CN103823628A - Calligraphy stoke simulating method combined with pen pressure - Google Patents

Abstract

The invention relates to a calligraphy stoke simulating method combined with pen pressure. The method is applied to a handwriting system and aims to analyze the stroke changes during calligraphy writing with different calligraphy skills combining with handwriting plate pen pressure, different algorithm processing is performed, and accordingly calligraphy effect actually fused with artistic feelings is achieved instead of simple handwriting effect. The method concentrates on protecting the real-time generating algorithms for strokes corresponding to different calligraphy skills.

Description

The Brush calligraphy vigour of style in writing analogy method of pressing in conjunction with pen

Technical field

This technology is mainly used in hand writing system, for example signature, hand-written characters in a fancy style, electronics calligraphy etc., reply needs to show in real time the field of writing effect, technical field has related to the analysis of Brush calligraphy skill and technique, this piece belongs to world of art, system simulation and build and belong to software field, major domain should be software field, the object of algorithm is to create the Brush calligraphy that can write out in real time font and the corresponding vigour of style in writing effect of font, so should be a branch of computer graphics, belong to software field, simultaneously owing to having related to analysis of art, so also can belong to digital art field or technical field of digital media.

Background technology

Have technology to be mostly non real-time, reach corresponding ink and wash effect by broadcast algorithm, normally first typing person's handwriting, then calculates according to notes, last generating pictures; Also there is in addition real-time Brush calligraphy algorithm, what but algorithm itself was focused on is stroke effect, rather than the artistic feeling of Brush calligraphy entirety itself, do not strengthen the vigour of style in writing, can only allow people see and think that this is Brush calligraphy, but but can not write the corresponding skill and technique effect of Brush calligraphy, only has technology in one, the condition of Art Integration not being entered, not analyzing different fonts should have the different vigours of style in writing, and different skills also should have different processing modes.

Summary of the invention

The fundamental purpose of this algorithm invention is to analyze different Brush calligraphy skill and technique and presses the vigour of style in writing while printing calligraphy to change in conjunction with handwriting pad pen, and does different algorithm process, reaches the Brush calligraphy font effect of real fusion artistic feeling, rather than simple hand-written effect.

Brush calligraphy simulation in real time has; do not have but utilize handwriting pad to go to simulate in conjunction with pen pressure the Brush calligraphy system that under different calligraphy skills, the vigour of style in writing changes, this algorithm should be protected emphatically for the corresponding vigour of style in writing of different Brush calligraphy skill and technique and generate in real time modeling algorithm protection.

The following Fig. 1 a of program overall flow figure:

1. the Brush calligraphy vigour of style in writing analogy method of pressing in conjunction with pen, is characterized in that, comprises the steps:

Step 101: obtain input data: the equipment of pressing by obtaining pen, typing writer's a row track.

In the packet importing into each time, should comprise: (1) current pen is pressed Press, and numerical range is 1-100, and it is to represent not touch handwriting pad at 0 o'clock that pen is pressed.

While pressing for pen the data that Press is 0, do not carry out any processing, continue to obtain next handwriting pad bag data.

All pens are pressed and are all needed to recalculate simultaneously, and pen is pressed respective function $y=\left\{\begin{array}{c}\frac{x^2}{64},80>x\≥0\\ 100,x\≥80\end{array}\right.,$ Wherein x is that input pen is pressed, and y is output pen pressure,

(2) current mouse coordinates Position[i]=(x, y), i=0～4, retain minimum 5 latest datas; 5 coordinate datas produce 4 vectors, and then calculate 3 vector angles:

Handwriting pad reality or the movement of operating mouse, so what import into actual is the pixel coordinate of current mouse in screen, scope width should be the wide pixel of 0-screen, is highly the high pixel of 0-screen;

What use when some handwriting pad pixel coordinates is (0-1,0-1) relative Repeat, need in data processing module, change;

Step 102: process input data: hardware device only provides two kinds of data: pen is pressed Press and position Position.Other derivative datas need to be processed in processing module.

Concrete detailed data and account form are as follows:

Frame pitch is from Dis: obtain the coordinate importing in two packets, according to 2 range formulas:

calculate distance, wherein i=0～4, when the cumulative data of Dis is less than 100, five groups of data before preserving since 0, Dis data initial value is-1, it is 0 o'clock zero clearing Dis data that pen is pressed, all initialize-1.Unit is: pixel; X, y refers to pixel coordinate;

The distance accumulated value DisCum of Dis is less than 100, and may to be that equipment is unstable cause, and data can not be used.

Apart from adding up of 5 values of accumulated value DisCum:Dis array, for judging in the stage of starting to write whether displacement has exceeded threshold value.Threshold value is 8% of screen width.

A current line angular separation: the angle that a record row track turns over, by 5 coordinate position data bags that retain, draws 4 vectors, and then calculate angle, according to plane vector angle formulae: establish two vectors and be respectively a=(a ₁, a ₂), b=(b ₁, b ₂), the angle between them is so

utilize afterwards arccos α can draw angle α.Store successively in order 4 angles in array, array initialization is-1, and representative does not have assignment.

Row pen clip angle accumulated value: in array, angle is cumulative, the angle that in five packets, stroke turns over;

Recording pointer is pressed and is changed, and the changing value between twice packet, for positive value specifies pen is pressed in increase, reduces for negative value explanation pen is pressed in;

Image type array: be array type, brush image of each array variable storage.

Step 103: analyze input data: according to the different data and lift a data and do different algorithm process of starting to write.First be the selection of pen, different pens the are corresponding different ink dot of starting to write will have different effects in the time that the mode of starting to write is different; The effect of starting to write is tested acquisition by demonstration.

The variable quantity of pressing according to pen judges, first judgement pen presses Press from 0 to there being numerical value, and it is that positive value specifies is the process of starting to write that pen is pressed a variable quantity PressDis, therefore the time that is pressed with that bag of numerical value at pen is counted, all forces to enter step 103-1 in 1.5 seconds.Pen pressure variable quantity is for negative, and it is the process of starting writing that final pen pressure is 0, enters step 103-2, and other situations enter a row step 103-3.

Step 103-1: the process of starting to write judgement: point two large classes in Writing brush calligraphy of starting to write, Zang Feng and dew peak, hide in cutting edge of a knife or a sword and be divided into and vertically start to write and nib ring method Zang Feng.

In processing, in two kinds of situation, judged from array Dis by frame pitch, as five data accumulated value DisCum of Dis, exceed threshold value, threshold value is 8% of screen pixels width;

In the time that DisCum value exceedes threshold value, do not need to change brush, the first stroke of a Chinese character stage, according to the pen type of selecting, is used in Pen array a brush pattern as brush at random, and Brush Size presses the value that function is corresponding to change according to pen.

In the time that DisCum does not exceed threshold value, be judged as the Zang Feng vertically starting to write,, so every 2 packets are just changed brush pattern one time;

Current brush pattern need to be according to the classification of pen in brush Pen type, under classification, choose at random, for example initial what select is writing brush, so when being judged as while vertically starting to write, often just need to change once through two current brush patterns of packet, until the stage of starting to write finishes; Forward step 104 to;

Step 103-2: the part of starting writing: start writing to be divided into equally and reveal peak and Zang Feng, Zang Feng part and a row same treatment, the Brush Size while hiding cutting edge of a knife or a sword of starting writing presses value corresponding to function to reduce according to pen.

Start writing and reveal peak and be divided into two kinds, the first is to go out normally peak, and one is folding peak, and specific algorithm is: judge PenRCum angle accumulated value, being less than 90 is exactly to go out normally peak, and brush is pressed respective function minimizing according to pen;

It is exactly to roll over peak that PenRCum value is greater than 90, for folding peak, the packet that exceedes 90 degree from PenRCum starts to calculate, retrodict forward, find point that PenRCum value less than 90 spends as starting point, it is No. 5 point that PenRCum exceedes current point after 90 degree, the point that the less than of retrodicting forward 90 is spent is the 2nd point, therefore since the 2nd, with every two packets of follow-up all packets all with starting point No. 2 points form line triangles, follow-up data bag is 3,4, No. 5 points, the asterism forming is so 2,3,4 and 2,4,5 two triangles are filled simultaneously. form thick and heavy folding peak; Forward step 104 to;

Step 103-3:, during row pen, press size according to pen, adjust Brush Size and arrange; Forward step 104 to;

Step 104: output: whole image is stored as to image and is shown on screen.

Accompanying drawing explanation

Fig. 1 a schematic diagram of the present invention

Fig. 1 b pen is pressed large logotype

Fig. 2 writing brush is started to write

Fig. 3 writing brush made of goat's hair is started to write

Fig. 4 Zang Feng that vertically starts to write

Fig. 5 nib ring method Zang Feng

Fig. 6 goes out peak normally

Fig. 7 is folding peak

Fig. 8 is that folding peak forms schematic diagram

embodiment

Go out as shown in Figure 1:

Unit 101: obtain input data: can obtain the equipment that pen is pressed, typing writer's a row track by handwriting pad etc.

In the packet importing into each time, should comprise: (1) current pen is pressed Press, and numerical range is 1-100, and it is to represent not touch handwriting pad at 0 o'clock that pen is pressed.Data in the time approaching handwriting pad, just have been started to transmit according to current writing pencil, but writing pencil does not touch handwriting pad, do not click, but there are Position data, in native system, these class data do not belong to person's handwriting track data, therefore do not carry out any processing in the time that pen presses Press to be 0, continue to obtain next handwriting pad bag data.All pens are pressed and are all needed to recalculate simultaneously, and pen is pressed respective function $y=\left\{\begin{array}{c}\frac{x^2}{64},80>x\≥0\\ 100,x\≥80\end{array}\right.,$ The image x axle of doing nothing is wherein that input pen is pressed, and y presses for output pen, and it is 32 that the actual pen for example obtaining from bag is pressed, and press and should be 16 so, and all pen is pressed and judge all take 16 after converting as calculating standard afterwards according to pen corresponding to function.When its reason is style of writing in earlier stage to start writing, resistance is not constant, but increase gradually, for writer, be easy to cause and start writing overweightly, pen is pressed in the problem that the initial stage increases suddenly, so need a corresponding pen to press a function carry out attenuation transform to it according to writing style, (2) current mouse coordinates Position[i]=(x, y), i=0～4, (5 coordinate datas can produce 4 vectors to retain minimum 5 latest datas, and then calculate 3 vector angles, be less than 5 data angle number be difficult to very little after calculate): handwriting pad reality or the movement of operating mouse, so what import into actual is the pixel coordinate of current mouse in screen, scope width should be (the wide pixel of 0-screen), be highly (the high pixel of 0-screen), note, that some handwriting pad uses is (0-1, 0-1) relative Repeat, need in data processing module, change,

Unit 102: process input data: hardware device only provides two kinds of data: pen is pressed and position.Other derivative datas need to be processed in processing module.Concrete detailed data and account form are as following table:

Unit 103: analyze input data: according to the different data and lift a data and do different algorithm process of starting to write.First be the selection of pen, different pens the are corresponding different ink dot of starting to write will have different effects in the time that the mode of starting to write is different.Fig. 2 and Fig. 3 are the brush of starting to write of the writing brush made of goat's hair and writing brush;

The variable quantity of pressing according to pen judges, first judgement pen presses Press from 0 to there being numerical value, it is that positive value specifies is the process of starting to write that pen is pressed variable quantity PressDis, according to the rule of writing, the vigour of style in writing of starting to write normally completes in 1.5 seconds after starting to write, count therefore be pressed with the time of that bag of numerical value at pen, in 1.5 seconds, all force to enter unit 103-1.Pen pressure variable quantity is for negative, and it is the process of starting writing that final pen pressure is 0, enters unit 103-2, and other situations enter row pens unit 103-3.

Unit 103-1: the process of starting to write judgement: point two large classes in Writing brush calligraphy of starting to write, Zang Feng and dew peak, hide in cutting edge of a knife or a sword and be divided into vertically and start to write (Fig. 4) and nib ring method Zang Feng (Fig. 5).In processing in two kinds of situation, judged from array Dis by frame pitch, as five data accumulated value DisCum of Dis, exceed threshold values, threshold values should change according to distinct device situation, find through overtesting, screen pixels width 8% as threshold values, the screen of for example 1440X900, threshold values is 1440*8%=115.In the time that DisCum value exceedes 115 threshold values, do not need to change brush, the first stroke of a Chinese character stage, according to writing brush or the writing brush made of goat's hair pen type selected, is used a brush pattern in Pen array as brush, to press increase corresponding to function according to pen at random.In the time that DisCum does not exceed threshold values, be judged as the Zang Feng vertically starting to write, the required processing of doing is, as long as DisCum does not exceed threshold values, so every 2 packets are just changed brush pattern one time, in brush Pen type, according to the classification of pen, under classification, choose at random.

Unit 103-2: the part of starting writing: start writing to be divided into equally and reveal peak and Zang Feng, Zang Feng part is identical with row pen, does not need special processing, according to writing brush skill and technique, the Zang Feng that starts writing is hidden in the vigour of style in writing in row style footpath exactly, so Brush Size presses value corresponding to function to reduce according to pen.Start writing and reveal peak and be divided into two kinds, the first is to go out normally peak (Fig. 6), and one is folding peak (Fig. 7), and specific algorithm is: judge PenRCum angle accumulated value, being less than 90 is exactly to go out normally peak, and brush is pressed respective function minimizing according to pen; It is exactly to roll over peak (Fig. 7) that PenRCum value is greater than 90, and for folding peak, the packet that exceedes 90 degree from PenRCum starts to calculate, retrodict forward, find point that PenRCum value less than 90 spends as starting point, in Fig. 8, it is No. 5 point that PenRCum exceedes current point after 90 degree, the point that the less than of retrodicting forward 90 is spent is the 2nd point, therefore since the 2nd, with follow-up all packets (3,4,5) be wired to triangle (Fig. 8), fill, form thick and heavy folding peak.

Unit 103-3: row pen part is not that the present invention discusses part, presses size during row pen according to pen, adjusts Brush Size and arranges

Unit 104: output: whole image is stored as to image and is shown on screen.

Claims (1)

1. the Brush calligraphy vigour of style in writing analogy method of pressing in conjunction with pen, is characterized in that, comprises the steps:

Step 101: obtain input data: the equipment of pressing by obtaining pen, typing writer's a row track;

In the packet importing into each time, should comprise: (1) current pen is pressed Press, and numerical range is 1-100, and it is to represent not touch handwriting pad at 0 o'clock that pen is pressed;

While pressing for pen the data that Press is 0, do not carry out any processing, continue to obtain next handwriting pad bag data;

All pens are pressed and are all needed to recalculate simultaneously, and pen is pressed respective function $y=\left\{\begin{array}{c}\frac{x^2}{64},80>x\≥0\\ 100,x\≥80\end{array}\right.,$ Wherein x is that input pen is pressed, and y is output pen pressure,

(2) current mouse coordinates Position[i]=(x, y), i=0～4, retain minimum 5 latest datas; 5 coordinate datas produce 4 vectors, and then calculate 3 vector angles:

Handwriting pad reality or the movement of operating mouse, so what import into actual is the pixel coordinate of current mouse in screen, scope width should be the wide pixel of 0-screen, is highly the high pixel of 0-screen;

What use when some handwriting pad pixel coordinates is (0-1,0-1) relative Repeat, need in data processing module, change;

Step 102: process input data: hardware device only provides two kinds of data: pen is pressed Press and position Position; Other derivative datas need to be processed in processing module;

Concrete detailed data and account form are as follows:

Frame pitch is from Dis: obtain the coordinate importing in two packets, according to 2 range formulas:

calculate distance, wherein i=0～4, when the cumulative data of Dis is less than 100, five groups of data before preserving since 0, Dis data initial value is-1, it is 0 o'clock zero clearing Dis data that pen is pressed, all initialize-1; Unit is: pixel; X, y refers to pixel coordinate;

The distance accumulated value DisCum of Dis is less than 100, and may to be that equipment is unstable cause, and data can not be used;

Apart from adding up of 5 values of accumulated value DisCum:Dis array, for judging in the stage of starting to write whether displacement has exceeded threshold value; Threshold value is 8% of screen width;

A current line angular separation: the angle that a record row track turns over, by 5 coordinate position data bags that retain, draws 4 vectors, and then calculate angle, according to plane vector angle formulae: establish two vectors and be respectively a=(a ₁, a ₂), b=(b ₁, b ₂), the angle between them is so

utilize afterwards arccos α can draw angle α; Store successively in order 4 angles in array, array initialization is-1, and representative does not have assignment;

Row pen clip angle accumulated value: in array, angle is cumulative, the angle that in five packets, stroke turns over;

Recording pointer is pressed and is changed, and the changing value between twice packet, for positive value specifies pen is pressed in increase, reduces for negative value explanation pen is pressed in;

Image type array: be array type, brush image of each array variable storage;

Step 103: analyze input data: according to the different data and lift a data and do different algorithm process of starting to write; First be the selection of pen, different pens the are corresponding different ink dot of starting to write will have different effects in the time that the mode of starting to write is different; The effect of starting to write is tested acquisition by demonstration;

The variable quantity of pressing according to pen judges, first judgement pen presses Press from 0 to there being numerical value, and it is that positive value specifies is the process of starting to write that pen is pressed a variable quantity PressDis, therefore the time that is pressed with that bag of numerical value at pen is counted, all forces to enter step 103-1 in 1.5 seconds; Pen pressure variable quantity is for negative, and it is the process of starting writing that final pen pressure is 0, enters step 103-2, and other situations enter a row step 103-3;

Step 103-1: the process of starting to write judgement: point two large classes in Writing brush calligraphy of starting to write, Zang Feng and dew peak, hide in cutting edge of a knife or a sword and be divided into and vertically start to write and nib ring method Zang Feng;

In processing, in two kinds of situation, judged from array Dis by frame pitch, as five data accumulated value DisCum of Dis, exceed threshold value, threshold value is 8% of screen pixels width;

In the time that DisCum value exceedes threshold value, do not need to change brush, the first stroke of a Chinese character stage, according to the pen type of selecting, is used in Pen array a brush pattern as brush at random, and Brush Size presses the value that function is corresponding to change according to pen;

In the time that DisCum does not exceed threshold value, be judged as the Zang Feng vertically starting to write,, so every 2 packets are just changed brush pattern one time;

Current brush pattern need to be according to the classification of pen in brush Pen type, under classification, chooses at random, often just needs to change once through two current brush patterns of packet, until the stage of starting to write finishes; Forward step 104 to;

Step 103-2: the part of starting writing: start writing to be divided into equally and reveal peak and Zang Feng, Zang Feng part and a row same treatment, the Brush Size while hiding cutting edge of a knife or a sword of starting writing presses value corresponding to function to reduce according to pen;

Start writing and reveal peak and be divided into two kinds, the first is to go out normally peak, and one is folding peak, and specific algorithm is: judge PenRCum angle accumulated value, being less than 90 is exactly to go out normally peak, and brush is pressed respective function minimizing according to pen;

It is exactly to roll over peak that PenRCum value is greater than 90, for folding peak, the packet that exceedes 90 degree from PenRCum starts to calculate, retrodict forward, find point that PenRCum value less than 90 spends as starting point, it is No. 5 point that PenRCum exceedes current point after 90 degree, the point that the less than of retrodicting forward 90 is spent is the 2nd point, therefore since the 2nd, with every two packets of follow-up all packets all with starting point No. 2 points form line triangles, follow-up data bag is 3,4, No. 5 points, the asterism forming is so 2,3,4 and 2,4,5 two triangles are filled simultaneously. form thick and heavy folding peak; Forward step 104 to;

Step 103-3:, during row pen, press size according to pen, adjust Brush Size and arrange; Forward step 104 to;

Step 104: output: whole image is stored as to image and is shown on screen.

Images