CN110276427A - A kind of calligraphy teaching broadcast relay system and relaying method based on two dimensional code positioning - Google Patents
A kind of calligraphy teaching broadcast relay system and relaying method based on two dimensional code positioning Download PDFInfo
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- CN110276427A CN110276427A CN201910602512.8A CN201910602512A CN110276427A CN 110276427 A CN110276427 A CN 110276427A CN 201910602512 A CN201910602512 A CN 201910602512A CN 110276427 A CN110276427 A CN 110276427A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
- G06K17/0022—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device
- G06K17/0025—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device the arrangement consisting of a wireless interrogation device in combination with a device for optically marking the record carrier
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B5/00—Electrically-operated educational appliances
- G09B5/02—Electrically-operated educational appliances with visual presentation of the material to be studied, e.g. using film strip
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B5/00—Electrically-operated educational appliances
- G09B5/08—Electrically-operated educational appliances providing for individual presentation of information to a plurality of student stations
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Abstract
The invention discloses a kind of calligraphy teaching broadcast relay systems and relaying method based on two dimensional code positioning, and system includes camera, camera bracket, two dimensional code positioning plate and computer；Its relaying method include the following steps: a), shooting original image；B), original image is transmitted；C), correct original image and d), play image.The present invention is using two dimensional code positioning plate as master, using the rectangle two dimensional code sheet frame set in image flame detection device as correction version, four two dimensional codes of four two dimensional codes of original image and rectangle two dimensional code sheet frame are compared correction by the image flame detection device of computer by the original image of camera shooting, keep master and four two dimensional codes of the upper left two dimensional code of correction version, upper right two dimensional code, lower-left two dimensional code and bottom right two dimensional code be overlapped one by one, complete the correction of image, and teaching point is sent to by the Ethernet interface of computer, realize that the calligraphy teaching of two dimensional code positioning is relayed.The present invention can effectively overcome camera to have structure simple, easy to operate, the accurate advantage of frame stabilization due to tilting the defect for causing picture to deform, the accurate real picture information for obtaining and propagating two dimensional code positioning plate.
Description
Technical field
The present invention relates to Web-based instruction technical fields, for the undistorted propagation of calligraphy, drawing teaching, especially a kind of base
In the calligraphy teaching broadcast relay system and relaying method of two dimensional code positioning.
Technical background
With the development of information technology, the teaching method of online teaching is favored by vast online teaching mechanism.It is straight on line
The writing on the blackboard information for needing to be acquired the person of giving lessons during broadcasting teaching using apparatus for making a video recording is given lessons especially for calligraphy or drawing,
It is very high to the distortion factor requirement of control picture transmission, even there are small distortion song will be caused to the original idea of calligraphy or drawing
Solution, causes the marrow of calligraphy or drawing that cannot accurately express.The problem is that the apparatus for making a video recording that the prior art uses does not have
The erection angle of the function of having automatically-perspective to convert, i.e. camera is different, and captured image information generates different degrees of change
Shape, this deformation will directly reduce the teaching efficiency that network calligraphy or drawing are given lessons.How in Image Acquisition, the process of propagation
In, original image is once accurately corrected as carrying out, it can be to avoid due to perspective view difference bring image error or even causing
The collimation error, it is ensured that the marrow of calligraphy or drawing also can be expressed accurately during online teaching, greatly improve network book
The effect of method or drawing teaching.
Summary of the invention
The purpose of the present invention is in view of the deficiencies of the prior art and provide it is a kind of based on two dimensional code positioning calligraphy teaching
Broadcast relay system and relaying method, the present invention are led due to camera shoots seat in the plane using two dimensional code positioning plate as master
Anamorphose is caused, correction version, the original image that camera is shot are used as by the rectangle two dimensional code sheet frame set in image flame detection device
It is transmitted to computer, is saved by the video memory of computer, by image flame detection device by four two dimensional codes and rectangle of original image
Four two dimensional codes of two dimensional code sheet frame compare correction, make master and correct upper left two dimensional code, upper right two dimensional code, the lower-left two dimension of version
Four two dimensional codes of code and bottom right two dimensional code are overlapped one by one, complete the correction of image, and sent by the Ethernet interface of computer
To teaching point, realize that the calligraphy teaching of two dimensional code positioning is relayed.The present invention can effectively overcome camera to lead to picture due to inclination
The defect of face deformation, the accurate real picture information for obtaining and propagating two dimensional code positioning plate, has structure simple, easy to operate,
The accurate advantage of frame stabilization.
Realizing the specific embodiment of the object of the invention is:
A kind of calligraphy teaching broadcast relay system based on two dimensional code positioning, feature include that camera, camera bracket, two dimensional code are fixed
Position plate and computer；
The camera is equipped with blue tooth interface and USB interface；
The camera bracket is general tripod；
The two dimensional code positioning plate is the rectangular slab of plurality of specifications, is respectively equipped with four different two dimensions on four angles of rectangular slab
Code is followed successively by upper left two dimensional code, upper right two dimensional code, lower-left two dimensional code and bottom right two dimensional code, removes four two dimensions on rectangular slab
The region of code is to write area；
The computer peripheral equipment data-interface and Ethernet interface, it is interior to be equipped with video memory and image flame detection device,
The rectangle two dimensional code sheet frame of more specifications identical with two dimensional code positioning plate, and rectangle two dimension are equipped in described image rectifier
Upper left identical with two dimensional code positioning plate two dimensional code, upper right two dimensional code, lower-left two dimensional code are respectively equipped on four angles of code sheet frame
And bottom right two dimensional code；
The camera is set on camera bracket, and the USB interface of camera and the data-interface of computer connect through data line
It connects；The original image of camera acquisition is transmitted to computer by data line, and computer sends the image of correction through Ethernet interface
To teaching point.
A kind of calligraphy teaching relaying method based on two dimensional code positioning, it is characterized in that, this method comprises the following steps:
A), original image is shot
Camera is set on camera bracket, the writing brush word sample book for being intended to relay writes on two dimensional code positioning plate, by camera
It is shot, obtains original image；
B), original image is transmitted
The data-interface of the USB interface of camera and computer is connected through data line, by the original image of camera shooting through number
It is transmitted to computer according to line, is saved by the video memory of computer；
C), original image is corrected
Original image in video memory is delivered to image flame detection device, image flame detection device is selected and the same rule of two dimensional code positioning plate
The two dimensional code sheet frame of lattice, the two dimensional code on four angles of image flame detection device moving 2 D code positioning plate, makes on two dimensional code positioning plate
Four two dimensional codes are be overlapped one by one with the two dimensional code at four angles on two dimensional code sheet frame respectively, and original image correction is completed；
D), image is played
Image after the completion of correction is sent to teaching point through the Ethernet interface of computer, realizes the calligraphy religion of two dimensional code positioning
It learns and relays.
The present invention uses two dimensional code positioning plate as master, using the rectangle two dimensional code sheet frame conduct set in image flame detection device
Version is corrected, the original image that camera is shot is transmitted to computer, is saved by the video memory of computer, by image flame detection device
Four two dimensional codes of four two dimensional codes of original image and rectangle two dimensional code sheet frame are compared into correction, make master and correct the upper left of version
Two dimensional code, upper right two dimensional code, lower-left two dimensional code and bottom right two dimensional code four two dimensional codes be overlapped one by one, complete the correction of image,
And teaching point is sent to by the Ethernet interface of computer, realize that the calligraphy teaching of two dimensional code positioning is relayed.The present invention can have
Effect overcomes camera to believe due to tilting the defect for causing picture to deform, accurate obtain with the real picture for propagating two dimensional code positioning plate
Breath has structure simple, easy to operate, the accurate advantage of frame stabilization.
Detailed description of the invention
Fig. 1 is system schematic of the invention；
Fig. 2 is the schematic diagram of the original image of camera of the present invention shooting；
Fig. 3 is correcting image schematic diagram of the present invention after computer completes correction.
Specific embodiment
Refering to fig. 1, system of the invention includes camera 1, camera bracket 2, two dimensional code positioning plate 3 and computer 4；
The camera 1 is equipped with blue tooth interface and USB interface；
The camera bracket 2 is general tripod；
The two dimensional code positioning plate 3 is the rectangular slab of plurality of specifications, is respectively equipped with four different two on four angles of rectangular slab
Code is tieed up, upper left two dimensional code 31, upper right two dimensional code 32, lower-left two dimensional code 33 and bottom right two dimensional code 34 is followed successively by, is removed on rectangular slab
The region for removing four two dimensional codes is to write area；
The 4 peripheral data interface of computer and Ethernet interface, it is interior to be equipped with video memory and image flame detection device,
The rectangle two dimensional code sheet frame 41 of more specifications identical with two dimensional code positioning plate 3, and rectangle are equipped in described image rectifier
Be respectively equipped on four angles of two dimensional code sheet frame 41 upper left identical with two dimensional code positioning plate 3 two dimensional code 31, upper right two dimensional code 32,
Lower-left two dimensional code 33 and bottom right two dimensional code 34；
The camera 1 is set on camera bracket 2, and the USB interface of camera 1 and the data-interface of computer 4 are through data line
Connection；The original image that camera 1 acquires is transmitted to computer 4 by data line, and computer 4 is by the image of correction through Ethernet interface
It is sent to teaching point.
Present invention teaching relaying method includes the following steps:
A), original image is shot
Refering to fig. 1, camera 1 is set on camera bracket 2 by Fig. 2, and the writing brush word sample book for being intended to relay writes on two dimensional code positioning
It on plate 3, is shot by camera 1, obtains original image；
B), original image is transmitted
Refering to fig. 1, the USB interface of camera 1 is connect with the data-interface of computer 4 through data line by Fig. 2, by camera 1
The original image of shooting is transmitted to computer 4 through data line, is saved by the video memory of computer 4；
C), original image is corrected
Refering to fig. 1, the original image in video memory is delivered to image flame detection device by Fig. 3, and image flame detection device is selected and two dimensional code
The two dimensional code sheet frame 41 of the same specification of positioning plate 3, the two dimensional code on 3 four angles of image flame detection device moving 2 D code positioning plate, makes
Respectively with two dimensional code sheet frame 41, the two dimensional code at upper four angles is overlapped one by one for four two dimensional codes on two dimensional code positioning plate 3, original image
Correction is completed；
D), image is played
Refering to fig. 1, the image after the completion of correction is sent to teaching point through the Ethernet interface of computer 4, realizes two dimension by Fig. 3
The calligraphy teaching of code positioning is relayed.
The course of work of the invention
Refering to fig. 1, when the invention works, the specification of two dimensional code positioning plate 3 is set first as the rectangular slab of 1:1 or 9:16, rectangle
Four different two dimensional codes are respectively equipped on four angles of plate, are followed successively by upper left two dimensional code 31, upper right two dimensional code 32, lower-left two
Code 33 and bottom right two dimensional code 34 are tieed up, the region that four two dimensional codes are removed on rectangular slab is to write area.
The specification of two dimensional code sheet frame 41 in image flame detection device is set as the rectangular plate-and-frame of 1:1 or 9:16, and rectangle two dimensional code
Upper left identical with two dimensional code positioning plate 3 two dimensional code 31, upper right two dimensional code 32, lower-left two are respectively equipped on four angles of sheet frame 41
Tie up code 33 and bottom right two dimensional code 34, it is ensured that the image after original image and correction is in scaling in proportion, after the completion of setting, implements step
It is rapid as follows:
A), original image is shot
Refering to fig. 1, camera 1 is set on camera bracket 2 by Fig. 2, and the writing brush word sample book for being intended to relay writes on two dimensional code positioning
It on plate 3, is shot by camera 1, obtains original image；At this point, the seat in the plane when camera 1 cannot be located with two dimensional code positioning plate 3
When the angle of orthographic projection, original image obtained can be deformed.
B), original image is transmitted
Refering to fig. 1, the USB interface of camera 1 is connect with the data-interface of computer 4 through data line by Fig. 2, by camera 1
The original image of shooting is transmitted to computer 4 through data line, is saved by the video memory of computer 4.
C), original image is corrected
Refering to fig. 1, the original image in video memory is delivered to image flame detection device by Fig. 3, and image flame detection device is selected and two dimensional code
The same specification of positioning plate 3 is the two dimensional code sheet frame 41 of 1:1, and the identification of image flame detection device is simultaneously on 3 four angles of moving 2 D code positioning plate
Two dimensional code, make four two dimensional codes on two dimensional code positioning plate 3 respectively with the two dimensional code at four angles on two dimensional code sheet frame 41 one by one
Overlapping, original image correction are completed；
D), image is played
Refering to fig. 1, the image after the completion of correction is sent to teaching point through the Ethernet interface of computer 4, realizes two dimension by Fig. 3
The calligraphy teaching of code positioning is relayed.
The process of computer correction original image of the present invention is as follows:
Camera 1 is successively arranged upper left two dimensional code 31, upper right two dimensional code 32, lower-left two dimensional code by obtaining on two dimensional code positioning plate 3
33 and 34 4 two dimensional codes of bottom right two dimensional code image, i.e. original image, and original image is transferred to computer 4, computer 4 can be with
The information of each two dimensional code: the coordinate of four angle points of the coding and two dimensional code of two dimensional code is recognized respectively；
Computer obtains two dimensional code recognizer of the two dimensional code based on aruco+python+opencv；
gray=cv2.COLOR(img,cv2.COLOR _BGR2GRAY)
corners, ids, rejectedImgPoints=aruco.detectMarkers(gray,self.dictionary,
parameters=self.parameters)
Wherein img is the original image comprising four two dimensional codes, and gray is the grayscale image being transformed by original image, and corners is
The coordinate on four vertex of each two dimensional code, ids are the number of each two dimensional code, information pair included in corners and ids
It answers, it can be by the upper left two dimensional code on coordinate in corners and two dimensional code positioning plate 3 by each number in comparison ids
31,34 4 upper right two dimensional code 32, lower-left two dimensional code 33 and bottom right two dimensional code two dimensional codes are matched one by one.
Thus computer can obtain upper left two dimensional code 31, upper right two dimensional code 32, lower-left two dimensional code 33 and bottom right two dimensional code
34 coordinate, and the algorithm for image flame detection being carried out in these information input image flame detection devices, image flame detection device are based on OpenCV+
The image flame detection algorithm of python: pts1=np.float32 ([[x1, y1], [x2, y2], [x3, y3], [x4,
y4]])
pts2 = np.float32([[0, 0],[W_cols, 0], 0, H_rows], [W_cols, H_rows]] M =
cv2.getPerspectiveTransform(pts1, pts2)
new_img = cv2.warpPerspective(img, M, (W_cols, H_rows))
The upper right that wherein [x1, y1] is the bottom right angular coordinate of the two dimensional code in original image, [x2, y2] is two dimensional code in original image
Angular coordinate block B, [x3, y3] are the lower-left angular coordinate of two dimensional code in original image, the left side that [x4, y4] is two dimensional code in original image
Upper angular coordinate.It is Target Photo height that W_cols, which is Target Photo width, H_rows, img is original image, new_img be by
The correcting image obtained after perspective conversion.Thus the original image that kind method obtains is that width is W_cols, is highly H_cols
And with original image be same specification rectangle picture.Original image is to be in the original image obtained by camera by image as a result,
The correcting image obtained after rectifier perspective conversion, the as front view image of fidelity.
Claims (2)
1. a kind of calligraphy teaching broadcast relay system based on two dimensional code positioning, which is characterized in that it includes camera (1), camera
Bracket (2), two dimensional code positioning plate (3) and computer (4)；
The camera (1) is equipped with blue tooth interface and USB interface；
The camera bracket (2) is general tripod；
The two dimensional code positioning plate (3) is the rectangular slab of plurality of specifications, be respectively equipped on four angles of rectangular slab four it is different
Two dimensional code is followed successively by upper left two dimensional code (31), upper right two dimensional code (32), lower-left two dimensional code (33) and bottom right two dimensional code (34),
The region that four two dimensional codes are removed on rectangular slab is to write area；
Computer (4) the peripheral data interface and Ethernet interface, it is interior to be equipped with video memory and image flame detection device,
The rectangle two dimensional code sheet frame (41) of identical more specifications with two dimensional code positioning plate (3) is equipped in described image rectifier, and
Identical upper left two dimensional code (31), the right side are respectively equipped with two dimensional code positioning plate (3) on four angles of rectangle two dimensional code sheet frame (41)
Upper two dimensional code (32), lower-left two dimensional code (33) and bottom right two dimensional code (34)；
The camera (1) is set on camera bracket (2), the USB interface of camera (1) and the data-interface of computer (4)
It is connected through data line；The original image of camera (1) acquisition is transmitted to computer (4) by data line, and computer (4) is by the figure of correction
As being sent to teaching point through Ethernet interface.
2. a kind of calligraphy teaching relaying method based on two dimensional code positioning, which is characterized in that this method comprises the following steps:
A), original image is shot
Camera (1) is set on camera bracket (2), the writing brush word sample book for being intended to relay writes on two dimensional code positioning plate (3),
It is shot by camera (1), obtains original image；
B), original image is transmitted
The USB interface of camera (1) is connect with the data-interface of computer (4) through data line, by camera (1) shooting
Original image is transmitted to computer (4) through data line, is saved by the video memory of computer (4)；
C), original image is corrected
Original image in video memory is delivered to image flame detection device, image flame detection device is selected same with two dimensional code positioning plate (3)
The two dimensional code sheet frame (41) of one specification, the two dimensional code on (3) four angles of image flame detection device moving 2 D code positioning plate, makes two dimensional code
Respectively with two dimensional code sheet frame (41), the two dimensional code at upper four angles is overlapped one by one for four two dimensional codes on positioning plate (3), and original image is rectified
It is positive to complete；
D), image is played
Image after the completion of correction is sent to teaching point through the Ethernet interface of computer (4), realizes the book of two dimensional code positioning
Method teaching is relayed.
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| CN206340173U (en) * | 2016-07-12 | 2017-07-18 | 郑鸿浩 | calligraphy teaching instrument |
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2019
- 2019-07-05 CN CN201910602512.8A patent/CN110276427A/en active Pending
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| CN1799252A (en) * | 2003-06-02 | 2006-07-05 | 卡西欧计算机株式会社 | Captured image projection apparatus and captured image correction method |
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| CN104715256A (en) * | 2015-03-04 | 2015-06-17 | 南昌大学 | Auxiliary calligraphy exercising system and evaluation method based on image method |
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Application publication date: 20190924 |