CN112711644B - Electronic signature processing method, device and system for map data and storage medium - Google Patents
Electronic signature processing method, device and system for map data and storage medium Download PDFInfo
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Abstract
The invention provides a method, a device, a system and a storage medium for processing an electronic signature of map data, wherein the method comprises the following steps: selecting linear data from the map data; the linear data refers to road elements composed of shape points; inserting watermark point string data into the linear data; and displaying corresponding electronic signature information in the map according to the watermark point string data. According to the invention, the electronic signature information can be represented by the distance information between the points embedded in the map data, so that the electronic signature can be flexibly added into the map data, the effective recording of the ownership of the data is realized, the cracking difficulty of the map data is improved, and the copyright of the map data is better maintained.
Description
Technical Field
The present invention relates to the field of high-precision map technologies, and in particular, to a method, an apparatus, a system, and a storage medium for processing an electronic signature of map data.
Background
High-precision maps are an important support technology indispensable for automatic driving, and with the development and popularization of computer technology and the internet, and the progress of multimedia data storage and transmission technology, the transmission and sharing of digital products are very easy, which also makes illegal copying of digital products very easy.
Currently, modification of POI (point of interest ) information in a high-precision map or special topography of road elements is generally adopted to identify data ownership of the high-precision map.
However, the marking mode of the data ownership can only use the geometric information and the type attribute information in the high-precision map to mark the data ownership, and can not add text information, so that the marking mode is easy to be broken by a data stealer and is not beneficial to copyright protection of the high-precision map.
Disclosure of Invention
The invention provides a method, a device, a system and a storage medium for processing an electronic signature of map data, wherein the electronic signature information can be represented by the distance information between points embedded in the map data, so that the electronic signature can be flexibly added into the map data, the effective recording of the ownership of the data is realized, the cracking difficulty of the map data is improved, and the copyright of the map data is better maintained.
In a first aspect, an embodiment of the present invention provides a method for processing an electronic signature of map data, including:
Selecting linear data from the map data; the linear data refers to road elements composed of shape points;
inserting watermark point string data into the linear data;
And displaying corresponding electronic signature information in the map according to the watermark point string data.
In a second aspect, an embodiment of the present invention provides an electronic signature processing apparatus for map data, including:
the selecting module is used for selecting linear data from the map data; the linear data refers to road elements composed of shape points;
the processing module is used for inserting watermark point string data into the linear data;
and the display module is used for displaying corresponding electronic signature information in the map according to the watermark point string data.
In a third aspect, an embodiment of the present invention provides an electronic signature processing system for map data, including: a memory and a processor loaded with a program for executing the electronic signature processing method of map data according to any one of the first aspects when the program is executed.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the electronic signature processing method of map data according to the first aspect.
The invention provides an electronic signature processing method, device, system and storage medium of map data, wherein linear data are selected from the map data; the linear data refers to road elements composed of shape points; inserting watermark point string data into the linear data; and displaying corresponding electronic signature information in the map according to the watermark point string data. According to the invention, the electronic signature information can be represented by the distance information between the points embedded in the map data, so that the electronic signature can be flexibly added into the map data, the effective recording of the ownership of the data is realized, the cracking difficulty of the map data is improved, and the copyright of the map data is better maintained.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic diagram of an application scenario of the present invention;
Fig. 2 is a flowchart of a method for processing an electronic signature of map data according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of linear data prior to processing according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of linear data after processing according to an embodiment of the present invention;
fig. 5 is a flowchart of a method for processing an electronic signature of map data according to a second embodiment of the present invention;
Fig. 6 is a schematic structural diagram of an electronic signature processing device for map data according to a third embodiment of the present invention;
fig. 7 is a schematic structural diagram of an electronic signature processing device for map data according to a fourth embodiment of the present invention;
fig. 8 is a schematic structural diagram of an electronic signature processing system for map data according to a fifth embodiment of the present invention.
Specific embodiments of the present disclosure have been shown by way of the above drawings and will be described in more detail below. These drawings and the written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the disclosed concepts to those skilled in the art by reference to specific embodiments.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terms "first," "second," "third," "fourth" and the like in the description and in the claims and in the above drawings, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented, for example, in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The technical scheme of the invention is described in detail below by specific examples. The following embodiments may be combined with each other, and some embodiments may not be repeated for the same or similar concepts or processes.
High-precision maps are an important support technology indispensable for automatic driving, and with the development and popularization of computer technology and the internet, and the progress of multimedia data storage and transmission technology, the transmission and sharing of digital products are very easy, which also makes illegal copying of digital products very easy.
Currently, modification of POI information in a high-precision map or special shape processing of road elements is generally adopted to identify data ownership of the high-precision map. However, the marking mode of the data ownership can only use the geometric information and the type attribute information in the high-precision map to mark the data ownership, and can not add text information, so that the marking mode is easy to be broken by a data stealer and is not beneficial to copyright protection of the high-precision map.
Aiming at the technical problems, the invention provides a method which can convert the electronic signature information into the coding information and then characterize the coding information through the distance information between the points embedded in the map data, so that the electronic signature can be flexibly added into the map data, the effective recording of the data ownership is realized, the cracking difficulty of the map data is improved, and the copyright of the map data is better maintained.
Fig. 1 is a schematic diagram of an application scenario of the present invention, as shown in fig. 1, the linear data refers to a road element composed of shape points, where the road element includes: lane markings, curbs, guardrails. The map data includes these road elements, and thus, linear data can be selected from the map data. Then, converting the electronic signature information into code information according to a preset coding scheme; and determining the number of points in the watermark point string data and the distance ratio between every two adjacent watermark points according to the coding information. Watermark point string data is then inserted into the linear data. Specifically, two adjacent shape points are arbitrarily selected as reference points in the linear data; according to the coordinates of the datum points, the distance between the datum points is obtained; replacing any two adjacent points in watermark point string data with datum points; sequentially calculating coordinates of all points in watermark point string data according to the number of points in the watermark point string data and the distance ratio between all adjacent watermark points by taking the coordinates of the reference points and the distance between the reference points as references; and inserting watermark point string data into the linear data according to the coordinates of each point in the watermark point string data. And finally, displaying the corresponding electronic signature information in the map. When calculating coordinates of each point in watermark point string data, it is necessary to sequentially determine the coordinates according to the data trend of the shape point, that is, to keep the trends of the inserted watermark point and the shape point as uniform as possible.
By applying the method, the electronic signature information can be represented by the distance information between the points embedded in the map data, so that the electronic signature can be flexibly added into the map data, the effective recording of the ownership of the data is realized, the cracking difficulty of the map data is improved, and the copyright of the map data is better maintained.
The following describes the technical scheme of the present application and how the technical scheme of the present application solves the above technical problems in detail with specific embodiments. The following embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments. Embodiments of the present application will be described below with reference to the accompanying drawings.
Fig. 2 is a flowchart of a method for processing an electronic signature of map data according to a first embodiment of the present invention, as shown in fig. 2, the method in this embodiment may include:
s101, linear data is selected from map data.
In this embodiment, the linear data is a road element composed of shape points, and the road element includes: lane markings, curbs, guardrails. The map data includes these road elements, and therefore, linear data can be selected from the map data, thereby obtaining shape point information.
In one possible implementation, the map is divided into a preset number of regions, and different types of linear data are randomly selected within each region.
For example, the number of meshes may be determined according to a scale or the like, and then the map may be uniformly divided into a preset number of meshes. For example, a map of 1:100 meters is divided into 100 grid areas. Then, different types of linear data, such as road elements of lane markings, curbs, guardrails and the like, are randomly selected in the grid area. In addition, grid division can be performed according to administrative areas. A single kind of road element is selected, and there may be a case where the kind of linear data is replaced as a whole, or the like. Therefore, the map data decoding method and device can better improve the decoding difficulty of the map data by randomly selecting different types of linear data.
It is also possible to divide the area into a plurality of areas uniformly, and then randomly select different types of linear data within each area.
For example, the areas may be divided according to roads, and the areas of each area may or may not be equal. For example, dividing the urban area into an area within a loop according to the loop, and an area between the loop and the loop; the region between the two and three rings, the region outside the three rings, etc.
It should be noted that, the embodiment is not limited to a specific map dividing manner, and a person skilled in the art may adjust the scheme according to the actual situation.
S102, inserting watermark point string data into the linear data.
In this embodiment, the electronic signature information is converted into watermark point string data, where the watermark point string data includes a distance ratio between watermark points, and no specific coordinate value of the watermark points on the map is known at this time; the specific coordinates of the watermark points need to be determined from the shape points. Watermark point string data is inserted into the linear data, and electronic signatures can be flexibly added into the map data without affecting the accuracy of the map data, so that the effective recording of data ownership is realized, and the copyright of the map data is maintained.
In a first alternative, at least one shape point may be selected from the linear data to replace a corresponding watermark point in the watermark point string data; taking the replaced watermark points as reference points, and acquiring coordinates of each watermark point in watermark point string data; and inserting watermark point string data into the linear data according to the coordinates of each watermark point in the watermark point string data.
Illustratively, two adjacent shape points can be arbitrarily selected from the linear data to replace two arbitrary adjacent watermark points in the watermark point string data, and the replaced watermark points are taken as reference points; according to the coordinates of the datum points, the distance between the datum points is obtained; sequentially calculating coordinates of each watermark point in the watermark point string data according to the number of watermark points in the watermark point string data and the distance ratio between each two adjacent watermark points by taking the datum point as a reference; and inserting watermark point string data into the linear data according to the coordinates of each watermark point in the watermark point string data.
Illustratively, any watermark point in the watermark point string data can be replaced by any shape point in the linear data, and the replaced watermark point is taken as a reference point; sequentially calculating coordinates of each watermark point in the watermark point string data according to the set reference distance and the distance ratio of each watermark point in the watermark point string to the reference point; and inserting watermark point string data into the linear data according to the coordinates of each watermark point in the watermark point string data.
For example, the position of the reference point can also be determined from two adjacent shape points, wherein the reference point does not coincide with the two adjacent shape points; sequentially calculating coordinates of each watermark point in the watermark point string data according to the set reference distance and the distance ratio of each watermark point in the watermark point string to the reference point; and inserting watermark point string data into the linear data according to the coordinates of each watermark point in the watermark point string data. For example, a midpoint position between two adjacent shape points may be selected as the reference point; or calculating a certain position between adjacent shape points according to an encryption algorithm to be used as a reference point.
In particular, the principle of the present invention is that the encoded information is characterized by the point-to-point distance information in the point string. Fig. 3 is a schematic diagram of linear data before processing provided in an embodiment of the present invention, fig. 4 is a schematic diagram of linear data after processing provided in an embodiment of the present invention, and, in conjunction with fig. 3 and fig. 4, circles represent shape points in the linear data, and triangles represent insertion points of watermark point string data. For example, 8 points are recorded in watermark point string data, and the points are recorded by 7 distance ratios of points to points, namely 78, 65, 85, 73, 78, 70 and 79. First, two adjacent shape points are arbitrarily selected as reference points in fig. 3. In the present schematic diagram, the second point and the third point are selected as reference points. According to the coordinates of the datum points, the distance between the datum points is obtained, and any two adjacent watermark points in watermark point string data are replaced by the datum points. In the present schematic diagram, the second point and the third point in the watermark point string data are used as replacement points, i.e., the distance between the two reference points is used as 65. And then, according to the number of points in the watermark point string data, the distance ratio between every two adjacent points and the data trend of the shape points, the coordinates of each point in the watermark point string data are sequentially calculated, and the watermark point string data are inserted into the linear data. In the present schematic diagram, coordinates of insertion points are sequentially calculated with reference to the reference points, and the insertion points are shown as triangles. In this embodiment, the original shape point data of the high-precision map is used to prevent the insertion point string from being found and destroyed, so that effective recording of the ownership of the data can be more effectively realized, and copyrights of the map data are maintained.
In another possible embodiment, before inserting watermark point string data into the linear data, the method further includes: acquiring electronic signature information to be added; converting the electronic signature information into coded information; and determining the number of points in the watermark point string data and the distance ratio between each two adjacent points according to the coding information.
Specifically, the electronic signature information may be flexibly set according to the map version, or a plurality of electronic signature information may be set, which is not limited herein. For example, different watermarks may be set in different versions, or a plurality of watermark point strings may be included in one version, for example, a plurality of character strings such as a vector, CHINASELFDRIVING, highDefinition may be stored as encrypted content at the same time, and the lengths of the character strings may be different. The electronic signature information is then converted into encoded information. For example, ASIIC table letter values may be used as the encoding scheme, and if the electronic signature information is NAVINFO, the letters are sequentially converted into corresponding ASIIC values, namely N-78, A-65, V-86, I-73, N-78, F-70 and O-79. Watermark dot string data of 8 dots in total is then obtained, and the dot-to-dot 7 distance ratios are 78, 65, 85, 73, 78, 70, 79, respectively.
It should be noted that, the present embodiment is not limited to the content of the electronic signature information, and those skilled in the art may increase or decrease the number, length, and content information of the electronic signature information according to the actual situation. Meanwhile, the embodiment is not limited to the encoding mode of the electronic signature information, and a person skilled in the art can select a suitable encoding mode of the electronic signature information according to actual situations. For example, coding schemes other than ASIIC table alphabetic value coding schemes may also be employed.
In yet another alternative embodiment, to prevent the watermark from being discovered, changes may also be made to the form of the watermark, which may include, but are not limited to, the following:
1) Different watermark point string data are set according to different map versions, for example, the number of watermark points is set in the map of different versions, and/or the distance ratio between the watermark points is different.
2) Different shape points are selected as reference points, for example 1-2 shape points are selected as reference points, and watermark points are then inserted according to the positions of the reference points.
3) Converting the distance between watermark points in the watermark point string data, for example converting the distance by a preset formula; the conversion formula may be: f=2x-100, or f= (x-70) × (x-70), where f represents the distance between the watermark point and the reference point and x represents the sequence number of the watermark point. Note that, the present embodiment is not limited to the distance conversion formula, and specific values of the distance values between watermark points.
4) When the watermark point is inserted, the watermark point and the shape point are set to be misaligned.
5) When the watermark point is inserted, the position of the inserted watermark point can be finely adjusted, so that the inserted watermark point and two adjacent points are prevented from being positioned on the same straight line.
6) And setting fixed watermark points and random watermark points in watermark point string data, wherein the positions of the inserted random watermark points are different in maps of different versions.
7) Since the distances between watermark points in the watermark point string data are used for recording effective information, information related to company information can be added to facilitate verification.
8) And setting a large number of encryption points in the watermark point string data, wherein the large number of encryption points are used for recording effective information, and after part of encryption points are edited or removed, effective information of encryption point characterization is not affected.
9) The effective information is recorded by the watermark points of a long distance, so that the effective information can be kept in the map. This approach is applicable in cases where the watermark is trimmed, i.e. the trimmed watermark is still able to record valid information.
And S103, displaying corresponding electronic signature information in the map according to the watermark point string data.
In this embodiment, the corresponding electronic signature information may be displayed in the map according to the watermark point string data, so as to display copyright information of the map data.
In the embodiment, linear data is selected from map data; the linear data refers to road elements composed of shape points; inserting watermark point string data into the linear data; and displaying corresponding electronic signature information in the map according to the watermark point string data. According to the invention, the electronic signature information can be represented by the distance information between the points embedded in the map data, so that the electronic signature can be flexibly added into the map data, the effective recording of the ownership of the data is realized, the cracking difficulty of the map data is improved, and the copyright of the map data is better maintained.
Fig. 5 is a flowchart of a method for processing an electronic signature of map data according to a second embodiment of the present invention, as shown in fig. 5, the method in this embodiment may include:
s201, linear data is selected from map data.
S202, watermark point string data are inserted into the linear data.
And S203, displaying corresponding electronic signature information in the map according to the watermark point string data.
In this embodiment, the specific implementation process and technical principle of step S201 to step S203 refer to the related descriptions in step S101 to step S103 in the method shown in fig. 2, and are not described herein again.
S204, obtaining detection data from the map to be detected, and performing map data infringement detection.
In this embodiment, detection data is obtained from a map to be detected; comparing the detection data with watermark point string data to obtain a target point matched with the watermark point string data in the detection data; the target point is a point in which the deviation between the coordinate point in the detection data and the coordinate point in the watermark point string data is within a preset range; if the number of the target points is greater than a preset threshold, determining that the map to be detected has map data infringement.
Specifically, when the data to be detected is obtained, the electronic signature point string position information recorded before the data release is used for comparison detection, and a detection result is obtained. If the electronic signature point string is found in the detection result, the detected data and the electronic signature adding data can be identified as the same source. In view of slight positional deviation and distance variation, it is necessary to increase tolerance in electronic signature detection to prevent interference. For example, assume that coordinates corresponding to detection points on a high-precision map are (X1, Y1, Z1); coordinates of the electronic signature points are (X2, Y2, Z2); if the difference between X1 and X2 is within the preset range, the difference between Y1 and Y2 is within the preset range, and the difference between Z1 and Z2 is within the preset range, the two are considered to be the same point.
In the embodiment, linear data is selected from map data; the linear data refers to road elements composed of shape points; and displaying corresponding electronic signature information in the map according to the watermark point string data. According to the invention, the electronic signature information can be represented by the distance information between the points embedded in the map data, so that the electronic signature can be flexibly added into the map data, the effective recording of the ownership of the data is realized, the cracking difficulty of the map data is improved, and the copyright of the map data is better maintained.
In addition, the implementation can acquire detection data from the map to be detected, and perform map data infringement detection, so that copyrights of the map data are better maintained.
Fig. 6 is a schematic structural diagram of an electronic signature processing device for map data according to a third embodiment of the present invention, as shown in fig. 6, the device in this embodiment may include:
a selection module 31 for selecting linear data from the map data; the linear data refers to road elements composed of shape points;
A processing module 32 for inserting watermark point string data into the linear data;
and the display module 33 is used for displaying corresponding electronic signature information in the map according to the watermark point string data.
Optionally, the processing module 32 is specifically configured to:
selecting at least one shape point from the linear data to replace a corresponding watermark point in the watermark point string data;
Taking the replaced watermark points as reference points, and acquiring coordinates of each watermark point in watermark point string data;
and inserting watermark point string data into the linear data according to the coordinates of each watermark point in the watermark point string data.
Optionally, the selecting module 31 is specifically configured to:
dividing the map into a preset number of areas;
Different types of linear data are randomly selected within each region.
Optionally, the processing module 32 is specifically configured to:
Randomly selecting two adjacent shape points from the linear data to replace any two adjacent watermark points in the watermark point string data, and taking the replaced watermark points as datum points;
according to the coordinates of the datum points, the distance between the datum points is obtained;
Sequentially calculating coordinates of each watermark point in the watermark point string data according to the number of watermark points in the watermark point string data and the distance ratio between each two adjacent watermark points by taking the datum point as a reference;
and inserting watermark point string data into the linear data according to the coordinates of each watermark point in the watermark point string data.
Optionally, the processing module 32 is specifically configured to:
randomly selecting a shape point from the linear data to replace any watermark point in the watermark point string data, and taking the replaced watermark point as a reference point;
sequentially calculating coordinates of each watermark point in the watermark point string data according to the set reference distance and the distance ratio of each watermark point in the watermark point string to the reference point;
and inserting watermark point string data into the linear data according to the coordinates of each watermark point in the watermark point string data.
Optionally, the processing module 32 is specifically configured to:
Arbitrarily selecting two adjacent shape points from the linear data;
Determining the position of a datum point according to two adjacent shape points, wherein the datum point is not overlapped with the two adjacent shape points;
sequentially calculating coordinates of each watermark point in the watermark point string data according to the set reference distance and the distance ratio of each watermark point in the watermark point string to the reference point;
and inserting watermark point string data into the linear data according to the coordinates of each watermark point in the watermark point string data.
The electronic signature processing device for map data in this embodiment may execute the technical scheme in the method shown in fig. 2, and the specific implementation process and technical principle thereof refer to the related description in the method shown in fig. 2, which is not repeated here.
In the embodiment, linear data is selected from map data; the linear data is a road element composed of shape points, and the road element includes: lane marking, curbs and guardrails; inserting watermark point string data into the linear data; the watermark point string data contains coordinate information of each point; and displaying corresponding electronic signature information in the map according to the watermark point string data. According to the invention, the electronic signature information can be represented by the distance information between the points embedded in the map data, so that the electronic signature can be flexibly added into the map data, the effective recording of the ownership of the data is realized, the cracking difficulty of the map data is improved, and the copyright of the map data is better maintained.
Fig. 7 is a schematic structural diagram of an electronic signature processing device for map data according to a fourth embodiment of the present invention, as shown in fig. 7, where the electronic signature processing device for map data according to the present embodiment may further include, based on the device shown in fig. 6:
The preprocessing module 34 is specifically configured to:
acquiring electronic signature information to be added;
Converting the electronic signature information into coded information;
and determining the number of points in the watermark point string data and the distance ratio between every two adjacent watermark points according to the coding information.
The detection module 35 is specifically configured to:
acquiring detection data from a map to be detected;
Comparing the detection data with watermark point string data to obtain a target point matched with the watermark point string data in the detection data; the target point is a point in which the deviation between the coordinate point in the detection data and the coordinate point in the watermark point string data is within a preset range;
If the number of the target points is greater than a preset threshold, determining that the map to be detected has map data infringement.
The electronic signature processing device for map data in this embodiment may execute the technical schemes in the methods shown in fig. 2 and 5, and the specific implementation process and technical principle thereof refer to the related descriptions in the methods shown in fig. 2 and 5, which are not repeated here.
In the embodiment, linear data is selected from map data; the linear data refers to road elements composed of shape points; inserting watermark point string data into the linear data; and displaying corresponding electronic signature information in the map according to the watermark point string data. According to the invention, the electronic signature information can be represented by the distance information between the points embedded in the map data, so that the electronic signature can be flexibly added into the map data, the effective recording of the ownership of the data is realized, the cracking difficulty of the map data is improved, and the copyright of the map data is better maintained.
In addition, the implementation can acquire detection data from the map to be detected, and perform map data infringement detection, so that copyrights of the map data are better maintained.
Fig. 8 is a schematic structural diagram of an electronic signature processing system for map data according to a fifth embodiment of the present invention, as shown in fig. 8, a system 40 of the present embodiment may include: a processor 41 and a memory 42.
A memory 42 for storing a computer program (such as an application program, a function module, etc. for implementing the electronic signature processing method of map data described above), computer instructions, etc.;
The computer programs, computer instructions, etc. described above may be stored in one or more of the memories 42 in partitions. And the above-described computer programs, computer instructions, data, etc. may be called by the processor 41.
A processor 41 for executing a computer program stored in a memory 42 for carrying out the steps of the method according to the above-described embodiment.
Reference may be made in particular to the description of the embodiments of the method described above.
The processor 41 and the memory 42 may be separate structures or may be integrated structures integrated together. When the processor 41 and the memory 42 are separate structures, the memory 42 and the processor 41 may be coupled and connected by a bus 43.
The server of this embodiment may execute the technical solutions in the methods shown in fig. 3 and fig. 5, and specific implementation processes and technical principles thereof refer to related descriptions in the methods shown in fig. 3 and fig. 5, which are not repeated herein.
In addition, the embodiment of the application further provides a computer-readable storage medium, wherein computer-executable instructions are stored in the computer-readable storage medium, and when at least one processor of the user equipment executes the computer-executable instructions, the user equipment executes the various possible methods.
Among them, computer-readable media include computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. In addition, the ASIC may reside in a user device. The processor and the storage medium may reside as discrete components in a communication device.
The present application also provides a program product comprising a computer program stored in a readable storage medium, from which the computer program can be read by at least one processor of a server, the at least one processor executing the computer program causing the server to implement the method of any one of the embodiments of the present application described above.
Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the method embodiments described above may be performed by hardware associated with program instructions. The foregoing program may be stored in a computer readable storage medium. The program, when executed, performs steps including the method embodiments described above; and the aforementioned storage medium includes: various media that can store program code, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (10)
1. An electronic signature processing method of map data, characterized by comprising:
Selecting linear data from the map data; the linear data refers to road elements composed of shape points;
inserting watermark point string data into the linear data;
displaying corresponding electronic signature information in a map according to the watermark point string data;
before inserting watermark point string data into the linear data, the method further comprises:
acquiring electronic signature information to be added;
Converting the electronic signature information into coded information; wherein, the coding information is represented by the distance information between points in the watermark point string data;
And determining the number of watermark points in the watermark point string data and the distance ratio between every two adjacent watermark points according to the coding information.
2. The method of claim 1, wherein inserting watermark point string data in the linear data comprises:
Selecting at least one shape point from the linear data to replace a corresponding watermark point in the watermark point string data;
taking the replaced watermark points as reference points, and acquiring coordinates of each watermark point in the watermark point string data;
and inserting the watermark point string data into the linear data according to the coordinates of each watermark point in the watermark point string data.
3. The method of claim 1, wherein selecting linear data from the map data comprises:
dividing the map into a preset number of areas;
Different types of linear data are randomly selected within each region.
4. The method of claim 1, wherein inserting watermark point string data in the linear data comprises:
Randomly selecting two adjacent shape points from the linear data to replace any two adjacent watermark points in the watermark point string data, and taking the replaced watermark points as reference points;
according to the coordinates of the datum points, the distance between the datum points is obtained;
sequentially calculating coordinates of each watermark point in the watermark point string data according to the number of watermark points in the watermark point string data and the distance ratio between each adjacent watermark point by taking the datum point as a reference;
and inserting the watermark point string data into the linear data according to the coordinates of each watermark point in the watermark point string data.
5. The method of claim 1, wherein inserting watermark point string data in the linear data comprises:
randomly selecting a shape point from the linear data to replace any watermark point in the watermark point string data, and taking the replaced watermark point as a reference point;
sequentially calculating coordinates of each watermark point in the watermark point string data according to the set reference distance and the distance ratio of each watermark point in the watermark point string to the reference point;
and inserting the watermark point string data into the linear data according to the coordinates of each watermark point in the watermark point string data.
6. The method of claim 1, wherein inserting watermark point string data in the linear data comprises:
Arbitrarily selecting two adjacent shape points from the linear data;
determining the positions of reference points according to the two adjacent shape points, wherein the reference points are not overlapped with the two adjacent shape points;
sequentially calculating coordinates of each watermark point in the watermark point string data according to the set reference distance and the distance ratio of each watermark point in the watermark point string to the reference point;
and inserting the watermark point string data into the linear data according to the coordinates of each watermark point in the watermark point string data.
7. The method according to any one of claims 1-6, further comprising:
acquiring detection data from a map to be detected;
comparing the detection data with the watermark point string data to obtain a target point matched with the watermark point string data in the detection data; the target point is a point in which the deviation between the coordinate point in the detection data and the coordinate point in the point string data is within a preset range;
And if the number of the target points is greater than a preset threshold, determining that the map to be detected has map data infringement.
8. An electronic signature processing apparatus for map data, comprising:
the selecting module is used for selecting linear data from the map data; the linear data refers to road elements composed of shape points;
the processing module is used for inserting watermark point string data into the linear data;
the display module is used for displaying corresponding electronic signature information in the map according to the watermark point string data;
The preprocessing module is used for:
acquiring electronic signature information to be added;
Converting the electronic signature information into coded information; wherein, the coding information is represented by the distance information between points in the watermark point string data;
And determining the number of watermark points in the watermark point string data and the distance ratio between every two adjacent watermark points according to the coding information.
9. An electronic signature processing system of map data, comprising: a memory and a processor loaded with a program for performing the method of any of claims 1-7 when the program is executed.
10. A computer-readable storage medium, comprising: computer program which, when run on a computer, causes the computer to perform the method according to any of claims 1-7.
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