CN105376547A - Micro video course recording system and method based on 3D virtual synthesis technology - Google Patents
Micro video course recording system and method based on 3D virtual synthesis technology Download PDFInfo
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- CN105376547A CN105376547A CN201510793629.0A CN201510793629A CN105376547A CN 105376547 A CN105376547 A CN 105376547A CN 201510793629 A CN201510793629 A CN 201510793629A CN 105376547 A CN105376547 A CN 105376547A
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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
- H04N21/47—End-user applications
- H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
- H04N21/47217—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for controlling playback functions for recorded or on-demand content, e.g. using progress bars, mode or play-point indicators or bookmarks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/10—Processing, recording or transmission of stereoscopic or multi-view image signals
- H04N13/106—Processing image signals
- H04N13/122—Improving the 3D impression of stereoscopic images by modifying image signal contents, e.g. by filtering or adding monoscopic depth cues
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/10—Processing, recording or transmission of stereoscopic or multi-view image signals
- H04N13/106—Processing image signals
- H04N13/15—Processing image signals for colour aspects of image signals
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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
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
- H04N21/4334—Recording operations
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- Signal Processing (AREA)
- Databases & Information Systems (AREA)
- Human Computer Interaction (AREA)
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Abstract
The invention provides a micro video course recording system and method based on a 3D virtual synthesis technology. The micro video course recording method based on the 3D virtual synthesis technology comprises the steps: (1), keying figures in a video photographed by a video photographing apparatus by utilizing a figure collecting and processing module; (2), generating a virtual scene file by utilizing a scene processing module; (3), virtually synthesizing a keying foreground and the virtual scene file by utilizing an image synthesis module, thereby achieving movement and change of the figures photographed by the video photographing apparatus on a virtual scene; (4), photographing the movement and change of the figures on the virtual scene by utilizing a video recording and controlling module. According to the micro video course recording system and method based on the 3D virtual synthesis technology, by utilizing the virtual synthesis technology, the figures can be virtualized in any space and move in the virtual space; therefore, by the technology provided by the invention, teaching and practicing of teachers and students on a fixed location can be virtualized on abundant scenes.
Description
Technical field
The present invention relates to 3D dummy synthesis technology, be especially applied in the micro-class recording system based on 3D dummy synthesis technology and the method for teaching.
Background technology
" micro-class " full name " miniature video course ", it is main presentation mode with instructional video, the teaching process carried out around subject knowledge point, example exercise, knotty problem, experimental implementation etc. and the organic combination of related resource.
" micro-class " works feature:
1. " micro-class " core resource is " micro-video " (instructional video fragment), can comprise the complementary learning aid content such as " micro-teaching notes " (Instructional Design), " micro-courseware " (teaching courseware) relevant to this teaching video contents, " micro-exercise " (exercise test question), " micro-self-examination " (Reflective Teaching) simultaneously." duration is generally about 5 minutes, suggestion is no more than 10 minutes.
2. the designing requirement of micro-courseware is short and pithy, around the teaching courseware of emphasis, and has good compress mode, preferably stream media format, is convenient to the effect that Internet Transmission reaches shared.
3. realize the mode of courseware recording in current school mainly through manually recording and courseware recording and broadcasting system, these two kinds are recorded the feature of modes is that the video of multimachine position represents, record with on-the-spot circumstance, the content of recording uses as teaching resource through later stage compilation with after making.If but be just not suitable in the face of these two kinds of modes of making of micro-courseware, if only in order to micro-courseware development of a few minutes, employ so many manpower and materials and may some undertake to do what is apparently beyond one's ability under current school environment.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of micro-class recording system based on 3D dummy synthesis technology and method, and micro-class method for recording is simpler, and Production Time is shorter, and cost of manufacture is lower, and the content represented is abundanter.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of micro-class recording system based on 3D dummy synthesis technology, comprising:
For carrying out the video camera apparatus taking capture to personage;
For carrying out the audio frequency recording device of radio reception to personage;
Video for taking video camera apparatus carries out personage's acquisition processing module that personage scratches picture;
For the scene process module of generating virtual document scene;
For picture prospect and virtual scene file dummy synthesis will be scratched, realize the activity of personage in virtual scene and the image synthesis unit of change of video camera apparatus shooting;
For the activity of personage in virtual scene and change being carried out the video record control module of video record.
As improvement, system is also included in the document processing module of insert pictures or video in virtual background.
As improvement, system also comprises and obtaining the display translation signal of software, and vision signal correspondence is input to the system interface carrying out compound display in the display box of virtual scene with background and catches and grab module.
For solving the problems of the technologies described above, another technical scheme of the present invention is: a kind of micro-class method for recording based on 3D dummy synthesis technology, comprises the following steps:
(1) personage's acquisition processing module is utilized to carry out stingy picture to the personage of the video that video camera apparatus is taken;
(2) scene process CMOS macro cell virtual scene file is utilized;
(3) utilize image synthesis unit will scratch picture prospect and virtual scene file dummy synthesis, realize activity in virtual scene of personage that video camera apparatus takes and change;
(4) utilize video record control module that video record is carried out in the activity of personage in virtual scene and change.
As improvement, in step (1), personage scratches the mode resembled based on color samples and smooth optimization and realizes, and scratches image space formula to be: C=aF+ (1-a) B, and the stingy image space journey based on RGB tri-look is: Cr, g, b=aFr, g, b+ (1-a) Br, g, b; Wherein r, g, b tri-colour of look, adopt the colour of some pixels of the background colour of system Real-time Collection, background color adopts and R (255,0,0), G(0,255,0), B(0,0,255) color of close colour; Pixel outside this scope is as prospect, and corresponding Alpha channel value is set to 1, and as a setting, corresponding Alpha channel value is set to 0 to the pixel within this scope; Weighted average near the colour of smooth optimization employing target pixel points in certain limit, as the reference point of edge optimization.
As improvement, in step (2), the scene modeling file that designs is recompilated for the scene execute file that is suffix with .ASE or .XND in 3DMAX.
As improvement, utilize document processing module insert pictures or video in virtual background, comprising:
1) PPT load mode is: the document subject feature vector program utilizing system, converts the picture format of PNG, JPG, BMP to by PPT document format, display and control in virtual scene;
2) video load mode is: utilize the built-in player of system to carry out decoding to video and play, support that video format comprises avi, wmv, mp4, player controlling functions comprises broadcasting, time-out, loop play and F.F..
As improvement, utilize system interface to catch to grab the display translation signal of module to software and obtain, vision signal correspondence is input in the display box of virtual scene, carries out compound display with background.
As improvement, in step (4), the 3D three-dimensional video-frequency generation method under virtual background: after Video Composition, copy and generate another one image, form left and right overlay video to export, play by polarization type 3D television set, beholder watches by wearing polaroid glasses.
As improvement, in step (4), video record control module is utilized to produce compressed video and streaming media video.
The beneficial effect that the present invention is compared with prior art brought is:
The present invention utilizes dummy synthesis technology, by virtual for personage in any space, and can carry out activity in Virtual space, utilizes this technology can realize the teaching of academics and students under fixed-site counterdie draws up abundant scene and practice; For the recording of micro-course, image of the teacher that the virtual three-dimensional scene of computer manufacture and camera live are taken being taught carries out digitized real-time synthesis, and teacher and virtual dais are synchronously changed.The data such as PPT, video, picture of teacher's explanation can show in scene in the mode of picture-in-picture, and can explain the PPT of explanation and delineate, and explains and delineates the conversion of four kinds of color fonts, can classify and mark respectively.Teacher can insert webpage according to course demand, displaying web page content in a form of picture-in-picture simultaneously.Teacher needs to represent word document and Excel form, can insert equally, and content of operation can be recorded in the middle of curriculum video together.Carry out courseware recording under such a scenario, teacher can carry out good interaction with the course scene that will explain, and the courseware recorded out is lively, three-dimensional, interesting strong.
Accompanying drawing explanation
Fig. 1 is present system frame diagram.
Fig. 2 is three-dimensional scenic flow sheet.
Fig. 3 is the 3D three-dimensional video-frequency product process figure under virtual background.
Fig. 4 is the comprehensive fusion flow chart of multiple file format and virtual background.
Fig. 5 is HD video Real Time Compression and records flow chart.
Fig. 6 is that the Streaming Media of dummy synthesis video pushes flow chart.
Fig. 7 is video recording method flow graph of the present invention.
Embodiment
Below in conjunction with Figure of description, the invention will be further described.
Based on a micro-class recording system for 3D dummy synthesis technology, the scene of recording comprises scratches as blue case region, operation of teacher desktop and integral type recording arrangement.Video recording scene can be located in room, and operation of teacher desktop is relative with integral type recording arrangement, and during recorded video, teacher can see the virtual scene after dummy synthesis, contributes to teacher and drops in virtual scene and give lessons.
Hardware frame of the present invention comprises: video camera apparatus, audio frequency recording device, running software server, video display apparatus, audio output apparatus, the network equipment.
1) video camera apparatus: use shooting resolution at the high-definition camera of 1920 × 1080@25i, the vision signal way of output adopts HDMI or HD-SDI.
2) audio frequency recording device: use signal to noise ratio at the cable microphone of below 50DB or wireless microphone, audio output signal is 6.5 cun or 3.5 cun.
3) running software server: the recommended configuration of server configuration is, Z87 chipset mainboard, Intel i7-4790CPU, 8GBDDR31333MHZ internal memory, GTX960 chipset video card, 120SSD+2TBSATA hard disk, acquisition resolution gathers card machine in the high definition of 1920 × 1080 25i, video signal collective mode is HDMI or HD-SDI, and audio signal sample mode is RCA.
4) video display apparatus: resolution is display or the television set of 1920 × 1080@60P.
5) audio output apparatus: what directly export by software server comprises wired earphone, active audio amplifier, also outputs to power amplifier stereo set and monitoring headpone equipment by sound console.
6) network equipment: based on switch, router, the wireless aps of RJ45 interface and TCP/IP procotol.
Video camera carries out the capture of task video capture, exports collection of server card signal acquisition interface to by HDMI or HD-SDI of video camera; Capture card audio collection interface is exported to by 3.5 or 6.5 audio signals of microphone.
After the virtual background that character image and system generate synthesizes by server, audio signal exported to sound console equipment by sound card or directly export sound receiver device to; By high definition video card, dummy synthesis image is exported to display device; Subscriber terminal equipment is transferred to through the network equipment by TCP/IP procotol and MMS stream media protocol.
As shown in Figure 1, the micro-class of the present invention is recorded software systems and is comprised: personage's acquisition processing module, scene process module, image synthesis unit, video record control module, control virtual seat in the plane, document processing module, system interface catch and grab module.As shown in Figure 7, based on micro-class method for recording of 3D dummy synthesis technology, comprise the following steps:
(1) personage's acquisition processing module is utilized to carry out stingy picture to the personage of the video that video camera apparatus is taken;
(2) scene process CMOS macro cell virtual scene file is utilized;
(3) utilize image synthesis unit will scratch picture prospect and virtual scene file dummy synthesis, realize activity in virtual scene of personage that video camera apparatus takes and change;
(4) utilize video record control module that video record is carried out in the activity of personage in virtual scene and change;
(5) document processing module insert pictures or video in virtual background is utilized;
(6) utilize system interface to catch to grab the display translation signal of module to software and obtain, vision signal correspondence is input in the display box of virtual scene, carries out compound display with background.
In step (1), personage scratches the mode resembled based on color samples and smooth optimization and realizes, and scratches image space formula to be: C=aF+ (1-a) B, and the stingy image space journey based on RGB tri-look is: Cr, g, b=aFr, g, b+ (1-a) Br, g, b; Wherein r, g, b tri-colour of look, adopt the colour of some pixels of the background colour of system Real-time Collection, background color adopts and R (255,0,0), G(0,255,0), B(0,0,255) color of close colour; Pixel outside this scope is as prospect, and corresponding Alpha channel value is set to 1, and as a setting, corresponding Alpha channel value is set to 0 to the pixel within this scope; Weighted average near the colour of smooth optimization employing target pixel points in certain limit, as the reference point of edge optimization.
In the setting and optimization of the stingy picture a value based on color samples, adopt in the setting of stingy picture a value some pixels of the background colour of Real-time Collection colour and near the weighted average of certain limit pixel, in the operating process of reality, only need mouse to move to target background color range, click the mouse, system just can calculate a value, without the need to manually inputting colour.
In step (2), the scene modeling file that designs in 3DMAX is recompilated for the scene execute file that is suffix with .ASE or .XND, can only perform with the document scene after these two kinds of form compilings, not containing the scene modeling file that band is original, but the control of distance, rotation can be carried out scene in the mode at visual angle, similarly to control with the operation of video camera zoom and The Cloud Terrace.
In step (3), by the synthesis of stingy picture prospect and .ASE .XND file, the activity of the personage just achieving video camera shooting in Virtual Space and change.Utilize dummy synthesis technology, by virtual for personage in any space, and activity can be carried out in Virtual space, utilize this technology can realize the teaching of academics and students under fixed-site counterdie draws up abundant scene and practice.As shown in Figure 2, system introducing three-dimensional scenic is with .ASE .XND formatted file, and three-dimensional scenic is automatically read by xml configuration file and identifies three-dimensional scenic content.
In step (4), the video frequency output of recording has three kinds:
1) as shown in Figure 3,3D three-dimensional video-frequency generation technique under virtual background: implementation is that system after Video Composition, will copy and generate another one image, forms left and right overlay video and exports, play by polarization type 3D television set, beholder watches by wearing polaroid glasses.
2) as shown in Figure 5, HD video Real Time Compression and recording (comprise and suspend continuous recording function): the compress technique utilizing WMV and MP4 HD video, can adjust the recording compression parameter of HD video according to demand.System uses WMV and the MP4 video compression algorithm of standard, carries out compression preservation to the vision signal that system synthesis exports.The implementation suspending continuous record is, control button in recording and be divided into recording key, Pause key and stop key, when clicking Pause key, the video file of recording compression is temporarily kept in host memory and does not write hard disk, file relay when clicking recording button again in internal memory continues compressed cache, directly causes click and stops key Shi Caihui by whole file write hard disk generating video file.
3) as shown in Figure 6, utilize files in stream media generation technique, MMS stream media protocol and TCP/IP procotol is utilized by dummy synthesis video to transmit upon compression in real time, concrete grammar be in a browser key in: MMS: // host IP address, MMS stream media protocol can directly call windows carry mediaplay player carry out decoding broadcasting.Mobile terminal installs VLC streaming media playing software under based on IOS and Android operation system, all can obtain streaming media video file and carry out decoding to browse.
As shown in Figure 4, step (4) and (5) realize the comprehensive fusion of multiple file format and virtual background: utilize virtual background to the real-time seizure of multi-format document and synthetic technology, can show the file as numerous file formats such as PPT, WORD, EXCEL, PDF, photoshop, 3DMAX, picture, AfterEffects in the picture-in-picture screen space of virtual background.
1) PPT load mode is, utilizes the document subject feature vector program of system, converts PPT document format the picture formats such as to PNG, JPG, BMP, display and control in virtual scene.
2) video load mode is, utilize the built-in player of system to carry out decoding to video and play, support that video format comprises avi, wmv, mp4, player controlling functions comprises broadcasting, time-out, loop play and F.F..
3) Windows carries the load mode of software and third party's program (as: WORD, EXCEL, PDF, photoshop, 3DMAX, picture, AfterEffects etc.) and is: the capture function of system built-in computer desktop program display video, the display translation signal of software is obtained, vision signal correspondence is input in the display box of virtual scene, carries out compound display with background.
Claims (10)
1., based on a micro-class recording system for 3D dummy synthesis technology, it is characterized in that, comprising:
For carrying out the video camera apparatus taking capture to personage;
For carrying out the audio frequency recording device of radio reception to personage;
Video for taking video camera apparatus carries out personage's acquisition processing module that personage scratches picture;
For the scene process module of generating virtual document scene;
For picture prospect and virtual scene file dummy synthesis will be scratched, realize the activity of personage in virtual scene and the image synthesis unit of change of video camera apparatus shooting;
For the activity of personage in virtual scene and change being carried out the video record control module of video record.
2. a kind of micro-class recording system based on 3D dummy synthesis technology according to claim 1, is characterized in that: system is also included in the document processing module of insert pictures or video in virtual background.
3. a kind of micro-class recording system based on 3D dummy synthesis technology according to claim 1, it is characterized in that: system also comprises and obtaining the display translation signal of software, vision signal correspondence is input to the system interface carrying out compound display in the display box of virtual scene with background and catches and grab module.
4., based on a micro-class method for recording for 3D dummy synthesis technology, it is characterized in that, comprise the following steps:
(1) personage's acquisition processing module is utilized to carry out stingy picture to the personage of the video that video camera apparatus is taken;
(2) scene process CMOS macro cell virtual scene file is utilized;
(3) utilize image synthesis unit will scratch picture prospect and virtual scene file dummy synthesis, realize activity in virtual scene of personage that video camera apparatus takes and change;
(4) utilize video record control module that video record is carried out in the activity of personage in virtual scene and change.
5. a kind of micro-class method for recording based on 3D dummy synthesis technology according to claim 4, it is characterized in that: step (1) clicks based on mouse the Chroma Key algorithm obtaining numerical value: personage scratches the mode resembled based on color samples and smooth optimization and realizes, scratching image space formula is: C=aF+ (1-a) B, stingy image space journey based on RGB tri-look is: Cr, g, b=aFr, g, b+ (1-a) Br, g, b; Wherein r, g, b tri-colour of look, adopt the colour of some pixels of the background colour of system Real-time Collection, background color adopts and R (255,0,0), G(0,255,0), B(0,0,255) color of close colour; Pixel outside this scope is as prospect, and corresponding Alpha channel value is set to 1, and as a setting, corresponding Alpha channel value is set to 0 to the pixel within this scope; Weighted average near the colour of smooth optimization employing target pixel points in certain limit, as the reference point of edge optimization.
6. a kind of micro-class method for recording based on 3D dummy synthesis technology according to claim 4, is characterized in that: in step (2), the scene modeling file that designs is recompilated as the scene execute file that is suffix with .ASE or .XND in 3DMAX.
7. a kind of micro-class method for recording based on 3D dummy synthesis technology according to claim 4, is characterized in that: utilize document processing module insert pictures or video in virtual background, comprising:
1) PPT load mode is: the document subject feature vector program utilizing system, converts the picture format of PNG, JPG, BMP to by PPT document format, display and control in virtual scene;
2) video load mode is: utilize the built-in player of system to carry out decoding to video and play, support that video format comprises avi, wmv, mp4, player controlling functions comprises broadcasting, time-out, loop play and F.F..
8. a kind of micro-class method for recording based on 3D dummy synthesis technology according to claim 4, it is characterized in that: utilize system interface to catch to grab the display translation signal of module to software and obtain, vision signal correspondence is input in the display box of virtual scene, carries out compound display with background.
9. a kind of micro-class method for recording based on 3D dummy synthesis technology according to claim 4, it is characterized in that: in step (4), 3D three-dimensional video-frequency generation method under virtual background: after Video Composition, copy and generate another one image, form left and right overlay video to export, play by polarization type 3D television set, beholder watches by wearing polaroid glasses.
10. a kind of micro-class method for recording based on 3D dummy synthesis technology according to claim 4, is characterized in that: in step (4), utilizes video record control module to produce compressed video and streaming media video.
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