CN113781603B - Track point generating method, device, computer equipment and computer storage medium - Google Patents
Track point generating method, device, computer equipment and computer storage medium Download PDFInfo
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Abstract
The present disclosure provides a track point generating method, a device computer apparatus and a computer storage medium, wherein the method includes: acquiring a curve to be drawn; intercepting each section of intercepting curve according to a preset intercepting range of pixel points; determining each inflection point corresponding to the curve by comparing the change of azimuth angle difference values corresponding to the intercepting curves of different sections; and generating and displaying track points corresponding to the curve according to the determined inflection points. According to the embodiment of the disclosure, the inflection point in the curve is preferentially determined, so that the problem that the accurate curve cannot be represented by the track point due to missing of the inflection point caused by incorrect setting of the sampling interval in the process of sampling the curve according to the preset sampling interval is avoided, and the accuracy of representing the curve by the track point is improved; in addition, the accuracy of inflection point identification is improved.
Description
Technical Field
The disclosure relates to the technical field of computers, and in particular relates to a track point generating method, a track point generating device, computer equipment and a computer storage medium.
Background
Along with the innovation and development of education systems, the development of student's German intellectual work and the comprehensive development of the student's German intellectual work have become the main tasks of current education; when training student's fine arts ability, to some students that do not have fine arts basis, can carry out fine arts study through the mode of copying. The copying points in each line segment in the copying pictures for students are generally manually drawn by picture making staff, so that when the copying pictures are complex, a great deal of time and cost are required to be consumed to finish drawing the copying points, and the efficiency is low.
In order to improve the efficiency of drawing the copy points in the copy picture, the copy points in the copy picture can be determined by using an automatic sampling mode, but when the copy points are determined by using the automatic sampling mode, some important points in the copy picture (such as inflection points of curves in the copy picture) can not be sampled due to improper selection of sampling intervals, so that the problem of inaccuracy of the copy picture represented by the copy points can be caused.
Disclosure of Invention
The embodiment of the disclosure at least provides a track point generating method, a track point generating device, computer equipment and a computer storage medium.
In a first aspect, an embodiment of the present disclosure provides a track point generating method, including:
acquiring a curve to be drawn;
intercepting each section of intercepting curve according to a preset intercepting range of pixel points; wherein, the pixel points between the intercepting curves of the intercepted adjacent sections are overlapped;
determining each inflection point corresponding to the curve by comparing the change of azimuth angle difference values corresponding to the different sections of intercepting curves; the azimuth angle difference value is the difference of azimuth angles of different line segments in the intercepting curve;
generating and displaying track points corresponding to the curve according to the determined inflection points; the track points are used for indicating a user to draw a curve.
In one possible implementation manner, according to a preset pixel point interception range, intercepting each segment of interception curve respectively includes:
and according to a preset pixel point interception range, sequentially taking each pixel point on the curve as an interception starting point, and intercepting each section of interception curve respectively.
In one possible implementation manner, the determining each inflection point corresponding to the curve by comparing the change of the azimuth difference value corresponding to the curve of different segment interception includes:
determining a first intercepting curve when the corresponding azimuth difference value is increased from being smaller than a set threshold value to being larger than or equal to the set threshold value and a second intercepting curve when the corresponding azimuth difference value intercepted after intercepting the first intercepting curve is reduced from being larger than the set threshold value to being smaller than or equal to the set threshold value by comparing azimuth difference values corresponding to the intercepting curves of different sections;
And determining an inflection point corresponding to the curve based on the first intercepting curve and the second intercepting curve.
In one possible embodiment, the azimuth difference is determined according to the following steps:
and determining an azimuth angle difference value corresponding to each section of intercepting curve based on azimuth angles corresponding to the front half line segment and the rear half line segment corresponding to the section of intercepting curve.
In one possible implementation, determining the first and second clipping curves includes:
if the azimuth angle difference value corresponding to the current section of intercepting curve is larger than or equal to a set threshold value and the azimuth angle difference value corresponding to the previous section of intercepting curve of the current section of intercepting curve is smaller than the set threshold value, taking the current section of intercepting curve as the first intercepting curve;
and if the azimuth angle difference value corresponding to the current section of intercepting curve is smaller than or equal to a set threshold value and the azimuth angle difference value corresponding to the intercepting curve of the previous section of intercepting curve of the current section is larger than the set threshold value, taking the intercepting curve of the current section as the second intercepting curve.
In one possible implementation manner, the determining, based on the first truncated curve and the second truncated curve, an inflection point corresponding to the curve includes:
Acquiring a first midpoint of the first intercepting curve and a second midpoint of the second intercepting curve;
and calculating a midpoint between the first midpoint and the second midpoint, and taking the midpoint as one inflection point.
In one possible implementation manner, the generating and displaying the track point corresponding to the curve according to the determined inflection points includes:
dividing the curve into a plurality of sampling line segments based on the determined inflection points; the inflection point is an end point of the sampling line segment;
sampling from each sampling line segment based on a preset sampling interval to obtain a plurality of track points; the plurality of track points comprise inflection points in a curve;
and taking a plurality of track points respectively sampled in the plurality of sampling line segments as track points corresponding to the curve.
In a second aspect, an embodiment of the present disclosure further provides a track point generating device, including:
the acquisition module is used for acquiring a curve to be drawn;
the first processing module is used for intercepting each section of intercepting curve according to a preset intercepting range of pixel points; wherein, the pixel points between the intercepting curves of the intercepted adjacent sections are overlapped;
the determining module is used for determining each inflection point corresponding to the curve by comparing the change of azimuth angle difference values corresponding to the different section intercepting curves; the azimuth angle difference value is the difference of azimuth angles of different line segments in the intercepting curve;
The second processing module is used for generating and displaying track points corresponding to the curve according to the determined inflection points; the track points are used for indicating a user to draw a curve.
In one possible implementation manner, the first processing module is specifically configured to, when executing the intercepting process according to the preset pixel intercepting range, intercept each segment of intercepting curve respectively:
and according to a preset pixel point interception range, sequentially taking each pixel point on the curve as an interception starting point, and intercepting each section of interception curve respectively.
In one possible implementation manner, the determining module is specifically configured to, when performing the determining of each inflection point corresponding to the curve by comparing the changes of the azimuth difference values corresponding to the different segment-truncated curves:
determining a first intercepting curve when the corresponding azimuth difference value is increased from being smaller than a set threshold value to being larger than or equal to the set threshold value and a second intercepting curve when the corresponding azimuth difference value intercepted after intercepting the first intercepting curve is reduced from being larger than the set threshold value to being smaller than or equal to the set threshold value by comparing azimuth difference values corresponding to the intercepting curves of different sections;
and determining an inflection point corresponding to the curve based on the first intercepting curve and the second intercepting curve.
In one possible implementation, the determining module determines the azimuth difference value according to the following steps:
and determining an azimuth angle difference value corresponding to each section of intercepting curve based on azimuth angles corresponding to the front half line segment and the rear half line segment corresponding to the section of intercepting curve.
In one possible implementation manner, when the determining module determines the first clipping curve and the second clipping curve, the determining module is specifically configured to:
if the azimuth angle difference value corresponding to the current section of intercepting curve is larger than or equal to a set threshold value and the azimuth angle difference value corresponding to the previous section of intercepting curve of the current section of intercepting curve is smaller than the set threshold value, taking the current section of intercepting curve as the first intercepting curve;
and if the azimuth angle difference value corresponding to the current section of intercepting curve is smaller than or equal to a set threshold value and the azimuth angle difference value corresponding to the intercepting curve of the previous section of intercepting curve of the current section is larger than the set threshold value, taking the intercepting curve of the current section as the second intercepting curve.
In one possible implementation manner, the determining module is specifically configured to, when executing the determining the inflection point corresponding to the curve based on the first clipping curve and the second clipping curve:
Acquiring a first midpoint of the first intercepting curve and a second midpoint of the second intercepting curve;
and calculating a midpoint between the first midpoint and the second midpoint, and taking the midpoint as one inflection point.
In one possible implementation manner, when the second processing module generates and displays the track point corresponding to the curve according to the determined inflection points, the second processing module is specifically configured to:
dividing the curve into a plurality of sampling line segments based on the determined inflection points; the inflection point is an end point of the sampling line segment;
sampling from each sampling line segment based on a preset sampling interval to obtain a plurality of track points; the plurality of track points comprise inflection points in a curve;
and taking a plurality of track points respectively sampled in the plurality of sampling line segments as track points corresponding to the curve.
In a third aspect, an optional implementation of the disclosure further provides a computer device, including: a processor, a memory storing machine-readable instructions executable by the processor for executing machine-readable instructions stored in the memory, which when executed by the processor perform the steps of the trace point generation method as described in the first aspect, or any possible implementation of the first aspect.
In a fourth aspect, an optional implementation manner of the disclosure further provides a computer readable storage medium, where a computer program is stored, and the computer program is executed by a processor to perform the steps of the track point generating method according to the first aspect or any possible implementation manner of the first aspect.
In the track point generation method provided by the embodiment of the disclosure, each section of intercepting curve is intercepted according to a preset pixel point intercepting range, and each inflection point corresponding to the curve is determined by comparing the change of azimuth angle difference values corresponding to different sections of intercepting curves; after each inflection point corresponding to the curve is determined, generating and displaying a track point corresponding to the curve according to each determined inflection point, so that a user is instructed to draw the curve through the track point; here, through the inflection point in the predetermined curve, the problem that the accurate curve cannot be represented by the track point due to missing the inflection point caused by improper setting of the sampling interval in the process of sampling the curve according to the preset sampling interval is avoided, and therefore the accuracy of representing the curve by the track point is improved.
In addition, in the embodiment of the disclosure, each pixel point on the curve can be sequentially used as a interception starting point, a plurality of sections of interception curves corresponding to the curve to be drawn (the pixel points between the interception curves are coincident), and turning changes between the interception curves are determined by comparing the changes of azimuth angle difference values corresponding to the interception curves, so that each inflection point corresponding to the curve is determined, and the accuracy of inflection point identification is improved.
The description of the effects of the track point generating device, the computer device, and the computer-readable storage medium is referred to the description of the track point generating method, and is not repeated here.
The foregoing objects, features and advantages of the disclosure will be more readily apparent from the following detailed description of the preferred embodiments taken in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for the embodiments are briefly described below, which are incorporated in and constitute a part of the specification, these drawings showing embodiments consistent with the present disclosure and together with the description serve to illustrate the technical solutions of the present disclosure. It is to be understood that the following drawings illustrate only certain embodiments of the present disclosure and are therefore not to be considered limiting of its scope, for the person of ordinary skill in the art may admit to other equally relevant drawings without inventive effort.
FIG. 1 illustrates a flow chart of a method of generating trace points provided by an embodiment of the present disclosure;
fig. 2 is a schematic diagram of a curve to be drawn including a multi-segment truncated curve in the track point generating method according to the embodiment of the present disclosure;
FIG. 3 is a schematic diagram showing a truncated curve indicating an azimuth difference in the track point generating method according to the embodiment of the present disclosure;
fig. 4 is a schematic diagram showing a curve to be drawn, which indicates a first intercepting curve and a second intercepting curve, in the track point generating method according to the embodiment of the present disclosure;
fig. 5 is a schematic diagram of a curve to be drawn, which indicates an inflection point, in the trajectory point generation method according to the embodiment of the present disclosure;
fig. 6 is a schematic diagram of another curve to be drawn, which indicates an inflection point, in the trajectory point generation method provided by the embodiment of the present disclosure;
fig. 7 is a schematic diagram illustrating a curve to be drawn by using a plurality of track points in the track point generating method according to the embodiment of the present disclosure;
FIG. 8 is a schematic diagram of a track point generating device according to an embodiment of the present disclosure;
fig. 9 shows a schematic diagram of a computer device provided by an embodiment of the present disclosure.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are only some embodiments of the present disclosure, but not all embodiments. The components of the disclosed embodiments generally described and illustrated herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present disclosure is not intended to limit the scope of the disclosure, as claimed, but is merely representative of selected embodiments of the disclosure. All other embodiments, which can be made by those skilled in the art based on the embodiments of this disclosure without making any inventive effort, are intended to be within the scope of this disclosure.
The present invention is directed to a method for manufacturing a semiconductor device, and a semiconductor device manufactured by the method.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
For the sake of understanding the present embodiment, first, a detailed description will be given of a track point generating method disclosed in an embodiment of the present disclosure, where an execution body of the track point generating method provided in the embodiment of the present disclosure is generally a computer device having a certain computing capability, where the computer device includes, for example: the terminal device, or server or other processing device, may be a User Equipment (UE), mobile device, user terminal, cellular phone, cordless phone, personal digital assistant (Personal Digital Assistant, PDA), handheld device, computing device, vehicle mounted device, wearable device, etc. In some possible implementations, the trace point generation method may be implemented by way of a processor invoking computer readable instructions stored in a memory.
Referring to fig. 1, a flowchart of a track point generating method according to an embodiment of the present disclosure is shown, where the track point generating method includes S101 to S104, where:
s101, acquiring a curve to be drawn.
It should be noted that, the track point generating method provided by the embodiment of the present disclosure may be applied to any scenario in which a track line needs to be processed to generate a track point for indicating the track line; for example, the method can be applied to a copying scene, any curve in a copying picture needing to be copied is processed, track points for indicating the curve are generated, and the track points are displayed for students to copy, namely curve drawing; the method can also be applied to urban construction scenes, processes the route to be planned, and generates track points for indicating the route to be planned so as to plan the information such as the speed, the acceleration and the like of the vehicle based on the track points for indicating the route to be planned; the method can be applied to a scene of researching a running track of a vehicle or a robot, wherein the running track of the vehicle or the robot can be processed to generate track points for indicating the running track, so that the performance of the vehicle or the robot can be further researched and improved based on speed information, acceleration information, pose information and the like corresponding to the track points.
Based on this, the curves to be plotted may include, for example, but are not limited to: at least one of any curve contained in a copying picture in a copying scene, a route to be planned in an urban planning scene, and a running route of a vehicle or a robot and the like; in the embodiment of the disclosure, a detailed description will be given by taking an example that the track point generating method is applied to a copy scene, and a curve to be drawn includes any curve included in a copy picture in the copy scene.
In view of S101 above, the track point generating method provided by the embodiment of the present disclosure further includes:
s102, intercepting each section of intercepting curve according to a preset intercepting range of pixel points; wherein, the pixel points between the intercepted adjacent section curves are coincided.
In the embodiment of the disclosure, in order to solve the problem in the prior art that the inflection point is conventionally identified, the method comprises the following steps: the method of comparing the azimuth difference between two adjacent fold lines in the curve with the preset angle limiting value, and determining the problem of inaccurate inflection points in the curve, may intercept the curve to be drawn into a plurality of sections of intercepting curves (the pixel points between the intercepting curves are coincident), and then determine each inflection point corresponding to the curve by comparing the change of the azimuth difference corresponding to each intercepting curve based on S103 described below.
Here, the preset pixel point intercepting range may include 2m+1, for example, and in general, m is set to be a positive integer between 1 and 10 in order to improve accuracy of inflection point identification; generally, the smaller m is, the higher the accuracy of inflection point identification is; the specific preset pixel point interception range can be set according to actual needs, and is not particularly limited here.
In addition, the accuracy of inflection point identification is also related to the pixel point overlap ratio between the intercepted adjacent section curves, and generally the higher the pixel point overlap ratio between the intercepted adjacent section curves is, the higher the accuracy of inflection point identification is. For example, each pixel point is used as a starting point for intercepting the curve, and only one pixel point between adjacent sections of curves is different.
In specific implementation, each pixel point on the curve can be sequentially taken as a interception starting point according to a preset pixel point interception range, and each section of interception curve is intercepted respectively; here, there is only one different pixel point between the intercepting curves of adjacent segments in the intercepting curves of each intercepting segment, and the accuracy of inflection point identification is the highest at this time.
For example, if m=3, the preset pixel point interception range includes 7 pixel points; firstly, taking a starting pixel point a of a curve to be drawn as a interception starting point, taking 7 pixel points as interception lengths, and determining an interception curve a corresponding to the curve to be drawn; then taking the next pixel point b adjacent to the initial pixel point a of the curve to be drawn in the curve to be drawn as a interception starting point, taking 7 pixel points as interception lengths, and determining an interception curve b corresponding to the curve to be drawn; then taking the next pixel point c adjacent to the pixel point b in the curve to be drawn as a interception starting point, taking 7 pixel points as interception lengths, and determining an interception curve c corresponding to the curve to be drawn; based on the mode, sequentially moving a pixel point on the curve to be drawn, taking 7 pixel points as intercepting lengths, and intercepting the curve until the end pixel point of the curve to be drawn is intercepted, so that each intercepting curve corresponding to the curve to be drawn is obtained; for example, if the curve to be drawn includes 21 pixels, a schematic diagram of intercepting the curve to be drawn with 7 pixels as intercepting lengths may be shown in fig. 2, where the schematic diagram shows 21 pixels included in the curve to be drawn (i.e., a starting pixel a, a next pixel b adjacent to the starting pixel a, a next pixel c adjacent to the pixel b,..; the intercepting curve a consists of a pixel point a, a pixel point b, a pixel point c, a pixel point d, a pixel point e, a pixel point f and a pixel point g; the intercepting curve b is composed of a pixel point b, a pixel point c, a pixel point d, a pixel point e, a pixel point f, a pixel point g and a pixel point h; the intercepting curve o consists of a pixel point o, a pixel point p, a pixel point q, a pixel point r, a pixel point s, a pixel point t and a pixel point u.
In view of S102 above, the track point generating method provided by the embodiment of the present disclosure further includes:
s103, determining each inflection point corresponding to the curve by comparing the change of azimuth angle difference values corresponding to the intercepting curves of different sections; the azimuth difference comprises the difference in azimuth of different line segments in the truncated curve.
The inflection point may include, for example, but not limited to, a point of two segments with different bending directions in the connecting curve, and a turning point of two segments with turning relation in the connecting curve; the azimuth angle includes: from the north-pointing direction line of a certain point, a horizontal included angle between the clockwise direction and the target direction is formed; here, the azimuth difference includes the difference between the azimuth angles of the front and rear two different segments in the truncated curve, and may include, but is not limited to: the azimuth angle difference between the front and rear half sections in the intercepting curve (i.e. the front and rear half sections formed by taking the midpoint of the intercepting curve as a boundary) and the azimuth angle difference between the front and rear two different sections in the intercepting curve (here, the front and rear two different sections in the intercepting curve can be the front and rear half sections formed by taking the non-midpoint of the intercepting curve as a boundary). For example, a target point (may be a midpoint) is selected in the intercepting curve, and an angle between a direction from the intercepting start point to the target point and a direction from the target point to the intercepting end point is calculated as the azimuth angle.
Illustratively, the azimuth difference value corresponding to each segment of the truncated curve may be determined by: and determining an azimuth angle difference value corresponding to each section of intercepting curve based on azimuth angles corresponding to the front half line segment and the rear half line segment corresponding to the section of intercepting curve.
Specifically, for each section of intercepting curve, taking the midpoint of the intercepting curve of the section as a boundary, dividing the intercepting curve of the section into a front half section and a rear half section, and calculating the azimuth angle alpha of a line segment (namely a front half section line segment) between the intercepting start point and the midpoint of the intercepting curve by taking the intercepting start point in the intercepting curve as the start point; meanwhile, taking the midpoint in the intercepted curve as a starting point, calculating the azimuth angle beta of a line segment (namely a second half segment) between the midpoint in the intercepted curve and the intercepting end point in the intercepted curve; the absolute value of the difference between the azimuth angles beta and alpha is subtracted as the azimuth angle difference corresponding to the section of intercepting curve.
For example, if the intercepting curve is the intercepting curve a in fig. 2, the intercepting start point of the intercepting curve a is the pixel point a, the middle point of the intercepting curve a is the pixel point d, and the intercepting end point of the intercepting curve a is the pixel point g, the first half segment corresponding to the intercepting curve a is the segment 1 between the pixel point a and the pixel point d, and the second half segment corresponding to the intercepting curve a is the segment 2 between the pixel point d and the pixel point g; thus, the azimuth angle alpha is a horizontal included angle between the clockwise direction and the line segment 1 from the north-pointing direction line of the pixel point a; the azimuth angle beta is a horizontal included angle between the clockwise direction and the line segment 2 from the north-pointing direction line of the pixel point d; a schematic diagram including the azimuth angle α and the azimuth angle β may be shown in fig. 3, where the intercepting curve a, the line segment 1, the line segment 2, and the azimuth angle α and the azimuth angle β are shown in fig. 3; the absolute value of the difference between the azimuth angles β minus the azimuth angle α in fig. 3 is taken as the azimuth angle difference γ corresponding to the section of the truncated curve, i.e., γ= |β - α|.
In a specific implementation, after determining the azimuth difference value corresponding to each section of intercepting curve, the inflection point in the curve to be drawn may be determined by the change rule corresponding to the azimuth difference value corresponding to each section of intercepting curve (i.e. when the intercepting curve gradually approaches the inflection point in the curve, the azimuth difference value corresponding to the intercepting curve gradually increases; when the intercepting curve gradually moves away from the inflection point in the curve, the azimuth difference value corresponding to the intercepting curve gradually decreases), which is specifically described as follows: determining a first intercepting curve when the corresponding azimuth difference value is increased from being smaller than a set threshold value to being larger than or equal to the set threshold value and a second intercepting curve when the corresponding azimuth difference value intercepted after the first intercepting curve is intercepted is reduced from being larger than the set threshold value to being smaller than or equal to the set threshold value by comparing azimuth difference values corresponding to the intercepting curves of different sections; and determining an inflection point corresponding to the curve based on the first intercepting curve and the second intercepting curve.
The set threshold may be a critical angle value of the azimuth angle difference value set according to actual needs, which is not particularly limited herein; in the implementation, the accuracy of inflection point identification can be improved by adjusting the value of the set threshold value; when the value of the general set threshold is smaller, the accuracy of inflection point identification is lower; when the value of the set threshold is relatively large, the accuracy of inflection point identification is relatively high; for example, when the threshold is set to 5 degrees, all the intercepting curves when the azimuth angle difference is increased from less than 5 degrees to more than or equal to 5 degrees are taken as the first intercepting curves, and the first intercepting curves comprise curves with the bending degree increased by more than or equal to 5 degrees and without inflection points; all the intercepting curves when the azimuth angle difference value is reduced from more than 5 degrees to less than or equal to 5 degrees are taken as second intercepting curves, and the second intercepting curves comprise curves with the bending degree reduced by more than or equal to 5 degrees and do not comprise inflection points; therefore, when the inflection point is identified based on the first intercepting curve and the second intercepting curve, points which are not inflection points are also identified, so that the accuracy of the inflection point identification is lower; therefore, it is necessary to set a relatively appropriate setting threshold according to at least one of the actual requirement and the bending degree of the curve, so as to more accurately identify the inflection point in the curve and improve the accuracy of inflection point identification.
In a specific implementation, after determining the azimuth difference value corresponding to each section of the intercepting curve, the first intercepting curve and the second intercepting curve may be determined according to the azimuth difference value corresponding to each section of the intercepting curve and a set threshold, which is specifically described as follows: if the azimuth angle difference value corresponding to the current section of intercepting curve is larger than or equal to a set threshold value and the azimuth angle difference value corresponding to the previous section of intercepting curve of the current section of intercepting curve is smaller than the set threshold value, taking the current section of intercepting curve as a first intercepting curve; and if the azimuth angle difference value corresponding to the current section of intercepting curve is smaller than or equal to a set threshold value and the azimuth angle difference value corresponding to the previous section of intercepting curve of the current section of intercepting curve is larger than the set threshold value, taking the current section of intercepting curve as a second intercepting curve.
The method includes the steps that each section of intercepting curve is used as a current section of intercepting curve, an azimuth angle difference value corresponding to the current section of intercepting curve is compared with a set threshold, and the current section of intercepting curve is used as a first intercepting curve under the condition that the azimuth angle difference value corresponding to the current section of intercepting curve is larger than or equal to the set threshold and the azimuth angle difference value corresponding to the previous section of intercepting curve of the current section of intercepting curve is smaller than the set threshold; under the condition that the azimuth angle difference value corresponding to the current section of intercepting curve is smaller than or equal to a set threshold value and the azimuth angle difference value corresponding to the previous section of intercepting curve of the current section of intercepting curve is larger than the set threshold value, the current section of intercepting curve is used as a second intercepting curve; if the display interface of each section of the intercepting curve is shown in fig. 2, the specific first intercepting curve is an intercepting curve d (i.e., an intercepting curve formed by a pixel point d, a pixel point e, a pixel point f, a pixel point g, a pixel point h, a pixel point i and a pixel point j), and the second intercepting curve is an intercepting curve h (an intercepting curve formed by a pixel point h, a pixel point i, a pixel point j, a pixel point k, a pixel point l, a pixel point m and a pixel point n), and the specific schematic diagrams indicating the first intercepting curve and the second intercepting curve are shown in fig. 4.
After the first clipping curve and the second clipping curve are determined, an inflection point corresponding to the curve may be determined based on the determined first clipping curve and second clipping curve, which is described in detail as follows: acquiring a first midpoint of a first intercepting curve and a second midpoint of a second intercepting curve; a midpoint between the first midpoint and the second midpoint is calculated and the midpoint is taken as an inflection point.
Illustratively, if the determined first intercept curve and second intercept curve are as shown in fig. 4, then a first midpoint of the first intercept curve (i.e., the midpoint of intercept curve d) is determined: a pixel point g of the curve; determining a second midpoint of the second truncated curve (i.e., the midpoint of truncated curve h): a pixel point k of the curve; midpoint in a line segment formed by the first midpoint (i.e., pixel point g of the curve) and the second midpoint (i.e., pixel point k of the curve): a schematic diagram of the curve point i, which is the inflection point of the curve, is shown in fig. 5.
In view of S103 above, the track point generating method provided by the embodiment of the present disclosure further includes:
s104, generating and displaying track points corresponding to the curve according to the determined inflection points; the track points are used for indicating a user to draw a curve.
In a specific implementation, in order to avoid the problem that when a curve is sampled in a copying scene, inflection points in the curve cannot be identified due to improper sampling intervals, so that a picture to be copied cannot be accurately represented through sampling points, the inflection points corresponding to the curve can be determined first based on specific implementations shown in embodiments S101 to S103 of the present disclosure, and then trace points corresponding to the curve are generated according to the determined inflection points, which is specifically described as follows: dividing the curve into a plurality of sampling line segments based on the determined inflection points; sampling from each sampling line segment based on a preset sampling interval to obtain a plurality of track points; and taking a plurality of track points respectively sampled in the plurality of sampling line segments as track points corresponding to the curve.
Each sampling line segment in the plurality of sampling line segments takes an inflection point as an endpoint; the sampled plurality of trace points includes inflection points in the curve.
For example, if the curve to be drawn is as shown in fig. 6, the preset pixel point interception range includes: 7 pixel points, a threshold value is set to be 30 degrees, and based on the specific implementation manner shown in embodiments S101 to S103 of the present disclosure, the determined inflection points are shown in fig. 6, 11 inflection points are shown in fig. 6, after the inflection point corresponding to the curve to be drawn in fig. 6 is determined, the inflection point, and the starting point and the ending point of the curve to be drawn can be respectively used as the end points of the sampling line segments, so that the curve to be drawn is divided into 12 sampling line segments; then based on a preset sampling interval: and 10 pixel points, sampling the curve to be drawn, determining a plurality of track points in each sampling line segment (wherein the track points comprise inflection points), and displaying the plurality of track points, wherein a specific display interface can be shown in fig. 7.
In the embodiment of the disclosure, each section of intercepting curve is intercepted according to a preset pixel intercepting range, and each inflection point corresponding to the curve is determined by comparing the change of azimuth angle difference values corresponding to different sections of intercepting curves; after each inflection point corresponding to the curve is determined, generating and displaying a track point corresponding to the curve according to each determined inflection point, so that a user is instructed to draw the curve through the track point; here, through the inflection point in the predetermined curve, the problem that the accurate curve cannot be represented by the track point due to missing the inflection point caused by improper setting of the sampling interval in the process of sampling the curve according to the preset sampling interval is avoided, and therefore the accuracy of representing the curve by the track point is improved.
In addition, in the embodiment of the disclosure, each pixel point on the curve can be sequentially used as a interception starting point, a plurality of sections of interception curves corresponding to the curve to be drawn (the pixel points between the interception curves are coincident), and turning changes between the interception curves are determined by comparing the changes of azimuth angle difference values corresponding to the interception curves, so that each inflection point corresponding to the curve is determined, and the accuracy of inflection point identification is improved.
It will be appreciated by those skilled in the art that in the above-described method of the specific embodiments, the written order of steps is not meant to imply a strict order of execution but rather should be construed according to the function and possibly inherent logic of the steps.
Based on the same inventive concept, the embodiment of the disclosure further provides a track point generating device corresponding to the track point generating method, and since the principle of solving the problem by the device in the embodiment of the disclosure is similar to that of the track point generating method in the embodiment of the disclosure, the implementation of the device can refer to the implementation of the method, and the repetition is omitted.
Referring to fig. 8, a schematic diagram of a track point generating device 800 according to an embodiment of the disclosure is provided, where the track point generating device includes: an acquisition module 801, a first processing module 802, a determination module 803, and a second processing module 804; wherein:
an obtaining module 801, configured to obtain a curve to be drawn.
The first processing module 802 is configured to intercept each section of interception curves according to a preset pixel interception range; wherein, the pixel points between the intercepting curves of the intercepting adjacent segments are coincided.
A determining module 803, configured to determine each inflection point corresponding to the curve by comparing changes of azimuth difference values corresponding to different section intercepting curves; the azimuth difference is the difference of azimuth angles of different line segments in the intercepting curve.
The second processing module 804 is configured to generate and display a track point corresponding to the curve according to the determined inflection points; the track points are used for indicating a user to draw a curve.
In one possible implementation manner, the first processing module 802 is specifically configured to, when executing the respective intercepting curves intercepted according to the preset intercepting range of the pixel points: and according to a preset pixel point interception range, sequentially taking each pixel point on the curve as an interception starting point, and intercepting each section of interception curve respectively.
In one possible implementation manner, the determining module 803 is specifically configured to, when performing the determining the respective inflection points corresponding to the curves by comparing the changes of the azimuth difference values corresponding to the different segment cut curves: determining a first intercepting curve when the corresponding azimuth difference value is increased from being smaller than a set threshold value to being larger than or equal to the set threshold value and a second intercepting curve when the corresponding azimuth difference value intercepted after intercepting the first intercepting curve is reduced from being larger than the set threshold value to being smaller than or equal to the set threshold value by comparing azimuth difference values corresponding to the intercepting curves of different sections; and determining an inflection point corresponding to the curve based on the first intercepting curve and the second intercepting curve.
In one possible implementation, the determining module 803 determines the azimuth difference value according to the following steps: and determining an azimuth angle difference value corresponding to each section of intercepting curve based on azimuth angles corresponding to the front half line segment and the rear half line segment corresponding to the section of intercepting curve.
In a possible implementation manner, when the determining module 803 determines the first clipping curve and the second clipping curve, the determining module is specifically configured to: if the azimuth angle difference value corresponding to the current section of intercepting curve is larger than or equal to a set threshold value and the azimuth angle difference value corresponding to the previous section of intercepting curve of the current section of intercepting curve is smaller than the set threshold value, taking the current section of intercepting curve as the first intercepting curve; and if the azimuth angle difference value corresponding to the current section of intercepting curve is smaller than or equal to a set threshold value and the azimuth angle difference value corresponding to the intercepting curve of the previous section of intercepting curve of the current section is larger than the set threshold value, taking the intercepting curve of the current section as the second intercepting curve.
In a possible implementation manner, the determining module 803 is specifically configured to, when executing the determining the inflection point corresponding to the curve based on the first clipping curve and the second clipping curve: acquiring a first midpoint of the first intercepting curve and a second midpoint of the second intercepting curve; and calculating a midpoint between the first midpoint and the second midpoint, and taking the midpoint as one inflection point.
In a possible implementation manner, when the second processing module 804 generates and displays the track point corresponding to the curve according to the determined inflection points, the second processing module is specifically configured to: dividing the curve into a plurality of sampling line segments based on the determined inflection points; the inflection point is an end point of the sampling line segment; sampling from each sampling line segment based on a preset sampling interval to obtain a plurality of track points; the plurality of track points comprise inflection points in a curve; and taking a plurality of track points respectively sampled in the plurality of sampling line segments as track points corresponding to the curve.
In the embodiment of the disclosure, each section of intercepting curve is intercepted according to a preset pixel intercepting range, and each inflection point corresponding to the curve is determined by comparing the change of azimuth angle difference values corresponding to different sections of intercepting curves; after each inflection point corresponding to the curve is determined, generating and displaying a track point corresponding to the curve according to each determined inflection point, so that a user is instructed to draw the curve through the track point; here, through the inflection point in the predetermined curve, the problem that the accurate curve cannot be represented by the track point due to missing the inflection point caused by improper setting of the sampling interval in the process of sampling the curve according to the preset sampling interval is avoided, and therefore the accuracy of representing the curve by the track point is improved.
In addition, in the embodiment of the disclosure, each pixel point on the curve can be sequentially used as a interception starting point, a plurality of sections of interception curves corresponding to the curve to be drawn (the pixel points between the interception curves are coincident), and turning changes between the interception curves are determined by comparing the changes of azimuth angle difference values corresponding to the interception curves, so that each inflection point corresponding to the curve is determined, and the accuracy of inflection point identification is improved.
The process flow of each module in the apparatus and the interaction flow between the modules may be described with reference to the related descriptions in the above method embodiments, which are not described in detail herein.
Based on the same technical conception, the embodiment of the application also provides computer equipment. Referring to fig. 9, a schematic structural diagram of a computer device 900 according to an embodiment of the present application includes a processor 901, a memory 902, and a bus 903. The memory 902 is configured to store execution instructions, including a memory 9021 and an external memory 9022; the memory 9021 is also referred to as an internal memory, and is used for temporarily storing operation data in the processor 901 and data exchanged with an external memory 9022 such as a hard disk, the processor 901 exchanges data with the external memory 9022 through the memory 9021, and when the computer device 900 is running, the processor 901 and the memory 902 communicate through the bus 903, so that the processor 901 executes the following instructions:
Acquiring a curve to be drawn; intercepting each section of intercepting curve according to a preset intercepting range of pixel points; wherein, the pixel points between the intercepting curves of the intercepted adjacent sections are overlapped; determining each inflection point corresponding to the curve by comparing the change of azimuth angle difference values corresponding to the different sections of intercepting curves; the azimuth angle difference value is the difference of azimuth angles of different line segments in the intercepting curve; generating and displaying track points corresponding to the curve according to the determined inflection points; the track points are used for indicating a user to draw a curve.
The specific processing flow of the processor 901 may refer to the descriptions of the above method embodiments, and will not be described herein.
The disclosed embodiments also provide a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the track point generating method described in the above method embodiments. Wherein the storage medium may be a volatile or nonvolatile computer readable storage medium.
The embodiments of the present disclosure further provide a computer program product, where the computer program product carries a program code, where instructions included in the program code may be used to perform the steps of the track point generating method described in the foregoing method embodiments, and specifically reference may be made to the foregoing method embodiments, which are not described herein in detail.
Wherein the above-mentioned computer program product may be realized in particular by means of hardware, software or a combination thereof. In an alternative embodiment, the computer program product is embodied as a computer storage medium, and in another alternative embodiment, the computer program product is embodied as a software product, such as a software development kit (Software Development Kit, SDK), or the like.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described system and apparatus may refer to corresponding procedures in the foregoing method embodiments, which are not described herein again. In the several embodiments provided in the present disclosure, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. The above-described apparatus embodiments are merely illustrative, for example, the division of the units is merely a logical function division, and there may be other manners of division in actual implementation, and for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some communication interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the present disclosure may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer readable storage medium executable by a processor. Based on such understanding, the technical solution of the present disclosure may be embodied in essence or a part contributing to the prior art or a part of the technical solution, or in the form of a software product stored in a storage medium, including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in the embodiments of the present disclosure. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Finally, it should be noted that: the foregoing examples are merely specific embodiments of the present disclosure, and are not intended to limit the scope of the disclosure, but the present disclosure is not limited thereto, and those skilled in the art will appreciate that while the foregoing examples are described in detail, it is not limited to the disclosure: any person skilled in the art, within the technical scope of the disclosure of the present disclosure, may modify or easily conceive changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features thereof; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the disclosure, and are intended to be included within the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.
Claims (9)
1. A track point generating method, characterized by comprising:
acquiring a curve to be drawn;
intercepting each section of intercepting curve according to a preset intercepting range of pixel points; wherein, the pixel points between the intercepting curves of the intercepted adjacent sections are overlapped;
Determining each inflection point corresponding to the curve by comparing the change of azimuth angle difference values corresponding to the different sections of intercepting curves; the azimuth angle difference value is the difference of azimuth angles of different line segments in the intercepting curve; determining a first intercepting curve when the corresponding azimuth difference value is increased from being smaller than a set threshold value to being larger than or equal to the set threshold value and a second intercepting curve when the corresponding azimuth difference value intercepted after intercepting the first intercepting curve is reduced from being larger than the set threshold value to being smaller than or equal to the set threshold value by comparing azimuth difference values corresponding to the intercepting curves of different sections; determining an inflection point corresponding to the curve based on the first intercepting curve and the second intercepting curve;
generating and displaying track points corresponding to the curve according to the determined inflection points; the track points are used for indicating a user to draw a curve.
2. The track point generating method as claimed in claim 1, wherein each segment of the intercepting curve is intercepted according to a preset pixel point intercepting range, respectively, comprising:
and according to a preset pixel point interception range, sequentially taking each pixel point on the curve as an interception starting point, and intercepting each section of interception curve respectively.
3. The trajectory point generation method according to claim 1, characterized in that the azimuth difference value is determined according to the steps of:
and determining an azimuth angle difference value corresponding to each section of intercepting curve based on azimuth angles corresponding to the front and rear sections of line segments corresponding to the section of intercepting curve.
4. The trajectory point generation method according to claim 1, wherein determining the first and second clipping curves includes:
if the azimuth angle difference value corresponding to the current section of intercepting curve is larger than or equal to a set threshold value and the azimuth angle difference value corresponding to the previous section of intercepting curve of the current section of intercepting curve is smaller than the set threshold value, taking the current section of intercepting curve as the first intercepting curve;
and if the azimuth angle difference value corresponding to the current section of intercepting curve is smaller than or equal to a set threshold value and the azimuth angle difference value corresponding to the intercepting curve of the previous section of intercepting curve of the current section is larger than the set threshold value, taking the intercepting curve of the current section as the second intercepting curve.
5. The trajectory point generation method according to claim 1, wherein the determining an inflection point corresponding to the curve based on the first truncated curve and the second truncated curve includes:
Acquiring a first midpoint of the first intercepting curve and a second midpoint of the second intercepting curve;
and calculating a midpoint between the first midpoint and the second midpoint, and taking the midpoint as one inflection point.
6. The method for generating a trace point according to claim 1, wherein generating and displaying the trace point corresponding to the curve according to the determined inflection points includes:
dividing the curve into a plurality of sampling line segments based on the determined inflection points; the inflection point is an end point of the sampling line segment;
sampling from each sampling line segment based on a preset sampling interval to obtain a plurality of track points; the plurality of track points comprise inflection points in a curve;
and taking a plurality of track points respectively sampled in the plurality of sampling line segments as track points corresponding to the curve.
7. A track point generating device, comprising:
the acquisition module is used for acquiring a curve to be drawn;
the first processing module is used for intercepting each section of intercepting curve according to a preset intercepting range of pixel points; wherein, the pixel points between the intercepting curves of the intercepted adjacent sections are overlapped;
the determining module is used for determining each inflection point corresponding to the curve by comparing the change of azimuth angle difference values corresponding to the different section intercepting curves; the azimuth angle difference value is the difference of azimuth angles of different line segments in the intercepting curve; determining a first intercepting curve when the corresponding azimuth difference value is increased from being smaller than a set threshold value to being larger than or equal to the set threshold value and a second intercepting curve when the corresponding azimuth difference value intercepted after intercepting the first intercepting curve is reduced from being larger than the set threshold value to being smaller than or equal to the set threshold value by comparing azimuth difference values corresponding to the intercepting curves of different sections; determining an inflection point corresponding to the curve based on the first intercepting curve and the second intercepting curve;
The second processing module is used for generating and displaying track points corresponding to the curve according to the determined inflection points; the track points are used for indicating a user to draw a curve.
8. A computer device, comprising: a processor, a memory storing machine-readable instructions executable by the processor for executing the machine-readable instructions stored in the memory, which when executed by the processor, perform the steps of the trace point generation method according to any one of claims 1 to 6.
9. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program which, when run by a computer device, performs the steps of the trajectory point generation method according to any one of claims 1 to 6.
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