CN105654471A - Augmented reality AR system applied to internet video live broadcast and method thereof - Google Patents
Augmented reality AR system applied to internet video live broadcast and method thereof Download PDFInfo
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- CN105654471A CN105654471A CN201510989267.2A CN201510989267A CN105654471A CN 105654471 A CN105654471 A CN 105654471A CN 201510989267 A CN201510989267 A CN 201510989267A CN 105654471 A CN105654471 A CN 105654471A
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- 238000000034 method Methods 0.000 title claims abstract description 51
- 238000001514 detection method Methods 0.000 claims abstract description 45
- 238000000605 extraction Methods 0.000 claims abstract description 32
- 230000000007 visual effect Effects 0.000 claims abstract description 10
- 230000008569 process Effects 0.000 claims description 17
- 238000010030 laminating Methods 0.000 claims description 11
- 239000007787 solid Substances 0.000 claims description 5
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- 230000003321 amplification Effects 0.000 claims description 4
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- 230000015572 biosynthetic process Effects 0.000 description 1
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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]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10016—Video; Image sequence
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Abstract
The invention discloses an augmented reality AR system applied to internet video live broadcast. The augmented reality AR system comprises an augmented reality AR unit, a camera, a database and a display unit. The augmented reality AR unit is respectively connected with the camera, the database and the display unit. The augmented reality AR unit comprises a detection module, an extraction module and a superposition module. The detection module is used for detecting whether an original background meets the AR processing requirements. The extraction module is connected with the detection module and used for extracting a foreground target image of a video frame. The superposition module is connected with the extraction module and used for superposing a replacing image or video with the foreground target image. Any backgrounds can be dynamically replaced so that interestingness of the video can be effectively enhanced, and visual impact of the video can be enhanced; a user assigns the replacing image or video and then can achieve the objective of replacing the video background so that operation is easy; meanwhile, the method has low requirements for the performance of a computer and can be realized on a PC and a mobile phone android system.
Description
Technical field
The present invention relates to video imaging technique field, particularly relate to and be applied to the augmented reality AR system and method that internet video is live.
Background technology
At present, online amusement platform is numerous, and main broadcasters' residence can be carried out net cast at home. Owing to shooting environmental is dull, cause that program shortage is interesting, captivation is not strong, it is therefore desirable to the excellent performance providing a kind of technology simple to operate to be main broadcaster sets off atmosphere by contrast, strengthens visual impact. Mostly adopting picture superimposing technique at present, picture superimposing technique is that two pictures are merged according to different transparencys, it is also possible to change the atmosphere of original picture; But the limited efficiency that picture superimposing technique is brought, and can not arbitrarily change background.
Augmented reality (AugmentedReality is called for short AR) is one of study hotspot of the numerous well-known university of Abroad in Recent Years and research institution; Augmented reality AR technology is the emerging technology that development in recent years is got up, and its core is that the content of virtual content and necessary being is carried out real time fusion, formed virtual, real between interaction, thus createing brand-new experience. Virtual studio is exactly typical augmented reality system, and the virtual scene that the personage of real scene shooting draws with computer is organically combined by it, is presented in face of spectators with brand-new visual effect. But virtual studio is the system of a set of complexity, expensive, complex operation, and program making person has technology requirement, the operational performance of computer is required significantly high by simultaneously traditional augmented reality AR technology.
Summary of the invention
For the weak point existed in the problems referred to above, the present invention provides and is applied to the augmented reality AR system and method that internet video is live.
For achieving the above object, the invention provides and a kind of be applied to the augmented reality AR system that internet video is live, including: augmented reality AR unit, photographic head, data base and display unit;
Described photographic head is used for gathering original background and the frame of video with foreground target image and original background;
Described data base is used for storing replacement image or video;
Described display unit is for showing the result of augmented reality AR unit;
Described augmented reality AR unit is connected with described photographic head, data base and display unit respectively, and described augmented reality AR unit includes detection module, extraction module and laminating module;
Whether described detection module meets AR for the original background detecting camera collection processes requirement, when meeting the requirements, sends and extract signal in extraction module;
Described extraction module is connected with described detection module, for the foreground target image according to described extraction signal extraction frame of video;
Described laminating module is connected with described extraction module, for replacement image or video and foreground target image being overlapped.
As a further improvement on the present invention, described augmented reality AR unit also includes amplifying/reduce module, described amplification/reduce module is arranged between described extraction module and described laminating module, for the foreground target image extracted being zoomed in or out before superposition.
As a further improvement on the present invention, described detection module includes variance detection module and number of edges detection module.
As a further improvement on the present invention, when original background do not meet AR process require time, detection module sends to photographic head and again gathers the signal of original background.
The invention also discloses a kind of using method being applied to the live augmented reality AR system of internet video, including:
Step one, gather original background and detect described original background whether meet AR process requirement, when testing result is for meeting, then enter step 2;
Step 2, gather with the frame of video of foreground target image and described original background, and extract the foreground target image of frame of video;
Step 3, by the foreground target image of extraction with replace background be overlapped, form new visual pattern, described replacement background includes: image or video.
As a further improvement on the present invention, described original background is solid background.
As a further improvement on the present invention, described step one detecting whether, the foundation meeting AR process requirement is: variance detection and number of edges detect;
The formula of described variance detection is:
Wherein: D (X) represents that variance, X represent original background image, and E (X) represents the meansigma methods of original background image, xiRepresenting pixel value, n represents number of pixels;
The method of described number of edges detection is: adopt Sobel operator detection number of edges;
When variance and number of edges are respectively less than the threshold value of its setting, then it is judged to: original background meets AR and processes requirement.
As a further improvement on the present invention, when the testing result in step one is not for meeting, adjusts described original background, and repeat step one.
As a further improvement on the present invention, the method for the foreground target image extracting frame of video in described step 2 is:
Based on mixed Gauss model GMM, the pixel of frame of video is mated with each distribution of mixed Gauss model GMM;
|X-��i|�ܦ˦�i
Wherein: X represents pixel value, ��iRepresent the average of Gauss distribution, ��iRepresenting the variance of Gauss distribution, �� represents the threshold value of Gauss distribution variance;
When pixel and certain Gauss distribution meet above formula, then this pixel and Gauss distribution match, for background dot; It it is otherwise foreground point.
As a further improvement on the present invention, step 4 is also included between described step 2 and step 3;
Described step 4 is, after being zoomed in or out as required by the foreground target image of frame of video, be moved into the position specified.
Compared with prior art, the invention have the benefit that
The invention provides and be applied to the augmented reality AR system and method that internet video is live, including augmented reality AR unit, photographic head, data base and display unit; Realize original background detection by said structure, extract foreground target image, replace background. The invention solves online amusement platform main broadcaster because shooting environmental is dull, the problem of live video shortage captivation, user's dynamic changes any background, it is possible to effectively promotes the interest of video, strengthen the visual impact of video; User specifies replacement image or video, so that it may reach to change the purpose of video background, simple to operate; The method is not high to the performance requirement of computer simultaneously, it is possible to realize on PC, mobile phone Android system.
Accompanying drawing explanation
Fig. 1 is the frame diagram being applied to the live augmented reality AR system of internet video disclosed in an embodiment of the present invention;
Fig. 2 is the method flow diagram being applied to the live augmented reality AR of internet video disclosed in an embodiment of the present invention;
Fig. 3 is original background figure disclosed in an embodiment of the present invention;
Fig. 4 is that an embodiment of the present invention is disclosed replaces background;
Fig. 5 is the disclosed frame of video figure with foreground target image of an embodiment of the present invention;
Fig. 6 is the new images that an embodiment of the present invention disclosed replacement image and foreground target image are overlapped formation.
In figure: 1, augmented reality AR unit; 1-1, detection module; 1-2, extraction module; 1-3, laminating module; 1-4, amplification/reduce module; 2, photographic head; 3, data base; 4 display units.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is a part of embodiment of the present invention, rather than whole embodiments. Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the premise not making creative work, broadly fall into the scope of protection of the invention.
The invention discloses and a kind of be applied to the augmented reality AR system that internet video is live, including: augmented reality AR unit, photographic head, data base and display unit; Photographic head is used for gathering original background and the frame of video with foreground target image and original background; Data base is used for storing replacement image or video; Display unit is for showing the result of augmented reality AR unit; Augmented reality AR unit is connected with photographic head, data base and display unit respectively, and augmented reality AR unit includes detection module, extraction module and laminating module; Whether detection module meets AR for the original background detecting camera collection processes requirement, when meeting the requirements, sends and extract signal in extraction module; Extraction module is connected with detection module, for according to the foreground target image extracting signal extraction frame of video; Laminating module is connected with extraction module, for replacement image or video and foreground target image being overlapped. The invention also discloses a kind of augmented reality AR method that internet video is live that is applied to, gather original background and detect whether original background meets AR process requirement, when testing result is for meeting, then entering next step;Gather the frame of video with foreground target image and original background, and extract the foreground target image of frame of video; The foreground target image of extraction is overlapped with replacing background, forms new visual pattern, replace background and include: image or video. The invention solves online amusement platform main broadcaster because shooting environmental is dull, the problem of live video shortage captivation, user's dynamic changes any background, it is possible to effectively promotes the interest of video, strengthen the visual impact of video; User specifies replacement image or video, so that it may reach to change the purpose of video background, simple to operate; The method is not high to the performance requirement of computer simultaneously, it is possible to realize on PC, mobile phone Android system.
Below in conjunction with accompanying drawing, the present invention is described in further detail:
Embodiment 1: as it is shown in figure 1, an object of the present disclosure is in that providing a kind of is applied to the augmented reality AR system that internet video is live, including: augmented reality AR unit 1, photographic head 2, data base 3 and display unit 4;
Photographic head 2 is for gathering the original background without target, and gathers the frame of video with foreground target image and original background, and data base 3 is used for storing replacement image or video, and display unit 4 is for showing the result of augmented reality AR unit; Augmented reality AR unit 1 is connected with photographic head 2, data base 3 and display unit 4 respectively.
Augmented reality AR unit 1 includes detection module 1-1, extraction module 1-2, laminating module 1-3 and amplification/reduce module 1-4. Detection module 1-1 is connected with photographic head 2, and whether the original background for detecting camera collection meets AR processes requirement, when meeting the requirements, sends and extract signal in extraction module; Detection module 1-1 farther includes variance detection module and number of edges detection module; Extraction module 1-2 is connected with detection module 1-1, based on mixed Gauss model GMM and according to the foreground target image extracting signal extraction frame of video; Laminating module 1-3 is connected with extraction module 1-2 by amplifying/reduce module 1-4, and for being overlapped replacing background with the foreground target image through zooming in or out, replacing background can be image or video.
Embodiment 2: as shown in figures 2-6, the present invention the second purpose is in that to provide a kind of using method being applied to the live augmented reality AR system of internet video, including:
1., initialize:
In detection module, set the threshold value of the threshold value of variance, number of edges, in extraction module, set the threshold value of Gauss distribution variance.
2., camera collection is without the original background of target, original background is solid background, and solid background is the background (such as blue or white) of solid color, as shown in Figure 3, it is passed in the detection module in augmented reality AR unit, and fixing camera.
3., detection module detection without the original background image of target whether meet AR process requirement, utilize variance and number of edges to detect:
The formula of variance detection is:
Wherein: D (X) represents that variance, X represent original background image, and E (X) represents the meansigma methods of original background image, xiRepresenting pixel value, n represents number of pixels;
The method of rim detection is: adopt Sobel operator detection number of edges. Sobel operator is Sobel Operator, and it is a kind of important process method of computer vision field, is mainly used in obtaining the First-order Gradient of digital picture, and common application and physical significance are rim detection. Technically, it is a discrete first difference operator, is used for calculating the approximation of the First-order Gradient of brightness of image function. This operator is used, it will produce gradient vector corresponding to this point or its law vector in any point of image;
When variance and number of edges are respectively less than the threshold value of its setting, original background meets AR and processes requirement, then forward step to 4.;When not meeting AR process and requiring, adjust original background, and repeat step 2., 3..
4., under the original background of satisfied requirement, by the above-mentioned fixed camera collection frame of video with foreground target image and original background, as it is shown in figure 5, in the receiver module being passed in augmented reality AR unit;
Background image is set up mixed Gauss model GMM by augmented reality AR unit; Gaussian modeling is based on the method for expressing of pixel samples statistical information, the statistical information such as probability density (such as pattern quantity, the average of each pattern and standard deviation) utilizing pixel great amount of samples value in a long time represents background, then uses statistics difference (such as 3 �� principles) to carry out foreground target image pixel judgement. The number of mixed Gauss model is relevant with the performance of computer, and the present invention uses 4 Gauss models to carry out the feature of each pixel in phenogram picture.
5. the foreground target image of frame of video, is extracted: concrete extracting method is:
Based on mixed Gauss model GMM, the pixel of frame of video is mated with each distribution of mixed Gauss model GMM;
|X-��i|�ܦ˦�i
Wherein: X represents pixel value, ��iRepresent the average of Gauss distribution, ��iRepresenting the variance of Gauss distribution, �� represents the threshold value of Gauss distribution variance;
When pixel and certain Gauss distribution meet above formula, then this pixel and Gauss distribution match, for background dot; It it is otherwise foreground point.
6., the foreground target image of frame of video is zoomed in or out as required after, be moved into the position specified.
7., selecting to replace background in data base, replacing background is image or video, as shown in Figure 4, is passed in the replacement module of augmented reality AR unit; In replacement module, the foreground target image replacing image or video and frame of video is overlapped, forms new visual pattern, as shown in Figure 6.
The invention provides and be applied to the augmented reality AR system and method that internet video is live, including augmented reality AR unit, photographic head, data base and display unit; Realize original background detection by said structure, extract foreground target image, replace background. The invention solves online amusement platform main broadcaster because shooting environmental is dull, the problem of live video shortage captivation, user's dynamic changes any background, it is possible to effectively promotes the interest of video, strengthen the visual impact of video; User specifies replacement image or video, so that it may reach to change the purpose of video background, simple to operate; The method is not high to the performance requirement of computer simultaneously, it is possible to realize on PC, mobile phone Android system.
These are only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations. All within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (10)
1. one kind is applied to the augmented reality AR system that internet video is live, it is characterised in that including: augmented reality AR unit, photographic head, data base and display unit;
Described photographic head is used for gathering original background and the frame of video with foreground target image and original background;
Described data base is used for storing replacement image or video;
Described display unit is for showing the result of augmented reality AR unit;
Described augmented reality AR unit is connected with described photographic head, data base and display unit respectively, and described augmented reality AR unit includes detection module, extraction module and laminating module;
Whether described detection module meets AR for the original background detecting camera collection processes requirement, when meeting the requirements, sends and extract signal in extraction module;
Described extraction module is connected with described detection module, for the foreground target image according to described extraction signal extraction frame of video;
Described laminating module is connected with described extraction module, for replacement image or video and foreground target image being overlapped.
2. it is applied to the augmented reality AR system that internet video is live as claimed in claim 1, it is characterized in that, described augmented reality AR unit also includes amplifying/reduce module, described amplification/reduce module is arranged between described extraction module and described laminating module, for the foreground target image extracted being zoomed in or out before superposition.
3. it is applied to the augmented reality AR system that internet video is live as claimed in claim 1, it is characterised in that described detection module includes variance detection module and number of edges detection module.
4. be applied to the augmented reality AR system that internet video is live as claimed in claim 1, it is characterised in that when original background do not meet AR process require time, detection module sends to photographic head and again gathers the signal of original background.
5. the using method being applied to the live augmented reality AR system of internet video as described in a claim any one of claim 1-4, it is characterised in that including:
Step one, gather original background and detect described original background whether meet AR process requirement, when testing result is for meeting, then enter step 2;
Step 2, gather with the frame of video of foreground target image and described original background, and extract the foreground target image of frame of video;
Step 3, by the foreground target image of extraction with replace background be overlapped, form new visual pattern, described replacement background includes: image or video.
6. it is applied to the using method of the live augmented reality AR system of internet video as claimed in claim 5, it is characterised in that described original background is solid background.
7. it is applied to the using method of the live augmented reality AR system of internet video as claimed in claim 5, it is characterised in that described step one detecting whether, the foundation meeting AR process requirement is: variance detection and number of edges detect;
The formula of described variance detection is:
Wherein: D (X) represents that variance, X represent original background image, and E (X) represents the meansigma methods of original background image, xiRepresenting pixel value, n represents number of pixels;
The method of described number of edges detection is: adopt Sobel operator detection number of edges;
When variance and number of edges are respectively less than the threshold value of its setting, then it is judged to: original background meets AR and processes requirement.
8. it is applied to the using method of the live augmented reality AR system of internet video as claimed in claim 5, it is characterised in that when the testing result in step one is not for meeting, adjusts described original background, and repeat step one.
9. it is applied to the using method of the live augmented reality AR system of internet video as claimed in claim 5, it is characterised in that the method for the foreground target image extracting frame of video in described step 2 is:
Based on mixed Gauss model GMM, the pixel of frame of video is mated with each distribution of mixed Gauss model GMM;
|X-��i|�ܦ˦�i
Wherein: X represents pixel value, ��iRepresent the average of Gauss distribution, ��iRepresenting the variance of Gauss distribution, �� represents the threshold value of Gauss distribution variance;
When pixel and certain Gauss distribution meet above formula, then this pixel and Gauss distribution match, for background dot; It it is otherwise foreground point.
10. it is applied to the using method of the live augmented reality AR system of internet video as claimed in claim 5, it is characterised in that between described step 2 and step 3, also include step 4;
Described step 4 is, after being zoomed in or out as required by the foreground target image of frame of video, be moved into the position specified.
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