CN113934315A - Display method based on electronic board, electronic board and computer storage medium - Google Patents
Display method based on electronic board, electronic board and computer storage medium Download PDFInfo
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- CN113934315A CN113934315A CN202010667934.6A CN202010667934A CN113934315A CN 113934315 A CN113934315 A CN 113934315A CN 202010667934 A CN202010667934 A CN 202010667934A CN 113934315 A CN113934315 A CN 113934315A
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- erasing
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
- G06F3/0488—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B5/00—Electrically-operated educational appliances
- G09B5/02—Electrically-operated educational appliances with visual presentation of the material to be studied, e.g. using film strip
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/048—Indexing scheme relating to G06F3/048
- G06F2203/04804—Transparency, e.g. transparent or translucent windows
Abstract
The application is applicable to the technical field of electronics, and provides a display method based on an electronic board, the electronic board and a computer storage medium, wherein the display method based on the electronic board comprises the following steps: when the erasing operation is detected, determining an erasing area corresponding to the erasing operation; if target pixel points with color values different from color values corresponding to the colors of the board surface of the electronic board exist in the erasing area, dynamically displaying a plurality of preset graphs in a target display area corresponding to the erasing area; the target display area is arranged between the erasing area and the lower frame of the board surface; the color value of each pixel point forming the preset graph is the same as that of the target pixel point. The display method based on the electronic board can simulate the chalk dust falling process corresponding to the erasing operation based on the blackboard, so that the reality degree of the erasing operation based on the electronic board to the simulation of the erasing operation based on the traditional blackboard is improved.
Description
Technical Field
The present application relates to the field of electronic technologies, and in particular, to a display method based on an electronic board, and a computer-readable storage medium.
Background
With the continuous development of intelligent education products, teaching aids gradually tend to be electronized, wherein a conventional blackboard is gradually replaced by an electronic board for teaching. In the teaching using the electronic board, a finger or a stylus pen may be generally used to write contents on the electronic board, and the written contents are erased by an erasing operation. Since the operations performed on the electronic board are all electronized operations, the writing operation and the erasing operation performed on the electronic board can be simulated as the writing operation and the erasing operation performed on the blackboard.
However, since the content on the blackboard is usually written with chalk, the chalk dust usually falls off when the erasing operation is performed on the blackboard, and the existing erasing operation based on the electronic board does not generate dust, and thus, the reality of the simulation of the erasing operation based on the electronic board on the blackboard is low.
Disclosure of Invention
The embodiment of the application provides a display method based on an electronic board, the electronic board and a computer readable storage medium, which can solve the problem that the existing erasing operation based on the electronic board has low fidelity to the simulation of the erasing operation based on a blackboard.
In a first aspect, an embodiment of the present application provides a display method based on an electronic board, including:
when an erasing operation is detected, determining an erasing area corresponding to the erasing operation;
if a target pixel point with a color value different from the color value corresponding to the color of the panel surface of the electronic board exists in the erasing area, dynamically displaying a plurality of preset graphs in a target display area corresponding to the erasing area; the target display area is arranged between the erasing area and the lower frame of the board surface; and the color value of each pixel point forming the preset graph is the same as that of the target pixel point.
Further, when an erase operation is detected, determining an erase area corresponding to the erase operation includes:
when the touch point with the area larger than or equal to the preset area threshold value exists on the board surface of the electronic board, the erasing operation is determined to be detected, and the touch area occupied by the touch point is determined to be the erasing area.
Further, the erasing area is a rectangular area; the target display area is an area which is not overlapped with the erasing area in a projection area formed by a first diagonal line of the erasing area and the projection of the first diagonal line on the lower frame; the first diagonal line is a diagonal line, of two diagonal lines of the erasing area, which has a longer projection length on the lower frame.
Further, the dynamically displaying a plurality of preset graphics in the target display area corresponding to the erasing area includes:
displaying a group of preset graphs at different positions of the target display area at preset time intervals until the group of preset graphs displayed currently meet preset requirements; the display duration of each group of preset graphs is the preset time interval, and the first distance between each preset graph in the group of preset graphs and the lower frame displayed later is smaller than the second distance between the corresponding preset graph in the group of preset graphs and the lower frame displayed earlier.
Further, the transparency of each preset graph in the group of preset graphs displayed later is greater than the transparency of each preset graph in the group of preset graphs displayed earlier.
Further, displaying a group of preset graphics at different positions of the target display area at preset time intervals until the currently displayed group of preset graphics meets preset requirements, including:
displaying a group of preset graphs at different positions of the target display area at preset time intervals until the transparency of each preset graph in the group of preset graphs which are displayed currently is larger than a preset transparency threshold;
or displaying a group of preset graphs at different positions of the target display area at preset time intervals until the minimum value of a third distance between each preset graph in the group of preset graphs and the lower frame which are currently displayed is smaller than a preset distance threshold.
Further, the displaying a set of preset graphics at different positions of the target display area at preset time intervals includes:
and determining a group of circular display areas at different positions of the target display area at preset time intervals, and adjusting the color values of part of the pixels corresponding to each circular display area to the color values of the target pixels.
In a second aspect, an embodiment of the present application provides an electronic board, including:
the device comprises a determining unit, a judging unit and a judging unit, wherein the determining unit is used for determining an erasing area corresponding to an erasing operation when the erasing operation is detected;
the display unit is used for dynamically displaying a plurality of preset graphs in a target display area corresponding to the erasing area if a target pixel point with a color value different from a color value corresponding to the color of the board surface of the electronic board exists in the erasing area; the target display area is arranged between the erasing area and the lower frame of the board surface; and the color value of each pixel point forming the preset graph is the same as that of the target pixel point.
In a third aspect, an embodiment of the present application provides an electronic board, including:
a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the method of identifying a touching object as described in any one of the above first aspects when executing the computer program.
In a fourth aspect, the present application provides a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, the computer program implements the steps of the display method according to any one of the first aspect.
In a fifth aspect, an embodiment of the present application provides a computer program product, which, when run on a terminal device, causes the terminal device to execute the display method according to any one of the above first aspects.
Compared with the prior art, the embodiment of the application has the advantages that:
according to the display method based on the electronic board, when the erasing operation is detected, the erasing area corresponding to the erasing operation is determined; if target pixel points with color values different from the color values corresponding to the color of the electronic board exist in the erasing area, it is indicated that an erasing object with the color different from the color of the electronic board exists in the erasing area, therefore, a plurality of preset graphs with the same color as the color of the erasing object are dynamically displayed in a target display area between the erasing area and a lower frame of the board of the electronic board, so that the dropping process of chalk dust corresponding to the erasing operation based on the blackboard is simulated, and the truth of the erasing operation based on the electronic board on the simulation of the erasing operation based on the traditional blackboard is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a flowchart illustrating an implementation of a display method based on an electronic board according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a target display area provided by an embodiment of the present application;
fig. 3 is a schematic diagram of a process for dynamically displaying a plurality of preset images according to an embodiment of the present application;
FIG. 4 is a flowchart illustrating an implementation of a display method based on an electronic board according to another embodiment of the present application;
fig. 5 is a schematic structural diagram of an electronic board provided in an embodiment of the present application;
fig. 6 is a schematic structural diagram of an electronic board according to another embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It should also be understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to" determining "or" in response to detecting ". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".
Furthermore, in the description of the present application and the appended claims, the terms "first," "second," "third," and the like are used for distinguishing between descriptions and not necessarily for describing or implying relative importance.
Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless expressly specified otherwise.
Referring to fig. 1, fig. 1 is a flowchart illustrating an implementation of a display method based on an electronic board according to an embodiment of the present disclosure. The face of electronic plate is the touch-control board, install multiunit infrared ray sensor on the frame of face, every group infrared ray sensor all includes an infrared emitter and an infrared receiver, many infrared rays that multiunit infrared ray sensor produced form the infrared detection net on the face of electronic plate, when object touch electronic plate, part infrared ray on the face of electronic plate can be sheltered from by the touching thing, consequently, the position of touch point and the area of confirming the touch point can be confirmed according to the infrared sheltering from the condition on the face of electronic plate to the electronic plate.
The touch object may be a finger or a stylus pen, and the user may perform writing operation on the board surface of the electronic board through the finger or the stylus pen. Because when the face of electronic plate is touched to finger or touch-control pen, the area of the touch point that finger or touch-control pen correspond all is less than predetermineeing the area threshold value, consequently, electronic plate when detecting the touch point that the area is less than predetermineeing the area threshold value that exists on the face, electronic plate can confirm to detect and write the operation to can adjust the colour value of the pixel point in the display area that the touch point corresponds on the face to preset colour value, with the function of the content of writing is shown in the display area that the realization corresponds at the touch point.
The preset area threshold may be set according to actual needs, and is not limited here. The preset color value is different from the color value corresponding to the color of the surface of the electronic board. The color of the face of electronic board can set up according to actual need, does not make the restriction here, and is exemplary, and the color of the face of electronic board can be white, and the colour value that predetermines can be the corresponding colour value of black.
After the electronic board displays the written content on the board surface, the user can also erase the written content by triggering an erasing operation. Because the area of the touch point corresponding to the erasing operation is usually greater than or equal to the preset area threshold, when the electronic board detects that the touch point with the area greater than or equal to the preset area threshold exists on the board surface, it can be determined that the erasing operation is detected, so that the function of erasing the content written on the board surface is realized.
As shown in fig. 1, an electronic board-based display method provided in an embodiment of the present application may include the following steps:
in S101, when an erase operation is detected, an erase region corresponding to the erase operation is determined.
In the embodiment of the application, when the electronic board detects the erasing operation on the board surface of the electronic board, the erasing area corresponding to the erasing operation can be determined.
Since the area of the touch point corresponding to the erasing operation is usually greater than or equal to the preset area threshold, in an embodiment of the application, when the electronic board detects that the touch point whose area is greater than or equal to the preset area threshold exists on the board surface of the electronic board, it is determined that the erasing operation is detected, and the touch area occupied by the touch point is determined as the erasing area.
In this embodiment, when the electronic board detects that a part of the infrared ray is blocked on the board surface of the electronic board, it can be determined that a touch object touching the board surface of the electronic board exists at the blocked part of the infrared ray, and a touch point corresponding to the touch object exists on the board surface of the electronic board. The touch point refers to a contact point between the touch object and the plate surface of the electronic plate.
When the electronic board detects a touch point, the area of the touch point can be determined according to the shielded part of the infrared ray, and whether the area of the touch point is larger than or equal to a preset area threshold value or not is detected. And if the electronic board detects that the area of the touch point is larger than or equal to a preset area threshold value, determining that the erasing operation is detected, and determining the area occupied by the touch point as an erasing area. The preset area threshold may be set according to actual needs, and is not limited here.
In the embodiment of the application, after the electronic board determines the erasing area corresponding to the erasing operation, whether the target pixel point with the color value different from the color corresponding to the color of the board surface of the electronic board exists in the erasing area is detected. When detecting that target pixel points with color values different from color values corresponding to the color of the board surface of the electronic board exist in the erasing area, the electronic board determines that an erasing object with color different from the color of the board surface of the electronic board exists in the erasing area, and at the moment, the electronic board executes S102; when the electronic board detects that there is no target pixel point with a color value different from the color corresponding to the color of the board surface of the electronic board in the erasing area, it is determined that there is no erasing object with a color different from the color of the board surface of the electronic board in the erasing area, and at this time, the electronic board does not execute subsequent S102.
In S102, if a target pixel point having a color value different from a color value corresponding to a color of a board surface of the electronic board exists in the erasing area, dynamically displaying a plurality of preset graphics in a target display area corresponding to the erasing area; wherein the target display area is between the erase area and a lower frame of the electronic board; and the color value of each pixel point forming the preset graph is the same as that of the target pixel point.
In the embodiment of the application, the electronic board can dynamically display a plurality of preset graphs in the target display area corresponding to the erasing area so as to simulate the dropping process of chalk dust corresponding to the erasing operation based on the blackboard.
It should be noted that, since dynamically displaying a plurality of preset graphics in the target display area is to simulate a chalk dropping process corresponding to a blackboard-based erasing operation, and the chalk is usually present below the erasing area, in this embodiment of the application, the target display area may be an area between the lower side of the erasing area and a lower frame of a board surface of the electronic board. The electronic board may determine the target display area from the erase area.
Specifically, in this embodiment of the application, the erasing area may be a rectangular area, and the target display area may be an area that does not overlap with the erasing area in a projection area formed by a first diagonal line of the erasing area and a projection of the first diagonal line on a lower frame of a board surface of the electronic board. The first diagonal line is a diagonal line, of the two diagonal lines of the erasing area, which has a longer projection length on the lower frame of the panel surface of the electronic board.
It should be noted that projections of two diagonal lines of the erasing area on the lower frame of the board surface of the electronic board are line segments, and lengths of projections of the two diagonal lines of the erasing area on the lower frame of the board surface of the electronic board may be the same or different.
Based on this, when the electronic board determines the target display area, the lengths of the projections of the two diagonal lines of the erasing area on the lower frame of the board surface of the electronic board may be compared.
In an embodiment of the application, when the lengths of the projections of the two diagonal lines of the erasing area on the lower frame of the board surface of the electronic board are different, the electronic board may determine, as the first diagonal line, the diagonal line of the two diagonal lines of the erasing area, which has the longer length of the projection on the lower frame of the board surface of the electronic board.
For example, as shown in (a) of fig. 2, assuming that a projection of a diagonal line 21 of the erasing area 20 on the lower frame 11 of the board surface of the electronic board 10 is L1, a length of L1 is a1, a projection of a diagonal line 22 of the erasing area 20 on the lower frame 11 of the board surface of the electronic board 10 is L2, a length of L2 is a2, and a1 is greater than a2, the electronic board may determine the diagonal line 21 as a first diagonal line of the erasing area 20.
In another embodiment of the present application, when the lengths of the projections of the two diagonal lines of the erasing area on the lower frame of the board surface of the electronic board are the same, the electronic board may determine any one of the two diagonal lines of the erasing area as the first diagonal line.
For example, as shown in (b) of fig. 2, assuming that the projection of the diagonal line 21 and the diagonal line 22 of the erasing area 20 on the lower frame 11 of the board surface of the electronic board 10 is L5, and the length of the L5 is a3, the electronic board may determine the diagonal line 21 or the diagonal line 22 as the first diagonal line of the erasing area 20.
After determining the first diagonal line of the erasing area, the electronic board may determine, as the target display area, an area that does not overlap with the erasing area in a projection area formed by the first diagonal line of the erasing area and a projection of the first diagonal line on a lower frame of a board surface of the electronic board.
In this embodiment, the electronic board may connect, by using a straight line, two end points of the first diagonal line of the erasing area with two end points of the projection of the first diagonal line on the lower frame of the board surface, respectively, to form the projection area.
Illustratively, in conjunction with fig. 2 (a), the projection area 30 is formed by the diagonal line 21 of the erasing area 20, the projection L1 of the diagonal line 21 on the lower frame 11 of the board surface of the electronic board 10, the line segment L3, and the line segment L4. The area of the projection area 30 that does not overlap the erase area 20 is a shaded area in the figure, which is the target display area 40.
Illustratively, in conjunction with (b) in fig. 2, the diagonal line 21 of the erasing area 20, a projection L5 of the diagonal line 21 on the lower frame 11 of the board surface of the electronic board 10, a line segment L6, and a line segment L7 constitute the projection area 30. The area of the projection area 30 that does not overlap the erase area 20 is a shaded area in the figure, which is the target display area 40.
After the electronic board determines the target display area, a plurality of preset graphs can be dynamically displayed in the target display area. Each preset graph is composed of a plurality of pixel points, and the color value of each pixel point forming the preset graph is the same as that of the target pixel point.
In an embodiment of the present application, the electronic board dynamically displays a plurality of preset graphics in the target display area, and specifically may include the following steps:
and the electronic board displays a group of preset graphs at different positions of the target display area at preset time intervals until the currently displayed group of preset graphs meet preset requirements. Wherein, the current time refers to the time when a group of preset graphs are displayed each time. The preset time interval can be set according to actual needs, and is not limited herein.
It should be noted that, in this embodiment, a set of preset graphics displayed by the electronic board at different positions of the target display area at preset time intervals may be the same set of preset graphics. The transparency of each group of preset graphics displayed by the electronic board at different positions of the target display area can be the same or different. The set of preset patterns includes a plurality of preset patterns.
In practical application, the display duration of each group of preset graphics is a preset time interval, that is, when the electronic board displays the next group of preset graphics in the target display area, the group of preset graphics is not displayed any more, that is, only one group of preset images is displayed in the target display area at the same time.
In this embodiment, the step of displaying no more preset graphics on the electronic board may be: the electronic board adjusts the color value of each pixel point in the last group of preset patterns into the color value which is the same as the color of the board surface of the electronic board.
The size and the shape of each preset figure in each group of preset figures and the shortest distance between each preset figure and the lower frame of the board surface of the electronic board can be the same or different.
Because a set of preset graphics includes a plurality of preset graphics, consequently, what contains in the later demonstration a set of preset graphics, the preset graphics that correspond with a certain preset image in the first demonstration a set of preset graphics refer to: and the preset graphs contained in the group of preset graphs displayed later are the same as the preset graphs in the group of preset graphs displayed earlier in shape, size, position relation with other preset graphs in the same group and the like.
In this embodiment, a first distance between each preset figure in the group of preset figures displayed later and the lower frame of the panel surface of the electronic board is respectively smaller than a second distance between the corresponding preset figure in the group of preset figures displayed earlier and the lower frame of the panel surface of the electronic board. The first distance refers to the shortest distance between each preset graph displayed later and the lower frame of the board surface of the electronic board, and the second distance refers to the shortest distance between each preset graph displayed earlier and the lower frame of the board surface of the electronic board.
For example, as shown in fig. 3, it is assumed that the electronic board 10 displays a set of preset graphics, namely preset graphics 41, 42 and 43, at a first position a on the board surface of the electronic board 10 at time T1; after a preset time interval Δ T, the electronic board 10 displays a group of preset graphs, namely preset graphs 41', 42' and 43', at a second position B at a time T1+ Δ T, and at this time, the electronic board does not display the preset graphs 41, 42 and 43 any more; after a preset time interval Δ T, the electronic board 10 displays a set of preset patterns 41", 42" and 43 "at the third position C at the time T1+2 Δ T, and at this time, the electronic board does not display the preset patterns 41, 42, 43, 41', 42' and 43 '.
It should be noted that 41 ″ of the preset patterns displayed by the electronic board at the time T1+2 Δ T corresponds to 41 'of the preset patterns displayed by the electronic board at the time T1+ Δ T, and 41' of the preset patterns displayed by the electronic board at the time T1+ Δ T corresponds to 41 of the preset patterns displayed by the electronic board at the time T1; 42 "and 43" in the preset pattern corresponding to the time T1+2 Δ T, and so on. Taking the preset graphics 41, 41 'and 41 ″ displayed by the electronic board at different times as an example, as shown in (b) of fig. 3, the distance b1 between the later displayed 41' and the lower frame 11 is smaller than the distance b2 between the earlier displayed 41 and the lower frame 11; as shown in fig. 3 (c), the distance b3 between the rear display 41 ″ and the lower frame 11 is smaller than the distance b1 between the front display 41' and the lower frame 11.
It should be noted that the dotted line in fig. 3 is only for convenience of understanding, and in practical applications, the electronic board does not show the dotted line.
In another embodiment of the present application, since the chalk dust generated by erasing the contents written on the blackboard is irregular, in order to improve the reality of the simulated chalk dust, when the electronic board dynamically displays a plurality of preset graphics in the target display area, the method may specifically include the following steps:
and the electronic board determines a group of circular display areas at different positions of the target display area at preset time intervals, and adjusts the color values of part of the pixel points corresponding to each circular display area to the color values of the target pixel points.
The electronic board adjusts the color values of part of the pixel points in the pixel points corresponding to each circular display area into the color values of the target pixel points, and adjusts the color values of the rest of the pixel points in the pixel points corresponding to the circular display areas into the color values corresponding to the color of the board surface of the electronic board, so that a group of preset graphs displayed at different positions of the target display area are irregular. The number of partial pixel points in the pixel points corresponding to each circular display area can be set according to actual needs, and the number is not limited here.
It should be noted that the transparency of a set of preset graphics displayed by the electronic board at different positions of the target display area may be the same or different.
In an embodiment of the application, when the transparency of a set of preset graphics displayed by the electronic board at different positions of the target display area is the same, the electronic board displays the set of preset graphics at different positions of the target display area at preset time intervals until the currently displayed set of preset graphics meets preset requirements, which may specifically include:
and displaying a group of preset graphs at different positions of the target display area by the electronic board at preset time intervals until the minimum value of a third distance between each preset graph in the group of currently displayed preset graphs and the lower frame of the board surface of the electronic board is smaller than a preset distance threshold value.
In this embodiment, the current time refers to a time when a group of preset graphics is displayed. The third distance refers to the shortest distance between each preset graph in the group of preset graphs displayed currently and the lower frame of the board surface of the electronic board. The preset distance threshold may be set according to actual needs, and is not limited herein.
In another embodiment of the present application, when the transparency of a group of preset graphics displayed by the electronic board at different positions of the target display area is different, the electronic board displays the group of preset graphics at different positions of the target display area at preset time intervals until the currently displayed group of preset graphics meets preset requirements, which may specifically include S201 to S202 shown in fig. 4, and the details are as follows:
in S201, a group of preset graphics is displayed at different positions of the target display area at preset time intervals until the transparency of each preset graphic in the group of preset graphics currently displayed is greater than a preset transparency threshold.
In this embodiment, in order to improve the fidelity of the simulation of the chalk dust falling process corresponding to the erasing operation based on the conventional blackboard by the erasing operation based on the electronic board, the transparency of a set of preset graphics displayed by the electronic board at different positions of the target display area is gradually reduced as time passes.
It should be noted that the difference between the transparency levels of two adjacent sets of preset patterns may be equal or unequal. The preset transparency threshold may be set according to actual needs, and is not limited herein.
In S202, a set of preset graphics is displayed at different positions of the target display area at preset time intervals until a minimum value of a third distance between each preset graphic of the set of preset graphics currently displayed and the lower frame is smaller than a preset distance threshold.
The present embodiment is the same as the above-mentioned embodiment in which the transparency of a group of preset graphics displayed by the electronic board at different positions of the target display area is the same, and details are not described here again.
As can be seen from the above, according to the display method based on the electronic board provided by the embodiment of the application, when the erasing operation is detected, the erasing area corresponding to the erasing operation is determined; if target pixel points with color values different from the color values corresponding to the color of the electronic board exist in the erasing area, it is indicated that an erasing object with the color different from the color of the electronic board exists in the erasing area, therefore, a plurality of preset graphs with the same color as the color of the erasing object are dynamically displayed in a target display area between the erasing area and a lower frame of the board of the electronic board, so that the dropping process of chalk dust corresponding to the erasing operation based on the blackboard is simulated, and the truth of the erasing operation based on the electronic board on the simulation of the erasing operation based on the traditional blackboard is improved.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
Fig. 5 shows a block diagram of an electronic board according to an embodiment of the present application, which corresponds to the display method based on an electronic board according to the above embodiment, and only shows the relevant parts of the electronic board according to the embodiment of the present application for convenience of description. Referring to fig. 5, the electronic board 500 includes: a determination unit 51 and a display unit 52. Wherein:
the determining unit 51 is configured to determine an erase region corresponding to an erase operation when the erase operation is detected.
The display unit 52 is configured to dynamically display a plurality of preset graphics in a target display area corresponding to the erasing area if a target pixel point having a color value different from a color value corresponding to a color of the panel surface of the electronic board exists in the erasing area; the target display area is arranged between the erasing area and the lower frame of the board surface; and the color value of each pixel point forming the preset graph is the same as that of the target pixel point.
In an embodiment of the present application, the first determining unit 51 is specifically configured to: when the touch point with the area larger than or equal to the preset area threshold value exists on the board surface of the electronic board, the erasing operation is determined to be detected, and the touch area occupied by the touch point is determined to be the erasing area.
In one embodiment of the present application, the erasing area is a rectangular area; correspondingly, the display unit 52 specifically includes:
the target display area is an area which is not overlapped with the erasing area in a projection area formed by a first diagonal line of the erasing area and the projection of the first diagonal line on the lower frame; the first diagonal line is a diagonal line, of two diagonal lines of the erasing area, which has a longer projection length on the lower frame.
In an embodiment of the present application, the display unit 52 specifically includes: and a dynamic display unit.
The dynamic display unit is used for displaying a group of preset graphs at different positions of the target display area at preset time intervals until the group of preset graphs displayed currently meet preset requirements; the display duration of each group of preset graphs is the preset time interval, and the first distance between each preset graph in the group of preset graphs and the lower frame displayed later is smaller than the second distance between the corresponding preset graph in the group of preset graphs and the lower frame displayed earlier.
In one embodiment of the present application, the dynamic display unit further includes:
the transparency of each preset graph in the group of preset graphs displayed later is larger than that of each preset graph in the group of preset graphs displayed earlier.
In an embodiment of the present application, the dynamic display unit specifically includes: and a graphic display unit.
The graph display unit is used for displaying a group of preset graphs at different positions of the target display area at preset time intervals until the transparency of each preset graph in the group of preset graphs which are displayed currently is larger than a preset transparency threshold.
Or the display device is used for displaying a group of preset graphs at different positions of the target display area at preset time intervals until the minimum value of a third distance between each preset graph in the group of preset graphs and the lower frame which are currently displayed is smaller than a preset distance threshold.
In an embodiment of the present application, the dynamic display unit is specifically configured to: and determining a group of circular display areas at different positions of the target display area at preset time intervals, and adjusting the color values of part of the pixels corresponding to each circular display area to the color values of the target pixels.
As can be seen from the above, according to the electronic board provided by the application, when the erasing operation is detected, the erasing area corresponding to the erasing operation is determined; if target pixel points with color values different from the color values corresponding to the color of the electronic board exist in the erasing area, it is indicated that an erasing object with the color different from the color of the electronic board exists in the erasing area, therefore, a plurality of preset graphs with the same color as the color of the erasing object are dynamically displayed in a target display area between the erasing area and a lower frame of the board of the electronic board, so that the dropping process of chalk dust corresponding to the erasing operation based on the blackboard is simulated, and the truth of the erasing operation based on the electronic board on the simulation of the erasing operation based on the traditional blackboard is improved.
It should be noted that, for the information interaction, the execution process, and other contents between the above units, the specific functions and the technical effects of the embodiments of the method of the present application are based on the same concept, and specific reference may be made to the above embodiments of the method, and details are not described here.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
Fig. 6 is a schematic structural diagram of an electronic board according to an embodiment of the present application. As shown in fig. 6, the electronic board 6 of this embodiment includes: at least one processor 60 (only one shown in fig. 6), a memory 61, and a computer program 62 stored in the memory 61 and executable on the at least one processor 60, the processor 60 implementing the steps in any of the above embodiments of the electronic board based touch object recognition method when executing the computer program 62.
The electronic board 6 may be a desktop computer, a notebook, a palm computer, a cloud electronic board, or other computing devices. The electronic board may include, but is not limited to, a processor 60, a memory 61. It will be understood by those skilled in the art that fig. 6 is merely an example of the electronic board 6, and does not constitute a limitation to the electronic board 6, and may include more or less components than those shown, or combine some components, or different components, such as input and output devices, network access devices, etc.
The Processor 60 may be a Central Processing Unit (CPU), and the Processor 60 may be other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 61 may in some embodiments be an internal storage unit of the electronic board 6, such as a hard disk or a memory of the electronic board 6. The memory 61 may also be an external storage device of the electronic board 6 in other embodiments, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, which are provided on the electronic board 6. Further, the memory 61 may also include both an internal storage unit and an external storage device of the electronic board 6. The memory 61 is used for storing an operating system, an application program, a BootLoader (BootLoader), data, and other programs, such as program codes of the computer program. The memory 61 may also be used to temporarily store data that has been output or is to be output.
An embodiment of the present application further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the steps in any one of the above embodiments of the display method based on the electronic board may be implemented.
The embodiment of the present application provides a computer program product, which when running on a mobile terminal, enables the mobile terminal to implement the steps in any one of the above embodiments of the display method based on an electronic board when executed.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, all or part of the processes in the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium and can implement the steps of the embodiments of the methods described above when the computer program is executed by a processor. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include at least: any entity or device capable of carrying computer program code to a photographing apparatus/terminal apparatus, a recording medium, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), an electrical carrier signal, a telecommunications signal, and a software distribution medium. Such as a usb-disk, a removable hard disk, a magnetic or optical disk, etc. In certain jurisdictions, computer-readable media may not be an electrical carrier signal or a telecommunications signal in accordance with legislative and patent practice.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed electronic board based display method, electronic board and computer storage medium may be implemented in other ways. For example, the above-described electronic board embodiments are merely illustrative, and for example, the division of the modules or units is only one logical functional division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. An electronic board based display method, comprising:
when an erasing operation is detected, determining an erasing area corresponding to the erasing operation;
if a target pixel point with a color value different from the color value corresponding to the color of the panel surface of the electronic board exists in the erasing area, dynamically displaying a plurality of preset graphs in a target display area corresponding to the erasing area; the target display area is arranged between the erasing area and the lower frame of the board surface; and the color value of each pixel point forming the preset graph is the same as that of the target pixel point.
2. The display method according to claim 1, wherein when an erasing operation is detected, determining an erasing area corresponding to the erasing operation comprises:
when the touch point with the area larger than or equal to the preset area threshold value exists on the board surface of the electronic board, the erasing operation is determined to be detected, and the touch area occupied by the touch point is determined to be the erasing area.
3. The display method according to claim 1, wherein the erasing area is a rectangular area; the target display area is an area which is not overlapped with the erasing area in a projection area formed by a first diagonal line of the erasing area and the projection of the first diagonal line on the lower frame; the first diagonal line is a diagonal line, of two diagonal lines of the erasing area, which has a longer projection length on the lower frame.
4. The display method according to claim 1, wherein the dynamically displaying a plurality of preset graphics in the target display area corresponding to the erasing area comprises:
displaying a group of preset graphs at different positions of the target display area at preset time intervals until the group of preset graphs displayed currently meet preset requirements; the display duration of each group of preset graphs is the preset time interval, and the first distance between each preset graph in the group of preset graphs and the lower frame displayed later is smaller than the second distance between the corresponding preset graph in the group of preset graphs and the lower frame displayed earlier.
5. The display method according to claim 4, wherein a transparency of each of the set of preset graphics displayed later is greater than a transparency of each of the set of preset graphics displayed earlier.
6. The method according to claim 5, wherein displaying a set of preset graphics at different positions of the target display area at preset time intervals until the currently displayed set of preset graphics meets preset requirements comprises:
displaying a group of preset graphs at different positions of the target display area at preset time intervals until the transparency of each preset graph in the group of preset graphs which are displayed currently is larger than a preset transparency threshold;
or displaying a group of preset graphs at different positions of the target display area at preset time intervals until the minimum value of a third distance between each preset graph in the group of preset graphs and the lower frame which are currently displayed is smaller than a preset distance threshold.
7. The display method according to claim 4, wherein displaying a set of preset graphics at different positions of the target display area at preset time intervals comprises:
and determining a group of circular display areas at different positions of the target display area at preset time intervals, and adjusting the color values of part of the pixels corresponding to each circular display area to the color values of the target pixels.
8. An electronic board, comprising:
the device comprises a determining unit, a judging unit and a judging unit, wherein the determining unit is used for determining an erasing area corresponding to an erasing operation when the erasing operation is detected;
the display unit is used for dynamically displaying a plurality of preset graphs in a target display area corresponding to the erasing area if a target pixel point with a color value different from a color value corresponding to the color of the board surface of the electronic board exists in the erasing area; the target display area is arranged between the erasing area and the lower frame of the board surface; and the color value of each pixel point forming the preset graph is the same as that of the target pixel point.
9. An electronic board comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the method according to any of claims 1 to 7 when executing the computer program.
10. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 1 to 7.
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