CN104182137B - A kind of method of the electronic handwriting on erasing data board - Google Patents
A kind of method of the electronic handwriting on erasing data board Download PDFInfo
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- CN104182137B CN104182137B CN201310204275.2A CN201310204275A CN104182137B CN 104182137 B CN104182137 B CN 104182137B CN 201310204275 A CN201310204275 A CN 201310204275A CN 104182137 B CN104182137 B CN 104182137B
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Abstract
The present invention relates to a kind of method for wiping the electronic handwriting on data board.The method includes：Step 1：The coordinate of each person's handwriting point on electronic handwriting is corresponded into preservation with the pressure of writing suffered by data board when writing the person's handwriting point, and the color depth of each person's handwriting point on data board is directly proportional to the pressure of writing at the person's handwriting point；Step 2：To be preserved for wiping the erasing pressure one-to-one corresponding applied to data board when the coordinate of each erasing point on the data board that the eraser of electronic handwriting is contacted passes through the erasing point with eraser；Step 3：Judge whether the coordinate of erasing point is identical with the coordinate of in person's handwriting point one by one, be that the color depth at the erasing point is then determined according to the first non-negative rule, otherwise, the color depth at the erasing point is the background color depth of data board.The present invention can improve the hommization degree and ease of use of electronic handwriting erasing.
Description
Technical field
Technical field the present invention relates to wipe the electronic handwriting on data board, on more particularly to a kind of erasing data board
Electronic handwriting method.
Background technology
With the popularization and application of computer, turned into existing so as to form electronic handwriting by writing and drawing on data board
The main flow that foundry is made.Write and mistake can be produced in drawing course unavoidably or shortcoming is left, this relates to carry out electronic handwriting
The problem of erasing.The method of the electronic handwriting on existing erasing data board is as follows：Preserve each person's handwriting point on electronic handwriting
Coordinate, then when erasing operation is performed, as long as soon as eraser contact person's handwriting point, the color depth at the person's handwriting point is reset
It is the background color depth of data board, so as to realize wiping purposes.The shortcoming of this technology is：Because erasing is irreversible mistake
Journey, color depth at any person's handwriting point is changed into background color depth and irrecoverable after an erase, by wiping in this and reality
Except and be not inconsistent the situation that the color depth at person's handwriting point shoals, and having carried out also recovering former after erasing operation by mistake
Shape, therefore, the hommization degree of prior art is poor, uses inconvenient.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of method for wiping the electronic handwriting on data board, can improve
The hommization degree and ease of use of electronic handwriting erasing.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：A kind of side of the electronic handwriting on erasing data board
Method, the method includes：
Step 1：By the coordinate of each person's handwriting point on the electronic handwriting with suffered by data board when writing the person's handwriting point
Pressure of writing correspond and preserve, and make on the data board at the color depth of each person's handwriting point and the person's handwriting point
The pressure of writing is directly proportional；
Step 2：By for wiping each erasing point on the data board that the eraser of the electronic handwriting is contacted
Coordinate and the eraser erasing pressure that the data board applies is corresponded when passing through the erasing point and preserves；
Step 3：Judge whether the coordinate of the erasing point is identical with the coordinate of in the person's handwriting point, is then one by one
Color depth at the erasing point is determined according to the first non-negative rule, otherwise, the color depth at the erasing point is the record
The background color depth of plate；
Wherein, the first non-negative rule includes：Step 3-1：This is subtracted with pressure is write described in described erasing at point
The erasing pressure at erasing point is poor so as to obtain first pressure；Step 3-2：If the first pressure difference is less than predetermined threshold
Value, then the color depth at the erasing point is the background color depth of the data board, otherwise, color depth and institute at the erasing point
First pressure difference is stated to be directly proportional.
The beneficial effects of the invention are as follows：The corresponding record of the present invention coordinate of person's handwriting point and write pressure and erasing point
Coordinate and erasing pressure, it is by the coordinate than identifying the handwriting a little and wiping point, the color depth of the two overlapping position is non-according to first
Negative rule determines, so, the color depth at person's handwriting point that is wiped free of just with write pressure subtract obtained by erasing pressure the
One pressure differential is relevant, as long as first pressure difference is not less than predetermined threshold, the color depth at the person's handwriting point is to shoal, without
It is changed into the background color depth of data board completely, the color depth of person's handwriting point only can when being subject to smaller erasing pressure in this and actual life
Shoal identical without recovering the situation of background color depth completely, therefore, hommization degree of the invention is greatly improved, and is write or is painted
The electronic handwriting of system also just has deep mixed color, more convenient to use.
On the basis of above-mentioned technical proposal, the present invention can also do following improvement：
Further, each erasing point is all corresponding with more than one erasing point of proximity, and each erasing is faced
It is right that the erasing pressure that erasing pressure near point is equal at the corresponding erasing point of the erasing point of proximity is multiplied by erasing point of proximity institute
The predefined weight value answered；
Then the step 2 also includes：By it is each it is described erasing point corresponding to it is each described erasing point of proximity coordinate with
Erasing pressure at the erasing point of proximity is corresponded；
The step 3 also includes：Judge one by one it is described erasing point of proximity coordinate whether with the person's handwriting point in one
Coordinate it is identical, be then according to the second non-negative rule determine the erasing point of proximity at color depth, otherwise, the erasing point of proximity
The color depth at place is the background color depth of the data board；
Wherein, the second non-negative rule includes：Step 3-3：Subtracted with pressure is write described in described erasing at point of proximity
The erasing pressure gone at the erasing point of proximity is poor so as to obtain second pressure；Step 3-4：If the second pressure difference is small
In the predetermined threshold, then the color depth at the erasing point of proximity is the background color depth of the data board, and otherwise, the erasing is faced
Color depth near point is poor to the second pressure to be directly proportional.
Further, the corresponding all erasing point of proximity of each erasing point constitute a predetermined style of writing sample.
Further, the predetermined threshold is 0.
Further, the data board is：Handwriting pad, or touch-screen, or display.
Brief description of the drawings
Fig. 1 is the flow chart of the method for the electronic handwriting on erasing data board proposed by the present invention；
Fig. 2 is the structure chart using system of the invention.
Specific embodiment
Principle of the invention and feature are described below in conjunction with accompanying drawing, example is served only for explaining the present invention, and
It is non-for limiting the scope of the present invention.
The present invention proposes a kind of method for wiping the electronic handwriting on data board, and the implementation of data board here is more
Plant various, for example, can be handwriting pad, or touch-screen, display etc. is can also be, as long as electronic form can be shown
Person's handwriting, may serve to as the data board in the present invention.And electronic handwriting then refers to electronically being displayed in record
Person's handwriting on plate, may come from the description on touch-screen or handwriting pad, it is also possible to come from mouse retouching over the display
Draw, etc..Electronic handwriting is made up of more than one person's handwriting point, in the present invention, the color depth of each person's handwriting point can with identical,
Can be with difference（I.e. shade differs）.
Fig. 1 is the flow chart of the method for the electronic handwriting on erasing data board proposed by the present invention.As shown in figure 1, the party
Method includes：
Step 101：By the coordinate of each person's handwriting point on electronic handwriting and writing suffered by data board when writing the person's handwriting point
Pressure is corresponded and preserved, and makes to write pressure into just at the color depth of each person's handwriting point and the person's handwriting point on data board
Than.
Electronic handwriting is from the action of writing on data board, and action of writing can produce certain pressure to data board
Power, the pressure is referred to as writing pressure in the present invention, and this writes pressure and the coordinate of person's handwriting point can be by the biography on data board
Sensor is transferred to storage device.When data board is handwriting pad or touch-screen, its pressure of writing for receiving can be from human body
Finger, pen or other the object of pressure can be produced to data board, when data board is display, what it was received writes pressure and can recognize
To be time span that it receives electric signal, the time span for example paused at same person's handwriting point with mouse is used as writing pressure
Power, the time that mouse pauses at same person's handwriting point is more long, it is believed that generation to write pressure bigger.Data board is electronic handwriting
Display device, each person's handwriting point is all coloured thereon, in writing process, color depth at any person's handwriting point with should
Pressure of writing at person's handwriting point is directly proportional, and so, same electronic handwriting can have deep mixed（I.e. color depth is different）
Outward appearance.
Certainly, this step can be with the color depth at each person's handwriting point on keeping records plate.
Step 102：By the coordinate for wiping each erasing point on the data board that the eraser of electronic handwriting is contacted
The erasing pressure that data board applies is corresponded when passing through the erasing point with eraser is preserved.
In the present invention, erasing is realized with eraser, eraser for electronic handwriting scrubbing action similar to rubber
Scrubbing action of the skin for pencil stroke.
To write similar on data board, eraser carries out erasing on data board and is also intended to apply certain on data board
Pressure, the pressure is referred to as erasing pressure in the present invention.When data board is handwriting pad or touch-screen, eraser can employment
Finger, hard thing etc. realize that the size for wiping pressure can be represented the actual pressure of data board with eraser, and when record
When plate is display, eraser can then be realized with mouse, and the size for now wiping pressure then can be with mouse in erasing
The time span of point place pause is represented.
Step 103：Judge whether the coordinate of erasing point is identical with the coordinate of in person's handwriting point one by one, be then according to the
One non-negative rule determines the color depth at the erasing point, and otherwise, the color depth at the erasing point is the background color depth of data board
Degree.
The first non-negative rule in the present invention includes：Step 103-1：The erasing point is subtracted with the pressure of writing at erasing point
The erasing pressure at place is poor so as to obtain first pressure；Step 103-2：If first pressure difference is less than predetermined threshold, the erasing
The color depth at point place is the background color depth of data board, and otherwise, color depth at the erasing point is poor to first pressure to be directly proportional.
Due to the erasing in the present invention be with eraser identify the handwriting at color depth modify, and in the prior art
The electronic handwriting at person's handwriting point is completely eliminated, the background color depth for making it be reduced to data board is different, in the present invention, identifies the handwriting
The result that color depth at point is modified can be that the electronic handwriting at the person's handwriting point is completely eliminated, or reduce it
Color depth, without being completely eliminated.The electronic handwriting on data board can be thus set to produce deep mixed effect, so that
Improve the resolution ratio of electronic handwriting on data board.
In order to effectively wipe the electronic handwriting at some person's handwriting points, the position of point is wiped general very close to person's handwriting point.This
Step judges whether the coordinate of erasing point is identical with the coordinate of in person's handwriting point one by one, it is therefore an objective to determine whether eraser is right
Person's handwriting point is applied with erasing pressure, is, represents that eraser implements erasing operation at the person's handwriting point, and this is accomplished by further
The difference for writing pressure and erasing pressure at the person's handwriting point is determined by step 103-1（I.e. first pressure is poor）, so as to according to step
Rapid 103-2 determines the color depth after being updated at the person's handwriting point.Certainly, for non-person's handwriting point, even if eraser is to the point
Pressure is applied with, due to the background color depth of its color depth originally data board, the color depth after its renewal is constant.
In the step 103-2 of the first non-negative rule, if first pressure difference is less than reservation threshold value, it is meant that eraser pair
The erasing pressure that the person's handwriting point applies is smaller, is not enough to offset the pressure of writing applied when being write at the person's handwriting point, thus should
Color depth at person's handwriting point will not be changed into the background color depth of data board, and can only shoal.But, if first pressure difference is not
Less than threshold value is subscribed, then mean that eraser is larger in the erasing pressure that the person's handwriting point place applies, be at least completely counterbalanced by this
What is applied when being write at person's handwriting point writes pressure, the purpose is to the electronic handwriting at the person's handwriting point is completely eliminated, reduces it
It is the background color depth of data board, therefore, the color depth at the person's handwriting point is reduced to the present invention background color depth of data board, with
Meet the requirement of user.
As can be seen here, the corresponding record of the present invention coordinate of person's handwriting point and coordinate and the erasing of pressure and erasing point are write
Pressure, by the coordinate than identifying the handwriting a little and wiping point, by the color depth of the two overlapping position according to the first non-negative rule come really
Fixed, so, the color depth at person's handwriting point being wiped free of just wipes that first pressure obtained by pressure is poor to be had with writing pressure and subtract
Close, as long as first pressure difference is not less than predetermined threshold, the color depth at the person's handwriting point is to shoal, without being changed into note completely
Record the color depth of person's handwriting point when being subject to smaller erasing pressure in the background color depth of plate, this and actual life can only shoal without
The situation for recovering background color depth completely is identical, therefore, hommization degree of the invention is greatly improved, the electronic pen write or draw
Mark also just has deep mixed color, more convenient to use.
Present invention is described so that the area of eraser contact history plate is only an erasing point as an example for Fig. 1 embodiments,
But, in actual life, the area of eraser contact history plate is generally larger, for example, when erasing operation is carried out, finger connects
Touch pixel of the area of touch-screen generally than touch-screen much bigger, thus the area of eraser contact history plate generally has multiple
Point, eraser is applied with that size is identical or erasing pressure of different sizes to each point.In eraser and data board once
In contact, the present invention can according to choose principle from it is all bear wipe pressure points in selection one as Fig. 1 embodiments institute
The erasing point stated, and other points for bearing to wipe pressure outside putting are closed on as the erasing corresponding with the erasing point
Point, principle of choosing here can have diversified forms according to specific needs, for example, can be by all points for bearing and wipe pressure
The point of maximum erasing pressure is born as erasing point, it is also possible to which the central point of the area that eraser is contacted with data board is used as wiping
Except point, etc..
The present invention is for the ease of practicality, it is stipulated that it is predetermined that the corresponding all erasing point of proximity of each erasing point constitute one
Style of writing sample.Here style of writing sample can be a predetermined figure, and the point e.g. centered on wiping point, length is predetermined just
Square region；Or to wipe point for the point in the upper left corner, all predetermined rectangular region of length and width；Or to wipe point to justify
The heart, the predetermined border circular areas of radius, etc..Style of writing sample can also originate from predetermined function and calculate, for example, being to wipe point
Origin, the cosine figure of the half period calculated according to cosine function（Symmetry axis passes through erasing point）As style of writing sample, etc.
Deng.It can be seen that, the position relationship between the corresponding all erasing point of proximity of the point of concrete regulation erasing here.
In this case, an erasing point comes from once contacting for eraser and data board, due to pre- in order to realize
Fixed wiping purposes, eraser can carry out multiple-contact with data board, thus in an erasing operation, the sum of erasing point with
The number of times of eraser contact history plate is identical.
Each erasing point is all corresponding with more than one erasing point of proximity, and the erasing pressure at each erasing point of proximity
May come from the sensing of sensor, it is also possible to obtain according to the erasing calculation of pressure at the corresponding erasing point of the erasing point of proximity
Arrive, a computational methods are：Erasing pressure at each erasing point of proximity is equal at the corresponding erasing point of the erasing point of proximity
Erasing pressure is multiplied by the predefined weight value corresponding to the erasing point of proximity.Feelings known to contact area in eraser and data board
Under condition, predefined weight value i.e. known quantity here, the predefined weight value corresponding to each erasing point of proximity can also may be used with identical
With difference, for example, respectively the corresponding predefined weight value of erasing point of proximity can be distributed according to cosine rule, it is also possible to random distribution.
When the presence of erasing point of proximity is considered, step 102 can also include：Will be each corresponding to each erasing point
The coordinate and the erasing pressure at the erasing point of proximity for wiping point of proximity are corresponded；
Step 103 can also include：Judge to wipe one by one point of proximity coordinate whether with person's handwriting point in the coordinate of
It is identical, it is that the color depth at the erasing point of proximity, otherwise, the face at the erasing point of proximity are then determined according to the second non-negative rule
Color depth is the background color depth of data board.
Wherein, the second non-negative rule includes：Step 103-3：Subtracted the erasing and faced with the pressure of writing at erasing point of proximity
Erasing pressure near point is poor so as to obtain second pressure；Step 103-4：If second pressure difference is less than predetermined threshold, should
Color depth at erasing point of proximity is the background color depth of data board, otherwise, the color depth and second at the erasing point of proximity
Pressure differential is directly proportional.
It can be seen that, the second non-negative rule is essentially identical with the first non-negative rule, is only to determine that the object of color depth becomes
Erasing point of proximity.
Due to considering the presence of erasing point of proximity, the present invention is further carried for the emulator of erasing operation in reality
Height, using also more convenient.
Above-mentioned the first non-negative rule and the second non-negative rule have been directed to predetermined threshold, and the predetermined threshold in the present invention can
0 is thought, or other values, for example, can be the perceived minimum pressure values of sensor on data board.
Fig. 2 is the structure chart using system of the invention.As shown in Fig. 2 the system includes data board 201, memory
202nd, controller 203, in the implementation of data board 201（Such as handwriting pad, touch-screen, display）It is determined that afterwards, eraser
And the way of realization of the writing implement write on data board is also assured that.
Data board 201 is used to perceive the point that eraser applies erasing pressure（Erasing point and erasing point of proximity）Coordinate and
Erasing pressure, and writing implement applies to write the point of pressure（Person's handwriting point）Coordinate and write pressure, perception here is made
With coming from sensor.
Memory 202 is used for the coordinate and erasing pressure one of the erasing point for sending data board 201 and erasing point of proximity
One correspondence preserve, and the coordinate of the person's handwriting point that data board 201 is sent and write pressure correspond preserve.
The called data from memory 202 of controller 203, the color depth at each erasing point is determined according to the first non-negative principle
Degree, determines the color depth at each erasing point of proximity, and these color depth values put are delivered into note according to the second non-negative principle
Record plate 201, the color depth for updating each point for it shows situation, to user intuitively recognizing.
As can be seen here, the present invention has advantages below：
（1）The corresponding record of the present invention coordinate of person's handwriting point and the coordinate and erasing pressure of pressure and erasing point are write,
By the coordinate than identifying the handwriting a little and wiping point, the color depth of the two overlapping position is determined according to the first non-negative rule, this
Sample, the color depth at person's handwriting point being wiped free of just with write pressure subtract erasing pressure obtained by first pressure it is poor relevant, only
Want first pressure difference not less than predetermined threshold, the color depth at the person's handwriting point is to shoal, without being changed into data board completely
Background color depth, the color depth of person's handwriting point can only shoal without complete when smaller erasing pressure is subject in this and actual life
The situation for recovering background color depth is identical, therefore, hommization degree of the invention is greatly improved, the electronic handwriting write or draw
Just there is deep mixed color, it is more convenient to use.
（2）In the present invention, identify the handwriting at the result modified of color depth can be that the person's handwriting point is completely eliminated
The electronic handwriting at place, or reduce its color depth, without being completely eliminated.The electronics on data board can thus be made
Person's handwriting produces deep mixed effect, so as to improve the resolution ratio of electronic handwriting on data board.
（3）In the present invention, due to considering the presence of erasing point of proximity, emulation of the present invention for erasing operation in reality
Degree is further improved, using also more convenient.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all it is of the invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (4)
1. it is a kind of wipe data board on electronic handwriting method, it is characterised in that the method includes：
Step 1：By the coordinate of each person's handwriting point on the electronic handwriting and the book suffered by data board when writing the person's handwriting point
Write pressure and correspond and preserve, and make described at the color depth of each person's handwriting point and the person's handwriting point on the data board
Pressure is write to be directly proportional；
Step 2：By the seat for wiping each erasing point on the data board that the eraser of the electronic handwriting is contacted
Mark to correspond the erasing pressure that the data board applies when passing through the erasing point with the eraser and preserve；
Step 3：Judge whether the coordinate of the erasing point is identical with the coordinate of in the person's handwriting point, is then basis one by one
First non-negative rule determines the color depth at the erasing point, and otherwise, the color depth at the erasing point is the data board
Background color depth；
Wherein, the first non-negative rule includes：Step 3-1：The erasing is subtracted with pressure is write described in described erasing at point
The erasing pressure at point is poor so as to obtain first pressure；Step 3-2：If the first pressure difference is less than predetermined threshold,
Then the color depth at the erasing point is the background color depth of the data board, otherwise, color depth at the erasing point with it is described
First pressure difference is directly proportional；
Wherein, each erasing point is all corresponding with more than one erasing point of proximity, and at each erasing point of proximity
Erasing pressure be equal to the erasing point of proximity it is corresponding erasing point at erasing pressure be multiplied by it is pre- corresponding to the erasing point of proximity
Determine weighted value；
Then the step 2 also includes：By the coordinate of each described erasing point of proximity corresponding to each erasing point and the wiping
Except the erasing pressure at point of proximity is corresponded；
The step 3 also includes：Judge one by one the erasing point of proximity coordinate whether with the person's handwriting point in the seat of
Mark is identical, is then to determine the color depth at the erasing point of proximity according to the second non-negative rule, otherwise, at the erasing point of proximity
Color depth is the background color depth of the data board；
Wherein, the second non-negative rule includes：Step 3-3：This is subtracted with pressure is write described in described erasing at point of proximity
The erasing pressure at erasing point of proximity is poor so as to obtain second pressure；Step 3-4：If the second pressure difference is less than institute
Predetermined threshold is stated, then the color depth at the erasing point of proximity is the background color depth of the data board, otherwise, the erasing point of proximity
The color depth at place is poor to the second pressure to be directly proportional.
2. method according to claim 1, it is characterised in that the corresponding all erasings of each erasing point close on
Point constitutes a predetermined style of writing sample.
3. the method according to any claim in claim 1-2, it is characterised in that the predetermined threshold is 0.
4. the method according to any claim in claim 1-2, it is characterised in that the data board is：Handwriting pad,
Or touch-screen, or display.
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| CN201310204275.2A CN104182137B (en) | 2013-05-28 | 2013-05-28 | A kind of method of the electronic handwriting on erasing data board |
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| CN201310204275.2A CN104182137B (en) | 2013-05-28 | 2013-05-28 | A kind of method of the electronic handwriting on erasing data board |
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| CN104182137B true CN104182137B (en) | 2017-06-16 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2015192271A1 (en) * | 2014-06-19 | 2015-12-23 | 福建福昕软件开发股份有限公司北京分公司 | Method for erasing electronic handwriting on a clipboard |
| JP6546455B2 (en) * | 2015-06-12 | 2019-07-17 | シャープ株式会社 | Eraser device and instruction input system |
| TWI571775B (en) * | 2015-12-01 | 2017-02-21 | Egalax_Empia Tech Inc | Electronic erasure device |
| CN106201314B (en) * | 2016-06-30 | 2019-03-19 | 成都东方闻道科技发展有限公司 | A kind of display methods and display device for realizing handwriting input on touch screen |
| CN107632735A (en) * | 2017-09-22 | 2018-01-26 | 深圳市德安里科技有限公司 | A kind of handwriting device, liquid crystal handwriting board device and method for deleting |
| CN107967191A (en) * | 2017-12-10 | 2018-04-27 | 吴静 | A kind of intelligent tutoring method and its system based on data recovery |
| CN108874275B (en) * | 2018-06-15 | 2020-12-22 | 广州视源电子科技股份有限公司 | Handwriting erasing method, handwriting erasing device, terminal and computer-readable storage medium |
| WO2020029125A1 (en) * | 2018-08-08 | 2020-02-13 | 深圳市柔宇科技有限公司 | Writing control method, handwriting pen, and handwriting input device |
| CN115079843A (en) * | 2021-03-16 | 2022-09-20 | 北京有竹居网络技术有限公司 | Writing instrument |
| CN113608667B (en) * | 2021-08-20 | 2024-07-09 | 深圳市灵畅互动科技有限公司 | Electronic handwriting writing and erasing method, storage medium and device |
| CN115098014B (en) * | 2021-12-29 | 2024-05-14 | 山东蓝贝思特教装集团股份有限公司 | Handwriting display method, controller and TFT liquid crystal writing device |
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