WO2018090727A1 - 红外触摸设备笔迹擦除方法和系统 - Google Patents

红外触摸设备笔迹擦除方法和系统 Download PDF

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Publication number
WO2018090727A1
WO2018090727A1 PCT/CN2017/103487 CN2017103487W WO2018090727A1 WO 2018090727 A1 WO2018090727 A1 WO 2018090727A1 CN 2017103487 W CN2017103487 W CN 2017103487W WO 2018090727 A1 WO2018090727 A1 WO 2018090727A1
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eraser
attribute
handwriting
writing
infrared touch
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PCT/CN2017/103487
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English (en)
French (fr)
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吴常军
魏洋洋
刘威河
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广州视源电子科技股份有限公司
广州视睿电子科技有限公司
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Publication of WO2018090727A1 publication Critical patent/WO2018090727A1/zh

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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
    • 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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  • the present invention relates to the field of touch technologies, and in particular, to a method and system for erasing handwriting of an infrared touch device.
  • the infrared touch device is composed of infrared emitting and receiving sensing elements mounted on the outer frame of the touch screen, and any touch object can change the infrared rays on the contacts to realize the touch screen operation.
  • a touch-operated object (such as a finger) can change the infrared of the contact and be converted into a touched coordinate position to achieve an operational response.
  • the conventional infrared touch device handwriting erasing method detects the position of the touch object at different times to obtain an erased track, and clears the handwriting covered by the erased track. Since the handwriting covered by the erasing track is uniformly erased, it is inevitable that the handwriting that the user wants to keep is erased, and there is a disadvantage that the operation convenience is low.
  • An infrared touch device handwriting erasing method includes the following steps:
  • the writing stroke corresponding to the writing pen attribute covered by the erasing track of the eraser is cleared.
  • An infrared touch device handwriting erasing system comprising:
  • An erasure information acquisition module configured to acquire an eraser AGC value, an eraser occlusion area, and an erase trajectory of the eraser when detecting a handwriting erase action on the infrared touch screen;
  • An eraser attribute obtaining module configured to obtain a corresponding eraser attribute according to the eraser AGC value and the eraser occlusion area;
  • a writing pen attribute obtaining module configured to obtain a corresponding writing pen attribute according to the corresponding relationship between the eraser attribute and the preset
  • a writing handwriting erasing module configured to clear a writing handwriting corresponding to the writing pen attribute covered by the erasing track of the eraser.
  • the above-mentioned infrared touch device handwriting erasing method and system acquires the eraser AGC value, the eraser occlusion area, and the erasing trajectory of the eraser when detecting the handwriting erasing action on the infrared touch screen.
  • the corresponding eraser attribute is obtained according to the eraser AGC value and the eraser occlusion area. According to the corresponding relationship between the eraser attribute and the preset, the corresponding writing pen attribute is obtained, and the writing stroke corresponding to the writing pen attribute covered by the erasing track of the eraser is cleared.
  • the writing stroke corresponding to the specific writing pen attribute is erased, and different erasers can be distinguished to realize multi-rubber erasing.
  • the multi-rubber erasing and qualitative erasing functions are realized, which improves the convenience of operation.
  • FIG. 1 is a flow chart of a method for erasing a handwriting of an infrared touch device in an embodiment
  • FIG. 2 is a flow chart of a method for erasing a handwriting of an infrared touch device in another embodiment
  • FIG. 3 is a structural diagram of an infrared touch device handwriting erasing system in an embodiment
  • FIG. 4 is a structural diagram of an infrared touch device handwriting erasing system in another embodiment.
  • an infrared touch device handwriting erasing method is suitable for a touchable device based on an infrared touch. As shown in Figure 1, the method includes the following steps:
  • Step S160 When the handwriting erasing action on the infrared touch screen is detected, the eraser AGC value, the eraser occlusion area, and the erase trajectory of the eraser are acquired.
  • the contact area between the touch object and the infrared touch screen may be detected.
  • the detection is considered.
  • the touch object is erased as an eraser.
  • the contact area is less than or equal to the preset threshold, it can be considered that a writing action on the infrared touch screen is detected, and the touch object is used as a writing pen.
  • the handwriting erasing action is automatically recognized by detecting the contact area of the touch object, thereby improving the convenience of operation.
  • the handwriting erasing action and the writing action can also be distinguished by inputting a mode selection instruction.
  • the touch object is considered as the touch object.
  • the action is a handwriting erase action on the infrared touch screen, that is, the touch object is used as an eraser.
  • AGC Automatic Gain Control
  • the eraser AGC value, the eraser occlusion area, and the erase trajectory of the eraser are acquired in step S160, including steps 162 and 164.
  • Step 162 Scan the eraser by emitting infrared light through an infrared emitting tube of the infrared touch device.
  • the infrared emitting tube of the infrared touch device controls infrared light, and receives corresponding infrared light through the infrared receiving tube, forms an infrared detecting net on the surface of the infrared touch screen, and scans the eraser to obtain data related to the eraser.
  • Step 164 Calculate the eraser AGC value, the eraser occlusion area, and the erase trajectory of the eraser according to the received power of the infrared receiving tube of the infrared touch device.
  • the meaning of the eraser AGC value is not unique, and may be used to distinguish the erasable eraser color or the thickness of the handwriting.
  • the receiving power of the infrared receiving tube will change.
  • the eraser of different AGC values will cause the receiving power of the infrared receiving tube to change differently, and the receiving of the infrared receiving tube is monitored.
  • the power can be calculated correspondingly to the attribute of the eraser AGC value.
  • the eraser AGC value is determined by the transmittance of the eraser, that is, the eraser of different transmittances causes the change of the received power of the infrared receiving tube to be different, and the corresponding eraser AGC value is also different. It will be appreciated that in other embodiments, the eraser AGC value may also be determined by other attributes of the eraser.
  • the position to the eraser and the occlusion area of the eraser can be obtained by continuously scanning the positions of the erasers at different times and smoothly connecting them according to the chronological order.
  • Step S170 Obtain a corresponding eraser attribute according to the eraser AGC value and the eraser occlusion area.
  • the corresponding eraser attribute After detecting the eraser AGC value and the eraser occlusion area, the corresponding eraser attribute can be directly obtained.
  • the eraser properties specifically include erasable handwriting color, handwriting thickness, and handwriting type, etc., and the specific content is not unique. It can be understood that the content of the eraser attribute may also be different according to the meaning of the eraser AGC value and the eraser occlusion area.
  • the setting parameters input by the operator may be received in advance, and the meanings of the eraser AGC value and the eraser occlusion area are set according to the setting parameters, thereby determining the content of the eraser attribute.
  • the eraser AGC value is used to characterize the eraser erasable handwriting color
  • the eraser occlusion area characterizes the eraser erasable handwriting type.
  • the eraser attribute includes an erasable handwriting color and a handwriting type.
  • the handwriting color may specifically include red, blue, yellow, etc.
  • the handwriting type may specifically include characters, regular graphics, lines, touch points, and the like.
  • the text specifically includes printable Chinese, English and numbers
  • the regular graphic refers to a graphic with a regular shape derived from a gallery, such as a triangle, a circle, a square, etc., and the line may specifically include a straight line segment and a curved segment.
  • the eraser AGC value corresponds to the erasable handwriting color.
  • the correspondence between each numerical range and the color of the handwriting can be pre-stored, and the color of the erasable eraser can be known according to the range of values of the eraser AGC value. For example, when the eraser AGC value is within one of the numerical ranges, the characterization can erase the handwriting corresponding to one or more colors, and if the eraser AGC value is greater than the preset upper limit value, the eraser can erase the handwriting of all colors. .
  • the eraser occlusion area corresponds to the erasable handwriting type. For example, when the eraser occlusion area is in one of the area value ranges, the characterization can erase one or more types of handwriting, and if the eraser occlusion area is greater than the preset area upper limit, the eraser can erase all Type of handwriting.
  • Step S180 According to the corresponding relationship between the eraser attribute and the preset, the corresponding pen attribute is obtained.
  • the correspondence between the eraser attribute and the pen attribute can be set in advance. After determining the eraser attribute, the pen attribute can be directly obtained according to the correspondence.
  • the contents of the pen attribute are the same Not unique, specifically including handwriting color, handwriting thickness, or handwriting type.
  • the correspondence between the eraser attribute and the pen attribute is not unique. It can be one-to-one, one-to-many or many-to-one, that is, an eraser attribute can erase the writing corresponding to one or more pen attributes. Handwriting, a writing stroke created by a writing pen attribute can also be erased by a variety of eraser attributes.
  • Step S190 Empty the writing stroke corresponding to the writing pen attribute covered by the erasing track of the eraser.
  • the writing stroke refers to the handwriting generated by the corresponding writing pen attribute, and may specifically be a character, a graphic, a line segment or a touch point.
  • the writing stroke corresponding to the stylus attribute in the area covered by the erase trajectory of the eraser is obtained and erased, thereby implementing the handwriting qualitative erasing function for a specific attribute. For example, for the circle and radius of the drawn blue, when you need to erase the radius and keep the circle, you can erase the blue by selecting the eraser property as the eraser that can erase the blue and line handwriting. The radius retains the blue circle.
  • the above-mentioned infrared touch device handwriting erasing method when performing the handwriting erasing, obtaining the eraser AGC value and the eraser occlusion area and determining the eraser attribute, erasing the writing handwriting corresponding to the specific writing pen attribute, can distinguish different
  • the eraser is used to realize multi-rubber erasing at the same time, and the multi-rubber simultaneous erasing and qualitative erasing functions are realized, thereby improving the convenience of operation.
  • the infrared touch device handwriting erasing method further includes steps S130 to S150.
  • Step S130 Acquire a writing pen AGC value and a movement trajectory of the writing pen when detecting a writing action on the infrared touch screen.
  • the manner of detecting the writing action on the infrared touch screen is not unique.
  • the contact area between the touch object and the infrared touch screen is also detected, and the writing action on the infrared touch screen is detected when the contact area is less than or equal to the preset threshold.
  • the writing operation is automatically recognized by detecting the contact area of the touch object, and the operation convenience is improved.
  • the eraser is scanned to obtain the writing pen AGC value for subsequent determination of the writing pen attribute. Scanning the eraser also captures the eraser's erase track for subsequent note-taking operations.
  • the meaning of the writing pen AGC value is not unique. Specifically, it can be used to distinguish the writing color or the writing thickness of the writing pen.
  • the writing pen AGC value is transmitted by the writing pen The rate is determined.
  • Step S140 Acquire a corresponding stylus attribute according to the stylus AGC value.
  • the content of the pen attribute will also be different.
  • the setting parameter input by the operator may be received in advance, and the meaning of the writing pen AGC value is set according to the setting parameter, thereby determining the content included in the writing pen attribute.
  • the color of the writing stroke of the writing pen can be determined according to the correspondence between the AGC value of the writing pen and the preset numerical range. For example, when the writing pen AGC value is within one of the numerical ranges, the characterization pen can write a handwriting corresponding to one color, thereby determining the writing pen attribute.
  • Step S150 Generate a writing handwriting on the infrared touch screen according to the writing pen attribute and the movement trajectory of the writing pen, and store the corresponding relationship between the writing handwriting and the writing pen attribute.
  • the writing handwriting is generated according to the movement track on the infrared touch screen for display, and the writing operation is completed. For example, when it is determined that the writing pen attribute is a blue handwriting and the moving track constitutes a triangle, a blue triangle is displayed on the infrared touch screen, and the displayed triangle may overlap the moving track or may not coincide with the moving track.
  • the correspondence between the writing handwriting and the writing pen attribute is stored, so that the writing handwriting generated by the writing pen attribute can be obtained when erasing, and the operation convenience is improved.
  • the infrared touch device handwriting erasing method before the step S180, further includes step 110 and step 120.
  • Step 110 Display an attribute setting interface, and receive an attribute setting parameter that is applied to the attribute setting interface.
  • Step 110 may be specifically before step S130 or after step S130.
  • the operator can input the attribute setting parameter by touching the infrared touch screen.
  • the specific content of the attribute setting parameter is not unique.
  • the attribute setting parameter may include the numerical range of the eraser AGC value and the corresponding erasable handwriting color, and the numerical range of the writing pen AGC value. And corresponding to the color of the handwriting that can be written.
  • Step 120 Establish a correspondence between the eraser attribute and the pen attribute according to the attribute setting parameter and store it.
  • the corresponding eraser attribute and pen attribute are created according to the attribute setting parameters. For example, if the erasable handwriting color corresponding to a certain value range of the eraser AGC value is blue, the eraser attribute corresponding to the erasable blue handwriting is established; a certain numerical range of the eraser AGC value corresponds to Erasable handwriting colors, including blue and red, correspond to an eraser property that creates an erasable blue and red handwriting, and so on.
  • the way to establish the writing pen attribute is to establish a writing pen attribute of a handwriting color for a data range of the writing pen AGC value.
  • the writing pen attribute A is a writeable blue handwriting
  • the writing pen attribute B can write a red handwriting
  • the writing pen attribute C can write a yellow handwriting
  • the eraser attribute X can erase the blue handwriting
  • the eraser attribute Y can erase the blue handwriting.
  • red handwriting the eraser attribute Z erases blue, red, and yellow handwriting.
  • the correspondence relationship between the eraser attribute X and the writing pen attribute A, the correspondence relationship between the eraser attribute Y and the writing pen attributes A and B, and the correspondence relationship between the eraser attribute Z and the writing pen attributes A, B and C are stored and stored.
  • an infrared touch device handwriting erasing system is suitable for use with an infrared touch based writable touch device. As shown in FIG. 3, the system includes an erase information acquisition module 160, an eraser property acquisition module 170, a stylus attribute acquisition module 180, and a writing stroke erasing module 190.
  • the erasure information acquisition module 160 is configured to acquire an eraser AGC value, an eraser occlusion area, and an erase trajectory of the eraser when the handwriting erase action on the infrared touch screen is detected.
  • the specific manner of detecting the handwriting erasing action is not unique.
  • by detecting the contact area between the touch object and the infrared touch screen when the contact area is greater than the preset threshold, it is considered that the handwriting erasing action on the infrared touch screen is detected.
  • the touch object is erased as an eraser.
  • the contact area is less than or equal to the preset threshold, it can be considered that a writing action on the infrared touch screen is detected, and the touch object is used as a writing pen.
  • the handwriting erasing action is automatically recognized by detecting the contact area of the touch object, thereby improving the convenience of operation.
  • the erase information acquisition module 160 includes a data scanning unit and a data processing unit.
  • the data scanning unit is configured to scan the eraser by emitting infrared light through the infrared emitting tube of the infrared touch device when detecting the handwriting erasing action on the infrared touch screen.
  • the infrared emitting tube of the infrared touch device controls infrared light, and receives corresponding infrared light through the infrared receiving tube, forms an infrared detecting net on the surface of the infrared touch screen, and scans the eraser to obtain data related to the eraser.
  • the data processing unit is configured to calculate an eraser AGC value, an eraser occlusion area, and an erase trajectory of the eraser according to the received power of the infrared receiving tube of the infrared touch device.
  • the meaning of the eraser AGC value is not unique, and may be used to distinguish the erasable eraser color or the thickness of the handwriting.
  • the receiving power of the infrared receiving tube will change.
  • the eraser of different AGC values will cause the receiving power of the infrared receiving tube to change differently, and the receiving of the infrared receiving tube is monitored.
  • the power can be calculated correspondingly to the attribute of the eraser AGC value.
  • the eraser AGC value is determined by the transmittance of the eraser.
  • the position of the eraser and the occlusion area of the eraser can be detected based on the position of the infrared receiving tube whose receiving power has changed and the distance between them.
  • the erasing trajectory of the eraser can be obtained by continuously scanning the positions of the erasers at different times and smoothly connecting them according to the chronological order.
  • the eraser property acquisition module 170 is configured to obtain a corresponding eraser property according to the eraser AGC value and the eraser occlusion area.
  • the corresponding eraser attribute can be directly obtained.
  • the eraser properties specifically include erasable handwriting color, handwriting thickness, and handwriting type, etc., and the specific content is not unique.
  • the setting parameters input by the operator may be received in advance, and the meanings of the eraser AGC value and the eraser occlusion area are set according to the setting parameters, thereby determining the content of the eraser attribute.
  • 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.
  • the correspondence between the eraser attribute and the pen attribute can be set in advance. After determining the eraser attribute, the pen attribute can be directly obtained according to the correspondence.
  • the contents of the pen attribute are also not unique, and may include handwriting color, handwriting thickness, or handwriting type.
  • the correspondence between the eraser attribute and the pen attribute is also not unique, and can be one-to-one, one-to-many, or many-to-one.
  • the writing stroke erasing module 190 is configured to clear the writing stroke corresponding to the writing pen attribute covered by the erasing trajectory of the eraser.
  • the writing stroke refers to the handwriting generated by the corresponding writing pen attribute, and may specifically be a character, a graphic, a line segment or a touch point.
  • the above-mentioned infrared touch device handwriting erasing system when performing the handwriting erasing, obtains the eraser AGC value and the eraser occlusion area and determines the eraser attribute, and then erases the writing handwriting corresponding to the specific writing pen attribute, and can distinguish different
  • the eraser is used to realize multi-rubber erasing at the same time, and the multi-rubber simultaneous erasing and qualitative erasing functions are realized, thereby improving the convenience of operation.
  • the infrared touch device handwriting erasing system further includes a writing information acquisition module 130, a writing pen attribute acquisition module 140, and a writing handwriting display module 150.
  • the writing information acquiring module 130 is configured to obtain the writing instrument AGC value and when the writing action to the infrared touch screen is detected before the erasing information acquiring module 160 acquires the eraser AGC value, the eraser occlusion area, and the erasing trajectory of the eraser. The movement of the pen.
  • the manner of detecting the writing action on the infrared touch screen is not unique.
  • the contact area between the touch object and the infrared touch screen is also detected, and the writing action on the infrared touch screen is detected when the contact area is less than or equal to the preset threshold.
  • the writing operation is automatically recognized by detecting the contact area of the touch object, and the operation convenience is improved.
  • the eraser is scanned to obtain the writing pen AGC value for subsequent determination of the writing pen attribute. Scanning the eraser also captures the eraser's erase track for subsequent note-taking operations.
  • the meaning of the writing pen AGC value is not unique. It can be used to distinguish the writing pen. Write handwriting color or handwriting thickness, etc.
  • the writing pen AGC value is determined by the transmittance of the writing pen.
  • the writing pen attribute obtaining module 140 is configured to acquire a corresponding writing pen attribute according to the writing pen AGC value.
  • the content of the pen attribute will also be different.
  • the setting parameter input by the operator may be received in advance, and the meaning of the writing pen AGC value is set according to the setting parameter, thereby determining the content included in the writing pen attribute.
  • the writing handwriting display module 150 is configured to generate a writing handwriting on the infrared touch screen according to the writing pen attribute and the movement trajectory of the writing pen, and store the corresponding relationship between the writing handwriting and the writing pen attribute.
  • the writing handwriting is generated according to the movement track on the infrared touch screen for display, and the writing operation is completed.
  • the correspondence between the writing handwriting and the writing pen attribute is stored, so that the writing handwriting generated by the writing pen attribute can be obtained when erasing, and the operation convenience is improved.
  • the infrared touch device handwriting erasing system further includes a setting parameter acquisition module and an attribute relationship storage module.
  • the setting parameter obtaining module is configured to display an attribute setting interface, and receive an attribute setting parameter acting on the attribute setting interface, before the stylus attribute obtaining module 180 obtains the corresponding stylus attribute according to the corresponding relationship between the eraser attribute and the preset.
  • the operator can input the attribute setting parameter by touching the infrared touch screen.
  • the attribute relationship storage module is configured to establish and store the correspondence between the eraser attribute and the pen attribute according to the attribute setting parameter. First, the corresponding eraser attribute and pen attribute are created according to the attribute setting parameters. After the eraser attribute and the pen attribute are obtained, the correspondence between the eraser attribute and the pen attribute is established and stored.

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Abstract

本发明涉及一种红外触摸设备笔迹擦除方法和系统，在检测到对红外触摸屏的笔迹擦除动作时，获取橡皮擦AGC值、橡皮擦遮挡面积以及橡皮擦的擦除轨迹。根据橡皮擦AGC值和橡皮擦遮挡面积获取对应的橡皮擦属性。根据橡皮擦属性与预设的对应关系，得到对应的书写笔属性，清空橡皮擦的擦除轨迹所覆盖的书写笔属性所对应的书写笔迹。在进行笔迹擦除时，获取橡皮擦AGC值和橡皮擦遮挡面积并确定橡皮擦属性后，针对特定书写笔属性所对应的书写笔迹进行擦除，可以区分不同的橡皮擦来实现多橡皮同时擦除，实现多橡皮同时擦除和定性擦除功能，提高了操作便利性。

Description

红外触摸设备笔迹擦除方法和系统 技术领域
本发明涉及触控技术领域，特别是涉及一种红外触摸设备笔迹擦除方法和系统。
背景技术
红外触摸设备由装在触摸屏外框上的红外线发射与接收感测元件构成，任何触摸物体可改变触点上的红外线而实现触摸屏操作。触控操作的物体(比如手指)可以改变触点的红外线，进而被转化成触控的坐标位置而实现操作的响应。
传统的红外触摸设备笔迹擦除方法是检测不同时刻触摸物体的位置得到擦除轨迹，并清除擦除轨迹所覆盖的笔迹。由于是对擦除轨迹覆盖的笔迹统一进行擦除，难免会擦掉用户想要保留的笔迹，存在操作便利性低的缺点。
发明内容
基于此，有必要针对上述问题，提供一种操作便利性高的红外触摸设备笔迹擦除方法和系统。
一种红外触摸设备笔迹擦除方法，包括以下步骤：
在检测到对红外触摸屏的笔迹擦除动作时，获取橡皮擦AGC值、橡皮擦遮挡面积以及橡皮擦的擦除轨迹；
根据所述橡皮擦AGC值和所述橡皮擦遮挡面积获取对应的橡皮擦属性；
根据所述橡皮擦属性与预设的对应关系，得到对应的书写笔属性；
清空所述橡皮擦的擦除轨迹所覆盖的所述书写笔属性所对应的书写笔迹。
一种红外触摸设备笔迹擦除系统，包括：
擦除信息获取模块，用于在检测到对红外触摸屏的笔迹擦除动作时，获取橡皮擦AGC值、橡皮擦遮挡面积以及橡皮擦的擦除轨迹；
橡皮擦属性获取模块，用于根据所述橡皮擦AGC值和所述橡皮擦遮挡面积获取对应的橡皮擦属性；
书写笔属性获取模块，用于根据所述橡皮擦属性与预设的对应关系，得到对应的书写笔属性；
书写笔迹擦除模块，用于清空所述橡皮擦的擦除轨迹所覆盖的所述书写笔属性所对应的书写笔迹。
上述红外触摸设备笔迹擦除方法和系统，在检测到对红外触摸屏的笔迹擦除动作时，获取橡皮擦AGC值、橡皮擦遮挡面积以及橡皮擦的擦除轨迹。根据橡皮擦AGC值和橡皮擦遮挡面积获取对应的橡皮擦属性。根据橡皮擦属性与预设的对应关系，得到对应的书写笔属性，清空橡皮擦的擦除轨迹所覆盖的书写笔属性所对应的书写笔迹。在进行笔迹擦除时，获取橡皮擦AGC值和橡皮擦遮挡面积并确定橡皮擦属性后，针对特定书写笔属性所对应的书写笔迹进行擦除，可以区分不同的橡皮擦来实现多橡皮同时擦除，实现多橡皮同时擦除和定性擦除功能，提高了操作便利性。
附图说明
图1为一实施例中红外触摸设备笔迹擦除方法的流程图；
图2为另一实施例中红外触摸设备笔迹擦除方法的流程图；
图3为一实施例中红外触摸设备笔迹擦除系统的结构图；
图4为另一实施例中红外触摸设备笔迹擦除系统的结构图。
具体实施方式
在一个实施例中，一种红外触摸设备笔迹擦除方法，适用于基于红外触摸的可书写触摸设备。如图1所示，该方法包括以下步骤：
步骤S160：在检测到对红外触摸屏的笔迹擦除动作时，获取橡皮擦AGC值、橡皮擦遮挡面积以及橡皮擦的擦除轨迹。
检测笔迹擦除动作的具体方式并不唯一，本实施例中，可以是通过检测触摸物与红外触摸屏的接触面积，在接触面积大于预设阈值时，则认为检测 到对红外触摸屏的笔迹擦除动作，将触摸物作为橡皮擦进行笔迹擦除操作。相反地，若接触面积小于或等于预设阈值，则可认为检测到对红外触摸屏的书写动作，将触摸物作为书写笔。通过检测触摸物的接触面积自动识别笔迹擦除动作，提高了操作便利性。可以理解，在其他实施例中，也可以通过输入模式选择指令来区分笔迹擦除动作和书写动作，例如，在用户点击红外触摸屏上带有“擦除模式”的虚拟按钮后，则认为触摸物的动作为对红外触摸屏的笔迹擦除动作，即将触摸物作为橡皮擦。
对橡皮擦进行扫描，获取橡皮擦AGC(Automatic Gain Control，自动增益控制)值和橡皮擦遮挡面积这两个元素，用作后续确定橡皮擦属性。对橡皮擦进行扫描还可获取橡皮擦的擦除轨迹，以便后续进行笔迹操作操作。
具体地，在一个实施例中，步骤S160中获取橡皮擦AGC值、橡皮擦遮挡面积以及橡皮擦的擦除轨迹，包括步骤162和步骤164。
步骤162：通过红外触摸设备的红外发射管发射红外光对橡皮擦进行扫描。
控制红外触摸设备的红外发射管发生红外光，并通过红外接收管接收对应的红外光，在红外触摸屏表面形成红外线探测网，对橡皮擦进行扫描以便获取橡皮擦的相关数据。
步骤164：根据红外触摸设备的红外接收管的接收功率计算橡皮擦AGC值、橡皮擦遮挡面积以及橡皮擦的擦除轨迹。
橡皮擦AGC值所表征的含义并不唯一，具体可以是用于区分橡皮擦可擦除的笔迹颜色或笔迹粗细等。当红外发射管发射的红外光被遮挡时，红外接收管的接收功率会发生改变，不同AGC值的橡皮擦会导致红外接收管的接收功率的改变幅度也不一样，通过监测红外接收管的接收功率可对应计算出橡皮擦AGC值这一属性。本实施例中，橡皮擦AGC值由橡皮擦的透射率确定，也就是说，不同透射率的橡皮擦使红外接收管的接收功率的改变幅度不一样，所对应的橡皮擦AGC值也不一样。可以理解，在其他实施例中，也可以是通过橡皮擦的其他属性来确定橡皮擦AGC值。
根据接收功率发生变化的红外接收管的位置以及之间的距离，可检测得 到橡皮擦的位置和橡皮擦的遮挡面积。通过连续扫描得到不同时刻橡皮擦的位置，并根据时间顺序进行平滑连接便可得到橡皮擦的擦除轨迹。
步骤S170：根据橡皮擦AGC值和橡皮擦遮挡面积获取对应的橡皮擦属性。
在检测得到橡皮擦AGC值和橡皮擦遮挡面积之后，便可直接得到对应的橡皮擦属性。橡皮擦属性具体包括可擦除的笔迹颜色、笔迹粗细和笔迹类型等，具体内容并不唯一。可以理解，根据橡皮擦AGC值和橡皮擦遮挡面积所表征的含义不同，橡皮擦属性所包含内容也会对应有所不同。可预先接收操作人员输入的设置参数，根据设置参数对橡皮擦AGC值、橡皮擦遮挡面积的含义进行设置，从而确定橡皮擦属性所包含的内容。
以橡皮擦AGC值表征橡皮擦可擦除的笔迹颜色、橡皮擦遮挡面积表征橡皮擦可擦除的笔迹类型为例，则橡皮擦属性包括可擦除的笔迹颜色和笔迹类型。笔迹颜色具体可包括红色、蓝色和黄色等，笔迹类型具体可包括文字、规则图形、线条和触摸点等。其中，文字具体包括可打印的中文、英文和数字等，规则图形指由图库中导出的具有规则形状的图形，如三角形、圆形和正方形等，线条具体可包括直线段和曲线段等。
首先根据橡皮擦AGC值和预设的数值范围的对应关系，确定橡皮擦对应可擦除的笔迹颜色。具体可预先存储各数值范围与笔迹颜色的对应关系，根据橡皮擦AGC值所处的数值范围便可知道橡皮擦可擦除的笔迹颜色。例如，橡皮擦AGC值处于其中一数值范围内时，表征可擦除对应一种或多种颜色的笔迹，若橡皮擦AGC值大于预设上限值，则橡皮擦可擦除所有颜色的笔迹。根据橡皮擦遮挡面积和预设的面积值范围的对应关系，确定橡皮擦对应可擦除的笔迹类型。例如，橡皮擦遮挡面积处于其中一面积值范围时，表征可擦除对应的一种或多种类型的笔迹，若橡皮擦遮挡面积大于预设的面积上限值，则橡皮擦可擦除所有类型的笔迹。
步骤S180：根据橡皮擦属性与预设的对应关系，得到对应的书写笔属性。
可预先设置橡皮擦属性与书写笔属性的对应关系，在确定橡皮擦属性之后，根据对应关系可直接得到书写笔属性。书写笔属性所包含的内容同样并 不唯一，具体可包括笔迹颜色、笔迹粗细或笔迹类型。橡皮擦属性与书写笔属性的对应关系也并不唯一，可以是一对一、一对多或者多对一，即一种橡皮擦属性可擦除对应一种或多种书写笔属性产生的书写笔迹，一种书写笔属性产生的书写笔迹也可由多种橡皮擦属性擦除。
步骤S190：清空橡皮擦的擦除轨迹所覆盖的书写笔属性所对应的书写笔迹。
书写笔迹指由对应书写笔属性产生的笔迹，具体可以是文字、图形、线段或触摸点等。在确定橡皮擦属性所对应的书写笔属性之后，获取橡皮擦的擦除轨迹所覆盖的区域中书写笔属性所对应的书写笔迹并进行擦除，实现针对特定属性的笔迹定性擦除功能。例如对于已绘制的蓝色的圆和半径，当需要对半径进行擦除而保留圆时，可通过选取橡皮擦属性为可擦除蓝色笔迹和线条笔迹的橡皮擦，便可擦除蓝色半径而保留蓝色圆。
上述红外触摸设备笔迹擦除方法，在进行笔迹擦除时，获取橡皮擦AGC值和橡皮擦遮挡面积并确定橡皮擦属性后，针对特定书写笔属性所对应的书写笔迹进行擦除，可以区分不同的橡皮擦来实现多橡皮同时擦除，实现多橡皮同时擦除和定性擦除功能，提高了操作便利性。
在一个实施例中，如图2所示，步骤S160之前，红外触摸设备笔迹擦除方法还包括步骤S130至步骤S150。
步骤S130：在检测到对红外触摸屏的书写动作时，获取书写笔AGC值和书写笔的移动轨迹。
检测对红外触摸屏的书写动作的方式并不唯一，本实施例中，同样可通过检测触摸物与红外触摸屏的接触面积，在接触面积小于或等于预设阈值时认为检测到对红外触摸屏的书写动作，将触摸物作为书写笔。通过检测触摸物的接触面积自动识别书写动作，提高了操作便利性。
对橡皮擦进行扫描，获取书写笔AGC值，用作后续确定书写笔属性。对橡皮擦进行扫描还可获取橡皮擦的擦除轨迹，以便后续进行笔记显示操作。书写笔AGC值所表征的含义也并不唯一，具体可以是用于区分书写笔可书写的笔迹颜色或笔迹粗细等。本实施例中，书写笔AGC值由书写笔的透射 率确定。
步骤S140：根据书写笔AGC值获取对应的书写笔属性。
根据书写笔AGC值所表征的含义不同，书写笔属性所包含内容也会对应有所不同。可预先接收操作人员输入的设置参数，根据设置参数对书写笔AGC值的含义进行设置，从而确定书写笔属性所包含的内容。
以书写笔AGC值表征书写笔可书写的笔迹颜色为例，根据书写笔AGC值与预设数值范围的对应关系，确定书写笔可书写的笔迹颜色。例如书写笔AGC值处于其中一数值范围内时，表征书写笔可书写对应一种颜色的笔迹，从而确定书写笔属性。
步骤S150：根据书写笔属性和书写笔的移动轨迹生成书写笔迹在红外触摸屏显示，并存储书写笔迹与书写笔属性的对应关系。
在确定书写笔属性后，根据红外触摸屏上的移动轨迹生成书写笔迹进行显示，完成书写操作。例如，在确定书写笔属性为蓝色笔迹，移动轨迹构成一个三角形时，则在红外触摸屏上显示一个蓝色的三角形，显示的三角形可以移动轨迹重合，也可与移动轨迹不重合。将书写笔迹与书写笔属性的对应关系进行存储，以便进行擦除时可获取到书写笔属性所产生的书写笔迹，提高操作便利性。
在一个实施例中，步骤S180之前，红外触摸设备笔迹擦除方法还包括步骤110和步骤120。
步骤110：显示属性设置界面，并接收作用于属性设置界面的属性设置参数。
步骤110具体可在步骤S130之前，也可在步骤S130之后。在红外触摸屏显示属性设置界面，操作人员可通过对红外触摸屏进行触摸操作输入属性设置参数。属性设置参数的具体内容并不唯一，以对不同颜色笔迹进行定性擦除为例，属性设置参数可包括橡皮擦AGC值的数值范围和对应可擦除的笔迹颜色，书写笔AGC值的数值范围和对应可书写的笔迹颜色。
步骤120：根据属性设置参数建立橡皮擦属性与书写笔属性的对应关系并存储。
首先根据属性设置参数建立对应的橡皮擦属性和书写笔属性。例如，对于橡皮擦AGC值的某一数值范围对应的可擦除的笔迹颜色为蓝色，则对应建立一可擦除蓝色笔迹的橡皮擦属性；橡皮擦AGC值的某一数值范围对应的可擦除的笔迹颜色包括蓝色和红色，则对应建立一可擦除蓝色笔迹和红色笔迹的橡皮擦属性，以此类推。建立书写笔属性的方式为，对于书写笔AGC值的一数据范围对应建立一种笔迹颜色的书写笔属性。
在得到橡皮擦属性和书写笔属性之后，建立橡皮擦属性与书写笔属性的对应关系并存储。例如书写笔属性A为可书写蓝色笔迹，书写笔属性B可书写红色笔迹，书写笔属性C可书写黄色笔迹，橡皮擦属性X可擦除蓝色笔迹，橡皮擦属性Y可擦除蓝色和红色笔迹，橡皮擦属性Z可擦除蓝色、红色和黄色笔迹。则建立橡皮擦属性X与书写笔属性A的对应关系，橡皮擦属性Y与书写笔属性A和B的对应关系，以及橡皮擦属性Z与书写笔属性A、B和C的对应关系并存储。
可以理解，根据实际需求不同，建立对应关系的具体方式也会不同。通过预先建立橡皮擦属性与书写笔属性的对应关系并存储，以便后续进行笔迹定性擦除，提高了操作便利性。
在一个实施例中，一种红外触摸设备笔迹擦除系统，适用于基于红外触摸的可书写触摸设备。如图3所示，该系统包括擦除信息获取模块160、橡皮擦属性获取模块170、书写笔属性获取模块180和书写笔迹擦除模块190。
擦除信息获取模块160用于在检测到对红外触摸屏的笔迹擦除动作时，获取橡皮擦AGC值、橡皮擦遮挡面积以及橡皮擦的擦除轨迹。
检测笔迹擦除动作的具体方式并不唯一，本实施例中，通过检测触摸物与红外触摸屏的接触面积，在接触面积大于预设阈值时，则认为检测到对红外触摸屏的笔迹擦除动作，将触摸物作为橡皮擦进行笔迹擦除操作。相反地，若接触面积小于或等于预设阈值，则可认为检测到对红外触摸屏的书写动作，将触摸物作为书写笔。通过检测触摸物的接触面积自动识别笔迹擦除动作，提高了操作便利性。
对橡皮擦进行扫描，获取橡皮擦AGC值和橡皮擦遮挡面积这两个元素，用作后续确定橡皮擦属性。对橡皮擦进行扫描还可获取橡皮擦的擦除轨迹，以便后续进行笔迹操作操作。
具体地，在一个实施例中，擦除信息获取模块160包括数据扫描单元和数据处理单元。
数据扫描单元用于在检测到对红外触摸屏的笔迹擦除动作时，通过红外触摸设备的红外发射管发射红外光对橡皮擦进行扫描。
控制红外触摸设备的红外发射管发生红外光，并通过红外接收管接收对应的红外光，在红外触摸屏表面形成红外线探测网，对橡皮擦进行扫描以便获取橡皮擦的相关数据。
数据处理单元用于根据红外触摸设备的红外接收管的接收功率计算橡皮擦AGC值、橡皮擦遮挡面积以及橡皮擦的擦除轨迹。
橡皮擦AGC值所表征的含义并不唯一，具体可以是用于区分橡皮擦可擦除的笔迹颜色或笔迹粗细等。当红外发射管发射的红外光被遮挡时，红外接收管的接收功率会发生改变，不同AGC值的橡皮擦会导致红外接收管的接收功率的改变幅度也不一样，通过监测红外接收管的接收功率可对应计算出橡皮擦AGC值这一属性。本实施例中，橡皮擦AGC值由橡皮擦的透射率确定。
根据接收功率发生变化的红外接收管的位置以及之间的距离，可检测得到橡皮擦的位置和橡皮擦的遮挡面积。通过连续扫描得到不同时刻橡皮擦的位置，并根据时间顺序进行平滑连接便可得到橡皮擦的擦除轨迹。
橡皮擦属性获取模块170用于根据橡皮擦AGC值和橡皮擦遮挡面积获取对应的橡皮擦属性。
在检测得到橡皮擦AGC值和橡皮擦遮挡面积之后，便可直接得到对应的橡皮擦属性。橡皮擦属性具体包括可擦除的笔迹颜色、笔迹粗细和笔迹类型等，具体内容并不唯一。可预先接收操作人员输入的设置参数，根据设置参数对橡皮擦AGC值、橡皮擦遮挡面积的含义进行设置，从而确定橡皮擦属性所包含的内容。
书写笔属性获取模块180用于根据橡皮擦属性与预设的对应关系，得到对应的书写笔属性。
可预先设置橡皮擦属性与书写笔属性的对应关系，在确定橡皮擦属性之后，根据对应关系可直接得到书写笔属性。书写笔属性所包含的内容同样并不唯一，具体可包括笔迹颜色、笔迹粗细或笔迹类型。橡皮擦属性与书写笔属性的对应关系也并不唯一，可以是一对一、一对多或者多对一。
书写笔迹擦除模块190用于清空橡皮擦的擦除轨迹所覆盖的书写笔属性所对应的书写笔迹。
书写笔迹指由对应书写笔属性产生的笔迹，具体可以是文字、图形、线段或触摸点等。在确定橡皮擦属性所对应的书写笔属性之后，获取橡皮擦的擦除轨迹所覆盖的区域中书写笔属性所对应的书写笔迹并进行擦除，实现针对特定属性的笔迹定性擦除功能。
上述红外触摸设备笔迹擦除系统，在进行笔迹擦除时，获取橡皮擦AGC值和橡皮擦遮挡面积并确定橡皮擦属性后，针对特定书写笔属性所对应的书写笔迹进行擦除，可以区分不同的橡皮擦来实现多橡皮同时擦除，实现多橡皮同时擦除和定性擦除功能，提高了操作便利性。
在一个实施例中，如图4所示，红外触摸设备笔迹擦除系统还包括书写信息获取模块130、书写笔属性获取模块140和书写笔迹显示模块150。
书写信息获取模块130用于在擦除信息获取模块160获取橡皮擦AGC值、橡皮擦遮挡面积以及橡皮擦的擦除轨迹之前，在检测到对红外触摸屏的书写动作时，获取书写笔AGC值和书写笔的移动轨迹。
检测对红外触摸屏的书写动作的方式并不唯一，本实施例中，同样可通过检测触摸物与红外触摸屏的接触面积，在接触面积小于或等于预设阈值时认为检测到对红外触摸屏的书写动作，将触摸物作为书写笔。通过检测触摸物的接触面积自动识别书写动作，提高了操作便利性。
对橡皮擦进行扫描，获取书写笔AGC值，用作后续确定书写笔属性。对橡皮擦进行扫描还可获取橡皮擦的擦除轨迹，以便后续进行笔记显示操作。书写笔AGC值所表征的含义也并不唯一，具体可以是用于区分书写笔可书 写的笔迹颜色或笔迹粗细等。本实施例中，书写笔AGC值由书写笔的透射率确定。
书写笔属性获取模块140用于根据书写笔AGC值获取对应的书写笔属性。
根据书写笔AGC值所表征的含义不同，书写笔属性所包含内容也会对应有所不同。可预先接收操作人员输入的设置参数，根据设置参数对书写笔AGC值的含义进行设置，从而确定书写笔属性所包含的内容。
书写笔迹显示模块150用于根据书写笔属性和书写笔的移动轨迹生成书写笔迹在红外触摸屏显示，并存储书写笔迹与书写笔属性的对应关系。
在确定书写笔属性后，根据红外触摸屏上的移动轨迹生成书写笔迹进行显示，完成书写操作。将书写笔迹与书写笔属性的对应关系进行存储，以便进行擦除时可获取到书写笔属性所产生的书写笔迹，提高操作便利性。
在一个实施例中，红外触摸设备笔迹擦除系统还包括设置参数获取模块和属性关系存储模块。
设置参数获取模块用于在书写笔属性获取模块180根据橡皮擦属性与预设的对应关系，得到对应的书写笔属性之前，显示属性设置界面，并接收作用于属性设置界面的属性设置参数。在红外触摸屏显示属性设置界面，操作人员可通过对红外触摸屏进行触摸操作输入属性设置参数。
属性关系存储模块用于根据属性设置参数建立橡皮擦属性与书写笔属性的对应关系并存储。首先根据属性设置参数建立对应的橡皮擦属性和书写笔属性。在得到橡皮擦属性和书写笔属性之后，建立橡皮擦属性与书写笔属性的对应关系并存储。
可以理解，根据实际需求不同，建立对应关系的具体方式也会不同。通过预先建立橡皮擦属性与书写笔属性的对应关系并存储，以便后续进行笔迹定性擦除，提高了操作便利性。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这 些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。

Claims (10)

  1. 一种红外触摸设备笔迹擦除方法，其特征在于，包括以下步骤：
    在检测到对红外触摸屏的笔迹擦除动作时，获取橡皮擦AGC值、橡皮擦遮挡面积以及橡皮擦的擦除轨迹；
    根据所述橡皮擦AGC值和所述橡皮擦遮挡面积获取对应的橡皮擦属性；
    根据所述橡皮擦属性与预设的对应关系，得到对应的书写笔属性；
    清空所述橡皮擦的擦除轨迹所覆盖的所述书写笔属性所对应的书写笔迹。
  2. 根据权利要求1所述的红外触摸设备笔迹擦除方法，其特征在于，所述获取橡皮擦AGC值、橡皮擦遮挡面积以及橡皮擦的擦除轨迹的步骤，包括以下步骤：
    通过红外触摸设备的红外发射管发射红外光对所述橡皮擦进行扫描；
    根据所述红外触摸设备的红外接收管的接收功率计算所述橡皮擦AGC值、所述橡皮擦遮挡面积以及所述橡皮擦的擦除轨迹。
  3. 根据权利要求1所述的红外触摸设备笔迹擦除方法，其特征在于，所述在检测到对红外触摸屏的笔迹擦除动作时，获取橡皮擦AGC值、橡皮擦遮挡面积以及橡皮擦的擦除轨迹的步骤之前，还包括以下步骤：
    在检测到对红外触摸屏的书写动作时，获取书写笔AGC值和书写笔的移动轨迹；
    根据所述书写笔AGC值获取对应的书写笔属性；
    根据所述书写笔属性和所述书写笔的移动轨迹生成书写笔迹在所述红外触摸屏显示，并存储所述书写笔迹与所述书写笔属性的对应关系。
  4. 根据权利要求1所述的红外触摸设备笔迹擦除方法，其特征在于，所述根据所述橡皮擦属性与预设的对应关系，得到对应的书写笔属性的步骤之前，还包括以下步骤：
    显示属性设置界面，并接收作用于所述属性设置界面的属性设置参数；
    根据所述属性设置参数建立橡皮擦属性与书写笔属性的对应关系并存储。
  5. 根据权利要求1-4任意一项所述的红外触摸设备笔迹擦除方法，其特征在于，所述书写笔属性包括笔迹颜色、笔迹粗细或笔迹类型。
  6. 一种红外触摸设备笔迹擦除系统，其特征在于，包括：
    擦除信息获取模块，用于在检测到对红外触摸屏的笔迹擦除动作时，获取橡皮擦AGC值、橡皮擦遮挡面积以及橡皮擦的擦除轨迹；
    橡皮擦属性获取模块，用于根据所述橡皮擦AGC值和所述橡皮擦遮挡面积获取对应的橡皮擦属性；
    书写笔属性获取模块，用于根据所述橡皮擦属性与预设的对应关系，得到对应的书写笔属性；
    书写笔迹擦除模块，用于清空所述橡皮擦的擦除轨迹所覆盖的所述书写笔属性所对应的书写笔迹。
  7. 根据权利要求6所述的红外触摸设备笔迹擦除系统，其特征在于，其特征在于，所述擦除信息获取模块包括：
    数据扫描单元，用于在检测到对红外触摸屏的笔迹擦除动作时，通过红外触摸设备的红外发射管发射红外光对所述橡皮擦进行扫描；
    数据处理单元，用于根据所述红外触摸设备的红外接收管的接收功率计算所述橡皮擦AGC值、所述橡皮擦遮挡面积以及所述橡皮擦的擦除轨迹。
  8. 根据权利要求6所述的红外触摸设备笔迹擦除系统，其特征在于，其特征在于，还包括：
    书写信息获取模块，用于在所述擦除信息获取模块获取橡皮擦AGC值、橡皮擦遮挡面积以及橡皮擦的擦除轨迹之前，在检测到对红外触摸屏的书写动作时，获取书写笔AGC值和书写笔的移动轨迹；
    书写笔属性获取模块，用于根据所述书写笔AGC值获取对应的书写笔属性；
    书写笔迹显示模块，用于根据所述书写笔属性和所述书写笔的移动轨迹生成书写笔迹在所述红外触摸屏显示，并存储所述书写笔迹与所述书写笔属性的对应关系。
  9. 根据权利要求6所述的红外触摸设备笔迹擦除系统，其特征在于，其 特征在于，还包括：
    设置参数获取模块，用于在所述书写笔属性获取模块根据所述橡皮擦属性与预设的对应关系，得到对应的书写笔属性之前，显示属性设置界面，并接收作用于所述属性设置界面的属性设置参数；
    属性关系存储模块，用于根据所述属性设置参数建立橡皮擦属性与书写笔属性的对应关系并存储。
  10. 根据权利要求6-9任意一项所述的红外触摸设备笔迹擦除系统，其特征在于，其特征在于，所述书写笔属性包括笔迹颜色、笔迹粗细或笔迹类型。
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