WO2023020047A1

WO2023020047A1 - Electronic handwriting writing and erasing method, storage medium, and device

Info

Publication number: WO2023020047A1
Application number: PCT/CN2022/093047
Authority: WO
Inventors: 邓海
Original assignee: 深圳市灵畅互动科技有限公司
Priority date: 2021-08-20
Filing date: 2022-05-16
Publication date: 2023-02-23
Also published as: CN113608667A

Abstract

An electronic handwriting writing and erasing method, relating to the technical field of electronic handwriting processing. The method comprises: reading and storing touch information; according to a preset threshold value, determining whether writing or erasing is performed; if erasing is performed, entering erasure processing, and erasing the electronic handwriting of an electronic page according to current touch information; and if writing is performed, entering writing processing, and performing new electronic handwriting writing on the electronic page. The present method is used for synchronously improving the erasing of the electronic handwriting when a physical handwriting of an electronic whiteboard or an intelligent blackboard is erased, and intelligently determining, during writing or erasing, whether the electronic handwriting is stored. The user operation is convenient, and the efficiency is high.

Description

A method, storage medium and device for writing and erasing electronic handwriting

technical field

The invention relates to the technical field of electronic handwriting processing, in particular to an electronic handwriting writing and erasing method, storage medium and equipment.

Background technique

When writing on the electronic whiteboard or electronic blackboard, a handwriting window can be generated, the user can write in the handwriting window, and the handwriting window can display written electronic handwriting. The user can also erase the written electronic handwriting in the handwriting window.

technical problem

When erasing electronic handwriting, an erasing image can be rendered in the handwriting window, and the electronic handwriting covered by the erasing image can be re-rendered to realize the erasing function. However, the operation is complicated and the efficiency is low.

technical solution

The object of the present invention is to provide a method for writing and erasing electronic handwriting, a storage medium and a device, so as to solve the technical problems existing in the prior art. The many technical effects that can be produced by the preferred technical solutions among the many technical solutions provided by the present invention are described in detail below.

In order to achieve the above object, the present invention provides the following technical solutions: provide a method for erasing electronic handwriting, comprising the following steps:

S20. Read and save the touch information;

S25, judge whether to write or erase according to the preset threshold value; if it is to erase, then enter step S30; if it is to write, then enter step S50; if not, then enter step S26; the threshold value is to judge whether to write or erase Threshold of removal;

S26: Perform operations other than erasing or writing, and return to step S20;

S30, judging whether the last touch operation of the touch information is erasing, if so, proceed to step S40, otherwise proceed to step S35;

S35. Save the current electronic page, and set the current electronic page as the i-th page;

S40. According to the current touch information, erase the electronic handwriting corresponding to the electronic page on the i-th page, and return to step S20;

S50. Determine whether the last touch operation of the touch information is writing or erasing; if it is erasing, go to step S60; if it is writing, go to step S90;

S60, judging whether all the electronic handwriting on the electronic page has been erased; if not, enter step S70; if yes, enter step S80;

S70, judging whether to save as a partially erased electronic page according to preset settings; if so, proceed to step S80; otherwise, proceed to step S90;

S80. Determine whether the previously saved partially erased electronic page has the electronic handwriting, if so, save the previously partially erased electronic page as the i-th page, and create a new electronic page as the i-th page +1 page, i=i+1, enter step S90; if no, then directly enter step S90;

S90. Perform new writing of the electronic handwriting on the current electronic page, and return to step S20.

Preferably, before said S20, it also includes the steps of:

S10. Preset the size and shape of the smart eraser, the threshold value, and whether to save partially erased electronic pages.

Preferably, said S40 specifically includes the following steps:

S41. Read the touch information of the smart eraser, and calculate the tilt angle of the smart eraser; the touch information includes touch point, touch size, touch time and touch track;

S42. Calculate electronic handwriting to be erased according to the touch information and the tilt angle;

S43. Erase the electronic handwriting.

Preferably, the shape of the smart eraser is round, rectangular or square.

Preferably, when the smart eraser is circular, the inclination angle of the smart eraser is 0; the S42 specifically includes the following steps:

S4201. Calculate a center point of the touch according to the touch information;

S4202. Calculate an erasing area with the center point as the center and the size of the smart eraser as the diameter, and the erasing area is a circular erasing area;

S4203. Calculate electronic handwriting to be erased according to the circular erasing area.

Preferably, when the smart eraser is rectangular or square; the S42 specifically includes the following steps:

S4211. Calculate the diagonal vertex coordinates of the rectangle of the touched area according to the touch information;

S4212. Calculate the inclination angle according to the vertex coordinates, and then calculate the erasing area, where the erasing area is a rectangular erasing area or a square erasing area;

S4213. Calculate electronic handwriting to be erased according to the rectangular erasing area or the square erasing area.

The present invention also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed, the above-mentioned method for writing and erasing electronic handwriting is realized.

The present invention also provides an electronic handwriting erasing device, comprising:

one or more processors;

The memory is used to store one or more computer programs, and the one or more processors are used to execute the one or more computer programs stored in the memory to enable the one or more processors.

Beneficial effect

The invention is used to improve the synchronous erasure of electronic handwriting when erasing physical handwriting on an electronic whiteboard or smart blackboard, and intelligently judge whether to save electronic handwriting when writing or erasing, which is convenient for users to operate and has high efficiency.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. Those of ordinary skill in the art can also obtain other drawings based on these drawings without creative labor. In the drawings:

Fig. 1 is the schematic flow sheet of the electronic handwriting writing erasing method embodiment of the present invention;

Fig. 2 is the schematic flow chart of the step S40 of the embodiment of the electronic handwriting writing and erasing method of the present invention;

Fig. 3 is the first flow chart schematic diagram of step S42 of the embodiment of the electronic handwriting writing and erasing method of the present invention;

Fig. 4 is a schematic diagram of the second flow chart of step S42 of the embodiment of the method for writing and erasing electronic handwriting according to the present invention.

Embodiments of the present invention

In order to make the purpose, technical solutions and advantages of the present invention clearer, the various exemplary embodiments to be described below will refer to the accompanying drawings, which constitute a part of the exemplary embodiments, and describe the implementation of the present invention. Various exemplary embodiments that may be employed. Unless indicated otherwise, the same numbers in different drawings identify the same or similar elements. The implementations described in the following exemplary examples do not represent all implementations consistent with the present disclosure. It should be understood that these are merely examples of procedures, methods, apparatus, etc., consistent with aspects of the present disclosure as detailed in the appended claims, and that other embodiments may be used, or alternatives to those set forth herein The embodiments undergo structural and functional modifications without departing from the scope and spirit of the present invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", etc. indicate the orientation or positional relationship based on the drawings, and are only for the convenience of describing the present invention and simplifying the description. Rather than indicating or implying a particular orientation that the referred element must have, be constructed, or operate in a particular orientation. The terms "first", "second", etc. are used for descriptive purposes only, and should not be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. The term "plurality" means two or more. The terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a communication connection, a direct connection, an indirect connection through an intermediary, or two The connectivity within a component or the interaction between two components. The term "and/or" includes any and all combinations of one or more of the associated listed items. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In order to illustrate the technical solutions of the present invention, specific embodiments are used for description below, and only parts related to the embodiments of the present invention are shown.

Embodiment one:

As shown in Figure 1, the present invention provides a kind of electronic handwriting writing and erasing method embodiment, specifically comprise the following steps:

S20. Read and save the touch information;

S26: Perform operation processing other than erasing or writing, and return to step S20; specifically, the operation processing may be operations such as exit, key selection, color change, etc., which are not listed here.

In this embodiment, as shown in FIG. 1, before the S20, further steps are included:

In this embodiment, as shown in FIG. 2, the S40 specifically includes the following steps:

S43. Erase the electronic handwriting.

In this embodiment, the shape of the smart eraser can be round, rectangular or square; of course, it can also be in other shapes, which are not listed here.

As shown in Figure 3, when the smart eraser is circular, the inclination angle of the smart eraser is 0; the S42 specifically includes the following steps:

As shown in Figure 4, when the smart board eraser is rectangular or square; the S42 specifically includes the following steps:

The embodiment is only a specific example, and does not represent such an implementation mode of the present invention.

Embodiment two:

Those skilled in the art can understand that all or part of the features/steps of the above-mentioned method embodiments can be realized by methods, data processing systems or computer programs, and these features can be implemented without hardware, all by software, or by hardware combined with software. The foregoing computer program may be stored in one or more computer-readable storage media, and a computer program is stored on the storage medium. When the computer program is executed (such as by a processor), the execution includes the above-mentioned writing and erasing of electronic handwriting. Steps of a method embodiment.

Embodiment three:

The present invention also provides an embodiment of an electronic handwriting erasing device, including one or more processors and memory; wherein, the memory is used to store one or more computer programs, and the one or more processors are used to execute the memory One or more computer programs are stored to enable the processor to execute the features/steps of the above embodiments of the electronic handwriting erasing method.

After reading the above description, those of ordinary skill in the art should understand that the various features described herein can be implemented by methods, data processing equipment or computer program products. Therefore, these features may be represented partially by hardware, all by software, or a combination of hardware and software. In addition, the above-mentioned features may also be embodied in the form of a computer program product stored on one or more computer-readable storage media, the computer-readable storage medium contains computer-readable program code segments or instructions, which are stored in the storage medium. The readable storage medium is configured to store various types of data to support operations at the device. A readable storage medium may be implemented by any type or combination of volatile or nonvolatile storage devices. Such as static hard disk, random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory ( ROM), optical storage devices, magnetic storage devices, flash memory, magnetic or optical disks, and/or combinations of the above.

The above descriptions are only preferred embodiments of the present invention. Those skilled in the art know that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, the features and examples may be modified to adapt a particular situation and material to the teachings of the invention without departing from the spirit and scope of the invention. Therefore, the present invention is not limited by the specific embodiments disclosed here, and all embodiments falling within the scope of the claims of the present application belong to the protection scope of the present invention.

Claims

A method for erasing electronic handwriting, characterized in that it comprises the following steps:

S20. Read and save the touch information;

S25, judge whether to write or erase according to the preset threshold value; if it is to erase, then enter step S30; if it is to write, then enter step S50; if not, then enter step S26; the threshold value is to judge whether to write or erase Threshold of removal;

S26: Perform operations other than erasing or writing, and return to step S20;

S30, judging whether the last touch operation of the touch information is erasing, if so, proceed to step S40, otherwise proceed to step S35;

S35. Save the current electronic page, and set the current electronic page as the i-th page;

S40. According to the current touch information, erase the electronic handwriting corresponding to the electronic page on the i-th page, and return to step S20;

S50. Determine whether the last touch operation of the touch information is writing or erasing; if it is erasing, go to step S60; if it is writing, go to step S90;

S60, judging whether all the electronic handwriting on the electronic page has been erased; if not, enter step S70; if yes, enter step S80;

S70, judging whether to save as a partially erased electronic page according to preset settings; if so, proceed to step S80; otherwise, proceed to step S90;

S80. Determine whether the previously saved partially erased electronic page has the electronic handwriting, if so, save the previously partially erased electronic page as the i-th page, and create a new electronic page as the i-th page +1 page, i=i+1, enter step S90; if no, then directly enter step S90;

S90. Perform new writing of the electronic handwriting on the current electronic page, and return to step S20.
The method for erasing electronic handwriting according to claim 1, characterized in that, before S20, further comprising the steps of:

S10. Preset the size and shape of the smart eraser, the threshold value, and whether to save partially erased electronic pages.
The writing and erasing method of electronic handwriting according to claim 2, wherein said S40 specifically comprises the following steps:

S41. Read the touch information of the smart eraser, and calculate the inclination angle of the smart eraser; the touch information includes touch point, touch size, touch time and touch track;

S42. Calculate electronic handwriting to be erased according to the touch information and the tilt angle;

S43. Erase the electronic handwriting.
The method for erasing electronic handwriting according to claim 3, wherein the shape of the smart eraser is circular, rectangular or square.
The method for erasing electronic handwriting according to claim 4, wherein when the smart blackboard eraser is circular, the angle of inclination of the smart blackboard eraser is 0; the S42 specifically includes the following steps:

S4201. Calculate a center point of the touch according to the touch information;

S4202. Calculate an erasing area with the center point as the center and the size of the smart eraser as the diameter, and the erasing area is a circular erasing area;

S4203. Calculate electronic handwriting to be erased according to the circular erasing area.
The method for erasing electronic handwriting according to claim 4, wherein when said smart board eraser is rectangular or square; said S42 specifically comprises the following steps:

S4211. Calculate the diagonal vertex coordinates of the rectangle of the touched area according to the touch information;

S4212. Calculate the inclination angle according to the vertex coordinates, and then calculate the erasing area, where the erasing area is a rectangular erasing area or a square erasing area;

S4213. Calculate electronic handwriting to be erased according to the rectangular erasing area or the square erasing area.
A computer-readable storage medium, characterized in that a computer program is stored on the storage medium, and when the computer program is executed, the method for writing and erasing electronic handwriting according to any one of claims 1-6 is implemented.
A device for erasing electronic handwriting is characterized in that it comprises:

one or more processors;

A memory for storing one or more computer programs, one or more of said processors for executing one or more of said memory stored computer programs, so that one or more of said processors can perform as claimed in claim 1- 6. The electronic handwriting writing and erasing method described in any one.