CN105913467B - Electronic writing method supporting draft function - Google Patents
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- CN105913467B CN105913467B CN201610203028.4A CN201610203028A CN105913467B CN 105913467 B CN105913467 B CN 105913467B CN 201610203028 A CN201610203028 A CN 201610203028A CN 105913467 B CN105913467 B CN 105913467B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T11/00—2D [Two Dimensional] image generation
- G06T11/20—Drawing from basic elements, e.g. lines or circles
- G06T11/203—Drawing of straight lines or curves
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Abstract
The invention provides an electronic writing method supporting the draft function. The method comprises steps that positioning to a pre-set text area searching origin is carried out, and neighborhood searching is carried out by taking the text area searching origin as a start point to acquire a text area; a preset background color is read; an area of a picture except the text area is a draft area; all the points of the draft area are set as a background color, and the picture of which the draft content of the draft area is automatically deleted is acquired. The method is advantaged in that not only can a draft habit of a user be satisfied, but also troubles in deleting the draft content of the user can be avoided, and writing experience of the user is improved.
Description
Technical field
The invention belongs to information science technology field is and in particular to a kind of electronic writing method supporting rough draft function.
Background technology
With the popularization and application of electronic technology and the communication technology, occur in that various forms of electronic writing equipments in recent years,
For example, the equipment such as handwriting pad, panel computer and mobile phone.For handwriting pad, user directly writes handwritten content in handwriting area, when
After the completion of write, handwriting pad obtains and comprises the handwriting area picture of handwritten content, and is transferred to display device and shows.For flat board
The smart machine such as computer and mobile phone, its operation has all kinds of mapping softwares, for example, Photoshop, CAD, drawing software etc..User
After starting mapping software, in drawing area graphing object, after drafting terminates, mapping software obtains and comprises Drawing Object
Drawing area picture and preserve.
However, during realizing the present invention, inventor finds, at least there is problems with prior art：
User usually has the custom worked out a draft when writing, and writes efficiency such that it is able to improve body matter, it is to avoid anti-
Overcoating changes body matter.But, user after the handwriting area of handwriting pad or the drawing area written contents of mapping software, due to
Whole handwriting area or whole drawing area can completely be preserved by handwriting pad or mapping software, therefore, by ensureing to be stored
Picture in written contents neat and artistic property, the commonly used following two modes of user：Mode one, user has to abandon beating
The custom of rough draft, directly can only write body matter in handwriting area or drawing area.This kind of ways of writing be not due to meeting use
Family is accustomed to, and therefore, that can reduce body matter writes efficiency.Mode two, user is in the part area of handwriting area or drawing area
Domain writes body matter, works out a draft in other regions, at the end of writing, then rough draft is deleted.The problem that this kind of mode exists
For：Increased the operation that user deletes rough draft, reduce the convenience of user writing.
It can be seen that, the operation how not only having met user's custom worked out a draft but also not increased user's deletion rough draft, improves user's book
Write experience, be problem in the urgent need to address at present.
Content of the invention
The defect existing for prior art, the present invention provides a kind of electronic writing method supporting rough draft function, can have
Effect solves the above problems.
The technical solution used in the present invention is as follows：
The present invention provides a kind of electronic writing method supporting rough draft function, comprises the following steps：
Step 1, obtains the picture comprising written handwriting；
Step 2, recognizes the closed boundary outline line of described picture；By preset rules, left side is navigated on described picture
Critical region and right side critical region；
Step 3, scans described left side critical region, judges whether scan initial person's handwriting in described left side critical region
Point；If it is judged that being no, then terminate the process to this picture；If it is judged that being yes, then execution step 4；
Step 4, if the quantity of the disconnected initial person's handwriting point scanning altogether is n, for person's handwriting initial each described
Point, all carries out following process：
Step 4.1, carries out neighborhood search with described initial person's handwriting point for starting point, obtains a person's handwriting connected region；
Step 4.2, judges to belong to described person's handwriting connected region with the presence or absence of at least one in the critical region of described right side
Person's handwriting point, if it does not exist, then the person's handwriting connected region being searched cannot be used as 1 initial segmentation person's handwriting line；If it does,
The described person's handwriting connected region then being searched is as 1 initial segmentation person's handwriting line；
Step 5, if search m bar initial segmentation person's handwriting line altogether；Wherein, m is less than or equal to n；Navigate to and just pre-set
Civilian range searching starting point, judges whether described text range searching starting point is located between two adjacent initial segmentation person's handwriting lines,
If it is, two adjacent initial segmentation person's handwriting lines are processed as by two adjacent effective segmentation person's handwriting lines using operations described below,
Thus the closed area being surrounded described closed boundary outline line is divided into three disconnected regions, then execution step 6；
Otherwise, using operations described below, the initial segmentation person's handwriting line nearest apart from described text range searching starting point is processed as effectively splitting
Person's handwriting line, thus the closed area that described closed boundary outline line is surrounded is divided into two disconnected regions, then holds
Row step 6；
Wherein, using following operation, initial segmentation person's handwriting line is processed and effectively split person's handwriting line：
Judge whether the leftmost side person's handwriting point of described initial segmentation person's handwriting line is intersected with described closed boundary outline line, if
Non-intersect, then described initial segmentation person's handwriting line is expanded to the left prolongation so as to intersect with described closed boundary outline line；If
Intersecting, then do not processed；
Judge whether the rightmost side person's handwriting point of described initial segmentation person's handwriting line is intersected with described closed boundary outline line, if
Non-intersect, then described initial segmentation person's handwriting line is expanded to the right prolongation so as to intersect with described closed boundary outline line；If
Intersecting, then do not processed；
The left and right sides person's handwriting point of the segmentation person's handwriting line after being achieved in expanding all is intersected with described closed boundary outline line, will
Segmentation person's handwriting line after expansion is designated as effectively splitting person's handwriting line；
Step 6, navigates to the text range searching starting point pre-setting, with described text range searching starting point as starting point
Carry out neighborhood search, obtain text region；Wherein, neighborhood search method is：
Step 6.1, marks text range searching starting point；
Step 6.2, searches for the neighborhood point of described text range searching starting point, judges whether described neighborhood point belongs to any one
Effectively splitting the person's handwriting point of person's handwriting line described in bar, if belonged to, not marking this neighborhood point, and terminate to enter one to this neighborhood point
Step search；If be not belonging to, mark this neighborhood point, then execution step 6.3；
Step 6.3, searches further for marked neighborhood of a point point, and judges whether this neighborhood point belongs to described in any one
Effectively split the person's handwriting point of person's handwriting line, if being not belonging to, marking this neighborhood point, so constantly circulating, until search terminates；
Step 6.4, all marked points form a connected region, and the connected region being formed is text region；
Step 7, reads the background color pre-seting；The region beyond text region of described picture is rough draft area
Domain；Described scratch area is set to a little described background color, thus obtains a width by the rough draft content of scratch area
The picture being automatically deleted.
Preferably, in step 2, the surrounding of described left side critical region and described right side critical region and described closed boundary
Outline line intersects or non-intersect.
Preferably, in step 3, judge to refer to whether described left side critical region scans initial person's handwriting point：
Judging whether scan any one person's handwriting point in described left side critical region, if scanned, will sweep first
The person's handwriting point retouched is as initial person's handwriting point.
Preferably, in step 4, in step 4.1, described neighborhood search is 8 connection Neighborhood-region-search algorithm.
Preferably, after step 7, also include：
The picture of rough draft content has been deleted in storage or automatically display.
The electronic writing method of the support rough draft function that the present invention provides has advantages below：
The operation that the present invention had not only met user's custom worked out a draft but also do not increased user's deletion rough draft, improves user writing body
Test.
Brief description
The schematic flow sheet of the electronic writing method of the support rough draft function that Fig. 1 provides for the present invention；
A kind of specific example figure of the picture comprising written handwriting that Fig. 2 provides for the present invention；
Fig. 3 is a kind of setting schematic diagram of left side critical region and right side critical region；
Fig. 4 is another kind of setting schematic diagram of left side critical region and right side critical region；
Fig. 5 is another kind of setting schematic diagram of left side critical region and right side critical region.
Specific embodiment
In order that technical problem solved by the invention, technical scheme and beneficial effect become more apparent, below in conjunction with
Drawings and Examples, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein only in order to
Explain the present invention, be not intended to limit the present invention.
The present invention provides a kind of electronic writing method supporting rough draft function, joins with various forms of electronic writing equipments
Close, electronic writing equipment includes but is not limited to handwriting pad, panel computer and mobile phone；Or, with all kinds of mapping softwares cooperation it is allowed to
User writes body matter and rough draft content in the zones of different of handwriting pad or mapping software by certain rule simultaneously, by this
The method that invention provides, obtains the picture comprising written handwriting first, and this picture is and has write in handwriting pad or mapping software
The original image obtaining after one-tenth, then, by processing to original image, can automatic identification delete the grass in original image
Original text content, deletes manually without user, thus both having met the custom that user works out a draft, will not increase user again and deleting rough draft
Operation, improve the experience of user writing.
For convenience of understanding to the present invention, introduce lower user first in handwriting pad or mapping software written contents, need
Necessary rule to be observed：
Configured according to subsequent software of the present invention, two kinds of rules can be divided into：
Rules for writing 1：Write body matter for meeting user above handwriting pad or drawing area, in handwriting pad or
The custom of rough draft content is write in the top of drawing area.
Subsequently it is automatically deleted the function of rough draft content for realizing the present invention, herein, user need to be instructed for handwriting pad or to paint
The drawing area of figure software, if user needs synchronization in writing process to work out a draft, needs to draw first at the beginning of horizontal the 1st article
Begin segmentation person's handwriting line, and certainly, the 1st bar of initial segmentation person's handwriting line can also be able to be curve for straight line；And, the 1st article initial point
Cut person's handwriting line left and right two ends should close proximity to the right boundary of handwriting pad or drawing interface, certainly, specifically near handwriting pad or
The distance of drawing interface right boundary do not need user accurately to hold it is only necessary to close proximity to.By drawing above-mentioned the 1st
Bar initial segmentation person's handwriting line, the region above the 1st bar of initial segmentation person's handwriting line is text region, for user writing text
Content；And the region below the 1st bar of initial segmentation person's handwriting line is scratch area, work out a draft for user.With user writing mistake
, it may occur however that the situation of the less demand it is impossible to satisfaction is worked out a draft in scratch area, now, user can be at the beginning of the 1st article for the carrying out of journey
The 2nd bar of initial segmentation person's handwriting line is drawn by same method for drafting again in the top beginning to split person's handwriting line, then be located at the 2nd article initial point
The region cut below person's handwriting line is scratch area, and the rest may be inferred, constantly can draw drafting above initial segmentation person's handwriting line
New initial segmentation person's handwriting line, by this kind of method, realizing user needs can constantly extend scratch area at any time with writing
Function, improves the convenience of user writing.
Rules for writing 2：Write body matter for meeting user in the zone line of handwriting pad or drawing area, hand-written
The custom that the upside of plate or drawing area or underside area are worked out a draft.
This rule is：User need to be instructed to draw horizontal two bar initial segmentation person's handwriting line first, initial point can be designated as respectively
Cut person's handwriting line a and initial segmentation person's handwriting line b, wherein, initial segmentation person's handwriting line a is located at the top of initial segmentation person's handwriting line b, then just
The region begun between segmentation person's handwriting line a and initial segmentation person's handwriting line b is text region, and other regions are scratch area；If
There is writing when needing it is only necessary to continue to draw near initial segmentation person's handwriting line a or initial of extension scratch area in text region
The initial segmentation person's handwriting line of segmentation person's handwriting line b, is achieved in constantly extending the function of scratch area.
It is emphasized that rules for writing 1 and rules for writing 2 are only the example of two kinds of rules for writing, in practical application,
Can be deformed according to above-mentioned design.
The implementation of the present invention is described below：
We have proposed a kind of electronic writing method supporting rough draft function, user can be operated by above-mentioned rules for writing,
Input body matter and rough draft content in an image, the present invention can automatically identify the region of rough draft content and delete.Knot
Close Fig. 1, comprise the following steps：
Step 1, obtains the picture comprising written handwriting；It is and complete in body matter and rough draft according to above-mentioned rules for writing
Hold write after, obtained picture.With reference to Fig. 2, for comprising a kind of specific example of the picture of written handwriting.
Step 2, recognizes the closed boundary outline line of described picture；By preset rules, left side is navigated on described picture
Critical region and right side critical region；In fig. 2,1 represent closed boundary outline line；2 represent left side critical region；3 represent the right side
Side critical region.
In practical application, the surrounding of left side critical region and right side critical region is intersected with closed boundary outline line or not phase
Hand over, with reference to Fig. 3, be a kind of setting schematic diagram of left side critical region and right side critical region, itself and closed boundary profile
The right and left of line is all non-intersect but intersects with upper and lower both sides.With reference to Fig. 4, for left side critical region and right side critical region
Another kind of setting schematic diagram, it is all non-intersect with the right and left of closed boundary outline line, upper and lower both sides.With reference to Fig. 5, for left side
Critical region and another kind of setting schematic diagram of right side critical region, it is all non-intersect with the surrounding of closed boundary outline line.Right
In Fig. 5, it with the disjoint reason in both sides up and down of closed boundary outline line is：When user draws initial segmentation person's handwriting line,
User seldom againsts lower edges line, and such picture is also nonsensical.
Step 3, scans described left side critical region, judges whether scan initial person's handwriting in described left side critical region
Point；If it is judged that being no, then terminate the process to this picture；If it is judged that being yes, then execution step 4；
In this step, judge to refer to whether described left side critical region scans initial person's handwriting point：
Judging whether scan any one person's handwriting point in described left side critical region, if scanned, will sweep first
The person's handwriting point retouched is as initial person's handwriting point.
Step 4, if the quantity of the disconnected initial person's handwriting point scanning altogether is n, for person's handwriting initial each described
Point, all carries out following process：
Step 4.1, carries out neighborhood search with described initial person's handwriting point for starting point, can be obtained using 8 connection Neighborhood-region-search algorithm
To a person's handwriting connected region；
Step 4.2, judges to belong to described person's handwriting connected region with the presence or absence of at least one in the critical region of described right side
Person's handwriting point, if it does not exist, then the person's handwriting connected region being searched cannot be used as 1 initial segmentation person's handwriting line；If it does,
The described person's handwriting connected region then being searched is as 1 initial segmentation person's handwriting line；
In fig. 2, the quantity that can scan altogether disconnected initial person's handwriting point is 4, respectively the 1st bar person's handwriting line
4.1st, the initial person's handwriting point of the 2nd bar of person's handwriting line 4.2, the 3rd bar of person's handwriting line 4.3, the 4th bar of this four bars of person's handwriting lines of person's handwriting line 4.4.But
It is, for the 1st bar of person's handwriting line 4.1, to there is not person's handwriting point in the critical region of right side, therefore, the 1st bar of person's handwriting line 4.1 cannot be made
For 1 initial segmentation person's handwriting line.And the 2nd bar of person's handwriting line 4.2, the 3rd bar of person's handwriting line 4.3, the 4th bar of person's handwriting line 4.4 are initial point
Cut person's handwriting line.
Step 5, if search m bar initial segmentation person's handwriting line altogether；Wherein, m is less than or equal to n；Navigate to and just pre-set
Civilian range searching starting point, judges whether described text range searching starting point is located between two adjacent initial segmentation person's handwriting lines,
If it is, two adjacent initial segmentation person's handwriting lines are processed as by two adjacent effective segmentation person's handwriting lines using operations described below,
Thus the closed area being surrounded described closed boundary outline line is divided into three disconnected regions, then execution step 6；
Otherwise, using operations described below, the initial segmentation person's handwriting line nearest apart from described text range searching starting point is processed as effectively splitting
Person's handwriting line, thus the closed area that described closed boundary outline line is surrounded is divided into two disconnected regions, then holds
Row step 6；
Wherein, using following operation, initial segmentation person's handwriting line is processed and effectively split person's handwriting line：
Judge whether the leftmost side person's handwriting point of described initial segmentation person's handwriting line is intersected with described closed boundary outline line, if
Non-intersect, then described initial segmentation person's handwriting line is expanded to the left prolongation so as to intersect with described closed boundary outline line；If
Intersecting, then do not processed；
Judge whether the rightmost side person's handwriting point of described initial segmentation person's handwriting line is intersected with described closed boundary outline line, if
Non-intersect, then described initial segmentation person's handwriting line is expanded to the right prolongation so as to intersect with described closed boundary outline line；If
Intersecting, then do not processed；
The left and right sides person's handwriting point of the segmentation person's handwriting line after being achieved in expanding all is intersected with described closed boundary outline line, will
Segmentation person's handwriting line after expansion is designated as effectively splitting person's handwriting line；
For Fig. 2, the difference of the position according to text range searching starting point, take different processing modes.
For example, if text range searching starting point is the A point of in figure, effectively split person's handwriting line because A point is located in bar
Top, is not located between adjacent two bar initial segmentation person's handwriting line, therefore, by the initial segmentation person's handwriting line nearest apart from A point, that is,
Article 2, person's handwriting line 4.2 is processed as effectively splitting person's handwriting line, thus the closed area that closed boundary outline line is surrounded is divided into
Upper and lower two disconnected regions.In subsequent process, the region recognition by the 2nd bar of person's handwriting line 4.2 lower section is scratch area, and fills out
Fill particular color.
If text range searching starting point is the B point of in figure, positioned at the 2nd bar of adjacent person's handwriting line 4.2 and the 3rd bar of person's handwriting line
Between 4.3, therefore, the 2nd bar of person's handwriting line 4.2 and the 3rd bar of person's handwriting line 4.3 are processed as effectively splitting person's handwriting line, thus will close
The closed area that boundary contour is surrounded is divided into three disconnected regions.In subsequent process, by the 2nd bar of person's handwriting line 4.2
Region recognition and the 3rd bar of person's handwriting line 4.3 between is text region, other region recognition is scratch area, and fills specific
Color.
In addition, for three initial segmentation person's handwriting lines illustrated in fig. 2, only the 2nd bar person's handwriting line 4.2 needs to be expanded
The operation extending, switchs to effectively split person's handwriting line so as to intersect with closed boundary outline line；For the 3rd bar of person's handwriting line 4.3 and
Article 4, person's handwriting line 4.4, essence is effectively segmentation person's handwriting line.
Step 6, navigates to the text range searching starting point pre-setting, with described text range searching starting point as starting point
Carry out neighborhood search, obtain text region；Wherein, neighborhood search method is：
Step 6.1, marks text range searching starting point；
Step 6.2, searches for the neighborhood point of described text range searching starting point, judges whether described neighborhood point belongs to any one
Effectively splitting the person's handwriting point of person's handwriting line described in bar, if belonged to, not marking this neighborhood point, and terminate to enter one to this neighborhood point
Step search；If be not belonging to, mark this neighborhood point, then execution step 6.3；
Step 6.3, searches further for marked neighborhood of a point point, and judges whether this neighborhood point belongs to described in any one
Effectively split the person's handwriting point of person's handwriting line, if being not belonging to, marking this neighborhood point, so constantly circulating, until search terminates；
Step 6.4, all marked points form a connected region, and the connected region being formed is text region；
Step 7, reads the background color pre-seting；The region beyond text region of described picture is rough draft area
Domain；Described scratch area is set to a little described background color, thus obtains a width by the rough draft content of scratch area
The picture being automatically deleted.
After step 7, also include：
The picture of rough draft content has been deleted in storage or automatically display.
The electronic writing method of the support rough draft function that the present invention provides has advantages below：
The operation that the present invention had not only met user's custom worked out a draft but also do not increased user's deletion rough draft, improves user writing body
Test.
The above is only the preferred embodiment of the present invention it is noted that ordinary skill people for the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
Depending on protection scope of the present invention.
Claims (5)
1. a kind of electronic writing method supporting rough draft function is it is characterised in that comprise the following steps：
Step 1, obtains the picture comprising written handwriting；
Step 2, recognizes the closed boundary outline line of described picture；By preset rules, left side is navigated on described picture to differentiate
Region and right side critical region；
Step 3, scans described left side critical region, judges whether scan initial person's handwriting point in described left side critical region；As
Fruit judged result is no, then terminate the process to this picture；If it is judged that being yes, then execution step 4；
Step 4, if the quantity of the disconnected initial person's handwriting point scanning altogether is n, for person's handwriting point initial each described, all
Carry out following process：
Step 4.1, carries out neighborhood search with described initial person's handwriting point for starting point, obtains a person's handwriting connected region；
Step 4.2, judges to belong to the person's handwriting of described person's handwriting connected region with the presence or absence of at least one in the critical region of described right side
Point, if it does not exist, then the person's handwriting connected region being searched cannot be used as 1 initial segmentation person's handwriting line；If it is present institute
The described person's handwriting connected region searching is as 1 initial segmentation person's handwriting line；
Step 5, if search m bar initial segmentation person's handwriting line altogether；Wherein, m is less than or equal to n；Navigate to the text area pre-setting
Domain search starting point, judges whether described text range searching starting point is located between two adjacent initial segmentation person's handwriting lines, if
It is that two adjacent initial segmentation person's handwriting lines are processed as by two adjacent effective segmentation person's handwriting lines using operations described below, thus
The closed area that described closed boundary outline line is surrounded is divided into three disconnected regions, then execution step 6；No
Then, using operations described below, the initial segmentation person's handwriting line nearest apart from described text range searching starting point is processed as effectively splitting pen
Trace, thus the closed area that described closed boundary outline line is surrounded is divided into two disconnected regions, then executes
Step 6；
Wherein, using following operation, initial segmentation person's handwriting line is processed and effectively split person's handwriting line：
Judge whether the leftmost side person's handwriting point of described initial segmentation person's handwriting line is intersected with described closed boundary outline line, if not phase
Hand over, then described initial segmentation person's handwriting line is expanded to the left prolongation so as to intersect with described closed boundary outline line；If phase
Hand over, then do not processed；
Judge whether the rightmost side person's handwriting point of described initial segmentation person's handwriting line is intersected with described closed boundary outline line, if not phase
Hand over, then described initial segmentation person's handwriting line is expanded to the right prolongation so as to intersect with described closed boundary outline line；If phase
Hand over, then do not processed；
The left and right sides person's handwriting point of the segmentation person's handwriting line after being achieved in expanding all is intersected with described closed boundary outline line, will expand
Segmentation person's handwriting line afterwards is designated as effectively splitting person's handwriting line；
Step 6, navigates to the text range searching starting point pre-setting, and is carried out with described text range searching starting point for starting point
Neighborhood search, obtains text region；Wherein, neighborhood search method is：
Step 6.1, marks text range searching starting point；
Step 6.2, searches for the neighborhood point of described text range searching starting point, judges whether described neighborhood point belongs to any one institute
State effective person's handwriting point splitting person's handwriting line, if belonging to, not marking this neighborhood point, and terminating searching further to this neighborhood point
Rope；If be not belonging to, mark this neighborhood point, then execution step 6.3；
Step 6.3, searches further for marked neighborhood of a point point, and judge this neighborhood point whether belong to any one described effectively
The person's handwriting point of segmentation person's handwriting line, if being not belonging to, marking this neighborhood point, so constantly circulating, until search terminates；
Step 6.4, all marked points form a connected region, and the connected region being formed is text region；
Step 7, reads the background color pre-seting；The region beyond text region of described picture is scratch area；
Described scratch area is set to a little described background color, thus obtaining a width will be automatic for the rough draft content of scratch area
The picture deleted.
2. the electronic writing method supporting rough draft function according to claim 1 is it is characterised in that in step 2, a described left side
The surrounding of side critical region and described right side critical region is intersected or non-intersect with described closed boundary outline line.
3. the electronic writing method supporting rough draft function according to claim 1 is it is characterised in that in step 3, judge
Whether described left side critical region scans initial person's handwriting point refers to：
Judging whether scan any one person's handwriting point in described left side critical region, if scanned, will scan first
Person's handwriting point as initial person's handwriting point.
4. the electronic writing method supporting rough draft function according to claim 1 is it is characterised in that in step 4, step
In 4.1, described neighborhood search is 8 connection Neighborhood-region-search algorithm.
5. the electronic writing method supporting rough draft function according to claim 1 is it is characterised in that after step 7, also wrap
Include：
The picture of rough draft content has been deleted in storage or automatically display.
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| CN201610203028.4A CN105913467B (en) | 2016-04-01 | 2016-04-01 | Electronic writing method supporting draft function |
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|---|---|---|---|
| CN201610203028.4A CN105913467B (en) | 2016-04-01 | 2016-04-01 | Electronic writing method supporting draft function |
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| CN109407954B (en) * | 2018-09-11 | 2022-02-11 | 宁波思骏科技有限公司 | Writing track erasing method and system |
| CN110598642A (en) * | 2019-09-16 | 2019-12-20 | 杭州大拿科技股份有限公司 | Calculation question online exercise method, device, equipment and storage medium |
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| JP5942835B2 (en) * | 2012-12-20 | 2016-06-29 | 富士ゼロックス株式会社 | Handwritten information processing apparatus and program |
| CN103218765A (en) * | 2013-03-21 | 2013-07-24 | 无锡曼荼罗软件有限公司 | Method and system for retaining medical document modifying traces |
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