CN114415918A - Electronic equipment, method and device for simulating pen touch and computer readable medium - Google Patents
Electronic equipment, method and device for simulating pen touch and computer readable medium Download PDFInfo
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- CN114415918A CN114415918A CN202210063787.0A CN202210063787A CN114415918A CN 114415918 A CN114415918 A CN 114415918A CN 202210063787 A CN202210063787 A CN 202210063787A CN 114415918 A CN114415918 A CN 114415918A
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 230000005484 gravity Effects 0.000 claims abstract description 76
- 238000005070 sampling Methods 0.000 claims abstract description 18
- 238000004590 computer program Methods 0.000 claims description 9
- 230000035945 sensitivity Effects 0.000 claims description 4
- 238000004422 calculation algorithm Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 8
- 230000004044 response Effects 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 description 5
- 238000004088 simulation Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 230000001815 facial effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012795 verification Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
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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
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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
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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 discloses an electronic device, a method and a device for simulating pen touch and a computer readable medium, wherein the method comprises the following steps: setting the reference width, the speed specific gravity parameter and the pressure specific gravity parameter of the stroke; acquiring writing data of each writing point and writing the writing data into a sampling list; calculating the speed of each writing point by using the coordinate of each writing point; calculating the real width of each writing point; drawing circles by taking the coordinate of each writing point as the center of a circle and the real width of the writing point as the diameter, and drawing the circumscribed line of two adjacent circles; and filling a graph formed by a union set of two circles of two adjacent writing points and two external tangents in sequence to finally obtain the simulated pen touch. According to the invention, the simulated stroke is obtained by directly processing the sampling point, the algorithm of the simulated stroke is simplified, the response speed is improved, the real writing effect with thickness variation is realized, and the user experience is good.
Description
Technical Field
The invention relates to the technical field of whiteboards and graffiti software, in particular to electronic equipment, a method and a device for simulating pen touch and a computer readable medium.
Background
The white board and the doodle software are generally applied in daily work and life, and the line width is consistent and the sense of reality is poor when the traditional white board and the doodle software are used for writing.
In order to simulate the real writing effect with thickness change, the Chinese invention patent CN106020865B discloses that the pressure touch screen handwriting input is presented with the characteristics of a pen type, the handwriting of two adjacent points on each stroke track is presented, 8-1 points are inserted in the two points at equal distance, 8-1 handwriting presenting widths are linearly inserted according to the handwriting presenting widths of the two adjacent points on the track being 8-1 points, and finally, in 8+1 points, six straight line segments are drawn for all the two adjacent points through the two points and four auxiliary points which are related to the two points, the handwriting presenting widths of the two points and the handwriting inclination angles. The scheme has the problems of complex algorithm and low response speed.
In view of this, it is necessary to improve the existing algorithm for simulating the real writing effect, so as to simplify the algorithm, increase the response speed, and improve the user experience.
Disclosure of Invention
In view of the above-mentioned drawbacks, the technical problem to be solved by the present invention is to provide an electronic device, a method, an apparatus and a computer readable medium for simulating pen strokes, so as to solve the problems of complex algorithm and slow response speed in the prior art.
Therefore, the method for simulating the pen touch based on the writing speed and the pressure parameter, provided by the invention, comprises the following steps of:
setting the reference width, the speed specific gravity parameter and the pressure specific gravity parameter of the stroke;
acquiring writing data of each writing point and writing the writing data into a sampling list, wherein the writing data comprises a coordinate and a pressure value of each writing point;
calculating the speed of each writing point by using the coordinate of each writing point;
calculating a real width of each writing point, which is (velocity × velocity specific gravity parameter + pressure × pressure specific gravity parameter) × a reference width;
drawing circles by taking the coordinate of each writing point as the center of a circle and the real width of the writing point as the diameter, and drawing the circumscribed line of two adjacent circles;
and filling a graph formed by a union set of two circles of two adjacent writing points and two external tangents in sequence to finally obtain the simulated pen touch.
In the method, preferably, in the step of performing functional simulation verification, software for performing the functional simulation verification is preset at a fixed position in a memory when the electronic device is shipped from a factory, and the software for performing the functional simulation verification includes a simulation program of a conventional function of the electronic device.
In the above method, preferably, the reference width is preset to be selected by a user.
In the method, a plurality of speed specific gravity parameters and pressure specific gravity parameters are preset for a user to select.
In the above method, further comprising the steps of:
acquiring physical sign characteristics of a user, wherein the physical sign characteristics at least comprise age and gender;
and automatically matching the speed specific gravity parameter and the pressure specific gravity parameter according to the physical sign information.
In the above method, preferably, the method further comprises the steps of:
acquiring the setting of the speed specific gravity parameter and the pressure specific gravity parameter by a user, and binding the setting with the face characteristics of the user;
acquiring the face characteristics of a user through a camera;
and automatically matching the speed specific gravity parameter and the pressure specific gravity parameter according to the human face characteristics.
The invention also provides a device for simulating pen touch based on writing speed and pressure parameters, which comprises:
the setting unit is used for setting the reference width, the speed specific gravity parameter and the pressure specific gravity parameter of the stroke;
the acquisition unit is used for acquiring writing data of each writing point and writing the writing data into a sampling list, wherein the writing data comprises a coordinate and a pressure value of each writing point;
the calculating unit is used for calculating and obtaining the speed of each writing point by using the coordinate of each writing point; calculating a real width of each writing point, which is (velocity × velocity specific gravity parameter + pressure × pressure specific gravity parameter) × a reference width;
the drawing unit is used for drawing circles by taking the coordinate of each writing point as the center of a circle and the real width of the writing point as the diameter, and drawing the circumscribed line of two adjacent circles; and filling a graph formed by a union set of two circles of two adjacent writing points and two external tangents in sequence to finally obtain the simulated pen touch.
In the above device, preferably, the device further comprises a matching unit for automatically matching the speed specific gravity parameter and the pressure specific gravity parameter according to the physical sign characteristics of the user, wherein the physical sign characteristics are acquired by a camera and include at least age and gender.
In the above apparatus, preferably, the apparatus further comprises:
the user-defined unit is used for acquiring the setting of the speed specific gravity parameter and the pressure specific gravity parameter by a user and binding the setting with the human face characteristics of the user;
and the matching unit is used for automatically matching the speed specific gravity parameter and the pressure specific gravity parameter according to the human face characteristics, wherein the human face characteristics are acquired through a camera.
The present invention also provides an electronic device, comprising: the device comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor is used for implementing the method for simulating pen touch based on writing speed and pressure feeling parameters when executing the computer program stored in the memory.
The present invention also provides a computer-readable medium, on which a computer program is stored, which, when executed by a processor, implements the above-described method of simulating pen strokes based on writing speed and pressure sensitivity parameters.
According to the technical scheme, the electronic equipment, the method and the device for simulating the pen touch and the computer readable medium solve the problems of complex algorithm and low response speed in the prior art.
Compared with the prior art, the invention has the following beneficial effects:
calculating the speed of each writing point by using the coordinate of each writing point, calculating the real width of each writing point by using the speed specific gravity parameter, the pressure specific gravity parameter and the reference width, drawing a circle by using the coordinate of each writing point as the center of a circle and the real width of the writing point as the diameter, and drawing the circumscribed line of two adjacent circles; and filling a graph formed by a union set of two circles of two adjacent writing points and two external tangents in sequence to finally obtain the simulated pen touch. Because the writing points are sampled according to the sampling time, the simulated stroke is obtained by directly processing the sampling points, the algorithm of the simulated stroke is simplified, the response speed is improved, the real writing effect with thickness variation is realized, and the feeling of a user is good.
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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 of the present invention or the prior art will be briefly described and explained. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a flowchart of a method for simulating pen strokes based on writing speed and pressure parameters according to the present invention.
Detailed Description
The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
In order to make the technical solution and implementation of the present invention more clearly explained and illustrated, several preferred embodiments for implementing the technical solution of the present invention are described below.
It should be noted that the terms of orientation such as "inside, outside", "front, back" and "left and right" are used herein as reference objects, and it is obvious that the use of the corresponding terms of orientation does not limit the scope of protection of the present invention.
Referring to fig. 1, fig. 1 is a flowchart of a method for simulating pen strokes based on writing speed and pressure parameters according to the present invention.
As shown in fig. 1, the method for simulating pen strokes based on writing speed and pressure parameters provided by the invention is used for simulating real writing effect with thickness variation when writing or drawing strokes in a whiteboard or graffiti software, and comprises the following steps:
step 110, setting the reference width BW (BaseWidth), the velocity weight parameter VP (velocityProport) and the pressure weight parameter PP (pressureProport) of the stroke.
The reference width BW of the stroke may be preset in software for the user to select. For example: the reference width BW of the stroke is preset to be a plurality of 10 pixels, 20 pixels, 50 pixels, 100 pixels, and the like. When the user uses the apparatus, one of the reference widths BW is selected, for example, a reference width BW of 20 pixels is selected.
In general, the speed specific gravity parameter VP and the pressure specific gravity parameter PP may be preset in software in various ways, and may be selected by a user according to the writing habit thereof.
In another preferred embodiment of the present invention, the velocity specific gravity parameter VP and the pressure specific gravity parameter PP can be automatically matched according to the age, sex, and the like of different users. Specifically, firstly, the physical sign characteristics of a user are acquired through a camera, wherein the physical sign characteristics comprise age, gender and the like; and then, automatically matching the speed specific gravity parameter and the pressure specific gravity parameter according to the physical sign information of the user, so that the users with different sexes and ages can automatically match the corresponding speed specific gravity parameter VP and the corresponding pressure specific gravity parameter PP to obtain a more real simulated pen touch. For example, the simulated strokes of an adult and a child are different.
In another preferred embodiment of the present invention, the speed specific gravity parameter VP and the pressure specific gravity parameter PP can be set individually by the user, and the set parameters are bound to the facial features of the user to become default choices of the user. When the pen touch simulation device is used, the human face characteristics of a user can be acquired through a camera on the electronic equipment, and then the speed specific gravity parameter VP and the pressure specific gravity parameter PP are automatically matched according to the human face characteristics of the user, so that the personalized simulation pen touch is generated.
In the above preferred scheme, the acquisition of the physical characteristics and the facial characteristics can be realized by using the existing mature technology, for example, the technologies of FaceFirst, Amazon knowledge, Paravision, and the like are used to identify the age and the sex, and the technologies of manufacturers such as spacious technology, business soup technology, and the like are used to identify the facial characteristics.
In step 110, the user first needs to select the reference width BW, the speed weight parameter VP and the pressure weight parameter PP of the stroke for subsequent calculation.
And 120, acquiring writing data (xm, ym, pm) of each writing point Wm and writing the writing data into a sampling list, wherein the writing data comprises the coordinate (xm, ym) and the pressure value pm of each writing point Wm.
Where m ranges from 1 to N, where N is the number of samples of all writing points of the stroke, for example, the data W1 of the first writing point is (200, 200, 20), the data W2 of the second writing point is (200, 202, 25), and the data Wm of the mth writing point is (xm, ym, pm).
And step 130, calculating and obtaining the speed WVm of each writing point Wm by using the coordinates (xm, ym) of each writing point. Here, the speed of the writing start point W1 is 0.
Velocity of writing point Wm
t is the sampling time, i.e. the time interval between two adjacent sampling points.
In step 140, the real width rwm (real wdith) of each writing point Wm is calculated.
The true width RWm is (WVm × VP + Pm × PP) × BW.
And 150, drawing a circle Cm by taking the coordinate of each writing point as a circle center and the actual width Rwm of the writing point as a diameter.
Step 160, polling the sampling list of the writing points, calculating the circumscribed point of the circle Cm of the current writing point and the circle Cm +1 of the next writing point, and drawing two tangent lines Lm1 and Lm2 of the two circles.
And step 170, filling a graph formed by a union set of two circles Cm and Cm +1 and two external tangents Lm1 and Lm2 in sequence, and finally obtaining the simulated brush stroke.
According to the method provided by the invention, the writing points are sampled according to the sampling time, the simulated stroke is obtained by directly processing the sampling points, the equidistant points do not need to be inserted between two stroke points, and six straight line segments do not need to be drawn by using four auxiliary points, so that the algorithm of the simulated stroke is simplified, the response speed is improved, the real writing effect with thickness change is realized, and the user experience is good.
On the basis of the method, the invention also provides a device for simulating pen touch based on writing speed and pressure parameters, which comprises the following steps:
the setting unit is used for setting the reference width, the speed specific gravity parameter and the pressure specific gravity parameter of the stroke;
the acquisition unit is used for acquiring writing data of each writing point and writing the writing data into a sampling list, wherein the writing data comprises a coordinate and a pressure value of each writing point;
the calculating unit is used for calculating and obtaining the speed of each writing point by using the coordinate of each writing point; calculating a real width of each writing point, which is (velocity × velocity specific gravity parameter + pressure × pressure specific gravity parameter) × a reference width;
the drawing unit is used for drawing circles by taking the coordinate of each writing point as the center of a circle and the real width of the writing point as the diameter, and drawing the circumscribed line of two adjacent circles; and filling a graph formed by a union set of two circles of two adjacent writing points and two external tangents in sequence to finally obtain the simulated pen touch.
In the above device, the device further comprises a matching unit for automatically matching the speed specific gravity parameter and the pressure specific gravity parameter according to the physical sign characteristics of the user, wherein the physical sign characteristics are obtained by the camera and at least comprise age and gender.
The user-defined unit is used for acquiring the setting of the speed specific gravity parameter and the pressure specific gravity parameter by a user and binding the setting with the human face characteristics of the user; the matching unit is used for automatically matching the speed specific gravity parameter and the pressure specific gravity parameter according to the face features, wherein the face features are acquired through a camera.
According to the above description of the embodiments, the present invention also provides an electronic device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor is configured to implement the above-mentioned method for simulating pen strokes based on writing speed and pressure sensing parameters when executing the computer program stored in the memory.
The electronic whiteboard is a specific example of the electronic device in the present invention, and certainly, the electronic device in the present invention is not limited to the electronic whiteboard, and may be an intelligent screen, a conference whiteboard, and the like.
The method of simulating pen strokes based on writing speed and pressure parameters described above may be implemented as a computer software program. For example, the present invention also provides a computer-readable medium having stored thereon a computer program which, when executed by a processor, implements the above-described method of simulating pen strokes based on writing speed and pressure sensitivity parameters.
With the above description of the specific embodiments, compared with the prior art, the electronic device, the method for simulating pen touch, the apparatus for simulating pen touch, and the computer-readable medium provided by the invention have the following advantages:
firstly, according to sampling writing points at sampling time, the analog stroke is obtained by directly processing sampling points, the algorithm of the analog stroke is simplified, the response speed is improved, the real writing effect with thickness change is realized, and the feeling of a user is good.
Secondly, the reference width, the speed specific gravity parameter and the pressure specific gravity parameter of the picture can be manually selected, and the real effect is further improved.
Thirdly, the speed specific gravity parameter and the pressure specific gravity parameter can be automatically matched, and the efficiency is improved.
Fourthly, the speed specific gravity parameter and the pressure specific gravity parameter can be customized and matched with the human face characteristics, so that personalized simulated pen strokes are realized.
Finally, it should also be noted that the terms "comprises," "comprising," or any other variation thereof, as used herein, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The present invention is not limited to the above-mentioned preferred embodiments, and any structural changes made under the teaching of the present invention shall fall within the scope of the present invention, which is similar or similar to the technical solutions of the present invention.
Claims (10)
1. A method for simulating pen strokes based on writing speed and pressure parameters comprises the following steps:
setting the reference width, the speed specific gravity parameter and the pressure specific gravity parameter of the stroke;
acquiring writing data of each writing point and writing the writing data into a sampling list, wherein the writing data comprises a coordinate and a pressure value of each writing point;
calculating the speed of each writing point by using the coordinate of each writing point;
calculating a real width of each writing point, which is (velocity × velocity specific gravity parameter + pressure × pressure specific gravity parameter) × a reference width;
drawing circles by taking the coordinate of each writing point as the center of a circle and the real width of the writing point as the diameter, and drawing the circumscribed line of two adjacent circles;
and filling a graph formed by a union set of two circles of two adjacent writing points and two external tangents in sequence to finally obtain the simulated pen touch.
2. The method of claim 1, wherein the reference width is predetermined for selection by a user.
3. The method of claim 1, wherein the speed specific gravity parameter and the pressure specific gravity parameter are preset in a plurality of types for selection by a user.
4. The method of claim 1, further comprising the steps of:
acquiring physical sign characteristics of a user, wherein the physical sign characteristics at least comprise age and gender;
and automatically matching the speed specific gravity parameter and the pressure specific gravity parameter according to the physical sign information.
5. The method of claim 1, further comprising the steps of:
acquiring the setting of the speed specific gravity parameter and the pressure specific gravity parameter by a user, and binding the setting with the face characteristics of the user;
acquiring the face characteristics of a user through a camera;
and automatically matching the speed specific gravity parameter and the pressure specific gravity parameter according to the human face characteristics.
6. A device for simulating pen strokes based on writing speed and pressure parameters, comprising:
the setting unit is used for setting the reference width, the speed specific gravity parameter and the pressure specific gravity parameter of the stroke;
the acquisition unit is used for acquiring writing data of each writing point and writing the writing data into a sampling list, wherein the writing data comprises a coordinate and a pressure value of each writing point;
the calculating unit is used for calculating and obtaining the speed of each writing point by using the coordinate of each writing point; calculating a real width of each writing point, which is (velocity × velocity specific gravity parameter + pressure × pressure specific gravity parameter) × a reference width;
the drawing unit is used for drawing circles by taking the coordinate of each writing point as the center of a circle and the real width of the writing point as the diameter, and drawing the circumscribed line of two adjacent circles; and filling a graph formed by a union set of two circles of two adjacent writing points and two external tangents in sequence to finally obtain the simulated pen touch.
7. The device according to claim 6, further comprising a matching unit for automatically matching the speed specific gravity parameter and the pressure specific gravity parameter according to the physical sign characteristics of the user, wherein the physical sign characteristics are obtained by a camera and include at least age and gender.
8. The apparatus of claim 6, further comprising:
the user-defined unit is used for acquiring the setting of the speed specific gravity parameter and the pressure specific gravity parameter by a user and binding the setting with the human face characteristics of the user;
and the matching unit is used for automatically matching the speed specific gravity parameter and the pressure specific gravity parameter according to the human face characteristics, wherein the human face characteristics are acquired through a camera.
9. An electronic device, comprising: memory, processor and computer program stored in the memory and executable on the processor, characterized in that the processor is adapted to implement the method of simulating pen strokes based on writing speed and pressure sensitivity parameters according to any of claims 1 to 5 when executing the computer program stored in the memory.
10. A computer-readable medium, on which a computer program is stored which, when being executed by a processor, carries out the method of simulating pen strokes based on writing speed and pressure sensitivity parameters according to any one of claims 1 to 5.
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| CN202210063787.0A CN114415918A (en) | 2022-01-20 | 2022-01-20 | Electronic equipment, method and device for simulating pen touch and computer readable medium |
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| CN202210063787.0A CN114415918A (en) | 2022-01-20 | 2022-01-20 | Electronic equipment, method and device for simulating pen touch and computer readable medium |
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| CN114924658A (en) * | 2022-05-31 | 2022-08-19 | 青岛海信移动通信技术股份有限公司 | Terminal equipment and handwriting generation method |
| CN115083230A (en) * | 2022-07-15 | 2022-09-20 | 北京博学广阅教育科技有限公司 | Learning assisting method and device |
| CN115205423A (en) * | 2022-09-19 | 2022-10-18 | 北京猎户座信息技术有限公司 | Handwriting method and system based on electronic equipment |
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