CN114237417A - Handwriting erasing method, system, device and medium for electronic whiteboard - Google Patents
Handwriting erasing method, system, device and medium for electronic whiteboard Download PDFInfo
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- 238000004590 computer program Methods 0.000 claims description 19
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- 241000227425 Pieris rapae crucivora Species 0.000 abstract description 3
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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
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
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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
Abstract
The application relates to a handwriting erasing method, a handwriting erasing system, an electronic device and a storage medium of an electronic whiteboard, receiving touch data, and based on the touch data, analyzing the touch points, calculating the touch area, if the touch area is larger than a preset value, judging the current touch operation as an erasing operation, generating an eraser pattern, wherein the eraser pattern moves along with the erasing operation, the method for erasing the covered handwriting does not need to manually select a mode for switching the modes when the erasing operation is performed, saves a large amount of time and improves the working efficiency compared with the prior mode which needs manual switching, and the generated eraser is similar to the experience of erasing handwriting with an eraser when erasing notes of a common white board, therefore, the operation experience of the user is improved, and the problems that the operation is complex, the use habit of the user is not met and the use efficiency is low in the related technology are solved.
Description
Technical Field
The present application relates to the field of information teaching technologies, and in particular, to a handwriting erasing method and system for an electronic whiteboard, an electronic device, and a storage medium.
Background
Nowadays, electronic whiteboard has been widely used in the teaching field, and although people's work and learning efficiency have greatly been promoted, there are a lot of problems in current electronic whiteboard, on the one hand, under the actual teaching application scene, for example: in a course which saves lessons for 45 minutes or is longer, writing and erasing operations can be frequently used, and before the course is used, the writing and erasing operations can be carried out only by manually switching and selecting corresponding working modes every time, so that the operation is troublesome, a large amount of time is wasted, the teaching efficiency is low, and on the other hand, as is well known, the operation method of the common whiteboard is simple, namely writing by using a pen and erasing by using an eraser, the conventional electronic whiteboard needs to manually switch and select the working modes, so that the use habit of a user who uses the common whiteboard for a long time is not met, and the use operation experience of the user is seriously influenced.
At present, no effective solution is provided for the problems of complex operation, no accordance with the use habit of users and low use efficiency when teaching tasks are carried out through the existing electronic whiteboard in the related technology.
Disclosure of Invention
The embodiment of the application provides a handwriting erasing method, a handwriting erasing system, an electronic device and a storage medium of an electronic whiteboard, and aims to at least solve the problems that in the related art, the operation is complex, the use habit of a user is not met, and the use efficiency is low.
In a first aspect, an embodiment of the present application provides a handwriting erasing method for an electronic whiteboard, including:
receiving touch data;
analyzing the touch points based on the touch data, and calculating the touch area;
if the touch area is larger than a preset value, judging that the current touch operation is an erasing operation, and generating an eraser pattern;
and the eraser pattern moves along with the erasing operation to erase the covered handwriting.
In some embodiments, after the calculating the touch area, the method further comprises:
and if the touch area is smaller than or equal to the preset value, judging that the current touch operation is writing operation, and generating writing handwriting.
In some of these embodiments, the generating the writing script comprises:
under the condition that the touch body does not leave the electronic whiteboard, continuously generating corresponding writing handwriting according to the current touch operation;
and under the condition that the touch body leaves the electronic whiteboard, ending the writing operation.
In some of these embodiments, the generating the eraser pattern comprises:
and determining the size of the eraser pattern according to the size of the touch area.
In some of these embodiments, the eraser pattern moves following an erasing operation, erasing the overlaid writing including:
under the condition that the touch body does not leave the electronic whiteboard, if the touch area is smaller than or equal to the preset value, the size of the eraser pattern is a preset minimum value;
and finishing the erasing operation under the condition that the touch body leaves the electronic whiteboard.
In a second aspect, an embodiment of the present application provides a handwriting erasing system for an electronic whiteboard, including:
the receiving unit is used for receiving touch data;
the computing unit is used for analyzing the touch points and computing the touch area based on the touch data;
the pattern generation unit is used for judging that the current touch operation is an erasing operation and generating an eraser pattern when the touch area is larger than a preset value;
and the erasing unit is used for erasing the covered handwriting when the eraser pattern moves along with the erasing operation.
In some of these embodiments, the system further comprises:
and the writing unit is used for judging the current touch operation as the writing operation and generating writing handwriting when the touch area is smaller than or equal to the preset value.
In some embodiments, the erasing unit is further configured to set the size of the eraser pattern to a preset minimum value when the touch area is smaller than or equal to the preset value without the touch object leaving the electronic whiteboard; alternatively, the first and second electrodes may be,
the erasing unit is further used for finishing the erasing operation under the condition that the touch body leaves the electronic whiteboard.
In a third aspect, an embodiment of the present application provides an electronic apparatus, which includes a memory, a processor, and a computer program stored on the memory and executable on the processor, and the processor, when executing the computer program, implements the handwriting erasing method of the electronic whiteboard according to the first aspect.
In a fourth aspect, the present application provides a storage medium, on which a computer program is stored, which when executed by a processor implements the handwriting erasing method of the electronic whiteboard as described in the first aspect.
Compared with the prior art that the existing electronic whiteboard can be erased only by manual selection and switching, and a large amount of time is wasted, the method has the advantages that through the steps, under the practical long-time teaching application scene, when a user wants to erase certain characters or patterns on the electronic whiteboard, additional manual operation is not needed, for example, manual switching and selection are not needed, when the touch area is larger than a preset value, the current touch operation is judged to be the erasing operation, compared with the mode that manual switching is needed, a large amount of time is saved, the working efficiency is improved, meanwhile, an eraser pattern is generated to move along with the erasing operation, covered handwriting is erased, the position which the user wants to erase is convenient, and the experience of erasing the handwriting by the eraser is similar to that of a common whiteboard when erasing the handwriting, therefore, the operation experience of the user is improved, and the problems that the operation is complex, the use habit of the user is not met and the use efficiency is low in the related technology are solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a first flowchart of a handwriting erasing method of an electronic whiteboard according to an embodiment of the present application;
fig. 2 is a second flowchart of a handwriting erasing method of an electronic whiteboard according to an embodiment of the present application;
fig. 3 is a third flowchart of a handwriting erasing method of an electronic whiteboard according to an embodiment of the present application;
FIG. 4 is a functional block diagram of a handwriting-erasing system of an electronic whiteboard according to an embodiment of the present application;
fig. 5 is an internal structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided in the present application without any inventive step are within the scope of protection of the present application. Moreover, it should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of ordinary skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments without conflict.
Unless defined otherwise, technical or scientific terms referred to herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which this application belongs. Reference to "a," "an," "the," and similar words throughout this application are not to be construed as limiting in number, and may refer to the singular or the plural. The present application is directed to the use of the terms "including," "comprising," "having," and any variations thereof, which are intended to cover non-exclusive inclusions; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to the listed steps or elements, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Reference to "connected," "coupled," and the like in this application is not intended to be limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Reference herein to "a plurality" means greater than or equal to two. "and/or" describes an association relationship of associated objects, meaning that three relationships may exist, for example, "A and/or B" may mean: a exists alone, A and B exist simultaneously, and B exists alone. Reference herein to the terms "first," "second," "third," and the like, are merely to distinguish similar objects and do not denote a particular ordering for the objects.
Nowadays, electronic whiteboard has been widely used in the teaching field, and although people's work and learning efficiency have greatly been promoted, there are a lot of problems in current electronic whiteboard, on the one hand, under the actual teaching application scene, for example: in a course which saves lessons for 45 minutes or is longer, writing and erasing operations can be frequently used, and before the course is used, the writing and erasing operations can be carried out only by manually switching and selecting corresponding working modes every time, so that the operation is troublesome, a large amount of time is wasted, the teaching efficiency is low, and on the other hand, as is well known, the operation method of the common whiteboard is simple, namely writing by using a pen and erasing by using an eraser, the conventional electronic whiteboard needs to manually switch and select the working modes, so that the use habit of a user who uses the common whiteboard for a long time is not met, and the use operation experience of the user is seriously influenced.
In order to solve the above problems, the present application provides a handwriting erasing method for an electronic whiteboard.
Fig. 1 is a first flowchart of a handwriting erasing method of an electronic whiteboard according to an embodiment of the present application, as shown in fig. 1, in an embodiment of the present invention, the handwriting erasing method of the electronic whiteboard provided by the present invention includes the following steps:
step S101, receiving touch data; it is easy to understand that the touch data is generated by a touch event generated when a hand, an electronic pen, an eraser or other touch tools touches the electronic whiteboard;
step S102, analyzing touch points based on the touch data, and calculating a touch area;
step S103, if the touch area is larger than a preset value, judging that the current touch operation is an erasing operation, and generating an eraser pattern; thus, in practical long-term teaching application scenarios, for example: in a teaching situation in which the class time is 45 minutes, the current touch operation can be directly judged as the erasing operation as long as the touch area is detected to be larger than the preset value, in other words, no other redundant operations are needed except the erasing operation, for example, no manual switching operation is needed; compared with the prior mode of manual switching, the method saves a large amount of time and improves the working efficiency; the generated eraser scheme can be rectangular or elliptical and can be displayed on the electronic whiteboard, so that a user can conveniently check the eraser scheme; the preset value is generally a virtual pixel size obtained by converting half of the size of the real eraser according to the size ratio of the real eraser to the electronic whiteboard, and certainly in some other embodiments, in the case that the screen area of the electronic whiteboard is larger than that of the real eraser, the preset value may also be set to be two thirds of the size of the real eraser and the virtual pixel size obtained by converting the size ratio of the real eraser to the whiteboard, which is not specifically limited herein.
And step S104, the eraser pattern moves along with the erasing operation to erase the covered handwriting. Therefore, the user can conveniently erase the position to be erased, in addition, the generated eraser scheme is similar to the experience of erasing the handwriting by using the eraser when the user erases the notes of the common white board, so that the operation experience of the user is improved, and the problems that the operation is complex, the use habit of the user is not met and the use efficiency is low in the related technology are solved.
Considering that when a user uses an electronic pen book to write on an electronic whiteboard, the contact area between the electronic pen and the electronic whiteboard is relatively small, and when the user uses an eraser to erase the electronic whiteboard, the contact area between the eraser and the electronic whiteboard is relatively large, through the steps S101 to S104, in an actual long-time teaching application scene, when the user wants to erase some characters or patterns on the electronic whiteboard, no additional operation is needed manually, for example, no operation such as manual switching selection is needed, when the touch area is larger than a preset value, the current touch operation is judged as the erase operation, compared with the previous mode that manual switching is needed, a large amount of time is saved, the working efficiency is improved, and an eraser pattern is generated to move along with the erase operation to erase the handwriting covered by the eraser, so that the user can erase the position to be erased conveniently, the generated eraser scheme is similar to the experience of erasing handwriting by using an eraser when a common white board erases notes, so that the operation experience of a user is improved, and the problems that the operation is complex, the use habit of the user is not met and the use efficiency is low in the related technology are solved.
To improve the work efficiency in a long-term teaching environment, in some other embodiments, after the calculating the touch area, the method further includes:
and S105, if the touch area is smaller than or equal to the preset value, judging that the current touch operation is writing operation, and generating writing handwriting. Therefore, extra manual operation is not needed, a large amount of time is saved, especially in an actual long-time teaching application scene, only writing operation is needed, for example, when an electronic pen, a blackboard eraser or other touch tools are used for writing on a blank electronic whiteboard or writing in PPT annotation with characters, when the touch area is smaller than or equal to the preset value, the current touch operation is directly judged to be writing operation, writing handwriting is generated, compared with the previous mode needing manual switching, a large amount of time is saved, and the working efficiency is improved.
Fig. 2 is a second flowchart of a handwriting erasing method of an electronic whiteboard according to an embodiment of the present application, and in order to prevent unstable writing effect caused by shaking due to uneven contact surface, please refer to fig. 2, in some embodiments, the generating of the writing handwriting includes:
step S201, under the condition that the touch body does not leave the electronic whiteboard, continuously generating corresponding writing handwriting according to the current touch operation; thus, the writing stability is improved; that is, the determination area is determined only when the electronic whiteboard is just touched, and the determination area is maintained in an original state as long as the touch body (hand, pen, eraser, or the like) is not lifted up and leaves the whiteboard even if the touch area is changed during the intermediate movement, for example, the determination is performed as a writing operation when the electronic whiteboard is just touched, and the determination is performed in an original state (writing operation) as long as the touch body (hand, pen, eraser, or the like) is not lifted up and leaves the whiteboard even if the touch area is changed during the intermediate movement;
and step S202, under the condition that the touch body leaves the electronic whiteboard, ending the writing operation.
In the previous design, because the actual size of the eraser is not considered, no matter how the touch area changes, the handwriting is erased according to the preset touch area, the user operation experience is poor, and in order to improve the user operation experience, in an embodiment, the generating of the eraser pattern includes:
determining the size of the eraser pattern according to the size of the touch area (namely the size of the contact surface of the actual eraser and the electronic whiteboard); for example, in the erasing operation, if the touch area is increased, the eraser pattern is increased, and if the actual eraser area is decreased, the eraser pattern is decreased, so that the user experience is closer to the experience on the ordinary whiteboard.
Fig. 3 is a third flowchart of a handwriting erasing method of an electronic whiteboard according to an embodiment of the present application, in order to prevent unstable erasing effect caused by shaking due to uneven contact surface, please refer to fig. 3, in some embodiments, the erasing of the overlaid handwriting by the eraser pattern moving along with the erasing operation includes:
step S301, under the condition that the touch body does not leave the electronic whiteboard, if the touch area is smaller than or equal to the preset value, the size of the eraser pattern is a preset minimum value; thus, the stability is improved;
step S302, when the touch object leaves the electronic whiteboard, ending the erasing operation.
After each touch is completed, i.e., after leaving the whiteboard, the writing operation state is returned, and the judgment is made again when the next touch event occurs.
It should be noted that the steps illustrated in the above-described flow diagrams or in the flow diagrams of the figures may be performed in a computer system, such as a set of computer-executable instructions, and that, although a logical order is illustrated in the flow diagrams, in some cases, the steps illustrated or described may be performed in an order different than here.
Fig. 4 is a functional module schematic diagram of a handwriting erasing system of an electronic whiteboard according to an embodiment of the present application, and as shown in fig. 4, this embodiment further provides a handwriting erasing system of an electronic whiteboard, which is used to implement the foregoing embodiment and preferred embodiments, and has already been described and is not described again. As used hereinafter, the terms "module," "unit," "subunit," and the like may implement a combination of software and/or hardware for a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.
In consideration of the fact that the contact area between the electronic pen and the electronic whiteboard is relatively small when a user uses an electronic pen book to write on the electronic whiteboard, and the contact area between the eraser and the electronic whiteboard is relatively large when the user uses the eraser to erase, please refer to fig. 4, the handwriting erasing system of the electronic whiteboard in the embodiment includes:
a receiving unit 41, configured to receive touch data;
a calculating unit 42, configured to analyze the touch points and calculate a touch area based on the touch data;
the pattern generating unit 43 is configured to determine that the current touch operation is an erasing operation and generate an eraser pattern when the touch area is larger than a preset value;
an erasing unit 44 for erasing the overlaid handwriting while the eraser pattern follows the erasing operation.
In this embodiment, the receiving unit 41 receives the touch data, the calculating unit 42 analyzes the touch points based on the touch data, and calculates the touch area, in the actual long-time teaching application scenario, when the user wants to erase some characters or patterns on the electronic whiteboard, and the like, no additional operation is needed manually, for example, no operation such as manual switching selection is needed, the pattern generating unit 43 determines the current touch operation as an erasing operation when the touch area is larger than a preset value, and generates an eraser pattern, which saves a lot of time and improves the working efficiency compared with the previous mode that manual switching is needed, and the erasing unit 44 is used to erase the covered handwriting when the eraser pattern moves along with the erasing operation, thereby facilitating the user to erase the position that the user wants to erase, and the generated eraser pattern is similar to the experience of erasing the handwriting with a common whiteboard when erasing a note, therefore, the operation experience of the user is improved, and the problems that the operation is complex, the use habit of the user is not met and the use efficiency is low in the related technology are solved.
In another embodiment, referring to fig. 4, the system further includes:
and the writing unit 45 is configured to determine that the current touch operation is a writing operation and generate writing handwriting when the touch area is smaller than or equal to the preset value. Therefore, extra manual operation is not needed, a large amount of time is saved, especially in an actual long-time teaching application scene, only writing operation is needed, for example, when an electronic pen, a blackboard eraser or other touch tools are used for writing on a blank electronic whiteboard or writing in a PPT annotation process with characters, and when the touch area is smaller than or equal to the preset value, the current touch operation is directly judged to be writing operation to generate writing handwriting.
In order to prevent the unstable erasing effect caused by the shaking due to the uneven contact surface, referring to fig. 4, in some embodiments, the erasing unit 44 is further configured to set the size of the eraser pattern to a preset minimum value when the touch area is smaller than or equal to the preset value without the touch body leaving the electronic whiteboard; alternatively, the first and second electrodes may be,
the erasing unit 44 is further configured to end the erasing operation when the touch-controlled body leaves the electronic whiteboard.
The above modules may be functional modules or program modules, and may be implemented by software or hardware. For a module implemented by hardware, the modules may be located in the same processor; or the modules can be respectively positioned in different processors in any combination.
The present embodiment also provides an electronic device comprising a memory having a computer program stored therein and a processor configured to execute the computer program to perform the steps of any of the above method embodiments.
Optionally, the electronic apparatus may further include a transmission device and an input/output device, wherein the transmission device is connected to the processor, and the input/output device is connected to the processor.
Optionally, in this embodiment, the processor may be configured to execute the following steps by a computer program:
s101, receiving touch data;
s102, analyzing touch points based on the touch data, and calculating a touch area;
s103, if the touch area is larger than a preset value, judging that the current touch operation is an erasing operation, and generating an eraser pattern;
s104, the eraser pattern moves along with the erasing operation to erase the covered handwriting; or the like, or, alternatively,
and S105, if the touch area is smaller than or equal to the preset value, judging that the current touch operation is writing operation, and generating writing handwriting.
It should be noted that, for specific examples in this embodiment, reference may be made to examples described in the foregoing embodiments and optional implementations, and details of this embodiment are not described herein again.
In addition, in combination with the handwriting erasing method of the electronic whiteboard in the above embodiments, the embodiments of the present application may provide a storage medium to implement. The storage medium having stored thereon a computer program; the computer program, when executed by a processor, implements the handwriting erasing method of the electronic whiteboard in any of the above embodiments.
In one embodiment, a computer device is provided, which may be a terminal. The computer device includes a processor, a memory, a network interface, a display screen, and an input device connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a handwriting erasing method of an electronic whiteboard. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the computer equipment, an external keyboard, a touch pad or a mouse and the like.
In one embodiment, fig. 5 is a schematic diagram of an internal structure of an electronic device according to an embodiment of the present application, and as shown in fig. 5, an electronic device is provided, where the electronic device may be a server, and the internal structure diagram may be as shown in fig. 5. The electronic device comprises a processor, a network interface, an internal memory and a non-volatile memory connected by an internal bus, wherein the non-volatile memory stores an operating system, a computer program and a database. The processor is used for providing calculation and control capability, the network interface is used for communicating with an external terminal through network connection, the internal memory is used for providing an environment for an operating system and the running of a computer program, the computer program is executed by the processor to realize a handwriting erasing method of the electronic whiteboard, and the database is used for storing data.
Those skilled in the art will appreciate that the configuration shown in fig. 5 is a block diagram of only a portion of the configuration associated with the present application, and does not constitute a limitation on the electronic device to which the present application is applied, and a particular electronic device may include more or less components than those shown in the drawings, or may combine certain components, or have a different arrangement of components.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile 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) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
It should be understood by those skilled in the art that various features of the above-described embodiments can be combined in any combination, and for the sake of brevity, all possible combinations of features in the above-described embodiments are not described in detail, but rather, all combinations of features which are not inconsistent with each other should be construed as being within the scope of the present disclosure.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A handwriting erasing method of an electronic whiteboard is characterized by comprising the following steps:
receiving touch data;
analyzing the touch points based on the touch data, and calculating the touch area;
if the touch area is larger than a preset value, judging that the current touch operation is an erasing operation, and generating an eraser pattern;
and the eraser pattern moves along with the erasing operation to erase the covered handwriting.
2. The method of claim 1, wherein after the calculating the touch area, the method further comprises:
and if the touch area is smaller than or equal to the preset value, judging that the current touch operation is writing operation, and generating writing handwriting.
3. The method of claim 2, wherein the generating writing scripts comprises:
under the condition that the touch body does not leave the electronic whiteboard, continuously generating corresponding writing handwriting according to the current touch operation;
and under the condition that the touch body leaves the electronic whiteboard, ending the writing operation.
4. The method of claim 1, wherein the generating a eraser pattern comprises:
and determining the size of the eraser pattern according to the size of the touch area.
5. The method of claim 1, wherein the eraser pattern moves following an erasing operation, erasing the overlaid writing comprising:
under the condition that the touch body does not leave the electronic whiteboard, if the touch area is smaller than or equal to the preset value, the size of the eraser pattern is a preset minimum value;
and finishing the erasing operation under the condition that the touch body leaves the electronic whiteboard.
6. A handwriting erasing system of an electronic whiteboard, comprising:
the receiving unit is used for receiving touch data;
the computing unit is used for analyzing the touch points and computing the touch area based on the touch data;
the pattern generation unit is used for judging that the current touch operation is an erasing operation and generating an eraser pattern when the touch area is larger than a preset value;
and the erasing unit is used for erasing the covered handwriting when the eraser pattern moves along with the erasing operation.
7. The system of claim 6, further comprising:
and the writing unit is used for judging the current touch operation as the writing operation and generating writing handwriting when the touch area is smaller than or equal to the preset value.
8. The system of claim 6, wherein the erasing unit is further configured to set the size of the eraser pattern to a preset minimum value when the touch area is less than or equal to the preset value without the touch object leaving the electronic whiteboard; alternatively, the first and second electrodes may be,
the erasing unit is further used for finishing the erasing operation under the condition that the touch body leaves the electronic whiteboard.
9. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the computer program to execute the handwriting erasing method of the electronic whiteboard according to any one of claims 1 to 5.
10. A storage medium having stored thereon a computer program, wherein the computer program is arranged to execute a handwriting erasing method of an electronic whiteboard according to any one of claims 1 to 5 when running.
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