CN107506417B - High-fidelity earth surface coverage data iteration updating method and system - Google Patents
High-fidelity earth surface coverage data iteration updating method and system Download PDFInfo
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Abstract
The invention provides a high-fidelity earth surface coverage data iteration updating method and a high-fidelity earth surface coverage data iteration updating system, which relate to the technical field of geographic space information and comprise the steps of obtaining an earth surface coverage background data set in a background image layer; comparing the ground surface coverage background data set with the remote sensing image data set, and obtaining a plurality of background pattern spots and a plurality of change information according to a plurality of comparison results, wherein the background pattern spots comprise change pattern spots and pattern spots which are geometrically adjacent to the change pattern spots; extracting the plurality of change pattern spots and the plurality of geometrically adjacent pattern spots to a change layer respectively; updating the plurality of change patches in the change layer according to the plurality of change information, and obtaining a plurality of update background patches; element-level replacement is respectively carried out on the plurality of updated background patches and the plurality of background patches in the background image layer to obtain earth surface coverage complete set data, the pattern profile and the topological structure of the background data are strictly inherited, earth surface coverage updating operation is simplified, new topological problems are avoided, and the quality level of the updated image layer is guaranteed.
Description
Technical Field
The invention relates to the technical field of geospatial information, in particular to a high-fidelity earth surface coverage data iterative updating method and system.
Background
The ground surface coverage data reflects the real situation of ground surface coverage, and has important significance for refined national soil supervision, agriculture and forestry planning and ecological protection. The updating of the surface coverage data is an important means for keeping the timeliness of the surface coverage data.
The correct spatial topology of the surface coverage data is the primary factor for ensuring the surface coverage quality. In the traditional production of updating the ground surface coverage data, because the ground surface coverage change layer is independently collected, the ground surface coverage change pattern spots and the background pattern spots are not in a strict geometric constraint relation, the same collected pattern spots are not completely matched at the boundary, so that when the change layer and the background layer are fused and updated, serious topology errors such as pattern spot topology gaps, pattern spot topology overlapping, illegal polygons and the like cannot be avoided, generally, full-set data topology inspection and topology modification are required after updating and fusing, larger extra data inspection and modification workload is generated, the work efficiency of the production of updating the ground surface coverage data is reduced, and the topology error modification formed by updating cannot be completely reserved in the updated ground surface coverage data, so that the quality of the result data is seriously influenced.
Disclosure of Invention
In view of this, the present invention aims to provide a high fidelity earth surface coverage data iterative updating method and system, which strictly inherits the speckle outline and the topological structure of the background data, simplifies the earth surface coverage updating operation, ensures that no new topological problem is generated, and ensures the quality level of the updated layer.
In a first aspect, an embodiment of the present invention provides a high-fidelity earth covering data iterative update method, including:
acquiring a ground surface coverage background data set in a background image layer;
comparing the earth surface coverage background data set with the remote sensing image data set, and obtaining a plurality of background pattern spots and a plurality of change information according to a plurality of comparison results, wherein the background pattern spots comprise change pattern spots and pattern spots which are geometrically adjacent to the change pattern spots;
extracting the plurality of change pattern spots and the plurality of geometrically adjacent pattern spots to a change layer respectively;
updating the plurality of change pattern spots in the change layer according to the plurality of change information to obtain a plurality of update background pattern spots;
and respectively carrying out element level replacement on the plurality of updated background pattern spots and the plurality of background pattern spots in the background pattern layer to obtain earth surface coverage complete set data.
With reference to the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, where the comparing the ground surface coverage background data set with the remote sensing image data set, and obtaining a plurality of background patches and a plurality of change information according to a plurality of comparison results, where the background patches include a change patch and a patch geometrically adjacent to the change patch includes repeatedly performing the following processing until the ground surface coverage background data in the background layer are traversed:
comparing the first ground surface coverage background data with the first remote sensing image data, and obtaining a first change pattern spot under the condition that the first comparison result is inconsistent;
and obtaining first change information according to the first comparison result, wherein the first change information corresponds to the first change pattern spot.
With reference to the first aspect, an embodiment of the present invention provides a second possible implementation manner of the first aspect, where the extracting, to a change layer, the plurality of change patches and the plurality of geometrically neighboring patches includes repeatedly performing the following processes until all the change patches in the background layer are traversed:
and respectively extracting a first change pattern spot and a pattern spot which is geometrically adjacent to the first change pattern spot to a change layer.
With reference to the first aspect, an embodiment of the present invention provides a third possible implementation manner of the first aspect, where the updating the plurality of change patches in the change layer according to the plurality of change information and obtaining a plurality of update background patches includes repeatedly executing the following processing until all the change patches in the change layer are traversed:
judging a first change type of a first change pattern spot in the change layer according to first change information;
and updating the first change pattern spot according to the first change type and the first change information to obtain a first update background pattern spot.
With reference to the first aspect, an embodiment of the present invention provides a fourth possible implementation manner of the first aspect, where the updating the first change spot according to the first change type and the first change information to obtain a first updated background spot includes:
when the first change pattern spot is changed in a telescopic mode, cutting the first change pattern spot according to the first change information, and combining the first change pattern spot to a geometrically adjacent pattern spot with the same attribute value as the first change pattern spot to obtain a first update background pattern spot;
alternatively, the first and second electrodes may be,
and when the first change pattern spot has new type change, cutting the first change pattern spot according to the first change information, calling an attribute value from a classification system, and endowing the attribute value to the first change pattern spot to obtain the first update background pattern spot.
With reference to the first aspect, an embodiment of the present invention provides a fifth possible implementation manner of the first aspect, where the change information includes one or more of an outline, a center position, a shape, and an attribute value of the change patch.
With reference to the first aspect, an embodiment of the present invention provides a sixth possible implementation manner of the first aspect, where the performing element-level replacement on the plurality of updated background patches and the plurality of background patches in the background layer respectively to obtain the data of the earth surface coverage complete set includes repeatedly performing the following processes until all the updated background patches in the change layer are traversed:
and performing element-level replacement on the first updated background pattern spot in the change layer and the first background pattern spot in the background layer.
In a second aspect, an embodiment of the present invention further provides a high-fidelity iterative earth-covering data updating system, including:
the acquisition unit is used for acquiring a ground surface coverage background data set in the background image layer;
the comparison unit is used for comparing the earth surface coverage background data set with the remote sensing image data set, and obtaining a plurality of background pattern spots and a plurality of change information according to a plurality of comparison results, wherein the background pattern spots comprise change pattern spots and pattern spots which are geometrically adjacent to the change pattern spots;
the extraction unit is used for extracting the plurality of change pattern spots and the plurality of geometrically adjacent pattern spots to a change layer;
the updating unit is used for updating the plurality of change pattern spots in the change layer according to the plurality of change information and obtaining a plurality of update background pattern spots;
and the replacing unit is used for performing element-level replacement on the plurality of updated background patches and the plurality of background patches in the background image layer to obtain earth surface coverage complete set data.
With reference to the second aspect, an embodiment of the present invention provides a first possible implementation manner of the second aspect, where the updating unit is further configured to repeatedly perform the following processing until all the change patches in the change layer are traversed:
judging a first change type of a first change pattern spot in the change layer according to first change information;
and updating the first change pattern spot according to the first change type and the first change information to obtain a first update background pattern spot.
With reference to the second aspect, an embodiment of the present invention provides a second possible implementation manner of the second aspect, where the updating unit is further configured to, when the first changing pattern spot changes in a telescopic manner, cut out the first changing pattern spot according to the first change information, and merge the first changing pattern spot into a geometrically adjacent pattern spot having a same attribute value as the first changing pattern spot, so as to obtain a first updating background pattern spot;
alternatively, the first and second electrodes may be,
and when the first change pattern spot has new type change, cutting the first change pattern spot according to the first change information, calling an attribute value from a classification system, and endowing the attribute value to the first change pattern spot to obtain a first update background pattern spot.
The embodiment of the invention provides a high-fidelity earth surface coverage data iteration updating method and a system, which comprises the steps of obtaining an earth surface coverage background data set in a background image layer; comparing the ground surface coverage background data set with the remote sensing image data set, and obtaining a plurality of background pattern spots and a plurality of change information according to a plurality of comparison results, wherein the background pattern spots comprise change pattern spots and pattern spots which are geometrically adjacent to the change pattern spots; extracting the plurality of change pattern spots and the plurality of geometrically adjacent pattern spots to a change layer respectively; updating the plurality of change patches in the change layer according to the plurality of change information, and obtaining a plurality of update background patches; element-level replacement is respectively carried out on the plurality of updated background patches and the plurality of background patches in the background image layer to obtain earth surface coverage complete set data, the pattern profile and the topological structure of the background data are strictly inherited, earth surface coverage updating operation is simplified, new topological problems are avoided, and the quality level of the updated image layer is guaranteed.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a flowchart of a high-fidelity iterative earth covering data updating method according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating the occurrence of telescopic changes in the high-fidelity earth surface coverage data iterative update method according to the first embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating the occurrence of new-generation changes in the high-fidelity iterative earth-surface coverage data updating method according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a high-fidelity iterative earth covering data updating system according to a second embodiment of the present invention.
Icon: 10-an acquisition unit; 20-a comparison unit; 30-an extraction unit; 40-an update unit; 50-replacement unit.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
At present, in the conventional production of updating the ground surface coverage data, because the ground surface coverage change layer is independently collected, the ground surface coverage change pattern spots and the background pattern spots are not in a strict geometric constraint relationship, generally the same collected pattern spots are not completely matched at the boundary, so that when the change layer and the background layer are fused and updated, serious topological errors such as pattern spot topological gaps, pattern spot topological overlapping, illegal polygons and the like cannot be avoided, generally, the full-set data topological check and topological modification are required to be performed after the updating and the fusion, larger extra data check and modification workload is generated, the work efficiency of the production of updating the ground surface coverage data is reduced, and the topological error modification formed by the updating cannot be completely reserved in the updated ground surface coverage data, so that the quality of the result data is seriously influenced.
Based on the above, the high-fidelity earth surface coverage data iteration updating method and system provided by the embodiment of the invention strictly inherit the pattern spot profile and the topological structure of the background data, simplify the earth surface coverage updating operation, ensure that no new topological problem is generated, and ensure the quality level of the updated layer.
For the convenience of understanding the embodiment, the iterative update method of high fidelity surface coverage data disclosed by the embodiment of the invention is first described in detail.
The first embodiment is as follows:
fig. 1 is a flowchart of a high-fidelity iterative earth covering data updating method according to an embodiment of the present invention.
Referring to fig. 1, the iterative update method of high fidelity surface coverage data comprises the following steps:
step S110, acquiring a ground surface coverage background data set in a background image layer;
step S120, comparing the earth surface coverage background data set with the remote sensing image data set, and obtaining a plurality of background pattern spots and a plurality of change information according to a plurality of comparison results, wherein the background pattern spots comprise change pattern spots and pattern spots which are geometrically adjacent to the change pattern spots;
step S130, extracting the plurality of change pattern spots and the plurality of geometrically adjacent pattern spots to change layers respectively;
step S140, updating the plurality of change patches in the change layer according to the plurality of change information, and obtaining a plurality of update background patches;
and S150, respectively performing element level replacement on the plurality of updated background patches and the plurality of background patches in the background image layer to obtain earth surface coverage complete set data.
Specifically, the traditional ground surface coverage updating data generally directly performs fusion updating on the changed pattern spots and the background pattern spots to further obtain updated ground surface coverage complete set data, the updating mode cannot avoid serious topological errors such as pattern spot topological gaps, pattern spot topological overlapping, illegal polygons and the like, and huge workload is increased for the later period.
Further, in the iterative update method for high-fidelity surface coverage data provided in the foregoing embodiment, step S120 may be implemented by the following steps, including:
repeatedly executing the following processing until the ground surface covering background data in the background image layer is traversed:
step S210, comparing the first ground surface coverage background data with the first remote sensing image data, and obtaining a first change pattern spot under the condition that the first comparison result is inconsistent;
step S220, obtaining first variation information according to the first comparison result, wherein the first variation information corresponds to the first variation pattern.
Specifically, according to the actual situation of the latest remote sensing image data set, finding out all change pattern spots in the earth surface coverage background data set;
further, in the iterative updating method of high fidelity surface coverage data provided in the above embodiment, step S130 may be implemented by the following steps, including:
repeatedly executing the following processing until the change pattern spots in the background layer are traversed:
step S310, extracting the first variation pattern spot and the pattern spot geometrically adjacent to the first variation pattern spot to the variation layer respectively.
The method does not extract the change pattern spot independently, but extracts the pattern spots adjacent to the change pattern spot to the change layer together, so that the change pattern spot and the pattern spots adjacent to the change pattern spot in geometry are ensured under the condition of re-editing the change pattern spot, namely the shape and the nodes of the background pattern spot are not changed, the topological problem is avoided, and the strict corresponding relation between the updated background pattern spot and the background pattern spot is ensured;
further, in the iterative update method for high-fidelity surface coverage data provided in the foregoing embodiment, step S140 may be implemented by the following steps, including:
repeatedly executing the following processing until the change patches in the change layer are traversed:
step S410, judging a first change type of a first change pattern spot in the change layer according to the first change information;
and step S420, updating the first change pattern spot according to the first change type and the first change information to obtain a first update background pattern spot.
Specifically, the change information is the image spot change information obtained by comparing the ground surface coverage background data with the remote sensing image data;
further, the change information includes one or more of the contour, center position, shape, and attribute value of the change patch.
Further, in the iterative update method for high-fidelity surface coverage data provided in the foregoing embodiment, step S420 may be implemented by the following steps, including:
step S510, when the first change pattern spot changes in a telescopic mode, cutting the first change pattern spot according to first change information, and combining the first change pattern spot to a geometrically adjacent pattern spot with the same attribute value as the first change pattern spot to obtain a first update background pattern spot;
alternatively, the first and second electrodes may be,
when the first change pattern spot has new type change, the first change pattern spot is cut out according to the first change information, the attribute value is called from the classification system, and the attribute value is endowed to the first change pattern spot to obtain a first update background pattern spot.
Here, the change types include a telescoping type change and a newborn type change;
for example, when the change pattern spot changes in a telescopic manner, as shown in fig. 2, the change pattern spot is cut out according to the change information, the original pattern spot whose attribute value is sand is changed into a grassland adjacent to the change pattern spot, the attribute value of the grassland adjacent to the change pattern spot is extracted, the change pattern spot is assigned, and the change pattern spot and the pattern spot having the same attribute value are combined, that is, combined with the grassland, so as to obtain an updated background pattern spot;
for another example, when the change pattern spot has a new type change, as shown in fig. 3, the attribute value of the change pattern spot in the middle of the grassland is newly generated as sand, the change pattern spot is cut out according to the change information, the sand attribute value is called from the classification system, and the change pattern spot is given to obtain an updated background pattern spot;
here, in the two examples of the change types, the change pattern spots are edited in the geometrically adjacent pattern spots, only two operations of pattern spot cutting and pattern spot combining are adopted, the polygon nodes are not edited again or the polygons are not collected again, and the strict corresponding relation between the updated background pattern spots and the background pattern spots is ensured;
further, in the iterative update method for high-fidelity surface coverage data provided in the foregoing embodiment, step S150 may be implemented by the following steps, including:
repeatedly executing the following processing until the updated background image spots in the change image layer are traversed:
step S610, element level replacement is carried out on the first updating background pattern spot in the change layer and the first background pattern spot in the background layer.
Here, all the updated background patches in the changed layer are correspondingly replaced with the corresponding patches in the background layer;
the embodiment of the invention provides a high-fidelity ground surface coverage data iteration updating method, which is completely based on ground surface coverage background data change pattern spots and adjacent pattern spots for data updating, ensures the strict corresponding relation between the updated background pattern spots and the background pattern spots, ensures that the updated data has the quality level completely consistent with the background data, ensures the achievement quality of ground surface coverage updating data, and can ensure the reliable quality of the updating achievement in continuous iteration updating;
in addition, the updating method strictly uses the pattern spot cutting and the pattern spot combining, does not re-edit the polygon nodes or re-collect the polygons, enables the updated pattern spots to strictly inherit the pattern spot outline and the topological structure of the background data, simplifies the data updating operation, ensures that no new topological problem is generated, does not need extra check and modification on the updated data, greatly improves the work efficiency of the ground surface coverage updating production, and can provide an efficient means for dynamically updating mass ground surface coverage data in the field of ground observation.
Example two:
fig. 4 is a schematic structural diagram of a high-fidelity iterative earth covering data updating system according to a second embodiment of the present invention.
Referring to FIG. 4, a high fidelity surface coverage data iterative update system includes:
the acquiring unit 10 is used for acquiring a ground surface coverage background data set in the background image layer;
the comparison unit 20 is used for comparing the ground surface coverage background data set with the remote sensing image data set, and obtaining a plurality of background pattern spots and a plurality of change information according to a plurality of comparison results, wherein the background pattern spots comprise change pattern spots and pattern spots which are geometrically adjacent to the change pattern spots;
an extracting unit 30, configured to extract the plurality of variation patches and the plurality of geometrically adjacent patches to a variation layer;
the updating unit 40 is configured to update the plurality of change patches in the change layer according to the plurality of change information, and obtain a plurality of update background patches;
and the replacing unit 50 is used for performing element-level replacement on the plurality of updated background patches and the plurality of background patches in the background image layer to obtain the earth surface coverage complete set data.
Further, the comparing unit 20 is further configured to repeatedly perform the following processing until the ground cover background data in the background image layer is traversed: comparing the first ground surface coverage background data with the first remote sensing image data, and obtaining a first change pattern spot under the condition that the first comparison result is inconsistent; and obtaining first change information according to the first comparison result, wherein the first change information corresponds to the first change pattern spot.
Further, the extracting unit 30 is further configured to repeatedly perform the following processing until the change patches in the background layer are traversed: and respectively extracting the first change pattern spots and pattern spots geometrically adjacent to the first change pattern spots to the change layer.
Further, the updating unit 40 is further configured to repeatedly perform the following processing until the change patches in the change layer are traversed: judging a first change type of a first change pattern spot in the change layer according to the first change information; and updating the first change pattern spot according to the first change type and the first change information to obtain a first update background pattern spot.
Further, the updating unit 40 is further configured to, when the first changing pattern spot changes in a telescopic manner, cut out the first changing pattern spot according to the first changing information, and merge the first changing pattern spot into a geometrically adjacent pattern spot having the same attribute value as the first changing pattern spot, so as to obtain a first updating background pattern spot;
alternatively, the first and second electrodes may be,
when the first change pattern spot has new type change, the first change pattern spot is cut out according to the first change information, the attribute value is called from the classification system, and the attribute value is endowed to the first change pattern spot to obtain a first update background pattern spot.
Further, the change information includes one or more of the contour, center position, shape, and attribute value of the change patch.
Further, the replacing unit 50 is further configured to repeatedly perform the following processing until the updated background patches in the change layer are traversed; and performing element-level replacement on the first updating background pattern spot in the change layer and the first background pattern spot in the background layer.
The high-fidelity ground surface coverage data iterative updating system provided by the embodiment of the invention has the same technical characteristics as the high-fidelity ground surface coverage data iterative updating method provided by the embodiment, so that the same technical problems can be solved, and the same technical effects can be achieved.
The computer program product of the method and the system for iteratively updating high-fidelity surface coverage data provided by the embodiments of the present invention includes a computer readable storage medium storing program codes, where instructions included in the program codes may be used to execute the method described in the foregoing method embodiments, and specific implementation may refer to the method embodiments, and will not be described herein again.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the system and the apparatus described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
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 computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The embodiment of the present invention further provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the steps of the high-fidelity iterative earth surface coverage data updating method provided by the above embodiments are implemented.
The embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, performs the steps of the high-fidelity surface coverage data iterative updating method of the above-mentioned embodiment.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A high-fidelity iterative earth-surface coverage data updating method is characterized by comprising the following steps:
acquiring a ground surface coverage background data set in a background image layer;
comparing the earth surface coverage background data set with the remote sensing image data set, and obtaining a plurality of background pattern spots and a plurality of change information according to a plurality of comparison results, wherein the background pattern spots comprise change pattern spots and pattern spots which are geometrically adjacent to the change pattern spots;
extracting the plurality of change pattern spots and the plurality of geometrically adjacent pattern spots to a change layer respectively;
updating the plurality of change pattern spots in the change layer according to the plurality of change information to obtain a plurality of update background pattern spots;
and respectively carrying out element level replacement on the plurality of updated background pattern spots and the plurality of background pattern spots in the background pattern layer to obtain earth surface coverage complete set data.
2. The iterative update method for high-fidelity ground surface coverage data according to claim 1, wherein the comparing the ground surface coverage background data set with the remote sensing image data set to obtain a plurality of background patches and a plurality of change information according to a plurality of comparison results, wherein the background patches including the change patches and the patches geometrically adjacent to the change patches comprises repeatedly performing the following processes until the ground surface coverage background data in the background pattern layer are traversed:
comparing the first ground surface coverage background data with the first remote sensing image data, and obtaining a first change pattern spot under the condition that the first comparison result is inconsistent;
and obtaining first change information according to the first comparison result, wherein the first change information corresponds to the first change pattern spot.
3. The method of iteratively updating high fidelity surface coverage data as claimed in claim 1, wherein said extracting a plurality of said change patches and a plurality of said geometrically neighboring patches into a change layer comprises repeatedly performing the following processes until all of said change patches in said background layer are traversed:
and respectively extracting a first change pattern spot and a pattern spot which is geometrically adjacent to the first change pattern spot to a change layer.
4. The iterative update method for high-fidelity surface coverage data according to claim 1, wherein the updating the plurality of change patches in the change layer according to the plurality of change information and obtaining a plurality of update background patches comprises repeatedly performing the following processes until all the change patches in the change layer are traversed:
judging a first change type of a first change pattern spot in the change layer according to first change information;
and updating the first change pattern spot according to the first change type and the first change information to obtain a first update background pattern spot.
5. The iterative update method for high-fidelity surface coverage data according to claim 4, wherein the updating the first change patch according to the first change type and the first change information to obtain a first update background patch comprises:
when the first change pattern spot is changed in a telescopic mode, cutting the first change pattern spot according to the first change information, and combining the first change pattern spot to a geometrically adjacent pattern spot with the same attribute value as the first change pattern spot to obtain a first update background pattern spot;
alternatively, the first and second electrodes may be,
and when the first change pattern spot has new type change, cutting the first change pattern spot according to the first change information, calling an attribute value from a classification system, and endowing the attribute value to the first change pattern spot to obtain the first update background pattern spot.
6. The iterative update method for high-fidelity surface coverage data as claimed in claim 1, wherein the change information comprises one or more of the contour, center position, shape and attribute value of the change patch.
7. The iterative update method for high-fidelity ground-cover data according to claim 1, wherein the performing element-level replacement on the plurality of updated background patches and the plurality of background patches in the background image layer respectively to obtain the ground-cover corpus data comprises repeatedly performing the following processes until all the updated background patches in the changed image layer are traversed:
and performing element-level replacement on the first updated background pattern spot in the change layer and the first background pattern spot in the background layer.
8. A high fidelity iterative surface coverage data update system, comprising:
the acquisition unit is used for acquiring a ground surface coverage background data set in the background image layer;
the comparison unit is used for comparing the earth surface coverage background data set with the remote sensing image data set, and obtaining a plurality of background pattern spots and a plurality of change information according to a plurality of comparison results, wherein the background pattern spots comprise change pattern spots and pattern spots which are geometrically adjacent to the change pattern spots;
the extraction unit is used for extracting the plurality of change pattern spots and the plurality of geometrically adjacent pattern spots to a change layer;
the updating unit is used for updating the plurality of change pattern spots in the change layer according to the plurality of change information and obtaining a plurality of update background pattern spots;
and the replacing unit is used for performing element-level replacement on the plurality of updated background patches and the plurality of background patches in the background image layer to obtain earth surface coverage complete set data.
9. The system of claim 8, wherein the updating unit is further configured to repeat the following until the change patches in the change layer are traversed:
judging a first change type of a first change pattern spot in the change layer according to first change information;
and updating the first change pattern spot according to the first change type and the first change information to obtain a first update background pattern spot.
10. The iterative update system for high-fidelity surface coverage data according to claim 9, wherein the update unit is further configured to, when the first change pattern spot changes in a telescopic manner, crop the first change pattern spot according to the first change information, and merge the first change pattern spot into a geometrically neighboring pattern spot having the same attribute value as the first change pattern spot, so as to obtain a first update background pattern spot;
alternatively, the first and second electrodes may be,
and when the first change pattern spot has new type change, cutting the first change pattern spot according to the first change information, calling an attribute value from a classification system, and endowing the attribute value to the first change pattern spot to obtain a first update background pattern spot.
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