CN113691746B - LED background and green curtain shooting synthesis method and system - Google Patents

LED background and green curtain shooting synthesis method and system Download PDF

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Publication number
CN113691746B
CN113691746B CN202110984543.1A CN202110984543A CN113691746B CN 113691746 B CN113691746 B CN 113691746B CN 202110984543 A CN202110984543 A CN 202110984543A CN 113691746 B CN113691746 B CN 113691746B
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frame
curtain
film
pictures
shooting
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CN113691746A (en
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李龙威
曹正之
黄康宁
杨俊超
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Surreal Film Production Shanghai Co ltd
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Surreal Film Production Shanghai Co ltd
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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
    • H04N5/272—Means for inserting a foreground image in a background image, i.e. inlay, outlay
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B15/00—Special procedures for taking photographs; Apparatus therefor
    • G03B15/08—Trick photography
    • G03B15/10—Trick photography using back-projection, i.e. blending artificial background with real foreground
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Studio Circuits (AREA)
  • Studio Devices (AREA)

Abstract

The application relates to a method and a system for synthesizing LED background and green curtain shooting, which belong to the technical field of film and television work processing and comprise the following steps: building an LED large screen; setting a frame rate of curtain shooting, and adjusting the frame rate of the LED large screen to be x times of the frame rate of the curtain shooting; controlling the shooting frame rate of the camera to be the same as the frame rate of the LED large screen; shooting a film with alternately appearing curtain backgrounds and LED backgrounds; the invention has the advantages of simultaneously having a curtain and an LED background and avoiding the defects of the curtain and the LED background.

Description

LED background and green curtain shooting synthesis method and system
Technical Field
The invention relates to the technical field of film and television work processing, in particular to a method and a system for shooting and synthesizing an LED background and a green curtain.
Background
At present, background synthesis technology is needed in the shooting process of a plurality of film and television works, the background used in the background synthesis technology is not only the traditional curtain, but also an LED background, and compared with the traditional curtain, the LED background has higher frame number and is easier to carry out color mixing treatment. However, the screen is finer than the LED background, and the LED background is also prone to moire, which affects the synthesized image effect. Backdrop typically includes a blue screen and a green screen, with asia typically using the blue screen and europe typically using the green screen.
The prior art solutions described above have the following drawbacks: the curtain and the LED background have advantages and disadvantages in the background synthesis technology, and a method capable of simultaneously having the advantages of the curtain and the LED background and avoiding the disadvantages is needed.
Disclosure of Invention
On the other hand, in order to achieve the advantages of both the curtain and the LED background and avoid the drawbacks, the present application provides a method for synthesizing an LED background and a green curtain image.
The LED background and green curtain shooting synthesis method provided by the application adopts the following technical scheme:
a method for synthesizing LED background and green curtain shooting comprises the following steps:
building an LED large screen;
setting a frame rate of curtain shooting, and adjusting the frame rate of the LED large screen to be x times of the frame rate of the curtain shooting;
controlling the shooting frame rate of the camera to be the same as the frame rate of the LED large screen;
shooting a film with alternately appearing curtain backgrounds and LED backgrounds;
and processing the shot film background.
Through adopting above-mentioned scheme, can have the advantage of curtain and LED background both simultaneously, bring a lot of facility for post-treatment, alignment picture that can relax. The process of post-processing is accelerated, so that the color mixing is facilitated, for example, the process of reverse green is realized, and the correct picture color tone and the background light effect can be obtained through the LED background picture easily. The defects of LED background shooting, such as moire, insufficient picture fineness and the like, can be overcome through the traditional flow of the green curtain.
Preferably, shooting a movie in which a curtain background and an LED background alternately appear includes:
dividing the playing content of the LED large screen according to the current frame rate of the LED large screen, wherein each frame of playing content is used as a single frame picture;
dividing the number of single-frame pictures of the played content by x to obtain a curtain replacement frame number;
replacing a single frame picture which is equal to the frame number of the curtain replacement frame in the single frame pictures of the played content with a curtain picture, wherein the single frame pictures of adjacent frames of the curtain picture are all original pictures;
and playing the processed picture on the LED large screen, and shooting a film.
By adopting the scheme, the large LED screen processes the played content before playing, so that the played picture itself is inserted with the pure-color curtain background, and the camera can directly perform post-processing after shooting.
Preferably, shooting a movie in which a curtain background and an LED background alternately appear includes:
after shooting a film, performing pre-processing on the film, dividing the film according to the current frame rate, and taking each frame of film as a single frame of picture;
dividing the number of single-frame pictures of the film by x to obtain the number of curtain replacement frames;
and replacing the single-frame picture which is equal to the frame number of the curtain replacement frame in the single-frame picture of the film with the curtain picture, wherein the single-frame pictures of the adjacent frames of the curtain picture are all original pictures.
By adopting the scheme, the film is directly inserted with the pure-color curtain background in the film after shooting, and the film can be played after post-processing. The processed curtain background of the film under the condition of high frame number can not influence the playing effect, and the post-processing is easier.
Preferably, the number of the original pictures between adjacent curtain pictures is the number of the gap pictures, the number of the gap pictures is calculated, and the number of the gap pictures is x-1;
recording the sequence of a curtain picture and an original picture in the replaced play picture to form a picture frame number distribution map;
after shooting the film, each frame of the film is checked according to the frame number distribution map of the film, and the curtain background and the LED background are respectively processed according to the frame number distribution map of the film.
Through adopting above-mentioned scheme, the curtain picture evenly distributed in the broadcast picture, picture frame number distribution map can help the staff to proofread whether the image after the automated processing goes wrong, can also help the staff to handle curtain and LED background.
Preferably, the number of the original pictures between adjacent curtain pictures is the number of the gap pictures, the number of the gap pictures is calculated, and the number of the gap pictures is x-1;
recording the sequence of a curtain picture and an original picture in the replaced film picture to form a film frame number distribution map;
selecting all the curtain pictures in the film according to the film frame number distribution map, and processing the curtain pictures after confirming that the curtain pictures are normal;
and processing the original picture in the film according to the film frame number distribution diagram.
Through adopting above-mentioned scheme, the curtain picture evenly distributed in the film, less to play effect influence, film frame number distribution diagram can help the staff to proofread whether the film after the automated processing goes wrong, can also help the staff to handle curtain and LED background.
Preferably, before a single frame picture equal to the number of screen replacement frames in single frame pictures of the play contents is replaced by a screen picture, the play contents of the LED large screen are checked, the picture with the most monotonous set frame number in the play contents is selected, and the initial frame for inserting the screen picture is selected according to the selected play picture distribution.
By adopting the scheme, the position most suitable for inserting the initial frame of the curtain picture is found out by automatically detecting the picture color, so that the play content is as natural as possible.
Preferably, before a single frame picture equal to the number of screen replacement frames in a single frame picture of a film is replaced with a screen picture, the film content is checked, a picture with the set number of frames and the most monotonous picture color in the film content is selected, and a start frame for inserting the screen picture is selected according to the selected play picture distribution.
By adopting the scheme, the position most suitable for inserting the initial frame of the curtain picture is found out through automatically detecting the picture color, so that the played movie is smoother, and the viewing experience is improved.
On the other hand, in order to be able to have the advantages of both the curtain and the LED background and to be able to avoid the drawbacks, the present application provides an LED background and green curtain shooting combining system.
The application provides a LED background and green curtain shooting synthesis system adopts following technical scheme:
the LED background and green curtain shooting synthesis system comprises an LED large screen, shooting equipment and a control system, wherein the control system comprises a frame rate control module, a shooting synchronization module, a film shooting module and a post-processing module;
the frame rate control module receives the input curtain frame rate, and adjusts the play frame rate of the LED large screen to be x times of the curtain frame rate;
the shooting synchronization module invokes the playing frame rate of the frame rate control module to synchronize the shooting frame rate of the shooting equipment with the playing frame rate;
the film shooting module calls the playing frequency of the shooting synchronization module, and shoots films with alternately appearing curtain backgrounds and LED backgrounds according to the playing frequency;
and the post-processing module performs post-processing on the film which is received and shot.
Through adopting above-mentioned scheme, can have the advantage of curtain and LED background both simultaneously, bring a lot of facility for post-treatment, alignment picture that can relax. The process of post-processing is accelerated, so that the color mixing is facilitated, for example, the process of reverse green is realized, and the correct picture color tone and the background light effect can be obtained through the LED background picture easily. The defects of LED background shooting, such as moire, insufficient picture fineness and the like, can be overcome through the traditional flow of the green curtain.
Preferably, the film shooting module comprises a picture dividing unit and a content replacing unit;
the picture dividing unit calls the playing content of the LED large screen and the playing frequency of the frame rate control module, and the picture dividing module divides the playing content into single-frame pictures with the number equal to that of the playing frequency;
the content replacement unit divides the number of single-frame pictures by x to obtain a curtain replacement frame number, the content replacement module replaces single-frame pictures which are equal to the curtain replacement frame number in the playing content with curtain pictures, the single-frame pictures of adjacent frames of the curtain pictures are original pictures, the content replacement module transmits the processed playing content to the LED large screen for playing, and the shooting equipment shoots a film and then transmits the film to the post-processing module.
By adopting the scheme, the large LED screen processes the played content before playing, so that the played picture itself is inserted with the pure-color curtain background, and the camera can directly perform post-processing after shooting.
Preferably, the film shooting module comprises a film dividing unit and a film replacing unit;
the film dividing unit calls the playing frame rate of the film and the frame rate control module shot by the shooting equipment, and divides the film into single-frame pictures with the number equal to the playing frequency;
the film replacement unit divides the number of single-frame pictures by x to obtain a curtain replacement frame number, the film replacement unit replaces single-frame pictures which are equal to the curtain replacement frame number in the film with the curtain pictures, the single-frame pictures of adjacent frames of the curtain pictures are original pictures, and the film replacement module transmits the processed play content to the post-processing module.
By adopting the scheme, the film is directly inserted with the pure-color curtain background in the film after shooting, and the film can be played after post-processing. The processed curtain background of the film under the condition of high frame number can not influence the playing effect, and the post-processing is easier.
In summary, the invention has the following beneficial effects:
1. the LED screen has the advantages of being capable of simultaneously having both a curtain and an LED background, brings much convenience for post-processing, can easily align pictures, accelerates the post-processing progress, and can easily obtain correct picture color tone and backlight effect through the LED background picture.
2. Many of the disadvantages of LED background photography can be addressed by the traditional flow of green curtains.
Drawings
FIG. 1 is an overall system block diagram of an embodiment one of an LED background and green curtain photography combining system according to the present embodiments;
FIG. 2 is a block diagram of the overall module of an embodiment one of the LED background and green curtain photography combining system of the present embodiments;
FIG. 3 is a block diagram of a film shooting module of an embodiment of a combined LED background and green curtain shooting system according to the present application;
fig. 4 is a block diagram of a second film shooting module of an embodiment of a LED background and green curtain shooting composite system according to the present application.
In the figure, 1, an LED large screen; 2. a photographing device; 3. a control system; 31. a frame rate control module; 32. a shooting synchronization module; 33. a film shooting module; 34. a post-processing module; 341. a picture dividing unit; 342. a content replacement unit; 343. a pattern creating unit; 344. an automatic frame selecting unit; 345. a film dividing unit; 346. a film replacement unit; 347. a graphic creation unit; 348. and an automatic frame inserting unit.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-4.
The embodiment of the application discloses a method for synthesizing LED background and green curtain shooting, which comprises the following specific steps:
and constructing an LED large screen 1, and transmitting an LED background to be played to the LED large screen 1 according to film requirements.
The curtain shooting frame rate is set (the curtain shooting frame rate is set to 24 in this embodiment), and the frame rate of the LED large screen 1 is adjusted to x times the curtain shooting frame rate (x is 2 in this embodiment).
And controlling the shooting frame rate of the camera to be the same as that of the LED large screen 1, and realizing the shooting frame rate of the camera and the LED large screen 1 through GENLOCK.
Shooting films with alternately appearing curtain backgrounds and LED backgrounds. Dividing the playing content of the LED large screen 1 according to the current frame rate of the LED large screen 1, wherein each frame of playing content is used as a single frame picture. Dividing the number of single frame pictures of the played content by 2 to obtain the number of curtain replacement frames, wherein the number of curtain replacement frames is 24. And replacing the single-frame picture which is equal to the frame number of the curtain replacement frame in the single-frame picture of the played content with the curtain picture, wherein the single-frame pictures of the adjacent frames of the curtain picture are all original pictures. The number of the original pictures between the adjacent curtain pictures is the number of the gap pictures, the number of the gap pictures is calculated, and the number of the gap pictures is x-1, namely 24. And checking the play content of the LED large screen 1, selecting the picture with the monotonous picture color of the set frame number in the play content, and selecting the initial frame for inserting the curtain picture according to the selected play picture distribution. The insertion format adopts a format in which adjacent frames are uncorrelated.
And recording the sequence of the curtain picture and the original picture in the replaced play picture to form a picture frame number distribution map. After shooting the film, each frame of the film is checked according to the frame number distribution map of the film, and the curtain background and the LED background are respectively processed according to the frame number distribution map of the film. The curtain pictures are uniformly distributed in the playing pictures, and the picture frame number distribution map can help workers to check whether the automatically processed images are problematic or not, and can also help the workers to process the curtain and the LED background.
The LED large screen 1 plays the processed picture and shoots the film.
And processing the shot film background, and playing the film after finishing the background processing.
The implementation principle of the LED background and green curtain shooting synthesis method in the embodiment of the application is as follows: the screen and LED background display device has the advantages of both the screen and the LED background, brings much convenience to post-processing, and can easily align pictures. The process of post-processing is accelerated, so that the color mixing is facilitated, for example, the process of reverse green is realized, and the correct picture color tone and the background light effect can be obtained through the LED background picture easily. The defects of LED background shooting, such as moire, insufficient picture fineness and the like, can be overcome through the traditional flow of the green curtain.
The second embodiment of the application discloses a method for combining LED background and green curtain shooting, which is different from the first embodiment in that when shooting a film in which the curtain background and the LED background alternately appear. And after shooting the film, performing pre-processing on the film, dividing the film according to the current frame rate, and taking each frame of film as a single frame of picture. Dividing the number of single-frame pictures of the film by x to obtain the curtain replacement frame number. And replacing the single frame picture which is equal to the frame number of the curtain replacement frame in the single frame picture of the film with the curtain picture. The single frame pictures of adjacent frames of the curtain picture are all original pictures. The number of the original pictures between the adjacent curtain pictures is the number of the gap pictures, the number of the gap pictures is calculated, and the number of the gap pictures is x-1, namely 24. And checking the play content of the LED large screen 1, selecting the picture with the monotonous picture color of the set frame number in the play content, and selecting the initial frame for inserting the curtain picture according to the selected play picture distribution. The insertion format adopts a format in which adjacent frames are uncorrelated.
And recording the sequence of the curtain picture and the original picture in the replaced film picture to form a film frame number distribution map. And selecting all the curtain pictures in the film according to the film frame number distribution map, and processing the curtain pictures after confirming that the curtain pictures are normal. And processing the original picture in the film according to the film frame number distribution diagram. The curtain pictures are evenly distributed in the film, the influence on the playing effect is smaller, the film frame number distribution diagram can help staff to check whether the automatically processed film has a problem or not, and can also help staff to process the curtain and the LED background.
The embodiment of the application discloses an LED background and green curtain shooting synthesis system, which comprises an LED large screen 1, shooting equipment 2 and a control system 3 as shown in fig. 1 and 2. The control system 3 includes a frame rate control module 31, a shot synchronization module 32, a film shooting module 33, and a post-processing module 34.
As shown in fig. 2, the frame rate control module 31 receives an input curtain frame rate, and the frame rate control module 31 adjusts the play frame rate of the LED large screen 1 to be x times the curtain frame rate.
As shown in fig. 2, the photographing synchronization module 32 invokes the play frame rate of the frame rate control module 31 to synchronize the photographing frame rate of the photographing apparatus 2 with the play frame rate.
As shown in fig. 2 and 3, the film shooting module 33 invokes the play frequency of the shooting synchronization module 32, and shoots the film with the curtain background alternating with the LED background according to the play frequency. The film shooting module 33 includes a picture dividing unit 341, a content replacing unit 342, a graphic establishing unit 343, and an automatic frame selecting unit 344.
As shown in fig. 3, the picture dividing unit 341 invokes the play content of the LED large screen 1 and the play frequency of the frame rate control module 31, and the picture dividing module divides the play content into single-frame pictures equal to the number of play frequencies.
As shown in fig. 3, the content replacing unit 342 divides the number of single frame pictures by x to obtain a curtain replacing frame number, the content replacing module replaces the single frame pictures equal to the curtain replacing frame number in the playing content with the curtain pictures, the single frame pictures of the adjacent frames of the curtain pictures are all original pictures, the content replacing module transmits the processed playing content to the LED large screen 1 for playing, and the shooting device 2 shoots a film and then transmits the film to the post-processing module 34.
As shown in fig. 3, the automatic frame selection unit 344 examines the play contents of the LED large screen 1 and selects the frame number of the set frame number picture with the monotonous picture color in the play contents, and selects the start frame for the curtain picture insertion according to the selected play picture distribution.
As shown in fig. 3, the graphic creation unit 343 records the order of the screen picture and the original picture in the replaced play picture to form a picture frame number distribution map. After capturing the film, the post-processing module 34 collates each frame of the film according to the frame number distribution map, and processes the curtain background and the LED background according to the frame number distribution map.
As shown in fig. 2, the post-processing module 34 performs post-processing on the film for which the reception of the shooting is completed.
The implementation principle of the LED background and green curtain shooting synthesis system in the embodiment of the application is as follows: the screen and LED background display device has the advantages of both the screen and the LED background, brings much convenience to post-processing, and can easily align pictures. The process of post-processing is accelerated, so that the color mixing is facilitated, for example, the process of reverse green is realized, and the correct picture color tone and the background light effect can be obtained through the LED background picture easily. The defects of LED background shooting, such as moire, insufficient picture fineness and the like, can be overcome through the traditional flow of the green curtain.
The curtain pictures are uniformly distributed in the playing pictures, and the picture frame number distribution map can help workers to check whether the automatically processed images are problematic or not, and can also help the workers to process the curtain and the LED background.
The second embodiment of the present application discloses an LED background and green curtain shooting combining system, as shown in fig. 4, which is different from the first embodiment in that the film shooting module 33 includes a film dividing unit 345, a film replacing unit 346, a graphic creating unit 347 and an automatic frame inserting unit 348.
As shown in fig. 4, the movie dividing unit 345 calls the play frame rate of the movie and frame rate control module 31 shot by the shooting device 2, and the movie dividing unit 345 divides the movie into single frame pictures equal to the number of play frequencies.
As shown in fig. 4, the film replacing unit 346 divides the number of single frame pictures by x to obtain a curtain replacing frame number, the film replacing unit 346 replaces the single frame pictures with the curtain replacing frame number in the film, the single frame pictures of adjacent frames of the curtain pictures are all original pictures, and the film replacing module transmits the processed play content to the post-processing module 34.
As shown in fig. 4, the automatic frame inserting unit 348 checks the film content and selects the frame number frame with the monotonous frame color in the film content before replacing the single frame equal to the frame number of the curtain replacement frame in the single frame of the film with the curtain frame, and selects the start frame for inserting the curtain frame according to the selected play frame distribution.
As shown in fig. 4, the graphics creation unit 347 records the order of the curtain picture and the original picture in the replaced movie picture, forming a movie frame number distribution map. The post-processing module 34 selects all the curtain pictures in the film according to the film frame number distribution map, and processes the curtain pictures after confirming that the curtain pictures are normal. The post-processing module 34 processes the original pictures in the film according to the film frame number distribution map.
The implementation principle of the LED background and green curtain shooting synthesis system in the embodiment of the application is as follows: the curtain pictures are evenly distributed in the film, the influence on the playing effect is smaller, the film frame number distribution diagram can help staff to check whether the automatically processed film has a problem or not, and can also help staff to process the curtain and the LED background.
The embodiments of the present invention are all preferred embodiments of the present invention, and are not intended to limit the scope of the present invention in this way, therefore: all equivalent changes in structure, shape and principle of the invention should be covered in the scope of protection of the invention.

Claims (8)

1. The LED background and curtain shooting synthesis method is characterized by comprising the following steps of:
building an LED large screen (1);
setting a curtain shooting frame rate, and adjusting the frame rate of the LED large screen (1) to be x times of the curtain shooting frame rate;
the frame rate of the video shot by the camera is the shooting frame rate of the camera, and the shooting frame rate of the camera is controlled to be the same as the frame rate of the LED large screen (1);
dividing the playing content of the LED large screen (1) according to the current frame rate of the LED large screen (1), wherein each frame of playing content is used as a single frame picture;
dividing the number of single-frame pictures of the played content by x to obtain a curtain replacement frame number;
replacing the appointed number of single-frame pictures in the single-frame pictures of the play content with curtain pictures, wherein the appointed number is equal to the number of the replaced frames of the curtain, and the single-frame pictures of adjacent frames of the curtain pictures are all original pictures;
the LED large screen (1) plays the processed picture and shoots a film;
and processing the shot film background.
2. The LED background and curtain shooting synthesis method is characterized by comprising the following steps of:
building an LED large screen (1);
setting a curtain shooting frame rate, and adjusting the frame rate of the LED large screen (1) to be x times of the curtain shooting frame rate;
the frame rate of the video shot by the camera is the shooting frame rate of the camera, and the shooting frame rate of the camera is controlled to be the same as the frame rate of the LED large screen (1);
after shooting a film, performing pre-processing on the film, dividing the film according to the current frame rate, and taking each frame of film as a single frame of picture;
dividing the number of single-frame pictures of the film by x to obtain the number of curtain replacement frames;
replacing the appointed number of single-frame pictures in the single-frame pictures of the film with curtain pictures, wherein the appointed number is equal to the number of the replaced frames of the curtain, and the single-frame pictures of adjacent frames of the curtain pictures are all original pictures;
and processing the shot film background.
3. The LED background and curtain shooting combining method of claim 1, wherein: the number of the original pictures between adjacent curtain pictures is the number of the gap pictures, the number of the gap pictures is calculated, and the number of the gap pictures is x-1;
recording the sequence of a curtain picture and an original picture in the replaced play picture to form a picture frame number distribution map;
after shooting the film, each frame of the film is checked according to the frame number distribution map of the film, and the curtain background and the LED background are respectively processed according to the frame number distribution map of the film.
4. The LED background and curtain shooting combining method of claim 2, wherein: the number of the original pictures between adjacent curtain pictures is the number of the gap pictures, the number of the gap pictures is calculated, and the number of the gap pictures is x-1;
recording the sequence of a curtain picture and an original picture in the replaced film picture to form a film frame number distribution map;
selecting all the curtain pictures in the film according to the film frame number distribution map, and processing the curtain pictures after confirming that the curtain pictures are normal;
and processing the original picture in the film according to the film frame number distribution diagram.
5. The LED background and curtain shooting combining method of claim 3, wherein: before a single frame picture which is equal to the frame number of the screen replacement in the single frame picture of the playing content is replaced by the screen picture, the playing content of the LED large screen (1) is checked, the picture with the most monotonous set frame number in the playing content is selected, and the initial frame in which the screen picture is inserted is selected according to the selected playing picture distribution.
6. The LED background and curtain shooting combining method of claim 4, wherein: before a single frame picture which is equal to the frame number of the screen replacement frame in the single frame picture of the film is replaced by the screen picture, the film content is checked, the picture with the set frame number and the monotonous picture color in the film content are selected, and the initial frame for inserting the screen picture is selected according to the selected playing picture distribution.
7. The utility model provides a synthetic system is shot to LED background and curtain which characterized in that: the system comprises an LED large screen (1), shooting equipment (2) and a control system (3), wherein the control system (3) comprises a frame rate control module (31), a shooting synchronization module (32), a film shooting module (33) and a post-processing module (34);
the frame rate control module (31) receives the input curtain frame rate, and the frame rate control module (31) adjusts the play frame rate of the LED large screen (1) to be x times of the curtain frame rate;
the shooting synchronization module (32) invokes the playing frame rate of the frame rate control module (31) to synchronize the shooting frame rate of the shooting equipment (2) with the playing frame rate;
the film shooting module (33) includes a picture dividing unit (341) and a content replacing unit (342);
the picture dividing unit (341) calls the playing content of the LED large screen (1) and the playing frequency of the frame rate control module (31), and the picture dividing module divides the playing content into single-frame pictures with the number equal to the playing frequency;
the content replacement unit (342) divides the number of single-frame pictures by x to obtain a curtain replacement frame number, the content replacement module replaces single-frame pictures which are equal to the curtain replacement frame number in the playing content with curtain pictures, the single-frame pictures of adjacent frames of the curtain pictures are original pictures, the content replacement module transmits the processed playing content to the LED large screen (1) for playing, and the shooting equipment (2) transmits a film to the post-processing module (34) after shooting the film;
the post-processing module (34) performs post-processing on the film received and shot.
8. The utility model provides a synthetic system is shot to LED background and curtain which characterized in that: the system comprises an LED large screen (1), shooting equipment (2) and a control system (3), wherein the control system (3) comprises a frame rate control module (31), a shooting synchronization module (32), a film shooting module (33) and a post-processing module (34);
the frame rate control module (31) receives the input curtain frame rate, and the frame rate control module (31) adjusts the play frame rate of the LED large screen (1) to be x times of the curtain frame rate;
the shooting synchronization module (32) invokes the playing frame rate of the frame rate control module (31) to synchronize the shooting frame rate of the shooting equipment (2) with the playing frame rate;
the film shooting module (33) comprises a film dividing unit (345) and a film replacing unit (346);
the film dividing unit (345) calls the playing frame rate of the film and frame rate control module (31) shot by the shooting equipment (2), and the film dividing unit (345) divides the film into single-frame pictures with the number equal to the playing frequency;
the film replacing unit (346) divides the number of single-frame pictures by x to obtain a curtain replacing frame number, the film replacing unit (346) replaces single-frame pictures which are equal to the curtain replacing frame number in a film with curtain pictures, the single-frame pictures of adjacent frames of the curtain pictures are original pictures, and the film replacing module transmits the processed playing content to the post-processing module (34);
the post-processing module (34) performs post-processing on the film received and shot.
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