CN108551557B - Post preposition digital virtual film field system - Google Patents
Post preposition digital virtual film field system Download PDFInfo
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- CN108551557B CN108551557B CN201810357794.5A CN201810357794A CN108551557B CN 108551557 B CN108551557 B CN 108551557B CN 201810357794 A CN201810357794 A CN 201810357794A CN 108551557 B CN108551557 B CN 108551557B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/04—Synchronising
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/265—Mixing
Abstract
The invention discloses a post preposed digital virtual film court system which comprises a material library, a photographic device, a lens data acquisition device, a space positioning device, a material synthesis device, a storage display device and a time synchronization device, wherein the time synchronization device enables the time of the photographic device, the lens data acquisition device, the space positioning device, the material synthesis device and the storage display device to be synchronized in real time, and the space positioning device adopts a mode of combining a gyroscope positioner module and an optical positioning module. The post preposed digital virtual film court system adopting the structure has high-speed data transmission and signal feedback capacity, micron-order positioning accuracy and anti-interference capacity, ensures real-time synthesis of a physical environment and a virtual world, ensures smooth synchronization of director pre-monitoring, finds problems in a shooting process in time, prevents the occurrence of special effect manufacturing rework, enables film design, shooting and post-manufacturing to be carried out synchronously, and greatly shortens the film making period.
Description
Technical Field
The invention relates to the field of film and television, in particular to a post preposed digital virtual studio system.
Background
At present, the movie industry has gone for centuries, and the creation of art is more and more dependent on the development of technology. In the traditional production process of the film and television industry, the producer and the main creation group face the balance problem of the production cost, the production period and the quality of finished products, and meanwhile, the traditional production process has many problems, such as: the problems of inefficient communication, innovation risk and repeated modification between creative design and technical implementation are always puzzling each movie person. The traditional film making process comprises early stage preparation, asset development, middle stage shooting and post-stage production, and the smooth real-time synchronization of the early stage shooting and the visual effect production on the site cannot be realized, so that the post-stage production process is very troublesome, sometimes, the additional shooting is carried out, the production period is long, and the trouble and the expense are caused. In addition, in the traditional shooting process, no matter the foreground scene or the prop is used, the repeated utilization rate is low, and the workload and the resource waste in the process of producing the film are caused.
Disclosure of Invention
The invention aims to provide a post-stage preposition digital virtual film court system which has high-speed data transmission and signal feedback capacity, micron-order positioning accuracy and anti-interference capacity, ensures that a shooting site and a director are smoothly and synchronously pre-monitored, timely finds problems in the shooting process, prevents the occurrence of a rephotography condition, synchronously carries out the design, shooting and post-production of movie and television projects, greatly reduces the communication cost, improves the quality of works and shortens the film production period.
To achieve the above object, the present invention provides a post-stage pre-digital virtual title system comprising,
the material library comprises digital assets, an actor for moving and capturing with a positioning device, a physical prop with an optical mark point and a virtual camera which is synchronous with the real shooting camera in time-space and technical indexes;
the real shooting camera is provided with a camera space positioning device and a lens data acquisition device;
the lens data acquisition device comprises a gear set, a fixing frame, a connecting wire and an information processor.
The spatial positioning device comprises an optical positioning camera for collecting position data, an optical positioning switch, a motion capture server and the camera spatial positioning device positioned on the real shooting camera, wherein the collected data comprises the position and rotation data of the real shooting camera, the motion data of the motion capture actor and the position and rotation data of the physical prop;
the material synthesizing device comprises a data fusion switch for data fusion, an engine server and a DI T data server, wherein the DI T data server, a lens data acquisition device and the camera space positioning device are all connected with the data fusion switch;
the storage display device comprises a hard disk recorder, a field monitor, a background monitor, an airborne monitor and a video turner, wherein the engine server transmits fused video data to the hard disk recorder, the field monitor, the background monitor and the airborne monitor are all connected with the hard disk recorder, and the video turner is arranged between the field monitor and the hard disk recorder;
time synchronizer, including synchronizing box, synchronous generator and time code generator, synchronous generator with time code generator all is connected with synchronizing box, optics location switch with synchronizing box is connected, and time code generator sends unified time code for the camera of clapping in fact the synchronizing box with the hard disk recorder, synchronous generator sends synchronizing signal for the camera of clapping in fact the synchronizing box engine server and the hard disk recorder carries out data synchronization.
Preferably, at least one real-shooting camera is arranged, at least one group of storage display devices is arranged, and one real-shooting camera corresponds to one group of storage display devices.
Preferably, the real-time camera and the virtual camera are matched by the engine server through a real-time space positioning device, and the real-time camera accesses the video signal to the engine server to realize that the video signal is projected to the virtual scene in a set space proportion.
Preferably, the real-shooting camera and the virtual camera focus matching formula is as follows:
Fov＝aTan(36/f*2*k)*2，
fov is a virtual camera focal length, f is a real-shooting camera focal length, and k is a proportionality coefficient, so that when the real-shooting camera moves or the focal length changes, the focal length of the virtual camera changes, and accordingly, the virtual scene or the virtual-real synthetic scene displayed by the storage display device changes synchronously.
Preferably, the spatial calculation formula of the real-time camera projected to the virtual scene is as follows:
Sca l eX＝Tan(Fov/2)*L*2；
Sca l eY＝Sca l eX/P；
wherein Sca L eX is the ratio in X direction, L is the distance between the virtual camera and the imaging plane in the engine server, Sca L eY is the ratio in Y direction, and P is the resolution of the real-time camera.
Preferably, correct the real camera of shooing with virtual camera projects the virtual scene with film field inner space original point and ground central point, places the corrector that posts the optical marking point in the film field, acquires the real camera of shooing with the absolute position data of corrector barycenter, the virtual image of the corrector that virtual camera was shot is shown to the backstage monitor, superposes virtual image and real-time image signal for synthetic video, through removing the real camera of shooing observes the overlapping condition of real-time image and virtual image in the synthetic video, and the real-time image and the virtual image homoenergetic in the synthetic video can realize the coincidence completely under any motion of real camera of shooing.
Preferably, the gear set on the lens transmits the focal length and the focal length data to the information processor through a connecting line, and the information processor transmits the focal length and the focal length data to the engine server through the data fusion switch.
Preferably, the engine server obtains time codes of the spatial positioning device and the real-time camera, performs comparison and correction, and when the time codes are consistent, the engine server refreshes the fused data into position data of the spatial positioning device, so as to synchronize the real-time camera with the virtual camera, the field monitor, the background monitor and the airborne monitor.
Preferably, a gyroscope locator module in the camera spatial location device transmits the relative position data of the real shooting camera and the absolute location data acquired by the optical location switch to the data fusion switch for fusion, so as to reduce image jitter caused by vibration or shielding of the optical location data, wherein the absolute position is obtained by acquiring an optical location point on the real shooting camera through an optical location camera.
Therefore, the post-stage prepositive digital virtual film court system adopting the structure has the capabilities of high-speed data transmission and signal feedback, micron-level positioning accuracy, interference immunity, millisecond delay and accurate frequency locking, ensures real-time synthesis of a physical environment and a virtual world, ensures smooth synchronization of director pre-monitoring, finds problems in time in the shooting process, prevents the occurrence of special effect manufacturing rework, synchronously performs film design, shooting and post-stage manufacturing, and greatly shortens the film production period.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic structural diagram of a post-stage pre-digital virtual studio system according to the present invention.
Detailed Description
Examples
Fig. 1 is a schematic structural diagram of a post-stage pre-digital virtual studio system according to the present invention, and as shown in fig. 1, the post-stage pre-digital virtual studio system includes a material library, a photographing device, a spatial positioning device, a lens data acquisition device, a material composition device, a storage display device, and a time synchronization device.
The material library comprises digital assets, a moving capture actor with a positioning device, a physical prop with an optical mark point and a virtual camera which is synchronous with the real shooting camera in time-space and technical indexes. The creation of digital asset libraries as digital assets are continuously accumulated allows for repeated use and customization of upgrades.
The camera device comprises a real shooting camera and a light apparatus, wherein the real shooting camera is used for shooting video information, and a camera space positioning device and a lens data acquisition device are arranged on the real shooting camera. The number of the devices can be selected according to actual needs. The lens data acquisition device comprises a gear set, a fixing frame, a connecting wire and an information processor. The gear set on the lens transmits the focal length and the focal length data to the information processor through the connecting line, and the information processor transmits the focal length and the focal length data to the engine server through the data fusion switch, so that the acquisition of the lens data is realized.
The space positioning device comprises an optical positioning camera for collecting position data, an optical positioning switch and a camera space positioning device positioned on the real shooting camera, and the collected data comprises the position and rotation data of the real shooting camera, the action data of an action actor and the position and rotation data of a physical prop. The camera space positioning device comprises an optical mark point and a gyroscope positioner module which are fixed on the real shooting camera. The physical props collect corresponding position and rotation data through optical marking points. The relative positioning data of the camera is actually shot to the gyroscope locator module in the camera space positioning device, the optical positioning point that is located on the camera is actually shot in relative positioning data and the camera space positioning device is fused in the absolute positioning data transmission data fusion switch that the optical positioning camera gathered, reduce the image shake that the optical positioning data brought owing to vibrations or sheltering from, a lot of interferences at the scene shooting in-process, for example, vibrations, shelter from and the shake can all make the serious rocking of composite image, need shoot again when serious, make increase staff's work load and shooting cycle.
The material synthesizing device comprises a data fusion switch for data fusion, an engine server and a DI T data server. The DI T data server, the lens data acquisition device and the camera space positioning device are all connected with the data fusion switch. The DI T data service facilitates management or processing of image data by workers. The optical positioning switch is connected with the data fusion switch through the motion capture server, the engine server is connected with the data fusion switch, the real shooting camera is connected with the engine server, and data collected by the data fusion switch and video signals shot by the real shooting camera are transmitted to the engine server at the same time. The engine server performs matching synthesis on the real shooting camera and the virtual camera, and the real shooting camera accesses the video signal into the engine server to realize that the video signal is projected into the virtual scene in a set spatial proportion.
The method comprises the steps of correcting a real-time shooting camera and a virtual camera, projecting an original point of space in a film field and a ground central point into a virtual scene, placing a correcting body attached with an optical mark point in the film field, acquiring absolute position data of the mass center of the real-time shooting camera and the correcting body, displaying a virtual image of the correcting body shot by the virtual camera by a background monitor, superposing the virtual image and a real-time image signal into a synthetic video, and observing the overlapping condition of the real-time image and the virtual image in the synthetic video by moving the real-time shooting camera until the real-time image and the virtual image in the synthetic video can be completely overlapped under any motion of the real-time shooting camera. And shooting after correction, wherein the object to be captured is scratched through an engine server in the shooting process, and the virtual image and the real-time image signal are superposed into a synthetic video.
The real shooting camera and the virtual camera focus matching formula is as follows:
Fov＝aTan(36/f*2*k)*2，
wherein Fov is a virtual camera focal length, f is a real-shooting camera focal length, and k is a proportionality coefficient, when the real-shooting camera moves or the focal length changes, the focal length of the virtual camera changes, so that the virtual scene or the virtual-real synthetic scene displayed by the storage display device changes synchronously.
The spatial calculation formula of the real-shot camera projected to the virtual scene is as follows:
Sca l eX＝Tan(Fov/2)*L*2；
Sca l eY＝Sca l eX/P；
wherein Sca L eX is the ratio in X direction, L is the distance between the virtual camera and the imaging plane in the engine server, Sca L eY is the ratio in Y direction, and P is the resolution of the real-time camera.
When the real shooting camera moves or the focal length changes, the virtual camera changes, so that the virtual scene displayed by the storage display device changes. Not only the real shooting object moves, but also the virtual scene changes along with the real shooting camera, and the space-time synchronization of the special effect and the real shooting picture is realized.
The time synchronizer comprises a synchronizing box, a synchronizing generator and a time code generator, wherein the synchronizing generator and the time code generator are connected with the synchronizing box, the optical positioning switch is connected with the synchronizing box, the time code generator sends a uniform time code to the real shooting camera, the synchronizing box and the hard disk recorder, and the synchronizing generator sends a synchronizing signal to the real shooting camera, the synchronizing box, the engine server and the hard disk recorder to synchronize data. The engine server obtains the time codes of the space positioning device and the real shooting camera, carries out comparison and correction, and refreshes the fused data into the position data of the space positioning device when the time codes are consistent, so that the data synchronization of the real shooting camera, the field monitor, the background monitor and the airborne monitor is realized. The film production system has the advantages that problems can be found in time in the shooting process, the special effect production rework situation is prevented, film design, shooting and post production are carried out synchronously, and the film production period is greatly shortened.
The storage display device comprises a hard disk recorder, a field monitor, a background monitor, an onboard monitor and a video turner, wherein the engine server transmits fused video data to the hard disk recorder, the field monitor, the background monitor and the onboard monitor are all connected with the hard disk recorder, the video turner is arranged between the field monitor and the hard disk recorder, corresponding observation is conveniently carried out by a director according to the relation between actors and the position of the airplane, and meanwhile, the video turner can be additionally arranged between other monitors and the hard disk recorder according to actual conditions.
Therefore, the post-stage prepositive digital virtual film court system adopting the structure has the capabilities of high-speed data transmission and signal feedback, micron-level positioning accuracy, interference immunity, millisecond delay and accurate frequency locking, ensures real-time synthesis of a physical environment and a virtual world, ensures smooth synchronization of director pre-monitoring, finds problems in time in the shooting process, prevents the occurrence of special effect manufacturing rework, synchronously performs film design, shooting and post-stage manufacturing, and greatly shortens the film production period.
The above is a specific embodiment of the present invention, but the scope of the present invention should not be limited thereto. Any changes or substitutions that can be easily made by those skilled in the art within the technical scope of the present invention are included in the protection scope of the present invention, and therefore, the protection scope of the present invention is subject to the protection scope defined by the appended claims.
Claims (4)
1. A post-stage pre-digital virtual studio system, comprising: the system comprises a material library, a photographic device, a space positioning device, a material synthesizing device, a storage display device and a time synchronization device;
the material library comprises digital assets, an actor for moving and capturing with a positioning device, a physical prop with an optical mark point and a virtual camera which is synchronous with the real shooting camera in time-space and technical indexes;
the real shooting camera is provided with a camera space positioning device and a lens data acquisition device;
the lens data acquisition device comprises a gear set, a fixing frame, a connecting wire and an information processor;
the spatial positioning device comprises an optical positioning camera for collecting position data, an optical positioning switch, a motion capture server and the camera spatial positioning device positioned on the real shooting camera, wherein the collected data comprises the position and rotation data of the real shooting camera, the motion data of the motion capture actor and the position and rotation data of the physical prop;
transmitting the relative position data of the real shooting camera acquired by a gyroscope locator module in the camera space positioning device and the absolute position data received by the optical positioning switch to a data fusion switch for fusion to obtain fused data, reducing the picture jitter caused by vibration or shielding, transmitting the acquired absolute position data to the optical positioning switch by the optical positioning camera, wherein the absolute position data is obtained by acquiring an optical positioning point on the real shooting camera by the optical positioning camera;
the material synthesis device comprises a data fusion switch, an engine server and a DIT data server, wherein the DIT data server, a lens data acquisition device and the camera space positioning device are all connected with the data fusion switch, the optical positioning switch is connected with the data fusion switch through an action capture server, the engine server is connected with the data fusion switch, the real shooting camera is connected with the engine server, and the data fused by the data fusion switch and the video signal shot by the real shooting camera are simultaneously transmitted to the engine server;
the real shooting camera and the virtual camera are subjected to focal length matching in real time through a space positioning device, and the real shooting camera accesses a video signal to the engine server to realize that the video signal is projected to a virtual scene in a set space proportion;
the real shooting camera and the virtual camera focal length matching formula is as follows:
Fov＝aTan(36/f*2*k)*2，
fov is a virtual camera focal section, f is a real-shooting camera focal section, and k is a proportionality coefficient, so that when the real-shooting camera moves or the focal section changes, the focal section of the virtual camera changes, and accordingly, a virtual scene or a virtual-real synthetic scene displayed by the storage display device changes synchronously;
the spatial calculation formula of the real shooting camera projected to the virtual scene is as follows:
ScaleX＝Tan(Fov/2)*L*2；
ScaleY＝ScaleX/P；
wherein, scaleX is the proportion of the X direction, L is the distance between the virtual camera in the engine server and the imaging plane, scaleY is the proportion of the Y direction, and P is the resolution of the real shooting camera;
correcting the real shooting camera and the virtual camera, projecting an original point of space in a film field and a ground central point into a virtual scene, placing a correcting body attached with an optical mark point in the film field, acquiring absolute position data of a mass center of the real shooting camera and the correcting body, displaying a virtual image of the correcting body shot by the virtual camera by a background monitor, superposing the virtual image and a real-time image signal into a synthetic video, and observing the overlapping condition of the real-time image and the virtual image in the synthetic video by moving the real shooting camera until the real-time image and the virtual image in the synthetic video can be completely overlapped under any motion of the real shooting camera;
the storage display device comprises a hard disk recorder, a field monitor, a background monitor, an airborne monitor and a video turner, wherein the engine server transmits the superposed video data to the hard disk recorder, the field monitor, the background monitor and the airborne monitor are all connected with the hard disk recorder, and the video turner is arranged between the field monitor and the hard disk recorder;
time synchronizer, including synchronizing box, synchronous generator and time code generator, synchronous generator with time code generator all is connected with synchronizing box, optics location switch with synchronizing box is connected, and time code generator sends unified time code for the camera of clapping in fact the synchronizing box with the hard disk recorder, synchronous generator sends synchronizing signal for the camera of clapping in fact the synchronizing box engine server and the hard disk recorder carries out data synchronization.
2. The system of claim 1, wherein: the real shooting camera is at least provided with one, the storage display device is at least provided with one group, and the real shooting camera corresponds to one group of the storage display device.
3. The system of claim 1, wherein: the gear set on the lens transmits the focal length and the focal length data to the information processor through a connecting line, and the information processor transmits the focal length and the focal length data to the engine server through the data fusion switch.
4. The system of claim 1, wherein: and the engine server acquires the time codes of the space positioning device and the real shooting camera, performs comparison and correction, and refreshes the fused data into the position data of the space positioning device when the time codes are consistent, so as to realize data synchronization of the real shooting camera, the virtual camera, the field monitor, the background monitor and the airborne monitor.
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