CN112835497A - Method and device for quickly entering electronic whiteboard and storage medium - Google Patents
Method and device for quickly entering electronic whiteboard and storage medium Download PDFInfo
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Abstract
The invention discloses a method for quickly entering an electronic whiteboard, which is applied to all-in-one machine equipment and comprises the steps of firstly, recording coordinate values of touch points when a screen of the all-in-one machine equipment is touched, simultaneously recording touch time of the touch points, entering a standby operation state by a system until the touch time is more than preset touch time, executing a track acquisition step, and marking the touch points as original touch points; then obtaining the motion track of the continuous operation of the finger or the writing pen of the user on the all-in-one machine equipment within a preset time period; finally, identifying the type of the motion trail, and switching the all-in-one machine equipment into an electronic whiteboard writing state when the identification result meets the preset requirement; and when the identification result does not meet the preset requirement, the system exits the state to be operated. The method and the device are simple to operate, the all-in-one machine equipment is conveniently and quickly switched to the writing state of the electronic whiteboard, and the convenience in operation of a user is improved. The invention also discloses a device and a storage medium for rapidly entering the electronic whiteboard.
Description
Technical Field
The invention relates to an electronic whiteboard of an all-in-one machine, in particular to a method, a device and a storage medium for rapidly entering the electronic whiteboard.
Background
At present, due to the writing characteristic of the electronic whiteboard, the electronic whiteboard is generally externally connected to the all-in-one machine equipment to realize writing of characters. However, when the all-in-one machine device is switched to the electronic whiteboard, a specific action is generally required to be operated on the all-in-one machine device to enter a writing interface for selecting entering the electronic whiteboard, for example, after a user touches a corresponding position of a screen through a finger, an operation interface is called, and then the user clicks a corresponding button to enter whiteboard software, so as to switch to the electronic whiteboard, or after the user exits from a current interface and returns to a desktop, the user clicks the whiteboard software to switch to the electronic whiteboard.
Disclosure of Invention
In order to overcome the defects of the prior art, one of the objectives of the present invention is to provide a method for quickly entering an electronic whiteboard, which can solve the problem that the operation is complicated when an all-in-one device switches the electronic whiteboard in the prior art.
The second purpose of the present invention is to provide a device for quickly entering an electronic whiteboard, which can solve the problem of complicated operation when the electronic whiteboard is switched by the all-in-one machine in the prior art.
The invention further aims to provide a storage medium, which can solve the problem that the operation is complicated when the electronic whiteboard is switched by the all-in-one machine equipment in the prior art.
One of the purposes of the invention is realized by adopting the following technical scheme:
a method for rapidly entering an electronic whiteboard is applied to all-in-one machine equipment, and comprises the following steps:
the starting steps are as follows: when the screen of the all-in-one machine device is touched, recording coordinate values of touch points, and simultaneously recording touch time of the touch points, wherein the system enters a standby operation state until the touch time is greater than preset touch time, and the touch points are marked as original touch points;
a track acquisition step: acquiring a motion track of continuous operation of a finger or a writing pen of a user on a screen of the all-in-one machine equipment within a preset time period;
and a step of identifying switching: identifying the motion trail, and switching the all-in-one machine equipment into an electronic whiteboard writing state when the identification result meets the preset requirement; and when the identification result does not meet the preset requirement, the system exits the state to be operated.
Further, the preset touch time is 1 second.
Further, when the preset requirement is the first preset requirement, the identifying and switching step further includes:
a first acquisition step: acquiring coordinate values of touch points in sequence at intervals of a preset interval within a preset time period;
a first sequencing step: sequencing the touch points according to the sequence of the acquisition time of the touch points to obtain a sequencing result;
a first distance calculating step: sequentially taking out each touch point according to the sequencing result, and calculating the distance between each touch point and the original touch point;
a first judgment step: judging the distance between each touch point and the original touch point is greater than the distance between the previous touch point and the original touch point according to the sequence of the touch points in the sequencing result, and if so, executing an included angle calculation step; judging whether any touch point exists according to the sequence of the touch points in the sequencing result, and if the distance between the touch point and the original touch point is smaller than the distance between the previous touch point and the original touch point, the system exits the state to be operated;
and (3) an included angle calculation step: sequentially calculating the included angle between the line segment formed by each touch point and the previous touch point and the coordinate axis according to the sequence of the touch points in the sequencing result, calculating the included angle between the line segment formed by each touch point and the next touch point and the coordinate axis, and marking the corresponding touch point as a turning point when the types of the two included angles are different; wherein the type of included angle includes acute and obtuse angles;
a first switching step: judging whether the number of the turning points is greater than or equal to a preset number, if so, switching the all-in-one machine equipment into an electronic whiteboard writing state; if not, the system exits the standby operation state.
Further, the preset interval period is 20 ms.
Further, the preset number is 3.
Further, when the preset requirement is a second preset requirement, the identifying and switching step further includes:
a second acquisition step: acquiring coordinate values of touch points in sequence at intervals of a preset interval within a preset time period;
a second sorting step: sequencing the touch points according to the sequence of the acquisition time of the touch points to obtain a sequencing result;
a recording step: sequentially taking out each touch point according to the sequence of the touch points in the sequencing result, and recording as the current touch point;
a second distance calculating step: calculating the distance between the current touch point and the original touch point and the distance between the previous touch point and the original touch point;
a second judgment step: judging according to the sequence of the touch points in the sequencing result to obtain that if the distance between the current touch point and the original touch point is greater than the distance between the previous touch point and the original touch point, continuously taking out the next touch point from the sequencing result and recording the next touch point as the current touch point, and executing the distance calculation step until all the touch points in the sequencing result are traversed and the system exits from the state to be operated when the distance between each touch point and the original touch point is greater than the distance between the previous touch point and the original touch point; judging according to the sequence of the touch points in the sequencing result to obtain that if the distance between the current touch point and the original touch point is smaller than the distance between the previous touch point and the original touch point, executing a third judgment step;
a third judging step: and sequentially taking out each rest touch point according to the sequence of the touch points in the sequencing result: when the distance between any touch point and the original touch point is larger than the distance between the previous touch point and the original touch point, the system exits the state to be operated; when the distance between each touch point and the original touch point is smaller than the distance between the previous touch point and the original touch point, executing a radius calculation step;
and (3) radius calculation: selecting a touch point from the sequencing result, calculating the radius R of the motion trail according to the distance between the touch point and the original touch point, and marking the touch point as a middle touch point;
calculating the circle center: calculating a coordinate value of the circle center of the running track according to the coordinate value of the middle touch point and the coordinate value of the original touch point;
a third distance calculating step: selecting the front touch point and the rear three touch points of the middle touch point according to the sequence of the touch points in the sequencing result, and respectively calculating the distances L' between the front touch point and the rear three touch points and the circle center; a second switching step: judging whether m is smaller than or equal to a preset threshold value, if so, switching the all-in-one machine equipment into an electronic whiteboard writing state; if not, the system exits the state to be operated; wherein
Further, the preset interval time is 50 ms; the preset threshold is 30%.
Further, the preset time period is 1 second.
The second purpose of the invention is realized by adopting the following technical scheme:
an apparatus for fast entry into an electronic whiteboard, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the computer program is a fast entry into the electronic whiteboard program, and the processor implements the steps of a method for fast entry into an electronic whiteboard as one of the objects of the present invention when executing the fast entry into the electronic whiteboard program.
The third purpose of the invention is realized by adopting the following technical scheme:
a storage medium being a computer readable storage medium having stored thereon a computer program being a fast entry program for an electronic whiteboard, the program for a fast entry into an electronic whiteboard being executed by a processor for carrying out the steps of a method of a fast entry into an electronic whiteboard as employed in one of the objects of the present invention.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the integrated machine equipment is quickly switched into the writing state of the electronic whiteboard by adopting a mode that a finger or a stylus of a user long presses and draws a specific motion track on the screen of the integrated machine.
Drawings
Fig. 1 is a flowchart of a method for quickly entering an electronic whiteboard according to the present invention;
fig. 2 is a flowchart of step S4 in fig. 1 when the motion trajectory satisfies a first preset requirement;
fig. 3 is a schematic diagram of positions of each touch point and an original touch point when a motion trajectory meets a first preset requirement;
fig. 4 is a flowchart of step S4 in fig. 1 when the motion trajectory satisfies a second preset requirement;
fig. 5 is a schematic position diagram of each touch point and an original touch point when the motion trajectory meets a second preset requirement;
fig. 6 is a flowchart of an apparatus for quickly entering an electronic whiteboard according to the present invention.
In the figure: 11. a memory; 12. a processor; 13. a communication bus; 14. a network interface.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.
The invention provides a method for quickly entering an electronic whiteboard in all-in-one machine equipment, the all-in-one machine equipment can be switched to a writing state of the electronic whiteboard after a user only needs to make a specific motion track on a screen of the all-in-one machine through a finger or a stylus, and the method is simple to operate and higher in convenience.
As shown in fig. 1, the present invention provides a method for quickly entering an electronic whiteboard, comprising the following steps:
and step S1, when the screen of the all-in-one machine device is touched, acquiring an interface touch signal, obtaining coordinate values of a touch point, and recording the touch time of the touch point.
And step S2, when the touch time of the touch point reaches the preset touch time, recording the touch point as an original touch point, and enabling the system to enter a standby operation state.
Specifically, when a user needs to switch to the writing state of the electronic whiteboard, the user can press the screen of the all-in-one machine device through a finger or a stylus pen at any position of the screen of the all-in-one machine device or the interface needing to be annotated, when the preset touch time is reached, the user thinks that the user wants to switch to the writing state of the electronic whiteboard, the system enters the state to be switched, and then the action of the user is identified to judge whether the user enters the writing state of the electronic whiteboard.
And if the touch time of the touch point is less than the preset touch time, the system does not perform any action or execute other operations.
Preferably, the preset touch time is 1 second. Wherein the coordinate values of the touch points are represented by (x, y).
And step S3, acquiring the motion track of the continuous operation of the finger or the stylus of the user on the all-in-one machine device in a preset time period.
The invention judges whether the all-in-one machine equipment is switched to the electronic whiteboard by identifying the motion track of the finger or the stylus of the user on the screen of the all-in-one machine equipment. Specifically, a user finger or a stylus draws a corresponding graph on the screen of the all-in-one machine device, so that the system can identify a motion track corresponding to the graph, and whether the electronic whiteboard is switched or not can be judged according to the motion track.
Step S4, identifying the type of the motion trail, and switching the all-in-one machine equipment into an electronic whiteboard writing state when the identification result meets the preset requirement; and when the identification result does not meet the preset requirement, the system exits the state to be operated. More preferably, the preset time period is 1 second.
That is, in a preset time period, when a user draws a motion track meeting the preset requirements of the system on the screen of the all-in-one machine equipment, the all-in-one machine equipment can be switched to the writing state of the electronic whiteboard.
Preferably, the present invention combines the simplicity of practical operation and the operation habit of the user to set the following two preferred embodiments to describe how to identify the operation trajectory.
As shown in fig. 2 and 3, when the motion trajectory meets the first preset requirement, the system is switched to the writing state of the electronic whiteboard, and step S4 specifically includes:
and step S11, sequentially acquiring coordinate values of the touch points at preset intervals in a preset time period.
More preferably, the preset time in the present embodiment is 1 second. The preset interval time is 20 ms. Wherein, the smaller the preset interval time is, the more accurate the motion track identification is.
And step S12, sequencing the touch points according to the sequence of the acquisition time of the touch points to obtain a sequencing result.
And step S13, sequentially taking out each touch point according to the sequencing result, and calculating the distance between each touch point and the original touch point.
Preferably, in combination with the actual operation of the user, the present embodiment considers that the convenience of operation is higher when the user draws a wavy line. Therefore, according to the characteristics of the wavy lines, such as the distance between each touch point and the original touch point, which is acquired in sequence along with the motion trajectory, is larger and larger, and the wavy lines have inflection points, etc., in this embodiment, a first preset requirement is set according to the characteristics, and when the motion trajectory drawn by the user meets the first preset requirement, the electronic whiteboard is considered to be switched to the writing state. That is, the following steps S14 to S16 are performed to determine whether the motion trajectory meets the first preset requirement, specifically:
step S14, judging whether the distance between each touch point and the original touch point is larger than the distance between the previous touch point and the original touch point according to the sequence of the touch points in the sequencing result, if so, executing step S15; if not, the system exits the standby operation state.
Assuming that the number of touch points acquired within the preset time is N, the coordinate value of the nth touch point is represented by (x)n,yn). Wherein N is equal to [1, N ∈]And n denotes an order of acquiring touch points within a preset time period.
Setting the coordinate value of the original touch point as (x)0,y0)，The distance between each touch point and the original touch point is marked as L.
The distance from the original touch point to the nth touch point is represented as Ln：
Then the previous touch point of the nth touch point, that is, the nth-1 touch point, the distance between the touch point obtained last time and the original touch point, that is, the distance between the touch point obtained last time and the original touch point obtained last time, is recorded as Ln-1：
Sequentially judging each touch point according to the acquisition sequence of the touch points in a preset time period, wherein each touch point meets the conditions that: l isn>Ln-1，n∈[1，N]If the distance L is considered to be continuously increased according to the sequence of the acquisition time of the touch points, the next judgment can be performed; if the motion trajectory does not meet the first preset requirement, the system directly exits the state to be operated.
As shown in fig. 3, the original touch point is set to be O, and the touch points sequentially acquired at preset intervals are A, B, C, D, E, F, H, I, J, K.
As can be seen from the figure, within the preset time period, the distance from each touch point to the original touch point is greater than the distance from the previous touch point to the original touch point, and then the next operation is continued. On the contrary, if the distance between the acquired touch point and the original touch point is smaller than the distance between the previous touch point and the original touch point within the preset time period, the current motion track within the preset time period is considered to be not in accordance with the first preset requirement, and the system directly exits from the state to be operated.
Step S15, sequentially calculating the included angle between the line segment formed by each touch point and the previous touch point and the coordinate axis according to the sequence of the touch points in the sequencing result, calculating the included angle between the line segment formed by each touch point and the next touch point and the coordinate axis, and marking the corresponding touch point as a turning point when the types of the two included angles are different; wherein the types of included angles include acute angles and obtuse angles.
Preferably, the coordinate axis is an X-axis or a Y-axis. The inflection point in the motion trail can be judged according to the type of the included angle between the line segment formed by the touch points and the coordinate axis, and is also called as a turning point.
In an actual application process, when a touch point is obtained, the touch point is not necessarily coincident with the peak point P, so that in this embodiment, only one touch point with an included angle different from that of the same coordinate axis needs to be found, and the touch point is used as a turning point to determine the shape of the wavy line. Specifically, for example, for the touch point B, an included angle between a line segment AB formed by the touch point B and the previous touch point a and the coordinate axis X is an acute angle, and an included angle between a line segment BC formed by the touch point B and the next touch point C and the coordinate axis X is an obtuse angle, the touch point B is considered as a turning point.
And if the included angle between the line segment CB formed by the touch point C and the touch point B and the coordinate axis X is an obtuse angle and the included angle between the line segment CD formed by the touch point C and the touch point D and the coordinate axis X is not an obtuse angle, the touch point C is not a turning point.
Similarly, it can be found that the touch point D is a turning point, the touch point F is a turning point, the touch point I is a turning point, and the touch point J is a turning point.
In addition, the coordinate axis in this embodiment is a coordinate system established with the original touch point as the origin, and in an actual application process, the establishment of the coordinate system may be set according to an actual situation.
Step S16, judging whether the number of the turning points is larger than a preset number, if so, switching the all-in-one machine equipment into a writing state of the electronic whiteboard; if not, the system exits the standby operation state. In this embodiment, when the number of turning points is greater than 3, the currently drawn running track is considered to be a wavy line, and the all-in-one machine equipment is switched to enter the electronic whiteboard.
In order to accurately recognize the shape of the motion trajectory, the present embodiment sets at least 3 turning points.
Preferably, when the motion trajectory satisfies the second preset requirement, as shown in fig. 4 and 5, the step S4 further includes:
and step S21, sequentially acquiring coordinate values of the touch points at preset intervals in a preset time period. Preferably, the preset interval time is 50 ms.
As shown in FIG. 5, the touch points are A, B, C, D, E, F, G, H respectively, and the original touch point is O.
And step S22, sequencing the touch points according to the sequence of the acquisition time of the touch points to obtain a sequencing result.
And step S23, sequentially taking out each touch point according to the sequence of the touch points in the sequencing result, and recording the touch points as the current touch points.
And step S24, calculating the distance between the current touch point and the original touch point and the distance between the previous touch point and the original touch point.
For example, the distance between each touch point and the original touch point is respectively: LAO, LBO, LCO, LDO, LEO, LFO, LGO, LHO.
And step 251, judging according to the sequence of the touch points in the sequencing result, if the distance between the current touch point and the original touch point is greater than the distance between the previous touch point and the original touch point, continuing to take out the next touch point from the sequencing result and recording the next touch point as the current touch point, and executing step 24 until the system exits from the standby operation state after all the touch points in the sequencing result are traversed and the distance between each touch point and the original touch point is greater than the distance between the previous touch point and the original touch point.
Step S252, if it is determined according to the sequence of the touch points in the sorting result that the distance between the current touch point and the original touch point is smaller than the distance between the previous touch point and the original touch point, step S261 or step S262 is executed.
Preferably, in an actual operation process, if the user draws a perfect circle, the user is difficult to operate, and therefore, the second preset requirement is set according to the circular characteristics, for example, the distance between the touch point and the original touch point, which is obtained according to the sequence of the touch points, is continuously increased and then is continuously decreased, and whether the motion trajectory is close to the perfect circle or not is judged according to the radius and the circle center.
Step S261, sequentially taking out each of the remaining touch points according to the sequence of the touch points in the sorting result: and when the distance between any touch point and the original touch point is larger than the distance between the previous touch point and the original touch point, the system exits the standby operation state.
And S262, sequentially taking out each remaining touch point according to the sequence of the touch points in the sequencing result, and executing the step S27 when the distance between each touch point and the original touch point is smaller than the distance between the previous touch point and the original touch point.
Similarly, when the distances between the plurality of touch points and the original touch point are continuously increased, then decreased and then increased, the motion trajectory is considered to be not in accordance with the second preset requirement, and the system exits the standby operation state.
Step S27, selecting a touch point from the sorting result, and calculating a radius R of the motion trajectory according to the distance between the touch point and the original touch point, and marking the touch point as a middle touch point.
And step S28, calculating the coordinate value of the center of the circle of the running track according to the coordinate value of the middle touch point and the coordinate value of the original touch point.
Setting a touch point M when the distance between the touch point and the original touch point is maximum, wherein the coordinate value is (x)M,yM) The coordinate value of the original touch point O is (x0, y 0).
The distance between the touch point and the original touch point is LM。
The radius R is equal to LM/2。
The coordinate value of the center of the circle is
And step S29, selecting the front touch point and the rear three touch points of the middle touch point according to the sequence of the touch points in the sequencing result, and respectively calculating the distances L' between the front touch point and the center of the circle.
Wherein,
step S30, judging whether m is smaller than or equal to a preset threshold value, if yes, switching the all-in-one machine equipment into an electronic whiteboard writing state; if not, the system exits the state to be operated; wherein
And L' is the distance between the previous touch point of the middle touch point and the center of the circle or the distance between any one of the last three touch points of the middle touch point and the center of the circle.
Wherein the preset threshold is 30%. According to different preset thresholds, the recognition precision can be changed correspondingly. The magnitude of this value of m determines whether the motion trajectory is close to a circle or an ellipse. When the value is smaller, the running locus is closer to a circle. In the actual operation process, the motion trail drawn by the user is difficult to approach to the perfect circle, so for the convenience of user operation, the system requirement can be considered to be met as long as the motion trail approaches to the perfect circle. In addition, the movement locus in the present embodiment is not necessarily a closed circle, but may be a large semicircular shape larger than 1/2 as long as the determination conditions given in the present embodiment are satisfied.
The method is convenient to operate, and the all-in-one machine equipment can be quickly switched into the writing state of the electronic whiteboard and a writing interface only by a mode that a user presses and draws the running track with a specific shape for a long time without multiple operations of the user, so that the mode accords with the habit of the user.
Example two
The invention provides a device for quickly entering an electronic whiteboard. As shown in fig. 6, an internal structure of an apparatus for quickly accessing an electronic whiteboard according to an embodiment of the present invention is schematically illustrated.
In this embodiment, an apparatus for quickly entering an electronic whiteboard may be a PC (Personal Computer), or may be a terminal device such as a smart phone, a tablet Computer, or a portable Computer. The device for quickly entering the electronic whiteboard at least comprises: a processor 12, a communication bus 13, a network interface 14, and a memory 11.
The memory 11 includes at least one type of readable storage medium, which includes a flash memory, a hard disk, a multimedia card, a card type memory (e.g., SD or DX memory, etc.), a magnetic memory, a magnetic disk, an optical disk, and the like. The memory 11 may in some embodiments be an internal storage unit of a fast entry device to the electronic whiteboard, for example a hard disk of the fast entry device to the electronic whiteboard. The memory 11 may also be an external storage device of a device for fast access to the electronic whiteboard in other embodiments, such as a plug-in hard disk provided on a device for fast access to the electronic whiteboard, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like. Further, the memory 11 may also include both an internal storage unit and an external storage device of an apparatus for quick access to an electronic whiteboard. The memory 11 can be used not only for storing application software installed in an apparatus for quick entry into an electronic whiteboard and various types of data, such as codes of a program for quick entry into an electronic whiteboard, etc., but also for temporarily storing data that has been output or is to be output.
The processor 12, which in some embodiments may be a Central Processing Unit (CPU), controller, microcontroller, microprocessor or other data Processing chip, is configured to execute program code stored in the memory 11 or process data, such as executing a program that quickly enters an electronic whiteboard.
The communication bus 13 is used to realize connection communication between these components.
The network interface 14 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface), and is typically used to establish a communication link between the one type of quick entry electronic whiteboard device and other electronic devices.
Optionally, the apparatus for quickly entering into an electronic whiteboard may further include an employee interface, where the employee interface may include a Display (Display), an input unit such as a Keyboard (Keyboard), and the optional employee interface may further include a standard wired interface and a wireless interface. Alternatively, in some embodiments, the display may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, an OLED (Organic Light-Emitting Diode) touch device, or the like. The display, which may also be referred to as a display screen or display unit, is suitable for displaying information processed in a device for quick access to an electronic whiteboard and for displaying a visual staff interface.
While fig. 6 shows only one fast entry electronic whiteboard device having components 11-14 and a procedure for fast entry into the electronic whiteboard, it will be appreciated by those skilled in the art that the structure shown in fig. 6 does not constitute a limitation of a fast entry electronic whiteboard device and may include fewer or more components than shown, or some components in combination, or a different arrangement of components.
In an embodiment of the apparatus for fast entry into an electronic whiteboard shown in fig. 6, a program for fast entry into the electronic whiteboard is stored in the memory 11; the processor 12, when executing the program for fast entry into the electronic whiteboard stored in the memory 11, implements the following steps:
the starting steps are as follows: when the screen of the all-in-one machine device is touched, recording coordinate values of touch points, and simultaneously recording touch time of the touch points, wherein the system enters a standby operation state until the touch time is greater than preset touch time, and the touch points are marked as original touch points;
a track acquisition step: acquiring a motion track of continuous operation of a finger or a writing pen of a user on a screen of the all-in-one machine equipment within a preset time period;
and a step of identifying switching: identifying the motion trail, and switching the all-in-one machine equipment into an electronic whiteboard writing state when the identification result meets the preset requirement; and when the identification result does not meet the preset requirement, the system exits the state to be operated.
Further, the preset touch time is 1 second.
Further, when the preset requirement is the first preset requirement, the identifying and switching step further includes:
a first acquisition step: acquiring coordinate values of touch points in sequence at intervals of a preset interval within a preset time period;
a first sequencing step: sequencing the touch points according to the sequence of the acquisition time of the touch points to obtain a sequencing result;
a first distance calculating step: sequentially taking out each touch point according to the sequencing result, and calculating the distance between each touch point and the original touch point;
a first judgment step: judging the distance between each touch point and the original touch point is greater than the distance between the previous touch point and the original touch point according to the sequence of the touch points in the sequencing result, and if so, executing an included angle calculation step; judging whether any touch point exists according to the sequence of the touch points in the sequencing result, and if the distance between the touch point and the original touch point is smaller than the distance between the previous touch point and the original touch point, the system exits the state to be operated;
and (3) an included angle calculation step: sequentially calculating the included angle between the line segment formed by each touch point and the previous touch point and the coordinate axis according to the sequence of the touch points in the sequencing result, calculating the included angle between the line segment formed by each touch point and the next touch point and the coordinate axis, and marking the corresponding touch point as a turning point when the types of the two included angles are different; wherein the type of included angle includes acute and obtuse angles;
a first switching step: judging whether the number of the turning points is greater than or equal to a preset number, if so, switching the all-in-one machine equipment into an electronic whiteboard writing state; if not, the system exits the standby operation state.
Further, the preset interval period is 20 ms.
Further, the preset number is 3.
Further, when the preset requirement is a second preset requirement, the identifying and switching step further includes:
a second acquisition step: acquiring coordinate values of touch points in sequence at intervals of a preset interval within a preset time period;
a second sorting step: sequencing the touch points according to the sequence of the acquisition time of the touch points to obtain a sequencing result;
a recording step: sequentially taking out each touch point according to the sequence of the touch points in the sequencing result, and recording as the current touch point;
a second distance calculating step: calculating the distance between the current touch point and the original touch point and the distance between the previous touch point and the original touch point;
a second judgment step: judging according to the sequence of the touch points in the sequencing result to obtain that if the distance between the current touch point and the original touch point is greater than the distance between the previous touch point and the original touch point, continuously taking out the next touch point from the sequencing result and recording the next touch point as the current touch point, and executing the distance calculation step until all the touch points in the sequencing result are traversed and the system exits from the state to be operated when the distance between each touch point and the original touch point is greater than the distance between the previous touch point and the original touch point; judging according to the sequence of the touch points in the sequencing result to obtain that if the distance between the current touch point and the original touch point is smaller than the distance between the previous touch point and the original touch point, executing a third judgment step;
a third judging step: and sequentially taking out each rest touch point according to the sequence of the touch points in the sequencing result: when the distance between any touch point and the original touch point is larger than the distance between the previous touch point and the original touch point, the system exits the state to be operated; when the distance between each touch point and the original touch point is smaller than the distance between the previous touch point and the original touch point, executing a radius calculation step;
and (3) radius calculation: selecting a touch point from the sequencing result, calculating the radius R of the motion trail according to the distance between the touch point and the original touch point, and marking the touch point as a middle touch point;
calculating the circle center: calculating a coordinate value of the circle center of the running track according to the coordinate value of the middle touch point and the coordinate value of the original touch point;
a third distance calculating step: selecting the previous touch of the middle touch point according to the sequence of the touch points in the sequencing resultTouching a point and the last three touch points, and respectively calculating the distance L' between the point and the circle center; a second switching step: judging whether m is smaller than or equal to a preset threshold value, if so, switching the all-in-one machine equipment into an electronic whiteboard writing state; if not, the system exits the state to be operated; wherein
Further, the preset interval time is 50 ms; the preset threshold is 30%.
Further, the preset time period is 1 second.
EXAMPLE III
The invention also provides a storage medium which is a computer readable storage medium and is stored with a computer program, wherein the computer program is a program for rapidly entering the electronic whiteboard; when being executed by a processor, the program for rapidly entering the electronic whiteboard realizes the following steps:
the starting steps are as follows: when the screen of the all-in-one machine device is touched, recording coordinate values of touch points, and simultaneously recording touch time of the touch points, wherein the system enters a standby operation state until the touch time is greater than preset touch time, and the touch points are marked as original touch points;
a track acquisition step: acquiring a motion track of continuous operation of a finger or a writing pen of a user on a screen of the all-in-one machine equipment within a preset time period;
and a step of identifying switching: identifying the motion trail, and switching the all-in-one machine equipment into an electronic whiteboard writing state when the identification result meets the preset requirement; and when the identification result does not meet the preset requirement, the system exits the state to be operated.
Further, the preset touch time is 1 second.
Further, when the preset requirement is the first preset requirement, the identifying and switching step further includes:
a first acquisition step: acquiring coordinate values of touch points in sequence at intervals of a preset interval within a preset time period;
a first sequencing step: sequencing the touch points according to the sequence of the acquisition time of the touch points to obtain a sequencing result;
a first distance calculating step: sequentially taking out each touch point according to the sequencing result, and calculating the distance between each touch point and the original touch point;
a first judgment step: judging the distance between each touch point and the original touch point is greater than the distance between the previous touch point and the original touch point according to the sequence of the touch points in the sequencing result, and if so, executing an included angle calculation step; judging whether any touch point exists according to the sequence of the touch points in the sequencing result, and if the distance between the touch point and the original touch point is smaller than the distance between the previous touch point and the original touch point, the system exits the state to be operated;
and (3) an included angle calculation step: sequentially calculating the included angle between the line segment formed by each touch point and the previous touch point and the coordinate axis according to the sequence of the touch points in the sequencing result, calculating the included angle between the line segment formed by each touch point and the next touch point and the coordinate axis, and marking the corresponding touch point as a turning point when the types of the two included angles are different; wherein the type of included angle includes acute and obtuse angles;
a first switching step: judging whether the number of the turning points is greater than or equal to a preset number, if so, switching the all-in-one machine equipment into an electronic whiteboard writing state; if not, the system exits the standby operation state.
Further, the preset interval period is 20 ms.
Further, the preset number is 3.
Further, when the preset requirement is a second preset requirement, the identifying and switching step further includes:
a second acquisition step: acquiring coordinate values of touch points in sequence at intervals of a preset interval within a preset time period;
a second sorting step: sequencing the touch points according to the sequence of the acquisition time of the touch points to obtain a sequencing result;
a recording step: sequentially taking out each touch point according to the sequence of the touch points in the sequencing result, and recording as the current touch point;
a second distance calculating step: calculating the distance between the current touch point and the original touch point and the distance between the previous touch point and the original touch point;
a second judgment step: judging according to the sequence of the touch points in the sequencing result to obtain that if the distance between the current touch point and the original touch point is greater than the distance between the previous touch point and the original touch point, continuously taking out the next touch point from the sequencing result and recording the next touch point as the current touch point, and executing the distance calculation step until all the touch points in the sequencing result are traversed and the system exits from the state to be operated when the distance between each touch point and the original touch point is greater than the distance between the previous touch point and the original touch point; judging according to the sequence of the touch points in the sequencing result to obtain that if the distance between the current touch point and the original touch point is smaller than the distance between the previous touch point and the original touch point, executing a third judgment step;
a third judging step: and sequentially taking out each rest touch point according to the sequence of the touch points in the sequencing result: when the distance between any touch point and the original touch point is larger than the distance between the previous touch point and the original touch point, the system exits the state to be operated; when the distance between each touch point and the original touch point is smaller than the distance between the previous touch point and the original touch point, executing a radius calculation step;
and (3) radius calculation: selecting a touch point from the sequencing result, calculating the radius R of the motion trail according to the distance between the touch point and the original touch point, and marking the touch point as a middle touch point;
calculating the circle center: calculating a coordinate value of the circle center of the running track according to the coordinate value of the middle touch point and the coordinate value of the original touch point;
a third distance calculating step: selecting the front touch point and the rear three touch points of the middle touch point according to the sequence of the touch points in the sequencing result, and respectively calculating the distances L' between the front touch point and the rear three touch points and the circle center; a second switching step: judging whether m is less than or equal to a preset threshold value, if so,switching the all-in-one machine equipment into an electronic whiteboard writing state; if not, the system exits the state to be operated; wherein
Further, the preset interval time is 50 ms; the preset threshold is 30%.
Further, the preset time period is 1 second.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (10)
1. A method for rapidly entering an electronic whiteboard is applied to all-in-one machine equipment, and is characterized by comprising the following steps:
the starting steps are as follows: when the screen of the all-in-one machine device is touched, recording coordinate values of touch points, and simultaneously recording touch time of the touch points, wherein the system enters a standby operation state until the touch time is greater than preset touch time, and the touch points are marked as original touch points;
a track acquisition step: acquiring a motion track of continuous operation of a finger or a writing pen of a user on a screen of the all-in-one machine equipment within a preset time period;
and a step of identifying switching: identifying the motion trail, and switching the all-in-one machine equipment into an electronic whiteboard writing state when the identification result meets the preset requirement; and when the identification result does not meet the preset requirement, the system exits the state to be operated.
2. A method for quickly entering an electronic whiteboard according to claim 1, wherein the preset touch time is 1 second.
3. The method according to claim 1, wherein when the preset requirement is the first preset requirement, the step of identifying and switching further comprises:
a first acquisition step: acquiring coordinate values of touch points in sequence at intervals of a preset interval within a preset time period;
a first sequencing step: sequencing the touch points according to the sequence of the acquisition time of the touch points to obtain a sequencing result;
a first distance calculating step: sequentially taking out each touch point according to the sequencing result, and calculating the distance between each touch point and the original touch point;
a first judgment step: judging the distance between each touch point and the original touch point is greater than the distance between the previous touch point and the original touch point according to the sequence of the touch points in the sequencing result, and if so, executing an included angle calculation step; judging whether any touch point exists according to the sequence of the touch points in the sequencing result, and if the distance between the touch point and the original touch point is smaller than the distance between the previous touch point and the original touch point, the system exits the state to be operated;
and (3) an included angle calculation step: sequentially calculating the included angle between the line segment formed by each touch point and the previous touch point and the coordinate axis according to the sequence of the touch points in the sequencing result, calculating the included angle between the line segment formed by each touch point and the next touch point and the coordinate axis, and marking the corresponding touch point as a turning point when the types of the two included angles are different; wherein the type of included angle includes acute and obtuse angles;
a first switching step: judging whether the number of the turning points is greater than or equal to a preset number, if so, switching the all-in-one machine equipment into an electronic whiteboard writing state; if not, the system exits the standby operation state.
4. A method of quickly entering an electronic whiteboard according to claim 3, wherein the preset interval time period is 20 ms.
5. A method of quickly entering an electronic whiteboard according to claim 3, wherein the preset number is 3.
6. The method according to claim 1, wherein when the preset requirement is a second preset requirement, the step of identifying and switching further comprises:
a second acquisition step: acquiring coordinate values of touch points in sequence at intervals of a preset interval within a preset time period;
a second sorting step: sequencing the touch points according to the sequence of the acquisition time of the touch points to obtain a sequencing result;
a recording step: sequentially taking out each touch point according to the sequence of the touch points in the sequencing result, and recording as the current touch point;
a second distance calculating step: calculating the distance between the current touch point and the original touch point and the distance between the previous touch point and the original touch point;
a second judgment step: judging according to the sequence of the touch points in the sequencing result to obtain that if the distance between the current touch point and the original touch point is greater than the distance between the previous touch point and the original touch point, continuously taking out the next touch point from the sequencing result and recording the next touch point as the current touch point, and executing the distance calculation step until all the touch points in the sequencing result are traversed and the system exits from the state to be operated when the distance between each touch point and the original touch point is greater than the distance between the previous touch point and the original touch point; judging according to the sequence of the touch points in the sequencing result to obtain that if the distance between the current touch point and the original touch point is smaller than the distance between the previous touch point and the original touch point, executing a third judgment step;
a third judging step: and sequentially taking out each rest touch point according to the sequence of the touch points in the sequencing result: when the distance between any touch point and the original touch point is larger than the distance between the previous touch point and the original touch point, the system exits the state to be operated; when the distance between each touch point and the original touch point is smaller than the distance between the previous touch point and the original touch point, executing a radius calculation step;
and (3) radius calculation: selecting a touch point from the sequencing result, calculating the radius R of the motion trail according to the distance between the touch point and the original touch point, and marking the touch point as a middle touch point;
calculating the circle center: calculating a coordinate value of the circle center of the running track according to the coordinate value of the middle touch point and the coordinate value of the original touch point;
a third distance calculating step: selecting the front touch point and the rear three touch points of the middle touch point according to the sequence of the touch points in the sequencing result, and respectively calculating the distances L' between the front touch point and the rear three touch points and the circle center; a second switching step: judging whether m is smaller than or equal to a preset threshold value, if so, switching the all-in-one machine equipment into an electronic whiteboard writing state; if not, the system exits the state to be operated; wherein
7. A method of quickly entering an electronic whiteboard according to claim 6, wherein the preset interval time is 50 ms; the preset threshold is 30%.
8. A method of quickly entering an electronic whiteboard according to claim 1, wherein the preset time period is 1 second.
9. An apparatus for fast entry into an electronic whiteboard comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program being a fast entry into the electronic whiteboard program, characterized in that: the steps of a method of quick entry into an electronic whiteboard according to any of claims 1 to 8 are implemented when the processor executes the program of quick entry into an electronic whiteboard.
10. A storage medium which is a computer-readable storage medium having stored thereon a computer program which is a program for quickly entering an electronic whiteboard, characterized in that: the program for fast entry into an electronic whiteboard, when executed by a processor, carries out the steps of a method for fast entry into an electronic whiteboard according to any one of claims 1 to 8.
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