CN112887514A - Real-time visualization method and system suitable for virtual shooting and production of film and television - Google Patents
Real-time visualization method and system suitable for virtual shooting and production of film and television Download PDFInfo
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- 238000005286 illumination Methods 0.000 claims description 47
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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
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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
- H04N5/222—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
- H04N5/2621—Cameras specially adapted for the electronic generation of special effects during image pickup, e.g. digital cameras, camcorders, video cameras having integrated special effects capability
Abstract
The invention discloses a real-time visualization method and a real-time visualization system suitable for movie and television virtual shooting and production, which relate to the field of photography and shooting and comprise the following steps: installing the LED ring screen in a studio according to a preset specification, and setting the refreshing frequency of the LED ring screen according to a preset frequency; capturing a background image of an LED ring screen background, a role target and a camera under coaxial motion through a photographing servo system, and acquiring a special photographing image of a special photographing target; acquiring an induction signal of a sensor, acquiring a contour space of a character target according to the induction signal, and moving a background sub-screen in an LED ring screen according to the contour space to acquire a motion image of the character target in the background sub-screen; and when the image is captured, the motion image, the background image and the feature image are fused by the photographing servo system to obtain an omnibearing real-time interactive image. The invention realizes the synchronous shooting of the visual special effect and the role target, leads the production of the visual special effect, and greatly reduces the cost and the period of post production.
Description
Technical Field
The invention relates to the field of photography and shooting, in particular to a real-time visualization method and a real-time visualization system suitable for virtual shooting and production of movies and televisions.
Background
The main scene and environment carrier for movie and television play shooting is a studio, and in the process of movie and television shooting, production and visual special effect technology development, a digital studio undergoes several technical changes: the first generation digital studio uses green or blue color filter coating background, manually records the position relation between the role and the camera, the illumination intensity, the angle and the like during shooting, tracks the recorded data during post-production, and realizes visual special effect synthesis and high-resolution rendering with the scene, object and role which are actually shot or produced by a computer. The second generation digital studio adopts green or blue color filter coating background, or has a part of large-sized LED screen for far and middle scenes, still needs to manually record the position relation between the role and the camera, the illumination intensity, the angle and the like during shooting, carries out primary synthesis on a site and a visual digital scene manufactured in advance on a computer and a data server, and completes optimized visual special effect synthesis and high-resolution rendering by utilizing the fragments of the site synthesis and rendering during later manufacturing.
Although the second generation digital studio is added with a large-scale LED screen compared with the first generation digital studio, and realizes primary synthesis on a shooting site, and the result of special effect production and synthesis is relatively controlled, the two generations of digital studios need to manually record a large amount of data of the position relation, the illumination intensity, the angle and the like between a shooting role and a camera, the link is limited by the limitation of manual recording, one step is that various conditions and relative relations cannot be exhausted, the second step is that a large amount of errors and unpredictable errors are often introduced due to personal factors of operators in the manual link, and the actual result after later-stage special effect production and rendering is often difficult to completely meet expectations. Meanwhile, due to the fact that actors perform high-difficulty action and detail processing of body language in the later stage, the roles often need to have local green sub-screens so as to filter out outline space, and the existing green sub-screens are usually fixed at one position of the screen and cannot move along with the movement of role targets in relatively fixed scene shooting. Meanwhile, the existing special shooting targets are often added in the post-processing, so that the roles and the props of the real actors cannot be in the same scene in the shooting process, and the actors do not have reference objects and interactive objects in the shooting process and can perform performance and form creation only by means of personal imagination.
Disclosure of Invention
In order to solve the problems, the invention provides a real-time visualization method suitable for virtual shooting and production of movies and televisions, which takes an LED ring screen as a background screen and comprises the following steps:
installing the LED ring screen in a studio according to a preset specification, and setting the refreshing frequency of the LED ring screen according to a preset frequency;
capturing a background image of an LED ring screen background, a role target and a camera under coaxial motion through a photographing servo system, and acquiring a special photographing image of a special photographing target;
acquiring an induction signal of a sensor, acquiring a contour space of a character target according to the induction signal, and moving a background sub-screen in an LED ring screen according to the contour space to acquire a motion image of the character target in the background sub-screen;
when the image is captured, the motion image, the background image and the feature image are fused through the shooting servo system, and an omnibearing real-time interactive image is obtained.
Further, the design criteria of the preset amount are to satisfy the depth of field relationship among the camera, the special shooting target and the LED ring screen.
Further, the studio also comprises an illumination device for providing illumination for a specific shooting target, and the image capturing method of the shooting servo system comprises the following steps:
and adjusting the illumination intensity and the illumination angle of the illumination equipment according to the real-time data of the relative positions and angles among the targets, the LED ring screen, the camera and the illumination equipment in the studio, so that the illumination of the role target and the special shooting target meets the shooting requirement.
Further, a background secondary screen is further included between the special shot target and the LED ring screen and used for obtaining the contour space of the special shot target.
Further, the background sub-screen and the background sub-screen respectively follow the contour space motion of the character target and the special shooting target according to the perspective relation.
The invention also provides a real-time visualization system suitable for virtual shooting and production of movies and televisions, which takes an LED ring screen as a background screen and comprises the following components:
the LED ring screen is arranged on the studio in a preset amount, and is used for setting a refreshing frequency according to a preset frequency and providing a shooting background;
the shooting servo system is used for capturing background images of the LED ring screen background, the character target and the camera under coaxial motion and acquiring a special shooting image of the special shooting target;
the photographing servo system is also used for acquiring a sensing signal of the sensor, acquiring a contour space of the character target according to the sensing signal, and moving a background sub-screen in the LED ring screen according to the contour space to acquire a motion image of the character target in the background sub-screen;
the shooting servo system is also used for fusing the motion image, the background image and the object image to obtain an omnibearing real-time interactive image while capturing the image.
Further, the design criteria of the preset amount are to satisfy the depth of field relationship among the camera, the special shooting target and the LED ring screen.
Further, the system also comprises an illumination device used for providing illumination for a special shooting target, and the image capturing method of the photography servo system is as follows:
and adjusting the illumination intensity and the illumination angle of the illumination equipment according to the real-time data of the relative positions and angles among the targets, the LED ring screen, the camera and the illumination equipment in the studio, so that the illumination of the role target and the special shooting target meets the shooting requirement.
Further, a background secondary screen is further included between the special shot target and the LED ring screen and used for obtaining the contour space of the special shot target.
Further, the background sub-screen and the background sub-screen respectively follow the contour space motion of the character target and the special shooting target according to the perspective relation.
Compared with the prior art, the invention at least has the following beneficial effects:
(1) the invention relates to a real-time visualization method and a real-time visualization system suitable for virtual shooting and production of movies and televisions, which are characterized in that through a shooting servo system, relative position and angle data between each shooting component and lighting equipment in shooting are stored and calculated in real time, so that real-time adjustment is carried out, the problems that a visual special effect production object and a scene cannot be predicted in the later period in the traditional movie and television production process, and actors can perform and interact only by imagination are solved, and the performance and the reaction of the actors in the shooting process are more real;
(2) by synchronously shooting the visual special effect (special shooting target) and the role target, the visual special effect work which is a lot of costly and time-consuming in the traditional movie and television play production is 'preposed', and the cost and the production period of post production are greatly reduced;
(3) meanwhile, the visual production result of the movie and television play works is visible in real time, real-time controllability of the shooting result can be realized through real-time feedback and control of a visual special effect algorithm based on a virtual reality-real-time visual camera servo system, and the condition that shooting materials in traditional movie and television play creation do not meet special effect production requirements and need to be reworked for shooting is avoided;
(4) through setting up LED ring screen with predetermineeing the specification to set up its frequency of refreshing with predetermineeing the frequency, solved the LED illumination not enough problem that large-scale digital studio can appear, do not influence illumination intensity and shooting quality when improving digital studio size.
Drawings
FIG. 1 is a diagram of method steps for a real-time visualization method suitable for virtual film shooting and production;
FIG. 2 is a system block diagram of a real-time visualization system suitable for virtual film shooting and production;
FIG. 3 is a schematic diagram of the components of the studio;
description of reference numerals: the system comprises a 1-LED ring screen, a 2-role target, a 3-camera, a 4-special shooting target, a 5-background sub-screen, a 6-lighting device, a 7-background sub-screen and an 8-LED auxiliary screen.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
Example one
A digital studio based on Virtual Reality-real-time Visualization (VR-RV) technology is characterized in that Virtual Reality (VR) pre-shooting or computer-made immersive panorama is displayed on a huge LED circular screen, a large number of sensors are used for recording information such as relative positions, illumination angles and strengths of roles and cameras during shooting, and most of optimized visual special effect synthesis and high-resolution rendering of scenes, objects and roles which are shot or made by a computer can be completed on site of the studio in real time. And tracking the recorded data during post-production, and secondarily realizing the production, synthesis and rendering of the depth and refined visual special effects. The development goal of the VR-RV digital studio is to lead the visual special effect flow to the shooting stage as far as possible, to realize the shooting of the interactive virtual reality scene and the properties and the real role in the shooting scene in one step, and to realize the real-time regulation and control of the shooting result. In order to achieve the effect of real-time synchronous shooting, as shown in fig. 1 and 3, the invention provides a real-time visualization method suitable for virtual shooting and production of movies, which takes an LED ring screen 1 as a background screen and comprises the following steps:
installing the LED ring screen 1 in a studio according to a preset specification, and setting the refreshing frequency of the LED ring screen 1 according to a preset frequency;
capturing a background image under the coaxial motion of an LED (light emitting diode) ring screen background, a role target 2 and a camera 3 through a shooting servo system, and acquiring a special shooting image of a special shooting target 4;
acquiring an induction signal of a sensor, acquiring a contour space of the character target 2 according to the induction signal, moving a background sub-screen 5 in an LED (light-emitting diode) ring screen according to the contour space, and acquiring an action image of the character target 2 in the background sub-screen 5;
when the image is captured, the motion image, the background image and the feature image are fused through the shooting servo system, and an omnibearing real-time interactive image is obtained.
The LED circular screen can provide a visual background in the shooting process, and the position relation between the role target and the special shooting target can be interchanged according to the shooting requirement, so that the role target is not limited to be the role target in front of the background sub-screen.
In this digital studio, adopted immersive LED ring screen, made its specification that is used for VR-RV reach 23 meters diameter, 270 degrees ring screens (surplus 90 degrees assist with LED and assist screen 8, realize 360 degrees panorama encirclement), height 5 meters, width 50 prolong meters, through the diameter that enlarges LED ring screen to satisfy the depth of field demand when specially taking photograph the target and shoot. Meanwhile, the LED ring screen also comprises a high-speed parallel interface of a full set of real-time photographing servo system. The LED ring screen is arranged in the digital studio according to the preset specification, so that the LED ring screen is compatible with a standard format (the width-to-height ratio of the screen is 1.9, and the vertical viewing angle of the rear row is 25 degrees) reflected by IMAX, and an unprecedented field shortcut is provided for panoramic shooting of IMAX films.
By the maximization of the expanded background screen specification, a sufficient background foundation is provided for the role target, so that the role target can be always in the surrounding of the background in the process of acquiring the action image, and the invention also comprises the step of acquiring the action image and simultaneously providing the background foundation for the role target
The middle scene and the virtual prop of the photochromic effect are synchronously realized:
in the prior art, since it is considered that if a large amount of LED ring screens are used as the background screen, the brightness may be insufficient in the shooting of the dynamic range, and the resolution is not sufficient, the spliced laser projection ring screens are generally used in the prior art to ensure the brightness. In the invention, by adjusting the refreshing frequency and the resolution ratio of the LED ring screen, under the condition of increasing the screen size, the cost of facility construction is reduced on the contrary because the LED ring screen is adopted. Meanwhile, due to the problem that the light emitting colors of the LEDs at different angles are biased, the color temperature of the surface of a close shot or a manual set shot/prop cannot be connected with a long shot-medium shot, and a lot of manpower and material resources are repeated and wasted (the angle of a camera set needs to be adjusted according to the biased light emitting colors) in field shooting. After the field diameter is increased (the field diameter is enlarged to 150% on the basis of the existing digital studio), the virtual medium scenery and props (namely various special shooting targets) can be connected with the close scenery where the character targets are located.
Synchronous implementation of background rendering:
the rendering of the background is also an extremely important link in the movie and television production process, and when the role target action image is acquired and the background is rendered, the real-time acquisition of the role outline space is required, and when the background is further rendered, the action image is combined with the background after being subjected to corresponding visual processing according to the outline space. Therefore, in the invention, the green (or blue) background sub-screen is arranged in the LED ring screen, the sensors are arranged on the character target and the special shooting target, and the shooting servo system can obtain the outline space of the shooting target according to the sensing signals of the sensors, so that the background sub-screen can be controlled to move along with the movement of the character target in real time (namely the coaxial movement of the screen sub-screen, the character target and the camera), and the real-time linkage shooting of the shooting target and the background in the LED ring screen is realized. The method solves the problem that in the prior art, the role target is limited to be limited in a green background in the shooting process (in the prior art, a green or blue background is arranged in the background to obtain the outline space of the role target), and the role is limited to be played.
Meanwhile, as shown in fig. 3, the photographing servo system also controls the illumination so as to realize coaxial motion between the photographing target (including the character target 2 and the special photographing target 4), the lighting device 6 (also including the local lighting device), and the camera 3. The concrete mode is as follows: the real-time data of the relative positions and angles among the targets, the LED ring screen 1, the camera 3 and the lighting equipment 6 in the studio are obtained, and the illumination intensity and the illumination angle of the lighting equipment 6 are adjusted according to the real-time data so that the illumination of the character target 2 and the special shooting target 4 meets the shooting requirement.
Meanwhile, in order to filter out the outline space of the special shooting target, a background secondary screen 7 is arranged between the LED circular screen 1 and the special shooting target 4. The background sub-screen 5 and the background sub-screen 7 respectively follow the contour space motion of the character target 2 and the special shooting target 4 according to the perspective relation.
Through the arrangement, the action image, the special shooting image and the background image can be synchronously shot, the problems that in the traditional movie and television play shooting process, a visual special effect making object and a scene at the later stage cannot be predicted, and actors can complete performance and interaction only by imagination are solved, so that the performance and the response of the actors are more real in the shooting process. By synchronously shooting the visual special effect (special shooting target) and the role target, the visual special effect work which is a lot of costly and time-consuming process in the traditional movie and television play production is 'preposed', and the cost and the production period of the post production are greatly reduced. Meanwhile, the visual production result of the movie and television play works is visible in real time, real-time controllability of the shooting result is realized through real-time feedback and control of a visual special effect algorithm based on a virtual reality-real-time visual shooting servo system, and the condition that shooting materials in traditional movie and television play creation do not meet special effect production requirements and need to be reworked for shooting is avoided.
Example two
In order to better understand the inventive idea of the present invention, the present embodiment describes the present invention in the form of a system structure, as shown in fig. 2, a real-time visualization system suitable for virtual shooting and production of movies and televisions, which uses an LED ring screen as a background screen, and includes:
the LED ring screen is arranged on the studio in a preset amount, and is used for setting a refreshing frequency according to a preset frequency and providing a shooting background;
the shooting servo system is used for capturing background images of the LED ring screen background, the character target and the camera under coaxial motion and acquiring a special shooting image of the special shooting target;
the photographing servo system is also used for acquiring a sensing signal of the sensor, acquiring a contour space of the character target according to the sensing signal, and moving a background sub-screen in the LED ring screen according to the contour space to acquire a motion image of the character target in the background sub-screen;
the shooting servo system is also used for fusing the motion image, the background image and the object image to obtain an omnibearing real-time interactive image while capturing the image.
Further, the design criteria of the preset amount are to satisfy the depth of field relationship among the camera, the special shooting target and the LED ring screen.
Further, the system also comprises an illumination device used for providing illumination for a special shooting target, and the image capturing method of the photography servo system is as follows:
and adjusting the illumination intensity and the illumination angle of the illumination equipment according to the real-time data of the relative positions and angles among the targets, the LED ring screen, the camera and the illumination equipment in the studio, so that the illumination of the role target and the special shooting target meets the shooting requirement.
Further, a background secondary screen is further included between the special shot target and the LED ring screen and used for obtaining the contour space of the special shot target.
Further, the background sub-screen and the background sub-screen respectively follow the contour space motion of the character target and the special shooting target according to the perspective relation.
In summary, the real-time visualization method and system suitable for virtual movie shooting and production, provided by the invention, can be used for real-time adjustment through the shooting servo system and real-time storage and calculation of relative position and angle data between each shooting component and the lighting equipment in shooting, so that the problems that visual special effect production objects and scenes cannot be predicted in the later period in the traditional movie shooting process, and actors can perform and interact only by imagination are solved, and the performances and reactions of actors in the shooting process are more real.
By synchronously shooting the visual special effect (special shooting target) and the role target, the visual special effect work which is a lot of costly and time-consuming process in the traditional movie and television play production is 'preposed', and the cost and the production period of the post production are greatly reduced. Meanwhile, the visual production result of the movie and television play works is visible in real time, real-time controllability of the shooting result can be realized through real-time feedback and control of a visual special effect algorithm based on a virtual reality-real-time visual camera servo system, and the condition that shooting materials in traditional movie and television play creation do not meet special effect production requirements and need to be reworked for shooting is avoided;
through setting up LED ring screen with predetermineeing the specification to set up its frequency of refreshing with predetermineeing the frequency, solved the LED illumination not enough problem that large-scale digital studio can appear, do not influence illumination intensity and shooting quality when improving digital studio size.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (10)
1. A real-time visualization method suitable for virtual shooting and production of movies and televisions is characterized in that an LED ring screen is used as a background screen, and the method comprises the following steps:
installing the LED ring screen in a studio according to a preset specification, and setting the refreshing frequency of the LED ring screen according to a preset frequency;
capturing a background image of an LED ring screen background, a role target and a camera under coaxial motion through a photographing servo system, and acquiring a special photographing image of a special photographing target;
acquiring an induction signal of a sensor, acquiring a contour space of a character target according to the induction signal, and moving a background sub-screen in an LED ring screen according to the contour space to acquire a motion image of the character target in the background sub-screen;
when the image is captured, the motion image, the background image and the feature image are fused through the shooting servo system, and an omnibearing real-time interactive image is obtained.
2. The method as claimed in claim 1, wherein the predetermined amount of design criteria is to satisfy a depth of field relationship between the camera, the special object and the LED ring screen.
3. The method as claimed in claim 1, wherein the studio further comprises an illumination device for providing illumination to the specific object, and the image capturing method of the photography servo system comprises:
and adjusting the illumination intensity and the illumination angle of the illumination equipment according to the real-time data of the relative positions and angles among the targets, the LED ring screen, the camera and the illumination equipment in the studio, so that the illumination of the role target and the special shooting target meets the shooting requirement.
4. The method as claimed in claim 1, wherein a background sub-screen is further included between the special object and the LED ring screen for obtaining a contour space of the special object.
5. The method as claimed in claim 4, wherein the background sub-screen and the background sub-screen follow the contour space motion of the character target and the feature target respectively according to perspective relation.
6. The utility model provides a real-time visual system suitable for virtual shooting of movie & TV and preparation which characterized in that regards as the background screen with LED ring screen, includes:
the LED ring screen is arranged on the studio in a preset amount, and is used for setting a refreshing frequency according to a preset frequency and providing a shooting background;
the shooting servo system is used for capturing background images of the LED ring screen background, the character target and the camera under coaxial motion and acquiring a special shooting image of the special shooting target;
the photographing servo system is also used for acquiring a sensing signal of the sensor, acquiring a contour space of the character target according to the sensing signal, and moving a background sub-screen in the LED ring screen according to the contour space to acquire a motion image of the character target in the background sub-screen;
the shooting servo system is also used for fusing the motion image, the background image and the object image to obtain an omnibearing real-time interactive image while capturing the image.
7. The real-time visualization system for virtual movie shooting and production as claimed in claim 6, wherein the design criteria of the preset amount is to satisfy the depth of field relationship between the camera, the special shot object and the LED ring screen.
8. The real-time visualization system for virtual movie shooting and production as claimed in claim 6, further comprising an illumination device for providing illumination to the special shooting target, wherein the image capturing method of the photography servo system is:
and adjusting the illumination intensity and the illumination angle of the illumination equipment according to the real-time data of the relative positions and angles among the targets, the LED ring screen, the camera and the illumination equipment in the studio, so that the illumination of the role target and the special shooting target meets the shooting requirement.
9. The real-time visualization system for the virtual shooting and production of movies of claim 6, further comprising a background sub-screen between the special object and the LED ring screen for obtaining the contour space of the special object.
10. The system as claimed in claim 9, wherein the background sub-screen and the background sub-screen follow the contour space of the character object and the feature object respectively according to perspective relationship.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113923377A (en) * | 2021-10-11 | 2022-01-11 | 浙江博采传媒有限公司 | Virtual film-making system of LED (light emitting diode) circular screen |
| CN114840124A (en) * | 2022-03-30 | 2022-08-02 | 阿里巴巴（中国）有限公司 | Display control method, display control apparatus, electronic device, display control medium, and program product |
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2020
- 2020-12-30 CN CN202011621660.3A patent/CN112887514A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113923377A (en) * | 2021-10-11 | 2022-01-11 | 浙江博采传媒有限公司 | Virtual film-making system of LED (light emitting diode) circular screen |
| CN114840124A (en) * | 2022-03-30 | 2022-08-02 | 阿里巴巴（中国）有限公司 | Display control method, display control apparatus, electronic device, display control medium, and program product |
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