WO2020132863A1 - 续笔方法与显示终端 - Google Patents

续笔方法与显示终端 Download PDF

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Publication number
WO2020132863A1
WO2020132863A1 PCT/CN2018/123451 CN2018123451W WO2020132863A1 WO 2020132863 A1 WO2020132863 A1 WO 2020132863A1 CN 2018123451 W CN2018123451 W CN 2018123451W WO 2020132863 A1 WO2020132863 A1 WO 2020132863A1
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WIPO (PCT)
Prior art keywords
point
coordinates
continuation
coordinate
writing track
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PCT/CN2018/123451
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English (en)
French (fr)
Inventor
张政
Original Assignee
深圳市柔宇科技有限公司
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Application filed by 深圳市柔宇科技有限公司 filed Critical 深圳市柔宇科技有限公司
Priority to CN201880097645.8A priority Critical patent/CN113168254A/zh
Priority to PCT/CN2018/123451 priority patent/WO2020132863A1/zh
Publication of WO2020132863A1 publication Critical patent/WO2020132863A1/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
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means

Definitions

  • the present application relates to the field of input devices, and in particular to a pen continuation method and a display terminal.
  • the application provides a continuation method and a display terminal.
  • a pen renewal method is used in a display terminal.
  • the display terminal includes a touch display screen, which can sense a writing operation and display a writing track.
  • the characteristic is that the pen renewal method includes: Obtain the first coordinate of the starting point of the current writing track and the coordinates of any data points on the existing writing track; determine whether the data exists according to the first coordinates, the coordinates of the arbitrary data points, and a preset distance threshold The distance between the point and the starting point is less than or equal to the distance threshold; if it is, then determine the continuation point on the existing writing track according to the coordinates of the first coordinate and the arbitrary data point and obtain the A second coordinate of the continuation point; and converting coordinates of all data points on the current writing trajectory according to the first coordinate and the second coordinate to form a continuation trajectory.
  • a display terminal includes a touch display screen, which can sense a writing operation and display a writing trajectory.
  • the display terminal further includes a processor, and the processor is used to: obtain the starting point of the current writing trajectory The first coordinate and the coordinates of any data point on the writing track in front; according to the first coordinate, the coordinates of the arbitrary data point, and a preset distance threshold, determine whether there is between the data point and the starting point The distance of is less than or equal to the distance threshold; if it is, then the continuation point on the existing writing track is determined according to the coordinates of the first coordinate and the arbitrary data point and the second coordinate of the continuation point is obtained And converting the coordinates of all data points on the current writing trajectory according to the first coordinate and the second coordinate to form a continuation trajectory.
  • the first coordinate, the preset distance threshold, and the coordinates of any data point are used to determine that the current writing trajectory needs to be continued with the existing writing trajectory.
  • the first coordinate and the second coordinate of the continuation point convert the coordinates of all data points on the current writing trajectory to form a continuation trajectory, so that the existing writing trajectory is connected to the current writing trajectory, improving the coherence and aesthetics of the written content, and improving The user's writing experience.
  • FIG. 1 is a schematic flowchart of a continuation method according to one embodiment of the present application.
  • FIG. 2 is a schematic structural diagram of a display terminal according to one embodiment of the present application.
  • FIG. 3 is a schematic block diagram of a display terminal according to one embodiment of the present application.
  • FIG. 4 to FIG. 6 are schematic diagrams of scenes of a display terminal when resuming a pen according to one embodiment of the present application
  • FIG. 9 is a schematic diagram of a scene of a display terminal according to one embodiment of the present application when resuming a pen;
  • FIG. 12 is a schematic diagram of a scene of a display terminal when resuming a pen according to one embodiment of the present application.
  • FIG. 13 and 14 are schematic flowcharts of the continuation method in one embodiment of the present application.
  • first and second are used for description purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features.
  • the features defined as “first” and “second” may explicitly or implicitly include one or more of the features.
  • the meaning of “plurality” is two or more, unless otherwise specifically limited.
  • the method for resuming a pen is used for a display terminal 10.
  • the display terminal 10 includes a touch screen 12.
  • the touch screen 12 can sense a writing operation and display a writing track.
  • the method for resuming a pen includes step:
  • the display terminal 10 includes a touch display screen 12 that can sense writing operations and display a writing track.
  • the display terminal 10 further includes a processor 14, which can be used to: acquire the first coordinate of the starting point of the current writing track and the coordinates of any data points on the existing writing track in front; according to the first coordinates, the coordinates of any data point and the Set the distance threshold to determine whether the distance between the data point and the starting point is less than or equal to the distance threshold; if it is, then determine the continuation point on the existing writing track according to the coordinates of the first coordinate and any data point and obtain the continuation point The second coordinate; and according to the first coordinate and the second coordinate, convert the coordinates of all data points on the current writing track to form a continuation track.
  • step 02, step 03, step 04 and step 05 may be implemented by the processor 14.
  • the display terminal 10 includes, but is not limited to, smart phones, tablet computers, navigators, smart wearable devices, drawing boards, and other electronic devices that can receive writing operations and display writing trajectories, and users can write, draw, etc. on the display terminal 10 operating.
  • the writing operation can be completed by touch operations on the touch display screen 12 of the display terminal 10, such as a stylus, a finger, etc.
  • the touch display screen 12 can sense touch operations from the outside world (ie, user's writing operations) and convert itself The received touch operation is displayed as a writing track.
  • the user newly writes the current writing trajectory T2, where the starting point of the current writing trajectory T2 is D0, and the first coordinate (that is, the starting point D0 (Coordinates) can be represented by (X0, Y0).
  • the existing writing track T1 is composed of multiple data points
  • the current writing track T2 is also composed of multiple data points, and the position of each data point can be represented by one coordinate.
  • the coordinates of the data points on the existing writing track T1 it is determined whether the current writing track T2 needs to be continued with the existing writing track T1. It can be understood that the current writing trajectory T2 does not necessarily need to be continued with the existing writing trajectory T1 or does not necessarily satisfy the continuation condition. Therefore, it is necessary to first determine whether the current writing trajectory T2 needs to be continued with the existing writing trajectory T1.
  • a distance threshold d may be set, and the size of the distance threshold d may be set and adjusted by the user according to the specific content to be written or the user's writing habits.
  • a reminder message is displayed to remind the user whether resuming is required;
  • the steps of the follow-up continuation method are executed; if the operation that the user does not need the continuation is received, the steps of the follow-up continuation method are not executed.
  • step 04 further includes: highlighting all data points on the existing writing track whose distance from the starting point is less than or equal to the distance threshold d, and highlighting all data points whose distance from the starting point is less than or equal to the distance threshold d Among the data points, the data point selected by the user as the continuation point and acquiring the second coordinate of the continuation point.
  • the highlighting includes processing such as bolding, highlighting, and changing the color of data points. Then go to step 05.
  • step 04 further includes: taking all data points whose distance from the starting point on the existing writing track is less than or equal to the distance threshold d as a pre-continuation pen point; according to the user’s dragging on the touch screen 12 Move the current writing trajectory by moving distance; when the starting point of the current writing trajectory coincides with any of the pre-resumed pen points, the pre-resumed pen point that coincides with the starting point is taken as the resumed point and after translation The current writing track is used as a continuation track.
  • step 05 since the process of translating the current writing trajectory already includes coordinate conversion, step 05 is no longer performed.
  • the touch display screen 12 can obtain the dragging distance of the user on the touch display screen 12 and transmit it to the processor 14.
  • step 04 further includes: taking all data points whose distance from the starting point on the existing writing track is less than or equal to the distance threshold d as a pre-continuation pen point; according to the user’s dragging on the touch screen 12 Moving distance translates the starting point of the current writing trajectory; when the starting point of the current writing trajectory coincides with any of the pre-continued pen points, the pre-continued pen point coincident with the starting point is taken as the continued pen point. Then, through step 05, the remaining data points of the current writing trajectory are converted to form a complete continuation trajectory.
  • the resuming point on the existing writing track T1 is obtained according to the first coordinates (X0, Y0) and the coordinates of any data point on the existing writing track T1, and the second coordinate of the resuming point is obtained,
  • the continuation point is point D1
  • the continuation point D1 can be represented by the second coordinates (X1, Y1).
  • the continuation point D1 After the continuation point D1 is obtained, it is equivalent to obtaining a specific position for continuation of the current writing trajectory T2 to the existing writing trajectory T1, so as to convert the current writing trajectory T2 into a continuation trajectory T3.
  • the position of the starting point D0 is converted into the position of the continuation point D1, according to the positional relationship between the starting point D0 and the continuation point D1, that is, the relationship between the first coordinate (X0, Y0) and the second coordinate (X1, Y1) .
  • the positional relationship between all data points of the current writing trajectory T2 and all data points of the continuation trajectory T3 can be determined, and the current writing trajectory T2 can be converted into the continuation trajectory T3 according to the positional relationship.
  • converting the current writing trajectory T2 to a continuation trajectory T3 is specifically to translate the current writing position according to the positional relationship between the first coordinate (X0, Y0) and the second coordinate (X1, Y1) After writing the track T2, the starting point D0 coincides with the continuation point D1 after translation.
  • the specific shape and positional relationship between the existing writing track and the current writing track are not limited to the above examples. Please refer to FIG. 5 and FIG. 6.
  • the new writing trajectory T4 is used as the current writing trajectory, and the new writing trajectory T4 and the existing writing trajectories T1 and T3 are used Renew the pen and get the renewal track T5.
  • the coordinate system where the first coordinate of the starting point of the current writing track is located, and the coordinate system where the coordinates of any data point on the existing writing track are located may be the coordinate system established in the touch display 12 or may be It is a coordinate system established outside the display terminal 10.
  • the coordinate system where the starting point is located and the coordinate system where any data points are located are always the same coordinate system to ensure that the reference of the coordinates of the starting point and the coordinates of any data points are consistent. All points on the touch display 12 are in the same coordinate system.
  • the coordinate systems in the embodiments of the present application are all two-dimensional coordinate systems.
  • the first coordinate, the preset distance threshold and the coordinates of any data point are used to determine that the current writing trajectory needs to be continued with the existing writing trajectory. Convert the coordinates of all data points on the current writing trajectory according to the first coordinate and the second coordinate of the continuation point to form a continuation trajectory, so that the existing writing trajectory is connected to the current writing trajectory, improving the consistency and aesthetics of the written content, Improve the user's writing experience.
  • the pen continuation method further includes 01: controlling the pen continuation mode entered by the display terminal 10 according to a specific input operation of the user.
  • the display terminal 10 enters the pen continuation mode, it enters the step of acquiring the first coordinate of the starting point of the current writing track and the coordinates of any data points on the existing writing track, that is, entering step 02.
  • the processor 14 is also used to control the pen-continuation mode entered by the display terminal 10 according to a specific input operation of the user.
  • the processor 14 enters the step of acquiring the first coordinate of the starting point of the current writing track and the coordinates of any data points on the existing writing track, that is, implementing step 02.
  • step 01 can be implemented by the processor 14.
  • the user can select whether the display terminal 10 enters the pen-continuation mode.
  • the pen-continuation mode of the display terminal 10 can be turned off, and the user can perform normal For writing operations, multiple writing trajectories formed by the user's writing operations at this time will not be renewed by the above renewal method.
  • the user can also turn on the pen continuation mode of the display terminal 10 to implement the above pen continuation method, which increases the user's freedom to select a writing operation.
  • the specific input operation may specifically be a touch instruction, a voice instruction, a gesture instruction and the like input by the user on the display terminal 10, such as double-clicking the touch display screen 12, sliding on the touch display screen 12 with a predetermined trajectory, and the like.
  • the continuation method before step 04 further includes step 06: judging whether the continuation point on the existing writing track can be confirmed according to the first coordinate and the coordinates of any data point. If it can be confirmed, enter the step of acquiring the continuation point on the existing writing track and acquire the second coordinates of the continuation point, that is, enter step 04.
  • the processor 14 is further used to determine whether the continuation point on the existing writing track can be confirmed according to the first coordinate and the coordinates of any data point. If it can be confirmed, the processor 14 implements the step of acquiring the continuation point on the existing writing trajectory and acquiring the second coordinates of the continuation point, that is, implementing step 04.
  • step 06 can be implemented by the processor 14.
  • the processor 14 determines that the current writing trajectory needs to be continued with the existing writing trajectory (that is, when the distance between the data point and the starting point is less than or equal to the distance threshold), it also needs to determine whether it can be on the existing writing trajectory Confirm the continuation point.
  • the position of the resuming point can be determined without first locating the resuming point, and if it can be confirmed, the position of the resuming point can be further obtained.
  • a reminder signal that the pen-continuation point cannot be confirmed or a reminder signal to re-open the pen may be issued.
  • the processor 14 may issue a reminder signal that cannot confirm the pen-continuation point or a reminder signal to re-open the pen.
  • the prompt signal can be received and responded by the touch screen display 12, and the touch screen display screen 12 can display related pop-up windows, for example, “Unable to confirm the continuation point, please adjust the handwriting or reopen the pen”, when the user selects When “OK”, the user can re-enter or adjust the last input trajectory.
  • the continuation operation is not performed and the current writing trajectory is retained.
  • step 06 judging whether the continuation point on the existing writing track can be confirmed according to the coordinates of the first coordinate and any data point, including the steps:
  • 061 Calculate the distance between all data points on the existing writing track and the starting point according to the first coordinates and the coordinates of any data points;
  • 062 Select the minimum distance value among all distances.
  • the processor 14 is also used to: calculate the distance between all data points on the existing writing track and the starting point according to the first coordinates and the coordinates of any data points; filter among all distances Out the minimum distance value.
  • step 061 and step 062 can be implemented by the processor 14.
  • the first coordinate of the starting point D2 of the current writing track T7 is (X2, Y2), and the coordinates (Xi, Yi) of any data point on the existing writing track T6.
  • the distance d 2i between the starting point D2 and all data points on the existing writing track T6 is calculated.
  • the first coordinate (X2, Y2) and the coordinates of all data points on the existing writing track T6 ( Xi, Yi) calculated for example By substituting the specific coordinates of all data points on the existing writing trajectory T6, the distance between the starting point D2 and all data points of the existing writing trajectory T6 can be obtained. It can be understood that there may be multiple distances.
  • step 062 the multiple distances obtained by performing step 061 are compared, and the minimum value among the multiple distances in the screening, that is, the minimum distance value is compared.
  • the minimum distance value is unique, that is, the distance from the starting point D2 to a certain data point of the existing writing track T6 is the smallest and unique, it indicates that the processor 14 can automatically confirm the continuation point on the existing writing track T6. The smallest data point is confirmed as the continuation point.
  • there are multiple minimum distances that is, the distance from the starting point D2 to at least two data points of the existing writing track T6 are the minimum distance values, it means that the processor 14 cannot automatically confirm the continuation point on the existing writing track T6 .
  • the continuation method further includes steps:
  • the processor 14 is further used to: when the minimum distance values are multiple, control the touch screen to highlight data points corresponding to the multiple minimum distance values; and Among the data points corresponding to the minimum distance value, the data point selected by the user is determined as the continuation point.
  • step 07 and step 08 can be implemented by the processor 14.
  • the processor 14 may highlight the data points D3 and D4 corresponding to the multiple minimum distance values.
  • the data points D3 and D4 are displayed in bold.
  • the user can click on any one of the data points, and the processor 14 determines the selected data point as the continuation point.
  • the processor 14 determines the selected data point as the continuation point.
  • the user can confirm the continuation point by clicking on the data point without inputting the writing track again, improving the writing speed and writing experience.
  • the bold display of the data points corresponding to the multiple minimum distance values is to give the user a more prominent visual effect, so that the user can clearly see and click on the multiple data points, so it is not limited to adding In this way of rough display, multiple data points can also be highlighted, changed in color, etc.
  • step 04 Determine the continuation point on the existing writing track according to the first coordinate and the coordinates of any data point and obtain the second coordinate of the continuation point, including the steps:
  • the processor 14 is further used to: calculate the distance between all data points on the existing writing track and the starting point according to the first coordinates and the coordinates of any data points, and the distance has a unique minimum Distance value; and select the point with the unique minimum distance value as the continuation point.
  • step 041 and step 042 can be implemented by the processor 14.
  • step 02 the first coordinate of the starting point D0 of the current writing track T2 is (X0, Y0), and the coordinates (Xi, Yi) of any data point on the existing writing track T1 are obtained.
  • step 041 the distance d 0i between the starting point D0 and all data points on the existing writing track T1 is calculated. Specifically, the first coordinate (X0, Y0) and the coordinates of all data points on the existing writing track T1 ( Xi, Yi) calculated, for example By substituting the specific coordinates of all data points on the existing writing track T1, the distance between the starting point D0 and all data points of the existing writing track T1 can be obtained. It can be understood that there may be multiple distances.
  • step 05 Transform the coordinates of all data points on the current writing trajectory according to the first coordinate and the second coordinate of the continuation point to form a continuation trajectory, including the steps of:
  • the processor 14 is further used to: calculate the difference between the first coordinate and the second coordinate; use the difference to convert the coordinates of all data points on the current writing track and convert the current
  • the writing trajectory is recorded as a continuation trajectory; and the touch display 12 is controlled to display the continuation trajectory.
  • step 051, step 052 and step 053 can be implemented by the processor 14.
  • the coordinates (X1, Y1) of the sequel point D1 can be obtained.
  • the processor 14 implements step 051
  • the processor 14 implements step 052
  • the coordinates of all the data points on the current writing track T2 and the above-mentioned difference are used to convert to obtain the coordinates of all the data points on the track T3.
  • (XN, YN) represents the coordinates of all data points on the current writing track T2
  • (XM, YM) represents the coordinates of all data points on the trajectory track T3
  • the touch display screen 12 is controlled to display the tracing trajectory T3, and at the same time, the touch display screen 12 can also be controlled not to display the current writing trajectory T2, and the user can directly observe the continuation effect.
  • the user can choose to continue writing to the next writing track, or choose to exit the writing mode, and not to continue writing to the next writing track. Or, if the user is not satisfied with the displayed continuation effect, he can cancel the current continuation operation and rewrite or adjust the current writing trajectory to obtain a satisfactory continuation effect.

Abstract

一种续笔方法与显示终端(10)。该续笔方法用于显示终端(10)，显示终端(10)包括触控显示屏(12)，触控显示屏(12)可感应书写操作并显示书写轨迹。续笔方法包括步骤：获取当前书写轨迹的起点的第一坐标及前面任意一已有书写轨迹上任意数据点的坐标；根据第一坐标、任意数据点的坐标及预设的距离阈值判断当前书写轨迹是否需要与已有书写轨迹续笔；若需要，则根据第一坐标与任意数据点的坐标获取已有书写轨迹上的续笔点；及根据第一坐标及续笔点的第二坐标将当前书写轨迹上所有数据点的坐标转换以形成续笔轨迹，其中，起点与续笔点重合。

Description

续笔方法与显示终端 技术领域
本申请涉及输入设备领域，尤其涉及一种续笔方法与显示终端。
背景技术
用户在智能手机、平板电脑或智能穿戴设备等终端的触控显示屏上进行书写时，如果想连续书写，可能会因为落笔位置不精确，导致线条与线条之间存在一定的距离而不连贯，无法达到理想的书写效果，影响书写的美观度和用户的体验感。
发明内容
本申请提供一种续笔方法与显示终端。
本申请实施方式的种续笔方法用于显示终端，所述显示终端包括触控显示屏，所述触控显示屏可感应书写操作并显示书写轨迹，其特征在于，所述续笔方法包括：获取当前书写轨迹的起点的第一坐标及前面已有书写轨迹上任意数据点的坐标；根据所述第一坐标、所述任意数据点的坐标、及预设的距离阈值判断是否存在所述数据点与所述起点之间的距离小于或等于所述距离阈值；若是，则根据所述第一坐标与所述任意数据点的坐标确定所述已有书写轨迹上的续笔点并获取所述续笔点的第二坐标；及根据所述第一坐标及所述第二坐标将所述当前书写轨迹上所有数据点的坐标转换以形成续笔轨迹。
本申请实施方式的显示终端包括触控显示屏，所述触控显示屏可感应书写操作并显示书写轨迹，所述显示终端还包括处理器，所述处理器用于：获取当前书写轨迹的起点的第一坐标及前面已有书写轨迹上任意数据点的坐标；根据所述第一坐标、所述任意数据点的坐标、及预设的距离阈值判断是否存在所述数据点与所述起点之间的距离小于或等于所述距离阈值；若是，则根据所述第一坐标与所述任意数据点的坐标确定所述已有书写轨迹上的续笔点并获取所述续笔点的第二坐标；及根据所述第一坐标及所述第二坐标将所述当前书写轨迹上所有数据点的坐标转换以形成续笔轨迹。
本申请实施方式的续笔方法与显示终端中，通过第一坐标、预设的距离阈值以及任意数据点的坐标，确定当前书写轨迹需要与已有书写轨迹续笔后，获取续笔点，根据第一坐标及续笔点的第二坐标将当前书写轨迹上所有数据点的坐标转换后形成续笔轨迹，使得已有书写轨迹与当前书写轨迹连接，提高书写内容的连贯度和美观度，提升用户的书写体验。
本申请的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本申请的实践了解到。
附图说明
本申请的上述和/或附加的方面和优点从结合下面附图对实施方式的描述中将变得明显和容易理解，其中：
图1是本申请其中一实施方式的续笔方法的流程示意图；
图2是本申请其中一实施方式的显示终端的结构示意图；
图3是本申请其中一实施方式的显示终端的模块示意图；
图4至图6是本申请其中一实施方式的显示终端在续笔时的场景示意图；
图7及图8是本申请其中一实施方式的续笔方法的流程示意图；
图9是本申请其中一实施方式的显示终端在续笔时的场景示意图；
图10及图11是本申请其中一实施方式的续笔方法的流程示意图；
图12是本申请其中一实施方式的显示终端在续笔时的场景示意图；
图13及图14是本申请其中一实施方式的续笔方法的流程示意图。
具体实施方式
下面详细描述本申请的实施方式，所述实施方式的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施方式是示例性的，仅用于解释本申请，而不能理解为对本申请的限制。
在本申请的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个所述特征。在本申请的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。
下文的公开提供了许多不同的实施方式或例子用来实现本申请的不同结构。为了简化本申请的公开，下文中对特定例子的部件和设置进行描述。当然，它们仅仅为示例，并且目的不在于限制本申请。此外，本申请可以在不同例子中重复参考数字和/或参考字母，这种重复是为了简化和清楚的目的，其本身不指示所讨论各种实施方式和/或设置之间的关系。此外，本申请提供了的各种特定的工艺和材料的例子，但是本领域普通技术人员可以意识到其他工艺的应用和/或其他材料的使用。
请参阅图1至图3，本申请实施方式的续笔方法用于显示终端10，显示终端10包括触控显示屏12，触控显示屏12可感应书写操作并显示书写轨迹，续笔方法包括步骤：
02：获取当前书写轨迹的起点的第一坐标及前面已有书写轨迹上任意数据点的坐标；
03：根据第一坐标、任意数据点的坐标及预设的距离阈值判断是否存在数据点与起点之间的距离小于或等于距离阈值；
04：若是，则根据第一坐标与任意数据点的坐标确定已有书写轨迹上的续笔点并获取续笔点的第二坐标；及
05：根据第一坐标及第二坐标将当前书写轨迹上所有数据点的坐标转换以形成续笔轨迹。
本申请实施方式的显示终端10包括触控显示屏12，触控显示屏12可感应书写操作并显示书写轨迹。显示终端10还包括处理器14，处理器14可用于：获取当前书写轨迹的起点的第一坐标及前面已有书写轨迹上任意数据点的坐标；根据第一坐标、任意数据点的坐标及预设的距离阈值判断是否存在数据点与起点之间的距离小于或等于距离阈值；若是，则根据第一坐标与任意数据点的坐标确定已有书写轨迹上的续笔点并获取续笔点的第二坐标；及根据第一坐标及第二坐标将当前书写轨迹上所有数据点的坐标转换以形成续笔轨迹。
也即是说，步骤02、步骤03、步骤04与步骤05可以由处理器14实现。
具体地，显示终端10包括但不限于智能手机、平板电脑、导航仪、智能穿戴设备、绘图板等可接收书写操作并显示书写轨迹的电子设备，用户可以在显示终端10上进行写字、绘画等操作。书写操作可由手写笔、手指等在显示终端10的触控显示屏12上的触控操作来完成，触控显示屏12可感应来自外界的触控操作(即用户的书写操作)，并将自身所接收到的触控操作显示为书写轨迹。
请结合图4及图5所示的例子，在已有书写轨迹T1的基础上，用户新书写了当前书写轨迹T2，其中，当前书写轨迹T2的起点为D0，第一坐标(即起点D0的坐标)可以由(X0,Y0)表示。当然，已有书写轨迹T1由多个数据点组成，当前书写轨迹T2也由多个数据点组成，且每个数据点的位置均可以由一个坐标表示。
根据第一坐标、已有书写轨迹T1上的数据点的坐标、及预设的距离阈值判断当前书写轨迹T2是否需要与已有书写轨迹T1续笔。可以理解，当前书写轨迹T2并不一定需要与已有书写轨迹T1续笔或不一定满足续笔条件，因此，需要先判断是否需要将当前书写轨迹T2与已有书写轨迹T1续笔。具体地，可以设定一个距离阈值d，距离阈值d的大小可以由用户根据需要书写的具体内容、或用户的书写习惯进行设置和调整。当在已有的书写轨迹上存在与起点的距离小于或等于距离阈值d的数据点时，则表示用户有将当前书写轨迹与已有书写轨迹进行续笔的需求。当在已有的书写轨迹上不存在与起点的距离小于或等于距 离阈值d的数据点时，则表示用户没有将当前书写轨迹与已有书写轨迹进行续笔的需求。在另一个实施例中，当在已有的书写轨迹上存在与起点的距离小于或等于距离阈值d的数据点时，显示一提醒信息提醒用户是否需要进行续笔；若接收到用户需要续笔的操作时，执行后续续笔方法的步骤；若接收到用户不需要续笔的操作时，则不执行后续续笔方法的步骤。
在一实施例中，步骤04还包括：将在已有的书写轨迹上与起点的距离小于或等于距离阈值d的所有数据点突出显示，并将与起点的距离小于或等于距离阈值d的所有数据点之中用户点选操作的数据点作为续笔点并获取续笔点的第二坐标。所述突出显示包括对数据点进行加粗、高亮、改变颜色等处理。再执行步骤05。
在一实施例中，步骤04还包括：将在已有的书写轨迹上与起点的距离小于或等于距离阈值d的所有数据点作为预续笔点；根据用户在触控显示屏12上的拖动距离平移所述当前书写轨迹；当所述当前书写轨迹的起点与任一所述预续笔点重合时，将与所述起点重合的所述预续笔点作为续笔点并将平移后的所述当前书写轨迹作为续笔轨迹。在本实施例中，由于平移所述当前书写轨迹的过程已经包含了坐标转换，因此不再执行步骤05。触控显示屏12可获取用户在触控显示屏12上的拖动距离并传输给处理器14。
在一个实施例中，步骤04还包括：将在已有的书写轨迹上与起点的距离小于或等于距离阈值d的所有数据点作为预续笔点；根据用户在触控显示屏12上的拖动距离平移所述当前书写轨迹的起点；当所述当前书写轨迹的起点与任一所述预续笔点重合时，将与所述起点重合的所述预续笔点作为续笔点。再通过步骤05将当前书写轨迹的其余数据点进行转换以形成完整的续笔轨迹。
在判断需要续笔后，则根据第一坐标(X0,Y0)与已有书写轨迹T1上任意数据点的坐标获取已有书写轨迹T1上的续笔点并获取续笔点的第二坐标，如图4所示的例子中，续笔点为点D1，续笔点D1可以由第二坐标(X1,Y1)表示。
获取到续笔点D1后，则相当于获取了将当前书写轨迹T2续笔到已有书写轨迹T1上的具体位置，以将当前书写轨迹T2转换成续笔轨迹T3。具体地，将起点D0的位置转换为续笔点D1的位置，依据该起点D0与续笔点D1的位置关系，即第一坐标(X0,Y0)与第二坐标(X1,Y1)的关系，可以确定当前书写轨迹T2的所有数据点与续笔轨迹T3的所有数据点的位置关系，并依据该位置关系将当前书写轨迹T2转换成续笔轨迹T3。
在一个实施例中，将当前书写轨迹T2转换为续笔轨迹T3具体为，根据所述第一坐标(X0,Y0)与第二坐标(X1,Y1)之间的位置关系，平移所述当前书写轨迹T2，平移后所述起点D0与续笔点D1重合。
当然，已有书写轨迹与当前书写轨迹的具体形状、位置关系等不限于上述举例，请参 阅图5及图6，进一步地，当续笔完成后，用户再次书写新的书写轨迹T4时，在该新的书写轨迹T4前已有的轨迹(T1及T3)均作为已有书写轨迹，该新的书写轨迹T4作为当前书写轨迹，并将该新的书写轨迹T4与已有书写轨迹T1及T3续笔，得到续笔轨迹T5。
另外，当前书写轨迹的起点的第一坐标所处的坐标系、以及已有书写轨迹上任意数据点的坐标所处的坐标系，可以是在触控显示屏12内建立的坐标系，也可以是在显示终端10外建立的坐标系。起点所处的坐标系与任意数据点所处的坐标系始终为同一坐标系，以保证起点的坐标以及任意数据点的坐标的参照一致。触控显示屏12上的所有点均处于同一坐标系内。本申请的实施例中的坐标系均为二维坐标系。
本申请实施方式的续笔方法与显示终端10中，通过第一坐标、预设的距离阈值以及任意数据点的坐标，确定当前书写轨迹需要与已有书写轨迹续笔后，获取续笔点，根据第一坐标及续笔点的第二坐标将当前书写轨迹上所有数据点的坐标转换后形成续笔轨迹，使得已有书写轨迹与当前书写轨迹连接，提高书写内容的连贯度和美观度，提升用户的书写体验。
请参阅图7，在某些实施方式中，续笔方法还包括01：根据用户的特定输入操作控制显示终端10进入的续笔模式。当显示终端10进入续笔模式时，进入获取当前书写轨迹的起点的第一坐标及前面已有书写轨迹上任意数据点的坐标的步骤，即进入步骤02。
请结合图3，在某些实施方式中，处理器14还用于根据用户的特定输入操作控制显示终端10进入的续笔模式。当显示终端10处于续笔模式时，处理器14进入获取当前书写轨迹的起点的第一坐标及前面已有书写轨迹上任意数据点的坐标的步骤，即实施步骤02。
也即是说，步骤01可以由处理器14实现。
用户可以选择显示终端10是否进入续笔模式，当用户使用显示终端10进行书写操作而无需续笔时，可将显示终端10的续笔模式关闭，用户可在触控显示屏12上进行正常的书写操作，此时用户的书写操作所形成的多个书写轨迹不会通过上述的续笔方法进行续笔。用户也可以将显示终端10的续笔模式开启以实施上述的续笔方法，增加用户选择书写操作的自由度。其中，特定输入操作具体可以是用户在显示终端10上输入的触控指令、声音指令、手势指令等指令，例如双击触控显示屏12、在触控显示屏12上以预定轨迹滑动等。
请参阅图8，在某些实施方式中，续笔方法在步骤04之前还包括步骤06：根据第一坐标与任意数据点的坐标判断是否能够确认已有书写轨迹上的续笔点。若能够确认，则进入获取已有书写轨迹上的续笔点并获取续笔点的第二坐标的步骤，即进入步骤04。
请结合图3，在某些实施方式中，处理器14还用于根据第一坐标与任意数据点的坐标判断是否能够确认已有书写轨迹上的续笔点。若能够确认，处理器14则实施获取已有书写轨迹上的续笔点并获取续笔点的第二坐标的步骤，即实施步骤04。
也即是说，步骤06可以由处理器14实现。
具体地，在处理器14判断当前书写轨迹需要与已有书写轨迹续笔后(即存在数据点与起点之间的距离小于或等于距离阈值时)，还需要判断是否能在已有书写轨迹上确认到续笔点。在实施步骤06时，可以不先定位续笔点的位置，先判断是否能够在已有书写轨迹上确认续笔点，并在能够确认时，再进一步获取续笔点的位置。而在无法确认续笔点时，可以发出无法确认续笔点的提示信号或者发出重新落笔的提示信号，具体可以是处理器14发出无法确认续笔点的提示信号或者重新落笔的提示信号。请结合图9，该提示信号可以由触控显示屏12接收并响应，触控显示屏12可以显示相关弹窗，例如显示“无法确认续笔点，请调整笔迹或重新落笔”，当用户选择“确定”时，用户可以重新输入或调整上一次输入的书写轨迹，当用户选择“取消”时，不进行续笔操作，保留当前的书写轨迹。
请参阅图10，在某些实施方式中，步骤06：根据第一坐标与任意数据点的坐标判断是否能够确认已有书写轨迹上的续笔点，包括步骤：
061：根据第一坐标及任意数据点的坐标计算已有书写轨迹上所有数据点与起点之间的距离；
062：在所有距离中筛选出最小距离值。
请结合图3，在某些实施方式中，处理器14还用于：根据第一坐标及任意数据点的坐标计算已有书写轨迹上所有数据点与起点之间的距离；在所有距离中筛选出最小距离值。
也即是说，步骤061及步骤062可以由处理器14实现。
请结合图9，在步骤02中得到当前书写轨迹T7的起点D2的第一坐标为(X2，Y2)，及已有书写轨迹T6上的任意数据点的坐标(Xi，Yi)。步骤061中，计算起点D2与已有书写轨迹T6上所有数据点之间的距离d 2i，具体地，可以通过第一坐标(X2，Y2)与已有书写轨迹T6上所有数据点的坐标(Xi，Yi)计算得到，例如
Figure PCTCN2018123451-appb-000001
通过代入已有书写轨迹T6上所有数据点的具体坐标，可以求得起点D2与已有书写轨迹T6所有数据点之间的距离，可以理解，该距离可以有多个。
步骤062中，将通过实施步骤061求得的多个距离进行比较，筛选中多个距离中的最小值，即最小距离值。当该最小距离值唯一的，即起点D2到已有书写轨迹T6的某一个数据点的距离最小且唯一，则表明处理器14能够自动确认已有书写轨迹T6上的续笔点，所述距离最小的数据点确认为续笔点。当该最小距离为多个时，即起点D2至已有书写轨迹T6的至少两个数据点的距离均为最小距离值，则表明处理器14不能自动确认已有书写轨迹T6上的续笔点。
请参阅图11，在某些实施方式中，续笔方法还包括步骤：
07：当最小距离值为多个时，控制触控显示屏12将多个最小距离值对应的数据点突出 显示；及
08：将在多个最小距离值对应的数据点之中被用户点选操作的数据点确定为续笔点。
请结合图3，在某些实施方式中，处理器14还用于：当最小距离值为多个时，控制触控显示屏将多个最小距离值对应的数据点突出显示；及将在多个最小距离值对应的数据点之中被用户点选操作的数据点确定为续笔点。
也即是说，步骤07与步骤08可以由处理器14实现。
请参阅图12，当该最小距离为多个时，即起点D2到已有书写轨迹T6的至少两个数据点(例如图中的数据点D3及D4)的距离均为最小距离值，则处理器14难以预测用户希望将续笔点定位在哪个位置。此时处理器14可将该具有多个最小距离值对应的数据点D3及D4突出显示，在如图12的例子中，数据点D3及D4被加粗显示。用户此时通过察看触控显示屏12可以知晓有多个数据点均可能是续笔点，且由于该多个续笔点被加粗显示，用户知道其具体位置。用户可以点选其中的任意一个数据点，处理器14将该被点选的数据点确定为续笔点。如此，在有多个数据点均可能是续笔点的情况下，用户可以通过点选数据点的方式确认续笔点，而不需要再次输入书写轨迹，提升书写速度及书写体验。可以理解的是，对多个最小距离值对应的数据点加粗显示是为了给予用户更加突出的视觉效果，以便用户能清楚地看到并点选多个所述数据点，因此并不限于加粗显示这一方式，还可以对多个所述数据点进行高亮、改变颜色等处理。
请参阅图13，在某些实施方式中，步骤04：根据第一坐标与任意数据点的坐标确定已有书写轨迹上的续笔点并获取续笔点的第二坐标，包括步骤：
041：根据第一坐标及任意数据点的坐标计算已有书写轨迹上所有数据点与起点之间的距离，距离中具有唯一最小距离值；及
042：选取具有唯一最小距离值的点作为续笔点。
请结合图3，在某些实施方式中，处理器14还用于：根据第一坐标及任意数据点的坐标计算已有书写轨迹上所有数据点与起点之间的距离，距离中具有唯一最小距离值；及选取具有唯一最小距离值的点作为续笔点。
也即是说，步骤041与步骤042可以由处理器14实现。
请结合图4及图5，在步骤02中得到当前书写轨迹T2的起点D0的第一坐标为(X0，Y0)，及已有书写轨迹T1上的任意数据点的坐标(Xi，Yi)。步骤041中，计算起点D0与已有书写轨迹T1上所有数据点之间的距离d 0i，具体地，可以通过第一坐标(X0，Y0)与已有书写轨迹T1上所有数据点的坐标(Xi，Yi)计算得到，例如
Figure PCTCN2018123451-appb-000002
通过代入已有书写轨迹T1上所有数据点的具体坐标，可以求得起点D0与已有书写轨迹T1所有数据点之间的距离，可以理解，该距离可以有多个。 当距离中具有唯一最小距离值，即，使得d 0i最小的数据点唯一时，如图4及图5中的D1点，在多个距离d 0i中，
Figure PCTCN2018123451-appb-000003
最小且唯一，此时，可以选取D1为续笔点。请参阅图14，在某些实施方式中，步骤05：根据第一坐标及续笔点的第二坐标将当前书写轨迹上所有数据点的坐标转换以形成续笔轨迹，包括步骤：
051：计算第一坐标与第二坐标的差值；
052：利用差值转换当前书写轨迹上所有数据点的坐标并将转换后的当前书写轨迹记为续笔轨迹；及
053：控制触控显示屏12显示续笔轨迹。
请结合图3，在某些实施方式中，处理器14还用于：计算第一坐标与第二坐标的差值；利用差值转换当前书写轨迹上所有数据点的坐标并将转换后的当前书写轨迹记为续笔轨迹；及控制触控显示屏12显示续笔轨迹。
也即是说步骤051、步骤052与步骤053可以由处理器14实现。
请结合图4及图5，实施步骤04获取到续笔点D1后，即可以获取续笔点D1的坐标(X1，Y1)。处理器14实施步骤051时，计算第一坐标(X0，Y0)与第二坐标(X1，Y1)的差值，差值ΔX＝X1-X0、ΔY＝Y1-Y0。处理器14实施步骤052时，利用当前书写轨迹T2上所有数据点的坐标与上述差值，转换得到续笔轨迹T3上所有数据点的坐标。具体地，以(XN，YN)表示当前书写轨迹T2上所有数据点的坐标，以(XM，YM)表示续笔轨迹T3上所有数据点的坐标，则XM＝XN+ΔX＝XN+X1-X0，且YM＝YN+ΔY＝YN+Y1-Y0，以此得到当前书写轨迹T2上所有数据点转换为续笔轨迹T3后的所有数据点的坐标。由于已经获取续笔轨迹T3的所有数据点的坐标，因此，只需要将该多个转换后的多个数据点按顺序连接则可以拟合成续笔轨迹T3。处理器14实施步骤053时，控制触控显示屏12显示续笔轨迹T3，同时，还可以控制触控显示屏12不再显示当前书写轨迹T2，用户可以直接观察到续笔效果。
进一步地，当前书写轨迹续笔结束后，用户可选择继续对下一笔书写轨迹续笔，也可以选择退出续笔模式，不对下一笔书写轨迹续笔。或者，如果用户对显示出来的续笔效果不满意，可撤销当前的续笔操作，重新书写或调整当前书写轨迹，以得到满意的续笔效果。
在本说明书的描述中，参考术语“一个实施方式”、“某些实施方式”、“示意性实施方式”、“示例”、“具体示例”、或“一些示例”等的描述意指结合所述实施方式或示例描述的具体特征、结构、材料或者特点包含于本申请的至少一个实施方式或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施方式或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施方式或示例中以合适的方式结合。
尽管已经示出和描述了本申请的实施方式，本领域的普通技术人员可以理解：在不脱离本申请的原理和宗旨的情况下可以对这些实施方式进行多种变化、修改、替换和变型，本申请的范围由权利要求及其等同物限定。

Claims (16)

  1. 一种续笔方法，用于显示终端，所述显示终端包括触控显示屏，所述触控显示屏可感应书写操作并显示书写轨迹，其特征在于，所述续笔方法包括：
    获取当前书写轨迹的起点的第一坐标及前面已有书写轨迹上任意数据点的坐标；
    根据所述第一坐标、所述任意数据点的坐标、及预设的距离阈值判断是否存在所述数据点与所述起点之间的距离小于或等于所述距离阈值；
    若是，则根据所述第一坐标与所述任意数据点的坐标确定所述已有书写轨迹上的续笔点并获取所述续笔点的第二坐标；及
    根据所述第一坐标及所述第二坐标将所述当前书写轨迹上所有数据点的坐标转换以形成续笔轨迹。
  2. 根据权利要求1所述的续笔方法，其特征在于，所述续笔方法在获取当前书写轨迹的起点的第一坐标及前面已有书写轨迹上任意数据点的坐标之前，还包括：
    根据用户的特定输入操作控制所述显示终端进入续笔模式。
  3. 根据权利要求1所述的续笔方法，其特征在于，所述续笔方法在根据所述第一坐标与所述任意数据点的坐标确定所述已有书写轨迹上的续笔点并获取所述续笔点的第二坐标之前，还包括：
    根据所述第一坐标与所述任意数据点的坐标判断是否能够确认所述已有书写轨迹上的续笔点；及
    若能够确认所述已有书写轨迹上的续笔点，则进入获取所述已有书写轨迹上的续笔点并获取所述续笔点的第二坐标的步骤。
  4. 根据权利要求3所述的续笔方法，其特征在于，所述续笔方法还包括：
    若无法确认，则发出无法确认续笔点或重新落笔的提示信号。
  5. 根据权利要求3所述的续笔方法，其特征在于，所述根据所述第一坐标与所述任意数据点的坐标判断是否能够确认所述已有书写轨迹上的续笔点，包括：
    根据所述第一坐标及所述任意数据点的坐标计算所述已有书写轨迹上所有数据点与所述起点之间的距离；及
    在所有所述距离中筛选出最小距离值。
  6. 根据权利要求5所述的续笔方法，其特征在于，所述续笔方法还包括：
    当所述最小距离值为多个时，控制所述触控显示屏将多个所述最小距离值对应的数据点突出显示；及
    将在多个所述最小距离值对应的数据点之中被用户点选操作的所述数据点确定为所述续笔点。
  7. 根据权利要求1所述的续笔方法，其特征在于，所述根据所述第一坐标与所述任意数据点的坐标确定所述已有书写轨迹上的续笔点并获取所述续笔点的第二坐标，包括：
    根据所述第一坐标及所述任意数据点的坐标计算所述已有书写轨迹上所有数据点与所述起点之间的距离，所述距离中具有唯一最小距离值；及
    选取具有所述唯一最小距离值的点作为续笔点。
  8. 根据权利要求1所述的续笔方法，其特征在于，根据所述第一坐标及所述第二坐标将所述当前书写轨迹上所有数据点的坐标转换以形成续笔轨迹，包括：
    计算所述第一坐标与所述第二坐标的差值；
    利用所述差值转换所述当前书写轨迹上所有数据点的坐标并将转换后的所述当前书写轨迹记为续笔轨迹；及
    控制所述触控显示屏显示所述续笔轨迹。
  9. 一种显示终端，其特征在于，所述显示终端包括触控显示屏，所述触控显示屏可感应书写操作并显示书写轨迹，所述显示终端还包括处理器，所述处理器用于：
    获取当前书写轨迹的起点的第一坐标及前面已有书写轨迹上任意数据点的坐标；
    根据所述第一坐标、所述任意数据点的坐标、及预设的距离阈值判断是否存在所述数据点与所述起点之间的距离小于或等于所述距离阈值；
    若是，则根据所述第一坐标与所述任意数据点的坐标确定所述已有书写轨迹上的续笔点并获取所述续笔点的第二坐标；及
    根据所述第一坐标及所述第二坐标将所述当前书写轨迹上所有数据点的坐标转换以形成续笔轨迹。
  10. 根据权利要求9所述的显示终端，其特征在于，所述处理器在用于获取当前书写轨迹的起点的第一坐标及前面已有书写轨迹上任意数据点的坐标之前，还用于：
    根据用户的特定输入操作控制所述显示终端进入续笔模式。
  11. 根据权利要求9所述的显示终端，其特征在于，所述处理器在根据所述第一坐标与所述任意数据点的坐标确定所述已有书写轨迹上的续笔点并获取所述续笔点的第二坐标之前，还用于：
    根据所述第一坐标与所述任意数据点的坐标判断是否能够确认所述已有书写轨迹上的续笔点；及
    若能够确认所述已有书写轨迹上的续笔点，则进入获取所述已有书写轨迹上的续笔点并获取所述续笔点的第二坐标的步骤。
  12. 根据权利要求11所述的显示终端，其特征在于，所述处理器还用于：
    若无法确认，则发出无法确认续笔点或重新落笔的提示信号。
  13. 根据权利要求11所述的显示终端，其特征在于，所述处理器还用于：
    根据所述第一坐标及所述任意数据点的坐标计算所述已有书写轨迹上所有数据点与所述起点之间的距离；及
    在所有所述距离中筛选出最小距离值。
  14. 根据权利要求13所述的显示终端，其特征在于，所述处理器还用于：
    当所述最小距离值为多个时，控制所述触控显示屏将多个所述最小距离值对应的数据点突出显示；及
    将在多个所述最小距离值对应的数据点之中被用户点选操作的所述数据点确定为所述续笔点。
  15. 根据权利要求9所述的显示终端，其特征在于，所述处理器还用于：
    根据所述第一坐标及所述任意数据点的坐标计算所述已有书写轨迹上所有数据点与所述起点之间的距离，所述距离中具有唯一最小距离值；及
    选取具有所述唯一最小距离值的点作为续笔点。
  16. 根据权利要求9所述的显示终端，其特征在于，所述处理器还用于：
    计算所述第一坐标与所述第二坐标的差值；
    利用所述差值转换所述当前书写轨迹上所有数据点的坐标并将转换后的所述当前书写轨迹记为续笔轨迹；及
    控制所述触控显示屏显示所述续笔轨迹。
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