CN106610783B - handwriting erasing method and system for infrared touch equipment - Google Patents
handwriting erasing method and system for infrared touch equipment Download PDFInfo
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- CN106610783B CN106610783B CN201611025940.1A CN201611025940A CN106610783B CN 106610783 B CN106610783 B CN 106610783B CN 201611025940 A CN201611025940 A CN 201611025940A CN 106610783 B CN106610783 B CN 106610783B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
- G06F3/0488—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T11/00—2D [Two Dimensional] image generation
- G06T11/80—Creating or modifying a manually drawn or painted image using a manual input device, e.g. mouse, light pen, direction keys on keyboard
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Abstract
The invention relates to a handwriting erasing method and a handwriting erasing system of infrared touch equipment, which are used for acquiring an eraser AGC value, an eraser shielding area and an eraser erasing track when detecting handwriting erasing action on an infrared touch screen. And acquiring the corresponding eraser attribute according to the eraser AGC value and the eraser shielding area. And obtaining the corresponding writing pen attribute according to the corresponding relation between the eraser attribute and the preset corresponding relation, and clearing the writing handwriting corresponding to the writing pen attribute covered by the erasing track of the eraser. When handwriting is erased, after the AGC value of the eraser and the shielding area of the eraser are obtained and the attribute of the eraser is determined, the handwriting corresponding to the attribute of a specific writing pen is erased, different erasers can be distinguished to achieve simultaneous erasing of multiple erasers, the simultaneous erasing and qualitative erasing functions of multiple erasers are achieved, and the operation convenience is improved.
Description
Technical Field
The invention relates to the technical field of touch control, in particular to a handwriting erasing method and system for infrared touch equipment.
Background
The infrared touch device is composed of infrared transmitting and receiving sensing elements arranged on the outer frame of the touch screen, and any touch object can change the infrared rays on the contact points to realize the operation of the touch screen. The touch-operated object (such as a finger) can change the infrared ray of the touch point, and then the infrared ray is converted into the coordinate position of touch control to realize the response of operation.
the traditional handwriting erasing method of the infrared touch equipment is to detect the positions of touch objects at different moments to obtain erasing tracks and erase the handwriting covered by the erasing tracks. Since the handwriting covered by the erasing track is erased uniformly, the handwriting which the user wants to keep is inevitably erased, and the defect of low operation convenience exists.
Disclosure of Invention
In view of the above, it is necessary to provide a handwriting erasing method and system for an infrared touch device, which have high operation convenience.
A handwriting erasing method of an infrared touch device comprises the following steps:
When detecting handwriting erasing action on the infrared touch screen, acquiring an eraser AGC value, an eraser shielding area and an eraser erasing track;
acquiring corresponding eraser attributes according to the eraser AGC value and the eraser shielding area;
obtaining a corresponding writing pen attribute according to the corresponding relation between the eraser attribute and the preset attribute;
and clearing the handwriting corresponding to the attribute of the writing pen covered by the erasing track of the eraser.
An infrared touch device handwriting erasure system comprising:
the erasing information acquisition module is used for acquiring an eraser AGC value, an eraser shielding area and an erasing track of an eraser when detecting handwriting erasing action on the infrared touch screen;
The eraser attribute acquisition module is used for acquiring corresponding eraser attributes according to the eraser AGC value and the eraser shielding area;
the writing pen attribute acquisition module is used for acquiring corresponding writing pen attributes according to the corresponding relation between the eraser attributes and preset attributes;
And the handwriting erasing module is used for emptying the handwriting corresponding to the writing pen attribute covered by the erasing track of the eraser.
according to the handwriting erasing method and system of the infrared touch device, when the handwriting erasing action on the infrared touch screen is detected, the AGC value of the eraser, the shielding area of the eraser and the erasing track of the eraser are obtained. And acquiring the corresponding eraser attribute according to the eraser AGC value and the eraser shielding area. And obtaining the corresponding writing pen attribute according to the corresponding relation between the eraser attribute and the preset corresponding relation, and clearing the writing handwriting corresponding to the writing pen attribute covered by the erasing track of the eraser. When handwriting is erased, after the AGC value of the eraser and the shielding area of the eraser are obtained and the attribute of the eraser is determined, the handwriting corresponding to the attribute of a specific writing pen is erased, different erasers can be distinguished to achieve simultaneous erasing of multiple erasers, the simultaneous erasing and qualitative erasing functions of multiple erasers are achieved, and the operation convenience is improved.
Drawings
FIG. 1 is a flowchart illustrating a handwriting erasure method for an infrared touch device in an embodiment;
FIG. 2 is a flowchart of a handwriting erasing method of an infrared touch device in another embodiment;
FIG. 3 is a block diagram of a handwriting wipe system of an infrared touch device in one embodiment;
FIG. 4 is a block diagram of a handwriting erasing system of an infrared touch device in another embodiment.
Detailed Description
In one embodiment, the handwriting erasing method for the infrared touch device is suitable for the infrared touch-based writable touch device. As shown in fig. 1, the method comprises the steps of:
Step S160: when detecting the handwriting erasing action of the infrared touch screen, acquiring an eraser AGC value, an eraser shielding area and an eraser erasing track.
The specific mode for detecting the handwriting erasing action is not unique, and in the embodiment, the handwriting erasing action on the infrared touch screen is considered to be detected by detecting the contact area between the touch object and the infrared touch screen when the contact area is larger than a preset threshold value, and the touch object is used as an eraser to perform handwriting erasing operation. Conversely, if the contact area is smaller than or equal to the preset threshold, it may be considered that a writing action on the infrared touch screen is detected, and the touch object is taken as a writing pen. The handwriting erasing action is automatically recognized by detecting the contact area of the touch object, so that the operation convenience is improved. It is understood that in other embodiments, the handwriting erasing action and the writing action may be differentiated by inputting a mode selection instruction, for example, after the user clicks a virtual button with an "erasing mode" on the infrared touch screen, the action of the touch object is considered as the handwriting erasing action on the infrared touch screen, that is, the touch object is used as an eraser.
The eraser is scanned, and two elements, namely an Automatic Gain Control (AGC) value and an eraser shielding area, are obtained and are used for subsequently determining the eraser attribute. The eraser can be scanned to obtain the erasing track of the eraser, so that the subsequent handwriting operation can be performed.
specifically, in one embodiment, the acquisition of the eraser AGC value, the eraser blocking area, and the erasing trace of the eraser in step S160 includes steps 162 and 164.
step 162: and infrared light is emitted through an infrared emission tube of the infrared touch equipment to scan the eraser.
The infrared transmitting tube of the infrared touch device is controlled to generate infrared light, the infrared receiving tube receives the corresponding infrared light, an infrared detection net is formed on the surface of the infrared touch screen, and the eraser is scanned so as to obtain relevant data of the eraser.
step 164: and calculating an eraser AGC value, an eraser shielding area and an eraser erasing track according to the receiving power of an infrared receiving tube of the infrared touch equipment.
The meaning represented by the eraser AGC value is not exclusive, and specifically may be used to distinguish eraser erasable handwriting color or handwriting thickness, and the like. When the infrared light emitted by the infrared emission tube is blocked, the receiving power of the infrared receiving tube can be changed, the change amplitude of the receiving power of the infrared receiving tube is different due to the erasers with different AGC values, and the AGC value attribute of the eraser can be correspondingly calculated by monitoring the receiving power of the infrared receiving tube. In this embodiment, the AGC value of the eraser is determined by the transmittance of the eraser, that is, the eraser with different transmittance makes the change range of the receiving power of the infrared receiving tube different, and the corresponding AGC values are also different. It is understood that in other embodiments, the eraser AGC value may be determined by other properties of the eraser.
According to the positions and the distances of the infrared receiving tubes with the changed receiving power, the positions of the erasers and the shielding areas of the erasers can be detected. The positions of the erasers at different moments are obtained through continuous scanning, and the erasing tracks of the erasers can be obtained through smooth connection according to the time sequence.
Step S170: and acquiring the corresponding eraser attribute according to the eraser AGC value and the eraser shielding area.
After the eraser AGC value and the eraser shielding area are obtained through detection, the corresponding eraser attribute can be directly obtained. The eraser attribute specifically includes erasable handwriting color, handwriting thickness, handwriting type and the like, and the specific content is not unique. It can be understood that the content of the eraser attribute is different according to different meanings represented by the eraser AGC value and the eraser shielding area. The setting parameters input by an operator can be received in advance, and the meaning of the AGC value and the eraser shielding area can be set according to the setting parameters, so that the content contained in the eraser attribute can be determined.
Taking the example that the eraser AGC value represents the eraser erasable handwriting color and the eraser blocking area represents the eraser erasable handwriting type, the eraser attribute comprises the erasable handwriting color and the handwriting type. The handwriting colors may specifically include red, blue, yellow, and the like, and the handwriting types may specifically include characters, regular figures, lines, touch points, and the like. The characters specifically include printable chinese, english, numbers, and the like, the regular figures refer to figures with regular shapes derived from the gallery, such as triangles, circles, squares, and the like, and the lines specifically include straight line segments, curved line segments, and the like.
Firstly, determining the erasable handwriting color corresponding to the eraser according to the corresponding relation between the eraser AGC value and a preset numerical range. The corresponding relation between each numerical range and the handwriting color can be stored in advance, and the erasable handwriting color of the eraser can be known according to the numerical range of the AGC value of the eraser. For example, when the eraser AGC value is within one of the value ranges, the device can erase handwriting corresponding to one or more colors, and if the eraser AGC value is greater than a preset upper limit value, the eraser can erase handwriting of all colors. And determining the erasable handwriting type corresponding to the eraser according to the corresponding relation between the eraser shielding area and the preset area value range. For example, when the area covered by the eraser is in one of the area value ranges, the corresponding handwriting or handwriting types can be erased, and if the area covered by the eraser is larger than the preset area upper limit value, the eraser can erase all handwriting types.
Step S180: and obtaining the corresponding attribute of the writing pen according to the corresponding relation between the attribute of the eraser and the preset attribute.
The corresponding relation between the attribute of the eraser and the attribute of the writing pen can be preset, and after the attribute of the eraser is determined, the attribute of the writing pen can be directly obtained according to the corresponding relation. The content included in the attribute of the writing pen is not unique, and specifically includes the handwriting color, the handwriting thickness or the handwriting type. The corresponding relationship between the properties of the eraser and the properties of the writing pen is not unique, and can be one-to-one, one-to-many or many-to-one, that is, one kind of eraser property can erase the writing handwriting generated corresponding to one or more writing pen properties, and the writing handwriting generated by one kind of writing pen property can also be erased by various eraser properties.
Step S190: and clearing the handwriting corresponding to the attribute of the writing pen covered by the erasing track of the eraser.
The handwriting refers to handwriting generated by corresponding pen attributes, and specifically may be characters, figures, line segments, touch points, or the like. After the writing pen attribute corresponding to the eraser attribute is determined, the writing handwriting corresponding to the writing pen attribute in the area covered by the erasing track of the eraser is obtained and erased, and the handwriting qualitative erasing function aiming at the specific attribute is realized. For example, for a drawn blue circle and a drawn blue radius, when the radius needs to be erased to reserve the circle, the blue radius can be erased to reserve the blue circle by selecting an eraser with the property of erasing the blue handwriting and the line handwriting.
According to the handwriting erasing method of the infrared touch equipment, when handwriting erasing is carried out, after the AGC value of the eraser and the shielding area of the eraser are obtained and the attribute of the eraser is determined, the erasing is carried out on the handwriting corresponding to the attribute of the specific writing pen, the erasing of multiple erasers can be realized by distinguishing different erasers, the erasing and qualitative erasing functions of multiple erasers are realized, and the operation convenience is improved.
in one embodiment, as shown in fig. 2, before step S160, the infrared touch device handwriting erasing method further includes steps S130 to S150.
Step S130: and when the writing action on the infrared touch screen is detected, obtaining an AGC value of the writing pen and the moving track of the writing pen.
in this embodiment, the writing action on the infrared touch screen is considered to be detected when the contact area is smaller than or equal to the preset threshold value by detecting the contact area between the touch object and the infrared touch screen, and the touch object is used as the writing pen. The writing action is automatically recognized by detecting the contact area of the touch object, so that the operation convenience is improved.
The eraser is scanned to obtain the pen AGC value for subsequent determination of pen attributes. The eraser can be scanned to obtain the erasing track of the eraser, so that the note display operation can be performed subsequently. The meaning represented by the AGC value of the writing pen is not unique, and specifically, the meaning can be used for distinguishing the color or thickness of the handwriting that can be written by the writing pen. In this embodiment, the pen AGC value is determined by the transmittance of the pen.
Step S140: and acquiring the corresponding attribute of the writing pen according to the AGC value of the writing pen.
the contents contained in the pen attributes are different according to different meanings represented by the pen AGC values. The setting parameters input by an operator can be received in advance, and the meaning of the AGC value of the writing pen is set according to the setting parameters, so that the content contained in the attribute of the writing pen is determined.
Taking the example that the writing pen AGC value represents the writable handwriting color of the writing pen, the writable handwriting color of the writing pen is determined according to the corresponding relation between the writing pen AGC value and the preset numerical value range. For example, when the AGC value of the writing pen is in one of the numerical value ranges, the writing pen can write handwriting corresponding to one color, and therefore the attribute of the writing pen is determined.
Step S150: and generating writing handwriting to be displayed on the infrared touch screen according to the writing pen attribute and the moving track of the writing pen, and storing the corresponding relation between the writing handwriting and the writing pen attribute.
And after the attribute of the writing pen is determined, generating writing handwriting according to the moving track on the infrared touch screen for displaying, and finishing the writing operation. For example, when the attribute of the writing pen is determined to be blue handwriting and the moving track forms a triangle, a blue triangle is displayed on the infrared touch screen, and the displayed triangle can be overlapped with the moving track or not overlapped with the moving track. And storing the corresponding relation between the writing handwriting and the attribute of the writing pen so as to obtain the writing handwriting generated by the attribute of the writing pen during erasing, thereby improving the operation convenience.
In one embodiment, before step S180, the infrared touch device handwriting erasing method further includes step 110 and step 120.
step 110: and displaying the attribute setting interface and receiving the attribute setting parameters acting on the attribute setting interface.
step 110 may be before step S130, or after step S130. And displaying an attribute setting interface on the infrared touch screen, and inputting attribute setting parameters by an operator through touch operation on the infrared touch screen. The specific content of the attribute setting parameter is not unique, and taking qualitative erasing of handwriting with different colors as an example, the attribute setting parameter may include a numerical range of an eraser AGC value and a corresponding erasable handwriting color, and a numerical range of a writing pen AGC value and a corresponding writable handwriting color.
Step 120: and establishing a corresponding relation between the attribute of the eraser and the attribute of the writing pen according to the attribute setting parameters and storing the corresponding relation.
Firstly, establishing corresponding eraser attribute and writing pen attribute according to attribute setting parameters. For example, for an erasable handwriting color corresponding to a certain value range of the eraser AGC value is blue, an eraser attribute of an erasable blue handwriting is correspondingly established; and if the erasable handwriting color corresponding to a certain value range of the eraser AGC value comprises blue and red, establishing an eraser attribute for erasing the blue handwriting and the red handwriting correspondingly, and so on. The way of establishing the pen attribute is to establish a pen attribute of a pen color corresponding to a data range of the pen AGC value.
And after the eraser attribute and the writing pen attribute are obtained, establishing a corresponding relation between the eraser attribute and the writing pen attribute and storing the corresponding relation. For example, the pen attribute A can write blue handwriting, the pen attribute B can write red handwriting, the pen attribute C can write yellow handwriting, the eraser attribute X can erase blue handwriting, the eraser attribute Y can erase blue and red handwriting, and the eraser attribute Z can erase blue, red and yellow handwriting. The correspondence of the eraser attribute X to the pen attribute a, the correspondence of the eraser attribute Y to the pen attributes a and B, and the correspondence of the eraser attribute Z to the pen attributes A, B and C are established and stored.
It can be understood that the specific manner of establishing the corresponding relationship may be different according to different actual requirements. By pre-establishing and storing the corresponding relation between the attribute of the eraser and the attribute of the writing pen, the subsequent handwriting qualitative erasing is facilitated, and the operation convenience is improved.
in one embodiment, the handwriting erasing system of the infrared touch device is suitable for the infrared touch-based writable touch device. As shown in fig. 3, the system includes an erasure information acquiring module 160, an eraser attribute acquiring module 170, a writing pen attribute acquiring module 180, and a writing script erasing module 190.
The erasing information obtaining module 160 is configured to obtain an eraser AGC value, an eraser blocking area, and an erasing track of an eraser when detecting a handwriting erasing action on the infrared touch screen.
In the embodiment, the handwriting erasing action on the infrared touch screen is considered to be detected by detecting the contact area between the touch object and the infrared touch screen when the contact area is larger than a preset threshold value, and the touch object is used as an eraser to perform handwriting erasing operation. Conversely, if the contact area is smaller than or equal to the preset threshold, it may be considered that a writing action on the infrared touch screen is detected, and the touch object is taken as a writing pen. The handwriting erasing action is automatically recognized by detecting the contact area of the touch object, so that the operation convenience is improved.
And scanning the eraser, and acquiring two elements of an eraser AGC value and an eraser shielding area for subsequent determination of the eraser attribute. The eraser can be scanned to obtain the erasing track of the eraser, so that the subsequent handwriting operation can be performed.
specifically, in one embodiment, the erasure information acquisition module 160 includes a data scanning unit and a data processing unit.
the data scanning unit is used for emitting infrared light through an infrared emitting tube of the infrared touch equipment to scan the eraser when detecting handwriting erasing action on the infrared touch screen.
The infrared transmitting tube of the infrared touch device is controlled to generate infrared light, the infrared receiving tube receives the corresponding infrared light, an infrared detection net is formed on the surface of the infrared touch screen, and the eraser is scanned so as to obtain relevant data of the eraser.
the data processing unit is used for calculating an eraser AGC value, an eraser shielding area and an eraser track according to the receiving power of an infrared receiving tube of the infrared touch equipment.
The meaning represented by the eraser AGC value is not exclusive, and specifically may be used to distinguish eraser erasable handwriting color or handwriting thickness, and the like. When the infrared light emitted by the infrared emission tube is blocked, the receiving power of the infrared receiving tube can be changed, the change amplitude of the receiving power of the infrared receiving tube is different due to the erasers with different AGC values, and the AGC value attribute of the eraser can be correspondingly calculated by monitoring the receiving power of the infrared receiving tube. In the present embodiment, the eraser AGC value is determined by the transmittance of the eraser.
According to the positions and the distances of the infrared receiving tubes with the changed receiving power, the positions of the erasers and the shielding areas of the erasers can be detected. The positions of the erasers at different moments are obtained through continuous scanning, and the erasing tracks of the erasers can be obtained through smooth connection according to the time sequence.
the eraser attribute acquiring module 170 is configured to acquire a corresponding eraser attribute according to the eraser AGC value and the eraser shielding area.
After the eraser AGC value and the eraser shielding area are obtained through detection, the corresponding eraser attribute can be directly obtained. The eraser attribute specifically includes erasable handwriting color, handwriting thickness, handwriting type and the like, and the specific content is not unique. The setting parameters input by an operator can be received in advance, and the meaning of the AGC value and the eraser shielding area can be set according to the setting parameters, so that the content contained in the eraser attribute can be determined.
The writing pen attribute obtaining module 180 is configured to obtain a corresponding writing pen attribute according to the corresponding relationship between the eraser attribute and the preset attribute.
the corresponding relation between the attribute of the eraser and the attribute of the writing pen can be preset, and after the attribute of the eraser is determined, the attribute of the writing pen can be directly obtained according to the corresponding relation. The content included in the attribute of the writing pen is not unique, and specifically includes the handwriting color, the handwriting thickness or the handwriting type. The correspondence between the properties of the eraser and the properties of the pen is not unique, and may be one-to-one, one-to-many, or many-to-one.
The handwriting erasing module 190 is configured to clear the handwriting corresponding to the pen attribute covered by the erasing trace of the eraser.
The handwriting refers to handwriting generated by corresponding pen attributes, and specifically may be characters, figures, line segments, touch points, or the like. After the writing pen attribute corresponding to the eraser attribute is determined, the writing handwriting corresponding to the writing pen attribute in the area covered by the erasing track of the eraser is obtained and erased, and the handwriting qualitative erasing function aiming at the specific attribute is realized.
According to the handwriting erasing system of the infrared touch equipment, when handwriting erasing is carried out, after the AGC value of the eraser and the shielding area of the eraser are obtained and the attribute of the eraser is determined, the erasing is carried out on the handwriting corresponding to the attribute of the specific writing pen, the erasing of multiple erasers can be realized by distinguishing different erasers, the erasing and qualitative erasing functions of multiple erasers are realized, and the operation convenience is improved.
In one embodiment, as shown in fig. 4, the infrared touch device handwriting erasing system further includes a writing information acquiring module 130, a writing pen property acquiring module 140, and a writing handwriting displaying module 150.
The writing information obtaining module 130 is configured to obtain the AGC value of the writing pen and the moving track of the writing pen when detecting a writing action on the infrared touch screen before the erasing information obtaining module 160 obtains the AGC value of the eraser, the eraser blocking area, and the erasing track of the eraser.
In this embodiment, the writing action on the infrared touch screen is considered to be detected when the contact area is smaller than or equal to the preset threshold value by detecting the contact area between the touch object and the infrared touch screen, and the touch object is used as the writing pen. The writing action is automatically recognized by detecting the contact area of the touch object, so that the operation convenience is improved.
The eraser is scanned to obtain the pen AGC value for subsequent determination of pen attributes. The eraser can be scanned to obtain the erasing track of the eraser, so that the note display operation can be performed subsequently. The meaning represented by the AGC value of the writing pen is not unique, and specifically, the meaning can be used for distinguishing the color or thickness of the handwriting that can be written by the writing pen. In this embodiment, the pen AGC value is determined by the transmittance of the pen.
The pen attribute acquiring module 140 is configured to acquire a corresponding pen attribute according to the pen AGC value.
The contents contained in the pen attributes are different according to different meanings represented by the pen AGC values. The setting parameters input by an operator can be received in advance, and the meaning of the AGC value of the writing pen is set according to the setting parameters, so that the content contained in the attribute of the writing pen is determined.
The handwriting display module 150 is configured to generate handwriting for display on the infrared touch screen according to the attribute of the writing pen and the moving trajectory of the writing pen, and store a corresponding relationship between the handwriting and the attribute of the writing pen.
and after the attribute of the writing pen is determined, generating writing handwriting according to the moving track on the infrared touch screen for displaying, and finishing the writing operation. And storing the corresponding relation between the writing handwriting and the attribute of the writing pen so as to obtain the writing handwriting generated by the attribute of the writing pen during erasing, thereby improving the operation convenience.
In one embodiment, the handwriting erasing system of the infrared touch device further comprises a setting parameter acquiring module and an attribute relation storing module.
The setting parameter obtaining module is configured to display an attribute setting interface before the pen attribute obtaining module 180 obtains the corresponding pen attribute according to the corresponding relationship between the eraser attribute and the preset attribute, and receive the attribute setting parameter applied to the attribute setting interface. And displaying an attribute setting interface on the infrared touch screen, and inputting attribute setting parameters by an operator through touch operation on the infrared touch screen.
And the attribute relation storage module is used for establishing and storing the corresponding relation between the attribute of the eraser and the attribute of the writing pen according to the attribute setting parameters. Firstly, establishing corresponding eraser attribute and writing pen attribute according to attribute setting parameters. And after the eraser attribute and the writing pen attribute are obtained, establishing a corresponding relation between the eraser attribute and the writing pen attribute and storing the corresponding relation.
it can be understood that the specific manner of establishing the corresponding relationship may be different according to different actual requirements. By pre-establishing and storing the corresponding relation between the attribute of the eraser and the attribute of the writing pen, the subsequent handwriting qualitative erasing is facilitated, and the operation convenience is improved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
the above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A handwriting erasing method of an infrared touch device is suitable for a writable touch device based on infrared touch, and is characterized by comprising the following steps:
when detecting handwriting erasing action on the infrared touch screen, acquiring an eraser AGC value, an eraser shielding area and an eraser erasing track;
Acquiring corresponding eraser attributes according to the eraser AGC value and the eraser shielding area;
Obtaining a corresponding writing pen attribute according to the corresponding relation between the eraser attribute and the preset attribute;
And clearing the handwriting corresponding to the attribute of the writing pen covered by the erasing track of the eraser.
2. The infrared touch device handwriting erasing method according to claim 1, wherein said step of obtaining an eraser AGC value, an eraser blocking area and an eraser erasing track comprises the steps of:
The eraser is scanned by emitting infrared light through an infrared emission tube of infrared touch equipment;
and calculating the AGC value of the eraser, the eraser shielding area and the erasing track of the eraser according to the receiving power of an infrared receiving tube of the infrared touch equipment.
3. The infrared touch device handwriting erasing method according to claim 1, wherein before the step of obtaining the eraser AGC value, the eraser blocking area and the eraser erasing track when detecting the handwriting erasing action on the infrared touch screen, the method further comprises the following steps:
When the writing action on the infrared touch screen is detected, obtaining an AGC value of a writing pen and a moving track of the writing pen;
Acquiring corresponding writing pen attributes according to the AGC values of the writing pens;
And generating writing handwriting to be displayed on the infrared touch screen according to the writing pen attribute and the moving track of the writing pen, and storing the corresponding relation between the writing handwriting and the writing pen attribute.
4. The infrared touch device handwriting erasing method of claim 1, wherein before the step of obtaining the corresponding pen attribute according to the correspondence between the eraser attribute and the preset attribute, the method further comprises the following steps:
Displaying an attribute setting interface and receiving attribute setting parameters acting on the attribute setting interface;
and establishing a corresponding relation between the attribute of the eraser and the attribute of the writing pen according to the attribute setting parameters and storing the corresponding relation.
5. An infrared touch device handwriting erasure method according to any one of claims 1-4 and wherein said handwriting pen attributes include handwriting color, handwriting thickness or handwriting type.
6. An infrared touch device handwriting erasing system is suitable for a writable touch device based on infrared touch, and is characterized by comprising:
The erasing information acquisition module is used for acquiring an eraser AGC value, an eraser shielding area and an erasing track of an eraser when detecting handwriting erasing action on the infrared touch screen;
The eraser attribute acquisition module is used for acquiring corresponding eraser attributes according to the eraser AGC value and the eraser shielding area;
The writing pen attribute acquisition module is used for acquiring corresponding writing pen attributes according to the corresponding relation between the eraser attributes and preset attributes;
And the handwriting erasing module is used for emptying the handwriting corresponding to the writing pen attribute covered by the erasing track of the eraser.
7. The infrared touch device handwriting erasure system according to claim 6, wherein said erasure information obtaining module comprises:
The data scanning unit is used for transmitting infrared light through an infrared transmitting tube of the infrared touch equipment to scan the eraser when detecting handwriting erasing action on the infrared touch screen;
and the data processing unit is used for calculating the AGC value of the eraser, the eraser shielding area and the erasing track of the eraser according to the receiving power of an infrared receiving tube of the infrared touch equipment.
8. An infrared touch device handwriting erasure system according to claim 6 and also comprising:
The device comprises a writing information acquisition module, a writing pen Automatic Gain Control (AGC) module and a writing pen moving track acquisition module, wherein the writing information acquisition module is used for acquiring the AGC value of the writing pen and the moving track of the writing pen when detecting the writing action on the infrared touch screen before acquiring the AGC value of the eraser, the shielding area of the eraser and the erasing track of the eraser;
the writing pen attribute acquisition module is used for acquiring the corresponding writing pen attribute according to the AGC value of the writing pen;
And the writing trace display module is used for generating writing traces to be displayed on the infrared touch screen according to the writing pen attributes and the moving tracks of the writing pen, and storing the corresponding relations between the writing traces and the writing pen attributes.
9. An infrared touch device handwriting erasure system according to claim 6 and also comprising:
The setting parameter acquisition module is used for displaying an attribute setting interface and receiving attribute setting parameters acting on the attribute setting interface before the writing pen attribute acquisition module obtains the corresponding writing pen attribute according to the corresponding relation between the eraser attribute and the preset attribute;
And the attribute relation storage module is used for establishing and storing the corresponding relation between the attribute of the eraser and the attribute of the writing pen according to the attribute setting parameters.
10. an infrared touch device handwriting erasure system according to any of claims 6-9 and wherein said stylus attributes comprise handwriting color, handwriting thickness or handwriting type.
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| PCT/CN2017/103487 WO2018090727A1 (en) | 2016-10-10 | 2017-09-26 | Method of erasing writing trace on infrared touch apparatus, and system |
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| CN106610783B (en) * | 2016-10-10 | 2019-12-17 | 广州视源电子科技股份有限公司 | handwriting erasing method and system for infrared touch equipment |
| CN107291367B (en) * | 2017-06-21 | 2020-10-27 | 广东小天才科技有限公司 | Use method and device of eraser |
| CN107506063A (en) * | 2017-10-11 | 2017-12-22 | 桂进林 | A kind of method and device for aiding in drawing beeline |
| CN108319391B (en) * | 2018-01-31 | 2021-03-02 | 海信视像科技股份有限公司 | Method and device for realizing writing and erasing simultaneously and terminal equipment |
| CN108874275B (en) * | 2018-06-15 | 2020-12-22 | 广州视源电子科技股份有限公司 | Handwriting erasing method, handwriting erasing device, terminal and computer-readable storage medium |
| CN109032432A (en) * | 2018-07-17 | 2018-12-18 | 深圳市天英联合教育股份有限公司 | A kind of method, apparatus and terminal device of lettering pen category identification |
| CN109215098B (en) * | 2018-08-20 | 2023-04-11 | 广州视源电子科技股份有限公司 | Handwriting erasing method and device |
| CN108932083A (en) * | 2018-09-30 | 2018-12-04 | 上海开亿信息科技有限公司 | A kind of writing memory storage |
| CN109597528A (en) * | 2019-01-10 | 2019-04-09 | 明基智能科技（上海）有限公司 | Touch-control system |
| CN110910476A (en) * | 2019-10-18 | 2020-03-24 | 北京字节跳动网络技术有限公司 | Handwriting erasing method, device, medium and electronic equipment |
| CN112905092B (en) * | 2021-02-22 | 2023-07-07 | 深圳市康冠商用科技有限公司 | Method and device for adjusting erasure control, electronic equipment and storage medium |
| CN114237417A (en) * | 2021-11-16 | 2022-03-25 | 杭州迈杰教育科技有限公司 | Handwriting erasing method, system, device and medium for electronic whiteboard |
| CN114356133B (en) * | 2021-12-23 | 2023-12-01 | 深圳市创易联合科技有限公司 | Method and device for analyzing size of touch object, terminal equipment and storage medium |
| CN114610188B (en) * | 2022-02-09 | 2024-02-13 | 广东能龙教育股份有限公司 | Interface handwriting writing method and system, control device and storage medium |
| CN114546174B (en) * | 2022-02-28 | 2024-03-08 | 京东方科技集团股份有限公司 | Handwriting processing method, display device and readable storage medium |
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