CN109765798B - Semi-physical simulation system for film and television photography - Google Patents
Semi-physical simulation system for film and television photography Download PDFInfo
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Abstract
The invention relates to a semi-physical simulation system for film and television photography, and belongs to the technical field of digital photography and virtual simulation. The system comprises a photographic equipment model module, a sensor, a peripheral module, an embedded module and a display and control module; the photographic equipment model module comprises a camera, a lens and a holder model; the lens model comprises a focal length ring, a focus following ring and a diaphragm ring; the holder model also comprises a rolling structure and a pitching structure; the sensor and peripheral module comprises an encoder, a potentiometer, a rocker and a switch button; the display and control module comprises a control unit, an input unit, a processing unit and a display unit; the system comprises a data processing plug-in and a three-dimensional graphic engine; the connection relationship of the system is as follows: the camera equipment model module is connected with the sensor and the peripheral module, the sensor and the peripheral module are connected with the embedded system module, and the embedded system module is connected with the display and control module. The system has extremely low price and reduces the cost of virtualization manufacturing.
Description
Technical Field
The invention relates to a semi-physical simulation system for film and television photography, and belongs to the technical field of digital photography and virtual simulation.
Background
With the development of the film and television industry, the demand for virtual photography of movies is increasing.
In the movie virtual photography system, the user's mind requires virtual photography by a relatively complicated keyboard and mouse. These complicated, not intuitive operations can occupy more time, influence work efficiency.
Therefore, the scientific and practical film and television photography semi-physical simulation system has a great application prospect. The photographer can intuitively input his or her own ideas into the computer through a scientific and practical semi-physical simulation system.
Disclosure of Invention
The invention aims to provide a film and television photography semi-physical simulation system which is the same as real photography operation and accords with the operation habit of a photographer, aiming at the requirements of semi-physical simulation equipment in the existing film virtualization production.
In order to solve the technical problems and achieve the purpose of the invention, the following technical scheme is adopted:
a semi-physical simulation system for film and television photography comprises a photographic equipment model module, a sensor and peripheral module, an embedded module and a display and control module;
the camera equipment model module specifically comprises a camera model, a lens model and a holder model; the camera model comprises a switch button installation interface and an embedded system module installation structure; the lens model comprises a focal length ring, a focus following ring and an aperture ring; the holder model also comprises a rolling structure and a pitching structure;
the sensor and peripheral module comprises four encoders, two potentiometers, two rockers and five switch buttons;
the embedded system module comprises an embedded system and a circuit;
the hardware in the display and control module comprises a control unit, an input unit, a processing unit and a display unit; the software running in the processing unit includes a data processing plug-in and a three-dimensional graphics engine.
The connection relationship of each module in the digital camera virtual simulation system is as follows:
the camera equipment model module is connected with the sensor and the peripheral module, the sensor and the peripheral module are connected with the embedded system module, and the embedded system module is connected with the display and control module;
the installation process of each module in the digital camera virtual simulation system is as follows:
1) the installation photography equipment model module is the main part, specifically is: the camera model is provided with a switch button through a switch button interface; on the lens model, one encoder A is arranged on a focal length ring, the other encoder A is arranged on a focus following ring, and one potentiometer is arranged on an aperture ring; on the tripod head model, one encoder B is arranged on the rolling structure, and the other encoder B is arranged on the pitching structure; mounting the lens model on the camera model, and then integrally mounting the lens model and the camera model on the holder model;
2) damping mechanisms are added to a focal length ring, a focal point ring and an aperture ring in a lens model to simulate the operation hand feeling of real photographic equipment;
3) connecting the sensor and the peripheral module to the embedded system module through a lead;
4) the embedded system module is fixed on the camera model based on a physical mode;
5) and connecting the embedded system module to the display and control module in a wired or wireless mode.
The camera equipment model module simulates and simulates real camera equipment;
the sensor and the peripheral module acquire the motion information of the photographic equipment model module;
the embedded system module converts the obtained signals into data which can be identified by the display and control module;
the display and control module acquires the photographic motion data, and generates and displays a simulation picture by using a three-dimensional graphic engine.
The working process of the film and television photography semi-physical simulation system comprises the following steps:
step 1, manually operating a photographic equipment model module to enable a focal length ring, a focal point ring and a diaphragm ring on a lens model to be respectively linked with two encoders A and a potentiometer A to move, and enabling a rolling structure and a pitching structure on a holder model to be respectively linked with two encoders B to move. And operating the button and the rocker to move correspondingly;
step 2, the sensor and the peripheral module acquire motion information, convert the motion information into an electric signal and transmit the electric signal to the embedded system module;
wherein, the obtained data respectively comprise the following data:
the angle of a roll shaft, the angle of a pitch shaft, a focal length, a focus coordinate, the size of an aperture, the angle of a roll shaft, X-axis, Y-axis and Z-axis coordinates and an on-off state;
step 3, the embedded system module reads the electric signals acquired from the sensor and the peripheral module and converts the electric signals into data, and a data type identifier is added into the data to distinguish the data type in the step 2;
step 4, the embedded system module transmits the data to the display and control module in a wired or wireless way;
step 5, the display and control module acquires data and carries out simulation processing on the data;
the data processing comprises the following steps: the proportion of the transverse rocking shaft and the pitching shaft is converted; nonlinear transformation and proportional transformation of focal length, focus and aperture data; the proportion of a transverse rolling shaft, an X axis, a Y axis and a Z axis is converted;
step 6, simulating the motion of a camera in a three-dimensional graph engine according to the obtained data, and generating a virtual simulation picture by the three-dimensional graph engine according to the three-dimensional assets;
and 7, generating a display unit of the virtual simulation picture displayed on the display and control module in the three-dimensional graphic engine.
Advantageous effects
Compared with the existing virtual photography technology, the semi-physical simulation system for film and television photography has the following beneficial effects:
1. the appearance and the operation habit of the system accord with the real shooting habit of film and television workers, and the system is more beneficial to the operation of the film and television workers;
2. compared with other mature virtual photographic systems, the system has extremely low price, and reduces the cost required by the development of the virtualization manufacturing work;
3. and a high-precision sensor is adopted, so that the data acquired by the camera is more accurate, and the virtual photography is more accurate and real.
4. The preparation and erection work of the system only needs a small amount of time, and a film producer can quickly start the work of virtual photography;
5. the system only needs less space for use and operation, and can carry out virtual photography work in more places.
Drawings
FIG. 1 is a block diagram of a semi-physical simulation system for film and television photography;
fig. 2 is a flow chart illustrating operation of the video photography semi-physical simulation system of fig. 1.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention. The drawings are for illustrative purposes only and are not to be construed as limiting the patent.
Examples
FIG. 1 is an architecture diagram of a semi-physical simulation system for film and television photography; as can be seen from fig. 1, the connection relationship of the modules in the film and television photography semi-physical simulation system is as follows:
the photographic equipment model module is physically and fixedly connected with the sensor and the peripheral module; the sensor and the peripheral module are connected with the embedded system module through signal transmission; the embedded system module is connected with the display and control module through data transmission; the camera equipment model module is physically and fixedly connected with the embedded system module.
In specific implementation, the sensor and peripheral module comprises four encoders, two potentiometers, two rockers and five switch buttons;
the operation flow of the film and television photography semi-physical simulation system is shown in fig. 2.
Fig. 2 is a flowchart illustrating an operation of a system architecture of the semi-physical simulation system for film and television photography illustrated in fig. 1.
As can be seen from fig. 2, the camera equipment model module is connected to the sensors and peripheral modules based on physical transmission; the sensor and the peripheral module are connected with the embedded system module through signal transmission; the embedded system module is connected with the display and control module through data transmission; the display and control module displays the transmitted data.
When the simulation system is manufactured and installed, the following steps are performed:
in this example, a camera model module having the same operation structure as that of a real camera is manufactured by using processing methods such as a 3D printing technology and a computer numerical control machining technology;
the accuracy of the encoder installed in the system reaches 36000 lines/360 degrees, and most of the cases exceed the accuracy which can be perceived by people. The accuracy of the potentiometer is determined by the embedded system module, the accuracy in the potentiometer forming range is 1024 subdivisions, and the requirements of corresponding functions can be met. The switch button adopts a common lock-free button;
the embedded system module uses AduinoDUE, and still has a sufficiently high refresh rate when processing more data, which is far higher than the frame rate of a film which is 24 frames per second and the refresh rate of the current mainstream computer screen which is 60 Hz;
the display and control module is a computer and peripheral equipment thereof, wherein the peripheral equipment comprises a computer host, a display, a mouse and a keyboard;
the software running in the computer is a data processing plug-in, a three-dimensional graphic engine illusion engine 4.
The working content of the simulation system is characterized by comprising the following points:
(1) the complete holder model is provided with a transverse rocking shaft and a pitching shaft, and the physical holder is provided with damping to truly simulate the holder operation;
(2) the lens has a complete focal length ring, a focus ring and an aperture ring, and has numerical value nonlinear mapping consistent with a real lens, so that the use experience is more real;
(3) the rocker can control the position of the mobile camera, so that a user can complete large-scale virtual photography in a narrow space conveniently;
the above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (2)
1. A semi-physical simulation system for film and television photography comprises a photographic equipment model module, a sensor and peripheral module, an embedded module and a display and control module;
the camera equipment model module specifically comprises a camera model, a lens model and a holder model; the camera model comprises a switch button installation interface and an embedded system module installation structure; the lens model comprises a focal length ring, a focus ring and an aperture ring; the holder model also comprises a rolling structure and a pitching structure;
the sensor and peripheral module comprises an encoder, a potentiometer, a rocker and a switch button;
the embedded system module comprises an embedded system and a circuit;
the hardware in the display and control module comprises a control unit, an input unit, a processing unit and a display unit; the software running in the processing unit comprises a data processing plug-in and a three-dimensional graphic engine;
the connection relation of each module in the film and television photography semi-physical simulation system is as follows:
the camera equipment model module is connected with the sensor and the peripheral module, the sensor and the peripheral module are connected with the embedded system module, and the embedded system module is connected with the display and control module;
the camera equipment model module simulates and simulates real camera equipment;
the sensor and the peripheral module acquire the motion information of the photographic equipment model module;
the embedded system module converts the obtained signals into data which can be identified by the display and control module;
the display and control module acquires photographic motion data, and generates and displays a simulation picture by using a three-dimensional graphic engine;
the working process of the film and television photography semi-physical simulation system comprises the following steps:
step 1, manually operating a photographic equipment model module to enable a focal length ring, a focal point ring and a diaphragm ring on a lens model to be respectively linked with an encoder and a potentiometer to move, enabling a rolling structure and a pitching structure on a holder model to be linked with the encoder to move, and operating a button and a rocker to do corresponding movement;
step 2, the sensor and the peripheral module acquire motion information, convert the motion information into an electric signal and transmit the electric signal to the embedded system module;
wherein, the obtained data respectively comprise the following data:
the angle of a roll shaft, the angle of a pitch shaft, a focal length, a focus coordinate, the size of an aperture, the size of a roll shaft, X-axis, Y-axis and Z-axis coordinates and an on-off state;
step 3, the embedded system module reads the electric signals acquired from the sensor and the peripheral module and converts the electric signals into data, and a data identifier is added into the data;
step 4, the embedded system module transmits the data to the display and control module in a wired or wireless way;
step 5, the display and control module acquires data and carries out simulation processing on the data;
the simulation processing of the data comprises the following operations: the conversion ratio of the transverse rocking shaft and the pitching shaft; nonlinear transformation and conversion proportion of focal length, focal point and aperture data; the conversion ratio of a transverse rolling shaft, an X axis, a Y axis and a Z axis;
step 6, simulating the motion of a camera in a three-dimensional graph engine according to the obtained data, and generating a virtual simulation picture by the three-dimensional graph engine according to the three-dimensional assets;
and 7, generating a display unit of the virtual simulation picture displayed on the display and control module in the three-dimensional graphic engine.
2. The semi-physical simulation system for film and television photography according to claim 1, wherein: the installation process of each module in the system is as follows:
1) the installation photography equipment model module is the main part, specifically is: the camera model is provided with a switch button through a switch button interface; on the lens model, one encoder A is arranged on a focal length ring, the other encoder A is arranged on a focus following ring, and one potentiometer is arranged on an aperture ring; on the tripod head model, one encoder B is arranged on the rolling structure, and the other encoder B is arranged on the pitching structure; mounting the lens model on the camera model, and then integrally mounting the lens model and the camera model on the holder model;
2) damping mechanisms are added to a focal length ring, a focal point ring and an aperture ring in a lens model to simulate the operation hand feeling of real photographic equipment;
3) connecting the sensor and the peripheral module to the embedded system module through a lead;
4) the embedded system module is fixed on the camera model based on a physical mode;
5) and connecting the embedded system module to the display and control module in a wired or wireless mode.
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| CN115396603B (en) * | 2022-08-23 | 2023-05-16 | 广州呗呗科技有限公司 | Virtual film-making focusing synchronization system, method, storage medium and electronic equipment |
| CN117742540A (en) * | 2024-02-20 | 2024-03-22 | 成都流体动力创新中心 | Virtual-real interaction system based on virtual engine and semi-physical simulation |
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