CN115220638A - Method, device, equipment and storage medium for separating hand and pen of electronic whiteboard - Google Patents
Method, device, equipment and storage medium for separating hand and pen of electronic whiteboard Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 230000001960 triggered effect Effects 0.000 claims abstract description 25
- 238000000926 separation method Methods 0.000 claims abstract description 16
- 238000001514 detection method Methods 0.000 claims abstract description 12
- 238000004590 computer program Methods 0.000 claims description 20
- 230000006870 function Effects 0.000 description 3
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- 241001422033 Thestylus Species 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
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- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
- G06F3/0488—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures
- G06F3/04886—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures by partitioning the display area of the touch-screen or the surface of the digitising tablet into independently controllable areas, e.g. virtual keyboards or menus
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Abstract
The invention discloses a method, a device, equipment and a storage medium for separating a stylus of an electronic whiteboard, wherein the method comprises the steps of performing touch detection on a screen when a stylus separating instruction is received, and acquiring first touch event data when a first touch event is detected to exist, wherein the first touch event data comprises the longest edge value of a touch area and the shortest edge value of the touch area; and judging whether the first touch event is triggered by a finger or not according to the longest edge value and the shortest edge value, if not, responding to the first touch event to carry out writing and drawing, and if so, not responding to the first touch event. Compared with the prior art, the technical scheme of the invention can judge whether the current finger touch is performed or not based on the longest edge value and the shortest edge value of the touch area, and perform subsequent processing based on the judgment result, so that the accuracy of finger touch identification can be improved, and the separation of the pen and the hand can be realized.
Description
Technical Field
The invention relates to the technical field of touch screen technical processing, in particular to a method, a device, equipment and a storage medium for separating a hand pen and a stylus of an electronic whiteboard.
Background
In the current electronic whiteboard, an infrared touch screen is generally adopted, but for the infrared touch screen, a touch track of a touch object on the infrared touch screen can be acquired, but the current touch track cannot be directly distinguished as the current touch track is generated by a touch pen or a finger. In addition, in the prior art, in order to realize the separation of the stylus, the infrared touch screen is replaced by the capacitive touch screen for detection, but the equipment cost of the capacitive touch screen is higher than that of the infrared touch screen.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the method, the device, the equipment and the storage medium for separating the hand pens of the electronic whiteboard are provided, so that the accuracy of finger touch recognition is improved, and the hand pen separation is realized.
In order to solve the above technical problem, the present invention provides a method for separating a stylus of an electronic whiteboard, comprising:
when a stylus separating instruction is received, performing touch detection on a screen, and when a first touch event is detected to exist, acquiring first touch event data, wherein the first touch event data comprises a longest edge value of a touch area and a shortest edge value of the touch area;
and judging whether the first touch event is triggered by a finger or not according to the longest edge value and the shortest edge value, if not, responding to the first touch event to carry out writing and drawing, and if so, not responding to the first touch event.
In a possible implementation manner, determining whether the first touch event is triggered by a finger according to the longest edge value and the shortest edge value specifically includes:
acquiring a preset longest edge threshold and a preset shortest edge threshold;
judging whether the longest edge value is larger than the preset longest edge threshold value or not, and simultaneously judging whether the shortest edge value is larger than the preset shortest edge threshold value or not;
when the longest edge value is larger than the preset longest edge threshold value and the shortest edge value is larger than the preset shortest edge threshold value, judging that the first touch event is triggered by a finger;
and when the longest edge value is not greater than the preset longest edge threshold value and the shortest edge value is not greater than the preset shortest edge threshold value, judging that the first touch event is triggered by the touch pen.
In a possible implementation manner, obtaining the preset longest edge threshold and the preset shortest edge threshold specifically includes:
acquiring a historical touch event data set, wherein the historical touch event data set comprises historical longest edge values of a plurality of historical touch areas and historical shortest edge values of the plurality of historical touch areas;
calculating a first average value of historical longest edge values of a plurality of historical touch areas, and taking the first average value as a preset longest edge threshold value;
and calculating a second average value of historical shortest edge values of the plurality of historical touch areas, and taking the second average value as a preset shortest edge threshold value.
In a possible implementation manner, when it is detected that the first touch event exists, acquiring first touch event data specifically includes:
when a first touch event is detected to exist, traversing all touch points on a screen to obtain all shielded touch points to obtain a touch area;
extracting edge coordinate points of the touch area according to the touch area, combining all the edge coordinate points pairwise, and calculating the distance of each group of coordinate points to obtain a plurality of coordinate distances;
and taking the maximum value in the coordinate distances as the longest edge value of the touch area, and taking the minimum value in the coordinate distances as the shortest edge value of the touch area.
The embodiment of the invention also provides a device for separating the hand pen from the electronic whiteboard, which comprises: the device comprises a first touch event data acquisition module and a first touch event judgment module;
the first touch event data acquisition module is used for performing touch detection on a screen when a stylus separation instruction is received, and acquiring first touch event data when a first touch event is detected to exist, wherein the first touch event data comprises the longest edge value of a touch area and the shortest edge value of the touch area;
and the first touch event judging module is used for judging whether the first touch event is triggered by a finger according to the longest edge value and the shortest edge value, if not, responding to the first touch event to carry out writing and drawing, and if so, not responding to the first touch event.
In a possible implementation manner, the first touch event determining module is configured to determine whether the first touch event is triggered by a finger according to the longest edge value and the shortest edge value, and specifically includes:
acquiring a preset longest edge threshold and a preset shortest edge threshold;
judging whether the longest edge value is larger than the preset longest edge threshold value or not, and judging whether the shortest edge value is larger than the preset shortest edge threshold value or not;
when the longest edge value is larger than the preset longest edge threshold value and the shortest edge value is larger than the preset shortest edge threshold value, judging that the first touch event is finger triggering;
and when the longest edge value is not greater than the preset longest edge threshold value and the shortest edge value is not greater than the preset shortest edge threshold value, judging that the first touch event is triggered by the touch pen.
In a possible implementation manner, the first touch event determining module is configured to obtain a preset longest edge threshold and a preset shortest edge threshold, and specifically includes:
obtaining a historical touch event data set, wherein the historical touch event data set comprises historical longest edge values of a plurality of historical touch areas and historical shortest edge values of the plurality of historical touch areas;
calculating a first average value of historical longest edge values of a plurality of historical touch areas, and taking the first average value as a preset longest edge threshold value;
and calculating a second average value of historical shortest edge values of the plurality of historical touch areas, and taking the second average value as a preset shortest edge threshold value.
In a possible implementation manner, the first touch event data acquiring module is configured to acquire first touch event data when it is detected that a first touch event exists, and specifically includes:
when a first touch event is detected, traversing all touch points on a screen to obtain all shielded touch points and obtain a touch area;
extracting edge coordinate points of the touch area according to the touch area, combining all the edge coordinate points pairwise, and calculating the distance of each group of coordinate points to obtain a plurality of coordinate distances;
and taking the maximum value in the coordinate distances as the longest edge value of the touch area, and taking the minimum value in the coordinate distances as the shortest edge value of the touch area.
An embodiment of the present invention further provides a terminal device, which includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, where the processor, when executing the computer program, implements the method for separating a stylus from an electronic whiteboard according to any one of the above mentioned items.
The embodiment of the present invention further provides a computer-readable storage medium, where the computer-readable storage medium includes a stored computer program, and when the computer program runs, the apparatus where the computer-readable storage medium is located is controlled to execute the method for separating a stylus from a whiteboard according to any of the above mentioned items.
Compared with the prior art, the method, the device, the equipment and the storage medium for separating the hand and the pen of the electronic whiteboard have the following beneficial effects that:
when a stylus separating instruction is received, performing touch detection on a screen, and when a first touch event is detected to exist, acquiring first touch event data, wherein the first touch event data comprises a longest edge value of a touch area and a shortest edge value of the touch area; and judging whether the first touch event is triggered by a finger or not according to the longest edge value and the shortest edge value, if not, responding to the first touch event to carry out writing and drawing, and if so, not responding to the first touch event. Compared with the prior art, the technical scheme of the invention can judge whether the current finger touch is the finger touch or not based on the longest edge value and the shortest edge value of the touch area, and carry out subsequent processing based on the judgment result, thereby improving the accuracy of finger touch identification, realizing stylus separation and simultaneously improving the use experience of a user.
Drawings
Fig. 1 is a schematic flowchart of an embodiment of a method for separating a stylus from an electronic whiteboard according to the present invention;
fig. 2 is a schematic structural diagram of an embodiment of a hand-pen separating device of an electronic whiteboard provided in the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and the above, below, exceeding, etc. are understood as excluding the present numbers, and the above, below, within, etc. are understood as including the present numbers. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
Example 1
Referring to fig. 1, fig. 1 is a schematic flowchart of an embodiment of a method for separating a pen from a hand of an electronic whiteboard provided by the present invention, as shown in fig. 1, the method includes steps 101 to 102, which are specifically as follows:
step 101: the method comprises the steps of performing touch detection on a screen when a stylus separating instruction is received, and acquiring first touch event data when a first touch event is detected to exist, wherein the first touch event data comprises the longest edge value of a touch area and the shortest edge value of the touch area.
In one embodiment, when the screen is written, the screen needs to be touched, so that when a stylus separation instruction is received, touch detection is performed on the screen, wherein the set screen is an infrared touch screen, and compared with an existing capacitive touch screen, the cost of equipment can be reduced.
In one embodiment, when the screen is touched and detected, a touch area is detected and positioned based on infrared matrixes in X and Y directions on the screen, specifically, a circuit board outer frame is arranged in front of a display of the infrared touch screen, infrared transmitting tubes and infrared receiving tubes are distributed on four sides of the screen of the circuit board, and the infrared matrixes which are crossed horizontally and vertically are formed in a one-to-one correspondence manner; when a user touches the screen, a finger or a touch pen can block two infrared rays passing through the position, so that the position of a touch point on the screen can be judged. Therefore, in this embodiment, all the occluded touch points are obtained by traversing all the touch points on the screen, so as to obtain the touch area.
Preferably, the present embodiment may further obtain the touch area of the first touch event ACTION _ DOWN based on the getSize () method of the android system.
In an embodiment, according to the touch area, performing edge detection on the touch area to obtain an edge image of the touch area, and after obtaining the edge image of the touch area, determining whether the edge image is a single closed edge image, if so, determining that a first touch event generates a single first touch area, and if not, generating a plurality of touch areas for the first touch event.
In one embodiment, edge coordinate points of a single closed edge image are extracted to obtain a plurality of edge coordinate points, all the edge coordinate points are combined pairwise to obtain a plurality of coordinate groups, and the distance of the coordinate points between each coordinate group is calculated to obtain a plurality of coordinate distances; and taking the maximum value in the coordinate distances as the longest edge value of the touch area, and taking the minimum value in the coordinate distances as the shortest edge value of the touch area. Preferably, in this embodiment, corresponding edge coordinate points may be extracted simultaneously for a plurality of closed edge images.
Preferably, the generated touch area is an elliptical area, the obtained shortest side value of the touch area is a value of the shortest side of the elliptical area, and the obtained longest side value of the touch area is a value of the longest side of the elliptical area.
Preferably, the embodiment may also directly obtain the longest edge value and the shortest edge value of the touch area based on an interface method provided by a MotionEvent touch event of the android system, where getTouchMajor () obtains the longest edge value and getTouchMinor () obtains the shortest edge value.
Step 102: and judging whether the first touch event is triggered by a finger or not according to the longest edge value and the shortest edge value, if not, responding to the first touch event to carry out writing and drawing, and if so, not responding to the first touch event.
In one embodiment, a historical touch event data set is obtained, wherein the historical touch event data set comprises historical longest edge values of a plurality of historical touch areas and historical shortest edge values of the plurality of historical touch areas; calculating a first average value of historical longest edge values of a plurality of historical touch areas, and taking the first average value as a preset longest edge threshold value; and calculating a second average value of historical shortest edge values of the plurality of historical touch areas, and taking the second average value as a preset shortest edge threshold value.
Preferably, the preset longest edge threshold and the preset shortest edge threshold in this embodiment may also be customized according to experience.
In one embodiment, after acquiring a preset longest edge threshold and a preset shortest edge threshold; whether the longest edge value is larger than the preset longest edge threshold value or not is also judged, and whether the shortest edge value is larger than the preset shortest edge threshold value or not is also judged; when the longest edge value is larger than the preset longest edge threshold value and the shortest edge value is larger than the preset shortest edge threshold value, judging that the first touch event is triggered by a finger; and when the longest edge value is not greater than the preset longest edge threshold value and the shortest edge value is not greater than the preset shortest edge threshold value, judging that the first touch event is triggered by the touch pen.
In one embodiment, when the first touch event is detected to be a finger trigger, the response to the first touch event needs to be stopped, and subsequent writing and drawing are not performed, that is, the writing of the finger needs to be limited; when the first touch event is detected to be triggered by the touch pen, the response to the first touch event is maintained, a drawing track is generated by acquiring the touch contour of the first touch event, and subsequent writing and drawing are performed, so that the effect of separating the pen from the hand is achieved.
Preferably, when a plurality of touch areas are generated by a first touch event, each touch area is judged at the same time, writing limitation is performed on the touch area triggered by the first touch event in the plurality of touch areas, and writing drawing is performed on the touch area triggered by the first touch event in the plurality of touch areas, so that the condition that the touch areas generated by the finger and the touch pen are the same touch area under the condition that the finger and the touch pen generate the touch areas on the screen at the same time is avoided, and false detection on the touch areas is caused.
Example 2
Referring to fig. 2, fig. 2 is a schematic structural diagram of an embodiment of a device for separating a pen from a hand of an electronic whiteboard provided in the present invention, as shown in fig. 2, the device includes a first touch event data acquisition module 201 and a first touch event determination module 202, which are specifically as follows:
the first touch event data obtaining module 201 is configured to perform touch detection on a screen when a stylus separation instruction is received, and obtain first touch event data when a first touch event is detected to exist, where the first touch event data includes a longest edge value of a touch area and a shortest edge value of the touch area.
The first touch event determining module 202 is configured to determine whether the first touch event is triggered by a finger according to the longest edge value and the shortest edge value, if not, respond to the first touch event to perform writing and drawing, and if so, not respond to the first touch event.
In an embodiment, the first touch event determining module 202 is configured to determine whether the first touch event is triggered by a finger according to the longest edge value and the shortest edge value, and specifically includes: acquiring a preset longest edge threshold and a preset shortest edge threshold; judging whether the longest edge value is larger than the preset longest edge threshold value or not, and simultaneously judging whether the shortest edge value is larger than the preset shortest edge threshold value or not; when the longest edge value is larger than the preset longest edge threshold value and the shortest edge value is larger than the preset shortest edge threshold value, judging that the first touch event is finger triggering; and when the longest edge value is not greater than the preset longest edge threshold value and the shortest edge value is not greater than the preset shortest edge threshold value, judging that the first touch event is triggered by the touch pen.
In an embodiment, the first touch event determining module 202 is configured to obtain a preset longest edge threshold and a preset shortest edge threshold, and specifically includes: obtaining a historical touch event data set, wherein the historical touch event data set comprises historical longest edge values of a plurality of historical touch areas and historical shortest edge values of the plurality of historical touch areas; calculating a first average value of historical longest edge values of a plurality of historical touch areas, and taking the first average value as a preset longest edge threshold value; and calculating a second average value of historical shortest edge values of the plurality of historical touch areas, and taking the second average value as a preset shortest edge threshold value.
In an embodiment, the first touch event data acquiring module 201 is configured to acquire first touch event data when detecting that a first touch event exists, and specifically includes: when a first touch event is detected to exist, all the shielded touch points are obtained by traversing all the touch points on the screen to obtain a touch area; extracting edge coordinate points of the touch area according to the touch area, combining all the edge coordinate points pairwise, and calculating the distance of each group of coordinate points to obtain a plurality of coordinate distances; and taking the maximum value in the coordinate distances as the longest edge value of the touch area, and taking the minimum value in the coordinate distances as the shortest edge value of the touch area.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working process of the apparatus described above may refer to the corresponding process in the foregoing method embodiment, and is not described herein again.
It should be noted that the above-mentioned embodiment of the device for separating a pen from a stylus of an electronic whiteboard is merely illustrative, wherein the modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical units, that is, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
On the basis of the above-mentioned embodiment of the method for separating the hand and the pen from the electronic whiteboard, another embodiment of the present invention provides a terminal device for separating the hand and the pen from the electronic whiteboard, where the terminal device for separating the hand and the pen from the electronic whiteboard includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, and when the processor executes the computer program, the method for separating the hand and the pen from the electronic whiteboard according to any one of the embodiments of the present invention is implemented.
Illustratively, the computer program may be partitioned in this embodiment into one or more modules that are stored in the memory and executed by the processor to implement the invention. The one or more modules may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution process of the computer program in the pen-and-stylus separation terminal device of the electronic whiteboard.
The hand-pen separation terminal device of the electronic whiteboard can be a desktop computer, a notebook, a palm computer, a cloud server and other computing devices. The pen-stylus separation terminal device of the electronic whiteboard can comprise, but is not limited to, a processor and a memory.
The Processor 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. The general purpose processor may be a microprocessor or the processor may be any conventional processor or the like, the processor being the control center of the whiteboard's stylus-splitting terminal device, the various parts of the whiteboard's stylus-splitting terminal device being connected by various interfaces and lines.
The memory may be configured to store the computer program and/or module, and the processor may implement various functions of the whiteboard pen-separation terminal device by running or executing the computer program and/or module stored in the memory and calling data stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function, and the like; the storage data area may store data created according to the use of the mobile phone, and the like. In addition, the memory may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.
On the basis of the above embodiment of the method for separating the handwriting of the electronic whiteboard, another embodiment of the present invention provides a storage medium, where the storage medium includes a stored computer program, and when the computer program runs, the apparatus on which the storage medium is located is controlled to execute the method for separating the handwriting of the electronic whiteboard according to any one of the embodiments of the present invention.
In this embodiment, the storage medium is a computer-readable storage medium, and the computer program includes computer program code, which may be in source code form, object code form, executable file or some intermediate form, and so on. 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 suitable additions or subtractions depending on the requirements of legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer-readable media may not include electrical carrier signals or telecommunication signals in accordance with legislation and patent practice.
In summary, the present invention discloses a method, an apparatus, a device, and a storage medium for separating a stylus of an electronic whiteboard, where the method performs touch detection on a screen when receiving a stylus separation instruction, and acquires first touch event data when detecting that a first touch event exists, where the first touch event data includes a longest edge value of a touch area and a shortest edge value of the touch area; and judging whether the first touch event is triggered by a finger or not according to the longest edge value and the shortest edge value, if not, responding to the first touch event to carry out writing and drawing, and if so, not responding to the first touch event. Compared with the prior art, the technical scheme of the invention can judge whether the current finger touch is performed or not based on the longest edge value and the shortest edge value of the touch area, and perform subsequent processing based on the judgment result, so that the accuracy of finger touch identification can be improved, and the separation of the pen and the hand can be realized.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. A method for separating a stylus of an electronic whiteboard is characterized by comprising the following steps:
when a stylus separation instruction is received, performing touch detection on a screen, and when a first touch event is detected to exist, acquiring first touch event data, wherein the first touch event data comprises the longest edge value of a touch area and the shortest edge value of the touch area;
and judging whether the first touch event is triggered by a finger or not according to the longest edge value and the shortest edge value, if not, responding to the first touch event to carry out writing and drawing, and if so, not responding to the first touch event.
2. The method for separating a stylus from a whiteboard of claim 1, wherein determining whether the first touch event is triggered by a finger according to the longest edge value and the shortest edge value specifically comprises:
acquiring a preset longest edge threshold and a preset shortest edge threshold;
judging whether the longest edge value is larger than the preset longest edge threshold value or not, and judging whether the shortest edge value is larger than the preset shortest edge threshold value or not;
when the longest edge value is larger than the preset longest edge threshold value and the shortest edge value is larger than the preset shortest edge threshold value, judging that the first touch event is finger triggering;
and when the longest edge value is not greater than the preset longest edge threshold value and the shortest edge value is not greater than the preset shortest edge threshold value, judging that the first touch event is triggered by the touch pen.
3. The method for separating the handwriting from the electronic whiteboard of claim 1, wherein obtaining the preset longest edge threshold and the preset shortest edge threshold specifically comprises:
obtaining a historical touch event data set, wherein the historical touch event data set comprises historical longest edge values of a plurality of historical touch areas and historical shortest edge values of the plurality of historical touch areas;
calculating a first average value of historical longest edge values of a plurality of historical touch areas, and taking the first average value as a preset longest edge threshold value;
and calculating a second average value of historical shortest edge values of the plurality of historical touch areas, and taking the second average value as a preset shortest edge threshold value.
4. The method for separating a stylus of an electronic whiteboard according to claim 1, wherein when detecting that the first touch event exists, acquiring the first touch event data specifically comprises:
when a first touch event is detected to exist, all the shielded touch points are obtained by traversing all the touch points on the screen to obtain a touch area;
extracting edge coordinate points of the touch area according to the touch area, combining all the edge coordinate points pairwise, and calculating the distance of each group of coordinate points to obtain a plurality of coordinate distances;
and taking the maximum value in the coordinate distances as the longest edge value of the touch area, and taking the minimum value in the coordinate distances as the shortest edge value of the touch area.
5. A hand-pen separating device of an electronic whiteboard is characterized by comprising: the device comprises a first touch event data acquisition module and a first touch event judgment module;
the first touch event data acquisition module is used for performing touch detection on a screen when a stylus separation instruction is received, and acquiring first touch event data when a first touch event is detected to exist, wherein the first touch event data comprises the longest edge value of a touch area and the shortest edge value of the touch area;
and the first touch event judging module is used for judging whether the first touch event is triggered by a finger according to the longest edge value and the shortest edge value, if not, responding to the first touch event to carry out writing and drawing, and if so, not responding to the first touch event.
6. The device for separating a pen from a hand of an electronic whiteboard of claim 5, wherein the first touch event determining module is configured to determine whether the first touch event is triggered by a finger according to the longest edge value and the shortest edge value, and specifically includes:
acquiring a preset longest edge threshold and a preset shortest edge threshold;
judging whether the longest edge value is larger than the preset longest edge threshold value or not, and simultaneously judging whether the shortest edge value is larger than the preset shortest edge threshold value or not;
when the longest edge value is larger than the preset longest edge threshold value and the shortest edge value is larger than the preset shortest edge threshold value, judging that the first touch event is finger triggering;
and when the longest edge value is not greater than the preset longest edge threshold value and the shortest edge value is not greater than the preset shortest edge threshold value, judging that the first touch event is triggered by the touch pen.
7. The device for separating a stylus from a whiteboard of claim 6, wherein the first touch event determining module is configured to obtain a preset longest edge threshold and a preset shortest edge threshold, and specifically includes:
obtaining a historical touch event data set, wherein the historical touch event data set comprises historical longest edge values of a plurality of historical touch areas and historical shortest edge values of the plurality of historical touch areas;
calculating a first average value of historical longest edge values of a plurality of historical touch areas, and taking the first average value as a preset longest edge threshold value;
and calculating a second average value of historical shortest edge values of the plurality of historical touch areas, and taking the second average value as a preset shortest edge threshold value.
8. The device as claimed in claim 5, wherein the first touch event data acquiring module is configured to acquire the first touch event data when detecting that the first touch event exists, and specifically includes:
when a first touch event is detected to exist, all the shielded touch points are obtained by traversing all the touch points on the screen to obtain a touch area;
extracting edge coordinate points of the touch area according to the touch area, combining all the edge coordinate points pairwise, and calculating the distance of each group of coordinate points to obtain a plurality of coordinate distances;
and taking the maximum value in the coordinate distances as the longest edge value of the touch area, and taking the minimum value in the coordinate distances as the shortest edge value of the touch area.
9. A terminal device comprising a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, the processor when executing the computer program implementing the method of hand-pen separation of an electronic whiteboard of any of claims 1 to 4.
10. A computer-readable storage medium, comprising a stored computer program, wherein the computer program, when executed, controls an apparatus in which the computer-readable storage medium is located to perform the method of separating a stylus of an electronic whiteboard according to any one of claims 1 to 4.
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