CN111352562B - Chalk character realization method and device, electronic equipment and storage medium - Google Patents
Chalk character realization method and device, electronic equipment and storage medium Download PDFInfo
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- CN111352562B CN111352562B CN201910058722.5A CN201910058722A CN111352562B CN 111352562 B CN111352562 B CN 111352562B CN 201910058722 A CN201910058722 A CN 201910058722A CN 111352562 B CN111352562 B CN 111352562B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- 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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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- 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]
- G06F3/0481—Interaction techniques based on graphical user interfaces [GUI] based on specific properties of the displayed interaction object or a metaphor-based environment, e.g. interaction with desktop elements like windows or icons, or assisted by a cursor's changing behaviour or appearance
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- 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]
- G06F3/0484—Interaction techniques based on graphical user interfaces [GUI] for the control of specific functions or operations, e.g. selecting or manipulating an object, an image or a displayed text element, setting a parameter value or selecting a range
- G06F3/04847—Interaction techniques to control parameter settings, e.g. interaction with sliders or dials
Abstract
The invention discloses a method and a device for realizing chalk characters, electronic equipment and a storage medium. The chalk character realization method comprises the following steps: receiving a writing touch instruction, and obtaining handwriting framework point information according to the writing touch instruction; determining handwriting connection point information according to the handwriting architecture point information; and drawing the chalk writing according to the handwriting framework point information and the handwriting connection point information and by combining the chalk writing unit diagram. The chalk character realizing device comprises: the handwriting recognition system comprises a framework point module, a connection point module and a handwriting realization module. The electronic equipment comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, and the processor executes the program to realize the chalk character realization method. The computer-readable storage medium storing a computer program which, when executed by a processor, implements the chalk-word implementing method.
Description
Technical Field
The invention relates to the technical field of touch screens, in particular to a method and a device for realizing chalk characters, electronic equipment and a storage medium.
Background
In daily life, people often encounter scenes of handwriting input in touch screen writing equipment, such as electronic signatures in banking work, handwriting input writing on a mobile phone or a tablet computer, large-screen electronic whiteboard writing in schools or enterprises and the like. The touch screen writing device needs to restore and display handwriting input by a user. With regard to the touch screen writing equipment who uses in the school of studying, the user is more used to and prefers in the writing effect of chalk word, write the handwriting with simple line representation mostly in the current touch screen writing equipment, and this kind of display mode is stiff, and is poor to the reduction effect of writing the handwriting, and can't possess the writing effect of chalk word.
Disclosure of Invention
In view of the above, the present invention is to provide a method, an apparatus, an electronic device and a storage medium for implementing chalk characters, which can simulate handwriting and have a chalk character display effect.
Based on the above purpose, the invention provides a method for realizing chalk characters, which comprises the following steps:
receiving a writing touch instruction, and obtaining handwriting framework point information according to the writing touch instruction, wherein the handwriting framework point information comprises framework point coordinates and framework point radius;
determining handwriting connection point information according to the handwriting framework point information, wherein the handwriting connection point information comprises connection point coordinates and connection point radiuses;
and drawing the chalk writing according to the handwriting framework point information and the handwriting connection point information by combining a preset chalk writing unit drawing.
Optionally, the receiving a writing touch instruction, and obtaining handwriting framework point information according to the writing touch instruction includes:
obtaining handwriting touch point information according to the writing touch instruction, wherein the handwriting touch point information comprises touch point coordinates and touch point touch time;
obtaining the moving speed of the touch point according to the coordinates of the touch point and the touch time of the touch point, wherein the handwriting touch point information also comprises the moving speed of the touch point;
obtaining a touch point pressure value according to the touch point moving speed, wherein the handwriting touch point information also comprises the touch point pressure value;
filtering the handwriting touch point information to obtain touch point filtering information, wherein the touch point filtering information comprises touch point filtering coordinates and touch point filtering pressure values;
obtaining the radius of the touch point according to the touch point filtering pressure value;
and determining the handwriting framework point information according to the touch point filtering coordinate and the touch point radius, wherein the framework point coordinate is the touch point filtering coordinate, and the framework point radius is the touch point radius.
Optionally, obtaining the moving speed of the touch point according to the coordinates of the touch point and the touch time of the touch point includes:
obtaining the touch point distance between the current handwriting touch point and the previous handwriting touch point according to the touch point coordinates of the current handwriting touch point and the touch point coordinates of the previous handwriting touch point;
obtaining the touch time difference between the current handwriting touch point and the previous handwriting touch point according to the touch time of the touch point of the current handwriting touch point and the touch time of the touch point of the previous handwriting touch point;
and obtaining the moving speed of the touch point of the current handwriting touch point according to the distance of the touch point and the touch time difference.
Optionally, obtaining the touch point pressure value according to the touch point moving speed includes:
setting a moving speed standard value K and setting an original pressure value as 1, wherein when the moving speed of the touch point is equal to the moving standard value K, the touch point pressure value is 1;
the touch point PnThe touch point pressure value of (1):
wherein, FnThe touch point pressure value, F, representing the current touch point, i.e. the nth touch pointn-1And the pressure value of the touch point representing the previous touch point, v represents the moving speed of the touch point, and K represents a standard value of the moving speed.
Optionally, the filtering processing is performed on the handwriting touch point information to obtain touch point filtering information, and the filtering processing includes:
the current handwriting touch point may be represented as:
Pn((x,y),t,v,F)
wherein (x, y) represents the coordinates of the touch point, t represents the touch time of the touch point, v represents the moving speed of the touch point, and F represents the pressure value of the touch point;
touch control of a sequence of points with a stylus (P)1，P2，P3，…，Pm-1,Pm) Representing the handwriting, and circularly reading the handwriting touch point information in the handwriting touch point sequence;
setting an exponential compensation coefficient for the touch point coordinates (x, y) to be 0.65, and setting an exponential compensation coefficient for the touch point pressure value F to be 0.9;
and respectively performing exponential filtering processing on the touch point coordinates (x, y) and the touch point pressure value F according to the exponential compensation coefficients for the touch point coordinates (x, y) and the exponential compensation coefficients for the touch point pressure value F to obtain touch point filtering coordinates and touch point filtering pressure values.
Optionally, obtaining the radius of the touch point according to the touch point filtering pressure value includes:
calculating a radius coefficient l according to the touch point filtering pressure valuer：
F represents the filtering pressure value of the touch point;
according to the radius coefficient lrCalculating the touch point radius r:
r＝0.72Rmin+|lr|(1.35Rmax-0.72Rmin)
wherein R isminAnd RmaxRespectively representing a preset minimum radius and a preset maximum radius.
Optionally, the determining handwriting connection point information according to the handwriting framework point information includes:
calculating the connection coefficient l of the handwriting connection point between two adjacent handwriting framework points according to the distance between the two adjacent handwriting framework pointsf：
Wherein, the L represents the distance between the adjacent handwriting framework points, d represents a judgment coefficient, and the initial value of the judgment coefficient is 0;
according to the connection coefficient lfCalculating the connection point radius CPn(r)：
CPn(r)＝OPn-1(r)+lf(OPn(r)-OPn-1(r))
Wherein OPn(r) the architecture point radius, OP, representing the current handwriting architecture pointn-1(r) the architecture point radius, l, representing the previous handwriting architecture pointfRepresenting the connection coefficient of the current handwriting connection point;
according to the connection coefficient lfCalculating the abscissa CP of the connection pointn(x):
CPn(x)＝OPn-1(x)+lf(OPn(x)-OPn-1(x))
Wherein OPn(x) Abscissa, OP, representing the current handwriting structure pointn-1(x) Abscissa, l, representing the point of the handwriting structurefRepresenting the connection coefficient of the current handwriting connection point;
according to the connection coefficient lfCalculating the connection point ordinate CPn(y):
CPn(y)＝OPn-1(y)+lf(OPn(y)-OPn-1(y))
Wherein OPn(y) a vertical coordinate, OP, representing the current handwriting structure pointn-1(y) ordinate, l, representing the handwriting structure pointfRepresenting the connection coefficient of the current handwriting connection point;
for the connection point radius CPn(r) judging, updating the judgment coefficient according to the judgment result, and recalculating to obtain a new connection coefficient lfAnd according to said new connection coefficient lfCalculating to obtain new handwriting connection point information until the judgment coefficient d is larger than the distance L between adjacent handwriting framework points:
and determining a plurality of handwriting connection points between two adjacent handwriting framework points to obtain the handwriting connection point information of the handwriting connection points.
Optionally, the drawing the chalk writing according to the writing architecture point information and the writing connection point information by combining a preset chalk writing unit drawing comprises:
forming handwriting unit points by the handwriting framework points and the handwriting connecting points, wherein the handwriting unit point information comprises unit point coordinates and unit point radiuses;
drawing a series of chalk writing unit drawings according to the unit point coordinates and the unit point radiuses, determining the centers of the chalk writing unit drawings according to the unit point coordinates, and determining the sizes of the chalk writing unit drawings according to the unit point radiuses to obtain chalk writing.
Optionally, the chalk writing unit diagram is composed of a series of discrete points randomly distributed in a circular range, and the size and shape of each discrete point are random.
Based on the above purpose, the present invention provides a device for realizing chalk characters, comprising:
the handwriting input device comprises a writing touch instruction, an architecture point module and a handwriting input module, wherein the writing touch instruction is used for writing handwriting on a handwriting input device;
the connecting point module is used for determining handwriting connecting point information according to the handwriting framework point information, and the handwriting connecting point information comprises connecting point coordinates and connecting point radius;
and the handwriting realization module is used for drawing the chalk handwriting by combining a preset chalk handwriting unit drawing according to the handwriting framework point information and the handwriting connection point information.
In view of the above object, the present invention provides an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the chalk word implementing method when executing the program.
In view of the above object, the present invention provides a computer-readable storage medium storing a computer program, wherein the computer program realizes the steps of the chalk-character realization method when executed by a processor.
From the above, the method, the device, the electronic equipment and the storage medium for realizing the chalk characters provided by the invention determine the handwriting framework point information through the writing touch instruction, realize the positioning of the chalk character handwriting framework, determine the handwriting connection points according to the handwriting framework points, form the handwriting unit points by the handwriting framework points and the handwriting connection points, and finally finish the drawing of the chalk character handwriting by combining the chalk handwriting unit drawing, so that the track, the thickness and the display effect of the chalk character handwriting can be reduced, the simulation of the real chalk character handwriting is realized, and the beautiful and smooth chalk character handwriting with high reduction degree is obtained.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a method for implementing chalk characters according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating a method for obtaining handwriting framework point information according to the writing touch instruction in a chalk character implementation method according to an embodiment of the present invention;
FIG. 3 is a drawing of a chalk writing unit in a method for implementing chalk characters according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a device for implementing chalk characters according to an embodiment of the present invention;
fig. 5 is a schematic diagram of an electronic device for implementing chalk characters according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings.
It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are used for distinguishing two entities with the same name but different names or different parameters, and it should be noted that "first" and "second" are merely for convenience of description and should not be construed as limitations of the embodiments of the present invention, and they are not described in any more detail in the following embodiments.
In one aspect, the invention provides a method for realizing chalk characters.
As shown in fig. 1, some alternative embodiments of the present invention provide a method for implementing chalk characters, including:
s1: receiving a writing touch instruction, and obtaining handwriting framework point information according to the writing touch instruction; the handwriting framework point information comprises framework point coordinates and a framework point radius;
s2: determining handwriting connection point information according to the handwriting framework point information, wherein the handwriting connection point information comprises connection point coordinates and connection point radiuses;
s3: and drawing the chalk writing according to the handwriting framework point information and the handwriting connection point information by combining a preset chalk writing unit drawing.
The method for realizing the chalk characters determines handwriting framework points according to writing touch instructions, determines handwriting connection points according to the handwriting framework points, and finally finishes drawing the chalk characters according to the handwriting framework points and the handwriting connection points.
As shown in fig. 2, in a chalk-character implementation method provided by some alternative embodiments of the present invention, the receiving a writing touch instruction, and obtaining handwriting structure point information S1 according to the writing touch instruction includes:
s11: obtaining handwriting touch point information according to the writing touch instruction, wherein the handwriting touch point information comprises touch point coordinates and touch point touch time;
s12: obtaining the moving speed of the touch point according to the coordinates of the touch point and the touch time of the touch point, wherein the handwriting touch point information also comprises the moving speed of the touch point;
s13: obtaining a touch point pressure value according to the touch point moving speed, wherein the handwriting touch point information also comprises the touch point pressure value;
s14: filtering the handwriting touch point information to obtain touch point filtering information, wherein the touch point filtering information comprises touch point filtering coordinates and touch point filtering pressure values;
s15: obtaining the radius of the touch point according to the touch point filtering pressure value;
s16: and determining the handwriting framework point information according to the touch point filtering coordinate and the touch point radius, wherein the framework point coordinate is the touch point filtering coordinate, and the framework point radius is the touch point radius.
In the chalk writing implementation method, handwriting touch point information is determined according to a writing touch instruction, filtering is carried out on the handwriting touch point information, noise points which can interfere with the chalk writing track in the initial handwriting touch points are discharged, the obtained handwriting framework points are accurately attached to the chalk writing track, and the chalk writing track is accurately positioned. And the radius of the touch point is determined according to the pressure value of the touch point, the condition that the handwriting line is thick when the pen pressure is high in real writing is simulated, and the handwriting line thickness of the chalk characters can be accurately reduced.
In some optional embodiments of the present invention, in a method for implementing chalk characters, the obtaining a touch point moving speed S12 according to the touch point coordinates and the touch time of the touch point includes:
s121, according to the touch point coordinates of the current handwriting touch point and the touch point coordinates of the previous handwriting touch point, obtaining the touch point distance between the current handwriting touch point and the previous handwriting touch point;
s122, according to the touch time of the touch point of the current handwriting touch point and the touch time of the touch point of the previous handwriting touch point, obtaining the touch time difference between the current handwriting touch point and the touch point of the previous handwriting;
and S123, obtaining the moving speed of the touch point of the current handwriting touch point according to the distance between the touch points and the touch time difference.
In some optional embodiments of the present invention, in a method for implementing chalk characters, the obtaining a touch point pressure value S13 according to the moving speed of the touch point includes:
setting a moving speed standard value K and setting an original pressure value as 1, wherein when the moving speed of the touch point is equal to the moving standard value K, the touch point pressure value is 1;
the touch point PnThe touch point pressure value of (1):
wherein, FnThe touch point pressure value, F, representing the current touch point, i.e. the nth touch pointn-1And the pressure value of the touch point representing the previous touch point, v represents the moving speed of the touch point, and K represents a standard value of the moving speed.
At the current touch point PnWhen the moving speed v of the touch point is zero, it indicates that the touch point P is currently at the present timenNo displacement occurs with respect to the previous touch point, i.e. the current touch point PnCoinciding with the previous touch point, which corresponds to the situation where the pen-down point of the chalk-written trace stops in the real writing situation, in which case the current touch point P is stationarynThe touch point pressure value FnThe touch point pressure value F compared with the previous touch pointn-1No change occurred.
In the chalk character implementation method, in the step of obtaining the touch point pressure value according to the touch point moving speed, the situation that the touch point moving speed is not zero is divided into three situations, and corresponding calculation methods are respectively provided for calculating the touch point pressure values under the three situations, wherein the calculation method is an abstraction that the pressure of a chalk writing falling point changes along with the moving speed under the real writing situation, and can accurately reflect the pressure change situation in the real writing.
In some optional embodiments of the present invention, in a chalk character implementation method, the filtering processing is performed on the handwriting touch point information to obtain touch point filtering information, where the touch point filtering information includes:
the current handwriting touch point may be represented as:
Pn((x,y),t,v,F)
wherein (x, y) represents the coordinates of the touch point, t represents the touch time of the touch point, v represents the moving speed of the touch point, and F represents the pressure value of the touch point;
touch control of a sequence of points with a stylus (P)1，P2，P3，…，Pm-1,Pm) Representing the handwriting, putting the handwriting touch point sequence into a filtering list, and circularly reading the handwriting touch point information in the handwriting touch point sequence;
in some embodiments, the current handwriting touch point is placed at the top in the filtering list, and at most six handwriting touch points are placed;
setting an exponential compensation coefficient for the touch point coordinates (x, y) to be 0.65, and setting an exponential compensation coefficient for the touch point pressure value F to be 0.9;
and respectively performing exponential filtering processing on the touch point coordinates (x, y) and the touch point pressure value F according to the exponential compensation coefficients for the touch point coordinates (x, y) and the exponential compensation coefficients for the touch point pressure value F to obtain touch point filtering coordinates and touch point filtering pressure values.
In the chalk character implementation method, the handwriting touch point information is subjected to exponential filtering, noise points appearing in the handwriting touch point information are suppressed, and the interference of the noise points is removed, so that the touch points obtained after filtering are closer to the chalk character handwriting track, and the finally obtained chalk character handwriting is more attached to the real written handwriting.
In some embodiments, the index compensation coefficient for the coordinates (x, y) of the touch point is set to 0.65, and the index compensation coefficient for the pressure value F of the touch point is set to 0.9, in which case the filtering operation on the handwriting touch point information is more thorough to remove the noise point, and the final obtained chalk character handwriting is more ideal in fitting effect with the real handwriting. It should be understood by those skilled in the art that the exponential compensation coefficient for the touch point coordinates (x, y) and the exponential compensation coefficient for the touch point pressure value F may also be set to other values closer to 0.65 and 0.9, respectively.
In some optional embodiments of the present invention, the obtaining a radius of the touch point according to the touch point filtering pressure value includes:
calculating a radius coefficient l according to the touch point filtering pressure valuer：
F represents the filtering pressure value of the touch point;
according to the radius coefficient lrCalculating the touch point radius r:
r＝0.72Rmin+|lr|(1.35Rmax-0.72Rmin)
wherein R isminAnd RmaxRespectively representing a preset minimum radius and a preset maximum radius.
It will be understood by those skilled in the art that the preset minimum and maximum radii may be adjusted depending on the different touch screen writing device sizes that are already written on chalk line.
In the chalk character implementation method, the radius of the touch point is obtained according to the touch point filtering pressure value, and the calculation method is an abstraction of the corresponding relation between the thickness of the chalk character handwriting and the pressure of the pen falling point under the real writing condition, so that the condition that the chalk character handwriting changes along with the pressure in the real writing can be accurately reflected.
In some optional embodiments of the present invention, in a chalk-character implementation method, the determining, according to the handwriting framework point information, handwriting connection point information includes:
calculating the connection coefficient l of the handwriting connection point between two adjacent handwriting framework points according to the distance between the two adjacent handwriting framework pointsf：
Wherein, the L represents the distance between the adjacent handwriting framework points, d represents a judgment coefficient, and the initial value of the judgment coefficient is 0;
according to the connection coefficient lfCalculating the connection point radius CPn(r)：
CPn(r)＝OPn-1(r)+lf(OPn(r)-OPn-1(r))
Wherein OPn(r) the architecture point radius, OP, representing the current handwriting architecture pointn-1(r) the architecture point radius, l, representing the previous handwriting architecture pointfRepresenting the connection coefficient of the current handwriting connection point;
according to the connection coefficient lfCalculating the abscissa CP of the connection pointn(x):
CPn(x)＝OPn-1(x)+lf(OPn(x)-OPn-1(x))
Wherein OPn(x) Abscissa, OP, representing the current handwriting structure pointn-1(x) Abscissa, l, representing the point of the handwriting structurefRepresenting the connection coefficient of the current handwriting connection point;
according to the connection coefficient lfCalculating the connection point ordinate CPn(y):
CPn(y)＝OPn-1(y)+lf(OPn(y)-OPn-1(y))
Wherein OPn(y) a vertical coordinate, OP, representing the current handwriting structure pointn-1(y) ordinate, l, representing the handwriting structure pointfThe connection coefficient representing the current handwriting connection point；
For the connection point radius CPn(r) judging, updating the judgment coefficient according to the judgment result, and recalculating to obtain a new connection coefficient lfAnd according to said new connection coefficient lfCalculating to obtain new handwriting connection point information until the judgment coefficient d is larger than the distance L between adjacent handwriting framework points:
according to the formula, according to the connection point radius CPn(r) updating the value of the decision coefficient d under different conditions, and if the updated decision coefficient d is not larger than the point spacing L between the adjacent handwriting frameworks, recalculating according to the updated decision coefficient d to obtain a new connection coefficient LfAnd according to said new connection coefficient lfAnd calculating to obtain new handwriting connection point information. Obtaining a new radius CP of the connection pointnAnd (r) continuing to execute the judgment updating operation until the updated judgment coefficient d is larger than the point spacing L of the adjacent handwriting frameworks.
And determining a plurality of handwriting connection points between two adjacent handwriting framework points to obtain the handwriting connection point information of the handwriting connection points.
In the chalk character implementation method, a plurality of handwriting connection points are determined before the determined adjacent handwriting framework points to serve as connection and supplement between the two adjacent handwriting framework points, the handwriting connection points are determined by a linear interpolation method to serve as supplement of fitting the chalk character handwriting by the handwriting framework points, and the finally determined chalk character handwriting is more accurate and richer in details.
In some optional embodiments of the present invention, in a method for implementing a chalk character, the drawing a chalk character handwriting according to the handwriting framework point information and the handwriting connection point information includes:
forming handwriting unit points by the handwriting framework points and the handwriting connecting points, wherein the handwriting unit point information comprises unit point coordinates and unit point radiuses;
drawing a series of chalk writing unit drawings according to the unit point coordinates and the unit point radiuses, determining the centers of the chalk writing unit drawings according to the unit point coordinates, and determining the sizes of the chalk writing unit drawings according to the unit point radiuses to obtain chalk writing.
In the chalk character implementation method, the handwriting framework points and the handwriting connection points jointly form handwriting unit points, the handwriting unit points serve as minimum basic units for forming chalk character handwriting, the track and thickness of the chalk character handwriting are determined through the unit point coordinates and the unit point radius of each handwriting unit point, then a series of chalk character unit diagrams are drawn, the real handwritten chalk character handwriting can be accurately restored, and the handwriting effect is attractive and smooth.
In a chalk writing implementation method provided by some alternative embodiments of the invention, as shown in fig. 3, the chalk writing unit diagram is composed of a series of discrete points randomly distributed in a circular range, and the size and shape of each discrete point are random.
In the chalk character realization method, after the coordinates of the unit points and the radius of the unit points are determined, a series of chalk writing unit drawings are drawn to finish the final chalk writing, the chalk writing unit drawings are used as the minimum constituting units of the chalk writing, each chalk writing unit drawing is composed of a series of discrete points randomly distributed in a circular range, and the discrete points are random in size and shape, so that the display effect of the chalk characters can be well restored.
In another aspect, the invention further provides a chalk character realizing device.
As shown in fig. 4, some alternative embodiments of the present invention provide a chalk character implementing device, including:
the handwriting input device comprises an architecture point module 1, a handwriting input module and a handwriting output module, wherein the architecture point module is used for receiving a writing touch instruction and obtaining handwriting architecture point information according to the writing touch instruction, and the handwriting architecture point information comprises architecture point coordinates and architecture point radius;
the connection point module 2 is used for determining handwriting connection point information according to the handwriting framework point information, wherein the handwriting connection point information comprises connection point coordinates and connection point radiuses;
and the handwriting realization module 3 is used for drawing the chalk handwriting by combining a preset chalk handwriting unit drawing according to the handwriting framework point information and the handwriting connection point information.
The apparatus of the foregoing embodiment is used to implement the corresponding method in the foregoing embodiment, and has the beneficial effects of the corresponding method embodiment, which are not described herein again.
In another aspect, the invention further provides electronic equipment for realizing the chalk characters.
As shown in fig. 5, some alternative embodiments of the present invention provide a chalk-character-realizing electronic device, which is used for executing the chalk-character-realizing method.
The electronic device comprises one or more processors 4 and a memory 5, one processor 4 being taken as an example in fig. 5.
The electronic device executing the written software flowchart implementation method may further include: an input device 6 and an output device 7.
The processor 4, the memory 5, the input device 6 and the output device 7 may be connected by a bus or other means, as exemplified by the bus connection in fig. 5.
The memory 5 is a non-volatile computer-readable storage medium, and can be used to store non-volatile software programs, non-volatile computer-executable programs, and modules, such as program instructions/modules corresponding to the data recommendation method in the embodiment of the present application (for example, the architecture point module 1, the connection point module 2, and the handwriting implementation module 3 shown in fig. 4). The processor 4 executes various functional applications of the server and data processing by running nonvolatile software programs, instructions and modules stored in the memory 5, namely, the written software flowchart implementing the method of the above-mentioned method embodiment.
The memory 5 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the stored data area may store data created according to the use of the writing software flowchart implementing apparatus, and the like. Further, the memory 5 may include a high speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some embodiments, the memory 5 may optionally include memory located remotely from the processor 4, and these remote memories may be connected to the member user behaviour monitoring device via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 6 can receive input numeric or character information and generate touch instruction input related to user setting and function control of the writing software flowchart implementation device. The output means 7 may comprise a display device such as a display screen.
The one or more modules are stored in the memory 5 and, when executed by the one or more processors 4, perform the written software flowchart implementation method of any of the method embodiments described above. The technical effect of the embodiment of the electronic device executing the method for implementing the written software flowchart is the same as or similar to that of any embodiment of the method.
In another aspect, the present invention also provides a computer-readable storage medium storing a computer program, wherein the computer program realizes the steps of the chalk character realization method when executed by a processor.
Some alternative embodiments of the present invention provide a computer storage medium having stored thereon computer-executable instructions for performing the method of implementing the written software flowchart of any of the above-described method embodiments. The technical effect of the embodiment of the computer storage medium is the same as or similar to that of any of the method embodiments described above. Finally, it should be noted that, as will be understood by those skilled in the art, all or part of the processes in the methods of the above embodiments may be implemented by a computer program that can be stored in a computer-readable storage medium and that, when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like. The technical effect of the embodiment of the computer program is the same as or similar to that of any of the method embodiments described above.
In addition, the apparatuses, devices and the like disclosed in the present disclosure may be various electronic terminal devices, such as a mobile phone, a Personal Digital Assistant (PDA), a tablet computer (PAD), a smart television and the like, or may be a large terminal device, such as a server and the like, and therefore the scope of protection of the present disclosure should not be limited to a specific type of apparatus, device. The client disclosed by the invention can be applied to any one of the electronic terminal devices in the form of electronic hardware, computer software or a combination of the electronic hardware and the computer software.
Furthermore, the method disclosed according to the present invention may also be implemented as a computer program executed by a CPU, which may be stored in a computer-readable storage medium. The computer program, when executed by the CPU, performs the above-described functions defined in the method disclosed in the present invention.
Further, the above method steps and system elements may also be implemented using a controller and a computer readable storage medium for storing a computer program for causing the controller to implement the functions of the above steps or elements.
Further, it should be appreciated that the computer-readable storage media (e.g., memory) described herein can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. By way of example, and not limitation, nonvolatile memory can include Read Only Memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM), which can act as external cache memory. By way of example and not limitation, RAM is available in a variety of forms such as synchronous RAM (DRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The storage devices of the disclosed aspects are intended to comprise, without being limited to, these and other suitable types of memory.
Those of skill would further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the disclosure herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as software or hardware depends upon the particular application and design constraints imposed on the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.
The various illustrative logical blocks, modules, and circuits described in connection with the disclosure herein may be implemented or performed with the following components designed to perform the functions described herein: a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination of these components. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
The steps of a method or algorithm described in connection with the disclosure herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. The ASIC may reside in a user terminal. In the alternative, the processor and the storage medium may reside as discrete components in a user terminal.
In one or more exemplary designs, the functions may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer. By way of example, and not limitation, such computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. Disk and disc, as used herein, includes Compact Disc (CD), laser disc, optical disc, Digital Versatile Disc (DVD), floppy disk, blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.
Disclosed exemplary embodiments should be noted, however, that various changes and modifications could be made herein without departing from the scope of the disclosure as defined by the appended claims. The functions, steps and/or actions of the method claims in accordance with the disclosed embodiments described herein need not be performed in any particular order. Furthermore, although elements of the disclosure may be described or claimed in the singular, the plural is contemplated unless limitation to the singular is explicitly stated.
It should be understood that, as used herein, the singular forms "a," "an," "the" are intended to include the plural forms as well, unless the context clearly supports the exception. It should also be understood that "and/or" as used herein is meant to include any and all possible combinations of one or more of the associated listed items.
The above-mentioned serial numbers of the embodiments of the present disclosure are merely for description and do not represent the merits of the embodiments.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to these examples; within the idea of an embodiment of the invention, also technical features in the above embodiment or in different embodiments may be combined and there are many other variations of the different aspects of an embodiment of the invention as described above, which are not provided in detail for the sake of brevity. Therefore, any omissions, modifications, substitutions, improvements, and the like that may be made without departing from the spirit and principles of the embodiments of the present invention are intended to be included within the scope of the embodiments of the present invention.
Claims (10)
1. A method for realizing chalk characters is characterized by comprising the following steps:
receiving a writing touch instruction, and obtaining handwriting framework point information according to the writing touch instruction, wherein the handwriting framework point information comprises framework point coordinates and framework point radius; the receiving of the writing touch instruction and the obtaining of the handwriting framework point information according to the writing touch instruction comprise:
obtaining handwriting touch point information according to the writing touch instruction, wherein the handwriting touch point information comprises touch point coordinates and touch point touch time;
obtaining the moving speed of the touch point according to the coordinates of the touch point and the touch time of the touch point, wherein the handwriting touch point information also comprises the moving speed of the touch point;
obtaining a touch point pressure value according to the touch point moving speed, wherein the handwriting touch point information also comprises the touch point pressure value;
filtering the handwriting touch point information to obtain touch point filtering information, wherein the touch point filtering information comprises touch point filtering coordinates and touch point filtering pressure values;
obtaining the radius of the touch point according to the touch point filtering pressure value;
determining the handwriting framework point information according to the touch point filtering coordinate and the touch point radius, wherein the framework point coordinate is the touch point filtering coordinate, and the framework point radius is the touch point radius;
determining handwriting connection point information according to the handwriting framework point information, wherein the handwriting connection point information comprises connection point coordinates and connection point radiuses; determining handwriting connection point information according to the handwriting architecture point information, including:
calculating the connection coefficient l of the handwriting connection point between two adjacent handwriting framework points according to the distance between the two adjacent handwriting framework pointsf：
Wherein, the L represents the distance between the adjacent handwriting framework points, d represents a judgment coefficient, and the initial value of the judgment coefficient is 0;
according to the connection coefficient lfCalculating the connection point radius CPn(r)：
CPn(r)＝OPn-1(r)+lf(OPn(r)-OPn-1(r))
Wherein OPn(r) the architecture point radius, OP, representing the current handwriting architecture pointn-1(r) the architecture point radius, l, representing the previous handwriting architecture pointfRepresenting the connection coefficient of the current handwriting connection point;
according to the connection coefficient lfCalculating the abscissa CP of the connection pointn(x)
CPn(x)＝OPn-1(x)+lf(OPn(x)-OPn-1(x))
Wherein OPn(x) Abscissa, OP, representing the current handwriting structure pointn-1(x) Abscissa, l, representing the point of the handwriting structurefRepresenting the connection coefficient of the current handwriting connection point;
according to the connection coefficient lfCalculating the connection point ordinate CPn(y):
CPn(y)＝OPn-1(y)+lf(On(y)-OPn-1(y))
Wherein OPn(y) a vertical coordinate, OP, representing the current handwriting structure pointn-1(y) ordinate, l, representing the handwriting structure pointfRepresenting the connection coefficient of the current handwriting connection point;
for the connection point radius CPn(r) judging, updating the judgment coefficient according to the judgment result, and recalculating to obtain a new connection coefficient lfAnd according to said new connection coefficient lfCalculating to obtain new handwriting connection point information until the judgment coefficient d is larger than the phaseConstructing a point spacing L' adjacent to the handwriting:
thus, a plurality of handwriting connection points between two adjacent handwriting framework points are determined, and the handwriting connection point information of the handwriting connection points is obtained;
and drawing the chalk writing according to the handwriting framework point information and the handwriting connection point information by combining a preset chalk writing unit drawing.
2. The method according to claim 1, wherein the obtaining the touch point moving speed according to the touch point coordinates and the touch point touch time comprises:
obtaining the touch point distance between the current handwriting touch point and the previous handwriting touch point according to the touch point coordinates of the current handwriting touch point and the touch point coordinates of the previous handwriting touch point;
obtaining the touch time difference between the current handwriting touch point and the previous handwriting touch point according to the touch time of the touch point of the current handwriting touch point and the touch time of the touch point of the previous handwriting touch point;
and obtaining the moving speed of the touch point of the current handwriting touch point according to the distance of the touch point and the touch time difference.
3. The method according to claim 1, wherein the obtaining a touch point pressure value according to the touch point moving speed comprises:
setting a moving speed standard value K and setting an original pressure value as 1, wherein when the moving speed of the touch point is equal to the moving standard value K, the touch point pressure value is 1;
the touch point PnThe touch point pressure value of (1):
wherein, FnThe touch point pressure value, F, representing the current touch point, i.e. the nth touch pointn-1And the pressure value of the touch point representing the previous touch point, v represents the moving speed of the touch point, and K represents a standard value of the moving speed.
4. The method according to claim 1, wherein the filtering the handwriting touch point information to obtain touch point filtering information comprises:
the current handwriting touch point may be represented as:
Pn((x,y),t,v,F)
wherein (x, y) represents the coordinates of the touch point, t represents the touch time of the touch point, v represents the moving speed of the touch point, and F represents the pressure value of the touch point;
touch control of a sequence of points with a stylus (P)1，P2，P3，…，Pm-1，Pm) Representing the handwriting, and circularly reading the handwriting touch point information in the handwriting touch point sequence;
setting an exponential compensation coefficient for the touch point coordinates (x, y) to be 0.65, and setting an exponential compensation coefficient for the touch point pressure value F to be 0.9;
and respectively performing exponential filtering processing on the touch point coordinates (x, y) and the touch point pressure value F according to the exponential compensation coefficients for the touch point coordinates (x, y) and the exponential compensation coefficients for the touch point pressure value F to obtain touch point filtering coordinates and touch point filtering pressure values.
5. The method of claim 1, wherein the obtaining the touch point radius according to the touch point filtering pressure value comprises:
calculating a radius coefficient l according to the touch point filtering pressure valuer：
F' represents the touch point filtering pressure value;
according to the radius coefficient lrCalculating the touch point radius r:
r＝0.72Rmin+|lr|(1.35Rmax-0.72Rmin)
wherein R isminAnd RmaxRespectively representing a preset minimum radius and a preset maximum radius.
6. The method according to claim 1, wherein the drawing chalk writing according to the writing architecture point information and the writing connection point information and in combination with a preset chalk writing unit drawing comprises:
forming handwriting unit points by the handwriting framework points and the handwriting connecting points, wherein the handwriting unit point information comprises unit point coordinates and unit point radiuses;
drawing a series of chalk writing unit drawings according to the unit point coordinates and the unit point radiuses, determining the centers of the chalk writing unit drawings according to the unit point coordinates, and determining the sizes of the chalk writing unit drawings according to the unit point radiuses to obtain chalk writing.
7. A method as claimed in claim 6, wherein the chalk writing unit map is composed of a series of discrete points randomly distributed within a circle, each of the discrete points being of random size and shape.
8. A chalk character realizing device, comprising:
the handwriting input device comprises a writing touch instruction, an architecture point module and a handwriting input module, wherein the writing touch instruction is used for writing handwriting on a handwriting input device; the receiving of the writing touch instruction and the obtaining of the handwriting framework point information according to the writing touch instruction comprise:
obtaining handwriting touch point information according to the writing touch instruction, wherein the handwriting touch point information comprises touch point coordinates and touch point touch time;
obtaining the moving speed of the touch point according to the coordinates of the touch point and the touch time of the touch point, wherein the handwriting touch point information also comprises the moving speed of the touch point;
obtaining a touch point pressure value according to the touch point moving speed, wherein the handwriting touch point information also comprises the touch point pressure value;
filtering the handwriting touch point information to obtain touch point filtering information, wherein the touch point filtering information comprises touch point filtering coordinates and touch point filtering pressure values;
obtaining the radius of the touch point according to the touch point filtering pressure value;
determining the handwriting framework point information according to the touch point filtering coordinate and the touch point radius, wherein the framework point coordinate is the touch point filtering coordinate, and the framework point radius is the touch point radius;
the connecting point module is used for determining handwriting connecting point information according to the handwriting framework point information, and the handwriting connecting point information comprises connecting point coordinates and connecting point radius; determining handwriting connection point information according to the handwriting architecture point information, including:
calculating the connection coefficient l of the handwriting connection point between two adjacent handwriting framework points according to the distance between the two adjacent handwriting framework pointsf：
Wherein L' represents the distance between the adjacent handwriting framework points, d represents a judgment coefficient, and the initial value of the judgment coefficient is 0;
according to the connection coefficient lfCalculating the connection point radius CPn(r)：
CPn(r)＝OPn-1(r)+lf(OPn(r)-OPn-1(r))
Wherein OPn(r) the architecture point radius, OP, representing the current handwriting architecture pointn-1(r) the architecture point radius, l, representing the previous handwriting architecture pointfRepresenting the connection coefficient of the current handwriting connection point;
according to the connection coefficient lfCalculating the abscissa CP of the connection pointn(x)
CPn(x)＝OPn-1(x)+lf(OPn(x)-OPn-1(x))
Wherein OPn(x) Abscissa, OP, representing the current handwriting structure pointn-1(x) Abscissa, l, representing the point of the handwriting structurefRepresenting the connection coefficient of the current handwriting connection point;
according to the connection coefficient lfCalculating the connection point ordinate CPn(y):
CPn(y)＝OPn-1(y)+lf(OPn(y)-OPn-1(y))
Wherein OPn(y) a vertical coordinate, OP, representing the current handwriting structure pointn-1(y) ordinate, l, representing the handwriting structure pointfRepresenting the connection coefficient of the current handwriting connection point;
for the connection point radius CPn(r) judging, updating the judgment coefficient according to the judgment result, and recalculating to obtain a new connection coefficient lfAnd according to said new connection coefficient lfCalculating to obtain new handwriting connection point information until the judgment coefficient d is larger than the distance L' between adjacent handwriting framework points:
thus, a plurality of handwriting connection points between two adjacent handwriting framework points are determined, and the handwriting connection point information of the handwriting connection points is obtained;
and the handwriting realization module is used for drawing the chalk handwriting by combining a preset chalk handwriting unit drawing according to the handwriting framework point information and the handwriting connection point information.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method according to any of claims 1-7 when executing the program.
10. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 7.
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