CN110049345A - A kind of multiple video strems director method and instructor in broadcasting's processing system - Google Patents
A kind of multiple video strems director method and instructor in broadcasting's processing system Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/21—Server components or server architectures
- H04N21/218—Source of audio or video content, e.g. local disk arrays
- H04N21/2187—Live feed
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
- H04N21/23412—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs for generating or manipulating the scene composition of objects, e.g. MPEG-4 objects
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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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Abstract
The present invention relates to a kind of multiple video strems director method and instructor in broadcasting's processing systems, this method comprises: obtaining the multi-path video stream that multiple seat in the plane photographic devices are sent, which includes main video flowing and multichannel auxiliary video stream all the way；It is extracted according to each main video image that intended pixel extracts the main video flowing of coordinate pair, obtains region-of-interest image corresponding with each main video image；The position coordinates of each target object in region-of-interest image are detected, and calculate the density focus point of all target objects according to the position coordinates of each target object；Output image is selected to be shown from multi-path video stream in the position of region-of-interest image according to the density focus point of all target objects.Multiple video strems director method of the invention and multiple video strems director system acquire multi-path video stream, each main video image of main video flowing is extracted and analyzed, to select output image, realize to target object automatically track and Autoconducting (automatic switchover of multimachine position picture).
Description
Technical field
The present invention relates to technical field of image processing more particularly to a kind of multiple video strems director method and instructor in broadcasting's processing systems
System.
Background technique
Currently, needing photographer to cooperate to complete with director instructor in broadcasting the live streaming of competitive sports in the market.For example, football ratio
Detailed process is as follows for the live streaming of match: photographer is responsible for shooting designated place, ball, specific crowd and specific scene, and by compiling
It leads optionally to carry out the switch operating of picture.
However, the direct-seeding that photographer cooperates to complete with director instructor in broadcasting has the disadvantage that first, it is at high cost, for example,
When race is held in some social courts and campus, if looking for photographer and director, time cost and human cost are too
It is high；Second, coordination flexibility is poor, for example, it is difficult to coordinate the time of photographer and director, causes to will affect shooting effect；The
Three, net cast is difficult, for example, some races can abandon videograph since personnel cost is high and coordination flexibility is poor.
Therefore it provides a kind of multiple video strems director method and instructor in broadcasting's processing system.
Summary of the invention
In view of the above problems, it proposes on the present invention overcomes the above problem or at least be partially solved in order to provide one kind
The multiple video strems director method and instructor in broadcasting's processing system of problem are stated, at high cost, coordination flexibility difference is solved and net cast is difficult
The problem of.
According to an aspect of the present invention, a kind of multiple video strems director method is provided, comprising the following steps:
Obtain the multi-path video stream that multiple seat in the plane photographic devices are sent, which includes main video flowing and more all the way
Road auxiliary video stream；
It is extracted, is obtained and each main view according to each main video image that intended pixel extracts the main video flowing of coordinate pair
The corresponding region-of-interest image of frequency image；
The position coordinates of each target object in region-of-interest image are detected, and are calculated according to the position coordinates of each target object
The density focus point of all target objects；
It is selected from multi-path video stream according to the density focus point of all target objects in the position of region-of-interest image defeated
Image is shown out.
Further, above-mentioned multiple video strems director method, further includes: when exporting image is main video image, with target
Main view frequency image interception is shown at the image of predefined size and predetermined ratio centered on the density focus point of object.
Further, above-mentioned multiple video strems director method, further includes: when exporting image is auxiliary video image, auxiliary
Video image original image is directly shown.
Further, above-mentioned multiple video strems director method is extracting each of the main video flowing of coordinate pair according to intended pixel
Before a main video image extracts, further includes: carry out pumping frame to the main video image of main video flowing, be selected for the master extracted
Video image.
Further, above-mentioned multiple video strems director method, by main view frequency centered on the density focus point by target object
Before image interception is shown at the image of predefined size and predetermined ratio, further includes: using Kalman filtering to time sequence
The density focus point of target object and the predefined size of image are smoothed on column.
Further, the position coordinates of each target object in region-of-interest image are detected, and according to the position of each target object
Set the density focus point that coordinate calculates all target objects, comprising:
Save the coordinate of region-of-interest image；
Using each target object in YOLO algorithm detection region-of-interest image, and save each target object detected
Coordinate；
The density focus point of all target objects is calculated according to the coordinate of each target object detected.
Further, according to the density focus point of all target objects in the position of region-of-interest image from multi-path video stream
Middle selection output image is shown, comprising:
Region-of-interest image is divided into multiple Zone switched, each Zone switched and each road video flowing according to preset dividing line
It corresponds；
When the density focus point of all target objects from first it is Zone switched be transferred to second it is Zone switched when, switching output
It is Zone switched corresponding with second to export image for image after switching.
According to another aspect of the present invention, a kind of multiple video strems director system is provided, comprising:
Video flowing obtains module, the multi-path video stream sent for obtaining multiple seat in the plane photographic devices, the multi-channel video figure
As including main video flowing and multichannel auxiliary video stream all the way；
Region-of-interest image zooming-out module, for extracting each main view frequency of the main video flowing of coordinate pair according to intended pixel
Image extracts, and obtains region-of-interest image corresponding with each main video image；
Density focus point computing module, the position coordinates of each target object for detecting region-of-interest image, and according to
The position coordinates of each target object calculate the density focus point of all target objects；
It exports image and chooses module, for the density focus point according to all target objects in the position of region-of-interest image
Selection output image is shown from multi-path video stream.
Further, above-mentioned multiple video strems director system, further includes: output image processing module, in output image
When for main video image, by main view frequency image interception at predefined size and predetermined ratio centered on the density focus point of target object
The image of example is shown.
Further, above-mentioned multiple video strems director system, further includes: output image processing module is also used in output figure
When as to assist video image, auxiliary video image original image is directly shown.
The present invention has the advantage that compared with prior art
1. multiple video strems director method of the invention and multiple video strems director system acquire multi-path video stream, to main video flowing
Each main video image extract and analyze, to select output image, realize to target object automatically track and from
Dynamic instructor in broadcasting (automatic switchover of multimachine position picture)；
2. multiple video strems director method and multiple video strems director system of the invention export image be main video image when,
Main view frequency image interception is shown at the image of predefined size and predetermined ratio centered on the density focus point of target object
Show, realizes the autozoom to target object.
Detailed description of the invention
Below in conjunction with drawings and examples, the invention will be further described.
Fig. 1 is multiple video strems director method block diagram of the invention；
Fig. 2 is that the density focus point of all target objects of the invention calculates block diagram；
Fig. 3 is output image selection step figure of the invention；
Fig. 4 is multiple video strems director system block diagram of the invention.
Specific embodiment
Exemplary embodiments of the present disclosure are described in more detail below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
It is fully disclosed to those skilled in the art.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singular " one " used herein, " one
It is a ", " described " and "the" may also comprise plural form.It is to be further understood that being arranged used in specification of the invention
Diction " comprising " refer to that there are the feature, integer, step, operation, element and/or component, but it is not excluded that in the presence of or addition
Other one or more features, integer, step, operation, element, component and/or their group.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art
Language and scientific term), there is meaning identical with the general understanding of those of ordinary skill in fields of the present invention.Should also
Understand, those terms such as defined in the general dictionary, it should be understood that have in the context of the prior art
The consistent meaning of meaning, and unless otherwise will not be explained in an idealized or overly formal meaning by specific definitions.Fig. 1
It is multiple video strems director method block diagram of the invention, referring to Fig. 1, multiple video strems director method provided by the invention, including with
Lower step:
S110, obtains the multi-path video stream that multiple seat in the plane photographic devices are sent, which includes the frequency of main view all the way
Stream and multichannel auxiliary video stream.
For example, when multiple video strems director method of the invention is broadcast live for football match, available three seat in the plane camera
The three road video flowings sent, three seat in the plane cameras can be arranged to left side camera, intermediate camera and the right side relative to football pitch
Side camera.Meanwhile three road video flowings of acquisition guarantee three road video stream synchronizations by timestamp information.
S120, according to intended pixel extract the main video flowing of coordinate pair each main video image extract, obtain with
The corresponding region-of-interest image of each main video image.
Herein, region-of-interest image can be hexagonal area, in the main video image of input, it is only necessary to analyze court
Partial information, but position and angle due to camera, it may appear that many inactive areas, inactive area can occupy hardware money
Source, and influence calculating speed.It is that for camera since place limits, will lead to can not capture entire ball using the reason of hexagon
Field picture.In this case, hexagon can be presented in court.To main view frequency image cropping at hexagonal image, greatly reduce to hard
The consumption and raising calculating speed of part resource.
S130 detects the position coordinates of each target object in region-of-interest image, and is sat according to the position of each target object
Mark calculates the density focus point of all target objects.
Specifically, as shown in Fig. 2, detecting the position coordinates of each target object in region-of-interest image, and according to each target
The position coordinates of object calculate the density focus point of all target objects, comprising:
S131 saves the coordinate of region-of-interest image；
S132, using YOLO, (You only look once, only reading through picture can all be identified all objects
Coming) algorithm detects each target object in region-of-interest image, and saves the coordinate of each target object detected；
S133 calculates the density focus point of all target objects according to the coordinate of each target object detected；
S140 is selected from multi-path video stream according to the density focus point of all target objects in the position of region-of-interest image
It selects output image and carries out display region-of-interest image.
In detail, as shown in figure 3, according to position of the density focus point of all target objects in region-of-interest image from
Selection output image is shown in multi-path video stream, comprising:
Region-of-interest image is divided into multiple Zone switched, each Zone switched and each road according to preset dividing line by S141
Video flowing corresponds；
S142, when the density focus point of all target objects from first it is Zone switched be transferred to second it is Zone switched when, cut
Output image is changed, it is Zone switched corresponding with second that image is exported after switching.
Specifically, it after receiving three road video flowings, is read by frame, every frame reads left, center, right three and opens image, by paying close attention to area
Three on area image are Zone switched, for example, it is left it is Zone switched, in the Zone switched and right side it is Zone switched, detect region-of-interest image
Interior sportsman finds the focus point of sportsmen according to the position of sportsmen, judges focus point location by the focus point of sportsmen
Domain three it is Zone switched which it is Zone switched in, then determine using in three images which, if in middle switch area
Domain, it is Zone switched if it is a left side just using the image of intermediate camera, with regard to the image of camera on the left of use, if it is right cut
Region is changed, with regard to the image of camera on the right side of use.
Multiple video strems director method of the invention acquires multi-path video stream, to each main video image of main video flowing into
Row extracts and analysis, to select output image, realize to target object automatically track and Autoconducting (multimachine position picture from
Dynamic switching).
Further, multiple video strems director method, further includes: when exporting image is main video image, with target object
Density focus point centered on main view frequency image interception is shown at the image of predefined size and predetermined ratio.
Specifically, it according to the center of gravity and standard deviation of the crowd density of calculating, is calculated by the center of gravity and standard deviation of crowd density
Figure size is cut out, and cuts out figure ratio (usual 16:9) according to the adjustment of figure size is cut out, then exports the image cut out.
Further, multiple video strems director method, further includes: when exporting image is auxiliary video image, assist video
Image original image is directly shown.
Specifically, when the focus point of sportsmen is when left Zone switched, the image of left side camera is directly displayed；Work as sportsman
Focus point when right Zone switched, directly display the image of right side camera.Without handling the auxiliary video image of switching,
Computing resource is reduced, is played more smooth.
Multiple video strems director method of the invention is when exporting image is main video image, with the density center of gravity of target object
Main view frequency image interception is shown at the image of predefined size and predetermined ratio centered on point, realize to target object from
Dynamic zoom.
Further, above-mentioned multiple video strems director method is extracting each of the main video flowing of coordinate pair according to intended pixel
Before a main video image extracts, further includes: carry out pumping frame to the main video image of main video flowing, be selected for the master extracted
Video image.
Specifically, in order to reduce computing resource, guarantee the fluency of output picture, at the pumping frame to main video image
Reason is specifically as follows and takes out 1 frame every 5 frames.
Further, above-mentioned multiple video strems director method, by main view frequency centered on the density focus point by target object
Before image interception is shown at the image of predefined size and predetermined ratio, further includes: using Kalman filtering to time sequence
The density focus point of target object and the predefined size of image are smoothed on column.
Further, multiple video strems director method, further includes: marked off and cut from region-of-interest image according to preset dividing line
Buffer swapping domain, when the density focus point of all target objects moves left and right in region-of-interest image, density center of gravity is clicked through
Enter after switching buffer area, will not horse back image switching, only cross switching buffer area when, image switching, to avoid frequent
Switching brings the discomfort on ornamental to spectators.
For embodiment of the method, for simple description, therefore, it is stated as a series of action combinations, but this field
Technical staff should be aware of, and embodiment of that present invention are not limited by the describe sequence of actions, because implementing according to the present invention
Example, some steps may be performed in other sequences or simultaneously.Secondly, those skilled in the art should also know that, specification
Described in embodiment belong to preferred embodiment, the actions involved are not necessarily necessary for embodiments of the present invention.
Fig. 4 is multiple video strems director system block diagram of the invention, referring to fig. 4, multiple video strems instructor in broadcasting system provided by the invention
System, comprising:
Video flowing obtains module 401, the multi-path video stream sent for obtaining multiple seat in the plane photographic devices, the multi-channel video
Image includes main video flowing and multichannel auxiliary video stream all the way；
Region-of-interest image zooming-out module 402, for extracting each master of the main video flowing of coordinate pair according to intended pixel
Video image extracts, and obtains region-of-interest image corresponding with each main video image；
Density focus point computing module 403, the position coordinates of each target object for detecting region-of-interest image, and root
The density focus point of all target objects is calculated according to the position coordinates of each target object；
It exports image and chooses module 404, for the density focus point according to all target objects in region-of-interest image
Position selects output image to be shown from multi-path video stream.
Multiple video strems director system of the invention acquires multi-path video stream, draws to each main video image of main video flowing
Determine court region, and analyze, to select output image, realize to target object automatically track and Autoconducting (is drawn multimachine position
Automatically switch in face).
Further, above-mentioned multiple video strems director system, further includes: output image processing module 405, for scheming in output
When as being main video image, main view frequency image interception at predefined size and is made a reservation for centered on the density focus point of target object
The image of ratio is shown.Further, above-mentioned multiple video strems director system, further includes: output image processing module is also used
In when exporting image is auxiliary video image, auxiliary video image original image is directly shown.
Multiple video strems director system of the invention is when exporting image is main video image, with the density center of gravity of target object
Main view frequency image interception is shown at the image of predefined size and predetermined ratio centered on point, realize to target object from
Dynamic zoom.
Density focus point computing module includes:
Region-of-interest image coordinate storage unit, for saving the coordinate of region-of-interest image；
Target object coordinate detection unit using each target object in YOLO algorithm detection region-of-interest image, and is protected
Deposit the coordinate of each target object detected；
Density focus point computing unit, for calculating all target objects according to the coordinate of each target object detected
Density focus point；
Output image chooses module
Region-of-interest image division unit, for region-of-interest image to be divided into multiple switch areas according to preset dividing line
Domain, each Zone switched and each road video flowing correspond；
Image switch unit is exported, Zone switched is transferred to the from first for the density focus point in all target objects
Two it is Zone switched when, switching output image, after switching export image it is Zone switched corresponding with second.
Further, multiple video strems director system, further includes: main video image takes out frame module, for according to predetermined picture
Before each main video image that element extracts the main video flowing of coordinate pair extracts, the main video image of main video flowing is carried out
Frame is taken out, the main video image extracted is selected for.
Specifically, in order to reduce computing resource, guarantee the fluency of output picture, at the pumping frame to main video image
Reason is specifically as follows and takes out 1 frame every 5 frames.
Further, multiple video strems director system, further includes: picture smooth treatment module, for target object
Before being shown main view frequency image interception at the image of predefined size and predetermined ratio centered on density focus point, card is utilized
Kalman Filtering is smoothed the density focus point of target object in time series and the predefined size of image, avoids generating
The concussion of video pictures.
Further, region-of-interest image division unit is also used to be divided according to preset dividing line from region-of-interest image
Switch buffer area out, when court region part of the density focus point in main video image of all target objects moves left and right
When, density focus point enter switching buffer area after, will not horse back image switching, only cross switching buffer area when, switching
Picture makes output picture not smooth, causes to bring the discomfort on ornamental to spectators to avoid the frequent switching due to picture.
For system embodiments, since it is basically similar to the method embodiment, related so being described relatively simple
Place illustrates referring to the part of embodiment of the method.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
Invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features；And these modification or
Replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (10)
1. a kind of multiple video strems director method, which comprises the following steps:
The multi-path video stream that multiple seat in the plane photographic devices are sent is obtained, which includes main video flowing and multiple auxiliary all the way
Help video flowing；
It is extracted according to each main video image that intended pixel extracts the main video flowing of coordinate pair, obtains and scheme with each main view frequency
As corresponding region-of-interest image；
The position coordinates of each target object in region-of-interest image are detected, and is calculated and is owned according to the position coordinates of each target object
The density focus point of target object；
Output is selected to scheme from multi-path video stream in the position of region-of-interest image according to the density focus point of all target objects
As being shown.
2. multiple video strems director method according to claim 1, which is characterized in that further include: when output image is main view
When frequency image, by main view frequency image interception at the figure of predefined size and predetermined ratio centered on the density focus point of target object
As being shown.
3. multiple video strems director method according to claim 2, which is characterized in that further include: when output image is auxiliary
When video image, auxiliary video image original image is directly shown.
4. multiple video strems director method according to claim 3, which is characterized in that extracting coordinate pair according to intended pixel
Before the main video image of each of main video flowing extracts, further includes: pumping frame is carried out to the main video image of main video flowing,
It is selected for the main video image extracted.
5. multiple video strems director method according to claim 4, which is characterized in that with the density focus point of target object
Centered on main view frequency image interception is shown at the image of predefined size and predetermined ratio before, further includes: utilize karr
Graceful filtering is smoothed the density focus point of target object in time series and the predefined size of image.
6. multiple video strems director method according to claim 1, which is characterized in that each target in detection region-of-interest image
The position coordinates of object, and calculate according to the position coordinates of each target object the density focus point of all target objects, comprising:
Save the coordinate of region-of-interest image；
Using each target object in YOLO algorithm detection region-of-interest image, and save the seat of each target object detected
Mark；
The density focus point of all target objects is calculated according to the coordinate of each target object detected.
7. multiple video strems director method according to claim 1, which is characterized in that according to the density weight of all target objects
Heart point selects output image to be shown in the position of region-of-interest image from multi-path video stream, comprising:
Region-of-interest image is divided into according to preset dividing line it is multiple Zone switched, it is each it is Zone switched with each road video flowing one by one
It is corresponding；
When the density focus point of all target objects from first it is Zone switched be transferred to second it is Zone switched when, switching output figure
It is Zone switched corresponding with second to export image for picture after switching.
8. a kind of multiple video strems director system characterized by comprising
Video flowing obtains module, the multi-path video stream sent for obtaining multiple seat in the plane photographic devices, the multiple paths of video images packet
Include main video flowing all the way and multichannel auxiliary video stream；
Region-of-interest image zooming-out module, for extracting each main video image of the main video flowing of coordinate pair according to intended pixel
It extracts, obtains region-of-interest image corresponding with each main video image；
Density focus point computing module, the position coordinates of each target object for detecting region-of-interest image, and according to each mesh
The position coordinates of mark object calculate the density focus point of all target objects；
Export image and choose module, for according to the density focus points of all target objects in the position of region-of-interest image from more
Selection output image is shown in the video flowing of road.
9. multiple video strems director system according to claim 8, which is characterized in that further include: output image processing module,
For export image be main video image when, by main view frequency image interception at pre- centered on the density focus point of target object
The image for determining size and predetermined ratio is shown.
10. multiple video strems director system according to claim 9, which is characterized in that further include: output image procossing mould
Block is also used to when exporting image to assist video image, and auxiliary video image original image is directly shown.
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| CN113784159A (en) * | 2021-09-03 | 2021-12-10 | 上海哔哩哔哩科技有限公司 | Multimedia data stream switching method and device |
| CN114401365A (en) * | 2021-12-31 | 2022-04-26 | 广东省教育研究院 | Target person identification method, video switching method and device |
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| WO2022206595A1 (en) * | 2021-03-31 | 2022-10-06 | 华为技术有限公司 | Image processing method and related device |
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