CN110032317B - Wireless demonstration equipment and marking control method and device thereof - Google Patents

Wireless demonstration equipment and marking control method and device thereof Download PDF

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CN110032317B
CN110032317B CN201910249725.7A CN201910249725A CN110032317B CN 110032317 B CN110032317 B CN 110032317B CN 201910249725 A CN201910249725 A CN 201910249725A CN 110032317 B CN110032317 B CN 110032317B
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marking
marking line
key
area
light spot
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CN110032317A (en
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杨超峰
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Shenzhen Gridmore Innovative Technology Co ltd
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Shenzhen Gridmore Innovative Technology Co ltd
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/048Interaction techniques based on graphical user interfaces [GUI]
    • G06F3/0484Interaction techniques based on graphical user interfaces [GUI] for the control of specific functions or operations, e.g. selecting or manipulating an object, an image or a displayed text element, setting a parameter value or selecting a range
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00Arrangements for program control, e.g. control units
    • G06F9/06Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/44Arrangements for executing specific programs
    • G06F9/451Execution arrangements for user interfaces

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  • Theoretical Computer Science (AREA)
  • Software Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • User Interface Of Digital Computer (AREA)

Abstract

An annotation control method of a wireless presentation device includes: adding an image superposition layer on a demonstration graphical interface; receiving a key instruction of the first key, and drawing a marking line on the image overlaying layer according to the key instruction; after the drawing of the marking line is finished, calculating the size of the marking line, and comparing the size of the marking line with a preset first threshold value; and if the size of the marking line is smaller than the first threshold value, deleting the marking line or setting a marking area which can contain a preset minimum operation area for the marking line. The marking line can be directly drawn on the image superposition layer through a key instruction of the first key, so that the marking operation can be simplified; and when the size of the marking line is smaller than the first threshold value, the marking line is directly deleted, or a marking area which can contain a preset minimum operation area is arranged for the marking line, so that the deleting operation is simpler and more convenient.

Description

Wireless demonstration equipment and marking control method and device thereof
Technical Field
The application belongs to the field of wireless demonstration devices, and particularly relates to a wireless demonstration device and a marking control method and device thereof.
Background
The wireless presenter is an important device in a conference room and is used for highlighting important contents when a speaker explains PPT and other materials. The main product category of the wireless demonstrator is a laser demonstrator, also called a laser pen, which comprises a laser emitter, wherein a speaker presses an activation key to trigger laser, and a laser point is used for illuminating key contents on a screen to achieve the purpose of highlighting the key contents. In recent years, LCD/LED large screens have become more and more inexpensive, have higher brightness, higher contrast, and better color reproduction than projectors, and therefore, more and more conference rooms, classrooms, and training rooms have come to use LCD/LED large screens. Because the reflection of the surface of the LCD/LED large screen to the laser is not diffuse reflection but specular reflection, the light spots in the incident direction are very dark, and the light spots in the emergent direction are too bright, so the laser demonstrator is not suitable for the LCD/LED large screen.
The digital wireless presenter can solve the above problems by adopting a digital light spot technology, wherein a digital light spot is a graphic object which is displayed on the lecture content in an overlapping manner, for example, a high-brightness red circular spot is displayed, and the explanation focus is highlighted by using the graphic object. A common implementation of a digital wireless presenter is a built-in motion sensor (including accelerometers and gyroscopes) that can sense the motion of the wireless presenter in three-dimensional space, calculate the coordinates of a digital light spot on a display screen from the motion data, and then display the digital light spot on the coordinates. Therefore, the speaker can control the digital light spot to move on the display screen through hand motion, and the prominent marking of the key contents of the speech is realized.
The digital wireless demonstrator can be used on an LCD/LED large screen, and has the advantages of multiple modes, richer functions and more prominent explanation focus. There are three common modes of digital light spots: 1. indicating a mode: displaying an indication light spot on a display screen, wherein the common shape of the indication light spot is a highlighted circular icon or an arrow icon, and the indication light spot is similar to a laser spot and is used for indicating key contents; 2. and (3) marking a mode: displaying a label icon on a display screen, wherein the label icon is usually in the shape of a painting brush, and the difference between the label mode and the indication mode is that when the label icon moves on the display screen, a label line is drawn on the explanation content; 3. amplification mode: and displaying an amplification area on the display screen, and amplifying and displaying a part of the speech data of the coordinate position of the digital light spot in the amplification area to highlight detail content.
Wherein, the marking line is an effective tool for highlighting the key contents. At present, the digital wireless demonstrator has low support degree for the annotation function, and some products do not support the annotation function or only call the annotation function supported by demonstration software (such as PPT). By means of the marking function of the demonstration software, the marking line can be drawn only on the speech data played by the demonstration software, and the application range of the digital wireless demonstrator is limited. Another bigger problem is that the digital wireless presenter is operated by holding the presenter by hand, and inevitably shakes, the control accuracy of the digital light spot is far lower than that of a desktop mouse or a stylus pen, and the digital wireless presenter is inconvenient to operate by aiming at the operation mode designed by the desktop mouse or the stylus pen, such as operations of label drawing, deletion and the like.
Disclosure of Invention
In view of this, embodiments of the present application provide a wireless presentation device and a method and an apparatus for controlling annotation thereof, so as to solve the problem that the annotation function of the wireless presentation device in the prior art is not easy to operate due to low accuracy of handheld control.
A first aspect of an embodiment of the present application provides an annotation control method for a wireless presentation device, where the wireless presentation device includes a handheld device, the handheld device includes a first key, and the annotation control method for the wireless presentation device includes:
adding an image superposition layer on a demonstration graphical interface;
receiving a key instruction of the first key, and drawing a marking line on the image overlaying layer according to the key instruction;
after the drawing of the marking line is finished, calculating the size of the marking line, and comparing the size of the marking line with a preset first threshold value;
and if the size of the marking line is smaller than the first threshold value, deleting the marking line or setting a marking area which can contain a preset minimum operation area for the marking line.
With reference to the first aspect, in a first possible implementation manner of the first aspect, the step of drawing a mark line on the image overlay layer according to the key instruction includes:
detecting a key instruction of which the pressing time or the touch time of the first key is greater than a first preset time;
setting a mode of a digital light spot as a marking mode according to the key instruction, displaying a marking light spot on a display screen, controlling the marking light spot to move according to the movement of the handheld device, and drawing a marking line on the image overlaying layer according to the movement of the marking light spot;
when a releasing instruction or a touch stopping instruction of the first key is received, drawing the marking line and keeping the drawn marking line on the image overlaying layer;
or may comprise, in combination with the above-mentioned,
receiving a key instruction of pressing or clicking the first key;
when a pressing instruction or a clicking instruction of the first key is received, if the mode of the digital light spot is not the labeling mode, setting the mode of the digital light spot as the labeling mode, displaying a labeling light spot on a display screen, controlling the movement of the labeling light spot according to the movement of the handheld device, and drawing a labeling line on the image overlaying layer according to the movement of the labeling light spot;
when a pressing instruction or a clicking instruction of the first key is received, if the mode of the digital light spot is the marking mode, the marking line is drawn, and the drawn marking line is retained on the image overlaying layer.
With reference to the first aspect, in a second possible implementation manner of the first aspect, the annotation control method further includes:
when the digital light spot is an indication light spot and is positioned in a marking area of an existing marking line, receiving a click command or a double click command of the first key;
and deleting the mark line when the click command or the double-click command is received.
With reference to the first aspect, in a third possible implementation manner of the first aspect, the annotation control method further includes:
when the indication light point moves into the marking area of the existing marking line, the marking line and/or the marking area thereof are displayed in different display styles.
A second aspect of an embodiment of the present application provides an annotation control apparatus for a wireless presentation device, where the wireless presentation device includes a handheld device, the handheld device includes a first key, and the annotation control apparatus for the wireless presentation device includes:
the layer adding unit is used for adding an image superposition layer on the demonstration graphical interface;
the marking line drawing unit is used for receiving a key instruction of the first key and drawing a marking line on the image overlaying layer according to the key instruction;
the marking line comparison unit is used for calculating the size of the marking line after the marking line is drawn, and comparing the size of the marking line with a preset first threshold value;
and the marking line transformation unit is used for deleting the marking line or setting a marking area which can contain a preset minimum operation area for the marking line if the size of the marking line is smaller than the first threshold value.
With reference to the second aspect, in a first possible implementation manner of the second aspect, the callline drawing unit includes:
the first key detection unit is used for detecting a key instruction of which the pressing time or the touch time of the first key is greater than a first preset time;
the first label drawing unit is used for setting the mode of the digital light spot as a label mode according to the key instruction, displaying a label light spot on a display screen, controlling the label light spot to move according to the movement of the handheld device, and drawing a label line on the image overlaying layer according to the movement of the label light spot;
the first drawing completion unit is used for completing drawing of the marking line and keeping the drawn marking line on the image overlaying layer when a releasing instruction or a touch stopping instruction of the first key is received;
or may comprise, in combination with the above-mentioned,
the second key detection unit is used for receiving a pressing instruction or a clicking instruction of the first key;
the second label drawing unit is used for setting the mode of the digital light spot as a label mode if the mode of the digital light spot is not the label mode when a pressing instruction or a clicking instruction of the first key is received, displaying the label light spot on a display screen, controlling the label light spot to move according to the movement of the handheld device, and drawing a label line on the image overlaying layer according to the movement of the label light spot;
and the second drawing completion unit is used for completing the drawing of the marking line and keeping the drawn marking line on the image superposition layer if the mode of the digital light spot is the marking mode when the pressing instruction or the clicking instruction of the first key is received.
With reference to the second aspect, in a second possible implementation manner of the second aspect, the annotation control device further includes:
the instruction receiving unit is used for receiving a click instruction or a double-click instruction of the first key when the digital light spot is an indication light spot and is positioned in a marking area of the existing marking line;
and the marking line deleting unit is used for deleting the marking line when the click command or the double-click command is received.
With reference to the second aspect, in a third possible implementation manner of the second aspect, the annotation control device further includes:
and the style display unit is used for displaying the marking line and/or the marking area thereof in different display styles when the indication light point moves into the marking area of the existing marking line.
In a third aspect, an embodiment of the present application provides a wireless presentation device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the steps of the annotation control method of the wireless presentation device according to any one of the first aspect when executing the computer program.
In a fourth aspect, the present application provides a computer-readable storage medium, which stores a computer program, and the computer program, when executed by a processor, implements the steps of the annotation control method for a wireless presentation device according to any one of the first aspect.
Compared with the prior art, the embodiment of the application has the advantages that:
the method comprises the steps of adding an image superposition layer on a demonstration graphical interface, drawing a marking line on the image superposition layer when a key instruction of a first key is received, calculating the size of the marking line after the marking line is drawn, comparing the size of the marking line with a preset first threshold value, and deleting the marking line or setting a marking area which can contain a preset minimum operation area for the marking line if the size of the marking line is smaller than the first threshold value. Because the image overlaying layer is created for drawing the marking line, the marking line can be directly drawn on the image overlaying layer through the key instruction of the first key, and the marking operation can be simplified; and when the size of the marking line is smaller than the first threshold value, the marking line is directly deleted, or a marking area which can contain a preset minimum operation area is arranged for the marking line, so that the small marking area can be avoided, and the deleting operation of the marking line is simpler and more convenient.
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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 schematic flow chart illustrating an implementation of an annotation control method of a wireless presentation device according to an embodiment of the present application;
fig. 2 is a schematic diagram of a process of generating a callout line according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram illustrating a process of generating a callout line according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram of an annotation control apparatus of a wireless presentation device according to an embodiment of the present application;
fig. 5 is a schematic diagram of a wireless presentation device provided by an 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.
In order to explain the technical solution described in the present application, the following description will be given by way of specific examples.
Fig. 1 is a schematic implementation flowchart of an annotation control method of a wireless presentation device according to an embodiment of the present application, where the wireless presentation device includes a handheld device, the handheld device includes a first key, and the annotation control method of the wireless presentation device includes:
in step S101, an image overlay layer is added on a presentation graphical interface;
the demonstration graphical interface is a graphical user interface which is output to a display screen by intelligent equipment and corresponds to speech material content. The demonstration graphical interface can be an application graphical interface running in the intelligent device, such as a PPT interface, a WORD interface, other application interfaces or a computer desktop, and can also be a mixture of multiple application interfaces.
The image superposition layer is positioned on the demonstration graphical interface, and the image superposition layer can be one layer or multiple layers. The image overlaying layer can be controlled and edited by a handheld device, for example, the handheld device controls drawing a mark line on the image overlaying layer. A graphics circuit component (e.g., a graphics chip) typically has multiple hardware graphics layers, such as a GUI layer, a video layer, an OSD, etc., and an image overlay layer may be created on a different hardware graphics layer of the graphics circuit component than the presentation graphics interface. The image overlay may also be created on a software graphics layer managed by a graphics operating system (Windows, MacOS, etc.), for example, a window of the graphics operating system may be created, and a Drawing Context (Drawing Context) of the window may be used as an image overlay, or a Drawing Context that replicates an existing window (e.g., a PPT window, etc.) may be used as an image overlay.
If the image superposition layer is established on the hardware graphic layer of the graphic circuit component, the graphic circuit component synthesizes the content of the image superposition layer and the demonstration material content of the demonstration graphic interface and outputs the synthesized content to the display screen. If the graphics overlay is created on the software graphics layer of the graphics operating system, the graphics operating system synthesizes the contents of the graphics overlay with the contents of the presentation material on the presentation graphics interface and outputs the synthesized contents to the display screen. The display screen can be any display device such as a projector, an LCD/LED display, and the like.
The application describes a handheld device, namely a demonstrator for demonstrating operations, wherein a speaker holds the handheld device in hand during a speech process. The handheld device may typically be a digital wireless presenter. The digital wireless demonstrator adopts a digital light spot technology, a digital light spot is a graphic object which is displayed on speech content in a superposed mode, such as an icon in a striking light spot shape, and a speaker controls the graphic object to move on a display screen through a handheld device, so that the explanation focus is marked.
The common realization mode of the digital wireless demonstrator is a built-in motion sensor, the motion sensor comprises an acceleration sensor and a gyroscope, the motion sensor can sense the motion of the digital wireless demonstrator in a three-dimensional space in real time, the coordinate of a digital light spot on a display screen is calculated according to the motion data, and then the digital light spot is superposed on the coordinate. Therefore, the lecturer can control the digital light spot to move on the display screen through hand motion, and the identification of the key content of the lecture is realized. A method for calculating coordinates of digital light points according to motion data sensed by a motion sensor is a known technology, and details are not described in this application.
In step S102, a key instruction of the first key is received, and a marking line is drawn on the image overlay layer according to the key instruction;
in an embodiment of the application, the handheld device includes a first key. The first key can be a key specially used for marking functions, and can also comprise other functions, and the first key is a multifunctional key used for realizing the marking functions in a key mode. The key instruction can be a long press instruction (or a touch instruction), a click instruction or a press instruction, and the like. Drawing the annotation line according to the key instruction of the first key may include two ways as shown in fig. 2 and fig. 3, which are respectively introduced as follows:
in the first mode, the drawing of the annotation line is realized by long pressing or long touching, as shown in fig. 2, specifically including:
in step S201, detecting a key instruction that a pressing time or a touching time of the first key is greater than a first predetermined time;
specifically, when the pressing time or the touching time of the first key of the handheld device is detected, the digital light spot of the handheld device on the display screen may be in an activated state or a blanked state. The first key can be a mechanical key or a touch key, when the first key is the mechanical key, the corresponding pressing time is detected, and when the first key is the touch key, the corresponding touch duration is detected.
In step S202, setting a mode of the digital light spot as a labeling mode according to the key instruction, and displaying the labeling light spot on a display screen;
in the present application, the digital light spot can have a plurality of modes, and the common modes include an indication mode, a labeling mode and an amplification mode.
When the mode of the digital light spot is the indication mode, an indication light spot is displayed on the display screen, the common shape of the indication light spot is a highlight circular icon or an arrow icon, and the speaker can control the indication light spot to move on the display screen by moving the handheld device, and the indication light spot is similar to a laser light spot and used for indicating key contents;
when the mode of the digital light spot is the marking mode, a marking icon is displayed on the display screen, the marking icon is usually in the shape of a painting brush, and when a speaker moves the handheld device to control the marking icon to move on the display screen, the difference between the marking mode and the indicating mode is that a marking line is drawn on explanation content along with the movement of the marking icon on the display screen, and when the marking mode exits, the drawn marking line is kept on the display screen;
and when the mode of the digital light spot is the amplification mode, displaying an amplification area on the display screen, and amplifying and displaying the speech data at the position of the digital light spot in the amplification area to highlight the detailed content.
When the digital light spot is in a blanking state, an indication mode or other non-labeling mode, detecting whether a first key is pressed or touched, if so, acquiring the pressing time length or the touching time length of the first key, and judging whether the pressing time length of the first key is greater than a first preset time length. And if the pressing time is longer than a first preset time, triggering the digital light spot to be displayed as a marking light spot.
As an optional implementation manner of the present application, when the digital light spot is in a blank state, it may further be detected whether the touch duration or the press duration is greater than a second predetermined duration, and if the touch duration or the press duration is greater than the second predetermined duration, the indication light spot is displayed on the display screen, where the second predetermined duration is shorter than the first predetermined duration. With this embodiment, when the first key is pressed while the digital light spot is in a blank state, the indication light spot is triggered and displayed for a period of time, and then the indication light spot is switched to a marking light spot to prompt the operator of the current position of the digital light spot.
In step S203, controlling the movement of the annotation light point according to the movement of the handheld device, and drawing an annotation line on the image overlay layer according to the movement of the annotation light point;
when the digital light spot is displayed as a marking light spot, a presenter can control the marking light spot to move through the handheld device, and draw a marking line on the image superposition layer in real time according to the coordinate of the marking light spot. The type of the mark line can be selected, and different drawing methods are adopted for different types. For example, one type of marking line is a trajectory line that generates a marking line from a moving trajectory of a marking light point; if the other type is a straight line, determining a marking line according to the initial coordinate and the current coordinate of the marking light spot; the other type is a circle (or an ellipse), and the radius of the circle is calculated by taking the initial coordinate of the marking light point as the center of the circle and the distance between the current coordinate and the initial coordinate (or the long radius and the short radius of the ellipse are calculated by a preset length-width ratio) to determine a calibration line; and the other type is a rectangle, the annotation line is determined by marking the initial coordinates of the light point and the current coordinates as two diagonal vertices of the rectangle.
In step S204, when a release instruction or a touch stop instruction of the first key is received, the drawing of the annotation line is completed, and the drawn annotation line is retained on the image overlay layer.
When the presenter continuously presses the first key or continuously touches and moves the position of the marking light point and moves to the end point of the marking line expected to be drawn, the presenter can release the first key or stop touching the first key, and when a release instruction or a stop touch instruction of the first key is detected, drawing of the marking line is completed.
The marking line is drawn in a sampling pressing or continuous touch mode, the marking line on the image superposition layer can be drawn only through one-time pressing operation of one key, the shaking influence caused by key operation can be reduced, and the convenience in operation is improved.
In the second mode, the drawing of the mark line is triggered by a pressing instruction or a clicking instruction, as shown in fig. 3, the method includes:
in step S301, a pressing instruction or a clicking instruction of the first key is received;
the annotation line drawing method shown in fig. 3 is a method different from the trigger and termination methods of the annotation line drawing method shown in fig. 2. The one-time key pressing process of the mechanical key comprises three stages of pressing start, continuous pressing and pressing end, and the one-time touch process of the touch key comprises touch start, continuous touch and touch end. And triggering a pressing instruction when detecting the pressing start or the touch start of the first key, and triggering a clicking instruction when detecting the pressing end or the touch end of the first key.
In step S302, when the press instruction or the click instruction is received, if the mode of the digital light spot is not the label mode, setting the mode of the digital light spot as the label mode, and displaying the label light spot on a display screen;
when a press instruction or a click instruction is received, the mode of the digital light spot is judged, and different instruction contents are triggered according to different current modes. For example, the current mode may be an annotated mode or a non-annotated mode. If the current mode is not the labeling mode, the first key is the labeling key, the triggered function is the labeling function, the mode of the digital light spot enters the labeling mode, and the labeling light spot is displayed on the display screen.
In step S303, controlling the movement of the annotation light point according to the movement of the handheld device, and drawing an annotation line on the image overlay layer according to the movement of the annotation light point;
when the mode of the digital light spot is the marking light spot, drawing a marking line on the image overlaying layer according to the preset marking line type, such as a track line, a straight line, a circle, an ellipse or a rectangle, and the coordinate of the marking light spot.
In step S304, when a pressing instruction or a clicking instruction of the first key is received, if the mode of the digital light spot is the labeling mode, the drawing of the labeling line is completed and the drawn labeling line is retained on the image overlaying layer.
After the marking cursor moves to the specified position and the marking line is confirmed to meet the requirement, the user triggers the pressing instruction or the clicking instruction again, the pressing instruction or the clicking instruction is detected at the moment, the mode of the digital light spot is the marking mode, the drawing of the marking line is finished, and the end point position of the marking line is determined according to the position of the pressing instruction or the clicking instruction.
The two modes can meet the requirement of drawing the marking line through one key, do not need to switch back and forth among a plurality of keys, and are favorable for improving the control precision.
In step S103, after the drawing of the annotation line is completed, calculating the size of the annotation line, and comparing the size of the annotation line with a preset first threshold;
after the drawing of the annotation line is completed, misoperation of a presenter may occur, the drawn annotation line is too small, and at the moment, one annotation point or a small segment of the annotation line is displayed in the image overlaying layer, so that trouble is brought to the explanation of the presenter and trouble is brought to the later deletion. In order to solve the problem, the size of the marking line is compared with a preset first threshold value in the step, and a marking point or a marking line segment smaller than the first threshold value is determined.
The size of the annotation line can be defined in various ways, for example, it can be defined as the length of the annotation line, and for closed annotation lines such as circle, ellipse, rectangle, etc., it can be defined as the area enclosed by the annotation line, and it can also be defined according to the default annotation area of the annotation line, such as the long side of the default annotation area, or its area, or whether it can contain an area with a preset shape, etc.
The marking area of the marking line is used for marking the effective area of the marking line, and the digital light spot can operate the marking line when being positioned in the marking area of the marking line. The marking area is usually larger than the marking line, and the subsequent deletion or selection operation can be more convenient by setting a marking area larger than the marking line for the marking line. After the drawing of the marking line is finished, if the size of the marking line needs to be calculated according to the marking area of the marking line, the default marking area of the marking line is obtained by using the calculation method of the marking area, and the size of the marking line is calculated by using the default marking area. The default annotation region of the annotation line and the final annotation region of the annotation line may be different because if the default annotation region is too small, an optimal adjustment is required to facilitate subsequent operations on the annotation line.
When the size of the annotation line is compared with the first threshold value in this application, the comparison of length, the comparison of area, also can be regional characteristic's comparison, correspondingly, the first threshold value can be length threshold value, area threshold value, also can be for predetermineeing the region of shape etc. wherein, predetermine the region of shape and can be minimum operation zone. Since hand jitter causes the speaker to have limited control accuracy over the position of the digital light point, it is difficult to accurately enter and complete the operation with the handheld device for an excessively small area. The minimum operation area is defined as the minimum area which the speaker can control the digital light spot to move in through the handheld device and conveniently complete the operation. The shape of the minimum operation area may be a square with a preset side length or a circle with a preset radius. Therefore, when the size of the annotation line is compared with the first threshold, the length of the annotation line or the length of the default annotation area thereof may be compared with a preset length threshold, the area enclosed by the annotation line or the area of the default annotation area thereof may be compared with a preset area threshold, or the default annotation area of the annotation line may be compared with an area of a preset shape, for example, to determine whether the default annotation area of the annotation line can include the minimum operation area.
In the application, the default marking area of the marking line has various calculation methods. For example, when the type of the annotation line is a straight line, if the line type of the annotation line is wider, the default annotation region may be the annotation line itself, otherwise, the default annotation region is set as a region covered by a circle of extension outside the annotation line itself; when the marking line can enclose a closed area, for example, the type of the marking line is a circle, an ellipse, a rectangle or a trajectory line (two points from the head to the tail of the trajectory line are connected to form a closed area), the default marking area of the marking line can be set as the closed area; the default marking area of the marking line may also be a rectangular area surrounding the marking line, where the rectangular area may be a minimum rectangular area containing the marking line, or an extended area containing the graphic object marked by the marking line, for example, the extended area may be an entire text block marked by the marking line.
In step S104, if the size of the annotation line is smaller than the first threshold, the annotation line is deleted or a annotation area that can include a preset minimum operation area is set for the annotation line.
If the size of the marking line is smaller than a preset first threshold value, the marking line can be regarded as belonging to a marking line of misoperation, and the marking line can be directly deleted, so that the marking line generated by misoperation is prevented from being displayed on an image superposition layer; or, the decision right to delete the annotation line is left to the speaker, but when the annotation line is too small and the default annotation area cannot contain the minimum operating area, it is difficult for the speaker to select and delete the annotation line, and it is necessary to set an annotation area that can contain the preset minimum operating area for the annotation line. The marking area capable of containing the preset minimum operation area is defined as the marking area, and at least one preset minimum operation area can be embedded in the marking area.
One possible method for setting a label area that can contain a predetermined minimum operating area is: and expanding outwards by taking the default marking area as the center until the default marking area can contain the minimum operation area. Because the default marking region has different styles (such as thickness) or different shapes of lines, the style and size of the default marking region are also different, and when a marking region which can contain a preset minimum operation region is set, a corresponding expansion mode can be selected according to the style or shape of the marking line. For example, when a labeling area of a thin line is generated, the labeling area may be expanded in the width direction of the thin line, and when a default labeling area of a dot labeling line or a small circle labeling line is determined, the labeling area may be expanded with the dot or the small circle as the center, so as to generate a labeling area that may include a preset minimum operation area.
According to the embodiment of the application, the image overlaying layer is added on the demonstration graphical interface, when a key instruction of the first key is received, the marking line is drawn on the image overlaying layer, after the marking line is drawn, the size of the marking line is calculated, the size of the marking line is compared with a preset first threshold value, if the size of the marking line is smaller than the first threshold value, the marking line is deleted, or a marking area which can contain a preset minimum operation area is set for the marking line. The mark line is drawn on an added image superposition layer, so that the mark line can be added to any data played by software. In addition, a marking line can be directly drawn on the image superposition layer through a key instruction of the first key, so that the marking operation can be simplified; and when the size of the marking line is smaller than the first threshold value, the marking line is directly deleted, or a marking area which can contain a preset minimum operation area is arranged for the marking line, so that the deleting operation is simpler and more convenient.
In order to further optimize the labeling control method described in the present application, after the labeling line drawing is completed, the mode of the digital light spot may be switched to an indication mode, or may also be switched to a blank state.
In order to further optimize the labeling control method described in this application, if the digital light spot is an indication light spot and the indication light spot is in the labeling area of the existing labeling line, different display styles can be adopted for the labeling line where the indication light spot is located, for example, the display color of the labeling line where the indication light spot is located can be changed, or the shape of the labeling line where the indication light spot is located can be changed. Or, the display style of the marked area of the marked line is also changed, the marked area is not displayed on the graphical interface at ordinary times, and when the indication light point enters, the outer frame of the marked area or the whole marked area can be displayed in a certain color. The optimization is used for prompting the speaker that the indication light point enters an effective operation area of a marking line, and corresponding operation can be carried out.
In a further preferred embodiment, if the digital light spot is detected as the indication light spot, the indication light spot is located inside the labeling area of the labeling line, and a click command or a double click command sent by the first key of the handheld device is detected, the labeling line may be deleted.
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. 4 is a schematic diagram of an annotation control apparatus of a wireless presentation device according to an embodiment of the present application, which is detailed as follows:
the wireless presentation device comprises a handheld device, the handheld device comprises a first key, and the labeling control device of the wireless presentation device comprises:
the layer adding unit 401 is configured to add an image overlaying layer on the presentation graphical interface;
a marking line drawing unit 402, configured to receive a key instruction of the first key, and draw a marking line on the image overlay layer according to the key instruction;
a marked line comparing unit 403, configured to calculate a size of the marked line after the marked line is drawn, and compare the size of the marked line with a preset first threshold;
a marked line transformation unit 404, configured to delete the marked line or set a marked area that can include a preset minimum operation area for the marked line if the size of the marked line is smaller than the first threshold.
Preferably, the annotation line drawing unit includes:
the first key detection unit is used for detecting a key instruction of which the pressing time or the touch time of the first key is greater than a first preset time;
the first label drawing unit is used for setting the mode of the digital light spot as a label mode according to the key instruction, displaying a label light spot on a display screen, controlling the label light spot to move according to the movement of the handheld device, and drawing a label line on the image overlaying layer according to the movement of the label light spot;
the first drawing completion unit is used for completing drawing of the marking line and keeping the drawn marking line on the image overlaying layer when a releasing instruction or a touch stopping instruction of the first key is received;
or may comprise, in combination with the above-mentioned,
the second key detection unit is used for receiving a pressing instruction or a clicking instruction of the first key;
the second label drawing unit is used for setting the mode of the digital light spot as a label mode if the mode of the digital light spot is not the label mode when a pressing instruction or a clicking instruction of the first key is received, displaying the label light spot on a display screen, controlling the label light spot to move according to the movement of the handheld device, and drawing a label line on the image overlaying layer according to the movement of the label light spot;
and the second drawing completion unit is used for completing the drawing of the marking line and keeping the drawn marking line on the image superposition layer if the mode of the digital light spot is the marking mode when the pressing instruction or the clicking instruction of the first key is received.
Further, the labeling control device further comprises:
the instruction receiving unit is used for receiving a click instruction or a double-click instruction of the first key when the digital light spot is an indication light spot and is positioned in a marking area of the existing marking line;
and the marking line deleting unit is used for deleting the marking line when receiving the click command or the double click command.
Further, the labeling control device further comprises:
and the style display unit is used for displaying the marking line and/or the marking area thereof in different display styles when the indication light point moves into the marking area of the existing marking line.
The annotation control apparatus of the wireless presentation device illustrated in fig. 4 corresponds to the annotation control method of the wireless presentation device illustrated in fig. 1.
Fig. 5 is a schematic diagram of a wireless presentation device provided by an embodiment of the present application. As shown in fig. 5, wireless presentation device 5 of this embodiment includes: a processor 50, a memory 51 and a computer program 52, such as an annotation control program of a wireless presentation device, stored in said memory 51 and executable on said processor 50. The processor 50, when executing the computer program 52, implements the steps in the above-described embodiments of annotation control methods for wireless presentation devices. Alternatively, the processor 50 implements the functions of the modules/units in the above-described device embodiments when executing the computer program 52.
Illustratively, the computer program 52 may be partitioned into one or more modules/units, which are stored in the memory 51 and executed by the processor 50 to accomplish the present application. The one or more modules/units may be a series of computer program instruction segments capable of performing certain functions that describe the execution of the computer program 52 in the wireless presentation device 5. For example, the computer program 52 may be divided into:
the layer adding unit is used for adding an image superposition layer on the demonstration graphical interface;
the marking line drawing unit is used for receiving a key instruction of the first key and drawing a marking line on the image overlaying layer according to the key instruction;
the marking line comparison unit is used for calculating the size of the marking line after the marking line is drawn, and comparing the size of the marking line with a preset first threshold value;
and the marking line transformation unit is used for deleting the marking line or setting a marking area which can contain a preset minimum operation area for the marking line if the marking line is smaller than the first threshold value.
The wireless presentation device may include, but is not limited to, a processor 50, a memory 51. Those skilled in the art will appreciate that fig. 5 is merely an example of a wireless presentation device 5 and does not constitute a limitation of wireless presentation device 5 and may include more or fewer components than shown, or some components in combination, or different components, e.g., the wireless presentation device may also include input output devices, network access devices, buses, etc.
The Processor 50 may be a Central Processing Unit (CPU), 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, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 51 may be an internal storage unit of the wireless presentation device 5, such as a hard disk, flash memory or memory of the wireless presentation device 5. The memory 51 may also be an external storage device of the wireless presentation device 5, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), or the like provided on the wireless presentation device 5. Further, the memory 51 may also include both an internal storage unit and an external storage device of the wireless presentation device 5. The memory 51 is used for storing the computer programs and other programs and data required by the wireless presentation device. The memory 51 may also be used to temporarily store data that has been output or is to be output.
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.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
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 apparatus/terminal device and method may be implemented in other ways. For example, the above-described embodiments of the apparatus/terminal device are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or 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.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow in the method of the embodiments described above can be realized by a computer program, which can be stored in a computer-readable storage medium and can realize 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: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media which may not include electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.
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 (8)

1. An annotation control method of a wireless presentation device, wherein the wireless presentation device comprises a handheld device including a first key, the annotation control method of the wireless presentation device comprises:
adding an image superposition layer on a demonstration graphical interface;
receiving a key instruction of the first key, and drawing a marking line on the image overlaying layer according to the key instruction;
after the drawing of the marking line is finished, calculating the size of the marking line, and comparing the size of the marking line with a preset first threshold value;
if the size of the marking line is smaller than the first threshold, setting a marking area capable of containing a preset minimum operation area for the marking line, wherein the marking area extends outwards by taking a default marking area as a center until the marking area can contain the minimum operation area, the marking area is an effective area for marking the marking line, the marking line can be operated when a digital light spot is positioned in the marking area of the marking line, the minimum operation area is the minimum area for controlling the digital light spot to move into and complete the operation by a handheld device, and the default marking area is the marking line itself, or the marking line itself extends a circle of covered area, or the area sealed by the marking line, or a rectangular area containing the marking line;
and when the digital light spot is an indication light spot which is positioned in the marking area of the marking line and detects a click command or a double-click command sent by the first key, deleting the marking line.
2. The annotation control method of a wireless presentation device according to claim 1, wherein the step of drawing an annotation line on the image overlay according to the key instruction comprises:
detecting a key instruction of which the pressing time or the touch time of the first key is greater than a first preset time;
setting a mode of a digital light spot as a marking mode according to the key instruction, displaying a marking light spot on a display screen, controlling the marking light spot to move according to the movement of the handheld device, and drawing a marking line on the image overlaying layer according to the movement of the marking light spot;
when a releasing instruction or a touch stopping instruction of the first key is received, drawing the marking line and keeping the drawn marking line on the image overlaying layer;
or may comprise, in combination with the above-mentioned,
receiving a pressing instruction or a clicking instruction of the first key;
when a pressing instruction or a clicking instruction of the first key is received, if the mode of the digital light spot is not the labeling mode, setting the mode of the digital light spot as the labeling mode, displaying a labeling light spot on a display screen, controlling the movement of the labeling light spot according to the movement of the handheld device, and drawing a labeling line on the image overlaying layer according to the movement of the labeling light spot;
and when a pressing instruction or a clicking instruction of the first key is received, if the mode of the digital light spot is the marking mode, finishing the drawing of the marking line and keeping the drawn marking line on the image superposition layer.
3. The annotation control method of a wireless presentation device of claim 1, further comprising:
when the indication light point moves into the marking area of the existing marking line, the marking line and/or the marking area thereof are displayed in different display styles.
4. An annotation control apparatus of a wireless presentation device, the wireless presentation device comprising a handheld device, the handheld device including a first key, the annotation control apparatus of the wireless presentation device comprising:
the layer adding unit is used for adding an image superposition layer on the demonstration graphical interface;
the marking line drawing unit is used for receiving a key instruction of the first key and drawing a marking line on the image overlaying layer according to the key instruction;
the marking line comparison unit is used for calculating the size of the marking line after the marking line is drawn, and comparing the size of the marking line with a preset first threshold value;
a marking line transformation unit, configured to set a marking area that can include a preset minimum operation area for the marking line if the size of the marking line is smaller than the first threshold, where the marking area extends outward around a default marking area until the size of the marking line can include the minimum operation area, the marking area is an effective area for identifying the marking line, the marking line can be operated when a digital light spot is located in the marking area of the marking line, the minimum operation area is a minimum area where the handheld device controls the digital light spot to move in and complete the operation, and the default marking area is the marking line itself, or an area where the marking line itself extends outward and is covered by a circle, or an area where the marking line is closed, or a rectangular area that includes the marking line;
and the deleting unit is used for deleting the marking line when the digital light spot is the indicating light spot and the indicating light spot is positioned in the marking area of the marking line and a click command or a double click command sent by the first key is detected.
5. The annotation control device of a wireless presentation apparatus according to claim 4, wherein the annotation line drawing unit comprises:
the first key detection unit is used for detecting a key instruction of which the pressing time or the touch time of the first key is greater than a first preset time;
the first label drawing unit is used for setting the mode of the digital light spot as a label mode according to the key instruction, displaying a label light spot on a display screen, controlling the label light spot to move according to the movement of the handheld device, and drawing a label line on the image overlaying layer according to the movement of the label light spot;
the first drawing completion unit is used for completing drawing of the marking line and keeping the drawn marking line on the image overlaying layer when a releasing instruction or a touch stopping instruction of the first key is received;
or may comprise, in combination with the above-mentioned,
the second key detection unit is used for receiving a pressing instruction or a clicking instruction of the first key;
the second label drawing unit is used for setting the mode of the digital light spot as a label mode if the mode of the digital light spot is not the label mode when a pressing instruction or a clicking instruction of the first key is received, displaying the label light spot on a display screen, controlling the label light spot to move according to the movement of the handheld device, and drawing a label line on the image overlaying layer according to the movement of the label light spot;
and the second drawing completion unit is used for completing the drawing of the marking line and keeping the drawn marking line on the image superposition layer if the mode of the digital light spot is the marking mode when the pressing instruction or the clicking instruction of the first key is received.
6. The annotation control device of a wireless presentation apparatus of claim 4, further comprising:
and the style display unit is used for displaying the marking line and/or the marking area thereof in different display styles when the indication light point moves into the marking area of the existing marking line.
7. A wireless presentation device comprising a memory, a processor and a computer program stored in said memory and executable on said processor, characterized in that said processor, when executing said computer program, implements the steps of the annotation control method of the wireless presentation device according to any one of claims 1 to 3.
8. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of a method for annotation control of a wireless presentation device as claimed in any one of claims 1 to 3.
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