CN114879869A - Note erasing method, electronic device and computer storage medium - Google Patents
Note erasing method, electronic device and computer storage medium Download PDFInfo
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- CN114879869A CN114879869A CN202210505089.1A CN202210505089A CN114879869A CN 114879869 A CN114879869 A CN 114879869A CN 202210505089 A CN202210505089 A CN 202210505089A CN 114879869 A CN114879869 A CN 114879869A
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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
- G06F3/046—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by electromagnetic means
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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
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
- G06F3/03545—Pens or stylus
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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
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/038—Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry
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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
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/04162—Control or interface arrangements specially adapted for digitisers for exchanging data with external devices, e.g. smart pens, via the digitiser sensing hardware
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Abstract
The invention discloses a note erasing method, electronic equipment and a computer storage medium, wherein the method comprises the following steps: responding to the erasing operation in the current page, and determining an erasing track according to report point data generated by the erasing operation; screening all strokes of a current page to obtain at least one target stroke, wherein a first preset surrounding area of the target stroke is overlapped with a preset surrounding area of an erasing track; acquiring a central line of a preset width of at least one target stroke according to the report point data of at least one target stroke; and if the central line of any item stroke mark intersects with the erasing track, erasing the item stroke mark. By the mode, the erasing effect is more suitable for the intention of the user, the erasing precision is higher, the accuracy of erasing the note can be improved, the calculation range can be reduced, and further the calculation resource is saved and the calculation time is reduced.
Description
Technical Field
The invention relates to the technical field of computers, in particular to a note erasing method, electronic equipment and a computer storage medium.
Background
Currently, with the popularization of mobile terminals and the development of electronic book readers, electronic books are more and more favored by readers. Meanwhile, in order to further improve the use experience of the user of the electronic book, more and more electronic book readers are configured with an electromagnetic plate and an electromagnetic pen, so that the user is supported to use the electromagnetic pen to write a note on a screen of the reader by hand, and the user can erase the written note by performing an operation.
The existing note erasing method comprises track erasing and range erasing, wherein track erasing refers to erasing crossed strokes along the moving track of the eraser, and range erasing refers to erasing strokes in a range selected by a user.
Disclosure of Invention
In view of the above, the present invention has been made to provide a note erasing method, an electronic device, and a computer storage medium that overcome or at least partially solve the above problems.
According to an aspect of the present invention, there is provided a note erasing method, including:
responding to the erasing operation in the current page, and determining an erasing track according to report point data generated by the erasing operation; screening all strokes of a current page to obtain at least one target stroke, wherein a first preset surrounding area of the target stroke is overlapped with a preset surrounding area of an erasing track; acquiring a central line of a preset width of at least one target stroke according to the report point data of at least one target stroke; and if the central line of any item stroke mark intersects with the erasing track, erasing the item stroke mark.
According to still another aspect of the present invention, there is provided an electronic apparatus including: the system comprises a processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface complete mutual communication through the communication bus;
the memory is used for storing at least one executable instruction, and the executable instruction causes the processor to execute the following operations:
responding to the erasing operation in the current page, and determining an erasing track according to report point data generated by the erasing operation; screening all strokes of a current page to obtain at least one target stroke, wherein a first preset surrounding area of the target stroke is overlapped with a preset surrounding area of an erasing track; acquiring a central line of a preset width of at least one target stroke according to the report point data of at least one target stroke; and if the central line of any item stroke mark intersects with the erasing track, erasing the item stroke mark.
According to yet another aspect of the present invention, there is provided a computer storage medium having at least one executable instruction stored therein, the executable instruction causing a processor to:
responding to the erasing operation in the current page, and determining an erasing track according to report point data generated by the erasing operation; screening all strokes of a current page to obtain at least one target stroke, wherein a first preset surrounding area of the target stroke is overlapped with a preset surrounding area of an erasing track; acquiring a central line of a preset width of at least one target stroke according to the report point data of at least one target stroke; and if the central line of any item stroke mark intersects with the erasing track, erasing the item stroke mark.
According to the note erasing method, the electronic equipment and the computer storage medium, the erasing track is determined according to the report point data generated by the erasing operation in response to the erasing operation in the current page; screening all strokes of a current page to obtain at least one target stroke, wherein a first preset surrounding area of the target stroke is overlapped with a preset surrounding area of an erasing track; acquiring a central line of a preset width of at least one target stroke according to the report point data of at least one target stroke; and if the central line of any item stroke mark intersects with the erasing track, erasing the item stroke mark. By the mode, the target stroke overlapped by the first preset surrounding area and the preset surrounding area of the erasing track is searched, the central line with the preset width is drawn according to the report data of the target stroke, whether the central line is intersected with the erasing track or not is judged, if the central line is intersected with the erasing track, the entry marking stroke is erased, factors such as the thickness of the stroke and the stroke front can be ignored to reduce the calculated amount, the phenomenon that the erasing track is close to the edge of the stroke to cause the erasing of the note can be avoided, the erasing track is determined to be intersected with the central line of the stroke and then the erasing is performed, the erasing effect is more suitable for the intention of a user, the erasing precision is higher, and the accuracy of erasing the note can be improved; and for other strokes of which the first preset surrounding area is not overlapped with the preset surrounding area of the erasing track, subsequent processing such as connection, judgment and the like is not performed, so that the calculation range can be narrowed, the calculation resources are saved, and the calculation time is shortened.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a flow chart illustrating a note erasing method provided by an embodiment of the invention;
FIG. 2 is a flow chart illustrating a note erasing method provided by another embodiment of the invention;
FIG. 3 is a flow chart illustrating a note erasing method provided by another embodiment of the invention;
fig. 4 shows a schematic structural diagram of an electronic device provided in an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Fig. 1 shows a flowchart of a note erasing method provided by an embodiment of the present invention, which is applied to an ink screen device, as shown in fig. 1, and the method includes the following steps:
step S110, in response to the erasing operation in the current page, determining an erasing track according to the breakpoint data generated by the erasing operation.
Wherein the current page is a page in an electronic reading scene, for example, a reading page of an electronic book, a directory page of the electronic book, and the like. The user can write notes aiming at the presented content through the electromagnetic pen during reading by using the ink screen device, for example, the user can write notes by handwriting, such as a feeling of writing down the book content in the current reading page during reading the book, underlining or circling added to the book content, and the like.
The erasing operation is used for erasing the note strokes written by the user in the current page, and can be triggered by an electromagnetic pen or a finger of the user, for example, the user clicks a preset erasing function inlet in the current page to enter an erasing mode, after the erasing mode is entered, the operation generated in a screen by using the electromagnetic pen is identified as the erasing operation, an electromagnetic plate of an ink screen acquires the report point data generated when a pen point contacts the screen in real time, and the erasing track is determined according to the acquired report point data.
The method comprises the steps that point reporting data comprise coordinate information, pressure information, time information, speed information and the like of a track from pen falling to pen lifting, specifically, all point reporting coordinates in the point reporting data generated by erasing operation are connected into a line according to time precedence relationship, then a connecting line between every two points is drawn into a rectangle according to the preset erasing track width, if the two adjacent rectangles are not continuous in disconnection, the two adjacent rectangles are connected through a smooth circular arc, and finally a complete and smooth erasing track is obtained.
And step S120, screening all strokes of the current page to obtain at least one target stroke, wherein a first preset surrounding area of the target stroke is overlapped with a preset surrounding area of an erasing track.
The strokes in the current page are the strokes of the notes that the user has written before entering the erase mode.
The first preset surrounding area of the stroke is determined according to the report point coordinate information and the time information in the report point data of the stroke, the first preset surrounding area surrounds the report point coordinates, the first preset surrounding area does not consider the display effects of the thickness, the stroke front and the like of the stroke, for example, the report point coordinates are connected according to the time sequence, the width of the connecting line is a preset value, the first preset surrounding area can be the minimum circumscribed rectangular area of the connecting line, the target stroke is searched according to the first preset surrounding area, the first preset surrounding area is determined according to the actually rendered stroke instead of searching the target stroke, the calculated amount can be reduced, and the accuracy is higher.
The preset enclosing region of the erasing track is a region enclosing the erasing track, and may be a minimum circumscribed rectangular region of the erasing track, or a region obtained by amplifying the minimum circumscribed rectangular region of the erasing track according to a specified multiple.
After the erasing track is obtained, determining a preset surrounding area of the erasing track, and screening to obtain at least one target stroke of which the first preset surrounding area is intersected with or overlapped with the preset surrounding area of the erasing track according to the coordinate information of the first preset surrounding area of each stroke and the coordinate information of the preset surrounding area of the erasing track.
Step S130, obtaining a center line of the preset width of at least one target stroke according to the report point data of at least one target stroke.
And aiming at any target stroke, connecting the coordinates of all report points contained in the report point data of the target stroke by using a connecting line with a preset width according to a time sequence to obtain the central line of the entry mark stroke.
In practical applications, the pressure of a touch screen, the thickness of a brush pen set by a user, the type of the selected brush pen, and the like when the user writes a note all affect the display thickness of the stroke, for example, the greater the force of touching the screen, the thicker the handwritten stroke, the thinner the stroke written by a pencil compared with the stroke written by a mark pen, and the thickness of the brush pen can also be set by the user himself, and the tip of the brush pen can be generated due to the pressure factor when writing the note.
It should be noted that the stroke is obtained by connecting the coordinates of each report point according to a time sequence, but the thickness of the stroke during display is influenced by the above factors, and the center line of the stroke is also obtained by connecting the coordinates of each report point according to a time sequence, but the width of the center line of the stroke is a preset width, which is not influenced by the above factors, for example, the preset width may be the size of a pixel level.
In step S140, if the center line of any entry stroke mark intersects with the erasing track, the entry stroke mark is erased.
After obtaining the central line of the target stroke, detecting whether pixel point coordinates coincide with pixel point coordinates of an erasing track exists in the central line, if at least one pixel point coordinate coincides with the pixel point coordinates of the erasing track exists in the central line, judging that the central line is intersected with the erasing track, and erasing the entry stroke, so that the entry stroke is not displayed in a screen; on the contrary, if the pixel point coordinates do not coincide with the pixel point coordinates of the erasing track in the central line, the central line is judged not to intersect with the erasing track, the item stroke is marked as a stroke which does not need to be erased, and the item stroke is marked without processing.
According to the note erasing method of the embodiment, firstly, a target stroke with a first preset surrounding area overlapped with a preset surrounding area of an erasing track is searched, a center line with a preset width is drawn according to report data of the target stroke, whether the center line is intersected with the erasing track or not is judged, if the center line is intersected with the erasing track, the entry marking stroke is erased, so that the entry marking stroke is not displayed in a screen, through the mode, factors such as the thickness of the stroke and the stroke front can be ignored to reduce the calculated amount, the phenomenon that the erasing track is close to the edge of the stroke to cause the note to be erased can be avoided, and the erasing track is determined to be intersected with the center line of the stroke and then erased, so that the erasing effect is more suitable for the intention of a user, the erasing precision is higher, and the accuracy of erasing the note can be improved; for other strokes of which the first preset surrounding area does not overlap with the preset surrounding area of the erasing track, subsequent processing such as connection, judgment and the like is not performed, so that the calculation range can be narrowed, the calculation resources are saved, and the calculation time is shortened.
FIG. 2 is a flow chart of a note erasing method provided by another embodiment of the invention, which is applied to an ink screen device, and as shown in FIG. 2, the method includes the following steps:
step S210, responding to the note taking operation in the current page, and drawing each stroke of the note according to the breakpoint data generated by the note taking operation.
The method comprises the steps that a user clicks a preset note function inlet in a current page to enter a note mode, after the note mode is entered, the operation generated in a screen by an electromagnetic pen can be recognized as note operation, an electromagnetic plate of an ink screen acquires report point data generated when a pen point of the electromagnetic pen contacts the screen in real time, a note layer is generated according to the report point data, the note layer and a page layer of the current page are synthesized, the synthesized page is sent to a display cache, and the synthesized page is synchronized to an ink screen device to be displayed. And continuously updating all report point data corresponding to the current page according to the incremental note taking operation, and drawing and displaying the note in real time according to all report point data corresponding to the current page.
In addition, the report point data generated by the note operation is stored in real time so as to be convenient for reproducing the note and performing other processing.
Step S220, in response to the erasing operation in the latest preset sampling time in the current page, determining an erasing track according to the report data generated by the erasing operation.
The erasing operation is used for erasing the note strokes written by the user in the current page, the user clicks a preset erasing function inlet in the current page to enter an erasing mode, the operation generated in the screen by using the electromagnetic pen after entering the erasing mode can be identified as the erasing operation, the electromagnetic plate acquires the report point data generated when the pen point of the electromagnetic pen contacts the screen in real time, and the erasing track is determined according to the acquired report point data.
In this embodiment, the erasing track is determined only according to the erasing operation within the latest preset sampling time, that is, only the latest section of the erasing track is intercepted as the basis for the subsequent erasing processing, which is different from the note track, the note track needs to be recorded in full, and the erasing track only needs to be concerned about the latest section of the track (the latest section of the erasing track can indicate the erasing intention of the user).
In step S230, at least one target stroke is obtained by filtering among the strokes of the current page, and a first preset surrounding area of the target stroke overlaps with a preset surrounding area of the erasing track.
The first preset surrounding area of the stroke is a minimum circumscribed rectangular area determined according to the report point coordinate information and the time information in the report point data of the stroke, namely the first preset surrounding area is the minimum circumscribed rectangular area including the report points. The preset surrounding area of the erasing track refers to the minimum circumscribed rectangular area of the erasing track.
After the erasing track is obtained, determining a preset surrounding area of the erasing track, and screening to obtain at least one target stroke of which the first preset surrounding area is intersected with or overlapped with the preset surrounding area of the erasing track according to the coordinate information of the first preset surrounding area of each stroke and the coordinate information of the preset surrounding area of the erasing track. And each item marking stroke enters the subsequent step for further processing, and other strokes do not carry out further processing.
Step S240, obtaining a center line of the preset width of the at least one target stroke according to the punctuation data of the at least one target stroke.
And aiming at any target stroke, connecting the coordinates of all report points contained in the report point data of the target stroke by using a connecting line with a preset width according to a time sequence to obtain the central line of the entry mark stroke.
And step S250, determining a region to be erased according to a second preset surrounding region of at least one target stroke intersected by the central line and the erasing track.
The second preset surrounding area of the stroke is determined according to a to-be-displayed graph obtained by rendering report point data of the stroke, specifically, the to-be-displayed graph is rendered according to report point coordinates, time information, pressure information, line width information and other information in the report point data, the to-be-displayed graph is a stroke which is finally displayed for a user and has a color format, a specified width format, a stroke front format and other formats, and the second preset surrounding area is determined according to the to-be-displayed graph obtained by rendering, that is, the thickness, the stroke front format and the like of the stroke need to be considered in the second preset surrounding area, and all pixel points used for displaying the stroke are included. Therefore, the area to be erased is determined according to the second preset surrounding area of each target stroke, the area to be erased can contain the area occupied by each presented target stroke, and then the target strokes can be completely removed.
Specifically, the second preset surrounding area of the strokes is a minimum circumscribed rectangle area of the rendered graph to be displayed, or an area obtained by amplifying the minimum circumscribed rectangle, and allowance is reserved so as to fully ensure that the target strokes are completely erased.
And if only one target stroke intersected with the erasing track exists, determining a second preset surrounding area of the entry marking stroke as an area to be erased.
If a plurality of (at least two) target paintbrushes with the center lines intersecting the erasing tracks are available, combining second preset surrounding areas of the target paintbrushes with the center lines intersecting the erasing tracks into one area to obtain an area to be erased.
Optionally, determining the area to be erased by using a boundary of a second preset enclosing area of the target stroke located at the edge in each item marking stroke (each item marking stroke with the central line intersecting with the erasing track) as the boundary of the area to be erased, wherein if the boundary of the second preset enclosing area of the target stroke located at the edge cannot form a closed area, connecting the disconnected part to make the area to be erased be the closed area, so that the area of the area to be erased can be smaller, and the subsequent calculation amount can be reduced.
Optionally, a minimum circumscribed rectangular region surrounded by a plurality of target brushes intersecting the center line and the erasing track is obtained to obtain a region to be erased.
Step S260, performing screenshot processing on a page area corresponding to the area to be erased in the current page, and covering the image obtained by screenshot on the area to be erased.
The method comprises the steps of capturing a picture of a page area corresponding to an area to be erased in a current page, wherein the coordinate position and the size of the page area are consistent with those of the area to be erased, because the current page and a note belong to different layers, the picture obtained through capturing the picture does not contain any note pen-stroke, and then the picture obtained through capturing the picture is covered on the upper layer of the area to be erased, and the pen-stroke to be erased is erased on the display effect through shielding the picture once captured.
In an optional mode, after covering a picture obtained by screenshot on an area to be erased, acquiring at least one first stroke overlapped with the area to be erased; obtaining partial strokes of at least one first stroke in an area to be erased, and adding the partial strokes into the picture; and the at least one first stroke comprises other strokes except for at least one target stroke of which the center line is intersected with the erasing track in all strokes of the current page.
The area to be erased may also include strokes whose central lines do not intersect with the erasing track, that is, the area to be erased may also include strokes which do not need to be erased, so that the screenshot is directly covered on the upper layer of the area to be erased, and the strokes whose central lines do not intersect with the erasing track are also shielded. Based on the above, the strokes overlapped with the area to be erased are screened out from other strokes except for the target strokes of which the center lines are intersected with the erasing track, so that at least one first stroke is obtained, for example, all other strokes are traversed, and whether the other strokes are the first strokes overlapped with the area to be erased or not is judged; then, obtaining the partial strokes of each first stroke falling into the area to be erased, supplementing the partial strokes of each first stroke into the picture covering the area to be erased, and if a complete first stroke is located in the area to be erased, the partial strokes corresponding to the first strokes are the partial strokes per se.
In an alternative way, the specific implementation of adding the local strokes to the picture is as follows: and adding the local strokes into the picture in a picture editing mode.
In another optional mode, the step of obtaining at least one first stroke overlapped with the region to be erased specifically includes: acquiring at least one second stroke in which a first preset surrounding area and an area to be erased are overlapped in other strokes; and screening out at least one first stroke which is overlapped with the area to be erased from at least one second stroke. Firstly, finding at least one second stroke with a first preset surrounding area overlapped with an area to be erased from other strokes except for a plurality of target strokes with center lines intersected with an erasing track, wherein the overlapping of the first preset surrounding area of the second stroke and the area to be erased shows that the second stroke is closer to the area to be erased, and the probability that each second stroke falls into the area to be erased is higher; and then, searching each first stroke which is really overlapped with the area to be erased from each second stroke. By the method, the strokes of the first preset surrounding area, which are not overlapped with the area to be erased, are filtered, the subsequent calculated amount is reduced, and the processing speed can be further improved.
According to the note erasing method provided by the embodiment, on one hand, an erasing track in the latest sampling time is intercepted, and strokes for erasing are determined according to the erasing track, so that the processing efficiency can be improved by the calculated amount, and meanwhile, the accuracy of erasing processing can be ensured; on the other hand, the target stroke overlapped by the first preset surrounding area and the preset surrounding area of the erasing track is searched, the central line of the preset width of the target stroke is drawn, whether the central line is intersected with the erasing track or not is judged, if the central line is intersected with the erasing track, the item marking stroke is erased, and by means of the method, factors such as the track thickness and the stroke front of the stroke can be ignored to reduce the calculated amount, the method is more suitable for the intention of a user, the erasing precision is higher, and therefore the accuracy of note erasing can be improved; on the other hand, the effect that the note is erased is achieved by adopting a regionalization processing mode, the region to be erased is determined according to all the strokes to be erased, the background page region of the region to be erased is intercepted and covered on the upper layer of the region to be erased, the speed of redrawing and displaying can be improved, the strokes which do not need to be erased in the region to be erased are added into the screenshot, and the accuracy of erasing processing is guaranteed.
FIG. 3 is a flow chart of a note erasing method provided by another embodiment of the invention, which is applied to an ink screen device, and as shown in FIG. 3, the method includes the following steps:
step S310, responding to the erasing operation in the current page, and determining an erasing track according to the report point data generated by the erasing operation.
Step S320, at least one target stroke is obtained by screening in all strokes of the current page, and a first preset surrounding area of the target stroke is overlapped with a preset surrounding area of the erasing track.
Step S330, obtaining a center line of the preset width of at least one target stroke according to the report point data of at least one target stroke.
Step S340, if the central line of any item marking stroke intersects with the erasing track, deleting the point data of the item marking stroke from the point data of each stroke of the current page, and redrawing each stroke according to the rest point data.
If the central line of a target stroke is intersected with the erasing track, the entry stroke marking is the stroke needing to be erased, specifically, the hit data of the entry stroke marking is deleted from the hit data of all strokes of the current page, the stroke is redrawn according to the hit data left after deletion, and the erasing accuracy can be ensured.
Specifically, determining at least one changed pixel point and change information thereof according to the remaining report point data and the report point data of each stroke of the current page; and refreshing at least one changed pixel point according to the change information. The mode is a non-screen-clearing local refreshing mode, the difference of pixel points before and after the report point data of the deleted strokes is compared, only the changed pixel points are changed, screen flicker can be avoided, and the speed of drawing again and sending to display can be improved.
According to the note erasing method provided by the embodiment, the target stroke with the first preset surrounding area overlapped with the preset surrounding area of the note erasing track is searched, the central line with the preset width of the target stroke is drawn, whether the central line is intersected with the erasing track or not is judged, if the central line is intersected with the erasing track, the target stroke is erased, and by means of the method, factors such as the track thickness and the stroke front of the stroke can be ignored to reduce the calculated amount, the method is more suitable for the intention of a user, the erasing precision is higher, and the accuracy of erasing the note can be improved; on the other hand, the display effect of erasing strokes is realized by adopting a local refreshing mode, screen flicker can be avoided, and the speed of drawing and displaying again can be improved.
An embodiment of the present invention provides a non-volatile computer storage medium, where the computer storage medium stores at least one executable instruction, and the computer executable instruction may execute the note erasing method in any method embodiment described above.
The executable instructions may be specifically configured to cause the processor to perform the following operations:
responding to the erasing operation in the current page, and determining an erasing track according to report point data generated by the erasing operation;
screening all strokes of a current page to obtain at least one target stroke, wherein a first preset surrounding area of the target stroke is overlapped with a preset surrounding area of an erasing track;
acquiring a central line of a preset width of at least one target stroke according to the report point data of at least one target stroke;
and if the central line of any item stroke mark intersects with the erasing track, erasing the item stroke mark.
In an optional manner, the first preset bounding region of the stroke is a minimum bounding rectangle region determined according to the newspaper point coordinate information and the time information in the newspaper point data of the stroke.
In an alternative, the executable instructions cause the processor to:
and connecting the coordinates of all report points contained in the report point data of any item marking stroke by using a connecting line with a preset width according to a time sequence to obtain the central line of the item marking stroke.
In an alternative, the executable instructions cause the processor to:
and responding to the note taking operation in the current page, and drawing each stroke according to the newspaper point data generated by the note taking operation.
In an alternative manner, the erase operation is specifically an erase operation within a last preset sampling time.
In an alternative, the executable instructions cause the processor to:
and deleting the hit data of the entry marking stroke from the hit data of each stroke of the current page, and redrawing each stroke according to the rest hit data.
In an alternative, the executable instructions cause the processor to:
determining at least one changed pixel point and change information thereof according to the remaining report point data and the report point data of each stroke of the current page;
and refreshing at least one changed pixel point according to the change information.
In an alternative, the executable instructions cause the processor to:
determining a region to be erased according to a second preset surrounding region of at least one target stroke intersected with the erasing track by the central line;
the second preset surrounding area of the stroke is determined according to a graph to be displayed, which is obtained by rendering the report point data of the stroke;
and performing screenshot processing on a page area corresponding to the area to be erased in the current page, and covering a picture obtained by screenshot on the area to be erased.
In an alternative, the executable instructions cause the processor to:
covering the picture obtained by screenshot on an area to be erased, and acquiring at least one first stroke overlapped with the area to be erased;
the at least one first stroke comprises other strokes except at least one target stroke of which the center line is intersected with the erasing track in all strokes of the current page;
and acquiring a partial stroke of at least one first stroke in the area to be erased, and adding the partial stroke into the picture.
In an alternative, the executable instructions cause the processor to:
acquiring at least one second stroke in which a first preset surrounding area and an area to be erased are overlapped in other strokes;
and screening out at least one first stroke which is overlapped with the area to be erased from at least one second stroke.
In an alternative, the executable instructions cause the processor to:
and merging the second preset surrounding areas of the target brushes with the center lines intersected with the erasing track into one area to obtain the area to be erased.
In an optional manner, the second preset enclosing region of the stroke is a minimum circumscribed rectangular region of the graph to be displayed or a region obtained by enlarging the minimum circumscribed rectangular region of the graph to be displayed.
In an optional manner, the preset enclosing area of the erasing track is a minimum circumscribed rectangular area of the erasing track.
Fig. 4 is a schematic structural diagram of an embodiment of the electronic device according to the present invention, and the specific embodiment of the present invention does not limit the specific implementation of the electronic device.
As shown in fig. 4, the electronic device may include: a processor (processor)402, a Communications Interface 404, a memory 406, and a Communications bus 408.
Wherein: the processor 402, communication interface 404, and memory 406 communicate with each other via a communication bus 408. A communication interface 404 for communicating with network elements of other devices, such as clients or other servers. The processor 402 is configured to execute the program 410, and may specifically perform relevant steps in the above-described note erasing method embodiment for an electronic device.
In particular, program 410 may include program code comprising computer operating instructions.
The processor 402 may be a central processing unit CPU or an application Specific Integrated circuit asic or one or more Integrated circuits configured to implement embodiments of the present invention. The electronic device comprises one or more processors, which can be the same type of processor, such as one or more CPUs; or may be different types of processors such as one or more CPUs and one or more ASICs.
And a memory 406 for storing a program 410. Memory 406 may comprise high-speed RAM memory, and may also include non-volatile memory (non-volatile memory), such as at least one disk memory.
The program 410 may specifically be configured to cause the processor 402 to perform the following operations:
responding to the erasing operation in the current page, and determining an erasing track according to report point data generated by the erasing operation;
screening all strokes of a current page to obtain at least one target stroke, wherein a first preset surrounding area of the target stroke is overlapped with a preset surrounding area of an erasing track;
acquiring a central line of a preset width of at least one target stroke according to the report data of at least one target stroke;
and if the central line of any item stroke mark intersects with the erasing track, erasing the item stroke mark.
In an optional manner, the first preset bounding region of the stroke is a minimum bounding rectangle region determined according to the newspaper point coordinate information and the time information in the newspaper point data of the stroke.
In an alternative, the program 410 causes the processor 402 to:
and connecting the coordinates of all report points contained in the report point data of any item marking stroke by using a connecting line with a preset width according to a time sequence to obtain the central line of the item marking stroke.
In an alternative, the program 410 causes the processor 402 to:
and responding to the note taking operation in the current page, and drawing each stroke according to the newspaper point data generated by the note taking operation.
In an alternative manner, the erase operation is embodied as an erase operation within a last predetermined sampling time.
In an alternative, the program 410 causes the processor 402 to:
and deleting the hit data of the entry marking stroke from the hit data of each stroke of the current page, and redrawing each stroke according to the rest hit data.
In an alternative, the program 410 causes the processor 402 to:
determining at least one changed pixel point and change information thereof according to the remaining report point data and the report point data of each stroke of the current page;
and refreshing at least one changed pixel point according to the change information.
In an alternative, the program 410 causes the processor 402 to:
determining a region to be erased according to a second preset surrounding region of at least one target stroke intersected with the erasing track by the central line;
the second preset surrounding area of the stroke is determined according to the graph to be displayed, which is obtained by rendering the report point data of the stroke;
and performing screenshot processing on a page area corresponding to the area to be erased in the current page, and covering a picture obtained by screenshot on the area to be erased.
In an alternative, the program 410 causes the processor 402 to:
covering the picture obtained by screenshot on an area to be erased, and acquiring at least one first stroke overlapped with the area to be erased;
the at least one first stroke comprises other strokes except at least one target stroke of which the center line is intersected with the erasing track in all strokes of the current page;
and acquiring a partial stroke of at least one first stroke in the area to be erased, and adding the partial stroke into the picture.
In an alternative, the program 410 causes the processor 402 to:
acquiring at least one second stroke in which a first preset surrounding area and an area to be erased are overlapped in other strokes;
and screening out at least one first stroke which is overlapped with the area to be erased from at least one second stroke.
In an alternative, the program 410 causes the processor 402 to:
and combining the second preset surrounding areas of the plurality of target brushes with the center lines intersected with the erasing track into one area to obtain the area to be erased.
In an optional manner, the second preset enclosing region of the stroke is a minimum circumscribed rectangular region of the graph to be displayed or a region obtained by enlarging the minimum circumscribed rectangular region of the graph to be displayed.
In an alternative mode, the predetermined enclosing area of the erasing track is a minimum bounding rectangle area of the erasing track.
The algorithms or displays presented herein are not inherently related to any particular computer, virtual system, or other apparatus. Various general purpose systems may also be used with the teachings herein. The required structure for constructing such a system will be apparent from the description above. In addition, embodiments of the present invention are not directed to any particular programming language. It is appreciated that a variety of programming languages may be used to implement the teachings of the present invention as described herein, and any descriptions of specific languages are provided above to disclose the best mode of the invention.
In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the embodiments of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the invention and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and furthermore they may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.
The various component embodiments of the invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art will appreciate that a microprocessor or Digital Signal Processor (DSP) may be used in practice to implement some or all of the functionality of some or all of the components according to embodiments of the present invention. The present invention may also be embodied as apparatus or device programs (e.g., computer programs and computer program products) for performing a portion or all of the methods described herein. Such programs implementing the present invention may be stored on computer-readable media or may be in the form of one or more signals. Such a signal may be downloaded from an internet website or provided on a carrier signal or in any other form.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names. The steps in the above embodiments should not be construed as limiting the order of execution unless specified otherwise.
The invention discloses: A1. a method of erasing notes, comprising:
responding to an erasing operation in a current page, and determining an erasing track according to report point data generated by the erasing operation;
screening at least one target stroke from all strokes of the current page, wherein a first preset surrounding area of the target stroke is overlapped with a preset surrounding area of the erasing track;
acquiring a center line of a preset width of the at least one target stroke according to the report point data of the at least one target stroke;
and if the central line of any item stroke mark intersects with the erasing track, erasing the item stroke mark.
A2. The method according to a1, wherein the first preset bounding region of the stroke is a minimum bounding rectangle region determined according to the hit coordinate information and the time information in the hit data of the stroke.
A3. The method according to a1, wherein the obtaining, according to the hit data of the at least one target stroke, the center line of the preset width of the at least one target stroke specifically includes:
and connecting the coordinates of all report points contained in the report point data of any item marking stroke by using a connecting line with a preset width according to a time sequence to obtain the central line of the item marking stroke.
A4. The method of a1, wherein before the method is performed, further comprising:
and responding to the note taking operation in the current page, and drawing each stroke according to the newspaper point data generated by the note taking operation.
A5. The method according to any of a1-a4, wherein the erase operation is in particular an erase operation within a last preset sample time.
A6. The method of any of a1-a5, wherein the scrubbing the entry stroke further comprises:
and deleting the hit data of the entry marking stroke from the hit data of each stroke of the current page, and redrawing each stroke according to the rest hit data.
A7. The method of a6, wherein the redrawing each stroke from the remaining hit data further comprises:
determining at least one changed pixel point and change information thereof according to the remaining report point data and the report point data of each stroke of the current page;
and refreshing the at least one changed pixel point according to the change information.
A8. The method of any one of a1-a5, wherein, if the centerline of any entry marker stroke intersects the erasure track, the erasure processing of that entry marker stroke further comprises:
determining a region to be erased according to a second preset surrounding region of at least one target stroke intersected with the erasing track by the central line;
the second preset surrounding area of the stroke is determined according to the graph to be displayed, which is obtained by rendering the report point data of the stroke;
and performing screenshot processing on a page area corresponding to the area to be erased in the current page, and covering a picture obtained by screenshot on the area to be erased.
A9. The method according to A8, wherein the second preset enclosing region of the stroke is the minimum bounding rectangle region of the graph to be displayed or the region obtained by enlarging the minimum bounding rectangle region of the graph to be displayed.
A10. The method according to A8 or a9, wherein after overlaying the screenshot picture over the area to be erased, the method further comprises:
acquiring at least one first stroke overlapped with the area to be erased;
wherein the at least one first stroke comprises other strokes except at least one target stroke of which the center line is intersected with the erasing track in all strokes of the current page;
and acquiring a partial stroke of the at least one first stroke in the area to be erased, and adding the partial stroke into the picture.
A11. The method of a10, wherein the acquiring at least one first stroke overlapping the region to be erased further comprises:
acquiring at least one second stroke in which a first preset surrounding area in the other strokes is overlapped with the area to be erased;
and screening out at least one first stroke which is overlapped with the area to be erased from the at least one second stroke.
A12. The method according to A8, wherein the determining an area to be erased according to the second preset enclosing area of the at least one target stroke in which the center line intersects with the erasing track further comprises:
and merging the second preset surrounding areas of the plurality of target brushes with the center lines intersected with the erasing track into one area to obtain the area to be erased.
A13. The method of any one of A1-A12, wherein the preset bounding area of the erase track is a minimum circumscribed rectangular area of the erase track.
B14. An electronic device, comprising: the system comprises a processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface complete mutual communication through the communication bus;
the memory is configured to store at least one executable instruction that causes the processor to:
responding to an erasing operation in a current page, and determining an erasing track according to report point data generated by the erasing operation;
screening at least one target stroke from all strokes of the current page, wherein a first preset surrounding area of the target stroke is overlapped with a preset surrounding area of the erasing track;
acquiring a center line of a preset width of the at least one target stroke according to the report point data of the at least one target stroke;
and if the central line of any item stroke mark intersects with the erasing track, erasing the item stroke mark.
B15. The electronic device according to B14, wherein the first preset bounding region of the stroke is a minimum bounding rectangle region determined according to the hit coordinate information and the time information in the hit data of the stroke.
B16. The electronic device of B14, wherein the executable instructions cause the processor to:
and connecting the coordinates of all report points contained in the report point data of any item marking stroke by using a connecting line with a preset width according to a time sequence to obtain the central line of the item marking stroke.
B17. The electronic device of B14, wherein the executable instructions cause the processor to:
and responding to the note taking operation in the current page, and drawing each stroke according to the newspaper point data generated by the note taking operation.
B18. The electronic device of any of B14-B17, wherein the erase operation is specifically an erase operation within a last preset sample time.
B19. The electronic device of any one of B14-B18, wherein the executable instructions cause the processor to:
deleting the report point data of the entry marking stroke from the report point data of each stroke of the current page, and redrawing each stroke according to the rest report point data.
B20. The electronic device of B19, wherein the executable instructions cause the processor to:
determining at least one changed pixel point and change information thereof according to the remaining report point data and the report point data of each stroke of the current page;
and refreshing the at least one changed pixel point according to the change information.
B21. The electronic device of any one of B14-B18, wherein the executable instructions cause the processor to:
determining a region to be erased according to a second preset surrounding region of at least one target stroke intersected with the erasing track by the central line;
the second preset surrounding area of the stroke is determined according to a graph to be displayed, which is obtained by rendering the report point data of the stroke;
and performing screenshot processing on a page area corresponding to the area to be erased in the current page, and covering a picture obtained by screenshot on the area to be erased.
B22. The method according to B21, wherein the second preset enclosing region of the stroke is a minimum circumscribed rectangular region of the to-be-displayed graph obtained by rendering the punctuation data of the stroke or a region obtained by enlarging the minimum circumscribed rectangular region.
B23. The electronic device of B21 or B22, wherein the executable instructions cause the processor to:
after covering the picture obtained by screenshot on the area to be erased, acquiring at least one first stroke overlapped with the area to be erased;
wherein the at least one first stroke comprises other strokes except at least one target stroke of which the center line is intersected with the erasing track in all strokes of the current page;
and acquiring a partial stroke of the at least one first stroke in the area to be erased, and adding the partial stroke into the picture.
B24. The electronic device of B23, wherein the executable instructions cause the processor to:
acquiring at least one second stroke in which a first preset surrounding area in the other strokes is overlapped with the area to be erased;
and screening out at least one first stroke which is overlapped with the area to be erased from the at least one second stroke.
B25. The electronic device of B21, wherein the executable instructions cause the processor to:
and merging the second preset surrounding areas of the plurality of target brushes with the center lines intersected with the erasing track into one area to obtain the area to be erased.
B26. The electronic device of any one of B13-B25, wherein the preset bounding area of the erase track is a minimum bounding rectangular area of the erase track.
C27. A computer storage medium having stored therein at least one executable instruction that causes a processor to perform operations corresponding to the note erasure method of any of a1-a 13.
Claims (10)
1. A method of erasing notes, comprising:
responding to an erasing operation in a current page, and determining an erasing track according to report point data generated by the erasing operation;
screening at least one target stroke from all strokes of the current page, wherein a first preset surrounding area of the target stroke is overlapped with a preset surrounding area of the erasing track;
acquiring a center line of a preset width of the at least one target stroke according to the report point data of the at least one target stroke;
and if the central line of any entry stroke mark intersects with the erasing track, erasing the entry stroke mark.
2. The method of claim 1, wherein the first predetermined bounding region of the stroke is a minimum bounding rectangular region determined based on the hit coordinate information and the time information in the hit data of the stroke.
3. The method according to claim 1, wherein the obtaining, according to the hit data of the at least one target stroke, a center line of a preset width of the at least one target stroke specifically comprises:
and connecting the coordinates of all report points contained in the report point data of any item marking stroke by using a connecting line with a preset width according to a time sequence to obtain the central line of the item marking stroke.
4. The method of claim 1, wherein prior to performing the method, further comprising:
and responding to the note taking operation in the current page, and drawing each stroke according to the newspaper point data generated by the note taking operation.
5. Method according to any of claims 1-4, wherein the erase operation is in particular an erase operation within a last preset sample time.
6. The method of any of claims 1-5, wherein said erasing the entry stroke further comprises:
and deleting the hit data of the entry marking stroke from the hit data of each stroke of the current page, and redrawing each stroke according to the rest hit data.
7. The method of claim 6, wherein said redrawing each stroke according to remaining hit data further comprises:
determining at least one changed pixel point and change information thereof according to the remaining report point data and the report point data of each stroke of the current page;
and refreshing the at least one changed pixel point according to the change information.
8. The method of any of claims 1-5, wherein, if the centerline of any entry marker stroke intersects the erasure track, the erasing the entry marker stroke further comprises:
determining an area to be erased according to a second preset surrounding area of at least one target stroke intersected with the erasing track by the central line;
the second preset surrounding area of the stroke is determined according to the graph to be displayed, which is obtained by rendering the report point data of the stroke;
and performing screenshot processing on a page area corresponding to the area to be erased in the current page, and covering a picture obtained by screenshot on the area to be erased.
9. An electronic device, comprising: the system comprises a processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface complete mutual communication through the communication bus;
the memory is configured to store at least one executable instruction that causes the processor to:
responding to an erasing operation in a current page, and determining an erasing track according to report point data generated by the erasing operation;
screening at least one target stroke from all strokes of the current page, wherein a first preset surrounding area of the target stroke is overlapped with a preset surrounding area of the erasing track;
acquiring a center line of a preset width of the at least one target stroke according to the report data of the at least one target stroke;
and if the central line of any entry stroke mark intersects with the erasing track, erasing the entry stroke mark.
10. A computer storage medium having stored therein at least one executable instruction that causes a processor to perform operations corresponding to the note erasure method of any of claims 1-8.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116774877A (en) * | 2023-08-21 | 2023-09-19 | 福昕鲲鹏(北京)信息科技有限公司 | Method and device for erasing graffiti handwriting in OFD document page |
| CN117111817A (en) * | 2023-10-24 | 2023-11-24 | 福昕鲲鹏(北京)信息科技有限公司 | Annotation information erasing method and device, electronic equipment and storage medium |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116774877A (en) * | 2023-08-21 | 2023-09-19 | 福昕鲲鹏(北京)信息科技有限公司 | Method and device for erasing graffiti handwriting in OFD document page |
| CN116774877B (en) * | 2023-08-21 | 2023-12-19 | 福昕鲲鹏(北京)信息科技有限公司 | Method and device for erasing graffiti handwriting in OFD document page |
| CN117111817A (en) * | 2023-10-24 | 2023-11-24 | 福昕鲲鹏(北京)信息科技有限公司 | Annotation information erasing method and device, electronic equipment and storage medium |
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