WO2019037348A1

WO2019037348A1 - Circular selection method and device for handwritten chinese characters, touch apparatus, and readable storage medium

Info

Publication number: WO2019037348A1
Application number: PCT/CN2017/116310
Authority: WO
Inventors: 向淘
Original assignee: 广州视源电子科技股份有限公司; 广州视臻信息科技有限公司
Priority date: 2017-08-21
Filing date: 2017-12-15
Publication date: 2019-02-28
Also published as: CN107632760B; CN107632760A

Abstract

A circular selection method and device for handwritten Chinese characters, a touch apparatus, and a readable storage medium. The circular selection method for handwritten Chinese characters comprises: monitoring a circular selection operation performed on target handwriting on a display interface (S21); connecting touch points detected during the circular selection operation, and generating an enclosed motion trajectory corresponding to the circular selection operation (S22); determining, according to a point of intersection between a straight line corresponding to each handwriting point of the target handwriting and the enclosed motion trajectory and a trajectory angle corresponding to each of the points of intersection therebetween, whether each handwriting point is located within the enclosed motion trajectory, wherein the straight line corresponding to each handwriting point is a straight line passing through the handwriting points (S23); determining, according to the calculated number of handwriting points located within the enclosed motion trajectory, whether the target handwriting is located within the enclosed motion trajectory (S24); if it is determined that the target handwriting is located within the enclosed motion trajectory, encircling and selecting the target handwriting (S25). The method reduces user difficulty in selecting a handwritten Chinese character on a screen, thereby improving user experience.

Description

Writing stroke circle selection method and device, touch device, readable storage medium

Technical field

The present invention relates to the field of computer technologies, and in particular, to a method and device for writing a handwriting circle, a touch device, and a readable storage medium.

Background technique

In the prior art, when the user circles the writing handwriting in the touch screen device (eg, the electronic whiteboard), after obtaining the user's circled trajectory, it is determined whether the user selects the user by the following steps 1) to 7) Writing handwriting:

1) connecting the start point and the end point of the circle selection track to obtain a closed circle selection track;

2) making a straight line passing through a certain writing point in the writing handwriting to obtain an intersection between the straight line and the closed circled trajectory;

3) determining whether the number of intersections distributed on the left or right side of the above-mentioned handwriting point in the above-mentioned straight line is an odd number, and if so, jumps to 4), and if not, jumps to 5);

4) determining that the handwriting point is inside the closed circled track and jumping to 6);

5) determining that the handwriting point is outside the closed circled track;

6) Looping the above steps 2) to 5), and performing the above judgment on all the handwriting points in the written handwriting;

7) judging whether all the handwriting points in the writing handwriting are inside the closed circled track, and if so, determining that the writing handwriting is inside the closed circled track, and selecting the writing handwriting, if not, then It is determined that the writing handwriting is outside the closed circled track, and the writing handwriting is not selected.

By performing the above steps 1) to 7), it is possible to obtain the result of the user's circled writing stroke, but the prior art is not applicable to all the circled situations, as shown in FIG. 1, which is an inapplicable circle. A schematic diagram of the selection situation. In Fig. 1, the writing stroke is located inside the circled track, and the user has theoretically selected the writing hand, but if judged according to the above steps 1) to 7), the opposite result is obtained. It can be seen that due to the vulnerability of the judgment logic in the prior art, the user may appear Ming has already circled the writing handwriting, but still can not select the phenomenon of writing handwriting, so that the user has difficulty in selecting the writing handwriting, which is easy to bring a bad user experience.

Summary of the invention

The embodiment of the invention provides a method and a device for selecting a writing stroke circle, a touch device and a readable storage medium, which can reduce the difficulty of the user to select a writing handwriting in the screen and improve the user experience.

A method for selecting a writing stroke circle according to an embodiment of the present invention specifically includes: at an electronic device having a touch-sensitive surface:

Monitoring the circle selection operation of the target handwriting on the display interface;

Connecting the touch points detected during the circle selection operation to generate a closed movement trajectory corresponding to the circle selection operation;

Determining whether each of the handwriting points is located in the closed according to an intersection of a straight line corresponding to each of the handwriting points of the target handwriting and the closed moving track and a track angle of the closed moving track at each of the intersection points Moving the inside of the trajectory; wherein the straight line corresponding to the handwriting point is a straight line passing through the handwriting point;

Determining whether the target handwriting is located inside the closed moving track according to the calculated number of the handwriting points located inside the closed moving track;

When it is determined that the target handwriting is located inside the closed movement track, the target handwriting is circled.

Further, the touch points that are detected during the circle selection operation are connected to generate a closed movement track corresponding to the circle selection operation, which specifically includes:

Obtaining a position of a touch point on the touch-sensitive surface every predetermined time during the circle selection operation;

And sequentially connecting the acquired touch points on the touch-sensitive surface to generate corresponding vector line segments;

When the end of the circle selection operation is detected, the start point and the end point of the circle selection operation are connected, and the closed movement track is generated according to all of the vector line segments.

Further, the trajectory angle is an angle between a direction of the corresponding vector line segment where the intersection point corresponds and a reference direction of the touch-sensitive surface.

Further, determining, according to an intersection of a straight line corresponding to each of the handwriting points of the target handwriting and the closed moving track, and a track angle of the closed moving track at each of the intersection points, determining each of the handwriting points Whether it is located inside the closed moving track, for each of the straight lines, specifically includes:

Determining whether the number of the intersection points on both sides of the handwriting point in the straight line are even numbers;

If not, determining that the handwriting point is located inside the closed movement track;

If yes, determining whether a difference in the trajectory angle between the trajectory angles corresponding to each of the intersection points of the same side of the handwriting point in the straight line is less than a preset threshold;

Determining that the handwriting point is located in the closed moving track if, for each side of the handwriting point in the straight line, the two intersection points having the track angle difference value being less than the preset threshold value internal;

Determining that the handwriting point is located in the closed if, for any side of the handwriting point in the straight line, the track angle difference between each two of the intersection points is not less than the preset threshold value Move the outside of the track.

Further, the preset threshold is 90 degrees.

Correspondingly, the embodiment of the present invention further provides a writing stroke circle selection device, which specifically includes:

The circle selection operation monitoring module is configured to monitor the circle selection operation of the target handwriting located on the display interface;

a closed movement trajectory generating module, configured to connect the touch points detected during the circle selection operation to generate a closed movement trajectory corresponding to the circle selection operation;

a handwriting point circle selection judging module, configured to determine, according to an intersection of a straight line corresponding to each handwriting point of the target handwriting and the closed moving track, and a track angle of the closed moving track at each of the intersection points Whether the handwriting point is located inside the closed moving track; wherein the straight line corresponding to the handwriting point is a straight line passing through the handwriting point;

a target handwriting circle selection determining module, configured to determine, according to the calculated number of the handwriting points located inside the closed moving track, whether the target handwriting is located inside the closed moving track;

a target handwriting circle selection module, configured to determine that the target handwriting is located within the closed movement track In the case of the Ministry, the target handwriting is circled.

Further, the closed movement trajectory generating module specifically includes:

a touch point location acquiring unit, configured to acquire a position of a touch point on the touch-sensitive surface every predetermined time during the circle selection operation;

a vector line segment generating unit, configured to sequentially connect the acquired touch points on the touch-sensitive surface to generate corresponding vector line segments; and

a closed movement trajectory obtaining unit, configured to connect a starting point and a ending point of the arranging operation when detecting the end of the circling operation, and generate the closed moving trajectory according to all the vector line segments; The trajectory angle is an angle between a direction of the corresponding vector line segment where the intersection point corresponds and a reference direction of the touch-sensitive surface.

Further, the handwriting point circle selection judgment module specifically includes:

a intersection number judging unit, configured to determine whether the number of the intersection points on both sides of the handwriting point in the straight line are even numbers;

a first track circle selection result determining unit, configured to determine that the handwriting point is located inside the closed moving track when the number of the intersection points on any side of the handwriting point in the straight line is an odd number ;or,

a trajectory angle difference value determining unit, configured to determine, when the number of the intersection points on both sides of the handwriting point in the straight line are even numbers, determining that the straight line is located on the same side of the handwriting point Whether the difference in the trajectory angle between the trajectory angles corresponding to each of the two intersection points is less than a preset threshold; and

a second hand point circle selection result determining unit, configured to, when, for each side of the handwriting point in the straight line, the two intersection points having the track angle difference value smaller than the preset threshold value, Determining that the handwriting point is located inside the closed moving track; or

a third hand point circle selection result determining unit, configured to: when for any side of the handwriting point in the straight line, the track angle difference value between each two of the intersection points is not less than the preset At the threshold, it is determined that the handwriting point is outside the closed moving track.

An embodiment of the present invention further provides a touch device, specifically including at least one memory and at least one processor;

The memory includes at least one executable program stored therein;

The executable program, when executed by the processor, causes the processor to implement the above-described writing stroke selection method.

The embodiment of the invention further provides a computer readable storage medium, in particular comprising a stored computer program, wherein the device in which the computer readable storage medium is controlled to execute the writing stroke selection method as described above when the computer program is running .

Embodiments of the present invention have the following beneficial effects:

The writing stroke circle selection method and device, the touch device and the readable storage medium provided by the embodiment of the invention pass the line passing through the handwriting point to the handwriting point, and the number of intersections between the line and the user's circled track according to the line While determining whether the handwriting point is located inside the circled trajectory, according to the trajectory angle of the circled trajectory at each intersection point, whether the handwriting point is located inside the circled trajectory is further verified and judged, that is, According to the double standard, it is judged whether the handwriting point is located inside the circled track, and then it is determined whether the target handwriting of the handwriting point is located inside the circled track, thereby being able to make up for the logic loophole of the traditional handwriting circle selection method and improving the judgment of the handwriting. Whether the target handwriting composed of the points is within the circled track accuracy, reduces the difficulty of the user's selected handwriting on the screen, and improves the user experience.

DRAWINGS

1 is a schematic diagram of an unsuitable circle selection situation of a conventional handwriting circle selection method;

2 is a schematic flow chart of a preferred embodiment of a writing stroke selection method provided by the present invention;

3 is a schematic diagram of generating a vector line segment of a circle selection operation process in a preferred embodiment of the writing stroke selection method provided by the present invention;

4 is a schematic diagram of a closed movement trajectory in a preferred embodiment of the writing stroke selection method provided by the present invention;

FIG. 5 is a schematic diagram showing a line intersecting a closed moving track by a handwriting point in another preferred embodiment of the writing handwriting circle selection method provided by the present invention; FIG.

6 is a schematic structural view of a preferred embodiment of a writing stroke sorting device provided by the present invention;

FIG. 7 is a schematic structural diagram of a preferred embodiment of a touch device provided by the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The present invention determines the handwriting by making a straight line through the handwriting point and according to the number of intersections between the straight line and the closed moving track generated by the user's circled operation and the track angle of the closed moving track at each intersection. Whether the point is inside the closed movement track, and further determining whether the target handwriting composed of the handwriting point is inside the closed movement track, thereby determining whether the user's selection operation is selected by the circle selection operation. In the present invention, it is determined whether or not the handwriting point corresponding to the straight line is selected according to the double standard of the number of intersections between the moving trajectory of the straight line and the circle selection operation and the angle of the moving trajectory at the position of the intersection point, thereby determining whether the corresponding correspondence is selected. The target handwriting can therefore make up for the logic loopholes of the traditional handwriting circle selection method, reduce the difficulty of the user to select the writing handwriting in the screen, and improve the user experience.

As shown in FIG. 2, a schematic flowchart of a preferred embodiment of a writing stroke selection method provided by the present invention includes steps S21 to S25, as follows: at an electronic device having a touch-sensitive surface:

S21: monitoring the circle selection operation of the target handwriting located on the display interface;

S22: Connect the touch points detected during the circle selection operation to generate a closed movement track corresponding to the circle selection operation;

S23: according to a straight line corresponding to each handwriting point of the target handwriting and the closed moving track An intersection point and a trajectory angle of the closed movement trajectory at each of the intersection points, determining whether each of the handwriting points is located inside the closed movement trajectory; wherein the straight line corresponding to the handwriting point passes the handwriting a straight line of points;

S24: determining, according to the calculated number of the handwriting points located inside the closed moving track, whether the target handwriting is located inside the closed moving track;

S25: When the target handwriting is determined to be located inside the closed movement track, the target handwriting is circled.

It should be noted that embodiments of the present invention are performed by an electronic device having a touch-sensitive surface, such as a smart phone having a touch surface, a smart tablet, or the like. The touch sensitive surface may be a capacitive screen, a resistive screen, an infrared screen or the like for receiving a touch operation of a user. The electronic device can also have a display interface for displaying related user interaction information.

When the user needs to circle a certain target handwriting located in the display interface, a corresponding circle selection operation is performed on the touch-sensitive surface. The electronic device monitors the circle selection operation on the touch-sensitive surface, and acquires the position information of the current location of the touch point at intervals, and the current location of the touched point that is currently monitored is the last time that the touched point is monitored. The location where the touch point is located is connected. When the end of the circle selection operation is detected (ie, the lifting operation), the start point and the end point of the circle selection operation are connected, thereby generating a corresponding closed movement track. Then, for each of the handwriting points in the target handwriting, a straight line passing through the handwriting points is generated, and an intersection between the straight lines and the closed moving track and a track angle corresponding to each intersection point are obtained. Wherein, the trajectory angle is an angle between a trajectory direction of the closed moving trajectory at each intersection and a reference direction of the touch sensitive surface. It can be understood that each touch-sensitive surface has a corresponding built-in coordinate system. In this embodiment, the reference direction of the touch-sensitive surface may be the positive direction of the abscissa axis of the built-in coordinate system, or may be the vertical axis. The direction can also be other preset coordinate directions, and the specific settings can be set according to the needs of the actual application scenario. After obtaining the intersection between the straight line passing the handwriting point and the closed moving track and the trajectory angle corresponding to each intersection point, determining whether the handwriting point is in the closed movement according to the number of the intersection points and the trajectory angle corresponding to each intersection point Inside the track.

In the embodiment of the present invention, determining whether the target handwriting is located inside the closed moving track is The next judgment method:

1. After determining a handwriting point located inside the closed moving track, immediately determining that the target handwriting is located inside the closed moving track;

After determining that the predetermined number of handwriting points located inside the closed moving track, determining that the target handwriting is located inside the closed moving track;

3. After all the handwriting points in the target handwriting are judged according to the above steps, whether or not the handwriting points are located inside the closed moving track, the number of handwriting points located inside the closed moving track is counted, and it is determined that the target handwriting is located in the closed Whether the ratio of the number of handwriting points inside the moving track to the number of all the handwriting points in the target handwriting is greater than a preset threshold, and if so, determining that the target handwriting is inside the closed moving track, and selecting the target handwriting, If not, it is determined that the target handwriting is outside the closed moving track, and the target handwriting is not processed. In some specific embodiments, the unselected result prompt may also be outputted on the display interface at the same time.

In the embodiment of the present invention, a line passing through the handwriting point is made to the handwriting point, and the handwriting point is judged to be inside the circled track according to the number of intersections of the line and the user's circled track, according to The trajectory angle of the circled trajectory at each intersection point is further verified by whether the handwriting point is located inside the circled trajectory, that is, by determining whether the handwriting point is located inside the circled trajectory according to the double standard, thereby determining the Whether the target handwriting where the handwriting point is located is located inside the circled track, thereby making up for the logic loophole of the traditional handwriting circle selection method, improving the accuracy of determining whether the target handwriting composed of the handwriting point is inside the circled track, and reducing The user selects the difficulty of writing strokes on the screen to improve the user experience.

More preferably, the touch points that are detected during the circle selection operation are connected to generate a closed movement track corresponding to the circle selection operation, which specifically includes:

When the end of the circle selection operation is detected, the start point and the end point of the circle selection operation are connected, and The closed movement trajectory is generated from all of the vector line segments.

It should be noted that, when the user selects the circle selection operation of the touch-sensitive surface, the electronic device acquires the position information of the touch point on the touch-sensitive surface every predetermined time period, and the touch point detected this time. The position is connected with the position of the touch point detected last time, thereby obtaining a vector line segment including direction information, wherein the position of the touch point detected by the vector line segment is the starting point, and the touch detected this time The location of the point is the end point. As shown in FIG. 3, it is a schematic diagram for generating a vector line segment of the circle selection operation process. The touch point of the electronic device on the touch-sensitive surface disappears, that is, when the user's circle-finding operation is detected, the end point of the circle-selection operation is the vector start point, and the start point of the circle-selection operation is the vector end point. The termination point and the starting point of the circle selection operation are connected, thereby obtaining corresponding vector line segments, thereby obtaining a closed movement track composed of all the above-mentioned vector line segments. As shown in FIG. 4, it is a schematic diagram of a closed moving track.

After obtaining the closed movement trajectory, the electronic device makes a straight line passing through the handwriting point for each of the target handwritings in the display interface, and obtains an intersection between the straight line and the closed moving trajectory and corresponding to the intersection point. The trajectory angle. Wherein, the trajectory angle is an angle between a direction of the vector line segment where the corresponding intersection point is located and a reference direction of the touch-sensitive surface. In some more preferred embodiments, the line is a line that passes through the corresponding handwriting point and is parallel to the abscissa axis of the built-in coordinate system of the touch-sensitive surface. Then, the electronic device can determine whether the target handwriting is inside the closed movement track according to the obtained number of intersection points and the trajectory angle corresponding to each intersection point, thereby determining whether the user's circle selection operation selects the target handwriting.

In another more preferred embodiment, based on the above embodiment, the intersection of the straight line corresponding to each of the handwriting points of the target handwriting and the closed moving track and the closed moving track are each The trajectory angle at the intersection point is determined whether each of the handwriting points is located inside the closed moving track, and for each of the straight lines, specifically:

More preferably, the preset threshold is 90 degrees.

It should be noted that after obtaining the closed movement trajectory formed according to the user's circle operation and one or more straight lines passing through the respective handwriting points in the target handwriting, the following steps S1 to S9 are performed to determine whether the target handwriting is located. Close the inside of the movement track:

S1: obtaining a handwriting point in the target handwriting and a straight line corresponding to the handwriting point;

S2: obtaining an intersection of the straight line and the closed movement track, and determining whether the number of intersection points on the two sides of the handwriting point in the straight line are even numbers, if yes, jumping to S3, if not, jumping to S4;

S3: calculating a trajectory angle difference between a trajectory angle corresponding to each intersection point of the intersection points and a trajectory angle corresponding to each of the intersection points of the intersection points, and determining whether each side of the handwriting point in the line is uniform There are two intersection points whose track angle difference is less than the preset threshold, if yes, then jump to S4, if not, then jump to S5;

S4: determining that the handwriting point is located inside the closed moving track, and jumping to S6;

S5: determining that the handwriting point is located outside the closed moving track;

S6: determining whether the target stroke has the next undetermined handwriting point, and if so, acquiring the next handwriting point and the line corresponding to the next handwriting point, and jumping to S2, if not, jumping To S7;

S7: counting the number of handwriting points in the target handwriting that are located inside the closed moving track, and determining the number of handwriting points in the target handwriting that are inside the closed moving track and the target handwriting Whether the ratio of the number of all the handwriting points in the middle is greater than a preset threshold, if yes, then jump to S8, if not, then jump to S9;

S8: Determine that the target handwriting is located inside the closed moving track, and select the target handwriting.

S9: determining that the target handwriting is outside the closed moving track, not selecting the target handwriting, and outputting an unselected result prompt to the display interface.

In some more preferred embodiments, the predetermined threshold is 90 degrees.

For example, as shown in FIG. 5, a schematic diagram of a line 1 passing through a handwriting point A intersecting a closed moving track. The intersections of the straight line 1 and the closed moving track are a, b, c, and d, respectively. When it is judged whether or not the handwriting point A is located inside the closed moving track, it is first determined whether the number of intersections of the straight line 1 located on both sides of the handwriting point A is even. As can be seen from the figure, the number of intersections on the left and right sides of the handwriting point A in the straight line 1 is two, so it is further determined whether the difference between the trajectory angles corresponding to the intersection points is less than 90 degrees. Specifically, for the left side of the handwriting point A, the trajectory angle difference between the intersection point a and the intersection point b is calculated, and it is determined whether the trajectory angle difference is less than 90 degrees; for the right side of the handwriting point A, the intersection point c and the intersection point are calculated The difference in the trajectory angle between d, and determine whether the trajectory angle difference is less than 90 degrees. If the difference in the trajectory angle between the intersection point a and the intersection point b and the trajectory angle difference between the intersection point c and the intersection point d are both less than 90 degrees, it is determined that the handwriting point A is located inside the closed movement trajectory, otherwise, the handwriting is determined. Point A is located outside of the closed moving track.

The writing stroke circle selection method provided by the embodiment of the invention passes the straight line passing through the handwriting point to the handwriting point, and whether the handwriting point is located in the circled trajectory according to the number of intersections of the straight line and the user's circled trajectory While internally judging, according to the trajectory angle of the circled trajectory at each intersection, whether the handwriting point is located inside the circled trajectory is further verified, that is, whether the handwriting point is located in the circle according to the double standard Selecting the inside of the track to determine whether the target handwriting of the handwriting point is located inside the circled track, thereby making up for the logic loophole of the traditional handwriting circle selection method, and improving whether the target handwriting composed of the handwriting point is in the circle Selecting the internal accuracy of the track reduces the difficulty of the user's choice of writing strokes on the screen and improves the user experience.

Correspondingly, the present invention also provides a writing stroke circle selecting device, which can implement the above embodiments. Write all the flow of the stroke selection method.

FIG. 6 is a schematic structural diagram of a preferred embodiment of a writing stroke sorting device provided by the present invention, as follows:

The circle selection operation monitoring module 61 is configured to monitor the circle selection operation of the target handwriting located on the display interface;

a closed movement trajectory generating module 62, configured to connect the touch points detected during the circle selection operation to generate a closed movement trajectory corresponding to the circle selection operation;

a handwriting point circle selection judging module 63, configured to determine, according to an intersection of a straight line corresponding to each handwriting point of the target handwriting and the closed moving track, and a track angle of the closed moving track at each of the intersection points Whether each of the handwriting points is located inside the closed moving track; wherein the straight line corresponding to the handwriting point is a straight line passing through the handwriting point;

a target handwriting circle selection determining module 64, configured to determine, according to the calculated number of the handwriting points located inside the closed moving track, whether the target handwriting is located inside the closed moving track;

The target handwriting circle selection module 65 is configured to circle the target handwriting when it is determined that the target handwriting is located inside the closed movement track.

More preferably, the closed movement trajectory generating module specifically includes:

a closed movement trajectory obtaining unit configured to connect a start point and a end point of the circle selection operation when detecting the end of the circle selection operation, and generate the closed movement trajectory according to all of the vector line segments.

In another more preferred embodiment, based on the foregoing embodiment, the handwriting point circle selection determining module specifically includes:

a intersection number judging unit for judging the one of the straight lines located on both sides of the handwriting point Whether the number of intersections is even;

More preferably, the preset threshold is 90 degrees.

The writing stroke circle selecting device provided by the embodiment of the invention passes the straight line passing through the handwriting point to the handwriting point, and whether the handwriting point is located in the circled trajectory according to the number of intersections of the straight line and the user's circled trajectory While internally judging, according to the trajectory angle of the circled trajectory at each intersection, whether the handwriting point is located inside the circled trajectory is further verified, that is, whether the handwriting point is located in the circle according to the double standard Selecting the inside of the track to determine whether the target handwriting of the handwriting point is located inside the circled track, thereby making up for the logic loophole of the traditional handwriting circle selection method, and improving whether the target handwriting composed of the handwriting point is in the circle Selecting the internal accuracy of the track reduces the difficulty of the user's choice of writing strokes on the screen and improves the user experience.

The present invention also provides a touch device.

FIG. 7 is a schematic structural diagram of a preferred embodiment of a touch device provided by the present invention, specifically including at least one memory 71 and at least one processor 72;

The memory 71 includes at least one executable program stored therein;

The executable program, when executed by the processor 72, causes the processor 72 to implement the writing stroke selection method described in any of the above embodiments.

It should be noted that FIG. 7 is only illustrated by taking a memory of the touch device and a processor as an example. In some specific embodiments, the touch device may further include multiple memories and/or multiple processes. The specific number and connection mode of the device can be adjusted and adapted according to actual conditions.

The present invention also provides a computer readable storage medium, particularly comprising a stored computer program, wherein the device in which the computer readable storage medium is controlled to execute the writing handwriting as described in any of the embodiments is executed while the computer program is running Circle method.

It should be noted that all or part of the process of the foregoing embodiments of the present invention may be implemented by a computer program for instructing related hardware, and the computer program may be stored in a computer readable storage medium. The steps of the various method embodiments described above may be implemented when the program is executed by the processor. Wherein, the computer program comprises computer program code, which may be in the form of source code, object code form, executable file or some intermediate form. The computer readable medium may include any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a removable hard disk, a magnetic disk, an optical disk, a computer memory, a read-only memory (ROM). , random access memory (RAM, Random Access Memory), electrical carrier signals, telecommunications signals, and software distribution media. It should be further noted that the content contained in the computer readable medium may be appropriately increased or decreased according to the requirements of legislation and patent practice in jurisdictions, for example, in some jurisdictions, according to legislation and patent practice, computer readable The medium does not include electrical carrier signals and telecommunication signals.

The touch device and the readable storage medium provided by the embodiment of the present invention pass the line passing through the handwriting point to the handwriting point, and whether the handwriting point is located in the circle according to the number of intersections of the straight line and the user's circled track. While judging the inside of the selected track, according to the track angle of the circled track at each intersection, whether the hand point is located inside the circled track is further verified and judged, that is, According to the double standard, it is judged whether the handwriting point is located inside the circled track, and then it is determined whether the target handwriting of the handwriting point is located inside the circled track, thereby being able to make up for the logic loophole of the traditional handwriting circle selection method and improving the judgment of the handwriting. Whether the target handwriting composed of the points is within the circled track accuracy, reduces the difficulty of the user's selected handwriting on the screen, and improves the user experience.

The above is a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. The scope of protection of the present invention.

Claims

A writing stroke circle selection method, comprising: at an electronic device having a touch-sensitive surface:

Monitoring the circle selection operation of the target handwriting on the display interface;

Connecting the touch points detected during the circle selection operation to generate a closed movement trajectory corresponding to the circle selection operation;

Determining whether each of the handwriting points is located in the closed according to an intersection of a straight line corresponding to each of the handwriting points of the target handwriting and the closed moving track and a track angle of the closed moving track at each of the intersection points Moving the inside of the trajectory; wherein the straight line corresponding to the handwriting point is a straight line passing through the handwriting point;

Determining whether the target handwriting is located inside the closed moving track according to the calculated number of the handwriting points located inside the closed moving track;

When it is determined that the target handwriting is located inside the closed movement track, the target handwriting is circled.
The writing stroke circle selection method according to claim 1, wherein the touch points detected during the circle selection operation are connected to generate a closed movement track corresponding to the circle selection operation, Specifically include:

Obtaining a position of a touch point on the touch-sensitive surface every predetermined time during the circle selection operation;

And sequentially connecting the acquired touch points on the touch-sensitive surface to generate corresponding vector line segments;

When the end of the circle selection operation is detected, the start point and the end point of the circle selection operation are connected, and the closed movement track is generated according to all of the vector line segments.
The writing stroke selection method according to claim 2, wherein the trajectory angle is an angle between a direction of the corresponding vector line segment where the intersection point corresponds and a reference direction of the touch-sensitive surface.
The writing stroke circle selection method according to claim 1, wherein said intersection of said straight line corresponding to each of said handwriting points of said target handwriting and said closed moving track and said closed moving track are each The trajectory angle at the intersection point is determined whether each of the handwriting points is located inside the closed movement track, and for each of the straight lines, specifically:

Determining whether the number of the intersection points on both sides of the handwriting point in the straight line are even numbers;

If not, determining that the handwriting point is located inside the closed movement track;

If yes, determining whether a difference in the trajectory angle between the trajectory angles corresponding to each of the intersection points of the same side of the handwriting point in the straight line is less than a preset threshold;

Determining that the handwriting point is located in the closed moving track if, for each side of the handwriting point in the straight line, the two intersection points having the track angle difference value being less than the preset threshold value internal;

Determining that the handwriting point is located in the closed if, for any side of the handwriting point in the straight line, the track angle difference between each two of the intersection points is not less than the preset threshold value Move the outside of the track.
The writing stroke selection method according to claim 4, wherein the preset threshold is 90 degrees.
A writing stroke circle selecting device, comprising:

The circle selection operation monitoring module is configured to monitor the circle selection operation of the target handwriting located on the display interface;

a closed movement trajectory generating module, configured to connect the touch points detected during the circle selection operation to generate a closed movement trajectory corresponding to the circle selection operation;

a handwriting point circle selection judging module, configured to determine, according to an intersection of a straight line corresponding to each handwriting point of the target handwriting and the closed moving track, and a track angle of the closed moving track at each of the intersection points Whether the handwriting point is located inside the closed moving track; wherein the straight line corresponding to the handwriting point is a straight line passing through the handwriting point;

a target handwriting circle selection judging module for calculating the inside of the closed movement track The number of the handwriting points determines whether the target handwriting is located inside the closed moving track;

The target handwriting circle selection module is configured to circle the target handwriting when it is determined that the target handwriting is located inside the closed movement track.
The writing stroke circling device of claim 6, wherein the closed movement trajectory generating module comprises:

a touch point location acquiring unit, configured to acquire a position of a touch point on the touch-sensitive surface every predetermined time during the circle selection operation;

a vector line segment generating unit, configured to sequentially connect the acquired touch points on the touch-sensitive surface to generate corresponding vector line segments; and

a closed movement trajectory obtaining unit, configured to connect a starting point and a ending point of the arranging operation when detecting the end of the circling operation, and generate the closed moving trajectory according to all the vector line segments; The trajectory angle is an angle between a direction of the corresponding vector line segment where the intersection point corresponds and a reference direction of the touch-sensitive surface.
The writing stroke circle selection device according to claim 6, wherein the handwriting point selection determination module comprises:

a intersection number judging unit, configured to determine whether the number of the intersection points on both sides of the handwriting point in the straight line are even numbers;

a first track circle selection result determining unit, configured to determine that the handwriting point is located inside the closed moving track when the number of the intersection points on any side of the handwriting point in the straight line is an odd number ;or,

a trajectory angle difference value determining unit, configured to determine, when the number of the intersection points on both sides of the handwriting point in the straight line are even numbers, determining that the straight line is located on the same side of the handwriting point Whether the difference in the trajectory angle between the trajectory angles corresponding to each of the two intersection points is less than a preset threshold; and

a second hand point circle selection result determining unit for each of the handwriting points in the straight line Determining that the handwriting point is located inside the closed moving track when one side has two intersection points whose track angle difference is less than the preset threshold; or

a third hand point circle selection result determining unit, configured to: when for any side of the handwriting point in the straight line, the track angle difference value between each two of the intersection points is not less than the preset At the threshold, it is determined that the handwriting point is outside the closed moving track.
A touch device, comprising at least one memory and at least one processor;

The memory includes at least one executable program stored therein;

The executable program, when executed by the processor, causes the processor to implement the writing stroke selection method according to any one of claims 1 to 6.
A computer readable storage medium, comprising: a stored computer program, wherein the computer readable storage medium is controlled to execute the apparatus as claimed in claim 1 The writing stroke selection method according to any one of the five.