CN101083751B - Video teaching method and apparatus - Google Patents
Video teaching method and apparatus Download PDFInfo
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- CN101083751B CN101083751B CN2007101230509A CN200710123050A CN101083751B CN 101083751 B CN101083751 B CN 101083751B CN 2007101230509 A CN2007101230509 A CN 2007101230509A CN 200710123050 A CN200710123050 A CN 200710123050A CN 101083751 B CN101083751 B CN 101083751B
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Abstract
This method includes steps of: (1) verifying whether receiving the demo instruction; (2) if it does, initialing the screen catching frequency (SCF) and catching the screen picture according to SCF and sending it out; (3) after sending, judging whether receiving the stop demo instruction; (4) if it does not, continuing to catch and send out the screen picture; (5) if it does, then closing the flow. This invention also discloses a video didactical device. It consists of the verifying unit, the screen catching unit and the judging unit. Using screen catching and video transferring of this invention, user can sends to other users clearly pictures of own operations. The method offered by this invention can be applied in the instant comm. tool (ICT). Then ICT user can conveniently directly show to other users the process that he operates ICT. This raises the satisfaction of ICT users.
Description
Technical field
The present invention relates to internet arena, relate in particular to a kind of video teaching method and device.
Background technology
Along with developing rapidly of internet, increasing people have realized the convenience of network, and also furthered people's life distance of internet.People exchange by the internet even impart knowledge to students by the internet.This remote teaching of being undertaken by the internet broken traditional teaching mode in the space, distance, temporal constraint, receive more and more people's welcome.
Present remote teaching method can be passed through the video transmitting function, both catches instructor's demonstration picture, sound by voice capture device transmission instructor by camera.But this method needs the instructor to have the hardware device camera, when camera is caught picture, especially it is cumbersome to operate when needing the screen-picture of seizure display, and picture size and definition all can be received the influence of camera hardware, thereby can have influence on teaching efficiency.
Some the time, when some user needs instructor's help, such as the operation demonstration that needs the instructor, the instructor also can pass through the remote assistance function, user's operation power can be shared to the instructor by network by this function, the instructor can demonstrate by operation user's machine like this.But the authority of opening this remote assistance is very complicated, and data quantity transmitted is more, has caused the waste of the network bandwidth.
Summary of the invention
For definition, teaching efficiency and the remote assistance mode complicated operation that solves above-mentioned long-distance video teaching, the problem of the waste network bandwidth, the embodiment of the invention solves by following proposal:
Whether monitoring receives presentation command, if receive then initialization screen capture frequency; According to initialization screen capture frequency acquisition screen-picture and transmission; After transmission, judge whether to receive the interruption presentation command, then continue if not to catch screen-picture and send; If process ends then.
Wherein, after receiving presentation command, continue monitoring and whether receive the track following order, click order if then after catching screen-picture and transmission, further judge whether to receive operation according to the track following order, if recording occurring continuously clicking point coordinate position then, draw the lines that have direction indication between continuous two clicking point, perhaps preset the opacity of each clicking point, will " in the middle of current clicking point and the clicking point before a bit and the distance of current clicking point " and the merchant of " current clicking point with clicking point distance " before, multiply by " current clicking point opacity is poor with clicking point opacity before ", the opacity that described product is added current clicking point is to draw the lines that opacity is successively decreased or increased progressively between continuous two clicking point; Be added to the lines of drawing on the screen capture picture that obtains and send; If not receiving the track following order does not receive yet and interrupts presentation command and then continue to catch screen-picture.
Wherein, the screen capture frequency is also can being provided with by user oneself of setting in advance.
Wherein, preset the described opacity that has the lines of direction indication.
Corresponding to said method, the present invention also provides a kind of device of video teaching, and this device comprises:
Monitoring means, whether monitoring receives presentation command;
The screen capture unit is when monitoring means monitors when receiving presentation command initialization screen capture frequency; According to initialization screen capture frequency acquisition screen-picture and transmission;
Judging unit is used for judging whether to receive the interruption presentation command after the screen capture unit sends screen-picture, and then the notification screen capture unit continues to catch screen-picture and sends if not; Monitoring means stops to monitor, the screen capture unit stops to catch screen-picture if then notify.
Wherein, this device also comprises:
Monitoring means also is used for monitoring and whether receives the track following order;
Judging unit also is used for judging receiving the track following order at monitoring means, and behind the screen capture unit seizure screen-picture, judges whether to receive operation and click order; Do not receive then notification screen capture unit continuation seizure screen-picture of interruption presentation command if receive the track following order yet;
The track unit, be used for after judgment unit judges receives operation click order, if the point coordinates position clicked continuously in record, draw the lines that have direction indication between continuous two clicking point, perhaps preset the opacity of each clicking point, will " in the middle of current clicking point and the clicking point before a bit and the distance of current clicking point " and the merchant of " current clicking point with clicking point distance " before, multiply by " current clicking point opacity is poor with clicking point opacity before ", the opacity that described product is added current clicking point is to draw the lines that opacity is successively decreased or increased progressively between continuous two clicking point, the screen capture picture that the lines of drawing are added to and obtain, and described screen capture picture notification screen capture unit sent;
The screen capture unit also is used for the screen capture picture transmission with trajectory diagram that the receiving locus unit forms.
Wherein, described track unit specifically comprises:
Record cell is used to write down continuous click point coordinates position, obtains the screen capture picture;
First computing unit is used for calculating the merchant of " in the middle of current clicking point and the clicking point before a bit with the distance of current clicking point " and " current clicking point with clicking point distance " before;
Second computing unit is used for the merchant that first computing unit calculates be multiply by the poor of current clicking point opacity and clicking point opacity before;
The 3rd computing unit is used for the difference that second computing unit calculates is added the opacity of current clicking point;
Superpositing unit, the final value that the 3rd computing unit the is calculated screen capture picture that record cell obtains that is added to, and send to the screen capture unit.According to the embodiment of the invention, can transmit by screen capture and video the user is clearly sent to other users at the picture of in-local.And need clearly indicate the user in the operation trace of this machine when working as some, can be by the continuous click track of record, and be depicted as trajectory diagram and upgrade the screen capture picture obtain and send to the user, the user not only can see the whole operation process like this, and can see the trajectory diagram of click intuitively.And the method that the embodiment of the invention provides can be applied in the immediate communication tool, and the immediate communication tool user can directly demonstrate the process of its operation immediate communication tool easily to other users so, has improved immediate communication tool user's satisfaction.
Description of drawings
Fig. 1 is the embodiment of the invention one flow chart;
Fig. 2 is the embodiment of the invention two flow charts;
Fig. 3 clicks the track schematic diagram for the embodiment of the invention;
Fig. 4 is the embodiment of the invention three installation drawings;
Fig. 5 is the embodiment of the invention four installation drawings.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
Embodiment one, and referring to Fig. 1, the embodiment of the invention provides a kind of video teaching method:
Step 101: whether monitoring receives presentation command;
Step 102: if receive then initialization screen capture frequency;
The described initialization screen capture of this step frequency can be a frequency that sets in advance, and also can be that user oneself selects a frequency to set when carrying out this step; This frequency generally can be set at 10 frame per seconds.
Step 103: according to initialization screen capture frequency acquisition screen-picture and transmission;
The screen-picture of the said seizure of this step is the dynamic process that user's operational computations machine display screen shows.Motion capture screen described herein is just: according to certain frequency (such as 0.2 second once) active screen is duplicated and preserves, these pictures have just formed the process of screen dynamic change according to sequencing then.After duplicating and preserve the screen dynamic changing process, again it is sent this screen dynamic changing process by the video tranmission techniques.
Step 104: after transmission, judge whether to receive the interruption presentation command, if execution in step 105 then; Execution in step 103 then if not;
Step 105: process ends.
This method can be applied in the immediate communication tool field, when instant communication tool user triggers presentation command, just begins initialization screen capture frequency, will capture user's operating process and send to other designated users.Other users play the video information of this screen dynamic changing process by the existing video transmission of immediate communication tool, reception, playing function behind the screen dynamic changing process that receives this user's transmission; The process of seizure, transmission, reception and broadcast by a kind of like this screen dynamic changing process, the process of watching other users' operations that the user just can be real-time like this.
Embodiment 2, and in order more clearly to express the movement locus of mouse in the dynamic process that user's operational computations machine display screen shows, the present invention also provides a kind of video teaching method on the basis of embodiment 1, referring to Fig. 2:
Step 201: whether monitoring receives presentation command;
Step 202: then continue to monitor whether receive the track following order if receive presentation command;
Step 203: initialization screen capture frequency;
Step 204: according to initialization screen capture frequency acquisition screen-picture;
The screen-picture of the said seizure of this step is the dynamic process that user's operational computations machine display screen shows.Motion capture screen described herein is just: according to certain frequency (such as 0.2 second once) active screen is duplicated and preserves, these pictures have just formed the process of screen dynamic change according to sequencing then.
Step 205: the screen-picture that captures is sent;
Step 206: judge the command type that receives; If interrupt presentation command execution in step 207; If in step 202, receive the track following order and in this step, receive the operation click and order then execution in step 208; If in step 202, receive the other types order, just do not receive not receive in track following order, this step to operate to click to order not receive yet and interrupt then execution in step 204 of presentation command;
Step 207: process ends;
Step 208: recording occurring continuously clicking point coordinate position, draw the movement locus figure (size of this trajectory diagram with the screen-picture that captures size consistent) of continuous clicking point, the trajectory diagram of drafting is added on the screen capture picture that obtains execution in step 205.
The method of the movement locus of the continuous clicking point of the described drafting of this step can be for drawing the lines that opacity is successively decreased or increased progressively between continuous two clicking point; Perhaps can have the lines of direction indication, and can preset the described opacity that has the lines of direction indication for drawing between continuous two clicking point.
Draw that opacity between continuous two clicking point is successively decreased or the concrete step of lines that increases progressively can illustrate by an object lesson:
After receiving operation click order, after also can be described as the click event that receives left mouse button, then note click location, circle of this position on screen capture picture stack (definition A) then, continue monitoring and whether receive operation click order, the just click event of left mouse button;
If receive this incident again, note click location equally, circle of this position stack (definition B) on the screen capture picture then, and circle B and a last circle A coupled together, forms a connecting line (definition BA), the continuation monitoring;
If receive this incident once more, note click location equally, circle of this position on screen capture picture stack (definition C) then, and a circle C and a last circle B coupled together, form another connecting line (definition CB), this moment, the opacity of circle A was set to 80%, and then the last connecting line BA of this formula is set to by B opaque to the gradual change of A below using.
Wherein, establish the P point on the BA connecting line more arbitrarily, O
PBe the opacity value that P is ordered, and (x
A, y
A), (x
B, y
B) and (x
P, y
P) then be respectively A, the screen position coordinate that B and P are ordered.Especially, when P point during in B point position, O
P=100%, when P point during in the A position, O
P=80%
Because opacity is gradual change, the P point is near more from the A point in other words, and its opacity is just more near A point opacity value, and is near more from the B point, the opacity value that its opacity is just ordered near B more.In the formula 80% represented A point transparent value, (100%-80%) the transparent value difference of representing B point and A to order, and the distance that on behalf of P point and A, the molecule of fraction order, the record that on behalf of A point and B, denominator order.
According to method recited above by that analogy, the opacity of each clicking point is successively decreased with 20%; When listening to five left mouse button click event altogether, one has five circles, schematic diagram referring to Fig. 3, to being E, D, C, B and A far respectively, their opacity is respectively 100%, 100% by near, 80%, 60%, 40%, and the opacity of each point of connecting line uses following formula to calculate:
When the P point is on ED,
O
P＝100％
When the P point is on DC,
When the P point is on CB,
When the P point is on BA,
When using opacity to represent the mouse movement track, the number of times of the several left mouse button click event of put in advance, for example when the left mouse button click event number of times that monitors surpasses 5 times, only keeping nearest five times data, is exactly only to draw last five times mouse movement track.
Embodiment three, and in order to realize the method for the foregoing description 1, the embodiment of the invention provides a kind of device of video teaching, and referring to Fig. 4, this device comprises:
Monitoring means 401, whether monitoring receives presentation command;
Judging unit 403 is used for judging whether to receive the interruption presentation command after the screen capture unit sends screen-picture, and then the notification screen capture unit continues to catch screen-picture and sends if not; Monitoring means stops to monitor, the screen capture unit stops to catch screen-picture if then notify.
Embodiment four, and in order to realize the method for the foregoing description 2, the embodiment of the invention also provides a kind of device of video teaching, and referring to Fig. 5, this device comprises:
Monitoring means 501, whether monitoring receives presentation command; Also be used for monitoring and whether receive the track following order;
Judging unit 502 is used for judging whether to receive the interruption presentation command after the screen capture unit sends screen-picture, and then the notification screen capture unit continues to catch screen-picture and sends if not; Monitoring means stops to monitor, the screen capture unit stops to catch screen-picture if then notify; Also be used for judging receiving the track following order, and behind the screen capture unit seizure screen-picture, judge whether to receive operation and click order at monitoring means; Do not receive then notification screen capture unit continuation seizure screen-picture of interruption presentation command if receive the track following order yet;
Described track unit 503 specifically comprises:
First computing unit 5032 is used to calculate in the middle of current clicking point and the clicking point before a bit and the distance of current clicking point and current clicking point and the merchant of clicking point distance before;
Second computing unit 5033, clicking point opacity and clicking point opacity before is poor before being used for the merchant that first computing unit calculates be multiply by;
The 3rd computing unit 5034 is used for the difference that second computing unit calculates is added the opacity of current clicking point;
In sum, can the user clearly be sent to other users at the picture of in-local by screen capture and video transmission by the embodiment of the invention.And need clearly indicate the user in the operation trace of this machine when working as some, can be by the continuous click track of record, and be depicted as trajectory diagram and upgrade the screen capture picture obtain and send to the user, the user not only can see the whole operation process like this, and can see the trajectory diagram of click intuitively.And the method that the embodiment of the invention provides can be applied in the immediate communication tool, and the immediate communication tool user can directly demonstrate the process of its operation immediate communication tool easily to other users so, has improved immediate communication tool user's satisfaction.
The explanation of above embodiment just is used for helping to understand method of the present invention and thought thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, part in specific embodiments and applications all can change.In sum, this description should not be construed as limitation of the present invention.
Claims (4)
1. a video teaching method is characterized in that, this method comprises:
Whether monitoring receives presentation command, if receive then initialization screen capture frequency; According to initialization screen capture frequency acquisition screen-picture; Whether monitoring receives the track following order, does not then send the screen-picture that captures if receive the track following order; Then further judge whether to receive operation click order if receive the track following order according to the track following order, order then recording occurring continuously clicking point coordinate position if receive the operation click, preset the opacity of each clicking point, will " in the middle of current clicking point and the clicking point before a bit and the distance of current clicking point " and the merchant of " current clicking point with clicking point distance " before, multiply by " current clicking point opacity is poor with clicking point opacity before ", the opacity that described product is added current clicking point is to draw the lines that opacity is successively decreased or increased progressively between continuous two clicking point; Be added to the lines of drawing on the screen-picture of catching and send; After transmission, judge whether to receive the interruption presentation command, then continue if not to catch screen-picture and send; If process ends then.
2. video teaching method according to claim 1 is characterized in that, the screen capture frequency be set in advance or be provided with by user oneself.
3. the device of a video teaching is characterized in that, this device comprises:
Monitoring means, whether monitoring receives presentation command, and whether monitoring receives the track following order;
The screen capture unit is when monitoring means monitors when receiving presentation command initialization screen capture frequency; According to initialization screen capture frequency acquisition screen-picture and send, and monitor when receiving the track following order at monitoring means, the screen capture picture with trajectory diagram that the receiving locus unit forms also sends;
Judging unit, be used for monitoring when receiving the track following order at monitoring means, and after screen-picture is caught in the screen capture unit, judge whether to receive operation and click order, and after the screen capture unit sends screen-picture, judge whether to receive the interruption presentation command, then the notification screen capture unit continues to catch screen-picture and sends if not; Monitoring means stops to monitor, the screen capture unit stops to catch screen-picture if then notify;
The track unit, be used for after judgment unit judges receives operation click order, the point coordinates position clicked continuously in record, preset the opacity of each clicking point, will " in the middle of current clicking point and the clicking point before a bit and the distance of current clicking point " and the merchant of " current clicking point with clicking point distance " before, multiply by " current clicking point opacity is poor with clicking point opacity before ", the opacity that described product is added current clicking point is to draw the lines that opacity is successively decreased or increased progressively between continuous two clicking point, with the lines of the drawing screen-picture that the screen capture unit catches that is added to, and described screen-picture notification screen capture unit sent.
4. the device of video teaching according to claim 3 is characterized in that, described track unit specifically comprises:
Record cell is used to write down continuous click point coordinates position, obtains the screen capture picture;
First computing unit is used for calculating the merchant of " in the middle of current clicking point and the clicking point before a bit with the distance of current clicking point " and " current clicking point with clicking point distance " before;
Second computing unit is used for the merchant that first computing unit calculates be multiply by the poor of current clicking point opacity and clicking point opacity before;
The 3rd computing unit is used for the difference that second computing unit calculates is added the opacity of current clicking point;
Superpositing unit, the final value that the 3rd computing unit the is calculated screen capture picture that record cell obtains that is added to, and send to the screen capture unit.
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| CN2007101230509A CN101083751B (en) | 2007-06-22 | 2007-06-22 | Video teaching method and apparatus |
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| CN2007101230509A CN101083751B (en) | 2007-06-22 | 2007-06-22 | Video teaching method and apparatus |
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| CN101083751B true CN101083751B (en) | 2010-09-15 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8151193B2 (en) * | 2007-12-21 | 2012-04-03 | Symantec Corporation | Providing image-based guidance for remote assistance |
| CN101616295A (en) * | 2009-07-15 | 2009-12-30 | 中兴通讯股份有限公司 | The generation method and apparatus of video file in the video calling |
| CN103354618B (en) * | 2013-06-24 | 2015-04-15 | 西安交通大学 | HLS-based multi-scenario streaming media adaptive live broadcast method |
| JP6611536B2 (en) * | 2015-09-28 | 2019-11-27 | キヤノン株式会社 | Remote support system, information processing apparatus, image processing apparatus, control method therefor, and program |
| CN106657850A (en) * | 2016-12-02 | 2017-05-10 | 深圳市创易联合科技有限公司 | Lesson content recording method and system |
| CN112449242A (en) * | 2019-09-05 | 2021-03-05 | 上海火月信息科技有限公司 | Online video teaching system, method and device |
| CN112732381B (en) * | 2020-12-30 | 2023-09-05 | 湖北盟道信息科技有限公司 | Desktop data acquisition method and system for online class |
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| CN1455372A (en) * | 2003-05-29 | 2003-11-12 | 上海交通大学 | Screen sharing and synchronous recording method based on IP network |
| CN1588302A (en) * | 2004-08-05 | 2005-03-02 | 深圳市友邻通讯设备有限公司 | Computer screen catching monitoring and recording method |
| CN1918624A (en) * | 2004-03-10 | 2007-02-21 | 松下电器产业株式会社 | Image transmission system and image transmission method |
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| CN1455372A (en) * | 2003-05-29 | 2003-11-12 | 上海交通大学 | Screen sharing and synchronous recording method based on IP network |
| CN1918624A (en) * | 2004-03-10 | 2007-02-21 | 松下电器产业株式会社 | Image transmission system and image transmission method |
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