react in time. However, the shooting distance is only controlled, and the facial expression of the actor cannot be locked, that is, the facial angle information of the shooting cannot be locked in real time. Sometimes, only the side face information can be obtained due to the rotation of the face. Therefore, the present application provides a tracking shooting device and a shooting method for making three-dimensional animation to meet the needs. SUMMARY

[0003] The present application aims to provide a tracking shooting mechanism convenient to adjust and a use method, and solves the problem that the face cannot be tracked in the prior art.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0005] The tracking shooting mechanism convenient to adjust comprises a sliding rail, the sliding rail is in an arc structure, the sliding rails are distributed with the stage as the center, a sliding seat is slidably arranged on the sliding rail, the sliding seat is connected with a horizontal displacement member for driving the sliding seat to rotate around the center of the stage, a vertical sliding seat is slidably arranged on the surface of the sliding seat, the vertical sliding seat is connected with a lifting unit for driving the vertical sliding seat to move up and down, and a camera assembly for obtaining facial information of an actor is installed on the side surface of the vertical sliding seat.

[0006] On the basis of the above-mentioned technical solutions, the present application further provides the following optional technical solutions:

[0007] In an optional scheme, the camera assembly comprises a horizontal push rod fixed on the surface of the vertical sliding seat, the output end of the horizontal push rod is connected with a U-shaped frame, a guide is arranged between the U-shaped frame and the vertical sliding seat, a second camera motor is mounted on the side surface of the U-shaped frame, a turnover block is fixed on the output end of the second camera motor, a first camera motor is mounted on the turnover block, and the output end of the first camera motor is connected with the bottom of the camera.

[0008] In an optional scheme, the guide comprises a horizontal guide rod fixed on the vertical sliding seat, a horizontal guide sleeve is sleeved on the horizontal guide rod, and the other end of the horizontal guide sleeve is connected with the U-shaped frame.

[0009] In an optional scheme, the surface of the vertical sliding seat close to the vertical rod is provided with a roller, and the roller is in pressure contact with the vertical rod.

[0010] In an optional scheme, the lifting unit comprises a vertical screw hole arranged on the vertical sliding seat, a vertical screw rod is matched in the vertical screw hole, the upper end of the vertical screw rod is rotationally connected with the fixed block on the outer side of the vertical rod, the lower end of the vertical screw rod is connected with the output end of a vertical motor, and the vertical motor is mounted on the outer side of the vertical rod.

[0011] In an optional scheme, the horizontal displacement member comprises a tooth ring arranged on the outer side of the sliding rail, a horizontal motor is further mounted on the sliding seat, a horizontal gear is arranged on the output end of the horizontal motor, and the horizontal gear is in meshing connection with the tooth ring.

[0012] In an optional scheme, the sliding rail is provided with a lubricating oil groove.

[0013] In an optional scheme, the turnover block is further provided with a light supplement lamp for supplementing light for the camera.

[0014] Compared with the prior art, the present application has the following advantages:

[0015] The present application is designed according to the existing needs, the operator only needs to grasp the shooting direction in a general direction, the camera can carefully capture the facial information of the shooting actor, and the operator does not need to perform fine operation, so that the shooting quality is guaranteed and the labor intensity is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic view of one side of the present application.

[0017] Figure 2 It is a structural schematic view of the other side of the present application.

[0018] Figure 3 It is a structural schematic view of the camera assembly of the present application.

[0019] Figure 4This is a logic block diagram of the adjustment of the camera assembly of the present invention.

[0020] Reference numerals: sliding seat 100 , sliding rail 101 , gear ring 102 , horizontal motor 103 , horizontal gear 104 , vertical motor 105 , vertical screw 108 , vertical sliding seat 107 , fixing block 109 , vertical rod 110 ;

[0021] Camera assembly 200 , horizontal push rod 201 , U-shaped frame 202 , camera head 203 , flip block 204 , first camera motor 205 , second camera motor 206 , horizontal guide sleeve 207 , horizontal guide rod 208 . DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0023] like Figures 1-4 As shown, an embodiment of the present invention provides a tracking and shooting mechanism that is easily adjustable, including a sliding rail 101. The sliding rail 101 is an arc-shaped structure and is distributed with the stage as the center of the circle. A sliding seat 100 is slidably provided on the sliding rail 101. The sliding seat 100 is connected to a horizontal displacement member for driving it to rotate around the center of the stage. A vertical slide 107 is slidably provided on the surface of the sliding seat 107. The vertical slide 107 is connected to a lifting unit for driving it to move up and down. A camera assembly 200 for acquiring facial information of the actor is installed on the side of the vertical slide 107. In this way, the position of the camera assembly 200 can be adjusted by the lifting unit and the horizontal displacement member, thereby adjusting the camera quality.

[0024] The camera assembly 200 includes a horizontal push rod 201 fixed to the surface of the vertical slide 107, the output end of the horizontal push rod 201 is connected to the U-shaped frame 202, a guide member is provided between the U-shaped frame 202 and the vertical slide 107, a second camera motor 206 is installed on the side of the U-shaped frame 202, the output end of the second camera motor 206 is fixed to a flip block 204, a first camera motor 205 is installed on the flip block 204, the output end of the first camera motor 205 is connected to the bottom of the camera 203, the flip block 204 is driven to rotate by the second camera motor 206, and the rotation angle is W2, and the camera 203 is driven to rotate by the first camera motor 205, and the rotation angle is W1, so that the camera angle of the camera 203 can be adjusted;

[0025] The guide comprises a horizontal guide rod 208 fixed on the vertical sliding seat 107, a horizontal guide sleeve 207 is sleeved on the horizontal guide rod 208 and is connected with the U-shaped frame 202 at the other end, when the U-shaped frame 202 moves horizontally, the horizontal guide sleeve 207 can slide along the horizontal guide rod 208, so that the horizontal movement of the U-shaped frame 202 is more stable;

[0026] The surface of the vertical sliding seat 107 close to the vertical rod 110 is provided with a roller, the roller is in abutting contact with the vertical rod 110, so that the sliding of the vertical sliding seat 107 is more stable;

[0027] The lifting unit comprises a vertical screw hole arranged on the vertical sliding seat 107, a vertical screw rod 108 is matched in the vertical screw hole, the upper end of the vertical screw rod 108 is rotationally connected with the fixed block 109 outside the vertical rod 110, the lower end of the vertical screw rod 108 is connected with the output end of the vertical motor 105, the vertical motor 105 is installed outside the vertical rod 110, under the driving of the vertical motor 105, the vertical screw rod 108 rotates relative to the vertical sliding seat 107, under the action of the screw thread, the vertical sliding seat 107 can slide along the surface of the vertical rod 110, so as to adjust the height of the camera;

[0028] The horizontal displacement unit comprises a gear ring 102 arranged outside the sliding rail 101, the sliding seat 100 is further provided with a horizontal motor 103, the output end of the horizontal motor 103 is provided with a horizontal gear 104, the horizontal gear 104 is meshed with the gear ring 102, under the rotation of the horizontal gear 104 driven by the horizontal motor 103, the horizontal gear 104 is matched with the gear ring 102, so as to drive the sliding seat 100 to move along the gear ring 102, so as to adjust the main direction of the camera;

[0029] The sliding rail 101 is provided with a lubricating oil groove, by adding lubricating oil, the friction loss is reduced:

[0030] The turnover block 204 is further provided with a light supplement lamp for supplementing light for the camera 203, so as to ensure the quality of the obtained image information.

[0031] Working principle: in actual use, the operator only needs to control the horizontal displacement unit and the lifting unit to work, under the rotation of the horizontal gear 104 driven by the horizontal motor 103, the horizontal gear 104 is matched with the gear ring 102, so as to drive the sliding seat 100 to move along the gear ring 102, so as to adjust the main direction of the camera, under the driving of the vertical motor 105, the vertical screw rod 108 rotates relative to the vertical sliding seat 107, under the action of the screw thread, the vertical sliding seat 107 can slide along the surface of the vertical rod 110, so as to adjust the height of the camera, so as to roughly control the shooting direction, and the specific fine capture is completed by the camera itself;

[0032] The camera assembly 200 acquires the face photo information, acquires the minimum cross-sectional information S1 of the face, calculates the ratio of S1 to S, S being the minimum cross-sectional information of the front face, and when the ratio is less than a set value, the camera assembly 200 automatically adopts an adjustment strategy to obtain the best face information.

[0033] Step 1) Construct the state observation vector s_t = [W1, W2, M, S1 / S, ΔM / Δt, N];

[0034] Step 2) Design the action space a_t = [ΔW1, ΔW2, ΔN], wherein:

[0035] ΔW1∈[-30°,+30°] / step

[0036] ΔW2∈[-15°,+15°] / step

[0037] ΔN∈[-200,+200]lux / step

[0038] Step 3) Define the reward function: Rt = α·(S1 / S)-β·∣ΔW∣-γ·∣ΔN / Nmax∣;

[0039] Wherein α = 0.6, β = 0.3, γ = 0.1, and |ΔW| is the absolute value of the pan angle change;

[0040] Step 4) Update the policy network parameters θ by PPO algorithm iteration to maximize the cumulative reward ∑R_t;

[0041] The S1 / S ratio calculation uses:

[0042] When S1 / S < 0.4, trigger the emergency light compensation strategy;

[0043] ΔN = 500*(0.4-S1 / S);

[0044] In traditional animation shooting, when facing the rotation of personnel's face, the traditional fixed camera shooting method cannot quickly and efficiently adjust the shooting angle, and the shooting angle is kept in the front of the actor. Now the face area information S is obtained by camera shooting, and when turning around, the face area obtained by side camera shooting is S1. The ratio of S1 to S reflects the rotation amplitude of the face, which can be a reference for camera movement. In this way, timely adjustment can be made to obtain face information. The information obtained: sensor node state information such as first camera rotation angle W1, second camera rotation angle W2, camera distance from face M, face pixel value H, camera with light compensation lamp, which can be turned on in time, and its illumination brightness N.

[0045] The above merely provides the preferred embodiment of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A tracking and shooting mechanism that is easy to adjust, comprising a sliding rail (101), wherein the sliding rail (101) is an arc-shaped structure, and is characterized in that: A sliding rail (101) is distributed with the stage as the center of a circle. A sliding seat (100) is slidably provided on the sliding rail (101). The sliding seat (100) is connected to a horizontal displacement member for driving the sliding seat to rotate around the center of the stage. A vertical sliding seat (107) is slidably provided on the surface of the sliding seat (100). The vertical sliding seat (107) is connected to a lifting unit for driving the vertical movement. A camera assembly (200) for acquiring facial information of an actor is installed on the side of the vertical sliding seat (107).

2. The easily adjustable tracking shooting mechanism according to claim 1, characterized in that: The camera assembly (200) comprises a horizontal push rod (201) fixed on the surface of a vertical slide (107); the output end of the horizontal push rod (201) is connected to a U-shaped frame (202); a guide member is provided between the U-shaped frame (202) and the vertical slide (107); a second camera motor (206) is installed on the side of the U-shaped frame (202); a flip block (204) is fixed to the output end of the second camera motor (206); a first camera motor (205) is installed on the flip block (204); and the output end of the first camera motor (205) is connected to the bottom of the camera head (203).

3. The easily adjustable tracking shooting mechanism according to claim 1, characterized in that: The guide member comprises a horizontal guide rod (208) fixed on the vertical slide (107); a horizontal guide sleeve (207) is provided on the sliding sleeve of the horizontal guide rod (208); and the other end of the horizontal guide sleeve (207) is connected to the U-shaped frame (202).

4. The easily adjustable tracking shooting mechanism according to claim 1, characterized in that: A roller is provided on the surface of the vertical slide (107) close to the vertical rod (110), and the roller is in pressing contact with the vertical rod (110).

5. The easily adjustable tracking shooting mechanism according to claim 1, characterized in that: The lifting unit comprises a vertical screw hole provided on a vertical slide (107), a vertical screw rod (108) being matched with the vertical screw hole, the upper end of the vertical screw rod (108) being rotatably connected to a fixed block (109) outside a vertical rod (110), and the lower end of the vertical screw rod (108) being connected to an output end of a vertical motor (105), and the vertical motor (105) being installed outside the vertical rod (110).

6. The easily adjustable tracking shooting mechanism according to claim 1, characterized in that: The horizontal displacement member comprises a gear ring (102) arranged outside the sliding rail (101); a horizontal motor (103) is also mounted on the sliding seat (100); a horizontal gear (104) is provided at the output end of the horizontal motor (103); and the horizontal gear (104) and the gear ring (102) are meshed with each other.

7. The easily adjustable tracking shooting mechanism according to claim 1, characterized in that: A lubricating oil groove is arranged on the sliding rail (101).

8. The easily adjustable tracking and shooting mechanism according to claim 2, characterized in that: The flip block (204) is also provided with a fill light for filling light for the camera (203).

9. A shooting method for the tracking shooting mechanism that is easy to adjust according to claim 1, characterized in that: The following steps are involved: Step 1: The operator only needs to control the horizontal moving parts and the lifting unit to make the camera assembly complete the overall adjustment of the horizontal position and height; Step 2: The camera component 200 works, and the camera component (200) obtains the human face photo information and the minimum face cross-sectional information S1. By calculating the ratio of S1 to S, S is the minimum cross-sectional information of the front of the human face. When the ratio is less than the set value, the camera component 200 will automatically adopt an adjustment strategy to obtain the best facial information.

10. The method for photographing a tracking and photographing mechanism that is easy to adjust according to claim 9, characterized in that: In step 2: the specific strategy is: Step A: Construct the state observation vector s_t = [W1, W2, M, S1 / S, ΔM / Δt, N] Step B: Design the action space a_t = [ΔW1, ΔW2, ΔN], where: ΔW1∈[-30°,+30°] / step; ΔW2∈[-15°,+15°] / step; ΔN∈[-200,+200]lux / step; Step C: Define the reward function: Rt = α·(S1 / S)-β·|ΔW|-γ·|ΔN / Nmax|, where α = 0.6, β = 0.3, γ = 0.1, and |ΔW| is the absolute value of the gimbal steering angle change; Step D: Iteratively update the policy network parameters θ through the PPO algorithm to maximize the cumulative reward ∑R_t. When S1 / S<0.4, trigger the emergency light filling strategy; ΔN=500*(0.4-S1 / S); The frontal area information of the face is S, the facial area obtained by the side camera when turning around is S1, the first camera angle is W1, the second camera angle is W2, the distance between the camera and the face is M, and the brightness of the fill light is N.

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