CN103093654A - Double video camera interactive intelligent tracking teaching system - Google Patents
Double video camera interactive intelligent tracking teaching system Download PDFInfo
- Publication number
- CN103093654A CN103093654A CN2013100331160A CN201310033116A CN103093654A CN 103093654 A CN103093654 A CN 103093654A CN 2013100331160 A CN2013100331160 A CN 2013100331160A CN 201310033116 A CN201310033116 A CN 201310033116A CN 103093654 A CN103093654 A CN 103093654A
- Authority
- CN
- China
- Prior art keywords
- teacher
- student
- module
- video camera
- image
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
- Closed-Circuit Television Systems (AREA)
Abstract
The invention discloses a double video camera interactive intelligent tracking teaching system. The double video camera interactive intelligent tracking teaching system comprises an image collecting module, a video camera control module, a user interface interaction module, a thread interaction module, a teacher tracking module, a student testing module and a student tracking module. During the teaching process, a control main engine obtains images which are photographed by teachers and students in real time through a dual image acquisition card. A tracing algorithm and a detecting algorithm based on an image processing technique are used for calculating the results and choosing appropriate control strategies. Mutual change among signals are reasonably arranged, functions of the live video camera including swaying, pitching, zooming and focusing can be rapidly, flexibly and accurately achieved. Teachers are capable of locating a proper position in the shooting picture, and functions like teachers' automatic tracing and positioning, students' video mapping and offering a close-up view while questioning testing and writing on the blackboard are achieved. In the end, the automatic intelligent tracing teaching system of tracing the external disturbance, no specific behavior limits and shooting without specially-assigned person on guard is achieved.
Description
Technical field
The present invention relates to the interactive intelligent tracing teaching system of the technology such as a kind of combining image collection, moving object detection and tracking and camera control, belonged to computer vision instructional technology field.
Background technology
The agriculture that the section of receiving an education widelys popularize engineering far away inspires, rely on the high speed development of modern internet technology, comprise unprecedented development and the application of change, E-learning technology of mode of learning, the Web-based instruction day by day universal etc., the intelligent-tracking tutoring system puts it at each universities, middle and primary schools' classroom teaching of China gradually in recent years, becomes one of principal mode of teaching skill training.Fast development along with target following technical research in image processing in recent years and theory on computer vision, and computing machine and the related hardware equipment technology innovation speed of making rapid progress and the reduction of production cost, the intelligent-tracking tutoring system can not only allow each common teachers take the real-time follow-up image when giving lessons being under no restraint, and have all kinds of interface are provided, the advantage of convenient operation has obtained demand and application more widely in each teaching, training field.
for example, in the daily teaching of vast middle and primary schools, the teacher can give lessons according to teaching custom at ordinary times, system will carry out analytical calculation to its motion feature automatically, tracking strategy by efficient stable guarantees that the teacher is in the appropriate area of shooting picture constantly, then be made into multimedia file (courseware with teachers' instruction and with the process of student's interaction, teaching resource etc.), by means of teaching platforms such as the Web-based instruction and remote on-demand, the teaching resource of high-quality can be provided for the backcountry student, and this system can also be government's meeting, corporate training, academic exchange, the industries such as basic education provide the solution of multimedia messages.
Present common tutoring system scheme, indoor locating system as Guangzhou prestige subelectron difficult to understand Science and Technology Ltd., by the infrared reception bar that uses a plurality of infrared remote receivers to form, utilize the principle of mutual send and receive signal between sensor to obtain target location coordinate information, but it does not relate to the identification to the teacher and student action, and function ratio is more single; The multi-item panorama infrared locking and tracking camera shot system of sharp technology company limited is opened in Hangzhou, its main camera is equipped with infrared camera and therewith rotates, infrared target that can any angle of locking tracking, but when giving close-up shot to teacher's writing on the blackboard action, must detect by sensor special, and whole system comprises two tracking cameras, two infrared cameras, complex structure, the teacher also must wear infrared transmitter during giving lessons; Beijing Tongbu Technology Co., Ltd. comprises a classroom feature video camera, an active infrared scan video camera and student's panoramic camera, realize tracking to the teacher by infrared detection technique, but only realize the function of photographing panoramic picture for student's video camera, system lacks interactivity; The framing system of Beijing Han Boer Information Technology Co., Ltd comprises teacher's positioning shooting machine, teacher's tracking camera, two orientation of student video cameras, a student trace video camera, good tracking is arranged and detect effect, but its whole system body structure is complicated, and cost is expensive, is unfavorable for installing and safeguarding;
Summary of the invention
The problem to be solved in the present invention is, in at present common system scheme, the tracking to the teacher that easily occurs is subject to that surrounding environment influence, teachers' instruction moving region are limited, the interchange between teacher and student is less, need special messenger's compounding practice, and the defectives such as system configuration complicated (greater than two video cameras or need other sensor special spare) have designed a kind of twin camera interactive intelligence tracing teaching system for teaching.
For realizing the purpose of present design, the invention provides a kind of twin camera interactive intelligent tracing teaching system.Site-plan comprises as shown in Figure 1:
Image capture module: use two-way image pick-up card can be in real time and independently respectively to teacher's video camera and student's camera acquisition image, then be stored in frame by frame the image that collects in Installed System Memory, the image that wherein teacher's camera acquisition is arrived is as the input picture of teacher's tracking module or student trace module, and the image that student's video camera is collected is as the input picture of student's detection module; When the camera control module receives when teacher or student's video camera are produced the instruction of motion control, the image that image capture module can collect by renewal shows in the display window of user interface interaction module in real time;
Camera control module: under manual tracing mode, the zone that the operator observes for needs, only need in the picture disply window of interface alternation module, use left mouse button to click this zone, just can to teacher's video camera sending controling instruction, make this zone that goes to of its fast and stable, the mouse beacon pulley is during to front slide, this zone is amplified check, when sliding backward, can enlarge observed regional extent; Under automatic tracing mode, the teacher's tracking module that comprises in the thread interactive mode, student trace module and student's detection module can be coordinated switch and calculate between teacher's tracking, student's detection and student trace flow process according to corresponding determination strategy, realize the independence of teacher's video camera and student's video camera is controlled function according to its result that obtains, comprise during the teacher follows the tracks of and control, when the student stands up and answers a question, the student given the actions such as close-up shot to swing and the convergent-divergent of teacher's video camera;
User interface interaction module: for the user provides the interface to support to the operation of system and operation, comprise the selection of initiation parameter setting unit, tracking mode and to the real-time demonstration of teacher's video camera in the figure acquisition module and student's shot by camera image; Wherein, initial parameter arranges the interface and comprises the height information to the teacher, and the classroom is long, the typing of high dimensional parameters, and calculates and return concrete installation parameter according to the geometric relationship that system installs.On the other hand, can carry out Lookup protocol by the initial position when the motion tracking to the teacher according to teacher's height; Then the user each frame shown in the picture disply window of appointment in real time by the image that image capture module collects, so that can observe the most intuitively to the result that teacher's tracking, student trace and student detect; Tracking mode provides two kinds of selections: manual tracking mode and autotrack mode, when selecting manual tracking mode, for application request, can be in the shooting display window of teacher's video camera, according to corresponding rule, but the simple operations mouse is the interactive function between completing user and system just, reaches the purpose that classroom arbitrary region convergent-divergent is checked; When selecting autotrack mode, in initial parameter after setting completed, after clicking " bringing into operation " button, the operation of system and be all automatically to carry out for the operation of thread interactive module, camera control module and image capture module, need not extra manual operation, convenient succinct;
thread interactive module: when automatic tracing mode is selected by system, and after clicking " bringing into operation " button, to pass to teacher's tracking module for the coloured image that collects from teacher's video camera, through characteristic area identification, template extraction, set up mixed Gauss model, set up the color of object histogram, maximum likelihood is estimated (EM), after the steps such as Kalman prediction search target, can obtain the concrete movable information of teacher and location parameter, and realize teacher's video camera is swung according to designed teacher's tracking strategy, the control that convergent-divergent and focusing etc. moves, for the coloured image that collects from student's video camera, it is passed to student's detection module, after processing through color space conversion, smoothing processing, thresholding processing, Gauss's dynamic background, obtain the testing result of student movement, and realize accordingly the function to the relevant action control of student's video camera, when student's detection module detects the Students on platform writing on the blackboard and answers a question, by sending message to the thread interactive module, switch teacher's tracking module to the student trace module, and make teacher's tracking module temporary suspension, the student trace module brings into operation, from teacher's camera acquisition to image pass through image gray-scale transformation, thresholding is processed, after background is wiped out processing, the student's location parameter that calculates, if satisfy certain threshold condition, control teacher's video camera and give the close-up shot demonstration to student's writing on the blackboard, when the seat is gone back at the dais under the student being detected, again carry out the switch operating of module thread, recover the function of teacher's tracking module, and the student trace module is hung up,
teacher's tracking module: the image that gathers for teacher's video camera of Real-time Obtaining from image capture module, at first in the first two field picture to whether existing teacher's characteristic area to judge, if exist and its characteristic area carried out the template modeling, do not point out mistake if do not exist, restart to detect, then mixed Gauss model is set up in teacher's feature templates region, and according to the distribution situation of its color histogram, the probability that the position coordinates of characteristic area is occurred by maximum likelihood estimation algorithm (EM) carries out likelihood to be estimated to calculate, and obtains teacher's characteristic area in the estimated position of current frame image, at last, teacher's characteristic area position coordinates in previous frame and current frame image is carried out the data recursive operation by Kalman filter, obtain the accurate estimated position parameter of teacher's characteristic area in present frame, can obtain thus positional information and characteristic area parameter during teacher movement, when the position coordinates that serves as a teacher is moved, can control teacher's video camera swings or pitching accordingly according to size and the direction that its coordinate moves difference, if in computation process, the teacher position being detected is not moved at the appointed time, and the detected value of teacher's characteristic area is less than certain threshold value, think that the teacher is carrying on the back the body book this moment, give the feature enlarging lens by controlling teacher's video camera to its writing on the blackboard, in order to can show clearly teacher's writing on the blackboard in the display window of interface alternation module,
Student's detection module: the image that gathers for student's video camera of Real-time Obtaining from image capture module, at first carry out the initialisation image pre-service, with image from color space conversion to gray space, then student residing classroom area image is set up background model, to the background model obtained through the wave filter smoothing processing after, realize detection to student movement by this background model of real-time update; When having the student to stand up or to produce other violate-action, will cause the variation of background model, by can be calculated location parameter and the eigenwert size that produces the moving region, again accessed parameter information is processed through thresholding, only just think in the situation that satisfy the action that certain threshold condition produces the correct operation that the student stands up, and control student's video camera and give close-up shot to the student that stands up, otherwise think the violate-action to detecting, ignore; Then the eigenwert of the moving region that produces change of background is calculated, determine whether the correct operation of answering a question for Students on platform by condition judgment, if really answer a question for Students on platform, realize that by sending message to the thread interactive module teacher's tracking module is to the switching of student trace module, and after cushioning by certain hour, again upgrade the background model in zone, classroom and continue student movement is detected;
Student trace module: when the thread interactive module is obtained the testing result of the Students on platform writing on the blackboard answer that is detected by student's detection module, realize switching between teacher's tracking module and student trace module by message processing facility, hang up teacher's tracking module, and the student trace module that brings into operation; This moment is with the coloured image of teacher's camera acquisition, at first process through image binaryzation, by pixel is carried out opening and closing operation, removal produces the noise that disturbs to testing result, then obtain movable information during Students on platform by the interframe background method of wiping out, during mobile beginning writing on the blackboard, teacher's video camera is controlled to realize to give close-up shot to student's writing on the blackboard in the zone, dais when the student being detected, and clear demonstration student writing on the blackboard in the display window of interface alternation module; When the moving characteristic value that the student detected surpasses certain threshold value, think that the student went down the dais and got back to the seat this moment, send message to the thread interactive module, realize the switching again with teacher's tracking module, teacher's tracking module is brought into operation, and the student trace module is hung up.
The present invention's advantage compared with prior art is:
(1) teacher's track algorithm of the present invention not only can detect tracking to the motion of teacher in blackboard and zone, dais in real time, and can also judge the situation whether teacher carries out writing on the blackboard in the blackboard zone, if just in writing on the blackboard, control teacher's video camera its writing on the blackboard is provided close-up shot.Teacher's tracking module of the present invention is during teachers' instruction, to the comprehensive scope trace that the teacher carries out, comprises that it walks about at the dais and go down the situation of dais when entering in the middle of the student.
(2) this cover system of realizing based on tracking and the detection algorithm of machine vision and pattern-recognition, restriction and constraint to teachers' instruction zone and action have been liberated to a great extent in actual use, compare with infra-red tracing system with active supersonic sounding technology, the teacher need not to wear the transmitter locating device, the extraction that only needs to carry out the characteristic area template when beginning in system gets final product, and the long operation of system can not produce any health effect to the teacher yet; Compare with wearing the transmitter location technology, the present invention does not claim to the action during teachers' instruction and moving range, and teacher's pursuit movement zone is more extensive; With compare based on the Multichannel fusion technology, the present invention has certain antijamming capability to the impact of shade and illumination, and is better to the light adaptation in the classroom, the tracking stability of algorithm is stronger.
(3) student's detection module of the present invention not only rises immediately the student being detected, give and the student's close-up shot of standing up, and can be when Students on platform being detected and write writing on the blackboard and answer a question, send message to main frame, send interactive type communication with teacher's track thread, thereby realize upper dais student's tracking and writing on the blackboard given the function of close-up shot.
(4) teaching tracker commonly used for the operations such as control of camera lens, need to tend to many people's cooperation, and also needs to carry out artificial processing processing after recording.And in the present invention, can select according to the actual requirements tracking mode, when being in autotrack mode lower time, comprising thread interactive module, camera control module and following the tracks of picture disply etc. is all automatically to complete, and need not the special messenger and carries out operation bidirectional.
(5) the present invention only uses two video cameras, by a main frame, they are carried out corresponding control, not only reduced system cost, and the initial parameter setting unit that the user interface interaction module comprises can provide directly perceived easy help for system's installation and initial parameter setting.System also provides the proprietary extensions mouth for network direct broadcasting and teaching recorded broadcast, can under the prerequisite of the system of assurance favorable compatibility, enlarge its range of application and applicable scene.
Description of drawings
Fig. 1 is the overall design drawing of a kind of twin camera interactive intelligent of the present invention tracing teaching system;
Fig. 2 is the design drawing of user interface interaction module in the present invention;
Fig. 3 is the design drawing of initial parameter setting unit in the present invention;
Fig. 4 is the process flow diagram of teacher's tracking module in the present invention;
Fig. 5 is the process flow diagram of middle school student's detection module of the present invention;
Fig. 6 is the process flow diagram of middle school student's tracking module of the present invention;
Fig. 7,8 is the scheme of installation in the present invention.
Embodiment
As shown in Figure 1, a kind of twin camera interactive intelligent of the present invention tracing teaching system is by 8 module compositions: image capture module, camera control module, user interface interaction module, thread interactive module, teacher's tracking module, student's detection module, student trace module.
Whole implementation procedure is as follows:
(1) system initialization parameter set unit.In the process that actual installation is used, size for different classrooms, the installation site of teacher's video camera and student's video camera all can be different, arrange by the system initialization parameter, ceiling height and angle of inclination in the time of can obtaining the video camera installation, in order to obtain better to follow the tracks of and detect effect in the later stage, toward contact, the initial presetting bit of teacher's video camera need to be set according to actual conditions; For teacher's height information of input, also the angle of inclination when calculating student's video camera and install provides foundation, calculates complete after, the initiation parameter setting unit is the modification systematic parameter automatically, with the variation that conforms.
(2) realization of camera control and image collecting function.Guidance according to the system initialization parameter, after installing video camera, image capture module respectively by the Color Image Acquisition card from teacher's video camera and student's camera acquisition image, be stored in frame by frame in the internal memory of computing machine, read successively in needs, then show in real time in the teacher's video camera display window in User Interface and student's video camera display window, for the user by visual and clear shooting picture.Tracking condition according to system's operation needs satisfy sends instruction by 485 buses to the camera control module, through overregulating the steps such as viewing area size, focal length of camera, reaches desirable display effect.For the collection of image during camera motion, movement velocity that need to be by video camera is set and the collection display speed of image capture module, the stability of guarantee picture disply and real-time.
(3) realization of teacher's tracking and student's detection, following function.
Manually under tracing mode, the user only need by mouse just can be directly and on user interface the shooting picture in teacher's video camera display window carry out alternately, click left mouse button in the zone of wanting to observe, just can send corresponding steering order to the camera control module, if click fringe region, video camera can move to the appointed place with speed faster, if click the zone close to from the centre position, video camera can move to slower speed this place.If need to obtain the picture rich in detail of writing on the blackboard on blackboard, only need the intermediate roller of sliding mouse forward, when sliding backward mouse roller, can enlarge the scope of observation, in order to observe from the overall situation process of giving lessons.
Automatically under tracing mode, at first the user need to arrange the height information that the teacher is provided in module at initiation parameter, the user interface interaction module can be according to teacher's height, automatically regulate the initial position that the teacher follows the tracks of, and is in teacher's video camera apparent centre position to guarantee the teacher.After clicking the button of " bringing into operation ", teacher's tracking module and student's detection module move simultaneously, wherein teacher's tracking module carries out detection and tracking in strict accordance with teacher's tracking strategy to teacher's motion, if teacher's transverse shifting, send instruction to teacher's video camera, make it swing to guarantee that according to certain speed the teacher is in the appropriate location of picture disply constantly, if teacher's writing on the blackboard gives close-up shot to its writing on the blackboard.If student's detection module detects the student and stands up to answer a question and send instruction to student's video camera, the student gives close-up shot to standing up, go on dais writing on the blackboard answer if the student detected, send message to the thread interactive module, by it, teacher's tracking module and student trace module are switched, the student trace module brings into operation.If the student trace module detects student's writing on the blackboard, give close-up shot to its writing on the blackboard, go back to the seat if the student detected, again send message to the thread interactive module, the student trace module is switched to teacher's tracking module, recovered the function of teacher's tracking module.
(4) user interface output.be provided with teacher's video camera display window and student's video camera display window on the main interface of user interface interaction module, the presetting bit of teacher's video camera arranges button, and teacher's video camera velocity of rotation button is set, can allow the user according to oneself demand and wish to the camera control module, image capture module and thread interactive module directly operate, then obtain corresponding shooting picture from follow the tracks of the testing result display window, thereby directly the teacher is followed the tracks of and student's detection from the display window of teacher's video camera and student's video camera, the process of following the tracks of is observed.
The specific implementation process of above-mentioned each module is as follows:
1. user interface interaction module
This Model Implement process is as shown in Fig. 2,3:
(1) after working procedure, main interface as shown in Figure 2 appears, the left window is teacher's video camera display window, right side window is student's video camera display window, in functional area below main interface, the left side comprises that tracking mode choice box, initiation parameter arrange button, button is set camera motion speed and teacher's preset positions of camera arranges button, middle for image capture module is released the button, system moves button and exit button, the right side is action button and student's testing result display box of camera control module; In the tracking mode choice box, complete selection to the system keeps track mode by clicking different options;
(2) click initiation parameter window is set, can the ejection system parameter interface be set as shown in Figure 3, insert teacher's height data in teacher's height edit box, for guaranteeing tracking effect, acquiescence allows teacher's height between 150cm ~ 200cm, clicks teacher's height confirmation is set.In the size edit box of classroom, insert successively classroom length, height and dais to the distance of blackboard, after clicking installation parameter calculating, system can calculate installation results automatically, and with parameter display in the edit box of ceiling height and mounting inclination angle, after setting completed, click and to determine to complete;
(3) set system operational parameters after, click " opening camera " button, begin the image capture module to teacher's video camera and student's video camera, then click " bringing into operation " button, corresponding function in the execution thread interactive module, follow the tracks of with the student for the teacher detect, the result of tracking will be real-time is presented in corresponding window interface;
(4) if the use of completion system only need click the button that quits a program when withdrawing from and get final product.
2. teacher's tracking module
Implementation procedure corresponding to this module be as shown in Figure 4:
(1) for from teacher's camera acquisition to image, first use sorter (Adaboost) in the zone, dais, teacher's characteristic area to be searched for, if find teacher's feature templates, it being set up mixed Gauss model processes, and according to the distribution situation of its color histogram, the probability that the position coordinates of characteristic area is occurred by maximum likelihood estimation algorithm (EM) carries out likelihood to be estimated to calculate, and obtains the estimated position of teacher in image; If do not find, Resurvey image continuation search is searched;
(2) the estimated position parameter that obtains is merged by Kalman filter and current frame image parameter, obtain accurate location coordinate and the eigenwert size of teacher's characteristic area in the next frame image, by the changes in coordinates of teacher's characteristic area being calculated to judge whether the teacher moves, if coordinate figure is non-vanishing, think to have produced during teachers' instruction and move left and right, send message to teacher's video camera this moment, control moving left and right of teacher's video camera, if coordinate figure is zero, carry out next step detection;
(3) do not carry out under the prerequisite of transverse shifting, the eigenwert of its characteristic area being calculated the teacher, if think that less than threshold value this moment, the teacher carried on the back the body book, send message to teacher's video camera and give the writing on the blackboard close-up shot; If return to detect greater than this threshold value and continue the calculated characteristics area coordinate;
(4) teacher's the coordinate that vertically moves detected, if greater than the dais position threshold, think that this moment, the teacher went down the dais, control teacher's video camera and be rocked to classroom zone presetting bit, if there is no this threshold value, continue to detect;
(5) serve as a teacher when moving in the zone, classroom, repeat equally above detecting step, if when the teacher being detected through the dais threshold value, think that this moment, the teacher got back to the dais, again its characteristic area is detected and follows the tracks of, if there is no process, continue to follow the tracks of;
(6) whole process shows in during teacher's tracking, the control action of teacher's video camera all being followed the tracks of the real-time teacher in the user interface interaction module of display window.
3. student's detection module
This Model Implement process is as shown in Figure 5:
(1) from student's camera acquisition to image, carry out the initialisation image pre-service, with image from color space conversion to gray space, and student residing classroom feature regional images is set up background model, after the background model obtained is processed through filtering, realize detection to student movement by this background model of real-time update;
(2) when having the student to stand up or to produce other disturbed motion, by calculating location parameter and the eigenwert size that produces the moving region, and the parameter information that calculates is processed through thresholding, only just think in the situation that satisfy the action that certain threshold condition produces the correct operation that the student stands up, and control student video camera gives close-up shot to the student that stands up, otherwise think the violate-action to detecting, ignore;
(3) eigenwert of the moving region that produces change of background is calculated, determine whether the correct operation of answering a question for Students on platform by condition judgment, if really answer a question for Students on platform, by realize the switching between teacher's tracking module and student trace module to thread interactive module transmission message;
(4) through after certain surge time, student's detection module restarts to upgrade background, continues student's athletic performance is detected;
(5) whole process to the detection in student zone with give the demonstration in real time in student's detection window of user interface interaction module that the action such as close-up shot all will be real-time.
4. student trace module
This Model Implement process is as shown in Figure 6:
(1) when bringing into operation the student trace module under the switching of thread interactive module, will be by the coloured image of teacher's camera acquisition, at first process through image binaryzation, by pixel is carried out opening and closing operation, can produce the noise that disturbs to testing result in order to remove;
(2) obtain movable information and position coordinates during Students on platform by the interframe background method of wiping out, judge whether the student carries out the writing on the blackboard action, when the student being detected in the zone, dais during mobile beginning writing on the blackboard, teacher's video camera is sent message give close-up shot with realization to student's writing on the blackboard, otherwise continue to detect;
(3) when the moving characteristic value that the student detected surpasses certain threshold value, think that the student went down the dais and got back to the seat this moment, send message to the thread interactive module, realize the switching again with teacher's tracking module, teacher's tracking module is resumed operation, and the student trace module is hung up;
(4) whole process to student trace with writing on the blackboard is given the action such as close-up shot and all shows in the display window with real-time teacher's video camera shooting picture in the user interface interaction module.
5. system installs and calculates
As shown in Fig. 7,8, be the scheme of installation of twin camera interactive intelligent tracing teaching system, concrete computation process is as follows:
Camera is to the setting height(from bottom) of ceiling: H
0cm; Camera is to the height on ground: H
1cm; The outside, dais is to the distance of blackboard: S
0cm; The height in classroom: H cm; The length in classroom: S cm; Teacher's height is: L cm; The angle of pitch of camera is: θ °;
Can be calculated by simple geometry:
The minimum value of the camera angle of pitch is:
The maximal value of the camera angle of pitch is:
The setting height(from bottom) of camera is: H
0=H-H
1; The span that the angle of pitch is installed is:
The non-elaborated part of the present invention belongs to those skilled in the art's known technology; In addition the above; only be the embodiment in the present invention; but protection scope of the present invention is not limited to this; anyly be familiar with the people of this technology in the disclosed technical scope of the present invention; can understand conversion or the replacement expected; all should be encompassed in of the present invention comprise scope within, therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (1)
1. a twin camera interactive intelligent tracing teaching system, is characterized in that comprising: image capture module, camera control module, user interface interaction module, thread interactive module, teacher's tracking module, student's detection module, student trace module;
Image capture module: use two-way image pick-up card can be in real time and independently respectively to teacher's video camera and student's camera acquisition image, then be stored in frame by frame the image that collects in Installed System Memory, the image that wherein teacher's camera acquisition is arrived is as the input picture of teacher's tracking module or student trace module, and the image that student's video camera is collected is as the input picture of student's detection module; When the camera control module receives when teacher or student's video camera are produced the instruction of motion control, the image that image capture module can collect by renewal shows in the display window of user interface interaction module in real time;
Camera control module: under manual tracing mode, the zone that the operator observes for needs, only need in the picture disply window of interface alternation module, use left mouse button to click this zone, just can to teacher's video camera sending controling instruction, make this zone that goes to of its fast and stable, the mouse beacon pulley is during to front slide, this zone is amplified check, when sliding backward, can enlarge observed regional extent; Under automatic tracing mode, the teacher's tracking module that comprises in the thread interactive mode, student trace module and student's detection module can be coordinated switch and calculate between teacher's tracking, student's detection and student trace flow process according to corresponding determination strategy, realize the independence of teacher's video camera and student's video camera is controlled function according to its result that obtains, comprise during the teacher follows the tracks of and control, when the student stands up and answers a question, the student given the actions such as close-up shot to swing and the convergent-divergent of teacher's video camera;
User interface interaction module: for the user provides the interface to support to the operation of system and operation, comprise the selection of initiation parameter setting unit, tracking mode and to the real-time demonstration of teacher's video camera in the figure acquisition module and student's shot by camera image; Wherein, initial parameter arranges the interface and comprises the height information to the teacher, and the classroom is long, the typing of high dimensional parameters, and calculates and return concrete installation parameter according to the geometric relationship that system installs.On the other hand, can carry out Lookup protocol by the initial position when the motion tracking to the teacher according to teacher's height; Then the user each frame shown in the picture disply window of appointment in real time by the image that image capture module collects, so that can observe the most intuitively to the result that teacher's tracking, student trace and student detect; Tracking mode provides two kinds of selections: manual tracking mode and autotrack mode, when selecting manual tracking mode, for application request, can be in the shooting display window of teacher's video camera, according to corresponding rule, but the simple operations mouse is the interactive function between completing user and system just, reaches the purpose that classroom arbitrary region convergent-divergent is checked; When selecting autotrack mode, in initial parameter after setting completed, after clicking " bringing into operation " button, the operation of system and be all automatically to carry out for the operation of thread interactive module, camera control module and image capture module, need not extra manual operation, convenient succinct;
thread interactive module: when automatic tracing mode is selected by system, and after clicking " bringing into operation " button, to pass to teacher's tracking module for the coloured image that collects from teacher's video camera, through characteristic area identification, template extraction, set up mixed Gauss model, set up the color of object histogram, maximum likelihood is estimated (EM), after the steps such as Kalman prediction search target, can obtain the concrete movable information of teacher and location parameter, and realize teacher's video camera is swung according to designed teacher's tracking strategy, the control that convergent-divergent and focusing etc. moves, for the coloured image that collects from student's video camera, it is passed to student's detection module, after processing through color space conversion, smoothing processing, thresholding processing, Gauss's dynamic background, obtain the testing result of student movement, and realize accordingly the function to the relevant action control of student's video camera, when student's detection module detects the Students on platform writing on the blackboard and answers a question, by sending message to the thread interactive module, switch teacher's tracking module to the student trace module, and make teacher's tracking module temporary suspension, the student trace module brings into operation, from teacher's camera acquisition to image pass through image gray-scale transformation, thresholding is processed, after background is wiped out processing, the student's location parameter that calculates, if satisfy certain threshold condition, control teacher's video camera and give the close-up shot demonstration to student's writing on the blackboard, when the seat is gone back at the dais under the student being detected, again carry out the switch operating of module thread, recover the function of teacher's tracking module, and the student trace module is hung up,
teacher's tracking module: the image that gathers for teacher's video camera of Real-time Obtaining from image capture module, at first in the first two field picture to whether existing teacher's characteristic area to judge, if exist and its characteristic area carried out the template modeling, do not point out mistake if do not exist, restart to detect, then mixed Gauss model is set up in teacher's feature templates region, and according to the distribution situation of its color histogram, the probability that the position coordinates of characteristic area is occurred by maximum likelihood estimation algorithm (EM) carries out likelihood to be estimated to calculate, and obtains teacher's characteristic area in the estimated position of current frame image, at last, teacher's characteristic area position coordinates in previous frame and current frame image is carried out the data recursive operation by Kalman filter, obtain the accurate estimated position parameter of teacher's characteristic area in present frame, can obtain thus positional information and characteristic area parameter during teacher movement, when the position coordinates that serves as a teacher is moved, can control teacher's video camera swings or pitching accordingly according to size and the direction that its coordinate moves difference, if in computation process, the teacher position being detected is not moved at the appointed time, and the detected value of teacher's characteristic area is less than certain threshold value, think that the teacher is carrying on the back the body book this moment, give the feature enlarging lens by controlling teacher's video camera to its writing on the blackboard, in order to can show clearly teacher's writing on the blackboard in the display window of interface alternation module,
Student's detection module: the image that gathers for student's video camera of Real-time Obtaining from image capture module, at first carry out the initialisation image pre-service, with image from color space conversion to gray space, then student residing classroom area image is set up background model, to the background model obtained through the wave filter smoothing processing after, realize detection to student movement by this background model of real-time update; When having the student to stand up or to produce other violate-action, will cause the variation of background model, by can be calculated location parameter and the eigenwert size that produces the moving region, again accessed parameter information is processed through thresholding, only just think in the situation that satisfy the action that certain threshold condition produces the correct operation that the student stands up, and control student's video camera and give close-up shot to the student that stands up, otherwise think the violate-action to detecting, ignore; Then the eigenwert of the moving region that produces change of background is calculated, determine whether the correct operation of answering a question for Students on platform by condition judgment, if really answer a question for Students on platform, realize that by sending message to the thread interactive module teacher's tracking module is to the switching of student trace module, and after cushioning by certain hour, again upgrade the background model in zone, classroom and continue student movement is detected;
Student trace module: when the thread interactive module is obtained the testing result of the Students on platform writing on the blackboard answer that is detected by student's detection module, realize switching between teacher's tracking module and student trace module by message processing facility, hang up teacher's tracking module, and the student trace module that brings into operation; This moment is with the coloured image of teacher's camera acquisition, at first process through image binaryzation, by pixel is carried out opening and closing operation, removal produces the noise that disturbs to testing result, then obtain movable information during Students on platform by the interframe background method of wiping out, during mobile beginning writing on the blackboard, teacher's video camera is controlled to realize to give close-up shot to student's writing on the blackboard in the zone, dais when the student being detected, and clear demonstration student writing on the blackboard in the display window of interface alternation module; When the moving characteristic value that the student detected surpasses certain threshold value, think that the student went down the dais and got back to the seat this moment, send message to the thread interactive module, realize the switching again with teacher's tracking module, teacher's tracking module is brought into operation, and the student trace module is hung up.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310033116.0A CN103093654B (en) | 2013-01-28 | 2013-01-28 | Double video camera interactive intelligent tracking teaching system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310033116.0A CN103093654B (en) | 2013-01-28 | 2013-01-28 | Double video camera interactive intelligent tracking teaching system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103093654A true CN103093654A (en) | 2013-05-08 |
| CN103093654B CN103093654B (en) | 2014-12-03 |
Family
ID=48206171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310033116.0A Active CN103093654B (en) | 2013-01-28 | 2013-01-28 | Double video camera interactive intelligent tracking teaching system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103093654B (en) |
Cited By (45)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103281508A (en) * | 2013-05-23 | 2013-09-04 | 深圳锐取信息技术股份有限公司 | Video picture switching method, video picture switching system, recording and broadcasting server and video recording and broadcasting system |
| CN103327250A (en) * | 2013-06-24 | 2013-09-25 | 深圳锐取信息技术股份有限公司 | Method for controlling camera lens based on pattern recognition |
| CN103905734A (en) * | 2014-04-17 | 2014-07-02 | 苏州科达科技股份有限公司 | Method and device for intelligent tracking and photographing |
| CN104065924A (en) * | 2014-06-23 | 2014-09-24 | 苏州阔地网络科技有限公司 | On-line synchronization classroom intelligent tracking method and system |
| CN104202529A (en) * | 2014-09-18 | 2014-12-10 | 深圳市科松电子有限公司 | Method and device for controlling states of cameras |
| CN104268887A (en) * | 2014-09-30 | 2015-01-07 | 深圳市科松电子有限公司 | Method and device used for calibrating gestures of camera and suitable for multi-scene switching |
| CN104394363A (en) * | 2014-11-21 | 2015-03-04 | 苏州阔地网络科技有限公司 | Online class directing method and system |
| CN104574359A (en) * | 2014-11-03 | 2015-04-29 | 南京邮电大学 | Student tracking and positioning method based on primary and secondary cameras |
| CN104869365A (en) * | 2015-06-02 | 2015-08-26 | 阔地教育科技有限公司 | Direct recording and broadcasting system based mouse tracking method and device |
| WO2015196584A1 (en) * | 2014-06-26 | 2015-12-30 | 北京小鱼儿科技有限公司 | Smart recording system |
| WO2015196513A1 (en) * | 2014-06-23 | 2015-12-30 | 苏州阔地网络科技有限公司 | Online synchronous class tracking control method and system |
| CN105578044A (en) * | 2015-12-22 | 2016-05-11 | 杭州凡龙科技有限公司 | Panoramic view adaptive teacher image analysis method |
| CN105611237A (en) * | 2015-12-22 | 2016-05-25 | 杭州凡龙科技有限公司 | Method for simulating five cameras by utilizing double cameras for education recording and broadcasting |
| CN106161930A (en) * | 2016-06-27 | 2016-11-23 | 乐视控股（北京）有限公司 | Camera control method and device |
| CN103281508B (en) * | 2013-05-23 | 2016-11-30 | 深圳锐取信息技术股份有限公司 | Video picture switching process, system, recorded broadcast server and video recording and broadcasting system |
| CN106454200A (en) * | 2016-08-10 | 2017-02-22 | 惠州紫旭科技有限公司 | Video interaction method and video interaction system based on scene switching |
| CN106657893A (en) * | 2016-11-10 | 2017-05-10 | 浙江蓝鸽科技有限公司 | Recorded broadcasting method and system with intelligent switching function |
| CN106780565A (en) * | 2016-11-15 | 2017-05-31 | 天津大学 | A kind of many students based on light stream and k means clusters rise and sit detection method |
| CN106878759A (en) * | 2017-02-13 | 2017-06-20 | 广东小天才科技有限公司 | Multi-camera lens switching method and system in teaching live broadcast |
| CN106941580A (en) * | 2017-03-22 | 2017-07-11 | 北京昊翔信达科技有限公司 | Method and system of the teacher student from motion tracking is realized based on single detective camera lens |
| CN107146499A (en) * | 2017-07-03 | 2017-09-08 | 徐志强 | A kind of teaching auxiliary device |
| CN107424169A (en) * | 2017-08-02 | 2017-12-01 | 北京翰博尔信息技术股份有限公司 | Orientation of student method and device |
| CN107452018A (en) * | 2017-08-02 | 2017-12-08 | 北京翰博尔信息技术股份有限公司 | Speaker's tracking and system |
| CN107809563A (en) * | 2017-11-30 | 2018-03-16 | 浙江大华技术股份有限公司 | A kind of writing on the blackboard detecting system, method and device |
| CN108230781A (en) * | 2018-03-12 | 2018-06-29 | 淄博职业学院 | A kind of multimedia education platform of achievable Network Synchronization |
| CN108665737A (en) * | 2018-06-26 | 2018-10-16 | 吉林省瑞中科技有限公司 | Novel classroom projection lamp |
| CN108766067A (en) * | 2018-08-03 | 2018-11-06 | 青岛华师京城网络科技有限公司 | A kind of implementation method in contact classroom |
| CN108881765A (en) * | 2018-05-25 | 2018-11-23 | 讯飞幻境(北京)科技有限公司 | Light weight recorded broadcast method, apparatus and system |
| CN109522846A (en) * | 2018-11-19 | 2019-03-26 | 深圳博为教育科技有限公司 | One kind is stood up monitoring method, device, server and monitoring system of standing up |
| CN109635787A (en) * | 2019-01-22 | 2019-04-16 | 合肥市云联鸿达信息技术有限公司 | A kind of tracking camera shooting tutoring system |
| CN109672836A (en) * | 2018-12-28 | 2019-04-23 | 黑龙江工业学院 | A kind of English study computer recording apparatus |
| CN110021033A (en) * | 2019-02-22 | 2019-07-16 | 广西师范大学 | A kind of method for tracking target based on the twin network of pyramid |
| CN110933316A (en) * | 2019-12-12 | 2020-03-27 | 苏州杰胜通信息技术有限公司 | Teacher tracking teaching system based on double-camera interactive mode |
| CN111480332A (en) * | 2017-12-21 | 2020-07-31 | 索尼公司 | Controller and control method |
| CN111652045A (en) * | 2020-04-17 | 2020-09-11 | 西北工业大学太仓长三角研究院 | Classroom teaching quality assessment method and system |
| CN111754830A (en) * | 2020-07-07 | 2020-10-09 | 广西师范大学漓江学院 | Interactive teaching instrument for vocal music teaching |
| CN111835969A (en) * | 2020-07-06 | 2020-10-27 | 海信视像科技股份有限公司 | Interactive method for controlling angle of camera and display equipment |
| CN112446241A (en) * | 2019-08-29 | 2021-03-05 | 阿里巴巴集团控股有限公司 | Method and device for obtaining characteristic information of target object and electronic equipment |
| CN112804487A (en) * | 2020-12-30 | 2021-05-14 | 济南和普威视光电技术有限公司 | Double-path video target tracking method and system |
| CN112911150A (en) * | 2021-01-29 | 2021-06-04 | 广州合易威视信息科技有限公司 | Automatic snapshot method for high-definition human face in target area |
| CN113055604A (en) * | 2021-04-01 | 2021-06-29 | 四川新视创伟超高清科技有限公司 | Optimal visual angle video processing system and method based on 8K video signal and AI technology |
| CN113572965A (en) * | 2021-08-06 | 2021-10-29 | 广州市奥威亚电子科技有限公司 | Double-blackboard-writing tracking shooting method and device and shooting system |
| CN113763760A (en) * | 2020-06-02 | 2021-12-07 | 重庆艾艺荷马教育科技股份有限公司 | Multimedia fine arts teaching equipment based on internet |
| CN113910815A (en) * | 2021-11-29 | 2022-01-11 | 深圳市卓翼科技股份有限公司 | Integrated form blackboard |
| CN114245146A (en) * | 2021-12-02 | 2022-03-25 | 北京鸿合爱学教育科技有限公司 | Display picture switching method, device, equipment and computer readable storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020192631A1 (en) * | 2001-05-23 | 2002-12-19 | Chase Weir | Method and system for interactive teaching |
| JP2006163692A (en) * | 2004-12-06 | 2006-06-22 | Canon Inc | Print control apparatus and print control method |
| CN101043616A (en) * | 2007-02-07 | 2007-09-26 | 北京航空航天大学 | Method for controlling automatically video camera moving according image position of objects |
| CN201233664Y (en) * | 2008-06-27 | 2009-05-06 | 深圳市和强迪讯科技发展有限公司 | Apparatus for implementing interactive teaching by using network |
-
2013
- 2013-01-28 CN CN201310033116.0A patent/CN103093654B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020192631A1 (en) * | 2001-05-23 | 2002-12-19 | Chase Weir | Method and system for interactive teaching |
| JP2006163692A (en) * | 2004-12-06 | 2006-06-22 | Canon Inc | Print control apparatus and print control method |
| CN101043616A (en) * | 2007-02-07 | 2007-09-26 | 北京航空航天大学 | Method for controlling automatically video camera moving according image position of objects |
| CN201233664Y (en) * | 2008-06-27 | 2009-05-06 | 深圳市和强迪讯科技发展有限公司 | Apparatus for implementing interactive teaching by using network |
Non-Patent Citations (2)
| Title |
|---|
| 李季: "远程实时交互式双向视频教学系统的设计与实现", 《现代电子技术》 * |
| 王睿,李欣,张广军: "单目主动视觉无人机导引中摄像机内参数标定的线性方法", 《航空学报》 * |
Cited By (62)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103281508A (en) * | 2013-05-23 | 2013-09-04 | 深圳锐取信息技术股份有限公司 | Video picture switching method, video picture switching system, recording and broadcasting server and video recording and broadcasting system |
| CN103281508B (en) * | 2013-05-23 | 2016-11-30 | 深圳锐取信息技术股份有限公司 | Video picture switching process, system, recorded broadcast server and video recording and broadcasting system |
| CN103327250A (en) * | 2013-06-24 | 2013-09-25 | 深圳锐取信息技术股份有限公司 | Method for controlling camera lens based on pattern recognition |
| CN103905734A (en) * | 2014-04-17 | 2014-07-02 | 苏州科达科技股份有限公司 | Method and device for intelligent tracking and photographing |
| WO2015196514A1 (en) * | 2014-06-23 | 2015-12-30 | 苏州阔地网络科技有限公司 | Online synchronous class intelligent tracking method and system |
| CN104065924A (en) * | 2014-06-23 | 2014-09-24 | 苏州阔地网络科技有限公司 | On-line synchronization classroom intelligent tracking method and system |
| WO2015196513A1 (en) * | 2014-06-23 | 2015-12-30 | 苏州阔地网络科技有限公司 | Online synchronous class tracking control method and system |
| WO2015196584A1 (en) * | 2014-06-26 | 2015-12-30 | 北京小鱼儿科技有限公司 | Smart recording system |
| US11184529B2 (en) | 2014-06-26 | 2021-11-23 | Ainemo Inc. | Smart recording system |
| CN104202529A (en) * | 2014-09-18 | 2014-12-10 | 深圳市科松电子有限公司 | Method and device for controlling states of cameras |
| CN104202529B (en) * | 2014-09-18 | 2018-07-24 | 深圳市中智科创机器人有限公司 | A kind of camera status control method and its device |
| CN104268887B (en) * | 2014-09-30 | 2017-07-11 | 中智科创机器人有限公司 | A kind of camera attitude scaling method and device suitable for the switching of many scenes |
| CN104268887A (en) * | 2014-09-30 | 2015-01-07 | 深圳市科松电子有限公司 | Method and device used for calibrating gestures of camera and suitable for multi-scene switching |
| CN104574359A (en) * | 2014-11-03 | 2015-04-29 | 南京邮电大学 | Student tracking and positioning method based on primary and secondary cameras |
| CN104574359B (en) * | 2014-11-03 | 2017-09-29 | 南京邮电大学 | A kind of student trace localization method based on principal and subordinate's video camera |
| CN104394363A (en) * | 2014-11-21 | 2015-03-04 | 苏州阔地网络科技有限公司 | Online class directing method and system |
| CN104394363B (en) * | 2014-11-21 | 2018-03-23 | 阔地教育科技有限公司 | A kind of Online class director method and system |
| CN104869365A (en) * | 2015-06-02 | 2015-08-26 | 阔地教育科技有限公司 | Direct recording and broadcasting system based mouse tracking method and device |
| CN105611237A (en) * | 2015-12-22 | 2016-05-25 | 杭州凡龙科技有限公司 | Method for simulating five cameras by utilizing double cameras for education recording and broadcasting |
| CN105578044A (en) * | 2015-12-22 | 2016-05-11 | 杭州凡龙科技有限公司 | Panoramic view adaptive teacher image analysis method |
| CN106161930A (en) * | 2016-06-27 | 2016-11-23 | 乐视控股（北京）有限公司 | Camera control method and device |
| CN106454200A (en) * | 2016-08-10 | 2017-02-22 | 惠州紫旭科技有限公司 | Video interaction method and video interaction system based on scene switching |
| CN106657893A (en) * | 2016-11-10 | 2017-05-10 | 浙江蓝鸽科技有限公司 | Recorded broadcasting method and system with intelligent switching function |
| CN106657893B (en) * | 2016-11-10 | 2019-09-03 | 浙江蓝鸽科技有限公司 | Recorded broadcast method and system with intelligent handoff functionality |
| CN106780565A (en) * | 2016-11-15 | 2017-05-31 | 天津大学 | A kind of many students based on light stream and k means clusters rise and sit detection method |
| CN106780565B (en) * | 2016-11-15 | 2020-03-31 | 天津大学 | Multi-student sitting-up detection method based on optical flow and k-means clustering |
| CN106878759A (en) * | 2017-02-13 | 2017-06-20 | 广东小天才科技有限公司 | Multi-camera lens switching method and system in teaching live broadcast |
| CN106941580A (en) * | 2017-03-22 | 2017-07-11 | 北京昊翔信达科技有限公司 | Method and system of the teacher student from motion tracking is realized based on single detective camera lens |
| CN106941580B (en) * | 2017-03-22 | 2019-12-03 | 北京昊翔信达科技有限公司 | The method and system that teacher student automatically tracks is realized based on single detective camera lens |
| CN107146499A (en) * | 2017-07-03 | 2017-09-08 | 徐志强 | A kind of teaching auxiliary device |
| CN107146499B (en) * | 2017-07-03 | 2021-01-05 | 江苏赛诚极云网络科技有限公司 | Teaching auxiliary device |
| CN107424169A (en) * | 2017-08-02 | 2017-12-01 | 北京翰博尔信息技术股份有限公司 | Orientation of student method and device |
| CN107452018A (en) * | 2017-08-02 | 2017-12-08 | 北京翰博尔信息技术股份有限公司 | Speaker's tracking and system |
| CN107809563A (en) * | 2017-11-30 | 2018-03-16 | 浙江大华技术股份有限公司 | A kind of writing on the blackboard detecting system, method and device |
| CN107809563B (en) * | 2017-11-30 | 2019-12-24 | 浙江大华技术股份有限公司 | Blackboard writing detection system, method and device |
| CN111480332B (en) * | 2017-12-21 | 2022-08-02 | 索尼公司 | Controller and control method |
| US11265461B2 (en) | 2017-12-21 | 2022-03-01 | Sony Corporation | Controller and control method |
| US11818454B2 (en) | 2017-12-21 | 2023-11-14 | Sony Corporation | Controller and control method |
| CN111480332A (en) * | 2017-12-21 | 2020-07-31 | 索尼公司 | Controller and control method |
| CN108230781A (en) * | 2018-03-12 | 2018-06-29 | 淄博职业学院 | A kind of multimedia education platform of achievable Network Synchronization |
| CN108881765A (en) * | 2018-05-25 | 2018-11-23 | 讯飞幻境(北京)科技有限公司 | Light weight recorded broadcast method, apparatus and system |
| CN108665737A (en) * | 2018-06-26 | 2018-10-16 | 吉林省瑞中科技有限公司 | Novel classroom projection lamp |
| CN108766067A (en) * | 2018-08-03 | 2018-11-06 | 青岛华师京城网络科技有限公司 | A kind of implementation method in contact classroom |
| CN109522846B (en) * | 2018-11-19 | 2020-08-14 | 深圳博为教育科技有限公司 | Standing monitoring method, device, server and standing monitoring system |
| CN109522846A (en) * | 2018-11-19 | 2019-03-26 | 深圳博为教育科技有限公司 | One kind is stood up monitoring method, device, server and monitoring system of standing up |
| CN109672836A (en) * | 2018-12-28 | 2019-04-23 | 黑龙江工业学院 | A kind of English study computer recording apparatus |
| CN109635787B (en) * | 2019-01-22 | 2022-09-30 | 合肥市云联鸿达信息技术有限公司 | Tracking camera teaching system |
| CN109635787A (en) * | 2019-01-22 | 2019-04-16 | 合肥市云联鸿达信息技术有限公司 | A kind of tracking camera shooting tutoring system |
| CN110021033A (en) * | 2019-02-22 | 2019-07-16 | 广西师范大学 | A kind of method for tracking target based on the twin network of pyramid |
| CN110021033B (en) * | 2019-02-22 | 2023-05-30 | 新疆交投科技有限责任公司 | Target tracking method based on pyramid twin network |
| CN112446241A (en) * | 2019-08-29 | 2021-03-05 | 阿里巴巴集团控股有限公司 | Method and device for obtaining characteristic information of target object and electronic equipment |
| CN110933316A (en) * | 2019-12-12 | 2020-03-27 | 苏州杰胜通信息技术有限公司 | Teacher tracking teaching system based on double-camera interactive mode |
| CN111652045A (en) * | 2020-04-17 | 2020-09-11 | 西北工业大学太仓长三角研究院 | Classroom teaching quality assessment method and system |
| CN113763760A (en) * | 2020-06-02 | 2021-12-07 | 重庆艾艺荷马教育科技股份有限公司 | Multimedia fine arts teaching equipment based on internet |
| CN111835969A (en) * | 2020-07-06 | 2020-10-27 | 海信视像科技股份有限公司 | Interactive method for controlling angle of camera and display equipment |
| CN111754830A (en) * | 2020-07-07 | 2020-10-09 | 广西师范大学漓江学院 | Interactive teaching instrument for vocal music teaching |
| CN112804487A (en) * | 2020-12-30 | 2021-05-14 | 济南和普威视光电技术有限公司 | Double-path video target tracking method and system |
| CN112911150A (en) * | 2021-01-29 | 2021-06-04 | 广州合易威视信息科技有限公司 | Automatic snapshot method for high-definition human face in target area |
| CN113055604A (en) * | 2021-04-01 | 2021-06-29 | 四川新视创伟超高清科技有限公司 | Optimal visual angle video processing system and method based on 8K video signal and AI technology |
| CN113572965A (en) * | 2021-08-06 | 2021-10-29 | 广州市奥威亚电子科技有限公司 | Double-blackboard-writing tracking shooting method and device and shooting system |
| CN113910815A (en) * | 2021-11-29 | 2022-01-11 | 深圳市卓翼科技股份有限公司 | Integrated form blackboard |
| CN114245146A (en) * | 2021-12-02 | 2022-03-25 | 北京鸿合爱学教育科技有限公司 | Display picture switching method, device, equipment and computer readable storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103093654B (en) | 2014-12-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103093654B (en) | Double video camera interactive intelligent tracking teaching system | |
| CN105049764B (en) | A kind of geography teaching map based on multiple positioning shooting heads is as tracking and system | |
| CN102291569B (en) | Double-camera automatic coordination multi-target eagle eye observation system and observation method thereof | |
| CN103905734A (en) | Method and device for intelligent tracking and photographing | |
| CN105931263B (en) | A kind of method for tracking target and electronic equipment | |
| CN107392120B (en) | Attention intelligent supervision method based on sight line estimation | |
| CN109284737A (en) | A kind of students ' behavior analysis and identifying system for wisdom classroom | |
| CN105830426B (en) | A kind of video generation method and device of video generating system | |
| CN201845345U (en) | Facial expression identifying data collecting system based on active vision | |
| CN105892642A (en) | Method and device for controlling terminal according to eye movement | |
| CN106791485A (en) | The changing method and device of video | |
| CN107452018B (en) | Speaker tracking method and system | |
| CN108010394A (en) | A kind of virtual instruction method based on VR, control terminal, virtual teaching system | |
| CN105578044A (en) | Panoramic view adaptive teacher image analysis method | |
| CN104574359A (en) | Student tracking and positioning method based on primary and secondary cameras | |
| CN103677274A (en) | Interactive projection method and system based on active vision | |
| CN114299390A (en) | Method and device for determining maintenance component demonstration video and safety helmet | |
| CN101895685A (en) | Video capture control device and method | |
| CN103150552A (en) | Driving training management method based on people counting | |
| CN106815556B (en) | A kind of plane crowd hazards data collecting system of more data types | |
| CN107909598A (en) | A kind of moving object detection and tracking method based on interprocess communication | |
| Huang et al. | One-shot imitation drone filming of human motion videos | |
| CN106941580B (en) | The method and system that teacher student automatically tracks is realized based on single detective camera lens | |
| CN108876824A (en) | Method for tracking target, device, system and ball machine | |
| CN106934840A (en) | One kind education cloud class outdoor scene drawing generating method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |