A terrain data acquisition method, system and intelligent terminal

Abstract

The application relates to the field of terrain monitoring, in particular to a terrain data acquisition method and system and an intelligent terminal, which comprises the following steps: obtaining user positioning information of a user to determine a corresponding target terrain area position and elevation information where the user is located; in response to a data collection operation on the target terrain area position and the elevation information, obtaining a corresponding overall digital terrain model according to the target terrain area position and the elevation information, and obtaining overall terrain information corresponding to the overall digital terrain model; in response to an imaging operation of a local terrain by a double camera of a device worn by the user, obtaining a local terrain model; comparing the local terrain model and the overall digital terrain model to obtain a target digital terrain model corresponding to the local terrain model in the overall digital terrain model; and projecting corresponding target terrain information obtained according to the target digital terrain model to the local terrain model. The application has the effect of conveniently obtaining relevant terrain data of a local terrain.

Description

Technical Field

[0001] This application relates to the field of terrain monitoring, and in particular to a method, system, and intelligent terminal for acquiring terrain data. Background Technology

[0002] Currently, landslides occur intermittently in some mountainous areas. Once a landslide occurs, it is highly likely to damage nearby buildings and residents. In order to reduce losses and safety hazards, it is necessary to monitor some terrains with landslide risks. Therefore, some sensors or measuring devices are installed to monitor some terrains, and then the collected data is transmitted to a cloud server. The data includes geological history maps of the terrain and parameters such as the slope of the terrain. In addition, to facilitate the understanding of terrain data, DEM technology can be used to obtain a digital terrain model of the terrain, and the geological history map, slope and other parameters can be labeled.

[0003] Sometimes monitoring personnel (users) conduct on-site inspections. During these inspections, it is necessary to retrieve and present the terrain-related data observed by the monitoring personnel. However, the terrain that can be seen during the inspection is only a local terrain. When retrieving the data terrain model, the overall digital terrain model of the terrain is usually retrieved, making it impossible to directly understand the local data. This situation needs further improvement. Summary of the Invention

[0004] To facilitate the acquisition of relevant terrain data for local terrain, this application provides a method for acquiring terrain data.

[0005] This application provides a method for acquiring terrain data, which employs the following technical solution:

[0006] A method for acquiring terrain data includes the following steps:

[0007] Obtain the user's location information to determine the location and elevation information of the target terrain area corresponding to the user;

[0008] In response to the data acquisition operation of the target terrain area's location and elevation information, the corresponding overall digital terrain model is obtained based on the target terrain area's location and elevation information, and the overall terrain information corresponding to the overall digital terrain model is also obtained.

[0009] In response to the imaging operation of the dual cameras on the user's wearing device on the local terrain, a local terrain model is obtained;

[0010] By comparing the local terrain model and the overall digital terrain model, the target digital terrain model corresponding to the local terrain model in the overall digital terrain model is obtained;

[0011] Obtain the corresponding target terrain information based on the target digital terrain model and project it onto the local terrain model.

[0012] By adopting the above technical solution, when monitoring personnel (users) conduct on-site monitoring of the terrain, the user's location information is first obtained in real time. Based on the user's location, the location and elevation information of the target terrain area to be monitored are obtained. After determining the location of the target terrain area, the corresponding overall digital terrain model and corresponding overall terrain information can be retrieved based on the location and elevation information of the target terrain area. The overall terrain information corresponds to each local area of ​​the overall digital terrain model. The overall digital terrain model corresponding to each target terrain area location is pre-built and stored using a DEM. The overall terrain information is obtained through acquisition devices and sensors pre-installed at the target terrain area location. In addition to data collection, the user-worn device features dual cameras with 3D imaging capabilities. These cameras can be used to create images of local terrain areas captured by the two cameras, obtaining a local terrain model. After obtaining the local terrain model, it is compared with the overall digital terrain model to obtain the target terrain model corresponding to the local terrain model within the overall digital terrain model. Then, the target terrain information corresponding to the target terrain model is retrieved from the overall terrain information and projected onto the local terrain model formed by the dual cameras. This allows for the real-time transmission of local terrain information captured by the dual cameras to the formed local terrain model, thus enabling the acquisition of relevant local terrain data.

[0013] Optionally, when acquiring the target digital terrain model, the following may also be included:

[0014] Obtain overall planar image information corresponding to the overall digital terrain model;

[0015] Obtain local planar image information corresponding to the local terrain model;

[0016] The local planar image information is compared with the overall planar image information to obtain the target planar image information corresponding to the overall planar image information;

[0017] Obtain the corresponding target digital terrain model based on the target planar image information.

[0018] By adopting the above technical solution, in the stage of acquiring the target digital terrain model, the overall planar image information corresponding to the overall digital terrain model is first acquired, and the overall planar image information can be acquired before acquiring the target digital terrain model. At the same time as acquiring the local terrain model, the local planar image information corresponding to the local terrain model is acquired. Then, the local planar image is matched with the overall planar image information to obtain the target image information that matches the local planar image in the overall planar image information. Subsequently, the target digital terrain model corresponding to the target image information in the overall digital terrain model is retrieved, thereby realizing the acquisition of the target digital terrain model.

[0019] Optionally, the process of acquiring target planar image information also includes:

[0020] The feature point data in the overall planar image information is obtained and marked as the first feature point data, wherein one first feature point data corresponds to a local area of ​​the terrain;

[0021] Acquire feature point data within the local planar image information and label them as second feature point data;

[0022] By comparing the second feature point data and the first feature point data, the first feature point data that matches the second feature point data within the overall planar image information is obtained and defined as the target feature point data;

[0023] The target planar image information is determined based on the target feature point data.

[0024] By adopting the above technical solution, multiple feature point locations are pre-set in the target terrain area, with each feature point spaced apart and labeled differently. Each feature point represents a local area within the target terrain area. After acquiring the overall planar image information, all feature point data within the area are acquired and marked as first feature point data. Additionally, during the acquisition of local planar image information, feature point data within the local planar image information is acquired. When the number of feature point data is one, it is marked as second feature point data. Then, the second feature point data is compared with all the first feature point data to determine the target feature point data. Based on the target feature point data, the target planar image information within the overall planar image information can be determined.

[0025] Optionally, the process of acquiring target planar image information also includes:

[0026] All feature point data within the overall planar image information are acquired and labeled as the first feature point data set, wherein each feature point data is different and corresponds to a different local region;

[0027] Obtain all feature point data within the local planar image information and label them as the second feature point data set;

[0028] Compare all the second feature point data sets with the first feature point data sets, obtain all the first feature point data sets that match the second feature point data sets within the overall planar image information, and define them as the target feature point data set;

[0029] The target planar image information is determined based on the complete set of target feature point data.

[0030] By adopting the above technical solution, multiple feature point locations are pre-set in the target terrain area, with each feature point spaced apart and labeled differently. Each feature point represents a local area within the target terrain area. After acquiring the overall planar image information, all feature point data within the area are acquired and marked as the first feature point data set. Furthermore, in acquiring the local planar image information, feature point data within the local planar image information is acquired. When there are multiple feature point data, they are marked as the second feature point data set. Then, each second feature point data in the second feature point data set is sequentially compared with all the first feature point data. By determining the target feature point data one by one, the set of multiple target planar image information within the overall planar image information can be determined based on the multiple target feature point data.

[0031] Optionally, after obtaining the user's location information, the following steps are also included:

[0032] Obtain the location information of the target closest to the user's location information, where each target location information corresponds to the location and elevation information of a target terrain area;

[0033] Obtain the target distance data between the nearest target location information and the user location information, and compare the target distance data with preset distance data to determine the location and elevation information of the target terrain area.

[0034] By adopting the above technical solution, there may be multiple landslide-prone terrains in a region. After obtaining the user's location information, it is necessary to first obtain the distance between the user and the nearby terrain, determine the location information of the target closest to the user, thereby determining the target terrain to be monitored, and retrieve the location and elevation information of the corresponding target terrain area. Then, determine the target distance data between the user's location information and the target location information, and compare the target distance data with the preset distance parameter. If the target distance data is less than the preset distance parameter, the location and elevation information of the target terrain area can be determined.

[0035] Optionally, when acquiring a local terrain model, the following steps are also included:

[0036] In response to the wearable device's distance test of the target terrain, the actual distance information is obtained and compared with the preset imaging distance information. If the actual distance information is greater than the imaging distance information, no imaging operation is performed; otherwise, imaging operation is performed.

[0037] By adopting the above technical solution, after determining the location and elevation information of the target terrain area, the user moves towards the target terrain. The user's wearing device will obtain the actual distance information between the user and the target terrain in real time and compare the actual distance information with the preset imaging distance information. If the actual distance information is greater than the imaging distance information, no imaging operation will be performed. As the user continues to walk towards the target terrain, the imaging operation will be performed when the actual distance information is less than the imaging distance information.

[0038] This application provides a terrain data acquisition system, which adopts the following technical solution:

[0039] A terrain data acquisition system includes a positioning module, a location determination module, an overall model acquisition module, an overall information acquisition module, a local model acquisition module, a control module, a storage module, and an information transmission module.

[0040] The positioning module is used to acquire and output the user's location information.

[0041] The location determination module is connected to the positioning module, receives user location information and determines the location and elevation information of the target terrain area to be investigated in the user's area, and stores it in the storage module.

[0042] The overall information acquisition module is connected to the positioning module and the location determination module, receives user positioning information and acquires overall terrain information, and stores it in the storage module;

[0043] The overall model acquisition module is connected to the location determination module. It acquires an overall digital terrain model based on the location and elevation information of the target terrain area and stores it in the storage module.

[0044] The local model acquisition module uses the dual cameras of the user's wearing device to image the local terrain, acquire the corresponding local terrain model, and store it in the storage module.

[0045] The control module is connected to the overall model acquisition module and the local model acquisition module. It compares the local terrain model and the overall digital terrain model and outputs the target digital terrain model in the overall digital terrain model that corresponds to the local terrain model.

[0046] The storage module, connected to the location determination module, the overall information acquisition module, the overall model acquisition module, and the local model acquisition module, is used to store data.

[0047] The information transmission module is connected to the control module, outputs the corresponding target terrain information based on the target digital terrain model, and transmits the target terrain information to the local terrain model.

[0048] By adopting the above technical solution, when monitoring personnel (users) conduct on-site monitoring of the monitored terrain, the positioning module can obtain the user's location information in real time. The location determination module obtains the location and elevation information of the target terrain area to be monitored based on the user's location. After determining the location of the target terrain area, the overall model acquisition module can retrieve the corresponding overall digital terrain model and corresponding overall terrain information based on the target terrain area location and elevation information. The overall terrain information corresponds to each local area of ​​the overall digital terrain model. The overall digital terrain model corresponding to each target terrain area location is pre-built using a DEM and stored in the storage module. The overall terrain information is obtained through pre-installation... Data acquisition devices and sensors installed at the target terrain area collect data. During monitoring, the local model acquisition module can acquire local terrain models in real time. After acquiring the local terrain model, the control module compares the local terrain model with the overall digital terrain model to obtain the target terrain model corresponding to the local terrain model in the overall digital terrain model. Then, the information transmission module retrieves the target terrain information corresponding to the target terrain model from the overall terrain information and projects the target terrain information onto the local terrain model formed by the local model acquisition module. This enables the local terrain information of the local model acquisition module to be transmitted to the formed local terrain model in real time, thus acquiring relevant terrain data of the local terrain.

[0049] Optionally, it may also include a global image acquisition module and a local image acquisition module;

[0050] The overall image acquisition module is connected to the storage module and is used to acquire overall planar image information corresponding to the overall digital terrain model, wherein the overall planar image information is acquired in advance and stored in the storage module;

[0051] The local image acquisition module is connected to the storage module and is used to acquire local planar image information corresponding to the local terrain model. The local planar image information is acquired and updated in real time and stored in the storage module.

[0052] The control module, connected to the overall image acquisition module, the local image acquisition module, and the storage module, compares the local planar image information with the overall planar image information to determine the target planar image information, and acquires the corresponding target digital terrain model based on the target planar image information.

[0053] By adopting the above technical solution, in the stage of acquiring the target digital terrain model, the overall image acquisition module first acquires the overall planar image information corresponding to the overall digital terrain model, and the overall planar image information can be acquired before acquiring the target digital terrain model. The local image acquisition module acquires the local planar image information corresponding to the local terrain model at the same time as acquiring the local terrain model. Then, the control module matches the local planar image with the overall planar image information to acquire the target image information that matches the local planar image in the overall planar image information. Subsequently, the target digital terrain model corresponding to the target image information is retrieved from the overall digital terrain model, thereby realizing the acquisition of the target digital terrain model.

[0054] This application provides a smart terminal, including a memory and a processor, wherein the memory stores a computer program that can be loaded and executed by the processor, such as a terrain data acquisition method.

[0055] In summary, this application includes at least one of the following beneficial technical effects:

[0056] When monitoring personnel (users) conduct on-site monitoring of the terrain, the user's location information is first acquired in real time. Based on the user's location, the location and elevation information of the target terrain area to be monitored are obtained. After determining the location of the target terrain area, the corresponding overall digital terrain model and its information can be retrieved based on the location and elevation information. The overall terrain information corresponds to each local area of ​​the overall digital terrain model. The overall digital terrain model corresponding to each target terrain area is pre-built and stored using a DEM. The overall terrain information is collected by acquisition devices and sensors pre-installed at the target terrain area location. The user-worn device features dual cameras with 3D imaging capabilities. It can use the two cameras to create images of local terrain areas captured by the dual cameras, obtaining a local terrain model. After obtaining the local terrain model, it is compared with the overall digital terrain model to obtain the target terrain model corresponding to the local terrain model in the overall digital terrain model. Then, the target terrain information corresponding to the target terrain model is retrieved from the overall terrain information and projected onto the local terrain model formed by the dual cameras. This allows for the real-time transmission of local terrain information captured by the dual cameras to the formed local terrain model, thus enabling the acquisition of relevant local terrain data. Attached Figure Description

[0057] Figure 1 This is a flowchart of a terrain data acquisition method according to an embodiment of this application;

[0058] Figure 2 This is a flowchart of the target digital terrain model method in the embodiments of this application;

[0059] Figure 3 This is a flowchart of the target planar image information method corresponding to the first case in the embodiments of this application;

[0060] Figure 4 This is a flowchart of the target planar image information method corresponding to the first case in the embodiments of this application;

[0061] Figure 5 This is a flowchart of a terrain data acquisition system according to an embodiment of this application.

[0062] Explanation of reference numerals in the attached figures:

[0063] 1. Positioning module; 2. Location determination module; 3. Overall model acquisition module; 4. Overall information acquisition module; 5. Local model acquisition module; 6. Control module; 7. Storage module; 8. Information transmission module; 9. Overall image acquisition module; 10. Local image acquisition module. Detailed Implementation

[0064] The following is a further detailed description of this application.

[0065] This application discloses a method for acquiring terrain data, referring to... Figure 1 This includes the following steps:

[0066] S1, During the detection process at the user's location, it is necessary to obtain the user's location information in real time and determine the location and elevation information of the target terrain area corresponding to the user based on the user's location information.

[0067] S2 responds to the data acquisition operation of the target terrain area's location and elevation information. The acquisition work is carried out by collecting various data of the target terrain through data acquisition equipment and sensors pre-installed on the target terrain. Then, based on the target terrain area's location and elevation information, the corresponding overall digital terrain model is retrieved. The data of the overall digital terrain model is collected in advance and updated in real time. The digital terrain model of the terrain can be obtained using DEM technology and stored on a cloud server. At the same time, based on the target terrain area's location and elevation information, the overall terrain information corresponding to the overall digital terrain model is obtained. The overall terrain information includes parameters such as the geological history map and slope of the terrain.

[0068] S3, After the user observes the target terrain, the user's wearable device will image the local area of ​​the target mountain and obtain a local terrain model. The imaging operation of the local terrain is responded to by the dual cameras of the user's wearable device. The 3D imaging of the dual cameras is used to form a 3D image projection on the user's wearable device.

[0069] S4. Compare the retrieved overall digital terrain model and local terrain model. Since the local terrain model corresponds to a part of the overall digital terrain model, the target digital terrain model corresponding to the local terrain model in the overall digital terrain model can be obtained through the comparison results.

[0070] S5, the overall terrain information is a collection of relevant data of multiple local terrains. Based on the target digital terrain model, the corresponding target terrain information is obtained, thereby obtaining the target terrain information corresponding to the local terrain model. Then, the target terrain information is projected onto the local terrain model so that the user can understand and see the target terrain information corresponding to the local terrain.

[0071] In this embodiment, the method for obtaining the target digital terrain model refers to... Figure 2 It also includes the following steps:

[0072] S41, When retrieving the overall digital terrain model, obtain the overall planar image information corresponding to the overall digital terrain model, wherein the overall planar image information is the overall image of the target terrain;

[0073] S42, When acquiring a local terrain model, acquire the local planar image information corresponding to the local terrain model, wherein the local planar image information is a local image of the target terrain seen by the user;

[0074] S43, compare the local planar image information with the overall planar image information. Since the local planar image information corresponds to a part of the overall image information, the target planar image information corresponding to the overall planar image information can be obtained from the local planar image information.

[0075] S44, and then the corresponding target digital terrain model can be obtained based on the target planar image information.

[0076] In the process of acquiring target planar image information, there are generally two situations. The following are examples of the two situations. The first situation refers to... Figure 3 The obtained local planar image information is relatively limited.

[0077] S431, acquire feature point data in the overall planar image information and mark it as first feature point data. There are multiple first feature point data in the overall planar image information, and one first feature point data corresponds to a local area of ​​the terrain. The feature point data is a signal emitted by a pre-installed device and can be acquired in the planar image.

[0078] S432, after acquiring local planar image information, acquire feature point data within the local planar image information and mark it as second feature point data, wherein, in this case, the second feature point data within the local planar image information is one;

[0079] S433, compare the acquired second feature point data with all the first feature point data one by one to determine the first feature point data that matches the second feature point data in the overall planar image information, and define it as the target feature point data;

[0080] S434, Determine the target plane image information based on the target feature point data.

[0081] The second scenario, refer to... Figure 4 The acquired local planar image information is more abundant:

[0082] S431, acquire all feature point data within the overall planar image information and mark them as the first feature point data set, wherein each feature point data is different and the corresponding local region is different;

[0083] S432, Obtain all feature point data within the local planar image information and mark them as the second feature point data set;

[0084] S433, compare the second feature point data in the entire second feature point data set with the first feature point data in the first feature point data set one by one, and then obtain all the first feature point data that match the second feature point data in the overall planar image information, and define them as the target feature point data set;

[0085] S434, Based on the complete set of target feature point data, the information of multiple target plane images corresponding to the local plane image information can be determined.

[0086] Since there may be multiple landslide-prone terrain features within a region, the following steps are included after obtaining the user's location information:

[0087] S11, Obtain the target location information that is closest to the user's location information, wherein each target location information corresponds to the location and elevation information of a target terrain area;

[0088] S12, obtain the target distance data between the nearest target location information and the user location information, and compare the target distance data with the preset distance data. If the target distance data is less than the preset distance parameter, the location and elevation information of the target terrain area can be determined. Otherwise, the user continues to move towards the target terrain.

[0089] The process of acquiring a local terrain model also includes the following steps:

[0090] In response to the wearable device's distance test of the target terrain, the actual distance information is obtained and compared with the preset imaging distance information. If the actual distance information is greater than the imaging distance information, no imaging operation is performed; otherwise, imaging operation is performed.

[0091] The implementation principle of a terrain data acquisition method according to an embodiment of this application is as follows:

[0092] When monitoring personnel (users) conduct on-site monitoring of the terrain, the user's location information is first obtained in real time. After obtaining the user's location information, the distance between the user and the nearby terrain needs to be obtained to determine the location information of the target closest to the user, thereby determining the target terrain to be monitored. The location and elevation information of the corresponding target terrain area are then retrieved. The target distance data between the user's location information and the target location information is then determined, and the target distance data is compared with the preset distance parameter. If the target distance data is less than the preset distance parameter, the location and elevation information of the target terrain area can be determined.

[0093] After determining the location of the target terrain area, the corresponding overall digital terrain model and overall terrain information can be retrieved based on the location and elevation information of the target terrain area. In addition, the dual cameras on the user's wearable device have 3D imaging capabilities. The two cameras can be used to form an image of the local terrain area captured by the dual cameras to obtain a local terrain model. When obtaining the local terrain model, the user's wearable device will obtain the actual distance information between the user and the target terrain in real time and compare the actual distance information with the preset imaging distance information. If the actual distance information is greater than the imaging distance information, no imaging operation will be performed. As the user continues to walk towards the target terrain, the imaging operation will be performed when the actual distance information is less than the imaging distance information.

[0094] After acquiring the local terrain model, the corresponding local planar image information is obtained, and the overall planar image information corresponding to the overall digital terrain model is retrieved. Feature point data in the overall planar image information is obtained and marked as first feature point data. Feature point data in the local planar image information is also obtained. When the number of feature point data is one, it is marked as second feature point data. Then, the second feature point data is compared with all the first feature point data to determine the target feature point data. The target planar image information in the overall planar image information can then be determined based on the target feature point data. Alternatively, in acquiring the local planar image information, feature point data is obtained. When the number of feature point data is multiple, it is marked as a second feature point data set. All the first feature point data in the entire overall planar image information is also marked as a first feature point data set. Then, each second feature point data in the second feature point data set is compared with all the first feature point data in turn to determine the target feature point data one by one. The set of multiple target planar image information in the overall planar image information can then be determined based on the multiple target feature point data.

[0095] After determining the target planar image information, the target terrain model corresponding to the local terrain model in the overall digital terrain model can be obtained. Then, the target terrain information corresponding to the target terrain model in the overall terrain information can be retrieved, and the target terrain information can be projected onto the local terrain model formed by the dual cameras. In this way, the local terrain information captured by the dual cameras can be transmitted to the formed local terrain model in real time, which means that the relevant terrain data of the local terrain can be obtained.

[0096] A terrain data acquisition system, referring to Figure 5 It includes a positioning module 1, a location determination module 2, an overall model acquisition module 3, an overall information acquisition module 4, a local model acquisition module 5, a control module 6, a storage module 7, and an information transmission module 8;

[0097] Location module 1 is used to acquire and output the user's location information.

[0098] Location determination module 2 is connected to positioning module 1. It receives user location information and determines the location and elevation information of the target terrain area to be investigated in the user's area. The information is then stored in storage module 7.

[0099] The overall information acquisition module 4 is connected to the positioning module 1 and the location determination module 2. It receives user positioning information and acquires overall terrain information, which is then stored in the storage module 7.

[0100] The overall model acquisition module 3 is connected to the location determination module 2. It acquires the overall digital terrain model based on the location and elevation information of the target terrain area and stores it in the storage module 7.

[0101] Local model acquisition module 5 uses the dual cameras on the user's wearable device to image the local terrain and acquire the corresponding local terrain model, which is then stored in storage module 7.

[0102] The control module 6 is connected to the overall model acquisition module 3 and the local model acquisition module 5. It compares the local terrain model and the overall digital terrain model and outputs the target digital terrain model corresponding to the local terrain model in the overall digital terrain model.

[0103] Storage module 7, connected to location determination module 2, overall information acquisition module 4, overall model acquisition module 3, and local model acquisition module 5, is used to store data;

[0104] The information transmission module 8 is connected to the control module 6. It outputs the corresponding target terrain information based on the target digital terrain model and transmits the target terrain information to the local terrain model.

[0105] When monitoring personnel (users) conduct on-site monitoring of the terrain, the positioning module 1 can obtain the user's location information in real time. The location determination module 2 obtains the location and elevation information of the target terrain area to be monitored based on the user's location. After determining the location of the target terrain area, the overall model acquisition module 3 can retrieve the corresponding overall digital terrain model and the corresponding overall terrain information based on the location and elevation information of the target terrain area. The overall terrain information corresponds to each local area of ​​the overall digital terrain model. The overall digital terrain model corresponding to each target terrain area location is pre-built using DEM and stored in the storage module 7. The overall terrain information is obtained by pre-installing modules on the target terrain area. Data is collected by acquisition devices and sensors at the regional location. During the monitoring process, the local model acquisition module 5 can acquire the local terrain model in real time. After acquiring the local terrain model, the control module 6 compares the local terrain model with the overall digital terrain model to obtain the target terrain model corresponding to the local terrain model in the overall digital terrain model. Then, the information transmission module 8 retrieves the target terrain information corresponding to the target terrain model from the overall terrain information and projects the target terrain information onto the local terrain model formed by the local model acquisition module 5. This enables the local terrain information of the local model acquisition module 5 to be transmitted to the formed local terrain model in real time, that is, the relevant terrain data of the local terrain can be obtained.

[0106] In addition, the system also includes an overall image acquisition module 9 and a local image acquisition module 10;

[0107] The overall image acquisition module 9 is connected to the storage module 7 and is used to acquire the overall planar image information corresponding to the overall digital terrain model. The overall planar image information is acquired in advance and stored in the storage module 7.

[0108] The local image acquisition module 10 is connected to the storage module 7 and is used to acquire local planar image information corresponding to the local terrain model. The local planar image information is acquired and updated in real time and stored in the storage module 7.

[0109] The control module 6, connected to the overall image acquisition module 9, the local image acquisition module 10, and the storage module 7, compares the local planar image information with the overall planar image information to determine the target planar image information, and acquires the corresponding target digital terrain model based on the target planar image information.

[0110] In the stage of acquiring the target digital terrain model, the overall image acquisition module 9 first acquires the overall planar image information corresponding to the overall digital terrain model, and the overall planar image information can be acquired before acquiring the target digital terrain model. The local image acquisition module 10 acquires the local planar image information corresponding to the local terrain model while acquiring the local terrain model. Then, the control module 6 matches the local planar image with the overall planar image information to acquire the target image information that matches the local planar image in the overall planar image information. Subsequently, the target digital terrain model corresponding to the target image information is retrieved from the overall digital terrain model, thereby realizing the acquisition of the target digital terrain model.

[0111] This application provides a smart terminal, including a memory and a processor, wherein the memory stores a computer program that can be loaded and executed by the processor, such as a terrain data acquisition method.

[0112] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A method for acquiring terrain data, characterized in that, Includes the following steps: Obtain the user's location information to determine the location and elevation information of the target terrain area corresponding to the user; In response to the data acquisition operation of the target terrain area's location and elevation information, the corresponding overall digital terrain model is obtained based on the target terrain area's location and elevation information, and the overall terrain information corresponding to the overall digital terrain model is also obtained. In response to the imaging operation of the dual cameras on the user's wearing device on the local terrain, a local terrain model is obtained; By comparing the local terrain model and the overall digital terrain model, the target digital terrain model corresponding to the local terrain model in the overall digital terrain model is obtained; Obtain the corresponding target terrain information based on the target digital terrain model and project it onto the local terrain model; When acquiring the target digital terrain model, the following is also included: Obtain overall planar image information corresponding to the overall digital terrain model; Obtain local planar image information corresponding to the local terrain model; The local planar image information is compared with the overall planar image information to obtain the target planar image information corresponding to the overall planar image information; In the process of acquiring target planar image information, feature point data in the overall planar image information are acquired and marked as first feature point data, wherein one first feature point data corresponds to a local area of ​​terrain; Acquire feature point data within the local planar image information and label them as second feature point data; By comparing the second feature point data and the first feature point data, the first feature point data that matches the second feature point data within the overall planar image information is obtained and defined as the target feature point data; Determine the target planar image information based on the target feature point data; All feature point data within the overall planar image information are acquired and labeled as the first feature point data set, wherein each feature point data is different and corresponds to a different local region; Obtain all feature point data within the local planar image information and label them as the second feature point data set; Compare all the second feature point data sets with the first feature point data sets, obtain all the first feature point data sets that match the second feature point data sets within the overall planar image information, and define them as the target feature point data set; Determine the target planar image information based on the complete set of target feature point data; Obtain the corresponding target digital terrain model based on the target planar image information.

2. The method for acquiring terrain data according to claim 1, characterized in that, After obtaining the user's location information, the following steps are also included: Obtain the location information of the target closest to the user's location information, where each target location information corresponds to the location and elevation information of a target terrain area; Obtain the target distance data between the nearest target location information and the user location information, and compare the target distance data with preset distance data to determine the location and elevation information of the target terrain area.

3. The method for acquiring terrain data according to claim 1, characterized in that, The process of acquiring a local terrain model also includes the following steps: In response to the wearable device's distance test of the target terrain, the actual distance information is obtained and compared with the preset imaging distance information. If the actual distance information is greater than the imaging distance information, no imaging operation is performed; otherwise, imaging operation is performed.

4. A terrain data acquisition system, acquiring terrain data according to the terrain data acquisition method according to any one of claims 1 to 3, characterized in that, It includes a positioning module (1), a location determination module (2), an overall model acquisition module (3), an overall information acquisition module (4), a local model acquisition module (5), a control module (6), a storage module (7), and an information transmission module (8); The positioning module (1) is used to acquire and output the user's location information; The location determination module (2) is connected to the positioning module (1), receives user positioning information and determines the location and elevation information of the target terrain area to be investigated in the user's area, and stores it in the storage module (7); The overall information acquisition module (4) is connected to the positioning module (1) and the location determination module (2), receives user positioning information and acquires overall terrain information, and stores it in the storage module (7); The overall model acquisition module (3) is connected to the location determination module (2), and acquires the overall digital terrain model based on the location and elevation information of the target terrain area, and stores it in the storage module (7); The local model acquisition module (5) performs imaging operations on the local terrain using the dual cameras of the user's wearing device to acquire the corresponding local terrain model, which is then stored in the storage module (7). The control module (6) is connected to the overall model acquisition module (3) and the local model acquisition module (5), compares the local terrain model and the overall digital terrain model, and outputs the target digital terrain model in the overall digital terrain model that corresponds to the local terrain model. The storage module (7) is connected to the location determination module (2), the overall information acquisition module (4), the overall model acquisition module (3), and the local model acquisition module (5), and is used to store data; The information transmission module (8) is connected to the control module (6), outputs the corresponding target terrain information according to the target digital terrain model, and transmits the target terrain information to the local terrain model; The overall image acquisition module (9) is connected to the storage module (7) and is used to acquire the overall planar image information corresponding to the overall digital terrain model, wherein the overall planar image information is acquired in advance and stored in the storage module (7); The local image acquisition module (10) is connected to the storage module (7) and is used to acquire local planar image information corresponding to the local terrain model. The local planar image information is acquired and updated in real time and stored in the storage module (7). The control module (6) is connected to the overall image acquisition module (9), the local image acquisition module (10), and the storage module (7). It compares the local planar image information with the overall planar image information and determines the target planar image information, and obtains the corresponding target digital terrain model based on the target planar image information.

5. A smart terminal, characterized in that, It includes a memory and a processor, wherein the memory stores a computer program that can be loaded by the processor and executed according to any one of claims 1 to 3.

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