CN108958636A - A kind of intelligence copybook device and copybook write detection method - Google Patents
A kind of intelligence copybook device and copybook write detection method Download PDFInfo
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- G—PHYSICS
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
- G06F3/0488—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures
- G06F3/04883—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures for inputting data by handwriting, e.g. gesture or text
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
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- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
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- G—PHYSICS
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- G06V10/40—Extraction of image or video features
- G06V10/46—Descriptors for shape, contour or point-related descriptors, e.g. scale invariant feature transform [SIFT] or bags of words [BoW]; Salient regional features
- G06V10/462—Salient features, e.g. scale invariant feature transforms [SIFT]
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- G09B11/00—Teaching hand-writing, shorthand, drawing, or painting
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- 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
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Abstract
The invention discloses a kind of intelligent copybook devices, including stylus, microprocessor, display module, touch control input module and wireless communication module, the microprocessor is connect with the display module, the touch control input module and the wireless communication module respectively, and the touch control input module is used to receive the stylus and touches the pressure value that touch control input module generates.The invention also discloses a kind of font write detection methods.The present invention relates to electronic technology fields, a kind of intelligence copybook device and copybook write detection method, the contour images of standard letter are shown in display module, practitioner is facilitated to copy, stylus, which is received, by touch control input module touches the pressure value generated, the stroke weight of handwriting and handwriting is shown in the corresponding position of display module, practitioner can intuitively correct according to the coincidence degree of handwriting and the contour images of standard letter when copying and write the technique of writing, it is practical, facilitate copybook practitioner therefrom to grasp the skill for finishing writing word.
Description
Technical field
The present invention relates to electronic technology field more particularly to a kind of intelligent copybook device and copybook write detection methods.
Background technique
When practicing fountain pen word, first to imitate and face afterwards.It imitates and copybook is exactly placed on exercise-book in the following, describing to copybook.
This exercising method can allow beginner to grasp the scheme structure of word quickly.And after having imitated, we can be using the side faced
Formula, is exactly practiced according to copybook, is write out the former of word as far as possible and is grown original flavor, test is our observation ability and the control to pen
Ability processed.
Face and write and imitate organic structure to be carried out, the stroke and scheme structure that word is grasped by way of imitating still are imitated not
It is purpose, only faces the marrow for having mould to have sample just really to grasp word at last write.Practice fountain pen word, does not require nothing more than stroke and knot
Structure, there are also the variations of the order of importance and emergency.Moreover, it is contemplated that be more difficult to facing to write than imitating, so, it will face to write and imitate and be combined with each other,
The two is indispensable and complementary to fountain pen word is perfected.
The prior art is contacted using groove copybook, is easy that practitioner is allowed to write out good-looking font when using copybook,
But it is once detached from copybook practitioner and is difficult to maintain the font in copybook.Entirely practice what process needed to grow very much for practitioner
Time therefrom comprehension could go out the skill for oneself finishing writing word.
Summary of the invention
In order to solve the above-mentioned technical problem, the object of the present invention is to provide a kind of intelligent copybook devices, practical, convenient
Copybook practitioner therefrom grasps the skill for finishing writing word.
In order to solve the above-mentioned technical problem, it is a further object to provide a kind of copybook write detection method, sides
Just copybook practitioner therefrom grasps the skill for finishing writing word, and specific aim improves grasp of the practitioner to font framework.
The technical scheme adopted by the invention is that: a kind of intelligence copybook device, including stylus, microprocessor, display mould
Block, touch control input module and wireless communication module, the microprocessor respectively with the display module, the touch control input module
It is connected with the wireless communication module, the touch control input module touches touch control input module generation for receiving the stylus
Pressure value, the display module be used for show standard letter contour images and shown according to the pressure value in corresponding position
The stroke weight of handwriting and the control handwriting, the wireless communication module be used for external communication of mobile terminal and
Carry out data transmission with internet, the microprocessor is for carrying out processing analysis to data.
As a further improvement of the foregoing solution, the wireless communication module includes bluetooth and WiFi.
As a further improvement of the foregoing solution, the touch control input module includes handwriting area and is arranged described hand-written
Pressure sensing cell in region, the pressure sensing cell touch the touch control input module production for detecting the stylus
Raw pressure value.
As a further improvement of the foregoing solution, the display module includes display area, and the display area is for showing
Show glyph image and display handwriting, the touch control input module fits in the display module surface, described hand-written
Region is overlapped with the display area.
As a further improvement of the foregoing solution, described device further includes voice module, the voice module with it is described micro-
Processor connection.
As a further improvement of the foregoing solution, described device further includes power module, the power module with it is described micro-
Processor connection.
A kind of copybook write detection method, suitable for such as above-mentioned intelligent copybook device, including
The font practiced and corresponding exercise item are selected, obtains and show the contour images of standard letter；
Detection touches the pressure value write and generated；
Handwriting is shown according to pressure value and shows stroke weight, obtains writing font image；
It extracts respectively and writes font characteristics of image and standard letter characteristics of image, and by SIFT algorithm process, obtain book
The evaluation of estimate for writing font architecture Yu standard letter structural similarity provides corresponding scoring and suggests.
As a further improvement of the foregoing solution, font image will be write and scoring uploads internet, with other persons of practising handwriting
Share the practice result of oneself or participates in ranking.
As a further improvement of the foregoing solution, described extract respectively writes font characteristics of image and standard letter image spy
Sign, and by SIFT algorithm process, the evaluation of estimate for writing font architecture and standard letter structural similarity is obtained, is provided corresponding
Scoring and suggestion, specifically include:
The cumulative time for writing font is obtained, extracts write font characteristics of image and standard letter characteristics of image respectively, and
By SIFT algorithm process, the similarity evaluation value for writing font and standard letter is obtained, by weighting method to similarity evaluation
Value and cumulative time are calculated, and are provided corresponding scoring and are suggested.
As a further improvement of the foregoing solution, the SIFT algorithm process comprising steps of
S1, the first scale space that font image is write in building indicates and the second scale space table of standard letter image
Show；
S2 searches for the extreme point of two images in two scale spaces；
S3 rejects unstable characteristic point, determines the characteristic point in two images；
S4 calculates a direction for each characteristic point；
S5 generates feature point description of two images, description of each scale in two images is matched,
Obtain matching result figure.
The beneficial effects of the present invention are:
A kind of intelligence copybook device shows the contour images of standard letter in display module, facilitates practitioner to copy, pass through
Touch control input module receives stylus and touches the pressure value generated, shows handwriting and writing in the corresponding position of display module
The stroke weight of writing, practitioner can be intuitively when copying according to the coincidences of handwriting and the contour images of standard letter
The technique of writing is write in degree amendment, practical, and copybook practitioner is facilitated therefrom to grasp the skill for finishing writing word.
In addition, the intelligence copybook device is also equipped with voice module, corresponding suggestion is proposed to copybook practitioner by voice,
Specific aim improves grasp of the practitioner to font framework.
Another beneficial effect of the invention is:
A kind of copybook write detection method, shows the contour images of standard letter, practitioner is facilitated to copy, and is pressed by receiving
Force value, shows the stroke weight of handwriting and handwriting, practitioner can intuitively when copying according to handwriting and
The technique of writing is write in the coincidence degree amendment of the contour images of standard letter, practical, facilitates copybook practitioner therefrom to grasp and finishes writing
The skill of word provides scoring to copybook practitioner in time and proposes corresponding suggestion, and specific aim improves practitioner to font framework
Grasp.
Detailed description of the invention
Specific embodiments of the present invention will be further explained with reference to the accompanying drawing:
Fig. 1 is a kind of intelligent copybook device circuit module frame chart of the present invention；
Fig. 2 is a kind of intelligent one structural schematic diagram of copybook Installation practice of the present invention；
Fig. 3 is a kind of copybook write detection method flow diagram of the present invention；
Fig. 4 is 8 consecutive points and neighbouring scale corresponding 9 of the test point intermediate in SIFT algorithm with it with scale
× 2 points 26 totally comparison schematic diagrams；
Fig. 5 is the characteristic point vectogram of standard letter " I " word building of the present invention；
Fig. 6 be present specification write body " I " word building characteristic point vectogram；
Fig. 7 is standard letter " I " of the present invention and the matching result figure for writing font " I ".
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.
Fig. 1 is a kind of intelligent copybook device circuit module frame chart of the present invention, referring to Fig.1, a kind of intelligence copybook device, including
Stylus, microprocessor, display module, touch control input module and wireless communication module.Wherein, microprocessor respectively with display mould
Block, touch control input module are connected with wireless communication module, and touch control input module touches touch control input module for receiving stylus
The pressure value of generation, display module are used to show the contour images of standard letter and are shown according to pressure value in corresponding position and write
Writing and the stroke weight for controlling handwriting, wireless communication module are used to carry out with external communication of mobile terminal and with internet
Data transmission, microprocessor is for carrying out processing analysis to data.
Specifically, microprocessor is 51 single-chip microcontrollers or AVR single chip or arm processor, wireless communication module include bluetooth
And WiFi, bluetooth are used to carry out Bluetooth communication connection with external mobile terminal, external mobile terminal can be with Bluetooth function
Mobile phone, plate or notebook, device can connect by bluetooth with external mobile terminal, the APP progress that device passes through terminal
Exchange and participation are practised handwriting game etc..For carrying out data transmission with internet, which can also be directly accessed mutually WiFi
Practice result is uploaded on network and is shared and participation is practised handwriting game etc. by networking.
Specifically, touch control input module includes handwriting area and the pressure sensing cell that is arranged in handwriting area, pressure
Detection unit is used to detect stylus and touches the pressure value that touch control input module generates.In the present embodiment, touch control input module is
Touch screen can be touch screens goods capacitance plate or electromagnetic screen, and pressure sensing cell is pressure sensor, can be piezoelectric type sensing
Device or piezoresistive transducer or pressure capacitance type sensor.
Specifically, display module includes display area, display area is for showing glyph image and display written word
Mark, touch control input module fit in display module surface, and the handwriting area of above-mentioned touch control input module is overlapped with display area, this
In embodiment, display module is display screen.
Specifically, the device further includes voice module, voice module is connect with microprocessor, in the present embodiment, voice mould
Block is microphone.Copybook practitioner is write font architecture to device and standard letter structure compares, and is given by voice module
Practitioner feeds back the suggestion with vigour of style in literary composition degree and the suggestion of font architecture.Practitioner can be intuitively when copying according to handwriting
The technique of writing is write in coincidence degree amendment with the contour images of standard letter, therefrom grasps the skill for finishing writing word.
Specifically, the device further includes power module, power module is connect with microprocessor, provides work electricity for the device
Source.
Fig. 2 is a kind of intelligent one structural schematic diagram of copybook Installation practice of the present invention, and referring to Fig. 2, which includes touch-control
(not shown), microprocessor 1, display screen 2, touch screen 3 and adapter 4, microprocessor 1 respectively with display screen 2 and touching
It touches screen 3 to be electrically connected, microprocessor 1 is connected to power supply by adapter 4, is powered device.
The device further includes bluetooth and WiFi, and device can access internet by WiFi, or be moved by bluetooth connection
Dynamic terminal (such as mobile phone) accesses internet, and the font for wanting practice and corresponding exercise item are selected from internet.
Display screen 2 shows the contour images of standard letter, is provided with pressure sensor (not shown) in touch screen 3,
Pressure sensor is used to detect stylus and touches the pressure value that touch screen 3 generates, and passes through 2 real-time display of display screen according to pressure value
Write stroke, the write body of microprocessor records, and write font architecture and standard letter structure are compared, pass through Mike
Wind (not shown) feeds back the suggestion with vigour of style in literary composition degree and the suggestion of font architecture to copybook practitioner.Practitioner can be intuitively
It is corrected when copying according to the coincidence degree of handwriting and the contour images of standard letter and writes the technique of writing, therefrom grasped and finish writing word
Skill.
After practice, scoring can be uploaded to internet by WiFi or mobile terminal by practitioner, be shared with others
The practice result of oneself participates in ranking.After practice, can directly it power off.
Fig. 3 is a kind of copybook write detection method flow diagram of the present invention, referring to Fig. 3, a kind of copybook write detection method, packet
It includes:
The font practiced and corresponding exercise item are selected, obtains and show the contour images of standard letter；
Detection touches the pressure value write and generated；
Handwriting is shown according to pressure value and shows stroke weight, obtains writing font image；
It extracts respectively and writes font characteristics of image and standard letter characteristics of image, and by SIFT algorithm process, obtain book
The evaluation of estimate for writing font architecture Yu standard letter structural similarity provides corresponding scoring and suggests.
In the present embodiment, font write detection method further include: font image will be write and scoring is uploaded to internet, with
Other persons of practising handwriting share the practice structure of oneself or participate in ranking.
Wherein, it extracts respectively and writes font characteristics of image and standard letter characteristics of image, and by SIFT algorithm process, obtain
To the evaluation of estimate for writing font architecture and standard letter structural similarity, provides corresponding scoring and suggest, specifically include: obtaining
The cumulative time of font is write, extracts write font characteristics of image and standard letter characteristics of image respectively, and pass through SIFT algorithm
Processing obtains the similarity evaluation value for writing font and standard letter, by weighting method to similarity evaluation value and cumulative time
It is calculated, provide corresponding scoring and is suggested.
Wherein, SIFT algorithm process comprising steps of
S1, the first scale space that font image is write in building indicates and the second scale space table of standard letter image
Show；
S2 searches for the extreme point of two images in two scale spaces；
S3 rejects unstable characteristic point, determines the characteristic point in two images；
S4 calculates a direction for each characteristic point；
S5 generates feature point description of two images, description of each scale in two images is matched,
Obtain matching result figure.
Wherein, step S1 specifically: the first scale space that font image is write in building indicates and standard letter image
Second scale space indicates, L (x, y, σ) be defined as original image I (x, y) and a variable dimension two-dimensional Gaussian function G (x,
Y, σ) convolution algorithm, it is defined as follows:
L (x, y, σ)=G (x, y, σ) * I (x, y) (1)
Wherein, G (x, y, σ) is changeable scale Gaussian function:
σ is the scale space factor, and value size determines the smoothness of image, the general picture feature of large scale correspondence image,
The minutia of small scale correspondence image.Big σ value corresponds to coarse scale (low resolution), conversely, corresponding fine dimension (high score
Resolution).
In order to effectively detect stable characteristic point, Gaussian difference scale space (DOG scale- in scale space
Space) are as follows:
Wherein, k is fixed coefficient.
Gaussian convolution image subtracts each other two-by-two after obtaining Gauss difference image, can carry out the process for seeking extreme value.
S2 searches for the extreme point of two images in two scale spaces, specifically: by each picture in Gauss difference image
Compared with element has 26 pixels altogether with its neighborhood, the neighborhood of its corresponding upper tomographic image, the neighborhood of corresponding next tomographic image, figure
4 be that with 8 consecutive points of scale and neighbouring scale, corresponding 9 × 2 points are total with it for test point intermediate in SIFT algorithm
26 comparison schematic diagrams find the extreme point of scale space, the consecutive points that each sampled point will be all with it referring to Fig. 4
Compare, sees whether it is bigger than the consecutive points of its image area and scale domain or small.Intermediate test point is with it with 8 of scale
Totally 26 points compare for consecutive points and corresponding 9 × 2 points of neighbouring scale, to ensure in scale space and two dimensional image space
All detect extreme point.If a point is maximum or most in DOG this layer of scale space and bilevel 26 fields
When small value, which is a characteristic point of the image under the scale.
S3 rejects unstable characteristic point, determines the characteristic point in two images, specifically, three-dimensional secondary by fitting
Function removes the key point and unstable skirt response of low contrast accurately to determine position and the scale of key point
Point, scale space function Taylor expansion:
Derivation is carried out to formula (4), enabling formula (4) is 0, obtains accurate position, obtains
In the characteristic point having been detected by, remove low contrast characteristic point and unstable skirt response point.
It removes the point of low contrast: formula (2) being substituted into formula (1), i.e., points out D (x) x in the extreme value of DoG Space and takes
Value, only takes first two can obtain:
IfThis feature point just remains, and otherwise abandons.
The removal of skirt response: an extreme value for defining incorrect difference of Gaussian the place across edge have compared with
Big principal curvatures, and have lesser principal curvatures in the direction of vertical edge.Principal curvatures passes through one 2 × 2 Hessian matrix H
It finds out:
Derivative is obtained by the adjacent difference estimation of sampled point.
The principal curvatures of D and the characteristic value of H are directly proportional, and enabling α is larger characteristic value, and β is lesser characteristic value, then:
Tr (H)=Dxx+Dyy=alpha+beta (8)
Det (H)=DxxDyy-(Dxy)2=α β (9)
α=γ β is enabled, then
(r+1)2The value of/r is minimum when two characteristic values are equal, increases with the increase of r, therefore, in order to examine
Principal curvatures is surveyed whether at certain thresholding r, only needs to detect
(if alpha+beta)/α β > (r+1)2/ r then removes this feature point.
S4 calculates a direction for each characteristic point, specifically includes and calculate a direction for each characteristic point, according to this
Direction is further to be calculated, and is each key point assigned direction ginseng using the gradient direction distribution characteristic of key point neighborhood territory pixel
Number,
θ (x, y)=α tan2 ((L (x, y+1)-L (x, y-1))/(L (x+1, y)-L (x-1, y))) (13)
Wherein, m (x, y) is the modulus value of gradient at (x, y), and θ (x, y) is the direction formula at (x, y), and L is each key
Scale where point is respective.
Fig. 5 is the characteristic point vectogram of standard letter " I " word of the present invention building, and Fig. 6 is that present specification is write body " I " word
The characteristic point vectogram of building, Fig. 7 be standard letter " I " of the present invention and write font " I " matching result figure, in conjunction with Fig. 5,
Fig. 6 and Fig. 7, arrow are indicated the feature vector of some key point in image, are made using the Euclidean distance of key point feature vector
It is measured for the similarity determination of key point in two images, and then obtains writing the similarity evaluation value of font and standard letter,
Similarity evaluation value and cumulative time are calculated by weighting method, provide corresponding scoring and suggested.
Overall assessment W is calculated according to similarity evaluation value M and cumulative time T:
Wherein, K1 is similarity flexible strategy, and K2 is cumulative time flexible strategy.
A kind of copybook write detection method, shows the contour images of standard letter, practitioner is facilitated to copy, and is pressed by receiving
Force value, shows the stroke weight of handwriting and handwriting, practitioner can intuitively when copying according to handwriting and
The technique of writing is write in the coincidence degree amendment of the contour images of standard letter, practical, facilitates copybook practitioner therefrom to grasp and finishes writing
The skill of word provides scoring to copybook practitioner in time and proposes corresponding suggestion, and specific aim improves practitioner to font framework
Grasp.
It is to be illustrated to preferable implementation of the invention, but the invention is not limited to the implementation above
Example, those skilled in the art can also make various equivalent variations on the premise of without prejudice to spirit of the invention or replace
It changes, these equivalent deformations or replacement are all included in the scope defined by the claims of the present application.
Claims (10)
1. a kind of intelligence copybook device, which is characterized in that it includes stylus, microprocessor, display module, touch control input module
And wireless communication module, the microprocessor respectively with the display module, the touch control input module and the wireless communication
Module connection, the touch control input module is used to receive the stylus and touches the pressure value that touch control input module generates, described
Display module is used to show the contour images of standard letter and shows handwriting and control in corresponding position according to the pressure value
The stroke weight of the handwriting is made, the wireless communication module is used to carry out with external communication of mobile terminal and with internet
Data transmission, the microprocessor is for carrying out processing analysis to data.
2. a kind of intelligent copybook device according to claim 1, which is characterized in that the wireless communication module includes bluetooth
And WiFi.
3. a kind of intelligent copybook device according to claim 2, which is characterized in that the touch control input module includes hand-written
Region and the pressure sensing cell being arranged in the handwriting area, the pressure sensing cell is for detecting the touch-control style of writing
Touch the pressure value that the touch control input module generates.
4. a kind of intelligent copybook device according to claim 3, which is characterized in that the display module includes viewing area
Domain, for showing glyph image and display handwriting, the touch control input module fits in described for the display area
Display module surface, the handwriting area are overlapped with the display area.
5. a kind of intelligent copybook device according to any one of claims 1 to 4, which is characterized in that described device further includes
Voice module, the voice module are connect with the microprocessor.
6. a kind of intelligent copybook device according to claim 5, which is characterized in that described device further includes power module,
The power module is connect with the microprocessor.
7. a kind of copybook write detection method is suitable for such as intelligent copybook device as claimed in any one of claims 1 to 6, spy
Sign is comprising
The font practiced and corresponding exercise item are selected, obtains and show the contour images of standard letter；
Detection touches the pressure value write and generated；
Handwriting is shown according to pressure value and shows stroke weight, obtains writing font image；
It extracts respectively and writes font characteristics of image and standard letter characteristics of image, and by SIFT algorithm process, obtain written word
The evaluation of estimate of body structure and standard letter structural similarity provides corresponding scoring and suggests.
8. a kind of font write detection method according to claim 7, which is characterized in that font image and scoring will be write
Internet is uploaded, the practice result of oneself is shared with other persons of practising handwriting or participates in ranking.
9. a kind of font write detection method according to claim 8, which is characterized in that described extract respectively writes font
Characteristics of image and standard letter characteristics of image, and by SIFT algorithm process, it obtains writing font architecture and standard letter structure
The evaluation of estimate of similarity provides corresponding scoring and suggests, specifically includes:
The cumulative time for writing font is obtained, extracts write font characteristics of image and standard letter characteristics of image respectively, and pass through
SIFT algorithm process obtains the similarity evaluation value for writing font and standard letter, by weighting method to similarity evaluation value and
Cumulative time is calculated, and is provided corresponding scoring and is suggested.
10. a kind of font write detection method according to claim 9, which is characterized in that the SIFT algorithm process packet
Include step:
S1, the first scale space that font image is write in building indicates and the second scale space of standard letter image indicates；
S2 searches for the extreme point of two images in two scale spaces；
S3 rejects unstable characteristic point, determines the characteristic point in two images；
S4 calculates a direction for each characteristic point；
S5 generates feature point description of two images, description of each scale in two images is matched, is obtained
Matching result figure.
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| CN201810885001.7A CN108958636A (en) | 2018-08-06 | 2018-08-06 | A kind of intelligence copybook device and copybook write detection method |
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| CN201810885001.7A CN108958636A (en) | 2018-08-06 | 2018-08-06 | A kind of intelligence copybook device and copybook write detection method |
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Cited By (7)
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| CN110796065A (en) * | 2019-10-26 | 2020-02-14 | 深圳市锦上科技有限公司 | Calligraphy practicing scoring method and system based on image recognition and computer readable medium |
| CN111047927A (en) * | 2019-12-31 | 2020-04-21 | 六安中达信息科技有限公司 | Writing device capable of judging writing order |
| CN111340810A (en) * | 2020-05-21 | 2020-06-26 | 深圳市儿童医院 | Intelligent evaluation method for Chinese character writing quality |
| CN111746193A (en) * | 2020-06-19 | 2020-10-09 | 深圳千舟云格科技有限公司 | Management method and management system based on drawing paper |
| CN113326727A (en) * | 2021-03-05 | 2021-08-31 | 临沂大学 | Demonstration method and device for calligraphy teaching |
| CN114332514A (en) * | 2022-03-17 | 2022-04-12 | 北京许先网科技发展有限公司 | Font evaluation method and system |
| CN115854886A (en) * | 2022-12-22 | 2023-03-28 | 宁波宁兴精密制造有限公司 | Automobile central channel formwork shaping rib deformation detection device |
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| CN114332514A (en) * | 2022-03-17 | 2022-04-12 | 北京许先网科技发展有限公司 | Font evaluation method and system |
| CN114332514B (en) * | 2022-03-17 | 2022-06-07 | 北京许先网科技发展有限公司 | Font evaluation method and system |
| CN115854886A (en) * | 2022-12-22 | 2023-03-28 | 宁波宁兴精密制造有限公司 | Automobile central channel formwork shaping rib deformation detection device |
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