CN107833278B - Terrain simulation method and device and electronic equipment - Google Patents
Terrain simulation method and device and electronic equipment Download PDFInfo
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Abstract
The embodiment of the invention provides a terrain simulation method, a terrain simulation device and electronic equipment, and relates to the technical field of surveying and mapping, wherein the method comprises the following steps: acquiring topographic data of a target area; establishing a first curved surface model of the target area according to the topographic data; correcting the first surface model using the stereopair data to obtain a second surface model; and modifying the second curved surface model to obtain a terrain model. The method can obtain the terrain model of the target area more efficiently, and is easy to modify and higher in precision.
Description
Technical Field
The invention relates to the technical field of surveying and mapping, in particular to a terrain simulation method and device and electronic equipment.
Background
With the rapid development of computer technology and information technology, the spatial information platform gradually develops from two dimensions to three dimensions. The three-dimensional data table can express the real world more visually and truly, and is favorable for application of basic mapping data in different fields such as geological disasters, city planning, homeland management, smart cities and the like. Therefore, the three-dimensional database is a trend of various geographic information platforms, and the three-dimensional modeling method is diversified more and more.
The current methods for terrain simulation of a target area mainly include: the method has the advantages that firstly, the three-dimensional modeling is realized through the three-dimensional data processing platform by utilizing the existing DEM data and DOM data, the method has the advantages of high automation degree and high modeling speed, but the obtained DEM data is final data and has the defect of unreasonable performance on complex terrains, and meanwhile, the DEM data is inconvenient to modify and has poor manual intervention; and secondly, 3ds Max Design is adopted for modeling, which has the advantages of fine modeling and good detail performance, but simultaneously, the data volume is large, time and labor are consumed, and the efficiency is low.
Disclosure of Invention
The invention aims to provide a terrain simulation method, a terrain simulation device and electronic equipment, which can more efficiently obtain a terrain model of a target area, are easy to modify and have higher precision.
In order to achieve the above purpose, the embodiment of the present invention adopts the following technical solutions:
in a first aspect, the present invention provides a terrain simulation method, the method comprising: acquiring topographic data of a target area; establishing a first curved surface model of the target area according to the topographic data; correcting the first surface model using stereopair data to obtain a second surface model; and modifying the second curved surface model to obtain a terrain model.
In a second aspect, the present invention provides a terrain simulation apparatus, the apparatus comprising: the data acquisition module is used for acquiring topographic data of the target area; the generation module is used for establishing a first curved surface model of the target area according to the topographic data; the correction module is used for correcting the first curved surface model by utilizing stereopair data to obtain a second curved surface model; and the modification module is used for modifying the second curved surface model to obtain a terrain model.
In a third aspect, the present invention provides an electronic device, comprising: a memory, a processor, and a terrain simulation device stored in the memory and including at least one software function module executed by the processor, the terrain simulation device comprising: the data acquisition module is used for acquiring topographic data of the target area; the generation module is used for establishing a first curved surface model of the target area according to the topographic data; the correction module is used for correcting the first curved surface model by utilizing stereopair data to obtain a second curved surface model; and the modification module is used for modifying the second curved surface model to obtain a terrain model.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
according to the terrain simulation method, the terrain simulation device and the electronic equipment, the editable terrain model of the target area is established, the terrain model is modified and corrected by combining the stereopair data of the target area, and the accuracy of the terrain model of the target area can be improved.
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 technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 shows a flow chart of a terrain simulation method provided by a first embodiment of the present invention;
fig. 2 shows a flow chart of sub-steps of step S100 shown in fig. 1;
FIG. 3 shows a flow chart of sub-steps of step S300 shown in FIG. 1;
FIG. 4 shows a flow chart of sub-steps of step S500 shown in FIG. 1;
FIG. 5 shows a flow chart of sub-steps of step S700 shown in FIG. 1;
fig. 6 shows a block schematic diagram of an electronic device provided by a second embodiment of the invention;
FIG. 7 is a functional block diagram of a terrain simulator provided in accordance with a third embodiment of the present invention;
FIG. 8 shows a schematic block diagram of the correction module of FIG. 7;
FIG. 9 is a schematic block diagram of the correction unit of FIG. 8;
fig. 10 is a schematic block diagram of the modification module of fig. 7.
In the figure: 10-an electronic device; 100-a memory; 200-a memory controller; 300-a processor; 50-a terrain simulation device; 500-a data acquisition module; 600-a generation module; 700-a correction module; 710-an encryption unit; 720-a comparison unit; 730-a correction unit; 731-data add and delete subunit; 732-Z value correction subunit; 800-a modification module; 810-a differential correction unit; 820-a modifying unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the 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.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
The first embodiment:
referring to fig. 1, fig. 1 is a flowchart of a terrain simulation method according to a first embodiment of the invention. The terrain simulation method may include the steps of:
s100, acquiring topographic data of the target area.
In this embodiment, the target area includes a target work area, and in general, in order to ensure that the final result can represent the terrain of all areas of the target work area, the target area may be larger than the target work area, as long as it is ensured that the range of the target work area falls within the range of the target area. The topographic data may include DEM (digital elevation Model) data of the target area, image control point data, and image data of the target area, wherein the DEM data may be used to construct a topographic Model of the target area, the image control point data may be used to correct the topographic Model, and the image data may include a plurality of high-precision image photographs of the target area obtained by aerial photography.
S300, establishing a first curved surface model of the target area according to the topographic data.
In this embodiment, a first surface model of the target area is established according to the terrain data, where the first surface model may include image control points, and the first surface model is corrected by combining the image control points with the image control points.
S500, the first surface model is corrected by utilizing the stereopair data to obtain a second surface model.
In this embodiment, since the first surface model is obtained by surface modeling based on the terrain data, although the first surface model is corrected by the image control point data, the first surface model can only approximately describe the real terrain of the target area, and there are many different areas from the real terrain, which requires accurate correction.
And stereopair data passes through professional mapping software under stereotactic environment the topography data is right the target area carries out stereopair visual angle's observation, it can make the technical staff stand and observe the angle of aircraft when sailing the target area, what technical staff observed this moment is the target area true topography to this comes the contrast and rectifies first curved surface model, compare in the second curved surface model that first curved surface model accords with more the target area true topography.
S700, modifying the second curved surface model to obtain a terrain model.
In this embodiment, since the second surface model obtained in step S500 is a white model representing the target area through surface modeling and correction, the second surface model needs to be modified to obtain a terrain model closer to the real terrain of the target area.
Based on the above design, the method for simulating terrain provided by this embodiment modifies and corrects the terrain model of the target area by combining the stereopair data of the target area, so as to improve the accuracy of the terrain model.
Referring to fig. 2, fig. 2 is a flowchart illustrating sub-steps of step S100 shown in fig. 1. In this embodiment, as an implementation manner, the step S100 may further include the following sub-steps:
and S110, laying a basic control network according to the target area.
In this embodiment, a basic control network conforming to the target area needs to be deployed according to the topography of the target area, where the basic control network may include a plurality of control points. More specifically, the basic control network should meet the basic control network deployment requirements specified by the national mapping standards.
As an embodiment, the control point may be obtained by a national standard measurement control point.
Meanwhile, in some other embodiments of the present invention, the coordinate data of the control point may also be obtained by a GPS static measurement technology, as long as the coordinate precision of the control point is ensured to meet the precision requirement in the topographic survey.
And S120, determining a plurality of image control points according to the plurality of control points.
In this embodiment, the image control points are control points for controlling aerial image data in the field of aerial surveying and mapping, and may be reasonably arranged according to the actual terrain condition of the target area on the basis of the control points of the basic control network.
It should be noted that the data of the control points may also be used as the image control point data.
S130, measuring the image control points to obtain image control point data.
In this embodiment, the image control point data may include coordinate data of a plurality of image control points of the target area, which may be obtained by establishing a control point-based coordinate system on the basis of the control points of the basic control network, and then by GPS measurement.
And S140, acquiring image data acquired by external equipment to generate DEM data.
In this embodiment, the image data may be obtained by an unmanned aerial vehicle flying through the target area, and simultaneously acquiring the image data of the target area, where the image data may include a plurality of high-precision image photos of the target area, and the image data should include a plurality of high-precision image photos of the image control points.
In the present embodiment, the image data may be analyzed by using mapping software such as Microsation V8 and coal maps to obtain the DEM data, and at the same time, contour data, elevation data, and feature line data of the target area may be obtained, where a feature line is a linear element representing the topography of the target area, and may include elements such as a steep sill of the target area, a top sill of a slope, a border line of a hardened surface road, and a water line of a water-based river.
Referring to fig. 3, fig. 3 is a flowchart illustrating sub-steps of step S300 shown in fig. 1. In this embodiment, step S300 may further include the following sub-steps:
s310, importing DEM data into AutoCAD Civil3D to establish a basic surface model of the target area.
In this embodiment, in order to quickly establish a basic curved surface model and ensure that the basic curved surface model can be corrected for many times at a later stage, the DEM data may be imported into the AutoCAD Civil3D to establish the basic curved surface model of the target region, and the establishment of the curved surface model by the AutoCAD Civil3D has the characteristics of quickness, flexibility and easy change, and can meet the requirement of establishing the basic curved surface model in the terrain simulation method provided in this embodiment.
S320, importing the image control point data into the basic surface model in AutoCAD Civil3D to obtain a first surface model
In this embodiment, the basic curved surface model established in step S310 is based on image data aerial-measured by an unmanned aerial vehicle, and because the image data does not include a control point, the image control point data needs to be introduced to correct the basic curved surface model to obtain a first curved surface model more substantially conforming to real terrain data.
Meanwhile, as an implementation manner, contour line data and elevation data acquired in the step S130 may be introduced to perfect in the process of correcting the basic curved surface model, and the feature line data may be introduced to refine, so that the obtained first curved surface model is closer to the real terrain.
Based on the above design, the terrain simulation method provided by this embodiment performs terrain simulation on the target area in combination with AutoCAD Civil3D, so that the speed is high, and the obtained terrain model can be edited and modified, so that the terrain model can be further improved, and the terrain model is closer to the real terrain.
Referring to fig. 4, fig. 4 is a flowchart illustrating sub-steps of step S500 shown in fig. 1. In this embodiment, step S500 may further include the following sub-steps:
and S510, processing image data acquired by external equipment through space-three encryption to obtain stereopair data.
Because stereopair data are obtained by observing the target area in a three-dimensional environment through professional mapping software, technicians can observe the real terrain of the target area from the visual angle of the unmanned aerial vehicle during aerial survey. In this embodiment, the basis of model modification is that a technician can obtain stereopair data of real terrain without actually measuring a target area, and in order to ensure that the real terrain observed by the technician meets the accuracy requirement, the image data needs to be encrypted in a space-three way mode first, and then the stereopair data is obtained through the image data subjected to the space-three encryption.
S520, comparing the stereopair data with the first curved surface model to obtain a difference region corresponding to the stereopair data in the first curved surface model.
After the first curved surface model is corrected by the image control point data, it can reflect the rough terrain of the target area, so in this embodiment, it is only necessary to compare the stereopair data with the first curved surface model to determine a difference area in the first curved surface model, where the stereopair data is different from the stereopair data, and then correct the difference area, so that a terrain model closer to the real terrain can be obtained.
S530, the difference region is corrected in the first surface model to obtain a second surface model.
After determining the area of difference between the first curved surface model and the real terrain, the difference area needs to be modified for multiple times to obtain a second curved surface model until the second curved surface model is closer to the real terrain by comparing with the stereopair data.
Preferably, as an embodiment, the manner of modifying the difference region may include: for a sheltered area in a building dense area, collecting a characteristic line of the area according to the terrain around the area, wherein a plane characteristic can be collected in a plane area, and a slope characteristic can be collected in a slope area; for the areas with excessively dense contour lines, technicians can manually increase the on-line and off-line of the steep bank and delete part of the excessively dense contour lines; for areas with completely consistent elevations, such as horizontal squares, unified assignment can be carried out on the elevations of the areas.
Based on the above design, the method for simulating terrain provided by this embodiment modifies and corrects the terrain model of the target area in combination with the stereopair data of the target area, so that the terrain model can be closer to the real terrain, and the accuracy of the terrain model is improved.
Referring to fig. 5, fig. 5 is a flowchart illustrating sub-steps of step S700 shown in fig. 1. In this embodiment, step S700 may further include the following sub-steps:
and S710, processing the DEM data by adopting differential correction to obtain DOM data.
The second surface model obtained by the above steps is a white model used for representing the target area and modeled and corrected by a technician through a surface, and therefore, the second surface model needs to be modified to obtain a terrain model closer to the real terrain of the target area.
In this embodiment, the second surface model is modified based on DOM (Digital ortho Map) data of the target region, and therefore, before the second surface model is modified, the DEM data may be processed by differential correction to obtain DOM data of the target region.
S720, modifying the second surface model by adopting 3ds Max Design and combining DOM data to obtain a terrain model.
In this embodiment, 3ds Max Design may be used to modify the second surface model. In 3ds Max Design, DOM data may be attached as a texture map to the second surface model to obtain the terrain model, with the associated functionality provided by the Dynamite VSP plugin.
Meanwhile, in some other embodiments of the invention, the established curved surface model can be reclassified, and the established terrain is modified by using materials in the texture material library to obtain the terrain model; and after the model is modified, light rays can be added to render the scene, so that the truest three-dimensional live-action reproduction is realized.
Based on the above design, the terrain simulation method provided by this embodiment is capable of improving the accuracy of the terrain model of the target area by quickly establishing the editable terrain model of the target area in AutoCAD Civil3D and modifying and correcting the terrain model by combining the stereopair data of the target area, so that the terrain model is closer to the real terrain.
Second embodiment:
referring to fig. 6, fig. 6 is a block diagram illustrating an electronic device 10 according to a second embodiment of the invention. The electronic device 10 may be, but is not limited to, a Personal Computer (PC), a tablet PC, a laptop portable computer, a car computer, a Personal Digital Assistant (PDA), a wearable mobile terminal, and the like. The electronic device 10 may include a terrain simulator 50, a memory 100, a memory controller 200, and a processor 300.
The elements of the memory 100, the memory controller 200, and the processor 300 may be electrically connected to each other directly or indirectly to achieve data transmission or interaction. For example, the components may be electrically connected to each other via one or more communication buses or signal lines. The terrain simulation apparatus 50 may include at least one software function module that may be stored in the memory 100 in the form of software or firmware (firmware) or solidified in an Operating System (OS) of the electronic device 10. The processor 300 may be adapted to execute executable modules stored in the memory 100, such as software functional modules or computer programs comprised by the terrain simulation apparatus 50.
The Memory 100 may be, but is not limited to, a Random Access Memory (RAM), a Read Only Memory (ROM), a Programmable Read-Only Memory (PROM), an Erasable Read-Only Memory (EPROM), an electrically Erasable Read-Only Memory (EEPROM), and the like. The memory 100 may be used for storing a program, the processor 300 may execute the program after receiving an execution instruction, and the method performed by the server defined by the flow disclosed in any embodiment of the present invention may be applied to the processor 300, or implemented by the processor 300.
The processor 300 may be an integrated circuit chip having signal processing capabilities. The Processor 300 may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), a voice Processor, a video Processor, and the like; but may also be a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor 300 may be any conventional processor or the like.
The third embodiment:
referring to fig. 7, fig. 7 is a block diagram illustrating a terrain simulation apparatus 50 according to a third embodiment of the present invention. In this embodiment, the terrain simulation apparatus 50 may include a data acquisition module 500, a generation module 600, a modification module 700, and a modification module 800.
The data obtaining module 500 is configured to obtain topographic data of a target area, where the topographic data includes DEM data and image control point data of the target area.
In this embodiment, the data acquiring module 500 may be configured to execute step S100.
The generating module 600 is configured to establish a first surface model of the target area according to the terrain data.
In this embodiment, the generating module 600 may be configured to execute step S300.
The modification module 700 is configured to correct the first surface model using the stereopair data to obtain a second surface model.
In this embodiment, the modification module 700 may be configured to execute step S500.
The modifying module 800 is configured to modify the second surface model to obtain a terrain model.
In this embodiment, the modification module 800 may be configured to perform step S700.
Referring to fig. 8, fig. 8 is a block diagram illustrating a structure of the modification module 700 in fig. 7. In this embodiment, the modification module 700 may include an encryption unit 710, a comparison unit 720 and a modification unit 730.
The encryption unit 710 is configured to process the image data through space-three encryption to obtain the stereopair data.
In this embodiment, the encryption unit 710 may be configured to perform step S510.
The comparing unit 720 is configured to compare the stereopair data with the first curved surface model, and obtain a difference region in the first curved surface model relative to the stereopair data.
In this embodiment, the comparing unit 720 may be configured to execute step S520.
The modifying unit 730 is configured to modify the difference region in the first surface model to obtain the second surface model.
In this embodiment, the correcting unit 730 may be configured to execute step S530.
Referring to fig. 9, fig. 9 is a block diagram illustrating a structure of the correction unit 730 in fig. 8. In this embodiment, the correcting unit 730 may include a data adding and deleting subunit 731 and a Z value correcting subunit 732.
In this embodiment, the data adding and deleting subunit 731 is configured to add or delete DEM data of the difference area according to the stereo pair data.
In this embodiment, the Z value correcting subunit 732 is configured to correct Z value data of the disparity region according to the stereopair data.
Referring to fig. 10, fig. 10 is a block diagram illustrating a structure of the modification module 800 in fig. 7. In this embodiment, the modification module 800 may include a differential correction unit 810 and a modification unit 820.
The differential correction unit 810 is configured to process the DEM data to obtain DOM data.
In this embodiment, the differential correction unit 810 may be configured to perform step S710.
The modifying unit 820 is configured to modify the second surface model in combination with the DOM data to obtain the terrain model.
In this embodiment, the modifying unit 820 may be configured to perform step S720.
In summary, the terrain simulation method, apparatus, and electronic device provided in the embodiments of the present invention establish a terrain model that can be edited in a target area quickly in AutoCAD Civil3D, and optimize the terrain model by combining with elements such as contour lines, elevation points, and feature lines of the target area; modifying and correcting the terrain model by combining the stereopair data of the target area, so that the terrain model is closer to the real terrain of the target area, and the accuracy of the terrain model of the target area is improved; the terrain model is further modified in the 3ds Max Design, so that the terrain model is more consistent with the real three-dimensional real scene of the target area.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, the functional modules in the embodiments of the present invention may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules 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.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (8)
1. A terrain simulation method, the method comprising:
acquiring topographic data of a target area;
establishing a first curved surface model of the target area according to the topographic data;
correcting the first surface model using stereopair data to obtain a second surface model;
modifying the second curved surface model to obtain a terrain model;
wherein the terrain data comprises DEM data of the target area, and the step of using stereopair data to correct the first surface model to obtain a second surface model comprises:
processing image data acquired by external equipment through space-three encryption to obtain stereopair data;
comparing the stereopair data with the first curved surface model to obtain a difference region in the first curved surface model relative to the stereopair data;
modifying the difference region in the first surface model to obtain the second surface model.
2. The terrain simulation method of claim 1, wherein the terrain data comprises DEM data, image control point data, of the target area, and the step of obtaining the terrain data of the target area comprises:
laying a basic control network according to the target area, wherein the basic control network comprises a plurality of control points;
determining a plurality of image control points according to the plurality of control points;
measuring a plurality of image control points to obtain the image control point data;
and acquiring image data acquired by external equipment, and generating the DEM data.
3. The terrain simulation method of claim 1, wherein the terrain data comprises DEM data, image control point data, and the step of building a first surface model of the target area based on the terrain data comprises:
importing the DEM data into AutoCAD Civil3D to establish a basic surface model of the target area;
and importing the image control point data into the basic surface model in AutoCAD Civil3D to obtain the first surface model.
4. The terrain simulation method of claim 1, wherein said step of modifying said difference region in said first surface model to obtain said second surface model comprises:
according to the stereopair data, adding or deleting DEM data of the difference area;
and correcting Z value data of the difference region according to the stereopair data.
5. The terrain simulation method of claim 1, wherein the step of modifying the second surface model to obtain a terrain model comprises:
processing the DEM data by adopting differential correction to obtain DOM data;
and modifying the second curved surface model by adopting 3ds Max Design and combining the DOM data to obtain the terrain model.
6. A terrain simulation apparatus, comprising:
the data acquisition module is used for acquiring topographic data of the target area;
the generation module is used for establishing a first curved surface model of the target area according to the topographic data;
the correction module is used for correcting the first curved surface model by utilizing stereopair data to obtain a second curved surface model;
the modification module is used for modifying the second curved surface model to obtain a terrain model;
wherein the terrain data comprises DEM data of the target area, and the correction module comprises:
the encryption unit is used for processing image data acquired by external equipment through space-time-space-three encryption to obtain stereopair data;
a comparison unit, configured to compare the stereopair data with the first curved surface model, and obtain a difference region in the first curved surface model with respect to the stereopair data;
a correction unit for correcting the difference region in the first surface model to obtain the second surface model.
7. The terrain simulator of claim 6, wherein said correction unit comprises:
the data adding and deleting subunit is used for adding or deleting DEM data of the difference area according to the stereopair data;
and the Z value correction subunit is used for correcting the Z value data of the difference region according to the stereopair data.
8. An electronic device, comprising:
a memory;
a processor; and
a terrain simulation device stored in the memory and including at least one software function module executed by the processor, the terrain simulation device comprising:
the data acquisition module is used for acquiring topographic data of the target area;
the generation module is used for establishing a first curved surface model of the target area according to the topographic data;
the correction module is used for correcting the first curved surface model by utilizing stereopair data to obtain a second curved surface model;
the modification module is used for modifying the second curved surface model to obtain a terrain model;
wherein the terrain data comprises DEM data of the target area, and the correction module comprises:
the encryption unit is used for processing image data acquired by external equipment through space-time-space-three encryption to obtain stereopair data;
a comparison unit, configured to compare the stereopair data with the first curved surface model, and obtain a difference region in the first curved surface model with respect to the stereopair data;
a correction unit for correcting the difference region in the first surface model to obtain the second surface model.
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| CN201711008320.1A CN107833278B (en) | 2017-10-25 | 2017-10-25 | Terrain simulation method and device and electronic equipment |
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