CN110418184A - A kind of image compensation method and processing terminal based on recorded video - Google Patents
A kind of image compensation method and processing terminal based on recorded video Download PDFInfo
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- CN110418184A CN110418184A CN201910596984.7A CN201910596984A CN110418184A CN 110418184 A CN110418184 A CN 110418184A CN 201910596984 A CN201910596984 A CN 201910596984A CN 110418184 A CN110418184 A CN 110418184A
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- 238000012545 processing Methods 0.000 title claims abstract description 9
- 230000009471 action Effects 0.000 claims abstract description 84
- 230000001360 synchronised effect Effects 0.000 claims abstract description 8
- 239000000284 extract Substances 0.000 claims abstract description 4
- 230000033001 locomotion Effects 0.000 claims description 25
- 230000008569 process Effects 0.000 claims description 22
- 238000012512 characterization method Methods 0.000 claims description 3
- 238000012163 sequencing technique Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
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- 230000002708 enhancing effect Effects 0.000 description 3
- 238000012549 training Methods 0.000 description 3
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- 238000003780 insertion Methods 0.000 description 2
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Classifications
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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
- H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
- H04N21/4312—Generation of visual interfaces for content selection or interaction; Content or additional data rendering involving specific graphical features, e.g. screen layout, special fonts or colors, blinking icons, highlights or animations
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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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- 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
- H04N21/47205—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 manipulating displayed content, e.g. interacting with MPEG-4 objects, editing locally
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Abstract
The present invention relates to a kind of image compensation method and processing terminal based on recorded video, the compensation method includes the following steps: step 1: after obtaining recording start signal, acquisition starts to draw action signal, and drafting action data is recorded, action data will be drawn and the recorded file is written in relative time data；Step 2: playing the recorded file, dynamically the corresponding graphing of each drafting action data is played on broadcast interface successively and is shown, it is synchronous on broadcast interface to generate layer of transparent drawing layer, it extracts each end for drawing action data and draws the time, reach the end drafting time when playing relative time, new graphing is then generated according to corresponding drafting action data on the transparent drawing layer, the graphing is shown on transparent drawing layer.The present invention effectively can completely restore graphing when recording, and realize the clear display of graphing.
Description
Technical field
The present invention relates to record screens and figure to enhance technical field, specifically a kind of image compensation method based on recorded video
And processing terminal.
Background technique
Recorded video is uploaded to server after usually will do it compression or is sent directly to destination client at present, in target
Compressed recorded video is played out in client, causes the image played in recorded video to thicken, loses original
Clarity.For certain recorded videos, such may compress will not influence result of broadcast, and the record under corresponding certain scenes
Video playing processed can but affect.For example, the record screen of certain teaching, trainings for needing to demonstrate etc., often carries out on the screen
Drawing explained with emphasis, for drafting various figures through overcompression transmission play again after, often graphical display is unintelligible, no
Meet the demand of the application scenarios of teaching, training etc..If recorded video not being compressed and directly being transmitted, can occupy larger
Internet resources and memory space, be not a good solution.Therefore, it is necessary to figure in a kind of pair of recorded video into
The method of row enhancing compensation, is shown with solving the problems, such as in recorded video that intermediate portions cannot be played clearly.
Summary of the invention
In view of the deficiencies of the prior art, an object of the present invention provides a kind of graph compensation side based on recorded video
Method is able to solve graphical display unsharp problem when recorded video plays；
The second object of the present invention provides a kind of processing terminal, and it is unclear to be able to solve graphical display when recorded video plays
Clear problem.
The technical solution one of achieved the object of the present invention are as follows: a kind of image compensation method based on recorded video, including
Following steps:
Step 1: after obtaining recording start signal, acquisition starts to draw action signal, and records drafting action data, will draw
Recorded file is written in action data and relative time data processed, and the drafting action data characterization, which obtains, to be started to draw action signal
Afterwards, the movement of graphing is carried out on drawing carrier, drawing action data and including at least terminates to draw time, drafting movement just
The coordinate of beginning position, drafting act the coordinate of end position and draw from starting to draw to each of pilot process for terminating to draw
The coordinate of point is made, the drafting carrier is electronic whiteboard,
The end time for terminating to draw each movement of time representation and the time for obtaining recording start signal
Relative time difference；
Step 2: playing the recorded file, successively dynamically broadcasting the corresponding graphing of each drafting action data
It puts to play on interface and show,
While starting broadcasting, synchronous on broadcast interface to generate layer of transparent drawing layer, the transparent drawing layer is
Refer to that background is the figure layer of clear, colorless,
According to the time sequencing for drawing action data write-in recorded file, each drafting being successively read in recorded file is dynamic
Make data, and extract each end for drawing action data and draw the time, reaches the end drafting time when playing relative time, then
New graphing is generated according to corresponding drafting action data on the transparent drawing layer, the graphing is drawn transparent
It is shown in figure layer,
It generates each and draws the corresponding new graphing of action data, and in the corresponding knot of each drafting action data
The beam drafting time shows on transparent drawing layer.
Further, the transparent drawing layer is Bitmap.
Further, the electronic whiteboard refers to the picture or blank page of operation on an electronic device.
It further, further include terminating to draw the time in the step 2, the drafting movement of synchronous erasing broadcast interface
Data.
Further, end position is acted according to the coordinate for the drafting movement initial position drawn in action data, drafting
Coordinate and from the coordinate for starting to draw each graphical pointv to the pilot process for terminating to draw, it is corresponding on transparent drawing layer
Position generate the graphing and show.
Further, according to the ratio of the window size of broadcast interface and the image size of recorded file, in transparent drawing
Layer generates the graphing for adapting to the window size of broadcast interface.
A kind of two technical solution achieved the object of the present invention are as follows: processing terminal comprising,
Memory, for storing program instruction；
Processor, for running described program instruction, to execute the step of the image compensation method based on recorded video
Suddenly.
The invention has the benefit that the present invention effectively can completely restore graphing when recording, and
When playing recorded file, corresponding time showing is come out, realization lead to that graphical display is unintelligible due to compression and to drafting figure
Shape compensation, to realize the clear display of graphing.
Detailed description of the invention
Fig. 1 is flow diagram of the invention；
Fig. 2 is the schematic diagram that audio data block and drafting action data are assembled into a recorded file；
Fig. 3 is the schematic diagram for showing graphing when playing recorded file on transparent drawing layer；
Fig. 4 is a kind of structural schematic diagram of processing terminal of the present invention.
Specific embodiment
In the following, being described further in conjunction with attached drawing and specific embodiment to the present invention:
As shown in Figures 1 to 3, a kind of image compensation method based on recorded video, includes the following steps:
Step 1: after obtaining recording start signal, acquisition starts to draw action signal, and records drafting movement initial position
Coordinate and start initial time when drawing, the initial time characterization of drafting movement is from the recording start signal is obtained to opening
Begin the relative time drawn, and follow-up play recorded file needs are used；Obtaining terminates to draw action signal, and records drafting movement
The coordinate of end position and terminate end time when drawing, and if record terminate to draw pilot process from starting to be plotted to
Dry graphical pointv coordinate and each coordinate corresponding time, to obtain the corresponding drafting action data of each graphing.
End time when terminating drafting needs to use in subsequent graph compensation, is thus denoted as end time when terminating drafting
Terminate to draw the time.
It should be noted that starting to draw action signal and terminating to draw action signal here each means and currently draws
Begin to draw action signal and terminate to draw action signal, in a recording process, it will usually it is acted including multiple draftings, it is each
A drafting movement can generate corresponding drafting action data.
Preferably, it records and is answered from all graphical pointv coordinates and each coordinate pair for starting to be plotted to end drafting pilot process
Time.
One drafting action data includes persistently drawing the time, starting to draw the time, terminate to draw time, drafting movement just
The coordinate of beginning position, drafting act the coordinate of end position and draw each of pilot process from starting to draw to terminate to draw
The coordinate of a graphical pointv and each coordinate corresponding time also included from the duration for starting to be plotted to end drafting.It opens
Begin to draw action signal to be usually the signal that user just starts drafting operation generation, such as on the touch screen of mobile terminal, hand
Finger, which slides, draws various figures, and finger just starts to contact or press the signal that touch screen generates to be to start to draw action signal.
It is corresponding, terminate to draw action signal to be generally also the signal that user just terminates that drafting operation generates, such as in mobile terminal
On touch screen, finger, which slides, draws various figures, and finger is detached from the signal generated when touch screen or touch screen does not receive touch
Signal is to generate to terminate to draw action signal.It can certainly be that electronic pen generation starts to draw action signal and terminates to draw
Action signal.
Wherein, drafting movement generates corresponding graphing, such as draws a curve or straight line or any other
The figure of shape.The coordinate and initial time for recording drafting movement initial position, refer to obtain a curve or straight line or other
The coordinate of each point and End of Curve coordinate and each coordinate points corresponding time, that is, obtain on the origin coordinates of figure, curve
Draw each coordinate points corresponding time.Drafting movement is carried out on drawing carrier, and drawing carrier is preferably electronic whiteboard,
Electronic whiteboard is referring to the picture or blank page of operation on an electronic device.
Preferably, it records from the coordinate and each coordinate pair for starting to be plotted to all graphical pointvs for terminating to draw pilot process
The time answered.Such as when recording the coordinate and corresponding 10 coordinates of 10 graphical pointvs of a curved intermediate part point for drafting
Between.
Recorded file is written to the drafting action data of acquisition, to generate recorded file.Certain recorded file can be with
Including the audio data of recording or other data recordings, such as the recording of insertion document, can also be shown when playing recorded file
The content and playing audio-fequency data being inserted into document.The recording of recording audio data and insertion document is not that the application needs to protect
Shield, i will not repeat them here.That is, recorded file, which includes at least, draws action data.
Preferably, one drafting action data of every acquisition will then draw action data and corresponding label information group immediately
TLV structured data block is dressed up, label information, which contains corresponding draw time, coordinate of graphical pointv etc. for drawing action data, to be believed
Breath, and recorded file is written into TLV structured data block immediately.The drafting action data of each TLV structure sequentially in time according to
Secondary write-in recorded file.
Preferably, after obtaining the recorded file, further include the recorded file is encrypted and is compressed so that
Recorded file the space occupied is smaller, more adapts to the demand for uploading, downloading and sharing, reduces the network resource consumption of user.
Further illustrate that the process of action data is drawn in the acquisition in step 1 below with reference to Fig. 2:
User selects tool, color, pixel of graphing etc., then exists on drawing carrier (such as electronic whiteboard)
It draws and draws circular motion on carrier.Drawing circular motion can be at the end PC through mouse completion, be also possible to mobile whole
It carries out, is not especially limited on the touch screen at end.Pass through finger for mobile terminal draws curve by user, user is originating
Position is to click on (x0, y0), is to unclamp finger on (x5, y5) in end position, and application program can receive touch event, thus
It receives and starts to draw action signal and terminate to draw action signal, and the coordinate and correspondence of record start position and end position
Time.Such as the 2s after starting to record starts to click, then initial position (x0, y0) corresponding time is 2s, in 7s
Finger is unclamped, then end position (x5, y5) the corresponding time is 7s.Simultaneously during drawing this curve, also drawn
The coordinate of 4 graphical pointvs of pilot process and corresponding time, the coordinates of 4 graphical pointvs be respectively (x1, y1), (x2, y2),
(x3, y3) and (x4, y4).Certainly, here only it is exemplary obtain pilot process 4 graphical pointvs coordinate, can actually
Obtain more graphical pointvs coordinate and the corresponding time.
When with json agreement to record touch event, the json data after movement conversion are as follows:
The concrete meaning of the json data are as follows: type indicates that type of action, curve indicate trace movement, and id is figure
The identification number of shape needs to be added this identification number, draw is if subsequent carry out this figure the operation such as to move, delete
The design parameter of graphing, stroke indicate the parameters such as paintbrush, including some colors, and alpha is the parameter of the transparency of line,
R, g, b are RGB color, and pixel is the pixel-parameters of line rugosity, and x0, y0 are the coordinate value of curve initial position, and x5, y5 are song
The coordinate value in line final position, x1, y1-x4, y4 be curve among graphical pointv coordinate value, time be movement generation when
Between, namely from starting to record meter, the initial time of curve is drawn, page is the page that carrier is drawn transmitted by operation of recording
The page number.
Step 2: obtaining the recorded file and play out, recorded file, which includes at least, draws action data, therefore draws
Action data processed can play back on broadcast interface namely the process of graphing can be played out.Wherein, it reads and draws
Action data starts to draw the time, and works as and reach drafting action data to currently playing time difference from starting to play meter
Start draw the time, then start dynamically to show graphing on broadcast interface, until when from start play meter to
Currently playing time difference reaches the end time for drawing action data, then the corresponding graphing for drawing action data is complete
It plays back entirely.
It is synchronous on broadcast interface to generate layer of transparent drawing layer, the size of transparent drawing layer while starting broadcasting
Identical as the size of broadcast interface, the transparent drawing layer refers to that background is the figure layer of clear, colorless, and can be in the figure layer
It draws various figures and shows, such as straight line or curve or circle etc..
Preferably, transparent drawing layer is Bitmap.
According to the time sequencing for drawing action data write-in recorded file, each drafting being successively read in recorded file is dynamic
Make data, that is, the drafting action data that recorded file is first written first is read out, the rear drafting that recorded file is written acts number
It is read out according to later.And extract each end for drawing action data and draw the time, when from starting to play meter to current
The time difference of broadcasting reaches the end drafting time for drawing action data, to the currently playing time difference from starting to play meter
Value is denoted as broadcasting relative time, namely reaches the end drafting time when playing relative time, then the root on the transparent drawing layer
New graphing is generated according to corresponding drafting action data, the graphing is shown on transparent drawing layer.Successively
It goes on, namely after having read first drafting action data and having regenerated new graphing, continues to read next
It draws action data and generates corresponding new graphing, so that generating each draws the corresponding new drafting of action data
Figure is simultaneously shown.For example, during terminating to draw the time is 5s, namely action data is drawn in recording in step 1, from
Start recording to have counted to the time difference for having drawn current Graphics to be 5s.Correspondingly, the 5s from starting to play meter, then saturating
Corresponding graphing is generated on bright drawing layer and is shown.It successively goes on, all draw is generated on transparent drawing layer
The corresponding graphing of action data processed is simultaneously drawn time showing in corresponding end and is come out.
Preferably, while generating new graphing, the synchronous drafting action data by broadcast interface is deleted, and also will
The drafting action data for being sent to broadcast interface is wiped out.Since the drafting action data of broadcast interface is deleted, boundary is played
Face is no longer shown when terminating to draw the time draws the corresponding graphing of action data, that is, the graphing of broadcast interface
It disappears, is not shown when terminating and drawing the time since the drafting action data of broadcast interface is deleted.
Namely, it is preferable that on Bitmap object, according to the seat for the drafting movement initial position drawn in action data
Mark, drafting act the coordinate of end position and the coordinate of each graphical pointv and when terminating to draw the time, in transparent drawing layer
Corresponding new graphing is generated on upper corresponding position and is shown.Corresponding position refers to each of new graphing
A graphical pointv and initial position, end position are being recorded screen or are being broadcast in the coordinate of transparent drawing layer with original graphing
The coordinate put on interface is identical.
By generating new corresponding graphing in the display of transparent drawing layer, so that even if the graphing of broadcast interface
It is thickened due to compression, still can clearly indicate out by the graphing of transparent drawing layer, realize that figure increases
The purpose compensated by force.
Only graphing is regenerated and shown, all the elements of recorded file are not given birth to again
At achieving the purpose that supplement.This meets practical application, because under normal conditions, recorded video is more for the ease of religion
The application in the sharing such as, training field, and often important content part, are expressed generally by graphing, therefore to pass
What key section enhance compensated recorded video plays full up sufficient actual demand.For example, the recording of a classroom instruction
Video, teacher carry out teaching explanation on an electronic device, and record teacher (such as electronics is white in the drafting carrier of electronic equipment
Plate) on graphing, while speech sound eeplaining.Teaching process is recorded to obtain recorded video to include the audio data recorded
With drafting action data, draws action data and characterize graphing of the teacher on electronic whiteboard.
When playing the recorded video, it is only necessary to graphing is regenerated and clearly indicates out, i.e., it is reachable
To the purpose of figure enhancing compensation.Graphing often represents in pith perhaps key content, it is only necessary to graphing energy
It enough clearly indicates out, does not need to compensate audio data or other data recordings, although recorded video
Have compression, the image of broadcast interface caused to thicken, but graphing supplement so that recorded video fully meet it is daily
Demand.
If the window size of broadcast interface and the image size of recorded file be not identical, big according to the window of broadcast interface
The small ratio with the image size of recorded file, the drafting for adapting to the window size of broadcast interface is generated in transparent drawing layer
Figure.For example, the image size of recorded file is 480p, the window of broadcast interface is 1080p, then needs to draw in transparent drawing layer
System can adapt in the broadcast interface that window is 1080p, so as to clearly indicate graphing.
Further illustrating in step 2 below with reference to Fig. 3 is terminating to draw the time, broadcast interface do not show graphing and
The process of graphing is shown on transparent drawing layer:
To current play time to play relative time from starting to play meter, drawn when broadcasting relative time reaches end
Time t, end drafting time t is exactly graphing a at the time of broadcast interface is completed to play namely graphing a is complete
Complete play shows.Terminating to draw time t, according to action data is drawn, corresponding drafting is generated on transparent drawing layer
Figure b, graphing b are identical with the size of graphing a, shape.Position of the graphing b on transparent drawing layer with
Graphing a in the position of broadcast interface be it is identical, also with graphing a to record the position on screen identical, i.e., with record
Position of the graphing a on recording screen in system drafting action process is identical, initial position, knot including graphing a
Beam position is identical with the coordinate of each graphical pointv.And since transparent drawing layer is arranged on broadcast interface, even if
The graphing a of broadcast interface is obscured due to compression, but the graphing b on transparent drawing layer is still clearly shown simultaneously
The graphing a on broadcast interface is completely covered, therefore, plays the role of the enhancing compensation to graphing, user's viewing
Graphing a in recorded video is still clearly.
Preferably, simultaneously as the synchronous drafting action data by broadcast interface is deleted terminating to draw time t, because
This broadcast interface can't show graphing a.Corresponding, graphing a is indicated in broadcast interface with pecked line, is indicated
Terminate to draw time t, broadcast interface does not show graphing a.
If during should be noted that recorded video, wiped after certain curve b is depicted in some drawing process again
Curve b, the recorded file of generation recorded the process of formation curve b and the process of erasing curve b, and erasing curve b is considered as
It is to draw the figure of no color and cover original image shape.But in step 2, transparent drawing layer does not need that the mistake of curve b will be wiped
Journey is regenerated and is shown, it is only necessary to by draw curve b process regenerate can and on transparent drawing layer always
It has been shown that, because this will not influence viewing recorded video.
It is of course also possible to show the process of erasing curve b on transparent drawing layer, namely terminating to draw time generation song
Line b simultaneously shows the time, some subsequent (end time of erasing is completed when the time is recording) time generate one with
The figure and covering curve b of identical no color are wiped, so that curve b is wiped in display.Detailed process, it is no longer superfluous herein
It states.
As shown in figure 4, the invention further relates to a kind of processing terminals 100 of entity apparatus for realizing above method comprising,
Memory 101, for storing program instruction；
Processor 102, for running described program instruction, to execute in the image compensation method based on recorded video
The step of.
Embodiment disclosed in this specification is an illustration to folk prescription region feature of the present invention, protection model of the invention
Embodiment without being limited thereto is enclosed, the equivalent embodiment of other any functions is fallen within the protection scope of the present invention.For this field
Technical staff for, various other corresponding changes and change can be made according to the above description of the technical scheme and ideas
Shape, and all these change and deformation all should belong within the scope of protection of the claims of the present invention.
Claims (7)
1. a kind of image compensation method based on recorded video, which comprises the steps of:
Step 1: after obtaining recording start signal, acquisition starts to draw action signal, and records drafting action data, dynamic by drawing
Make data and relative time data write-in recorded file, the drafting action data characterization acquisition starts after drawing action signal,
The movement of graphing is carried out on drawing carrier, drafting action data, which includes at least, terminates to draw time, drafting movement initially
The coordinate of position, the coordinate of drafting movement end position and each drafting from the pilot process for starting to draw to end drafting
The coordinate of point, the drafting carrier are electronic whiteboard,
The phase for terminating to draw the end time and the time for obtaining recording start signal of each movement of time representation
To time difference；
Step 2: playing the recorded file, the corresponding graphing of each drafting action data is dynamically successively being played into boundary
It plays and shows on face,
While starting broadcasting, synchronous on broadcast interface to generate layer of transparent drawing layer, the transparent drawing layer refers to back
Scape is the figure layer of clear, colorless,
According to the time sequencing for drawing action data write-in recorded file, each drafting being successively read in recorded file acts number
According to, and extract each end for drawing action data and draw the time, reach the end drafting time when playing relative time, then in institute
It states and new graphing is generated according to corresponding drafting action data on transparent drawing layer, the graphing is in transparent drawing layer
Upper display,
It generates each and draws the corresponding new graphing of action data, and drawn in the corresponding end of each drafting action data
Time processed shows on transparent drawing layer.
2. the image compensation method according to claim 1 based on recorded video, which is characterized in that the transparent drawing layer
For Bitmap.
3. the image compensation method according to claim 1 based on recorded video, which is characterized in that the electronic whiteboard is
Refer to the picture or blank page of operation on an electronic device.
4. the image compensation method according to claim 1 based on recorded video, which is characterized in that in the step 2, also
It is included in end to draw the time, the drafting action data of synchronous erasing broadcast interface.
5. the image compensation method according to claim 1 based on recorded video, which is characterized in that act number according to drafting
It the coordinate of drafting movement initial position in, the coordinate of drafting movement end position and is drawn from starting to draw to terminating
The coordinate of each graphical pointv of pilot process, corresponding position generates the graphing and shows on transparent drawing layer.
6. the image compensation method according to claim 1 based on recorded video, which is characterized in that according to broadcast interface
The ratio of the image size of window size and recorded file generates the institute for adapting to the window size of broadcast interface in transparent drawing layer
State graphing.
7. a kind of processing terminal comprising,
Memory, for storing program instruction；
Processor, it is as claimed in any one of claims 1 to 6 based on recorded video to execute for running described program instruction
The step of image compensation method.
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| CN114143480A (en) * | 2021-12-10 | 2022-03-04 | 北京百度网讯科技有限公司 | Chart video generation method, device, equipment, storage medium and program |
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