WO2021077539A1

WO2021077539A1 - Graphic adjustment method and apparatus, device and storage medium

Info

Publication number: WO2021077539A1
Application number: PCT/CN2019/121742
Authority: WO
Inventors: 吴诗乐
Original assignee: 广州视源电子科技股份有限公司; 广州视睿电子科技有限公司
Priority date: 2019-10-23
Filing date: 2019-11-28
Publication date: 2021-04-29
Also published as: CN110956674B; CN110956674A

Abstract

A graphic adjustment method and apparatus, a device and a storage medium, relating to the field of electronic whiteboard technology. The method comprises: displaying a graphic in a canvas (310); receiving a first writing operation, obtaining a first writing track according to the first writing operation, and recognizing the first writing track so as to determine a target geometric attribute represented by the first writing track, wherein the target geometric attribute comprises a length parameter and/or an angle parameter (320); and adjusting the graphic according to the target geometric attribute, so that the target geometric attribute serves as a geometric attribute of the adjusted graphic (330). The described method can solve the technical problem in the related art that a graphic cannot be adjusted accurately and simply.

Description

Graphic adjustment method, device, equipment and storage medium

This disclosure claims the priority of a Chinese patent application filed with the Chinese Patent Office with an application number of 201911010626.X on October 23, 2019, and the entire content of the above application is incorporated into this disclosure by reference.

Technical field

This application relates to the technical field of electronic whiteboards, for example, to a graphic adjustment method, device, device, and storage medium.

Background technique

With the development of computer technology, computer equipment is widely used in various scenes of daily life. For example, smart devices such as tablet computers and TVs with electronic whiteboard functions are widely used in office and teaching scenarios. At this point, the user can perform operations such as writing and drawing on the display screen based on the electronic whiteboard function. For example, in a teaching scenario, the lecturer can draw geometric figures on the display screen through the electronic whiteboard function as needed, and give corresponding explanations to the students. However, the related technology has the following defects: if the lecturer needs to modify the drawn geometric figure, the lecturer usually needs to manually select the adjusted point (such as the vertex), and then adjust the figure by dragging the point. However, because the precision of the drag operation is not high, the adjusted graphics will not match the graphics expected by the lecturer. At this time, the lecturer can only improve the accuracy by repeatedly dragging. In summary, how to adjust graphics accurately and simply has become a technical problem that needs to be solved urgently.

Summary of the invention

The present application provides a graphic adjustment method, device, equipment, and storage medium to solve the technical problem that the graphic cannot be adjusted accurately and simply in the related art.

In the first aspect, this application provides a graphics adjustment method, including:

Display graphics in the canvas;

In response to the received first writing operation, displaying a first writing trajectory, the first writing trajectory representing a target geometric attribute, and the target geometric attribute includes at least one of a length parameter and an angle parameter;

The graphic is adjusted so that the target geometric attribute is the geometric attribute of the adjusted graphic.

After displaying the first writing track in response to the received first writing operation, the method includes:

Based on the target geometric attributes, mark corresponding geometric features in the graphics. The geometric features include edges, corners, or axes, and each target geometric attribute corresponds to one geometric feature.

The marking the corresponding geometric features in the graphics includes:

When the geometric feature corresponding to the target geometric attribute is an edge, the display parameter of the geometric feature is changed;

When the geometric feature corresponding to the target geometric attribute is a corner or an axis, a mark of the geometric feature is added to the graphic.

After displaying the first writing track in response to the received first writing operation, the method further includes:

When it is confirmed that the geometric properties of the target do not meet the conditions for determining the uniqueness of the figure, an adjustment failure prompt is displayed.

The display of graphics in the canvas includes:

In response to the received second writing operation, display a second writing track on the canvas, the second writing track composing a graph; or,

In response to the received graphic template selection operation, a graphic corresponding to the graphic template selection operation is displayed on the canvas.

After the adjusting the graphics so that the target geometric attributes are used as the geometric attributes of the adjusted graphics, the method further includes:

The reshaped first writing trajectory is displayed, and the reshaped first writing trajectory is more computer-drawn elements.

In the second aspect, this application also provides a graphics adjustment method, including:

Display graphics in the canvas;

A first writing operation is received, and a first writing trajectory is obtained according to the first writing operation, and the first writing trajectory is recognized to determine a target geometric attribute represented by the first writing trajectory, and the target geometric attribute includes At least one of length parameter and angle parameter;

The graphic is adjusted according to the target geometric attribute, so that the target geometric attribute is used as the geometric attribute of the adjusted graphic.

The recognizing the first writing trajectory to determine the target geometric attribute represented by the first writing trajectory includes:

Identifying the first writing trajectory to determine the first data parameter and feature type represented by the first writing trajectory;

According to the feature type, a geometric feature corresponding to the first data parameter in the graph is determined, and the geometric feature includes an edge, a corner, or an axis.

The first writing track includes at least one group;

The recognizing the first writing trajectory to determine the first data parameter and characteristic type represented by the first writing trajectory includes:

At least one of number recognition, symbol recognition, and character recognition is performed on each group of the first writing trajectories to determine the first data parameter and feature type represented by each group of the first writing trajectory.

The figure is a polygon;

The determining, according to the feature type, the geometric feature corresponding to the first data parameter in the graph includes:

Acquiring all geometric features in the graph that meet the feature type;

Acquiring first position data of the first writing track;

Among all geometric features satisfying the feature type, the geometric feature closest to the first position data is searched, and the found geometric feature is used as the geometric feature corresponding to the first data parameter.

After recognizing the first writing trajectory to determine the geometric attributes of the target represented by the first writing trajectory, the method includes:

Establish an association relationship between the target geometric attribute and the corresponding geometric feature in the graph, and mark the geometric feature.

The adjusting the graphics according to the target geometric attributes includes:

If the target geometric attribute satisfies the unique determination condition of the figure, the figure is adjusted according to the target geometric attribute.

Also includes:

If the target geometric attributes do not meet the conditions for the unique determination of the figure, a prompt of adjustment failure is displayed; or,

If the target geometric attribute does not satisfy the unique determination condition of the figure, the geometric characteristic corresponding to the target geometric attribute is searched in the figure, the actual geometric attribute of the geometric characteristic is determined, and the target geometric attribute and the geometric characteristic are determined. The actual geometric attributes determine the modification range, and adjust the graphics according to the modification range; or,

If the target geometric attribute does not meet the unique determination condition of the figure, the corresponding geometric feature is searched in the figure according to the unique determination condition of the figure, the actual geometric attribute of the geometric feature is determined, and the target geometry The attributes and the actual geometric attributes adjust the graphics.

The graphic is a polygon, and the adjusting the graphic according to the target geometric attribute includes:

Determining the second position data of all vertices in the graph according to the target geometric attributes;

The adjusted graph is displayed according to the second position data.

The determining the second position data of all vertices in the graph according to the target geometric attributes includes:

Retrieve the characteristic calculation formula of the graph;

Substituting the target geometric attribute into the feature calculation formula to calculate the second data parameter of each edge in the graph;

The second position data of the vertex is determined according to the second data parameter.

The display of graphics in the canvas includes:

Receiving a second writing operation, and displaying a second writing track according to the second writing operation;

Graphic recognition is performed on the second writing trajectory to determine the graphic represented by the second writing trajectory.

In the third aspect, this application also provides a graphics adjustment device, including:

The first display module is used to display graphics in the canvas;

The second display module is configured to display a first writing trajectory in response to the received first writing operation, the first writing trajectory representing a target geometric attribute, and the target geometric attribute includes at least one of a length parameter and an angle parameter;

The first adjustment module is configured to adjust the graphics so that the target geometric attributes are used as the geometric attributes of the adjusted graphics.

In a fourth aspect, this application also provides a graphics adjustment device, including:

The third display module is used to display graphics on the canvas;

The operation receiving module is configured to receive a first writing operation, and obtain a first writing trajectory according to the first writing operation; to recognize the first writing trajectory to determine the target geometric attribute represented by the first writing trajectory, The target geometric attribute includes at least one of a length parameter and an angle parameter;

The second adjustment module is configured to adjust the graphics according to the target geometric attributes, so that the target geometric attributes are used as the geometric attributes of the adjusted graphics.

In a fifth aspect, this application also provides a graphics adjustment device, including:

One or more processors;

Memory, used to store one or more programs;

When the one or more programs are executed by the one or more processors, the one or more processors implement the graphics adjustment method according to the first aspect or the second aspect.

In a sixth aspect, the present application also provides a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, the graphics adjustment method as described in the first aspect or the second aspect is implemented.

The above-mentioned graphic adjustment method, device, equipment and storage medium display the graphic on the canvas, and after receiving the first writing operation, display the first writing trajectory for representing the geometric properties of the target, wherein the geometric properties of the target include length parameters Afterwards, the technical means of adjusting the graphics according to the target geometric attributes realizes the adjustment of the graphics displayed in the canvas by handwriting parameters, so that the adjusted graphics can be more in line with the user’s expectations. And the accuracy of graphics adjustment is high. At the same time, the operation process is simple and convenient, and does not require high user proficiency, which is convenient for users to realize and enhances user experience; inputting graphics by handwriting or computer drawing makes the graphics input methods diversified; marking geometric features can be The user is prompted that the geometric attributes of the target have been identified, thereby ensuring that the graphics adjustment process is carried out accurately.

Description of the drawings

FIG. 1 is a flowchart of a graph adjustment method provided in Embodiment 1 of this application;

2 is a schematic diagram of the first interface of the canvas provided by an embodiment of the application;

FIG. 3 is a schematic diagram of a second interface of the canvas provided by an embodiment of the application;

4 is a schematic diagram of the third interface of the canvas provided by an embodiment of the application;

FIG. 5 is a flowchart of a graph adjustment method provided in Embodiment 2 of this application;

FIG. 6 is a schematic diagram of a fourth interface of the canvas provided by an embodiment of the application;

FIG. 7 is a schematic diagram of the fifth interface of the canvas provided by an embodiment of the application;

FIG. 8 is a schematic diagram of the sixth interface of the canvas provided by an embodiment of the application;

FIG. 9 is a schematic diagram of a seventh interface of the canvas provided by an embodiment of the application;

FIG. 10 is a schematic diagram of the eighth interface of the canvas provided by an embodiment of the application;

FIG. 11 is a schematic diagram of the ninth interface of the canvas provided by an embodiment of the application;

FIG. 12 is a schematic diagram of the tenth interface of the canvas provided by an embodiment of the application;

FIG. 13 is a schematic diagram of the eleventh interface of the canvas provided by an embodiment of the application;

FIG. 14 is a schematic diagram of the twelfth interface of the canvas provided by an embodiment of the application;

15 is a schematic diagram of the thirteenth interface of the canvas provided by an embodiment of the application;

16 is a schematic diagram of the fourteenth interface of the canvas provided by an embodiment of the application;

FIG. 17 is a schematic diagram of the fifteenth interface of the canvas provided by an embodiment of the application;

FIG. 18 is a flowchart of a graph adjustment method provided in Embodiment 3 of this application;

FIG. 19 is a flowchart of a graph adjustment method provided by Embodiment 4 of this application;

20 is a schematic diagram of the sixteenth interface of the canvas provided by an embodiment of the application;

FIG. 21 is a schematic structural diagram of a graphic adjustment device provided by Embodiment 5 of this application; FIG.

FIG. 22 is a schematic structural diagram of another graphic adjustment device provided by Embodiment 5 of this application; FIG.

FIG. 23 is a schematic structural diagram of a graphics adjustment device provided in Embodiment 6 of this application.

Detailed ways

The application will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described here are used to explain the application, but not to limit the application. In addition, it should be noted that, for ease of description, the drawings only show a part of the structure related to the present application instead of all of the structure.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation or object from another entity or operation or object, and do not necessarily require or imply these entities Or any such actual relationship or sequence exists before the operation or object. For example, "first" and "second" of the first writing operation and the second writing operation are used to distinguish two different touch operations.

The graphics adjustment method provided in the embodiments of the present application can be executed by a graphics adjustment device. The graphics adjustment device can be implemented by at least one of software and hardware. The graphics adjustment device may be composed of two or more physical entities, or It is a physical entity. For example, the graphics adjustment device may be a smart device such as a computer, a mobile phone, a tablet, or a smart interactive tablet.

For ease of understanding, in the embodiments, a smart interactive tablet is used as a graphics adjustment device for exemplary description. Among them, the smart interactive tablet can be an integrated device that controls the content displayed on the display tablet through touch technology and realizes human-computer interaction. It integrates a projector, an electronic whiteboard, a screen, a sound, a TV, and a video conference. One or more functions such as a terminal.

Generally speaking, the smart interactive tablet includes at least one display screen. For example, the smart interactive tablet is equipped with a display screen with touch function, and the display screen can be a capacitive screen, a resistive screen or an electromagnetic screen. The user can realize touch operation by touching the display screen with a finger or a stylus. Correspondingly, the smart interactive tablet detects the touch position, and determines the response plan according to the display content corresponding to the touch position, and then responds to realize the touch Features. For example, it is determined that the corresponding display content is the writing area according to the touch position. At this time, the response scheme is to display the writing track. It is understandable that in practical applications, users can also implement control operations through keyboards, mice, physical keys, and other methods.

At least one type of operating system is installed on the smart interactive tablet, where the operating system includes but is not limited to the Android system, the Linux system, and the Windows system. The smart interactive tablet can install at least one application program based on the operating system. In the embodiment, an application program with a drawing function is used for exemplary description. For example, an electronic whiteboard application with a drawing function is installed in a smart interactive tablet. Wherein, the application program may be an application program that comes with the operating system, or may be an application program downloaded from a third-party device or server. Optionally, in addition to the drawing function, the application also has other editing functions, such as writing, inserting tables, inserting pictures, inserting multimedia, inserting graphics, and drawing tables.

Generally, an operable area is set in the display interface of an application program, and the operable area can be recorded as a canvas, through which an interactive interface for drawing or editing can be displayed to the user. Optionally, the display position of the canvas can be set according to actual needs. It is understandable that the size of the canvas can be set according to actual conditions, and it can be a finite size or an infinite size. A first coordinate system is established in the canvas, and the origin of the first coordinate system can be set according to actual conditions. Among them, the infinite size of the canvas means that the canvas can be infinitely reduced or increased in the coordinate system according to the actual needs of the user. Similarly, a second coordinate system is established in the display screen, and the origin of the second coordinate system can also be set according to actual conditions. Generally speaking, the second coordinate system is a coordinate system with a fixed size. Generally, the second coordinate system has a corresponding relationship with the electrical component that detects the touch operation. When the display screen receives the touch operation, the electrical component parameters of the corresponding position change. At this time, the smart interactive tablet will change according to the electrical component parameters. Determine the coordinate data of the touch operation in the second coordinate system, that is, determine the touch position of the touch operation, and then determine the touch operation in the first coordinate system according to the mapping relationship between the second coordinate system and the first coordinate system Then, respond to touch operations based on the display content of the coordinate data in the canvas. Among them, the embodiment of the method for determining the mapping relationship is not limited. In the embodiment, adjusting the geometric characteristics of the graphics in the canvas is taken as an example to describe the graphics adjustment method.

Example one

FIG. 1 is a flowchart of a graph adjustment method provided in Embodiment 1 of this application. Referring to Figure 1, the graphic adjustment method specifically includes:

Step 110: Display graphics on the canvas.

At present, at least one figure is displayed on the canvas. Among them, the figure is a geometric figure, which can be a polygon, a circle-like figure, etc., when the figure is a polygon, it can be selected as a regular convex polygon (such as a triangle, a square, a regular five-sided) Shape, etc.). The graphic can be input by the user by handwriting or by selecting a graphic template. When inputting by handwriting, the user can perform a writing operation on the canvas, where the writing operation is a type of touch operation. After that, the smart interactive tablet displays the writing trajectory and performs graphic recognition on the writing trajectory to determine the type of graphic input by the user. At this time, the displayed graphic belongs to the graphic handwritten by the user. Correspondingly, when inputting by selecting a graphic template, the graphic template corresponding to each graphic type is displayed in the canvas. When the intelligent interactive tablet determines that the user selects the graphic template, the graphic is displayed in the canvas according to the graphic template. At this time, the displayed graphics belong to the standard graphics drawn by the computer. Among them, the way the user selects the graphic template can be set according to the actual situation. For example, the graphic template is dragged to the canvas through a drag operation, and the smart interactive tablet obtains the end position of the drag operation, and displays the graphic at the end position. The graphics corresponding to the template. It is understandable that each graphic type corresponds to a graphic template, wherein the classification basis of the graphic type can be set according to the actual situation, for example, according to the number of graphic edges. At this time, the graphic type includes at least: circle, triangle Class, quadrilateral class, pentagon class, etc. Each type can also be subdivided. For example, the quadrilateral type can also include: square type, rectangular type, parallelogram type, trapezoid type and other graphic types. Triangle type can also include right-angled triangle type, isosceles triangle type, and ordinary triangle type. And other graphic types. It should be noted that the above-mentioned end position may refer to coordinate data in the first coordinate system or coordinate data in the second coordinate system, which is not limited in the embodiment.

Step 120: In response to the received first writing operation, display a first writing trajectory, the first writing trajectory represents a target geometric attribute, and the target geometric attribute includes at least one of a length parameter and an angle parameter.

Specifically, in order to adjust the graphics, the user can input the target geometric attributes in the canvas. The geometric attributes are the parameters of the geometric characteristics of the graphics. The geometric feature refers to the feature that determines the geometric shape when displaying graphics, and generally can include at least one of edges, corners, and axes. Among them, the axis refers to other lines that can determine the shape and size of the displayed image, except for the sides. For example, for a circle, the axis can refer to at least one of a radius and a diameter. For a parallelogram, the axis can refer to a certain side. perpendicular. The geometric properties include length parameters and angle parameters. When the geometric feature is an axis or an edge, the corresponding geometric attribute is a length parameter, and when the geometric feature is an angle, the corresponding geometric attribute is an angle parameter. In order to simplify the calculation complexity, when the figure is set as a circle-like figure, the geometric feature contained in the figure is an axis, and when the figure is a polygon, the geometric feature contained in the figure is at least one of edges and corners. For example, when the graph type is circle, the geometric attribute refers to the length parameter of the axis. Wherein, when the figure is a circle, the axis is at least one of a radius and a diameter. Correspondingly, the geometric attribute refers to at least one of the length parameter of the radius and the length parameter of the diameter. When the figure is an ellipse, the axis is at least one of the minor axis, major axis, minor minor axis and major minor axis. Correspondingly, the geometric attributes refer to the minor axis length parameter, major axis length parameter, minor minor axis length parameter, and major half axis. At least one of the length parameters. For another example, when the graphic is a polygon, the geometric attribute refers to at least one of the length parameter of the side and the angle parameter of the corner. For example, when the figure is a triangle, the geometric features include three sides and three corners. Correspondingly, the geometric attributes can be the length parameter of each side and the angle parameter of each corner. When the figure is a rectangle, the geometric features include short sides and long sides. Correspondingly, geometric attributes refer to the length parameters of the short sides and the length parameters of the long sides. It is understandable that the length and angle parameters mentioned above are all relative values. Accordingly, the range of the coordinates (in the first coordinate system or the second coordinate system) corresponding to the length unit and the angle unit can be set according to actual conditions. The embodiment does not limit this. In the embodiment, the geometric attribute input by the user is recorded as the target geometric attribute.

The target geometric attributes are written on the canvas by the user by handwriting. In the embodiment, the user's operation of writing the target geometric attribute is recorded as the first writing operation. Optionally, the embodiment of the trigger mode of the first writing operation is not limited. For example, when it is determined that the canvas is currently in writing mode, it is monitored that a touch operation is received in the canvas, and the touch operation is a touch operation that includes a moving path, then it is determined that there is currently a writing behavior in the canvas, and the touch operation It is confirmed as the first writing operation, and then the writing track generated corresponding to the first writing operation is displayed at the touch position. It is understandable that for the smart interactive tablet, during the user's writing process, the smart interactive tablet only receives a writing operation, and then it needs to identify the writing track of the writing operation to determine whether the writing operation is used for writing. Enter the geometric properties of the target. In the embodiment, only to distinguish the first writing operation currently received from the subsequent second writing operation, the first writing operation is interpreted as an operation for writing a target geometric attribute. For another example, set the graphics adjustment mode. When it is determined that the canvas is currently in the graphics adjustment mode, if a touch operation is detected in the canvas, it is determined that the first writing operation is received. In the embodiment, the writing trajectory corresponding to the first writing operation is recorded as the first writing trajectory. Optionally, take a number as an example. Considering that in actual applications, when a user writes a number, it may need to write multiple first writing tracks (for example, the number 4 requires two writing tracks). At this time, the set conditions can be satisfied The multiple first writing tracks are grouped into a group, where the setting conditions can be set according to the actual situation. For example, the setting condition is that the writing time interval of the multiple first writing tracks is within the set interval and the multiple first writing tracks The distance between the writing tracks is within the set distance, and the above set interval and set distance are set according to the actual situation. The advantage of grouping multiple first writing trajectories is to facilitate the management and calculation of the first writing trajectory. Taking management as an example, when moving the first writing trajectory, there is no need to calculate the movement path of each trajectory one by one, only the movement path of the smallest rectangular area containing the group of writing trajectories needs to be calculated.

In the embodiment, the first writing track is set as the target geometric attribute written by the user. Since when receiving the first writing operation, the smart interactive tablet can only recognize the first writing operation and display the first writing track, it is impossible to determine whether the first writing operation is used to write the target geometric attributes. Therefore, when the first writing trajectory is displayed, the first writing trajectory needs to be recognized to determine the geometric attributes of the target represented by the first writing trajectory. Specifically, after a set of first writing trajectories are determined to be written, perform number recognition, symbol recognition, and character recognition on the first writing trajectory to determine the data parameters and feature types represented by the first writing trajectory, that is, determine the first writing trajectory Represents the geometric properties of the target. Among them, the implementation means of number recognition, symbol recognition, and character recognition are not limited in the embodiment. The feature type refers to the geometric feature represented by the data parameter.

Optionally, in order to adjust the graphics, it is necessary to determine the graphics corresponding to the target geometric attributes, and determine the geometric features in the graphics corresponding to the target geometric attributes. Among them, when determining the graphic corresponding to the target geometric attribute, if there is only one graphic displayed, the graphic can be directly determined as the graphic corresponding to the target geometric attribute. If there are multiple graphs displayed, you can obtain the position data of the target geometric property in the canvas and the position data of each graph in the canvas, and based on the two position data, determine the graph closest to the target geometric property, and add the graph Determine the graphics corresponding to the target geometric attributes. Wherein, the two position data belong to the same coordinate system, which can be located in the first coordinate system or the second coordinate system, which is not limited in the embodiment. When determining the geometric feature corresponding to the target geometric attribute in the graph, all geometric features of the same type are determined in the graph according to the feature type, and the geometric feature closest to the first writing track is selected as the geometric feature corresponding to the target geometric attribute. For example, if the radius is marked as R and the diameter is marked as L, when it is confirmed that the figure is a circle and the first writing track is recognized as R3, the data parameter is determined to be R3, and the feature type is radius, that is, the target geometric attribute corresponds to The geometric feature is the radius, and the length parameter is 3. For another example, if the angle is set as R and the side length is L, when it is determined that the figure is a triangle, and the first writing track is recognized as including two groups, R60 and L5, then the characteristic type corresponding to R60 is determined to be angle , The angle parameter is 60, the geometric feature corresponding to L5 is an edge, and the length parameter is 5. According to the distance between each edge and the target geometric attribute, the edge with the closest distance is selected as the geometric feature corresponding to L5, and the angle is the same. For another example, the angle is marked as °, and there is no sign on the side. When it is determined that the figure is a triangle and the first writing track is identified as containing two groups, namely 60° and 5, it is determined that the characteristic type corresponding to 60° is an angle, and the angle parameter is The geometric feature corresponding to 60 and 5 is an edge, and the length parameter is 5. According to the distance between each edge and the target geometric attribute, the edge with the closest distance is selected as the geometric feature corresponding to 5, and the angle is the same.

Optionally, after determining the target geometric attribute represented by the first writing trajectory, in order to notify the user that the intelligent interactive tablet currently recognizes the target geometric attribute, the target geometric attribute may be bound to the graphic and marked in the graphic. Among them, the marking method can be set according to the actual situation. For example, when the target geometric attribute is the angle parameter of an angle, a mark is added at the position of the corresponding corner. For example, when the target geometric attribute is the length data of an edge, the display parameter of the corresponding edge is changed. . For another example, when the target geometric attribute is the length data of the axis, mark the corresponding axis in the graph.

Step 130: Adjust the graphics so that the target geometric attributes are used as the geometric attributes of the adjusted graphics.

Exemplarily, the graphics are adjusted according to the target geometric attributes, so that the adjusted graphics are displayed according to the target geometric attributes. When adjusting the graphics, it is first necessary to determine the unique determination conditions for the graphics corresponding to the graphics. Among them, the graphics unique determination condition includes all the necessary conditions for determining the graphics. For example, when the figure is a circle, the only condition for determining the circle figure can be to specify the radius length or the diameter length. When the figure is an ellipse, the only condition for determining the figure of the ellipse can be to specify the length of the minor axis and the length of the major axis, or the length of the minor axis and the length of the major axis. When the figure is a triangle, the only condition for determining the figure of the triangle can be to clarify the length of the three sides, the length of the two sides and the angle between the two sides, or the angle of the two corners and the side between the two corners. Length etc. When the figure is a square, the only condition for determining the square figure can be to specify the length of the side. Determining whether the target geometric attribute meets the unique determination condition of the figure, that is, judging whether the figure can be obtained according to the target geometric attribute, and if it is, the operation of adjusting the figure is performed; otherwise, the user is prompted that the adjustment has failed. Among them, the specific method for determining whether the target geometric attribute meets the condition for determining the uniqueness of the figure can be set according to the actual situation. For example, if the figure is a triangle, the target geometric attribute includes the angle of two corners and the length of one side. The positional relationship with an edge satisfies the unique determination condition of the figure, then it is determined that the target geometric attributes meet the unique determination condition of the figure.

In another embodiment of the present application, when the target geometric attributes do not meet the conditions for determining the uniqueness of the figure, the actual geometric attributes of the geometric features corresponding to the target geometric attributes in the graphics can be determined, where the actual geometric attributes are the geometric attributes obtained based on the graphics. The current geometric properties of the feature. Likewise, the actual geometric properties are relative values. After that, the ratio between the target geometric attribute and the actual geometric attribute is used as the modification range, and the actual geometric attributes corresponding to other geometric features in the graph are modified according to the modification range to realize the adjustment of the graph.

In yet another embodiment of the present application, when the target geometric attribute does not satisfy the condition for determining the uniqueness of the figure, other geometric features can be searched in the figure according to the condition for determining the uniqueness of the figure, and the geometric features corresponding to the target geometric attributes can be found to satisfy The conditions are uniquely determined for the graphics, and then the actual geometric attributes corresponding to the found geometric features are determined, and the graphics are adjusted according to the actual geometric attributes and the target geometric attributes.

When adjusting graphics, you need to determine the position data of each geometric feature first, and then redraw the graphics based on the position data, and delete the unadjusted graphics. At this time, the drawn graphics belong to the standard graphics drawn by the computer. Specifically, when the figure is a polygon, the position data of the vertices in the adjusted figure in the canvas is determined based on the target geometric properties, and then the figure is drawn based on the position data of the vertices. Among them, when determining the position data of the vertices, the feature calculation formula can be called, and the length data of each side in the adjusted graph is calculated according to the feature calculation formula. Among them, the feature calculation formula is pre-stored in the smart interactive tablet, and at least one of the side length and the angle can be calculated. For example, when the figure is a triangle, the corresponding characteristic calculation formula includes the sum of three internal angles of 180°, the Pythagorean theorem, the law of sine, the law of cosine, and so on. After that, the position data of the vertex is determined according to the length data of each side. When the figure is a circle figure, the position data of the edge of the circle figure in the canvas is directly determined based on the target geometric properties, and then the figure is drawn based on the position data of the edge.

Optionally, after the graphics are adjusted, the target geometric attributes are simultaneously reshaped and displayed in the graphics. Among them, shaping the geometric properties of the target can be understood as shaping the first writing trajectory into a computer drawing element. Among them, the relative position relationship between geometric attributes and geometric features can be set in advance, and then, based on the relative position relationship, the reshaped target geometric attributes are displayed in the graphics.

The technical solution provided by this embodiment will be exemplarily described below.

FIG. 2 is a schematic diagram of the first interface of the canvas provided by an embodiment of the application. Referring to FIG. 2, a graphic 11 is displayed on the current canvas. The graphic 11 is a graphic input by the user by handwriting. Through graphic recognition, it is determined that the graphic 11 is a triangle.

The first writing operation input by the user is received, and the first writing track is displayed. After displaying the first writing track, the interface of the canvas changes from Figure 2 to Figure 3. FIG. 3 is a schematic diagram of a second interface of the canvas provided by an embodiment of the application. Referring to Figure 3, the canvas contains three groups of first writing trajectories, and after the first writing trajectory is digitally recognized, it is determined that the first writing trajectories of each group are respectively: 3, 4, and 5, that is, the first writing trajectory represents the geometric properties of the target Is the length parameter of the side, and the values are 3, 4, and 5 respectively. Then, based on the distance between the target geometric attribute and the three edges in the graph 11, the edge corresponding to each target geometric attribute is determined. At this time, it can be determined that after the adjustment of the graph 11, the lengths of the three sides are 3, 4, and 5 respectively. Adjust the triangle according to the geometric properties of the target. At this time, the interface of the canvas changes from Figure 3 to Figure 4. FIG. 4 is a schematic diagram of the third interface of the canvas provided by an embodiment of the application. Referring to Fig. 4, after adjusting the graph 11, it is displayed as a standard graph drawn by a computer.

As mentioned above, by displaying the figure in the canvas, and after receiving the first writing operation, displaying the first writing trajectory for representing the geometric properties of the target, wherein the geometric properties of the target include at least one of a length parameter and an angle parameter, and then according to The technical means of adjusting the graphics with the target geometric attributes realizes the adjustment of the graphics displayed on the canvas by means of handwriting parameters, so that the adjusted graphics can be more in line with the user's expectations. At the same time, the operation process is simple and convenient, does not require high user proficiency, is convenient for users to realize, and improves user experience.

Example two

FIG. 5 is a flowchart of a graph adjustment method provided in Embodiment 2 of this application. This embodiment is embodied on the basis of the above-mentioned embodiment.

Specifically, referring to FIG. 5, the graph adjustment method provided in this embodiment specifically includes:

Step 210: Display graphics on the canvas.

In the embodiment, the setting of this step includes at least two solutions as follows:

Solution 1: In response to the received second writing operation, a second writing track is displayed on the canvas, and the second writing track composes a graph.

In the embodiment, the touch operation of the user's handwriting drawing graphics is recorded as the second writing operation. Wherein, the second writing operation trigger mode can be set according to actual conditions. For example, when it is determined that the canvas is currently in the writing mode, it is monitored that a touch operation is received in the canvas, and the touch operation is a touch operation that includes a moving path. It is determined that the second writing operation is received, and the touch position of the second writing operation is acquired, and then the writing track is displayed at the touch position. It can be understood that for the smart interactive tablet, the smart interactive tablet is Only when a writing operation is received, and the writing track of the writing operation needs to be recognized later, can it be determined whether the writing operation is used to draw a graph. In the embodiment, only to distinguish the currently received second writing operation from the first writing operation, the second writing operation is interpreted as an operation for drawing graphics. The writing trajectory corresponding to the second writing operation is recorded as the second writing trajectory. At this time, it can be set to group multiple writing trajectories that meet the set conditions into a group, where the grouping condition is the same as the grouping condition of the first writing trajectory, and will not be repeated here.

Since the smart interactive tablet can only recognize the second writing operation and display the second writing trajectory, and cannot determine whether the second writing operation is used to draw graphics, it is necessary to recognize the second writing trajectory when displaying the second writing trajectory. To determine whether the second writing track can form a graph. Among them, the embodiments of the identification means are not limited. For example, collect a data set containing various graphics in advance, and train the data set through machine learning to obtain a graphics recognition model. The algorithm used in training can be set according to the actual situation. After that, a set of second The writing trajectory is used as the input of the graphic recognition model, and the graphic category corresponding to the second writing trajectory can be determined through the graphic recognition model. For another example, the trajectory samples corresponding to each graphic category are preset, wherein the embodiment of the setting method of the trajectory samples is not limited. Identify the second writing trajectory and each trajectory sample to obtain the trajectory sample that is most similar to the second writing trajectory, and then calculate the trajectory error between the trajectory sample and the second writing trajectory, and when the trajectory error meets the set error range At this time, the graphic type corresponding to the trajectory sample is used as the graphic type corresponding to the second writing trajectory. Among them, the calculation method of the trajectory error and the setting of the error range are not limited according to the embodiment.

When the trigger mode of the first writing operation and the second writing operation are the same, the writing trace can be displayed first, and a group of writing traces can be recognized by graphics. If the corresponding graphics cannot be recognized, then the number recognition, symbol recognition and text recognition can be performed , To determine the geometric properties of the target represented by the writing trajectory.

Solution 2: In response to the received graphic template selection operation, a graphic corresponding to the graphic template selection operation is displayed on the canvas.

Exemplarily, the graphic template is a graphic drawn by a computer as a template. Optionally, a graphic template corresponding to each graphic type is displayed on the canvas, wherein the generating method and storage location of the graphic template are not limited in the embodiment. In the writing mode, the graphic template can be displayed on the set position of the canvas, or the trigger button of the graphic template is displayed at the set position. When the trigger button is detected to be triggered, the graphic template is displayed. Among them, the set position can be set or modified according to the actual situation. When there are few types of graphics (such as less than or equal to the set number), all graphics templates can be displayed; when there are many types of graphics (such as greater than the set number), graphics templates of some graphics types can be displayed, and set Set graphics template switching rules to achieve switching display graphics templates, where the switching rules can be set according to actual conditions.

The graphic template selection operation is an operation issued by the user to select a graphic template. The smart interactive tablet draws a corresponding graphic on the canvas according to the graphic template selection operation. Among them, the embodiment of the trigger mode of the graphic template selection operation is not limited. For example, when setting the graphic template to receive a drag operation, confirm that the graphic template selection operation is received, and monitor the drag operation to control the graphic template to move synchronously with the drag operation. When the end of the drag is detected, the end position is obtained, and Draw the graph at the end position. For another example, it is detected that the graphic template receives the click operation, and then the click operation is received again in other areas of the canvas, and the graphic template selection operation is determined to be received. The first click operation is used to select the graphic template. The second single-click operation is used to determine the drawing position of the graph, and then, taking the drawing position as the center, draw the same type of graph as the graph template. The drawing position may refer to coordinate data in the first coordinate system or coordinate data in the second coordinate system, which is not limited in the embodiment.

Step 220: In response to the received first writing operation, display a first writing trajectory, where the first writing trajectory represents a target geometric attribute, and the target geometric attribute includes at least one of a length parameter and an angle parameter.

Step 230: Mark the corresponding geometric features in the graphics based on the target geometric attributes. The geometric features include edges, corners or axes, and each target geometric attribute corresponds to a geometric feature.

In order to enable the user to clearly write the target geometric attributes to have an association relationship with the graphics, it is set to mark the geometric features corresponding to the target geometric attributes in the graphics. Among them, each target geometric attribute can find the corresponding geometric characteristic in the graph, and mark the geometric characteristic corresponding to each target geometric attribute.

Optionally, marking the geometric features in the target graphic includes: when the geometric feature corresponding to the target geometric attribute is an edge, changing the display parameters of the geometric feature; when the geometric feature corresponding to the target geometric attribute is an angle or axis, adding geometry to the graphic Characteristic mark.

Among them, when the target geometric attribute corresponds to the edge of the figure, the display parameter of the edge is changed. Among them, the display parameters are: line thickness, line color, line type, etc. The intelligent interactive tablet can automatically set the replacement standard of display parameters, or the user can set the replacement standard of display parameters. Usually the replacement standard can be changed by the user according to the actual situation. For example, FIG. 6 is a schematic diagram of the fourth interface of the canvas provided by an embodiment of the application. Referring to FIG. 6, a graphic 201 and a target geometric attribute 202 are displayed on the canvas. It is determined that the bottom edge of the graph 201 is the geometric feature corresponding to the target geometric attribute, and the display parameters of the bottom edge are changed. At this time, the interface of the canvas changes from FIG. 6 to FIG. 7. FIG. 7 is a schematic diagram of the fifth interface of the canvas provided by an embodiment of the application. Compared with FIG. 6, the line type of the bottom edge of the graph 201 in FIG. 7 has changed. At this time, the user can be prompted to establish an association relationship between the target geometric attribute and the graph.

When the target geometric attribute corresponds to the corner of the figure, add a corner mark at the corresponding corner in the figure, where the display mode of the corner mark can be set according to the actual situation. For example, FIG. 8 is a schematic diagram of the sixth interface of the canvas provided by the embodiment of the application. Referring to FIG. 8, the graphic 203 and the target geometric attribute 204 are displayed in the canvas. The target geometric attribute 204 corresponds to the bottom corner on the left side of the graphic 203. , Add a corner mark 205 at the bottom corner on the left to prompt the user to establish an association relationship between the target geometric attributes and the graphics. It is understandable that the display parameters of the lines in the corner marks can be modified in accordance with actual conditions. In practical applications, the user can also directly draw corner marks when writing the target geometric attributes. At this time, the smart interactive tablet can determine the angle corresponding to the target geometric attributes according to the detected corner marks, and calculate the radian of the corner marks drawn by the user. Make corrections to prompt the user that the target geometry attributes are bound to the corners.

When the target geometry attribute corresponds to the axis of the graph, the axis is displayed in the graph, and the displayed axis is used as the axis label. The display parameters of the axis are different from the display parameters of the edge of the graph to distinguish between the axis and the edge. For example, FIG. 9 is a schematic diagram of the seventh interface of the canvas provided by an embodiment of the application. Referring to FIG. 9, a graphic 206 and a target geometric attribute 207 are displayed on the canvas. The target geometric attribute 207 corresponds to the radius in the graphic 206. At this time, the corresponding axis 208 is displayed in the graphic 206 to prompt the user of the target geometric attribute and graphic Establish an association relationship. In practical applications, the user can also directly draw the line of the axis when writing the target geometric attributes. At this time, the smart interactive tablet can determine the axis represented by the line according to the relative position of the line and the figure, and modify the line And modify the display parameters to prompt the user that the target geometric attributes are bound to the axis.

Optionally, when there are multiple target geometric attributes, the multiple target geometric attributes need to be input sequentially. At this point, after each detection of a set of first writing trajectories, the first set of writing trajectories are identified to determine the target geometric attributes and corresponding geometric features they represent, and then the corresponding geometric features are performed in the graphics. mark.

Step 240: Confirm whether the geometric attributes of the target meet the conditions for determining the uniqueness of the figure. If it is confirmed that the geometric properties of the target do not satisfy the condition for determining the uniqueness of the figure, step 250 is executed. If it is confirmed that the geometric properties of the target satisfy the condition for determining the uniqueness of the figure, step 260 is executed.

Specifically, each type of graphics has corresponding graphics unique determination conditions. After marking the graph, call up the graph's unique determination condition corresponding to the graph. Among them, the geometric features required to determine the size of the figure are recorded in the unique determination condition of the figure, and when there are multiple geometric features, in addition to the parameters of the geometric features, the positional relationship between the geometric features is also recorded. Compare the geometric features with the geometric features recorded in the graphics unique determination condition. If there are multiple geometric features, compare the position relationship of the geometric features with the position relationship recorded in the graphics unique determination condition. If they are consistent, it is determined that the uniqueness is satisfied. Determine the conditions and execute step 260; otherwise, execute step 250. Among them, the positional relationship can be determined by the display position of the geometric feature in the canvas.

For example, the figure is a circle, and the target geometric property is the length of the radius. At this time, the only condition for obtaining a circle is to specify the length of the semi-axis or the length of the diameter. After that, it is determined that the geometric properties of the target satisfy the condition for determining the uniqueness of the figure, and step 260 is executed.

For another example, the figure is a rectangle, and there are two target geometric attributes, which correspond to the length parameters of the two sides respectively. At this time, the only condition for obtaining the graph is to clarify the length parameters of the two adjacent sides. Since the edges corresponding to the target geometric attributes have been marked, this step can directly determine whether the two marked edges are two adjacent edges. After determining that the two marked edges are two adjacent edges At this time, it is determined that the conditions for determining the graphic position are satisfied, and step 260 is executed. The method for determining adjacent edges can be set according to actual conditions. For example, when it is determined that there is an intersection point between two edges, the two edges are determined to be adjacent edges. For another example, the two sides are determined to be adjacent sides according to the coordinate data of the two sides in the first coordinate system or the second coordinate system.

For another example, the figure is a triangle, and there are two target geometric attributes, which correspond to the length parameters of the two sides respectively. At this time, the only determination condition for obtaining the graph is: clarify the length of the three sides, the length of the two sides and the angle between the two sides, or the angle of the two corners and the length of the side between the two corners, etc. Since the edges corresponding to the target geometric attributes have been marked, this step can directly clarify whether the two marked edges meet the conditions for determining the uniqueness of the figure. Determine whether the two marked edges meet any of the above-mentioned unique determination conditions for graphics. At this time, it can be known that the two marked edges do not satisfy the condition for determining the uniqueness of the graph through the above-mentioned uniqueness determination condition of the graph. And step 250 is executed.

Step 250: Display an adjustment failure prompt.

Among them, the display mode of the adjustment failure prompt can be set according to the actual situation. For example, a prompt box pops up in the canvas, and the prompt box displays the text "known attributes are insufficient, and the graph cannot be adjusted" to prompt the user that the adjustment has failed. For another example, cancel the marked geometric feature to remind the user that the adjustment has failed. The advantage of setting the adjustment failure prompt is that the user can rewrite the target geometric attributes according to the prompt to accurately realize the graphic adjustment.

Step 260: Adjust the graphics so that the target geometric attributes are used as the geometric attributes of the adjusted graphics, and the reshaped first writing trajectory is displayed, and the reshaped first writing trajectory is a computer drawing element.

Optionally, when adjusting the graphics, synchronously modify the first writing trajectory representing the target geometric attributes, that is, change the target geometric attributes to numbers, letters or symbols with a set font and size for display. Numbers, letters, or symbols that set the font and size can be understood as elements drawn by a computer. Wherein, after the data parameters are obtained by recognizing the first writing track, the characters with the same content of the data parameters and the set font and size are obtained, and when the graphics are adjusted, the first writing track is replaced with the corresponding characters synchronously. It is understandable that obtaining characters with the same content as the first writing track and setting the font and size can also be considered as shaping the target geometric attributes represented by the first writing track. The benefit of reshaping is that it improves the aesthetics of the display, and the user can determine whether the intelligent interactive tablet recognizes accurately through the geometric properties of the target after reshaping.

Optionally, when the graph is adjusted, all geometric features of the graph or geometric attributes corresponding to specific geometric features can be displayed in the graph. That is, when the graphics are adjusted, the geometric attributes corresponding to the remaining geometric features except the target geometric attributes are synchronously determined, and displayed with the set font and size.

The relative position relationship between each geometric feature and the corresponding geometric attribute is preset, and the relative position relationship is changeable. After obtaining the character corresponding to the geometric attribute, the character is displayed according to the relative position relationship, that is, the geometric attribute is displayed. At the same time, the original first writing track is deleted. Optionally, when displaying geometric attributes, if the corresponding geometric feature is a corner, the corner mark can be displayed simultaneously. If the geometric feature is an axis, the axis can be displayed simultaneously. After displaying the geometric attributes, the user can delete the geometric attributes according to actual needs, wherein the specific implementation means of the deletion operation is not limited in the embodiment.

The technical solution provided by this embodiment will be exemplified below.

Example 1. FIG. 10 is a schematic diagram of the eighth interface of the canvas provided by an embodiment of the application. Referring to FIG. 10, a graphic 209 is displayed on the canvas. The graphic 209 is input by the user through a graphic template selection operation, and the graphic 209 is a triangle.

The first writing operation input by the user is received, and the first writing track is displayed. After displaying the first writing track, the interface of the canvas changes from Figure 10 to Figure 11. FIG. 11 is a schematic diagram of the ninth interface of the canvas provided by an embodiment of the application. Referring to Figure 11, the canvas contains three sets of first writing trajectories, and after performing number recognition and symbol recognition on the first writing trajectories, the first writing trajectories are determined to be 6, 45°, and 45° respectively, and then the first writing trajectory is determined Represents the geometric properties of the target. After that, it is determined that the target geometric attributes respectively correspond to the bottom edge and the two bottom corners of the figure 209. After that, the bottom edge and two bottom corners of the figure 209 are marked. At this time, the interface of the canvas changes from Figure 11 to Figure 12. FIG. 12 is a schematic diagram of the tenth interface of the canvas provided by an embodiment of the application. Figure 12 can prompt the user to establish an association relationship between the target geometric attributes and the graphics.

It is confirmed that the unique triangle can be obtained through the target geometric properties, that is, the unique determination condition of the graphic is satisfied, and then the graphic is adjusted, that is, the triangle is redrawn on the canvas and the triangle drawn before is deleted. At this time, the interface of the canvas changes from Figure 12 to Figure 13. FIG. 13 is a schematic diagram of the eleventh interface of the canvas provided by an embodiment of the application. Referring to FIG. 13, after the graphic 209 is adjusted, it is displayed as a standard graphic drawn by the computer, and at the same time, the geometric attributes of all geometric features of the graphic 209 are displayed.

Example 2. FIG. 14 is a schematic diagram of the twelfth interface of the canvas provided by an embodiment of the application. Referring to FIG. 14, a graphic 2010 is displayed on the canvas. The graphic 2010 is input by the user through a graphic template selection operation, and the graphic 2010 is circular.

The first writing operation input by the user is received, and the first writing track is displayed. After displaying the first writing track, the interface of the canvas changes from Figure 14 to Figure 15. FIG. 15 is a schematic diagram of the thirteenth interface of the canvas provided by an embodiment of the application. Referring to FIG. 15, the canvas contains a set of first writing trajectories, and after performing number recognition and character recognition on the first writing trajectory, it is determined that the first writing trajectory is: R3 and represents the radius, and then it is determined that the first writing trajectory represents the geometric attributes of the target . After that, it is determined that the target geometric attribute corresponds to the radius of the figure 2010. After that, the radius of the figure 2010 is marked. At this time, the interface of the canvas changes from Figure 15 to Figure 16. FIG. 16 is a schematic diagram of the fourteenth interface of the canvas provided by an embodiment of the application. Figure 16 can prompt the user to establish an association relationship between the target geometric attributes and the graphics.

It is confirmed that the unique circle can be obtained through the target geometric properties, that is, the unique determination condition of the figure is met, and then the figure is adjusted, that is, the circle is redrawn on the canvas and the circle entered before is deleted. At this time, the interface of the canvas changes from Figure 16 to Figure 17. FIG. 17 is a schematic diagram of the fifteenth interface of the canvas provided by an embodiment of the application. Referring to FIG. 17, after adjusting the graphic 2010, it is displayed as a standard graphic drawn by the computer, and at the same time, the target geometric attributes are changed to the set font and size for display.

As mentioned above, by displaying the figure on the canvas, and when the first writing operation is received, the first writing track used to represent the geometric properties of the target is displayed, after which the corresponding geometric features in the figure are marked, and the geometric properties of the target are confirmed The graphic is adjusted when the unique determination condition of the graphic is satisfied, so that the target geometric property is used as the technical solution of the adjusted geometric property of the graphic, which realizes the dynamic adjustment of the graphic displayed in the canvas by means of handwriting parameters. Inputting graphics by handwriting or computer drawing makes the graphics input methods diversified, and by marking geometric features, the user can be reminded that the target geometric attributes have been recognized, thereby ensuring the accuracy of the graphics adjustment process. At the same time, by setting the conditions for determining the uniqueness of the graphics, and displaying the adjustment failure prompt when the target geometric attributes do not meet the conditions for determining the uniqueness of the graphics, the user can clarify whether the target geometric attributes can adjust the graphics, especially in teaching scenarios. Show students what geometric features and geometric attributes need to be included in the figure, making the teaching scene more flexible and vivid.

Example three

FIG. 18 is a flowchart of a graph adjustment method provided in Embodiment 3 of this application. The graphics adjustment method provided in this embodiment and the graphics adjustment method provided in the foregoing embodiments are applied in the same usage scenarios. Referring to FIG. 18, the graphics adjustment method provided by this embodiment specifically includes:

Step 310: Display graphics on the canvas.

In an embodiment, the setting of this step includes at least one of the following schemes:

Solution 1: Step 311: Receive the second writing operation, and display the second writing track according to the second writing operation. Step 312: Perform graphic recognition on the second writing trajectory to determine the graphic represented by the second writing trajectory.

Specifically, when it is determined that at least one of the second writing operation is not received within the set time period and the set distance range, the completion of the second writing operation input is confirmed, and the displayed second writing track is graphically recognized. Among them, the embodiment of the means of pattern recognition is not limited. For example, a machine learning method is used to train a data set composed of a large number of graphs of known categories in advance to obtain a graph recognition model. After that, the second writing trajectory is used as the input of the pattern recognition model, and the figure represented by the second writing trajectory is determined by the output result of the pattern recognition model. For another example, pre-set trajectory samples of various graphics. After that, the second writing trajectory is matched with the trajectory samples of various types of patterns one by one, and the figure corresponding to the closest trajectory sample is determined as the figure represented by the second writing trajectory. Wherein, the trajectory error between the second writing trajectory and the closest trajectory template needs to be within the set error range, otherwise, it is determined that the second writing trajectory cannot be recognized.

Solution 2: Step 313: Receive the graphic template selection operation, and confirm the graphic type selected by the graphic template selection operation. Step 314: Draw a graph on the canvas based on the graph type.

Optionally, when the graphic template selection operation is realized by a drag operation, the smart interactive tablet receives a touch operation. If it is determined that the touch position of the touch operation is the display position of a certain graphic template, and the touch operation of the touch operation If the control mode is a mobile operation, it is determined that the graphic template selection operation is received. After that, monitor the current touch position of the touch operation in real time, and after confirming the end of the touch operation, obtain the touch position at the end, and use the touch position at the end as the center of the graph to draw a graphic corresponding to the graphic template. Among them, after obtaining the finished touch position, identify whether the finished touch position is in the canvas, if it is in the canvas, draw the corresponding figure, otherwise, end this operation.

Optionally, when the graphic template selection operation is realized by a single-click operation, the smart interactive tablet receives a single-click touch operation, and if it is determined that the touch position of the touch operation is the display position of a certain graphic template, it is determined A graphic template selection operation is received. After that, a graphic corresponding to the graphic template is drawn in the set position of the canvas. After drawing the graph, the user can move the graph in the canvas.

Optionally, when the graphic template selection operation is implemented for multiple click operations, the smart interactive tablet receives the touch operation in the form of a click for the first time, and determines that the touch position of the touch operation is the display position of a certain graphic template , If within the set time interval, the touch operation in the form of a click is received again in the canvas, it is determined that the graphic template selection operation is received, and the touch position of the re-click is obtained, and then the touch position is drawn as the center of the graphic The graphics corresponding to the graphics template.

It can be understood that the display sizes of various types of graphics are preset, and when the graphics are drawn according to the selection operation of the graphics template, they are displayed according to the preset display size.

Step 320: Receive the first writing operation, and obtain the first writing trajectory according to the first writing operation, and recognize the first writing trajectory to determine the target geometric attribute represented by the first writing trajectory. The target geometric attribute includes a length parameter and an angle parameter. At least one.

After displaying the graphics, if it is monitored again that the touch operation is received in the canvas, and the touch operation includes a movement path, it is determined that the first writing operation is received, and the touch position of the first writing operation is obtained, and then the touch position Display the first writing track.

Specifically, when recognizing the first writing track, text recognition and symbol recognition are used. Among them, text recognition is used to recognize the numbers and characters contained in the first writing track, and the symbol recognition is used to determine the meaning of the symbols in the first writing track. Among them, the specific means of text recognition and symbol recognition are not limited in the embodiment. For example, by using machine learning, a large number of known target geometric attributes are trained in advance to obtain a numerical recognition model. At this time, the numerical recognition model can realize text recognition and symbol recognition. After that, the first writing trajectory is used as the input of the numerical recognition model, and the output of the numerical recognition model is determined as the data parameter represented by the first writing trajectory. Among them, the training method of the numerical recognition model can be set according to the actual situation. Optionally, in order to ensure the accuracy of the target geometric attributes, a corresponding numerical recognition model can be set for each type of graphics. For another example, the first writing trajectory is compared with preset trajectory templates of each data parameter, and the most similar trajectory template is selected as the data parameter represented by the first writing trajectory. Then, based on the data parameters, determine the feature type represented by the first writing trajectory, that is, whether the first writing trajectory is the geometric attribute of an edge, a corner or an axis, and then obtain the target geometric attribute represented by the first writing trajectory, where different features can be preset Type composition rules.

After obtaining the target geometric properties, look for the corresponding geometric features in the graph. When the graph is a circle type graph, you can directly mark the corresponding axis in the graph. If there are multiple axes, you can select the axis with the closest distance to the target geometric property to mark. Alternatively, the marking method of the axis is preset, for example, for a circle, a line segment whose radius and diameter are both in the vertical direction is preset, and then the vertical radius or diameter can be marked in the circle. When the figure is a polygon, the position data of each geometric feature in the canvas can be determined based on the position data of each vertex in the polygon, and then the geometric feature of the same kind closest to the target geometric attribute is selected as the corresponding geometric feature, for example, the target When the geometric attribute is a length parameter, the edge closest to the target geometric attribute is selected as the corresponding geometric feature, and when the target geometric attribute is an angle parameter, the angle closest to the target geometric attribute is selected as the corresponding geometric feature.

Step 330: Adjust the graphics according to the target geometric attributes, so that the target geometric attributes are used as the geometric attributes of the adjusted graphics.

Specifically, a unique graphic can be obtained according to the target geometric properties, and then the position of the graphic in the canvas is determined, and then the graphic is displayed on the canvas according to the position, and the original graphic in the canvas is deleted.

Wherein, when the graph is a circle type graph, each type of graph corresponds to a graph definite model, for example, a circle corresponds to a circle definite model, and an ellipse corresponds to an ellipse definite model. In the embodiment, the circle determination model is taken as an example. The circle determination model is a model obtained by training a large number of circles with different radius lengths and diameters and their different positions in the canvas through machine learning, and combines the target geometric attributes and The position of the edge of the circle in the current canvas is also used as the input of the circle determination model, and the position of the edge of the circle output by the circle determination model in the canvas is obtained. After that, draw the adjusted circle on the canvas based on the position. When the graphics are polygons, different types of graphics have different feature calculation formulas. When the target geometric properties are obtained, the parameters of the remaining geometric features in the graphics are calculated through the feature calculation formulas to obtain the unique graphics. Afterwards, the graphic deterministic model corresponding to this type of graphic is obtained, wherein each type of graphic corresponds to a type of graphic deterministic model. The graphics determination model is a model obtained by training the graphics with different geometric attributes and the different positions of the vertices of the graphics in the canvas through machine learning. When the parameters of the geometric characteristics of the graphics are determined, the parameters and the current canvas The position of the edge of the middle figure is used as the input of the figure determination model, and the position of each vertex of the figure determination model output in the canvas is obtained. After that, the adjusted figure is drawn on the canvas based on the vertex position.

As mentioned above, by displaying the figure in the canvas, and after receiving the first writing operation, displaying the first writing trajectory, the first writing trajectory is recognized to determine the target geometric attribute represented by the first writing trajectory, and then, according to the target geometry The technical solution of attribute adjustment graphics realizes the adjustment of the graphics displayed in the canvas by means of handwriting parameters, so that the adjusted graphics can better meet the expectations of users. At the same time, the accuracy of the graphics adjustment is high, which meets the user's adjustment expectations. At the same time, the operation process is simple and convenient, does not require high user proficiency, is convenient for users to realize, and improves user experience.

Example four

FIG. 19 is a flowchart of a graph adjustment method provided by Embodiment 4 of this application. This embodiment is embodied on the basis of the above-mentioned embodiment. Referring to FIG. 19, the graphics adjustment method provided by this embodiment specifically includes:

Step 401: Display graphics on the canvas.

Step 402: Receive a first writing operation, and obtain a first writing trajectory according to the first writing operation, and identify the first writing trajectory to determine the first data parameter and feature type represented by the first writing trajectory.

In practical applications, the user may input multiple target geometric attributes. Accordingly, in order to facilitate subsequent processing, the first writing trajectory corresponding to each target geometric attribute is determined as a group. Among them, the grouping mode can be set according to the actual situation. For example, when the writing time interval of the multiple first writing tracks is within the set interval and the distance between the multiple first writing tracks is within the set distance, then multiple writing tracks are determined. The first writing trajectory is a set of writing trajectories. At this time, it can be clear that the first writing track includes at least one group. Correspondingly, this step specifically includes: performing at least one of number recognition, symbol recognition, and character recognition on each group of first writing trajectories to determine the first data parameter and feature type represented by each group of first writing trajectories.

In the embodiment, number recognition, symbol recognition, and character recognition are taken as examples. Among them, text recognition refers to the recognition of letters. Specifically, the target geometric attributes include the first data parameter and the feature type. The first data parameter refers to the track content determined after recognizing the first writing track, and the track content includes numbers, symbols, and letters. Therefore, the first data parameter can be obtained through number recognition, symbol recognition, and character recognition.

Among them, the implementation means embodiments of number recognition, symbol recognition, and character recognition are not limited. For example, a numerical recognition model is constructed by means of machine learning, so as to obtain at least one of the numbers, symbols, and letters represented by the first writing trajectory through the numerical recognition model. For another example, standard writing trajectories corresponding to different numbers, symbols, and letters are preset, and then the first writing trajectory is matched with each standard writing trajectory to determine at least one of the numbers, symbols, and letters identified by the first writing trajectory. For example, referring to FIG. 8, the first data parameters obtained after recognizing the first writing track include: the number 45, the symbol °, and referring to FIG. 9, the first data parameters obtained after recognizing the first writing track include: the letter R, The number 3.

It is understandable that when the first data parameter is set with different content, the identification means also needs to be changed accordingly. For example, when the first data parameter contains only numbers, the identification means may only use number identification. For another example, when the first data parameter also includes Chinese characters, the character recognition should also include Chinese character recognition.

The feature type refers to the type of geometric feature corresponding to the first data parameter. Feature types include edges, corners, and shafts. When the feature type is axis, it specifically includes radius, diameter, short semi-axis, long semi-axis, etc. Optionally, pre-set the parameter composition rules for each feature type. For example, the parameter composition rules of edges are numbers, the parameter composition rules of angles are numbers and the symbol "°", and the parameter composition rules of axes are letters and numbers. , Set different letters to correspond to different axis types. For example, when the figure is a circle, R represents the radius and L represents the diameter. When the figure is an ellipse, R represents the minor axis, and L represents the major axis. At this point, the feature type can be obtained by combining the parameter combination rules. For example, in FIG. 8, the first writing track contains a number and a symbol "°". Therefore, it can be determined that the feature type is an angle. The geometric attributes of the target represented by the first written trajectory can be determined by the first data parameter and the feature type.

It is understandable that when the first writing trajectories are in multiple groups, after each group of first writing trajectories are obtained, each group of first writing trajectories can be identified separately. Alternatively, the first writing trajectory is monitored in real time, and when the writing of a group of first writing trajectories is confirmed, the first writing trajectory of the group is recognized. After confirming that the writing of the next set of first writing trajectories is completed, the next set of first writing trajectories are recognized.

Optionally, the first data parameter and the characteristic type may be determined at the same time, or the first data parameter may be determined first, and then the characteristic type may be determined, or the characteristic type may be determined first, and then the first data parameter may be determined. When the first data parameter and the feature type are determined at the same time, different recognition models are set for different types of graphics in advance. The recognition model adopts a machine learning method and is obtained after training a large number of first writing trajectories with known first data parameters and feature types. When the first data parameter is determined first, and then the feature type is determined, the first data parameter can be obtained by using the data recognition model to identify the first writing track, and then the first data parameter can be identified by the composition rule of the feature type. Determine the geometric characteristics of the first data parameter.

Step 403: Determine the geometric feature corresponding to the first data parameter in the graph according to the feature type. The geometric feature includes an edge, a corner, or an axis.

When the figure is a polygon, this step specifically includes: Steps 4031-4033:

Step 4031. Obtain all geometric features that meet the feature type in the graph.

When the figure is a polygon, the feature type of the first writing track is an edge or a corner. When the feature type is an edge, the position data of each edge in the graph in the canvas is obtained, that is, all geometric features satisfying the feature type as an edge are obtained in the graph. Wherein, the position data of each vertex in the graph in the canvas can be obtained in advance, and then the position data of the corresponding edge can be determined according to the position data of the vertex. When the feature type is an angle, the position data of each vertex in the graph is obtained, and the position data is used as the position data of the corresponding angle, that is, all geometric features satisfying the feature type as an angle are obtained in the graph. Optionally, the method for determining the vertex position data can be set according to actual conditions. For example, when performing pattern recognition on the second writing trajectory, the position data of the intersection of the trajectories are synchronously acquired as the position data of the vertex. For another example, when drawing a graph according to the graph template selection operation, the position data of the trajectory intersection point is synchronously determined as the position data of the vertex.

Step 4032. Acquire first position data of the first writing track.

When the first writing trajectory is displayed, the first position data of the first writing trajectory has already been obtained. Therefore, the first position data can be directly obtained in this step.

Step 4033: Among all geometric features satisfying the feature type, search for the geometric feature closest to the first position data, and use the found geometric feature as the geometric feature corresponding to the first data parameter.

Taking the feature type as an example of an edge, the location data of each edge in the graph is compared with the first location data to determine the edge closest to the first location data, and the edge is taken as the edge corresponding to the first data parameter. Wherein, the method of comparing the position data of each side with the first position data may be: determining the minimum area of the first position data (the smallest rectangular area containing the first position data), and at the same time, determining the minimum area of each side (The smallest rectangular area containing the side), then, calculate the distance between the center points of the two smallest areas, and take the side corresponding to the smallest distance as the closest geometric feature of the first position data.

For example, FIG. 20 is a schematic diagram of the sixteenth interface of the canvas provided by an embodiment of the application. The graphics in the canvas are triangles. Among them, the three sides of the triangle correspond to the minimum area 41, the minimum area 42, and the minimum area 43, respectively. The first position data of the first writing track corresponds to the minimum area 44. At this time, the center point of the minimum area 44 and the minimum area 41 are respectively calculated. , The minimum area 42 and the distance between the center points of the minimum area 43, after which the minimum area 42 is determined to be the closest to the minimum area 44. At this time, the edge corresponding to the minimum area 42 is taken as the geometry corresponding to the target geometric attribute represented by the first writing trajectory feature. It can be understood that the minimum area shown in the figure is only easy to understand, and the minimum area will not be displayed in actual applications.

Taking the angle as an example, the position data of each vertex in the graph is compared with the first position data to determine the vertex closest to the first position data, and the angle corresponding to the vertex is taken as the angle corresponding to the first data parameter. Wherein, the method of comparing the position data of the vertex with the first position data may be to obtain any coordinate position in the vertex, calculate the distance between the coordinate position and the minimum area center point of the first position data, and take the angle corresponding to the minimum distance, and The side corresponding to the angle is regarded as the closest angle of the first position data.

When the figure is a circle type figure, step 403 is specifically: selecting a corresponding geometric feature in the figure according to the feature type as the geometric feature corresponding to the first data parameter in the figure.

When the figure is a circle type figure, the geometric feature is usually an axis. For example, when the graphic is a circle and the feature type is a radius, any radius of the circle or a set radius (such as the radius on the right in the horizontal direction) can be directly obtained as the radius corresponding to the first data parameter. When the graph is an ellipse and the feature type is the short semi-axis, you can directly obtain the set short semi-axis, any short semi-axis, or the short semi-axis closest to the first data parameter as the short semi-axis corresponding to the first data parameter in the ellipse. Half shaft.

Step 404: Establish an association relationship between the target geometric attribute and the corresponding geometric feature in the graph, and mark the geometric feature.

After the geometric features corresponding to the target geometric attributes are determined, an association relationship between the target geometric attributes and the geometric features is established, for example, the same identification is added for the target geometric attributes and the geometric features. At the same time, add corresponding marks to the graphics to remind users that the target geometric attributes and geometric features have established an association relationship.

Step 405: Determine whether the target geometric attribute meets the graphics unique determination condition of the graphics, and each type of graphics corresponds to the unique determination condition of one type of graphics. If the target geometric attribute meets the condition for determining the uniqueness of the figure, step 406 is executed. If the target geometric attribute does not satisfy the condition for determining the uniqueness of the figure, step 407 is executed.

Specifically, each type of graphics is provided with graphics unique determination conditions. After the type of graphics is identified, the corresponding graphics unique determination conditions can be obtained, and then it is determined whether the target geometric attributes meet the graphics unique determination conditions.

When the figure is a polygon, all target geometric attributes of the figure are obtained, and then it is determined whether the geometric features corresponding to all the target geometric attributes meet the conditions for determining the uniqueness of the figure. For example, when the figure is a triangle, determine that the geometric features corresponding to the target geometric attributes are one side and two corners, and confirm that the position relationship between the above geometric features is that the side is located between the two corners. The graphics unique determination condition is compared to confirm whether the position relationship is consistent with the position relationship in the graphics unique determination condition. If so, it is determined that the graphics unique determination condition is satisfied; otherwise, it is determined that the graphics unique determination condition is not satisfied. Among them, the position relationship can be determined by the position data of each geometric feature in the canvas. For another example, when the figure is a rectangle, determine that the geometric features corresponding to the target geometric properties are the two sides in the rectangle, and confirm that the positional relationship between the two sides is adjacent, and then compare with the positional relationship in the unique determination condition of the figure. Yes, to confirm whether the positional relationship is consistent with the positional relationship in the graphics unique determination condition.

When the figure is a round figure, after obtaining the target geometric attributes of the figure, determine whether the characteristic type of the target geometric attribute is consistent with the characteristic type in the figure's unique determination condition. If it is, it is determined that the figure's unique determination condition is satisfied; otherwise, it is determined that the characteristic type is not satisfied. The graphics uniquely determine the conditions. For example, when the graphic is circular, the feature type of the target geometric attribute is radius, which is consistent with the feature type (radius or diameter) in the unique determination condition of the circular graphic. Therefore, it is determined that the unique determination condition of the graphic is satisfied. For another example, when the figure is an ellipse, the feature type of the target geometric attribute is the semi-minor axis, which is inconsistent with the feature type (the semi-minor axis and the semi-major axis, or the minor axis or the major axis) that uniquely determines the condition of the ellipse. , It is determined that the unique determination condition of the graph is not satisfied.

Step 406: Adjust the graphics according to the target geometric attributes.

When the figure is a polygon, this step includes steps 4061 to 4062:

Step 4061: Determine the second position data of all vertices in the graph according to the target geometric attributes.

Specifically, when drawing a graph, it is necessary to determine the position data of each vertex in the adjusted graph in the canvas, and record it as the second position data. After that, the corresponding vertices are sequentially connected based on the second position data to obtain the adjusted graphics. Accordingly, setting this step includes 40611-step 40613:

Step 40611: Retrieve the feature calculation formula of the graph.

Specifically, each type of graph has a corresponding characteristic calculation formula. For example, the characteristic calculation formula of a triangle includes the Pythagorean theorem, the law of sine, and the law of cosine. For another example, the characteristic calculation formula of a square is that the side lengths are equal, and each internal angle is 90°. When it is determined that the geometric properties of the target meet the unique determination condition of the figure, the characteristic calculation formula corresponding to the figure is called.

It is understandable that before calling the feature calculation formula of the graph, you can first determine whether you need to call the feature calculation formula, that is, first determine whether the length parameters of each side have been clarified, if so, you do not need to call the feature calculation formula, and directly Whether the length parameter of each side meets the side length condition in the graph, for example, the side length condition of a triangle is that the sum of any two sides is greater than the third side, and the difference between any two sides is less than the third side. If it is satisfied, perform step 40613, otherwise, call the corresponding feature calculation formula.

Step 40612: Substitute the target geometric attributes into the feature calculation formula to calculate the second data parameter of each edge in the graph.

Specifically, after substituting the target geometric attributes into the feature calculation formula, the second data parameter of each side in the graph can be obtained, where the second data parameter represents the length parameter of the corresponding side. It is understandable that in some cases, multiple feature calculation formulas are required to obtain the second data parameter of each edge in the graph. At this time, the sequence of substituting each feature calculation formula can be determined, where the substituting sequence can be set according to actual conditions, for example, the fastest obtaining of the second data parameter of each side as a criterion determines the substituting sequence.

It is understandable that if the second data parameter of each side cannot be obtained according to the feature calculation formula, it is determined that the adjustment has failed, and step 407 is executed.

Step 40613: Determine the second position data of the vertex according to the second data parameter.

Specifically, the position of each vertex in the adjusted graph on the canvas is recorded as the second position data. Optionally, the second position data is obtained through the graphic determination model. Specifically, the second data parameters and the position data of the current vertices of the graphic are used as the input of the graphic determination model, and the position data output by the graphic data model is recorded as the adjusted graphic The second position data of each vertex. Optionally, the position data of a vertex in the current graph is used as the adjusted second position data of the vertex, and then the second position data of the remaining vertices are determined based on the second data parameter.

Step 4062, display the adjusted graph according to the second position data.

Specifically, after the vertices are sequentially connected, the position data of each edge after adjustment can be obtained, and then a new graph is drawn on the canvas as the adjusted graph according to the position data of each edge. At the same time, delete the original graphics in the canvas.

When the graphic is a circle-like graphic, you can directly use the center point of the current graphic as the center of the circle, and determine the position data of the edge according to the target geometric properties, or obtain the position data of the edge of the circle in the canvas according to the graphic determination model. After that, a new figure is drawn on the canvas according to the position data as the adjusted figure. At the same time, delete the original graphics in the canvas.

Optionally, the first writing track is reshaped and displayed in the adjusted graph. Among them, the embodiment of the shaping means is not limited. Pre-set the relative position relationship between the target geometric attributes and the graphics, and after shaping, display the target geometric attributes in the graphics according to the relative position relationship.

Step 407: Confirm and execute the subsequent execution plan.

Specifically, an execution plan can be set and executed as a follow-up execution plan according to the actual situation. In the embodiment, the subsequent execution plan includes any of the following execution plans:

Solution 1: Display the adjustment failure prompt.

When it is determined that the graphics cannot be adjusted, the adjustment failure prompt is triggered, and the preset prompt box display content and display position are called. After that, the control display screen displays the prompt box according to the display content and display position to prompt the user that the adjustment has failed. At this point, it can continue to detect whether the first writing operation is received, and after receiving the first writing operation, continue to perform the above operations, and confirm whether the graphics can be adjusted.

Solution 2: Find the geometric features corresponding to the target geometric attributes in the graphics, determine the actual geometric attributes of the geometric features, determine the modification range according to the target geometric attributes and the actual geometric attributes, and adjust the graphics according to the modification range.

Taking a rectangle as an example, there is only one target geometric attribute, its characteristic type is edge, and the first data parameter is 5. At this time, it is determined that the geometric properties of the target do not satisfy the condition for determining the uniqueness of the figure, and the actual geometric properties of the edges corresponding to the geometric properties of the target in the rectangle are obtained. The actual geometric property is 4. At this time, the modification range is determined to be 5/4. Then, find an adjacent side of the side corresponding to the target geometric property in the rectangle, and confirm that the actual geometric property of the adjacent side is 8. At this time, the result of 8*5/4 is used as the adjusted geometric property of the adjacent side . Afterwards, the graphics are adjusted according to the target geometric attributes and the adjusted geometric attributes. It can be understood that at this time, the adjustment method is the same as the adjustment method when the unique determination condition of the graph is satisfied. I won't repeat them here.

Taking an ellipse as an example, there is only one target geometric attribute, and its feature type is semi-short axis, and the first data parameter is 5. At this time, it is determined that the geometric properties of the target do not satisfy the condition for determining the uniqueness of the figure, and the actual geometric properties of the minor semi-axis corresponding to the geometric properties of the target in the ellipse are obtained. The actual geometric property is 4. At this time, the modification range is determined to be 5/4. Then, search for any semi-major axis in the ellipse, and confirm that the actual geometric attribute of the semi-major axis is 8. At this time, the result of 8*5/4 is used as the geometric attribute of the semi-major axis after adjustment. Afterwards, the graphics are adjusted according to the target geometric attributes and the adjusted geometric attributes. It can be understood that at this time, the adjustment method is the same as the adjustment method when the unique determination condition of the graph is satisfied. I won't repeat them here.

It can be understood that when there are multiple target geometric attributes, any one of the target geometric attributes and the corresponding actual geometric attributes can be selected to obtain the modification range. Optionally, at this time, other target geometric attributes can be modified according to the actual geometric attributes corresponding to their geometric features to ensure that graphics can be obtained.

Solution 3: Find the corresponding geometric features in the graphics according to the unique determination conditions of the graphics, determine the actual geometric attributes of the geometric features, and adjust the graphics according to the target geometric attributes and the actual geometric attributes.

Taking a rectangle as an example, there is only one target geometric attribute, its characteristic type is edge, and the first data parameter is 5. At this time, it is determined that the geometric properties of the target do not satisfy the condition for determining the uniqueness of the figure, and the actual geometric properties of the edges corresponding to the geometric properties of the target in the rectangle are obtained. According to the unique determination condition of the figure, find an adjacent side of the corresponding side of the target geometric property in the rectangle, and confirm that the actual geometric property of the adjacent side is 8. At this time, according to the target geometric property 5 and the actual geometric property of the adjacent side 8. The graphics are adjusted. It can be understood that at this time, the adjustment method is the same as the adjustment method when the unique determination condition of the graph is satisfied. I won't repeat them here.

Take the triangle as an example, there are two target geometric attributes, and the feature types of the two target geometric attributes are edges, and the first data parameter is 5. At this time, it is determined that the geometric attributes of the target do not satisfy the conditions for determining the uniqueness of the figure, and the angle between the two edges corresponding to the geometric attributes of the target is obtained according to the conditions for determining the uniqueness of the graphics. The actual geometric properties of the determined angle are 70°. At this time, adjust the graphics according to the length parameter of the two sides and the angle parameter of the angle between the two sides. It can be understood that at this time, the adjustment method is the same as the adjustment method when the unique determination condition of the graph is satisfied. I won't repeat them here.

It can be understood that, in actual applications, other solutions may also be adopted for subsequent execution solutions, which are not limited in the embodiment.

As mentioned above, by displaying the graphics in the canvas and displaying the first writing track according to the received first writing operation, after that, the first writing track is recognized to obtain the first data parameter and the characteristic type, and then the first writing track is determined according to the characteristic type. The first data parameter corresponds to the geometric feature in the graph, and establishes the association relationship between the target geometric property and the corresponding geometric feature. After that, when the target geometric property is confirmed to meet the unique determination condition of the graph, the graph is adjusted according to the target geometric property, and the target geometry is confirmed When the attribute does not meet the condition of the unique determination of the graphic, the technical solution of adjusting the graphic with an adjustment failure prompt or combining the actual geometric attributes of the graphic, realizes the adjustment of the graphic displayed in the canvas by handwriting parameters, and the accuracy of graphic adjustment is high . At the same time, when the graph is a polygon, the geometric feature corresponding to the target geometric property can be accurately determined through the positional relationship between each geometric feature and the target geometric property, and the data parameters of the edge in the graph can be quickly and accurately obtained through the pre-stored feature calculation formula, and then accurately obtained The position data of each vertex after adjustment ensures the accuracy of graphics adjustment.

It can be understood that, since the application scenarios of the third and fourth embodiments are the same as those of the first and second embodiments, for technical details not described in this embodiment, please refer to the above-mentioned embodiments.

Example five

FIG. 21 is a schematic structural diagram of a graphic adjustment device provided in Embodiment 5 of the application. Referring to FIG. 21, the graphic adjustment device includes: a first display module 501, a second display module 502, and a first adjustment module 503.

Among them, the first display module 501 is used to display graphics in the canvas; the second display module 502 is used to display a first writing trajectory in response to the received first writing operation, and the first writing trajectory represents the geometric attributes of the target The target geometric attribute includes at least one of a length parameter and an angle parameter; the first adjustment module 503 is configured to adjust the graphic so that the target geometric attribute is used as the geometric attribute of the adjusted graphic.

On the basis of the above-mentioned embodiment, it further includes: a feature marking module, which is used to respond to the received first writing operation, after displaying the first writing trajectory, and based on the target geometric attributes, to compare the corresponding geometric features in the figure Marking is performed, the geometric features include edges, corners, or axes, and each target geometric attribute corresponds to one geometric feature.

On the basis of the foregoing embodiment, the feature marking module is specifically configured to: when the geometric feature corresponding to the target geometric attribute is an edge, change the display parameter of the geometric feature; the geometric feature corresponding to the target geometric attribute is an angle or axis At the time, the mark of the geometric feature is added to the graphic.

On the basis of the foregoing embodiment, the fourth display module is configured to display an adjustment failure prompt when it is confirmed that the target geometric attribute does not satisfy the condition for determining the uniqueness of the figure after displaying the first writing trajectory in response to the received first writing operation .

On the basis of the foregoing embodiment, the first display module 501 is specifically configured to: in response to the received second writing operation, display a second writing trajectory in the canvas, the second writing trajectory composing a graph; or, in response to receiving The graphic template selection operation that has been obtained, the graphic corresponding to the graphic template selection operation is displayed on the canvas.

On the basis of the foregoing embodiment, the first adjustment module 503 is further configured to: display the reshaped first writing trajectory, and the reshaped first writing trajectory is a computer drawing element.

The graphic adjustment device provided above can be used to implement the graphic adjustment method provided in any one of the foregoing embodiment 1 to embodiment 2, and has corresponding functions and beneficial effects.

At the same time, the fifth embodiment of the present application also provides another graphic adjustment device. At this time, FIG. 22 is a schematic structural diagram of another graphic adjustment device provided by the fifth embodiment of the present application. Referring to FIG. 22, the graphic adjustment device includes: a third display module 504, an operation receiving module 505, and a second adjustment module 506.

Among them, the third display module 504 is used to display graphics in the canvas; the operation receiving module 505 is used to receive a first writing operation, and obtain a first writing track according to the first writing operation, and to compare the first writing track Recognition is performed to determine the target geometric attribute represented by the first writing track, the target geometric attribute includes at least one of a length parameter and an angle parameter; the second adjustment module 506 is configured to adjust the figure according to the target geometric attribute , So that the target geometric attribute is used as the geometric attribute of the adjusted figure.

On the basis of the foregoing embodiment, the operation receiving module 505 includes: a trajectory determining unit for receiving a first writing operation, and obtaining the first writing trajectory according to the first writing operation, and a parameter determining unit for evaluating the first writing operation. A writing track is identified to determine the first data parameter and feature type represented by the first writing track; the feature confirmation unit is configured to determine the corresponding first data parameter in the graph according to the feature type Geometric features, the geometric features include edges, corners or shafts.

On the basis of the foregoing embodiment, the first writing trajectory includes at least one group; the parameter determining unit specifically includes: performing at least one of number recognition, symbol recognition, and character recognition on each group of the first writing trajectory to determine each group Set the first data parameter and feature type represented by the first writing track.

On the basis of the foregoing embodiment, the graphic is a polygon, and the feature confirmation unit includes: a feature acquisition subunit for acquiring all geometric features in the graphic that meet the feature type; a position acquisition subunit for acquiring the first A first position data of a writing track; a feature search subunit, used to search for the geometric feature closest to the first position data among all geometric features that satisfy the feature type, and use the found geometric feature as the all geometric features The geometric feature corresponding to the first data parameter.

On the basis of the above-mentioned embodiment, the relationship establishment module is used to identify the first writing trajectory to determine the target geometric attribute represented by the first writing trajectory, and then establish the target geometric attribute and the figure. Corresponding to the association relationship of the geometric features, and marking the geometric features.

On the basis of the foregoing embodiment, the second adjustment module 506 is specifically configured to adjust the graphics according to the target geometric attributes if the target geometric attributes meet the conditions for determining the uniqueness of the graphics, so that the target geometric attributes serve as The geometric properties of the adjusted figure.

On the basis of the foregoing embodiment, it further includes: a failure execution module, configured to display an adjustment failure prompt if the target geometric attribute does not meet the condition for determining the uniqueness of the figure; or, if the target geometric attribute does not meet the If the figure is uniquely determined, the geometric feature corresponding to the target geometric attribute is searched in the figure, the actual geometric attribute of the geometric feature is determined, the modification range is determined according to the target geometric attribute and the actual geometric attribute, and according to The modification range adjusts the graphic; or, if the target geometric attribute does not satisfy the unique determination condition of the graphic, the corresponding geometric feature is searched in the graphic according to the unique determination condition of the graphic, and the geometric feature is determined And adjust the graphics according to the target geometric properties and the actual geometric properties.

On the basis of the foregoing embodiment, the graphic is a polygon, and the second adjustment module 506 includes: a vertex determining unit, configured to determine the second position data of all vertices in the graphic according to the target geometric attributes; and a graphic display unit, configured to The adjusted graph is displayed according to the second position data.

On the basis of the foregoing embodiment, the vertex determination unit includes: a formula calling subunit for calling a feature calculation formula of the graph; a formula calculation subunit for substituting the target geometric attribute into the feature calculation formula , To calculate the second data parameter of each edge in the graph; the position determining subunit is used to determine the second position data of the vertex according to the second data parameter.

On the basis of the above-mentioned embodiment, the third display module 504 includes: a writing receiving unit for receiving a second writing operation, and displaying the second writing track according to the second writing operation; The second writing trajectory performs pattern recognition to determine the figure represented by the second writing trajectory.

The graphics adjustment device provided above can be used to execute the graphics adjustment method provided in any one of the third and fourth embodiments above, and has corresponding functions and beneficial effects.

It is worth noting that, in the above embodiment of the graphics adjustment device, the various units and modules included are only divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be realized; in addition, each The specific names of the functional units are only for the convenience of distinguishing each other, and are not used to limit the protection scope of the present application.

Example Six

FIG. 23 is a schematic structural diagram of a graphics adjustment device provided in Embodiment 6 of this application. In this embodiment, the description is made by taking the smart interactive tablet as the graphics adjustment device as an example. As shown in FIG. 23, the smart interactive tablet 60 includes at least one processor 61, at least one network interface 62, a user interface 63, a memory 64, and at least one communication bus 65.

Among them, the communication bus 65 is used to realize the connection and communication between these components.

The user interface 62 may include a display screen and a camera, and the optional user interface 63 may also include a standard wired interface and a wireless interface.

Among them, the network interface 62 may optionally include a standard wired interface and a wireless interface (such as a Wi-Fi interface).

The processor 61 may include one or more processing cores. The processor 61 uses various interfaces and lines to connect the various parts of the entire intelligent interactive tablet 60, by running or executing instructions, programs, code sets, or instruction sets stored in the processor 61, and calling data stored in the memory 64 , Perform various functions of the smart interactive tablet 60 and process data. Optionally, the processor 61 may adopt at least one of digital signal processing (Digital Signal Processing, DSP), Field-Programmable Gate Array (Field-Programmable Gate Array, FPGA), and Programmable Logic Array (Programmable logic arrays, PLA). A kind of hardware form to realize. The processor 61 may integrate one or a combination of a central processing unit (CPU), a graphics processing unit (GPU), a modem, and the like. Among them, the CPU mainly processes the operating system, user interface, and application programs; the GPU is used to render and draw the content that needs to be displayed on the display; the modem is used to process wireless communication. It is understandable that the above-mentioned modem may not be integrated into the processor 61, but may be implemented by a chip alone.

The memory 64 may include random access memory (RAM) or read-only memory (Read-Only Memory). Optionally, the memory 64 includes a non-transitory computer-readable storage medium. The memory 64 may be used to store instructions, programs, codes, code sets, or instruction sets. The memory 64 may include a program storage area and a data storage area, where the program storage area may store instructions for implementing the operating system and instructions for at least one function (such as touch function, sound playback function, image playback function, etc.), Instructions used to implement the foregoing method embodiments, etc.; the storage data area can store the data involved in the foregoing method embodiments, etc. Optionally, the memory 64 may also be at least one storage device located far away from the aforementioned processor 61. As shown in FIG. 23, the memory 64 as a computer storage medium may include an operating system, a network communication module, a user interface module, and an operating application program of a smart interactive tablet.

In the smart interactive tablet 60 shown in FIG. 23, the user interface 63 is mainly used to provide an input interface for the user to obtain data input by the user; and the processor 61 can be used to call the operation application of the smart interactive tablet stored in the memory 64 Program, and specifically execute the relevant operations in the element control method in the above embodiment.

In one embodiment, the operating system of the smart interactive tablet is Android.

The above-mentioned smart interactive tablet can be used to execute any graphics adjustment method, and has corresponding functions and beneficial effects.

In addition, an embodiment of the present application also provides a storage medium containing computer-executable instructions, which are used to perform related operations in the graphics adjustment method provided by any embodiment of the present application when the computer-executable instructions are executed by a computer processor. , And have corresponding functions and beneficial effects.

Those skilled in the art should understand that the embodiments of the present application can be provided as methods, systems, or computer program products.

Therefore, this application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, this application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes. This application is described with reference to flowcharts and/or block diagrams of methods, equipment (systems), and computer program products according to the embodiments of this application. It should be understood that each process and/or block in the flowchart and/or block diagram, and the combination of processes and/or blocks in the flowchart and/or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing equipment to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing equipment are generated It is a device that realizes the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram. These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device. The device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram. These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment. The instructions provide steps for implementing the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

In a typical configuration, the computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory. The memory may include non-permanent memory in a computer readable medium, and at least one form of random access memory (RAM) and non-volatile memory, such as read-only memory (ROM) or flash memory (flash RAM). The memory is an example of a computer-readable medium.

Computer-readable media include permanent and non-permanent, removable and non-removable media, and information storage can be realized by any method or technology. The information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, CD-ROM, digital versatile disc (DVD) or other optical storage, Magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media can be used to store information that can be accessed by computing devices. According to the definition in this article, computer-readable media does not include transitory media, such as modulated data signals and carrier waves.

It should also be noted that the terms "include", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or equipment including a series of elements not only includes those elements, but also includes Other elements that are not explicitly listed, or they also include elements inherent to such processes, methods, commodities, or equipment. If there are no more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other identical elements in the process, method, commodity, or equipment that includes the element.

Claims

A graphic adjustment method, including:

Display graphics in the canvas;

In response to the received first writing operation, displaying a first writing trajectory, the first writing trajectory representing a target geometric attribute, and the target geometric attribute includes at least one of a length parameter and an angle parameter;

The graphic is adjusted so that the target geometric attribute is the geometric attribute of the adjusted graphic.
The graphic adjustment method according to claim 1, wherein the step of displaying the first writing track in response to the received first writing operation comprises:

Based on the target geometric attributes, mark corresponding geometric features in the graphics. The geometric features include edges, corners, or axes, and each target geometric attribute corresponds to one geometric feature.
The graphic adjustment method according to claim 2, wherein the marking corresponding geometric features in the graphic comprises:

When the geometric feature corresponding to the target geometric attribute is an edge, the display parameter of the geometric feature is changed;

When the geometric feature corresponding to the target geometric attribute is a corner or an axis, a mark of the geometric feature is added to the graphic.
The graphic adjustment method according to claim 1, wherein, after displaying the first writing trajectory in response to the received first writing operation, the method further comprises:

When it is confirmed that the geometric properties of the target do not meet the conditions for determining the uniqueness of the figure, an adjustment failure prompt is displayed.
The graphic adjustment method according to claim 1, wherein said displaying the graphic in the canvas comprises:

In response to the received second writing operation, display a second writing track on the canvas, the second writing track composing a graph; or,

In response to the received graphic template selection operation, a graphic corresponding to the graphic template selection operation is displayed on the canvas.
The graphic adjustment method according to claim 1, wherein the adjusting the graphic so that the target geometric attribute is used as the geometric attribute of the adjusted graphic, further comprising:

The reshaped first writing trajectory is displayed, and the reshaped first writing trajectory is a computer drawing element.
A graphic adjustment method, including:

Display graphics in the canvas;

A first writing operation is received, and a first writing trajectory is obtained according to the first writing operation, and the first writing trajectory is recognized to determine a target geometric attribute represented by the first writing trajectory, and the target geometric attribute includes At least one of length parameter and angle parameter;

The graphic is adjusted according to the target geometric attribute, so that the target geometric attribute is used as the geometric attribute of the adjusted graphic.
8. The graphic adjustment method according to claim 7, wherein said recognizing said first writing trajectory to determine the target geometric attribute represented by said first writing trajectory comprises:

Identifying the first writing trajectory to determine the first data parameter and feature type represented by the first writing trajectory;

According to the feature type, a geometric feature corresponding to the first data parameter in the graph is determined, and the geometric feature includes an edge, a corner, or an axis.
8. The graphic adjustment method according to claim 8, wherein the first writing track includes at least one group;

The recognizing the first writing trajectory to determine the first data parameter and characteristic type represented by the first writing trajectory includes:

At least one of number recognition, symbol recognition, and character recognition is performed on each group of the first writing trajectories to determine the first data parameter and feature type represented by each group of the first writing trajectory.
8. The graphic adjustment method according to claim 8, wherein the graphic is a polygon;

The determining, according to the feature type, the geometric feature corresponding to the first data parameter in the graph includes:

Acquiring all geometric features in the graph that meet the feature type;

Acquiring first position data of the first writing track;

Among all geometric features satisfying the feature type, the geometric feature closest to the first position data is searched, and the found geometric feature is used as the geometric feature corresponding to the first data parameter.
The graphic adjustment method according to any one of claims 7-10, wherein after the recognizing the first writing trajectory to determine the target geometric attribute represented by the first writing trajectory, the method comprises:

Establish an association relationship between the target geometric attribute and the corresponding geometric feature in the graph, and mark the geometric feature.
8. The graphic adjustment method according to claim 7, wherein said adjusting said graphic according to said target geometric attribute comprises:

If the target geometric attribute satisfies the unique determination condition of the figure, the figure is adjusted according to the target geometric attribute.
The graphics adjustment method according to claim 12, further comprising:

If the target geometric attributes do not meet the conditions for the unique determination of the figure, a prompt of adjustment failure is displayed; or,

If the target geometric attribute does not satisfy the unique determination condition of the figure, the geometric characteristic corresponding to the target geometric attribute is searched in the figure, the actual geometric attribute of the geometric characteristic is determined, and the target geometric attribute and the geometric characteristic are determined. The actual geometric attributes determine the modification range, and adjust the graphics according to the modification range; or,

If the target geometric attribute does not meet the unique determination condition of the figure, the corresponding geometric feature is searched in the figure according to the unique determination condition of the figure, the actual geometric attribute of the geometric feature is determined, and the target geometry The attributes and the actual geometric attributes adjust the graphics.
8. The graphic adjustment method according to claim 7, wherein the graphic is a polygon;

The adjusting the graphics according to the target geometric attributes includes:

Determining the second position data of all vertices in the graph according to the target geometric attributes;

The adjusted graph is displayed according to the second position data.
The graphic adjustment method according to claim 14, wherein the determining the second position data of all vertices in the graphic according to the target geometric attributes comprises:

Retrieve the characteristic calculation formula of the graph;

Substituting the target geometric attribute into the feature calculation formula to calculate the second data parameter of each edge in the graph;

The second position data of the vertex is determined according to the second data parameter.
8. The graphic adjustment method according to claim 7, wherein said displaying the graphic in the canvas comprises:

Receiving a second writing operation, and displaying a second writing track according to the second writing operation;

Graphic recognition is performed on the second writing trajectory to determine the graphic represented by the second writing trajectory.
A graphic adjustment device, including:

The first display module is used to display graphics in the canvas;

The second display module is configured to display a first writing trajectory in response to the received first writing operation, the first writing trajectory representing a target geometric attribute, and the target geometric attribute includes at least one of a length parameter and an angle parameter;

The first adjustment module is configured to adjust the graphics so that the target geometric attributes are used as the geometric attributes of the adjusted graphics.
A graphic adjustment device, including:

The third display module is used to display graphics on the canvas;

The operation receiving module is configured to receive a first writing operation, obtain a first writing trajectory according to the first writing operation, and identify the first writing trajectory to determine the target geometric attribute represented by the first writing trajectory, The target geometric attribute includes at least one of a length parameter and an angle parameter;

The second adjustment module is configured to adjust the graphics according to the target geometric attributes, so that the target geometric attributes are used as the geometric attributes of the adjusted graphics.
A graphics adjustment device, including:

One or more processors;

Memory, used to store one or more programs;

When the one or more programs are executed by the one or more processors, the one or more processors implement the graphics adjustment method according to any one of claims 1-6 or 7-16 .
A computer-readable storage medium with a computer program stored thereon, wherein the program is executed by a processor to implement the graphics adjustment method according to any one of claims 1-6 or 7-16.