CN110348427A - A kind of face hand-written input system and method based on Image Acquisition - Google Patents
A kind of face hand-written input system and method based on Image Acquisition Download PDFInfo
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- CN110348427A CN110348427A CN201910666364.6A CN201910666364A CN110348427A CN 110348427 A CN110348427 A CN 110348427A CN 201910666364 A CN201910666364 A CN 201910666364A CN 110348427 A CN110348427 A CN 110348427A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/30—Writer recognition; Reading and verifying signatures
- G06V40/37—Writer recognition; Reading and verifying signatures based only on signature signals such as velocity or pressure, e.g. dynamic signature recognition
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Abstract
A kind of face hand-written input system based on Image Acquisition, including input panel, input equipment, processing unit and the server platform for storing handwriting input content.Coordinate points are set in input panel and form input coordinate system, the writing surface contacted when input equipment includes hand-written operation with input panel, pressure sensor, image acquisition device include the anchor point on writing surface outer in the image acquisition device visual field.Processing unit receives the image information of image acquisition device, calculates handwriting input content and is sent to server platform.The present invention has many advantages, such as that written handwriting reducing degree is high, it is extensive to write scene.
Description
Technical field
The present invention relates to computer interaction handwriting input field, especially a kind of face handwriting input systems based on Image Acquisition
System and method.
Background technique
With the development of hand-written electric equipment, hand-write input function is applied to various aspects to replace traditional paper pen book
It writes, such as electronic signature, electronic painting.In education sector, the appearance of smart classroom system and learning system is advanced with no paper at all
With the intelligentized development of education, resource has not only been saved, moreover it is possible to the classroom blackboard-writing of teacher and the operation performance of student are recorded,
Effectively improve the quality of education.However, hand-written input system used by existing smart classroom system and learning system is logical
It is often the hand-written input system for the touch-induction-type for needing to cooperate electronic curtain that could use, not only equipment cost is high, easy
Damage, also has certain negative effect using eyesight of the electronic curtain to user for a long time.There are also the prior arts to use camera shooting
Head is acquired handwritten content.
But in the prior art, the either hand-written input system of touch-induction-type, or use camera collection image
Hand-written input system, the mode of electronic handwriting input is to record the motion profile of hand-written pen tip to be formed by line.This
Kind of data acquisition modes only record the position of the point of hand-written pen tip, and than the contact with writing medium are face when really writing, no
The contact surface of similar shape will form different person's handwritings, result in writing effect and use traditional writing implement that the prior art is inputted
It is different.Although can by the reading of writing pencil pressure sensor or the person's handwriting of other algorithm calculating simulations, its with it is true
Real writing effect still has deviation, is unfavorable for that student is guided to establish the correct cognition for writing text in learning process.
Summary of the invention
In view of the above deficiencies of the prior art, the purpose of the present invention is to provide a kind of face hand based on Image Acquisition
Write input system and method.
A kind of face hand-written input system based on Image Acquisition includes input panel, input equipment, processing unit and storage
The server platform of handwriting input content.Lattice arrangement setting has the coordinate points of unique code in input panel, forms input
Coordinate system.Writing surface, pressure sensor, the one or more images contacted when input equipment includes hand-written operation with input panel
Collector.At least two anchor points in the image acquisition device visual field comprising not being overlapped on writing surface outer.Processing unit receives figure
As the image information of collector, calculates handwriting input content and be sent to server platform.
Further, writing surface generates traditional hand-written effect when contacting input panel in input panel: leaving ink marks
Or other visual written traces, or the existing ink marks of erasing or written trace.
Further, input equipment and processing unit are integrated.Alternatively, the input equipment is by acquired image
Information and/or pressure sensor data are transferred to processing unit by wireless communication.
Further, server platform is internet cloud platform.
A kind of face hand-written inputting method based on Image Acquisition is as follows:
It establishes and stores handwriting input corresponding with input panel coordinate system space.When writing surface contacts and pressure with input panel
When sensor reading reaches threshold value, the continuous image of image collecting device Quick Acquisition.Processing unit receives image acquisition device
Image, the position between coordinate points on the anchor point of the writing surface according to included in image information and surrounding input panel
Set the coordinate that relationship calculates anchor point.
Position of the writing surface on coordinate system is calculated according to the shape of the coordinate of at least two anchor points and writing surface, size
It sets.Written trace is calculated in the position that input coordinate is fastened according to two continuous frames writing surface, continuous written trace composition is hand-written
Content.
Continuous picture frame, continuous written trace refer to contacting in a writing surface with input panel and writing surface
Pressure sensor readings reach threshold value and leave input panel or pressure sensor readings lower than connecting during threshold value to writing surface
Continuous picture frame, continuous written trace.
Server platform receives and stores handwritten content and updates accordingly handwriting input space.
Further, calculating written trace further includes logging timestamp and/or pressure sensor readings.
Further, the temporary not sent handwriting input content to server platform of processing unit local cache.
The beneficial effect of technical solution proposed by the present invention is: (1) by acquiring the image information of multiple anchor points simultaneously
The shape and size of writing surface are calculated, using when recording handwriting trace is face rather than point, can accurately be calculated simultaneously
Acquire the unique written handwriting as caused by the gesture and angulation change of writing in writing process, written handwriting reducing degree
It is high.(2) pressure sensor cooperation image collecting device work, writing can be determined when the reading of pressure sensor reaches threshold value
Contact when face and input panel are normal input, at this time in the image of image acquisition device at anchor point and writing panel
In same plane, the positional relationship of anchor point and coordinate points is simply to guarantee that the calculated result of anchor point coordinate is accurate, thus pen
Mark reduction is true.(3) image collecting device and writing panel cooperate, and writing panel is not necessarily to power supply, conveniently moving, write range
Larger and usage scenario is flexible and changeable.
Detailed description of the invention
Fig. 1 is the schematic diagram of the embodiment of the present invention 1；
Fig. 2 is the schematic diagram of the embodiment of the present invention 2；
Fig. 3 is the structural schematic diagram of input equipment in the embodiment of the present invention 2.
Detailed description of main elements:
1, input panel；2, coordinate points；3, smart pen；4, intelligence brush；5, writing surface；6, anchor point；7, image collecting device.
Specific embodiment
It is hand-written defeated to a kind of face based on Image Acquisition of the invention below with reference to Figure of description and specific embodiment
Enter system and method to be described in further details.
Embodiment 1
Face hand-written input system includes input panel 1, input equipment, processing unit and server platform.Input panel 1 is plane
Writing medium, the coordinate points 2 with unique code are arranged in the surface dot matrix of input panel 1, each coordinate points 2 is wrapped
Containing telltale mark and unique codes co-ordinates, coding form is two dimensional code or bar code.Coordinate points 2 are with the side of vertical row and column
The combination of formula equidistant arrangement, coordinate points 2 forms an input coordinate system.
Input equipment is the smart pen 3 of built-in processing unit, and smart pen 3 is connect with server platform.The built-in figure of smart pen 3
As acquisition device 7 and pressure sensor, pressure sensor reads intensity of pressure when writing surface 5 is contacted with input panel 1.Intelligence
Pen 3 writing surface 5 be it is thin-line-shaped, writing surface 5 connect ink cartridge, ink leaves ink marks along writing surface 5 when contacting with writing medium.
For image collecting device 7 towards writing surface 5, writing surface 5 is located substantially at the central region position of image collecting device 7.5 liang of writing surface
End is independent anchor point 6 respectively, and two anchor points 6 are in the visual field of image collecting device 7.
The application method in face hand-written input system described in the present embodiment is as follows:
Server platform is established and stores handwriting input corresponding with 1 coordinate system of input panel space.
The threshold value of one pressure sensor readings is set, which is that writing surface 5 leaves needed for ink marks in input panel 1
Minimum pressure.When writing surface 5 is contacted with input panel 1 and pressure sensor readings reach threshold value, image collecting device 7 is fast
Speed acquires continuous picture frame, and processing unit receives the image of image collecting device 7.
Include two positioning and at least two coordinate points 2 in same plane in image.Handling an individual frame
When image, processing unit by the unique codes of decoding coordinate points 2, learn the telltale marks of the coordinate points 2 with input panel 1
The corresponding input space of coordinate system in coordinate.According in image between anchor point 6 and coordinate points 2 including angle and distance
Positional relationship simultaneously combines ratio, and two anchor points 6 can be calculated separately out with the mode of triangulation location and are located in writing space
Coordinate.The line segment for connecting two anchor points 6 then corresponds to writing surface 5.
Written trace, continuous written trace group are calculated in the position that input coordinate is fastened according to two continuous frames writing surface 5
At handwritten content.Calculate written trace and also record corresponding timestamp and pressure sensor readings simultaneously, and according to pressure
The reading of sensor correspondingly calculates the shade of written trace, and pressure reading and color depth are positively correlated.Server platform
It receives and stores handwritten content and updates accordingly handwriting input space.
Embodiment 2
Referring to Fig. 2 and Fig. 3, the present embodiment the difference from embodiment 1 is that:
Input equipment in the present embodiment is the intelligence brush 4 that writing surface 5 is rectangle, is a kind of erasing writing equipment.What it was generated
Writing effect is original written trace and written contents in erasing input panel 1 and writing space.It, can when updating writing space
In a manner of with invalid data, initialization value covering, the mode for deleting pre action can also be used.
The generally cuboid of intelligence brush 4, one side are equipped with the writing surface 5 that can wipe ink marks material.For example, in this implementation
In example, writing surface 5 covers felt cloth, can effectively wipe the ink marks on smooth surface.The quadrangle of writing surface 5 is respectively anchor point 6,
Other four vertex of intelligence brush 4 go out image collecting device 7 is respectively set, and capture the image of corresponding anchor point 6.
Four pressure sensors are also set up in intelligence brush 4, detect four Angle Positions and input panel 1 of writing surface 5 respectively
Pressure when contact.If the pressure at only two adjacent angles reaches threshold value, corresponding image collecting device 7 starts work
Make, shape of the processing unit using the line of the anchor point at the two angles as writing surface 5 calculates written trace.If diagonal pressure
Power reaches threshold value or at least three jiaos of pressure reaches threshold value, and all image collecting devices 7 are started to work, processing unit with
The true form of writing surface 5 makees calculating written trace.
Processing unit is intelligent sound box, and intelligent sound box connects intelligence brush 4 and server platform, clothes by family wireless network
Business device platform is internet cloud platform.The temporary not sent handwriting input content to server platform of processing unit local cache.
Other constructions of face hand-written input system and application method are same as Example 1 in the present embodiment.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technology
Within, then the present invention also includes these modifications and variations.
Claims (7)
1. a kind of face hand-written input system based on Image Acquisition, including input panel and input equipment, it is characterised in that: also wrap
It includes processing unit and stores the server platform of handwriting input content；Lattice arrangement setting has unique code in input panel
Coordinate points form input coordinate system；Writing surface, the pressure sensing contacted when input equipment includes hand-written operation with input panel
Device, one or more image acquisition device include at least two positioning not being overlapped on writing surface outer in the image acquisition device visual field
Point；Processing unit receives the image information of image acquisition device, calculates handwriting input content and is sent to server platform.
2. a kind of face hand-written input system based on Image Acquisition according to claim 1, which is characterized in that the writing
Face generates traditional hand-written effect when contacting input panel in input panel: leaving ink marks or other visual writings
Trace, or the existing ink marks of erasing or written trace.
3. a kind of face hand-written input system based on Image Acquisition according to claim 1 or 2, it is characterised in that: described
Input equipment and processing unit are integrated；Or the input equipment is by acquired image information and/or pressure sensing
Device data are transferred to processing unit by wireless communication.
4. a kind of face hand-written input system based on Image Acquisition according to claim 3, which is characterized in that the service
Device platform is internet cloud platform.
5. a kind of face hand-written inputting method based on Image Acquisition, it is characterised in that: establish and store and input panel coordinate system
Corresponding handwriting input space；When writing surface is contacted with input panel and pressure sensor readings reach threshold value, Image Acquisition
The continuous image of device Quick Acquisition；Processing unit receives the image of image acquisition device, the book according to included in image information
Write the coordinate that the positional relationship between the coordinate points on the anchor point and surrounding input panel in face calculates anchor point；According to extremely
The coordinate of few two anchor points and shape, the size of writing surface calculate position of the writing surface on coordinate system；According to two continuous frames
Writing surface calculates written trace in the position that input coordinate is fastened, and continuous written trace forms handwritten content；Server platform
It receives and stores handwritten content and updates accordingly handwriting input space.
6. a kind of face hand-written inputting method based on Image Acquisition according to claim 5, which is characterized in that the calculating
Written trace further includes logging timestamp and/or pressure sensor readings.
7. a kind of face hand-written inputting method based on Image Acquisition according to claim 5 or 6, which is characterized in that processing
The temporary not sent handwriting input content to server platform of unit local cache.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910666364.6A CN110348427A (en) | 2019-07-23 | 2019-07-23 | A kind of face hand-written input system and method based on Image Acquisition |
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| CN201910666364.6A CN110348427A (en) | 2019-07-23 | 2019-07-23 | A kind of face hand-written input system and method based on Image Acquisition |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111914714A (en) * | 2020-07-24 | 2020-11-10 | 深圳市鹰硕教育服务股份有限公司 | Lattice book interaction method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106484151A (en) * | 2016-09-29 | 2017-03-08 | 武汉工程大学 | Based on the collection of micro- diagram data and smart pen system and the control method of artificial intelligence technology |
| CN106778720A (en) * | 2016-11-23 | 2017-05-31 | 武汉工程大学 | A kind of system and method rebuild to hand-written digitized process record and electronization |
-
2019
- 2019-07-23 CN CN201910666364.6A patent/CN110348427A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106484151A (en) * | 2016-09-29 | 2017-03-08 | 武汉工程大学 | Based on the collection of micro- diagram data and smart pen system and the control method of artificial intelligence technology |
| CN106778720A (en) * | 2016-11-23 | 2017-05-31 | 武汉工程大学 | A kind of system and method rebuild to hand-written digitized process record and electronization |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111914714A (en) * | 2020-07-24 | 2020-11-10 | 深圳市鹰硕教育服务股份有限公司 | Lattice book interaction method |
| CN111914714B (en) * | 2020-07-24 | 2021-05-14 | 深圳市鹰硕教育服务有限公司 | Lattice book interaction method |
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