WO2020056619A1

WO2020056619A1 - Method for error detection in text writing, terminal device, and storage medium

Info

Publication number: WO2020056619A1
Application number: PCT/CN2018/106461
Authority: WO
Inventors: 张宏雷
Original assignee: 深圳市柔宇科技有限公司
Priority date: 2018-09-19
Filing date: 2018-09-19
Publication date: 2020-03-26
Also published as: CN112639712A

Abstract

A method for error detection in text writing, a terminal device, and a storage medium. The method comprises: obtaining contact data of a handwriting of text writing when a user writes text on a writing board, the contact data comprising one or more of contact coordinates, a contact generation time, and a contact pressure value; determining an incorrectly-written stroke in the handwriting according to a text writing rule and the contact data; and controlling to display the handwriting on a display screen, and marking the incorrectly-written stroke. In embodiments of the present invention, error detection can be performed for a stroke in a handwriting, and a wrong stroke can be marked and displayed.

Description

Text writing error detection method, terminal equipment and storage medium

Technical field

The present invention relates to the technical field of data processing, and in particular, to a method for detecting writing errors, a terminal device, and a storage medium.

Background technique

With the development of electronic technology, writing boards came into being, and have been widely used in users' daily learning and work. For example, a user can use a writing pad for writing exercises. Because there is currently no way to detect errors in writing strokes, it is impossible to determine whether there are stroke writing errors during the writing process. Therefore, how to detect errors in the strokes when writing text is an urgent problem that needs to be solved at present.

Summary of the Invention

Embodiments of the present invention provide a method for detecting writing errors, a terminal device, and a storage medium, which can detect errors in writing strokes and mark and display incorrect strokes.

A first aspect of the embodiments of the present invention provides a method for error detection in writing, the method includes:

Acquiring touch point data of a handwriting when a user writes a text when writing on a writing board, the touch point data includes one or more of touch point coordinates, touch point generation time, and touch pressure value;

Determining incorrectly written strokes in the writing handwriting according to the writing rules of the text and the touch point data;

The control displays the writing handwriting on a display screen and marks the incorrectly written stroke.

A second aspect of the embodiments of the present invention provides a terminal device, including: a processor unit and a display screen, where the processor unit is configured to:

And controlling the display of the writing handwriting on the display screen and marking the incorrectly written stroke.

According to a third aspect of the embodiments of the present invention, a storage medium is provided. The storage medium stores text writing error detection instructions. When the text writing error detection instructions are run on a computer, the computer is caused to execute the foregoing text writing error detection method. .

In the embodiment of the present invention, first, contact data of a writing handwriting when a user writes text on a tablet is obtained, and the incorrect strokes written in the writing handwriting are determined according to the writing rules and the contact data, and then displayed on the display Writing handwriting and marking incorrectly written strokes, so that the strokes in the writing handwriting can be checked for errors, and the wrong strokes can be marked and displayed.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. Those skilled in the art can also obtain other drawings according to these drawings without paying creative labor.

FIG. 1 is a schematic architecture diagram of a writing system according to an embodiment of the present invention;

FIG. 2 is a flowchart of a method for detecting writing errors in text writing according to an embodiment of the present invention; FIG.

3 is a schematic diagram of a writing handwriting provided by an embodiment of the present invention;

FIG. 4 is a schematic diagram of a hardware structure of a terminal device according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Please refer to FIG. 1 together. FIG. 1 is a schematic structural diagram of a writing system according to an embodiment of the present invention. The writing system includes a tablet 101 and a terminal device 102, and a communication connection is established between the tablet 101 and the terminal device 102. A Bluetooth (Bluetooth) communication connection may be established between the tablet 101 and the terminal device 102. A communication connection may also be established between the tablet 101 and the terminal device 102 through other communication methods, which is not limited herein. The writing system may further include a writing pen capable of writing on the writing pad 101. The terminal device 102 may be a terminal configured with a display screen and a data processing function, such as a smart phone, a tablet computer, and a mobile Internet device (MID).

In one embodiment, the tablet 101 includes a display screen, and the display screen is disposed on the tablet 101 for displaying writing handwriting generated when a user writes text. The tablet 101 also includes a processor and a transceiver. The terminal device 102 includes a processor, a display screen, and a transceiver. Wherein, the transceiver is a device having data receiving and transmitting functions. The processor of the tablet 101 acquires the contact data of the writing handwriting generated when the user writes characters on the tablet 101, and sends the contact data to the terminal device 102 through the transceiver of the tablet 101. Accordingly, the transceiver of the terminal device 102 receives the contact data. The processor of the terminal device 102 obtains the contact data, and performs error detection on the writing handwriting according to the contact data. The processor of the terminal device 102 controls the display screen to display the writing handwriting, and marks incorrectly written strokes in the writing handwriting. In an embodiment, the writing handwriting may also be directly detected by the tablet 101, and the display screen may be controlled to display the writing handwriting, and the incorrect writing strokes in the writing handwriting may be marked. Each of them will be described in detail below.

Please refer to FIG. 2. FIG. 2 is a schematic flowchart of a text writing error detection method according to an embodiment of the present invention. The text writing error detection method runs on a terminal device 102 or a tablet 101 as shown in FIG. 1. The text writing error detection method includes the following steps:

Step S201: Acquire touch data of a writing handwriting when a user writes a character on a tablet.

In one embodiment, when the text writing error detection method is run on the tablet 101, step S201 is specifically: the tablet 101 directly obtains the touch point data of the writing handwriting generated by the user when writing the text. That is, the contact data of the writing handwriting is collected by the tablet 101.

Specifically, when the text writing error detection method is run on the terminal device 102, step S201 is specifically: the terminal device 102 receives the text sent by the tablet 101 when the user writes the text when the user writes the text. The touch point data of the writing handwriting, that is, the terminal device 102 is the contact point data of the writing handwriting generated when the user writes text from the tablet 101.

The writing handwriting includes one or more strokes, and each stroke includes multiple touch points. During the user's writing process, the tablet 101 collects contact data of each contact in the writing handwriting. The contact data includes one or more of contact coordinates, contact generation time, and contact pressure values. The contact coordinates refer to the coordinates of pixels in a dot matrix formed on the tablet 101 by the center of the contact, for example, (30pixel, 40pixel). The writing board 101 can send the collected contact data of each contact in the writing handwriting to the terminal device 102. The terminal device 102 receives contact data of each contact in the writing handwriting sent by the tablet 101.

Step S202: Determine an incorrectly written stroke in the writing handwriting according to the character writing rule and the touch point data.

In the embodiment of the present invention, the character writing rule includes a stroke writing rule and a stroke order rule, and the character writing rule is stored in the memory of the terminal device 102 or the tablet 101 in advance. Among them, a stroke in writing handwriting refers to a writing handwriting formed from the process of starting writing with a writing pen or a finger on the writing pad 101 to lifting the pen to suspend writing. That is to say, the writing of the same stroke in the writing stroke is continuous, and the generation time interval between multiple contacts in the same stroke is short. However, there is a certain time interval between the writing of different strokes in the writing handwriting, and the generation time interval between the contacts of different strokes is relatively long. The terminal device 102 or the tablet 101 can determine the generation time interval between different contacts according to the contact generation time in the contact data, and determine each stroke in the writing handwriting according to the generation time interval between different contacts. The touch points included in a stroke, that is, determining which touch points belong to the same stroke. Specifically, when the generation time interval between two adjacent contacts is less than or equal to a preset value, the terminal device 102 or the tablet 101 determines that the adjacent two contacts are contacts in the same stroke; When the generation time interval between the points is greater than the preset value, the terminal device 102 or the tablet 101 determines that the two adjacent contacts are contacts in two different strokes, that is, there are at least two strokes in the writing handwriting. The terminal device 102 or the tablet 101 then determines the writing order of each stroke in the writing handwriting according to the generation time of each contact in each stroke. In an implementation manner, the writing order may refer to a position where each stroke starts and ends and a sequence from the start to the end. In another embodiment, the writing order may refer to a writing order between each stroke in the writing handwriting.

Further, the terminal device 102 or the tablet 101 determines the stroke trajectory of each stroke in the writing stroke according to the coordinates and generation time of the touch point in each stroke; and then according to the stroke writing rule and the stroke of each stroke Track to determine the stroke type of each stroke in the writing handwriting. The stroke writing rule may be a stroke writing rule for Chinese characters. The stroke writing rules include: stroke horizontal (1), the stroke trajectory is increasing along the positive direction of the X axis, and the included angle formed by the stroke trajectory and the X axis is within plus or minus 10 degrees. The stroke is vertical (丨), the stroke trajectory is increasing along the negative direction of the Y axis, and the included angle formed by the stroke trajectory and the Y axis is within plus or minus 10 degrees. Stroke skimming (丿), the stroke trajectory is increasing along the negative direction of the X-axis, and increasing along the negative direction of the Y-axis, and the included angle formed by the stroke trajectory and the X-axis is within negative 125 degrees to negative 145 degrees. Stroke points (、), the stroke trajectory is increasing along the positive direction of the X axis, and increasing along the negative direction of the Y axis, and the angle formed by the stroke trajectory and the X axis is within the range of negative 35 degrees to negative 55 degrees. The distance of the end point coordinates is less than 90pixel. Stroke mention

The stroke trajectory is increasing along the positive direction of the X axis and the Y axis, and the included angle formed by the stroke trajectory and the X axis is within 35 degrees to 55 degrees. Stroke fold

The stroke trajectory increases in the positive direction of the X axis and then increases in the negative direction of the Y axis. The stroke hook (亅), the stroke trajectory is increased in the negative direction of the Y-axis and lifted to the upper left.

The terminal device 102 or the tablet 101 judges the change trend of the stroke trajectory of each stroke along the X-axis and Y-axis, respectively, and determines the angle between the stroke trajectory of each stroke and the X-axis and Y-axis, respectively; The change trend and the included angle are compared with the stroke writing rule to determine the stroke type of each stroke in the writing handwriting.

In one embodiment, the terminal device 102 or the tablet 101 determines strokes with incorrect writing order in the writing handwriting according to the stroke order rule and the writing order and stroke type of each of the writing handwriting. In one embodiment, the stroke order rule is the writing order of each stroke, and the incorrect writing order means that the order of starting and finishing of a certain stroke in the writing handwriting is incorrect. In another embodiment, the stroke order rule may also be a stroke order rule for Chinese characters pre-stored in a memory; the incorrect writing order means that the writing order between at least two strokes in the writing handwriting is incorrect . Please refer to Table 1 together, which shows the pre-stored rules for the writing order of Chinese character strokes, that is, the correct writing order between strokes when writing Chinese characters.

As shown in Table 1, the stroke order rules when writing Chinese characters include: horizontal first, vertical first, left first, then left, right from top to bottom, left to right, first outside then inside, first outside then inside, then sealing, first middle and then Wait on both sides. The terminal device 102 or the tablet 101 first determines the standard writing order of each stroke in the writing handwriting according to the stroke order rule and the stroke type of each stroke in the writing handwriting; then, each stroke in the writing handwriting The standard writing order of the strokes is compared with the actual writing order of each stroke to determine the strokes in which the writing order is incorrect in the writing handwriting.

Table 1. Chinese stroke order rules

For example, please refer to FIG. 3 together. FIG. 3 is a schematic diagram of a writing handwriting. The writing handwriting shown in Fig. 3 is "car". According to the stroke order rules of Chinese characters, the standard writing order of each stroke in the character "car" is horizontal, skimming, horizontal, and vertical. Assume that when the user writes the word "car", the actual writing order is horizontal, fold-off, vertical, and horizontal. Then, according to the standard writing order of each stroke in the word "car", the terminal device 102 or the tablet 101 can determine that in the actual writing handwriting corresponding to the word "car", the writing order of the last two strokes is not vertical correct. As another example, suppose that when the user writes the strokes in the "car" character horizontally, the order is from the right to the last stroke; and the standard writing order of the strokes is the order from the left to the right; then the terminal device 102 Or, according to the standard writing order of the horizontal strokes of the handwriting tablet 101, it can be determined that in the actual writing handwriting corresponding to the character "car", the writing order of the horizontal strokes is incorrect.

In an implementation manner, after the terminal device 102 or the tablet determines the first stroke in the writing order in which the writing order is incorrect according to the stroke order rule and the writing order and stroke type of each stroke in the writing handwriting, The strokes in which the writing order is arranged after the strokes are judged, and the strokes are directly determined as the strokes with incorrect writing order in the writing handwriting.

In an embodiment, the terminal device 102 or the tablet 101 may further determine the strokes in the writing handwriting according to the text formed by the writing handwriting, the writing rules of the text, and the writing order and stroke type of each stroke in the writing handwriting. Incorrect strokes. The writing rules of the text are used to indicate the standard writing order and correct stroke type of each stroke in the text corresponding to the writing handwriting. After determining the actual writing order and actual stroke type of each stroke in the writing handwriting, the terminal device 102 or the tablet 101 first detects whether the actual writing order between each stroke in the writing handwriting is correct. Specifically, the terminal device 102 or the tablet 101 determines a standard writing order between each stroke in the text corresponding to the writing handwriting according to the writing rule of the text, and then compares the standard writing order of the text with the writing handwriting. The actual writing order between each of the strokes is compared to check whether the writing order between each stroke in the writing handwriting is correct.

If the writing order between each stroke in the writing handwriting is correct, the terminal device 102 or the tablet 101 determines the correct stroke type of each stroke in the text corresponding to the writing handwriting according to the writing rules of the text; then The correct stroke type is compared with the type of each actual stroke of the writing handwriting to obtain a stroke with an incorrect stroke type in the writing handwriting. For example, suppose that when a user writes a "wooden" character, the actual writing order of each stroke and the actual stroke type are horizontal, vertical lifting, skimming, and 捺. According to the rules for writing Chinese characters, the standard writing order and correct stroke type of each stroke in "Mu" is horizontal, vertical, skimming, and 捺. Based on the correct stroke type of each stroke in the "wood" character, the terminal device 102 or the tablet 101 can determine that the actual stroke type of the second stroke in the actual writing handwriting corresponding to the "wood" character is incorrect.

If there are strokes in which the writing order between strokes is incorrect in the writing handwriting, the terminal device 102 or the tablet 101 first writes in the writing handwriting according to the standard writing order between each stroke in the text corresponding to the writing handwriting. The writing order of strokes with incorrect order is adjusted to obtain the writing handwriting after the stroke writing order is adjusted. Further, the terminal device 102 or the tablet 101 determines the correct stroke type of each stroke in the text corresponding to the writing handwriting according to the writing rules of the text; and corrects the stroke of each stroke in the text corresponding to the writing handwriting. The type is compared with the actual stroke type of the strokes corresponding to the writing order in the writing handwriting adjusted after the stroke writing order is adjusted, and the stroke with the incorrect stroke type in the writing handwriting after the stroke writing order adjustment is obtained, that is, in the actual writing handwriting Stroke type is incorrect. For example, suppose that when a user writes a "wood" character, the actual writing order of each stroke and the actual stroke type are horizontal, vertical lifting, 捺, and skimming. According to the rules for writing Chinese characters, the standard writing order and correct stroke type of each stroke in the "wood" characters are horizontal, vertical, skimming, and 捺. The terminal device 102 or the tablet 101 can determine the writing order of the third and fourth strokes in the actual writing handwriting corresponding to the "wood" character according to the standard writing order of each stroke in the "wood" character Incorrect; first adjust the writing order of the strokes with incorrect writing order to get the writing handwriting after adjusting the writing order of the strokes; the writing order and stroke type of each stroke in the writing handwriting after adjusting the writing order of the strokes For horizontal, vertical lifting, skimming, 捺. Further, according to the correct stroke type of each stroke in the "wood" character, the terminal device 102 or the tablet 101 can determine the second stroke in the writing handwriting after the stroke order corresponding to the "wood" character is adjusted. The stroke type of the vertical stroke is incorrect, that is, the stroke type of the vertical stroke of the second stroke in the actual writing handwriting is incorrect.

In one embodiment, the terminal device 102 or the tablet 101 acquires a font type corresponding to the writing handwriting. When the font type corresponding to the writing handwriting is a hard pen font, the terminal device 102 or the tablet 101 may further determine according to the pen tip rule, the contact pressure value in the contact data, and the stroke type of each stroke in the writing handwriting. In the writing handwriting, the stroke was written incorrectly. The stroke rule may be a stroke rule of a hard pen character in Chinese characters, that is, a sharp edge that a stroke should have when writing a hard pen character; the stroke rule is stored in the memory of the terminal device 102 or the tablet 101 in advance. Generally speaking, when writing Chinese characters, the rules of strokes include: heavy strokes and light strokes. For example: The stroke is horizontal with a stroke at the head and tail, that is, the pressure value of the contact at the head and tail should be larger, and the pressure of the contact at the middle portion should be smaller; the stroke is a stroke with a stroke at the head, that is, the head The pressure value of the contact should be large, and the pressure value of the contact should gradually decrease from beginning to end.

The terminal device 102 or the tablet 101 determines the actual contact pressure change of the contact included in each stroke according to the generation time and the contact pressure value of the contact included in each stroke; The stroke type of each stroke in the writing handwriting, and the change of the reference contact pressure value of the stroke type is obtained. The terminal device 102 or the tablet 101 then compares the change in the actual contact pressure value with the change in the reference contact pressure value to determine the incorrect strokes written by the pen in the writing handwriting. For example, the change of the reference contact pressure value of the stroke horizontally changes from large to small, and then from small to large. It is assumed that the actual contact pressure value of the strokes in the writing stroke changes only from large to small. Then the terminal device 102 or the tablet 101 can determine the actual contact pressure change of the stroke horizontal in the writing stroke, and the reference contact pressure value corresponding to the stroke horizontal does not match, and determine the stroke horizontal in the writing stroke as Strokes written incorrectly.

In an embodiment, the display interface of the tablet 101 or the terminal device 102 further includes a font option, and the font option includes a hard pen font option and a soft pen font option. Before the user writes text on the tablet 101, the tablet 101 or the terminal device 102 receives a selection instruction input by the user for the font option, and determines the type of font selected by the user according to the selection instruction. The selected font type is the font type corresponding to the handwriting when the user writes characters on the tablet 101. The terminal device 102 or the tablet 101 may obtain a font type corresponding to a writing handwriting according to a font type selected by a user.

Step S203, controlling the writing handwriting to be displayed on a display screen, and marking the incorrectly written strokes.

The strokes with incorrect writing include one or more of strokes with incorrect writing order, strokes with incorrect writing type, and strokes with incorrect stroke edge.

In the embodiment of the present invention, when the terminal device 102 needs to display the above writing handwriting, the terminal device 102 converts the touch point coordinates of each contact point in the writing handwriting into the screen coordinates of the terminal device 102. Then, the terminal device 102 determines the contact size of each contact in the writing handwriting according to the contact pressure value in the contact data. The contact size refers to the number of pixels occupied by the contact in a dot matrix formed on the display screen of the terminal device 102. Finally, the terminal device 102 displays the writing handwriting on the display screen of the terminal device 102 according to the screen coordinates, contact generation time, and contact size corresponding to each contact in the writing handwriting.

In one embodiment, the terminal device 102 or the writing board 101 determines a stroke width of each stroke according to a contact pressure value of a contact in each stroke in the writing handwriting. Among them, the stroke width = preset stroke width * contact pressure value / pressure constant. The terminal device 102 or the tablet 101 then displays the writing handwriting on its display screen according to the screen coordinates corresponding to each contact point in the writing handwriting, the contact generation time, and the stroke width of each stroke.

In one embodiment, when writing on the tablet 101 is faster with a stylus or a finger, the contacts in the writing handwriting collected by the tablet 101 become sparse. If the terminal device 102 or the tablet 101 displays the writing handwriting, only sparse contacts are connected by line segments, the curved strokes in the writing handwriting are prone to corners, which will cause the writing displayed on the terminal device 102 or the tablet 101 The handwriting is less reproducible than the actual writing handwriting. The terminal device 102 or the tablet 101 may use Bezier difference values to fit the touch points in the writing handwriting.

The terminal device 102 or the tablet 101 first determines the midpoint between each two contacts, then uses each contact as the control point, and uses the two midpoints adjacent to the contacts as the secondary Bezier difference, respectively. The starting and ending points and ending points of the value determine the quadratic Bezier curve between the contact and two midpoints adjacent to the contact to achieve fitting of the contact in the writing handwriting. The terminal device 102 or the tablet 101 acquires screen coordinates corresponding to the fitted touch points. Finally, the terminal device 102 or the handwriting tablet 101 enlarges the fitted writing handwriting to a target factor (for example, 1.2 times) on the display screen according to the screen coordinates corresponding to the fitted contacts, the generation time of the contacts, and the size of the contacts. Display. Fitting the contacts in this writing handwriting with Bezier difference can optimize radian for strokes with radian, which can simulate the real writing effect of writing handwriting and improve the writing handwriting displayed by terminal device 102 or tablet 101 The degree of reduction relative to the actual handwriting.

In the embodiment of the present invention, when the terminal device 102 or the tablet 101 displays the writing handwriting on its display screen, a specific mark may be used to display the incorrectly written stroke. For example, the incorrectly written stroke is displayed by a specific color mark. The terminal device 102 or the tablet 101 may mark the strokes in which the writing order is incorrect in the writing handwriting with a first marking symbol. The first marker symbol may be a first target color, and the first target color may be red, gray, or the like. In one embodiment, the terminal device 102 or the tablet 101 may display bold strokes with incorrect writing order in the writing handwriting, or may display the strokes with incorrect writing order in a blinking manner, which is not limited herein. For example, please refer to FIG. 3 together. Assuming that the writing order of the last two strokes (stroke vertical and stroke horizontal) in the word “car” in FIG. 3 is incorrect, the terminal device 102 or the tablet 101 may mark the The strokes in the wrong writing order are vertical and horizontal. The strokes in the correct writing order in the figure are marked in black. In the above manner, the writing order of the strokes in the writing handwriting can be detected, and the strokes with incorrect writing order can be marked and displayed.

The terminal device 102 or the tablet 101 may mark a stroke with an incorrect stroke type in the writing handwriting with a second marking symbol. The second marker symbol may be a second target color, and the second target color may be yellow or orange. In one embodiment, the terminal device 102 or the tablet 101 may also display bold strokes with incorrect stroke types in the writing handwriting, or flash display the strokes with incorrect stroke types, which is not limited herein. It should be noted that the second marker symbol is different from the first marker symbol, that is, the terminal device 102 or the tablet 101 displays the markers of the strokes whose type is incorrect, and the markers of the strokes whose writing order is incorrect. The display is different. By adopting the above manner, the type of strokes in writing handwriting can be detected, and strokes with incorrect stroke types can be marked and displayed.

Wherein, the terminal device 102 or the tablet 101 may mark a stroke that is incorrectly written by a pen in the writing handwriting with a third marking symbol. The third mark symbol may be a third target color, and the third target color may be purple or blue. In an embodiment, the terminal device 102 or the tablet 101 may also display bold strokes in which the writing edge is incorrectly written in the writing handwriting, or may display blinking strokes in which the writing edge is incorrectly written, which is not limited herein. It should be noted that the third mark symbol is different from the first mark symbol and the second mark symbol, that is, the terminal device 102 or the tablet 101 displays the marks of the strokes that are incorrectly written by the pen, and the writing order of the strokes. Marks for incorrect strokes are displayed differently, as are marks for strokes that are incorrect for the stroke type. By adopting the above manner, the stroke of the stroke in the writing handwriting can be detected, and the incorrect stroke written by the stroke can be marked and displayed.

In an embodiment, the terminal device 102 or the tablet 101 further adjusts the writing order of the strokes in which the writing order is incorrect in the writing handwriting according to the stroke order rule and the stroke type of each stroke in the writing handwriting to obtain The standard writing order for each stroke in the writing handwriting. The terminal device 102 or the tablet 101 replaces the strokes of the incorrect stroke type in the writing handwriting according to the correct stroke type of each stroke in the text corresponding to the writing handwriting indicated by the writing rule, and the stroke types are correct. Writing handwriting. The terminal device 102 or the tablet 101 obtains the contact reference pressure value corresponding to the incorrect stroke of the pen writing in the writing handwriting, and the contact reference pressure value is obtained according to the rules of the writing point. The standard pressure value of each contact is related to the position of the contact in the stroke. The contact reference pressure value may be stored in the memory of the terminal device 102 or the tablet 101. The contact reference pressure value can be a specific value or a range of values. The terminal device 102 or the tablet 101 then determines the correction pressure value of each contact according to the contact coordinates and contact generation time of each contact in the incorrect writing stroke of the pen, and the reference pressure value of the contact; The correction pressure value of each contact point is used to correct the stroke of an incorrectly written stroke of the pen to obtain a correct stroke of the stroke.

Further, the terminal device 102 or the tablet 101 is based on the screen coordinates of the contacts in the writing handwriting, the contact generation time, each correct stroke in the writing handwriting, and the correct writing order of each stroke, and the tip of each stroke. , The standard writing process of each stroke in the writing handwriting is displayed on its display screen. The standard writing process includes standard writing order, correct stroke type, and correct stroke.

In the above manner, the writing order of the strokes in the writing handwriting can be detected when writing the text, the strokes whose writing order does not satisfy the rules of the stroke order can be detected, and the strokes with the wrong writing order can be marked to show the user to follow the correct text Writing rules, develop good writing habits. It is also possible to perform error detection on strokes with incorrect stroke types when writing text, and mark and display strokes with incorrect stroke types to prompt the user that the stroke types are incorrect. It is also possible to perform error detection on strokes that do not satisfy the rule of the pen tip when writing the text, and mark the strokes that do not satisfy the rule of the pen tip to indicate to the user that the stroke of the pen is incorrect. The standard writing process of each stroke in the writing handwriting can also be simulated and reproduced to remind the user of the correct writing process of the writing handwriting, thereby correcting the wrong stroke when writing the text and improving the user's calligraphy level. Writing text correctly can improve the user's writing efficiency.

In one embodiment, during the process of writing text on the tablet 101 by a user using a writing pen or a finger. After the tablet 101 collects the contact data of the current writing handwriting, it displays the current writing handwriting in real time, and sends the contact data of the current writing handwriting to the terminal device 102. After receiving the touch point data of the current writing handwriting, the terminal device 102 displays the current writing handwriting on its screen. In the above manner, the terminal device 102 and the tablet 101 can realize synchronous display of the current writing handwriting.

In one embodiment, during the process of writing text on the tablet 101 by a user using a writing pen or a finger. After the touchpad 101 collects the touch data of the current writing handwriting, the current writing handwriting is displayed in real time, and when it is detected that the user pauses writing for a period longer than a preset time threshold (for example, 2s), the current acquired writing handwriting is detected. All contact data is sent to the terminal device 102 together. After receiving all the touch point data of the writing handwriting, the terminal device 102 displays the writing handwriting on its screen. In the above manner, the tablet 101 can synchronously display the current writing handwriting, and the terminal device 102 displays the writing handwriting after the writing handwriting is completed.

Please refer to FIG. 4, which is a schematic diagram of a hardware structure of a terminal device according to an embodiment of the present invention. The terminal device described in the embodiment of the present invention includes a communication unit 401, a display screen 402, a processor unit 403, and a memory 404. The communication unit 401, the display screen 402, the processor unit 403, and the memory 404 may be connected through a bus, or may be connected in other ways. The terminal device may be a tablet 101 or a device 102.

The processor unit 403 may be one of a Central Processing Unit (CPU), a Microcontroller Unit (MCU), or a Graphics Processing Unit (GPU). The processing unit 403 may also be a core used in a multi-core CPU, a multi-core GPU, or a multi-core MCU for implementing communication identification binding.

The above-mentioned communication unit 401 may be used for receiving and transmitting information or signaling, and receiving and transmitting signals. The communication unit 401 may be a transceiver. The display screen 402 may be used to display information input by the user or provided to the user and various menus of the control device, and the display screen 402 may also be used to display the writing track. The display screen 402 may be configured by using an LCD (Liquid Crystal Display) or an OLED (Organic Light-Emitting Diode).

The above memory 404 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system and a storage program (such as a text storage function, a location storage function, etc.) required by at least one function; the storage data area may store data according to The data (such as image data and text data) created by the use of the terminal device may include a user interface module, an application storage program, and the like.

The memory 404 is further configured to store program instructions, and the processor unit 403 may call the program instructions stored in the memory 404 to implement a method for detecting writing errors as shown in FIG. 2.

The present invention also provides a computer-readable storage medium, where the computer-readable storage medium stores text writing error detection instructions, and when the text writing error detection instructions are run on a computer, the computer is caused to execute the above method embodiment. The method of text writing error detection is described.

It should be noted that, for the foregoing method embodiments, for the sake of simple description, they are all described as a series of action combinations. However, those skilled in the art should know that the present invention is not limited by the described action sequence. Because according to the present invention, some steps may be performed in another order or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

The steps in the method of the embodiment of the present invention may be adjusted, combined, and deleted according to actual needs. The functional units in the device according to the embodiment of the present invention may be combined, divided, and deleted according to actual needs.

A person of ordinary skill in the art may understand that all or part of the steps in the various methods of the foregoing embodiments may be implemented by a program instructing related hardware. The program may be stored in a computer-readable storage medium. The storage medium may include: Flash disk, Read-Only Memory (ROM), Random Access Memory (RAM), magnetic disk or optical disk, etc.

What has been disclosed above is only a preferred embodiment of the present invention, and of course, the scope of rights of the present invention cannot be limited by this. Those of ordinary skill in the art can understand all or part of the process of implementing the above embodiments and follow the rights of the present invention Equivalent changes required are still within the scope of the invention.

Claims

A text writing error detection method, characterized in that the method includes:

Acquiring touch point data of a handwriting when a user writes a text when writing on a writing board, the touch point data includes one or more of touch point coordinates, touch point generation time, and touch pressure value;

Determining incorrectly written strokes in the writing handwriting according to the writing rules of the text and the touch point data;

The control displays the writing handwriting on a display screen and marks the incorrectly written stroke.
The method according to claim 1, wherein the touch point data includes touch point coordinates and touch point generation time, the text writing rule includes a stroke order rule, the text writing rule and the touch point data To determine that an incorrectly written stroke in the writing handwriting includes:

Determining a writing order of each stroke in the writing handwriting according to the contact generation time;

Determining a stroke type of each stroke according to the touch point coordinates and the touch point generation time;

Determining, according to the stroke order rule and the determined writing order and stroke type of each stroke, a stroke in which the writing order is incorrect in the writing handwriting;

And controlling the writing handwriting to be displayed on a display screen, and marking the strokes in which the writing order is incorrect with a first marking symbol.
The method according to claim 2, further comprising:

Adjusting the writing order of the strokes with incorrect writing order according to the stroke order rule and the stroke type of each stroke; and

Controls the standard writing order for displaying each stroke in the writing handwriting on the display screen.
The method according to claim 2, wherein the determining, according to the writing rules of the text and the touch point data, an incorrectly written stroke in the writing handwriting comprises:

Determining, according to the writing rules of the text and the determined writing order and stroke type of each stroke, a stroke with an incorrect stroke type in the writing stroke;

The control displays the writing handwriting on the display screen, and marks the stroke with an incorrect stroke type with a second marking symbol.
The method according to claim 1, wherein the contact data includes contact coordinates, contact generation time, and contact pressure values, the text writing rule includes a stylus rule for hard pen characters, and the writing according to text Rules and the touch point data to determine incorrectly written strokes in the writing handwriting include:

Obtaining a font type corresponding to the writing handwriting;

When the type of the font corresponding to the writing handwriting is a hard pen font, determining a stroke type of each stroke in the writing handwriting according to the touch point coordinates and the touch point generation time;

Determining, according to the stroke rule, the contact pressure value, and the determined stroke type of each stroke, an incorrect stroke written by the stroke in the writing handwriting;

And controlling the writing handwriting to be displayed on the display screen, and marking the stroke that is incorrectly written by the pen tip with a third marking symbol.
The method according to claim 5, further comprising:

Obtaining a contact reference pressure value corresponding to the stroke with which the pen is writing incorrectly, and correcting the stroke of the stroke with which the pen is writing incorrectly according to the contact reference pressure value; and

A standard stroke of each hard stroke in the writing handwriting is displayed on the display screen.
The method according to claim 1, wherein the contact data includes contact coordinates, contact generation time, and contact pressure value, the display screen is a display screen on a terminal device, and the on-screen display The writing handwriting displayed on the screen includes:

Converting the touch point coordinates into screen coordinates of the terminal device, and determining a touch point size according to the touch point pressure value;

And controlling the display of the writing handwriting on the display screen according to the screen coordinates, the contact generation time, and the contact size.
The method according to claim 1, wherein the display screen is a display screen on a tablet.
A terminal device includes: a processor unit and a display screen, where the processor unit is configured to:

Acquiring touch point data of a handwriting when a user writes a text when writing on a writing board, the touch point data includes one or more of touch point coordinates, touch point generation time, and touch pressure value;

Determining incorrectly written strokes in the writing handwriting according to the writing rules of the text and the touch point data;

And controlling the display of the writing handwriting on the display screen and marking the incorrectly written stroke.
The terminal device according to claim 9, wherein the contact data includes contact coordinates and contact generation time, the text writing rule includes a stroke order rule, and the processor unit generates according to the contact Time to determine the writing order of each stroke in the writing handwriting;

Determining a stroke type of each stroke according to the touch point coordinates and the touch point generation time;

Determining, according to the stroke order rule and the determined writing order and stroke type of each stroke, a stroke in which the writing order is incorrect in the writing handwriting;

Controlling the writing handwriting to be displayed on the display screen, and marking the strokes in which the writing order is incorrect with a first marking symbol.
The terminal device according to claim 10, wherein the processor unit further adjusts the writing order of the strokes in which the writing order is incorrect according to the stroke order rule and the stroke type of each stroke. ;as well as

And controlling a standard writing order of each stroke in the writing handwriting to be displayed on the display screen.
The terminal device according to claim 10, wherein the processor unit determines that the stroke type in the writing handwriting is incorrect according to the writing rule of the text and the determined writing order and stroke type of each stroke. Strokes

And controlling the writing handwriting to be displayed on the display screen, and marking the stroke with an incorrect stroke type with a second marking symbol.
The terminal device according to claim 9, wherein the contact data includes contact coordinates, contact generation time, and contact pressure value, the text writing rule includes a stylus rule for hard pen characters, and the processor The unit obtains a font type corresponding to the writing handwriting;

When the type of the font corresponding to the writing handwriting is a hard pen font, determining a stroke type of each stroke in the writing handwriting according to the touch point coordinates and the touch point generation time;

Determining, according to the stroke rule, the contact pressure value, and the determined stroke type of each stroke, an incorrect stroke written by the stroke in the writing handwriting;

Control the display of the writing handwriting on the display screen, and mark the stroke that is incorrectly written by the pen tip with a third marking symbol.
The terminal device according to claim 13, wherein the processor unit further acquires a contact reference pressure value corresponding to a stroke that is incorrectly written by the pen, and writes the pen edge according to the contact reference pressure value Correction of incorrect strokes; and

Controlling the display of a standard stroke of each hard stroke in the writing handwriting on the display screen.
The terminal device according to claim 9, wherein the contact data includes contact coordinates, contact generation time, and contact pressure values, and the processor unit is specifically configured to:

Converting the coordinates of the touch point into screen coordinates of a terminal device, and determining the size of the touch point according to the pressure value of the touch point;

And controlling the display of the writing handwriting on the display screen according to the screen coordinates, the contact generation time, and the contact size.
A storage medium, wherein the storage medium stores a text writing error detection instruction, and when the text writing error detection instruction is run on a computer, the computer causes the computer to execute the device according to any one of claims 1 to 8. The method of text writing error detection is described.