WO2018072385A1

WO2018072385A1 - Method and system for extending writing page

Info

Publication number: WO2018072385A1
Application number: PCT/CN2017/077051
Authority: WO
Inventors: 张维元
Original assignee: 广州视源电子科技股份有限公司; 广州视臻信息科技有限公司
Priority date: 2016-10-21
Filing date: 2017-03-17
Publication date: 2018-04-26
Also published as: CN106598289A; CN106598289B

Abstract

A method and a system for extending a writing page. The method comprises: upon detecting that a position of a stylus in a writing operation is within a target border region of a writing page, acquiring a duration of time that the stylus remains in the target border region (S101); comparing the duration of time with a first predetermined time period to obtain a comparison result (S102); and when the comparison result indicates that the duration of time is greater than or equal to the first predetermined time period, determining a scrolling direction of the writing page according to a direction of the target border region relative to the writing page, and scrolling the writing page in the scrolling direction (S103). The duration of time the stylus remains in the target border region of the writing page is acquired and is compared with the first predetermined period of time to determine a page extending intention of a user. When the duration of time is greater than or equal to the first predetermined period of time, it means that the user intends to extend the page, and the writing page is extended in the corresponding scrolling direction. Thus, writing space of a page is extended according to the writing operation of a user, enhancing operational efficiency in extending writing space.

Description

Writing page expansion method and system

Technical field

The present invention relates to the field of page processing technologies, and in particular, to an extended method and system for writing a page.

Background technique

When writing a whiteboard page, there are often cases where a full page is written or a margin is written. In the case where the page can be written with insufficient space, the user often manually adds a new page or Reduce the existing writing strokes or roam the writing strokes to other places to get the available writing space.

According to this scheme, when the writing space on the page is insufficient, the user is required to actively expand the writing space, and the operation efficiency is low, which increases the inconvenience when the user performs the writing operation.

Summary of the invention

Based on this, it is necessary to provide an expansion method and system for writing a page in view of the existing problem of low expansion efficiency when the page writing space is insufficient.

An extension method for writing a page, comprising the following steps:

Obtaining a dwell time of the pen down point in the target boundary area when detecting that the pen down point of the writing operation is within the target boundary area of the writing page;

Comparing the dwell time with the size of the first preset time to obtain a comparison result;

When the comparison result indicates that the dwell time is greater than or equal to the first preset time, the roaming direction of the writing page is determined according to the orientation of the target boundary region with respect to the writing page, and the writing page is roamed in the roaming direction.

An expansion system for writing pages, including the following units:

An obtaining unit, configured to acquire a dwell time of the pen down point in the target boundary area when the pen down point of the writing operation is detected within the target boundary area of the writing page;

a comparing unit, configured to compare the dwell time with the size of the first preset time to obtain a comparison result;

The roaming unit is configured to determine a roaming direction of the writing page according to the orientation of the target boundary area relative to the writing page when the comparison result indicates that the dwell time is greater than or equal to the first preset time, and roam the writing page in the roaming direction.

According to the above expansion method and system for writing a page, when detecting that the pen down point of the writing operation is located in the target boundary region of the writing page, acquiring the dwell time of the pen down point in the target boundary region; comparing the dwell time with the first preset time The size of the comparison result is obtained; when the comparison result indicates that the dwell time is greater than or equal to the first preset time, the roaming direction of the writing page is determined according to the orientation of the target boundary area with respect to the writing page, and the writing page is roamed in the roaming direction. The solution analyzes the position of the falling point of the writing operation, and obtains the dwell time of the falling point in the target boundary area when the falling point is located in the target boundary area of the writing page, and compares it with the first preset time, thereby Identifying the user's extended page intent; when the dwell time is greater than or equal to the first preset time, indicating that the user has an expanded page intent, then determining the roaming direction according to the orientation of the target boundary area relative to the written page, and writing the page along the roaming direction Roaming, thereby expanding the writing space of the page according to the user's writing operation, thereby avoiding requiring the user to actively expand the writing space, and improving the operation efficiency of expanding the writing space.

DRAWINGS

1 is a schematic flow chart of a method for expanding a written page in one embodiment;

2 is a schematic structural diagram of an expansion system for writing a page in one embodiment;

3 is a schematic structural diagram of an expansion system for writing a page in one embodiment;

4 is a schematic structural diagram of an expansion system for writing a page in one embodiment;

Figure 5 is a block diagram showing the structure of an expansion system for writing a page in one embodiment.

detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the scope of the invention.

Referring to FIG. 1 , it is a schematic flowchart of a method for expanding a writing page of the present invention. The image erasing method in this embodiment includes the following steps:

Step S101: Acquire a dwell time of the pen down point in the target boundary area when detecting that the pen down point of the writing operation is located in the target boundary area of the writing page;

Step S102: comparing the dwell time with the size of the first preset time to obtain a comparison result;

Step S103: When the comparison result indicates that the dwell time is greater than or equal to the first preset time, determine the roaming direction of the writing page according to the orientation of the target boundary area with respect to the writing page, and roam the writing page along the roaming direction.

In this embodiment, when it is detected that the pen down point of the writing operation is located in the target boundary area of the writing page, the dwell time of the pen down point in the target boundary area is acquired; the dwell time is compared with the first preset time, and the comparison result is obtained. When the comparison result indicates that the dwell time is greater than or equal to the first preset time, the roaming direction of the writing page is determined according to the orientation of the target boundary area with respect to the writing page, and the writing page is roamed in the roaming direction. The solution analyzes the position of the falling point of the writing operation, and obtains the dwell time of the falling point in the target boundary area when the falling point is located in the target boundary area of the writing page, and compares it with the first preset time, thereby Identify the user's extended page intent; When the dwell time is greater than or equal to the first preset time, it indicates that the user has an expanded page intention, and then the roaming direction is determined according to the orientation of the target boundary region relative to the writing page, and the writing page is roamed in the roaming direction, thereby being The writing operation is used to expand the writing space of the page, thereby avoiding the requirement for the user to actively expand the writing space and improve the operation efficiency of expanding the writing space.

Preferably, before detecting whether the pen down point of the writing operation is located in the target boundary area of the writing page, the user's writing operation data may be collected, including the abscissa and the ordinate of each pen point in the writing page, according to the writing operation data. You can know the position of the pen down point on the writing page. The target boundary area is generally within a few centimeters (such as 3-5 cm) from the page boundary. As long as the writing operation data is collected, it can be determined whether the pen ending point is at the boundary of the writing page. In the region, the target boundary region may be a left boundary region, an upper boundary region, a right boundary region, or a lower boundary region, and the left boundary region, the upper boundary region, the right boundary region, and the lower boundary region are sequentially connected end to end to form a writing page.

Preferably, the roaming direction is determined according to the orientation of the target boundary area with respect to the writing page, and the roaming direction is opposite to the orientation of the target boundary area with respect to the writing page. If the target boundary area is the left border area, the roaming direction is rightward, writing After the page roams to the right, the left side of the writing page expands the corresponding writing space, and the distance of the roaming can be preset as needed.

Preferably, the dwell time includes a writing time of the pen down point in the boundary area of the writing page and a dwell time of the pen down point in the boundary area of the writing page, wherein the dwell time refers to writing a pen in the boundary area of the writing page, but not writing And did not leave the time of writing the border area of the page.

Preferably, in order to enable the expansion of the writing page in time when the user performs the writing operation, the first preset time may be set at the millisecond level.

In one of the embodiments, the target boundary area is the left boundary area of the writing page, and the upper side When overlapping regions of any two adjacent boundary regions in the boundary region, the right boundary region, and the lower boundary region, the corresponding roaming directions are respectively determined according to the orientations of the two adjacent boundary regions with respect to the writing page, and two corresponding The roaming direction vectors are added to obtain a secondary roaming direction, and the writing page is roamed in the secondary roaming direction.

In this embodiment, since the writing pages are generally planar, the left boundary area, the upper boundary area, the right boundary area, and the lower boundary area are connected end to end, enclosing a closed area, and each boundary has a certain width, so The two adjacent boundary regions must have partial overlap regions. When the pen down point is in the overlap region, the roaming direction of the writing page is the vector sum of the roaming directions corresponding to the two adjacent boundary regions, so as to avoid being in the two points due to the pen down point. A boundary area has been expanded and chaotic.

Specifically, if the falling point is in the overlapping area of the left boundary area and the upper boundary area, the roaming direction of the writing page is the lower right direction, and the right direction and the lower direction are both at an angle of 45 degrees, and the roaming distance can be preset according to needs.

In one of the embodiments, the step of roaming the written page in the roaming direction further includes the following steps:

Calculating a first area value of the written page after roaming and a second area value of the written page before roaming;

If the ratio of the first area value to the second area value is greater than or equal to the first preset value, all the writing strokes on the roaming written page are obtained, and all the writing strokes are reduced by a preset ratio, and the reduced writing handwriting is reduced. Move to the writing page before roaming so that the written page before roaming fully displays the reduced writing handwriting.

In this embodiment, after the writing page is expanded, the first area value of the roaming written page and the second area value of the writing page before roaming need to be calculated, when the first area value and the second area value are When the ratio is greater than or equal to the first preset value, it indicates that the extended area of the writing page is too large, and the writing handwriting on the writing page cannot be completely completed on the normal writing page before roaming. Display, at this time, the writing handwriting needs to be reduced to an appropriate size so that it can be fully displayed in the writing page before roaming, and moved to the writing page before roaming, thus preventing the writing page from being excessively expanded, thereby making the writing handwriting too scattered. After the reduction movement process, all the writing strokes can be guaranteed to be displayed in the normal writing page before roaming.

Preferably, the first preset multiple and the preset ratio are corresponding, the first preset multiple is greater than 1, and the preset ratio is less than 1, and the product of the two should be equal to 1 or between 0.8 and 1, so that the reduction can be avoided. The writing strokes are too small.

Preferably, the first preset multiple can be adjusted according to requirements, generally the first preset multiple can be 1.5 times to 2 times, and the reduced writing stroke can be reduced to 50%-60% of the normal size, the first preset multiple And the reduction ratio can be adjusted according to the actual situation.

Preferably, the upper left corner of the smallest rectangle covering the reduced written handwriting is aligned with the upper left corner of the written page before roaming.

In one embodiment, the method for augmenting the page further includes the following steps:

When the target boundary area is an overlapping area of any two adjacent boundary areas in the left boundary area, the upper boundary area, the right boundary area, and the lower boundary area of the writing page, calculating a minimum rectangle covering all writing strokes on the writing page The third area value and the fourth area value of the writing page determine whether the ratio of the third area value to the second area value is greater than or equal to the second preset value, and if so, add a blank page to the writing page.

In this embodiment, since the writing pages are generally planar, the left boundary area, the upper boundary area, the right boundary area, and the lower boundary area are connected end to end, enclosing a closed area, and each boundary has a certain width, so Any two adjacent boundary regions necessarily have a partial overlap region. When the pen down point is in the overlap region, if the ratio of the area value of the smallest rectangle covering the written handwriting to the written page area value is greater than or equal to the second preset multiple, At this point the writing page has been written enough Handwriting, you need to start another page to continue writing, that is, add a blank page to the writing page. Wherein, the range of writing handwriting may be disordered, and the rectangle covering the writing handwriting may be used to represent the range of the writing handwriting, and when the writing handwriting is determined in scope, the smallest rectangle covering the writing handwriting is used to be as close as possible to the writing. The true range of handwriting.

Preferably, the second preset multiple is between 0 and 1, and generally 0.5, 0.6, 0.7, 0.8 or 0.9 may be selected, and the number of pages of the added blank page may be one page.

Preferably, before the blank page is added, the writing page may be a writing page before roaming, or may be a writing page after roaming.

In one of the embodiments, before the step of detecting that the pen down point of the writing operation is within the target boundary area of the writing page, the method further includes the following steps:

The second preset time countdown is started when the pen is written or dropped, and if any writing or pen down operation is detected before the countdown ends, it is determined that the pen down point is in the writing state, and the target of the pen down point where the writing operation is detected is located on the writing page. The step of acquiring the dwell time of the pen down point in the target boundary area when the boundary area is within.

In this embodiment, when writing, the pen down point may leave the writing page for a short time, as long as the writing or pen writing operation is detected within the second preset time countdown from the beginning of the pen down, indicating that the writing state is still in the writing state, the state of the pen If the duration exceeds the third preset time, it can be determined as a continuous writing state. The pen down point is in the continuous writing state, and the dwell time of the pen drop point in the target boundary area is greater than or equal to the first preset time, and the two judgments of the continuous writing state and the dwell time are comprehensively judged, so that the user writes the page space for expansion. The identification of the intent is more accurate, which makes the expansion of the written page more convenient and timely, and improves the user's writing experience.

Preferably, if any writing or pen down operation is detected before the end of the countdown, the second preset time countdown is restarted, so that it can be continuously detected whether the pen down point is in the writing state.

Preferably, after determining that the pen down point is in the writing state, it is determined whether the pen down point is in a continuous writing state, and in order to ensure the accuracy of the judgment, the third preset time is longer than the second preset time.

Preferably, in order to determine the writing state in time when the user performs the writing operation, the second preset time and the third preset time may be set in the millisecond level.

The expansion method of the above written page can be applied to a smart device such as an electronic whiteboard.

Taking an electronic whiteboard as an example, the expansion method of the writing page can be implemented in the software of the electronic whiteboard. When the electronic whiteboard is turned on, a background service is started to monitor whether the user triggers the writing operation, and if so, the writing data is collected, wherein the writing data refers to the abscissa and the ordinate of each pen down point.

After the written data is collected, the writing continuity is determined. A millisecond countdown starts when the user writes or drops the pen. If there is no writing or pen down action at the end of the timer, the writing state is determined to be non-persistent writing. If a writing or pen down action occurs during the countdown of a millisecond, the a millisecond is restarted. Countdown; if it is not in a non-persistent writing state for more than b milliseconds, the writing state is determined to be continuous writing; where b>a.

The pen drop point is within an area of n cm from the boundary of the writing page, and the dwell time in the boundary area is m msec or more. According to the orientation of the boundary area where the pen point is located, the boundary area is divided into upper and lower left and right sides, and the pen point is defined. The boundary area is the primary factor that triggers the expansion of the writing space.

In the state of continuous writing, and the falling point is in any of the upper and lower boundary regions, a corresponding roaming vector is formed to correspond to the up, down, left, and right directions, wherein the direction of the roaming vector is opposite to the orientation of the boundary region, such as The falling point is in the left boundary area, and the direction of the roaming vector is rightward. If the falling point involves two adjacent boundary areas, that is, the falling point is in the overlapping area of two adjacent boundary areas, the corresponding two vectors will be The total vector after vector operation is determined as the final roaming vector, and the final roaming direction is the direction of the total vector; the writing page will roam according to the direction of the roaming vector; the roaming distance can be the average arm length of the human.

After roaming, if the area of the written page after automatic roaming reaches the normal book before roaming Write 150% or more of the page size, reduce the writing stroke to 50% of the normal size, and roam all the writing strokes to the normal writing page before roaming. Preferably, the smallest rectangle covering all writing strokes can be respectively The boundary area is adjacent to the left boundary area.

If the pen point corresponds to two adjacent boundary regions, that is, the pen point is in an overlapping region of two adjacent boundary regions, the area value of the smallest rectangle covering the writing handwriting and the area value of the writing page before roaming can also be calculated, and It is judged whether the area value of the minimum rectangle is greater than or equal to half of the area value of the writing page before roaming, and if so, a blank page can be added to the writing page. Preferably, according to the writing habit, a blank page may be added only when the pen down point is in the overlapping area of the right boundary area and the lower boundary area, and the area value of the minimum rectangle is greater than or equal to half of the area value of the writing page before roaming. page.

In the present invention, ordinal numbers such as "first" and "second" are merely used to distinguish the objects involved, and are not intended to limit the objects themselves.

According to the expansion method of the above-described writing page, the present invention also provides an expansion system for writing a page. Hereinafter, an embodiment of the expansion system of the writing page of the present invention will be described in detail.

Referring to Figure 2, an embodiment of an expansion system for a writing page of the present invention is shown. The expansion system of the writing page in this embodiment includes the following units:

The acquiring unit 210 is configured to acquire a dwell time of the pen down point in the target boundary area when the pen down point of the writing operation is detected in the target boundary area of the writing page;

The comparing unit 220 is configured to compare the dwell time with the size of the first preset time to obtain a comparison result;

The roaming unit 230 is configured to determine, when the comparison result indicates that the dwell time is greater than or equal to the first preset time, determining a roaming direction of the writing page according to the orientation of the target boundary area with respect to the writing page, and roaming the writing page in the roaming direction.

In one embodiment, the roaming unit 230 is further configured to: when the target boundary area is an overlapping area of any two adjacent boundary areas in the left boundary area, the upper boundary area, the right boundary area, and the lower boundary area of the writing page The corresponding roaming directions are respectively determined according to the orientations of the two adjacent boundary regions with respect to the writing page, and the two corresponding roaming direction vectors are added to obtain a secondary roaming direction, and the writing page is roamed in the secondary roaming direction.

In one embodiment, as shown in FIG. 3, the expansion system of the writing page further includes a reduction unit 240 for calculating the first area value of the roaming written page and the second area of the writing page before roaming. a value, if the ratio of the first area value to the second area value is greater than or equal to the first preset value, all the writing strokes on the written page after the roaming are acquired, and all the writing strokes are reduced according to a preset ratio, and the reduced The writing handwriting moves to the writing page before the roaming, so that the writing page before the roaming displays the reduced writing handwriting in a comprehensive manner.

In one embodiment, as shown in FIG. 4, the expansion system of the writing page further includes an adding page unit 250 for using the left boundary area, the upper boundary area, and the right border area of the writing page in the target boundary area. And an overlapping area of any two adjacent boundary areas in the lower boundary area, calculating a third area value of the smallest rectangle covering all writing strokes on the writing page and a fourth area value of the writing page, determining the third area value and Whether the ratio of the second area value is greater than or equal to the second preset value, and if so, adding a blank page to the writing page.

In one embodiment, as shown in FIG. 5, the expansion system of the writing page further includes a state determining unit 260 for starting a second preset time countdown when writing or pen down, and detecting if the countdown ends. If any writing or pen down operation is performed, it is determined that the pen down point is in a writing state; if the pen down point is in a writing state for a duration exceeding a third preset time, determining that the pen down point is in a continuous writing state;

The obtaining unit 210 determines, after the state determining unit 260 determines that the pen down point is in the continuous writing state, When it is detected that the pen down point is within the target boundary area of the writing page, the dwell time of the pen down point in the target boundary area is acquired.

The expansion system of the writing page of the present invention corresponds to the expansion method of the writing page of the present invention, and the technical features and advantages of the embodiment of the method for expanding the writing page are applicable to the embodiment of the expansion system of the writing page. in.

The technical features of the above-described embodiments may be arbitrarily combined. For the sake of brevity of description, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be considered as the scope of this manual.

The above-described embodiments are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but is not to be construed as limiting the scope of the invention. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of the invention should be determined by the appended claims.

Claims

A method for expanding a writing page, comprising the steps of:

Obtaining a dwell time of the pen down point in the target boundary area when detecting that the pen down point of the writing operation is located in a target boundary area of the writing page;

Comparing the residence time with the size of the first preset time to obtain a comparison result;

When the comparison result indicates that the dwell time is greater than or equal to the first preset time, determining a roaming direction of the writing page according to an orientation of the target boundary region with respect to the writing page, and writing the writing page Roam along the roaming direction.
The method for expanding a writing page according to claim 1, further comprising the steps of:

When the target boundary area is an overlapping area of any two adjacent boundary areas of the left boundary area, the upper boundary area, the right boundary area, and the lower boundary area of the writing page, according to the two adjacent Determining a corresponding roaming direction with respect to the orientation of the border area, and adding two corresponding roaming direction vectors to obtain a secondary roaming direction, and roaming the writing page along the secondary roaming direction.
The method for expanding a writing page according to claim 1, wherein the step of roaming the writing page along the roaming direction further comprises the following steps:

Calculating a first area value of the written page after roaming and a second area value of the written page before roaming;

If the ratio of the first area value to the second area value is greater than or equal to the first preset value, all the writing strokes on the roaming written page are obtained, and all the writing strokes are reduced according to a preset ratio, and the writing will be reduced. The subsequent writing handwriting moves to the writing page before the roaming, so that the written page before roaming displays the reduced writing handwriting in a comprehensive manner.
The method for expanding a writing page according to claim 1, further comprising Next steps:

When the target boundary area is an overlapping area of any two adjacent boundary areas in the left boundary area, the upper boundary area, the right boundary area, and the lower boundary area of the writing page, calculating to cover all of the writing pages Writing a third area value of the smallest rectangle of the handwriting and a fourth area value of the writing page, determining whether a ratio of the third area value to the second area value is greater than or equal to a second preset value, and if so, Add a blank page to the writing page.
The method for expanding a writing page according to any one of claims 1 to 4, further comprising the steps of:

Starting a second preset time countdown when writing or dropping the pen, and if any writing or pen down operation is detected before the countdown ends, determining that the pen down point is in a writing state;

If the duration of the writing point in the writing state exceeds the third preset time, determining that the pen down point is in a continuous writing state, and entering the target boundary area where the writing point of the writing operation is located in the writing page And acquiring the dwell time of the pen down point in the target boundary area.
An expansion system for writing a page, comprising the following units:

And an acquiring unit, configured to acquire a dwell time of the pen down point in the target boundary area when the pen down point of the writing operation is detected in a target boundary area of the writing page;

a comparison unit, configured to compare the residence time with a size of the first preset time to obtain a comparison result;

a roaming unit, configured to determine a roaming direction of the writing page according to an orientation of the target boundary area relative to the writing page when the comparison result indicates that the dwell time is greater than or equal to the first preset time, The written page is roamed in the roaming direction.
The expansion system of a writing page according to claim 6, wherein said roaming The unit is further configured to: when the target boundary area is an overlapping area of any two adjacent boundary areas of the left boundary area, the upper boundary area, the right boundary area, and the lower boundary area of the writing page, according to the two The adjacent boundary regions respectively determine a corresponding roaming direction with respect to the orientation of the writing page, and add two corresponding roaming direction vectors to obtain a secondary roaming direction, and the writing page is along the secondary roaming direction roaming.
The expansion system of a writing page according to claim 6, further comprising a reduction unit, wherein the reduction unit is configured to calculate a first area value of the roaming written page and a second area value of the written page before roaming If the ratio of the first area value to the second area value is greater than or equal to the first preset value, all the writing strokes on the roaming written page are obtained, and all writing strokes are reduced according to a preset ratio, and The reduced writing handwriting moves to the writing page before the roaming, so that the written page before roaming displays the reduced writing handwriting in full.
The expansion system of a writing page according to claim 6, further comprising an adding page unit, wherein the adding page unit is configured to be a left boundary area and an upper boundary area of the writing page in the target boundary area, Calculating a third area value of a minimum rectangle covering all writing strokes on the writing page and a fourth area value of the writing page when overlapping regions of any two adjacent boundary regions in the right boundary region and the lower boundary region And determining whether the ratio of the third area value to the second area value is greater than or equal to a second preset value, and if so, adding a blank page to the writing page.
The expansion system of a writing page according to any one of claims 6 to 9, further comprising a state determining unit;

The state determining unit is configured to start a second preset time countdown when writing or pen down, and if any writing or pen down operation is detected before the countdown ends, determining that the pen down point is in a writing state; if the pen down point is in a writing state If the duration exceeds the third preset time, then the pen is determined The point is in a continuous writing state;

The acquiring unit, after the state determining unit determines that the pen down point is in a continuous writing state, acquires the pen down point in the target boundary region when detecting that the pen down point is located in a target boundary region of the writing page The time of stay.