Police oblique-photography real 3D platform system and interface system thereof

[0032] Example one

[0033] Such as figure 1 As shown, this embodiment provides a real-scene 3D platform system for police oblique photography. The real-scene 3D platform system for police oblique photography acquires a real-scene 3D model based on oblique photography technology. The real-scene 3D platform system for police oblique photography includes: real-scene 3D visualization Module 1, 3D measurement module 2, 3D analysis module 3, surveillance video viewing module 4, probe planning and analysis module 5, and thematic information labeling and/or plotting module 6; real-scene 3D visualization module 1 is used to multiply real-scene 3D models Hierarchical, multi-level and block visualization display; 3D measurement module 2 is used to measure the real 3D model of the visible area; 3D analysis module 3 is used to analyze the real 3D model of the visible area; monitoring video viewing Module 4 is used to obtain the monitoring probe distribution data in the database, and accurately mark the position of the monitoring probe in the real three-dimensional model, and view the real-time video of the monitoring probe and/or the historical video of the monitoring probe; the probe planning analysis module 5 is used to obtain The oblique photography technology used in the real-scene 3D model calculates the monitoring area and monitoring blind zone of each monitoring probe; thematic information labeling and/or plotting module 6 is used to label and/or plot the real-scene 3D model of the visible area . The real scene three-dimensional visualization module 1 is also used to obtain and analyze geographic distribution data. In addition, the real scene 3D visualization module 1 realizes multi-level hierarchical and multi-level block visualization in the form of LOD (Levels of Detail), and can seamlessly integrate with geographically distributed data such as terrain data and image data.

[0034] Exemplarily, the aforementioned surveillance video viewing module 4 can view the real-time video of the surveillance probe or view the historical video of the surveillance probe by clicking on the icon of the surveillance probe in a specific visual area. Inevitably, the monitor probe icon is an annotation of the real-scene 3D model by the police oblique photography real-scene 3D platform system.

[0035] In addition, based on the real three-dimensional model, the monitoring area and monitoring blind zone of a specific monitoring probe can be calculated. Specifically, in the real three-dimensional model in the visual domain, the monitoring area and monitoring blind area of ​​the specific monitoring probe in a specific direction can be calculated; Rotate the monitoring direction of the monitoring head to obtain the monitoring area and the monitoring blind area in the other direction.

[0036] The police oblique photography real scene 3D platform system provided in this embodiment can provide the public security system with accurate geographic distribution data, so as to achieve deep integration with the public security system, thereby improving the public security organs’ capabilities in combat command, management analysis, and rapid response. .

[0037] The 3D measurement module 2 in this example may include a space distance measurement unit, a space area measurement unit, and a total element measurement unit; among them, the space distance measurement unit is used to measure the space of the real 3D model in the visible area. For the measurement of the distance between two points, the space area measurement unit is used to measure the area of ​​a plane composed of any three and/or four points of the real three-dimensional model in the visible area. The total element measurement unit is used to The measurement of the horizontal and/or vertical distance of the real 3D model in the area.

[0038] Take a specific building as an example, such as figure 2 As shown, the building is an ideal connecting structure of cuboid A and cuboid B. The length, width and height of cuboid A is 10*6*30, and the length, width and height of B is 5*3*15. The above three-dimensional measurement is described in detail For the use of modules, the units of the above length, width and height are all meters (m). Among them, the area of ​​the roof of the rectangular parallelepiped A can be calculated as 60m by the space area measurement unit 2 , The distance from vertex x to vertex y can be calculated as 5.8m by the space distance measuring unit. For measuring the length or width or height of the cuboid A or the cuboid B, the full-element measuring unit can be used.

[0039] The analysis of the visual area by the three-dimensional analysis module 3 includes visual analysis of a person, a vehicle or a probe at a specific observation position point and a visual analysis between two points. Exemplarily, the visual analysis may include spatial visibility analysis, visual domain analysis, and envelope analysis.

[0040] The probe planning analysis module 5 uses different colors to indicate the calculated monitoring area and the monitoring blind area. Exemplarily, the monitoring area can be represented by red, and the monitoring blind zone can be represented by green. As a result, the monitoring area and the monitoring blind zone can be intuitively seen in the visible area, and further, the probe is installed for the monitoring blind zone.

[0041] Exemplarily, the thematic information labeling and/or plotting module 6 may include: an automatic loading unit for automatically loading the labeling and/or plotting into the real 3D model according to the existing thematic data in the database; a custom loading unit, the user According to the labeling and/or plotting information database, custom labeling and/or plotting the real scene 3D model; the target recognition unit is used to identify the real scene 3D model data according to the oblique photography technique, and automatically label and/ Or plot it in the real 3D model.

[0042] In order for those skilled in the art to understand this solution more clearly, the two units of the above-mentioned thematic information labeling and/or plotting module are first described by examples:

[0043] Exemplarily, the automatic loading unit can automatically load, label, and/or plot the monitoring probe distribution data in the database and the monitoring room location data into the real three-dimensional model.

[0044] Exemplarily, in the custom loading unit, the user can easily and quickly annotate and/or plot the data in the annotation and/or plotting information database in the real 3D model by dragging with the mouse, or the real scene The data in the three-dimensional model is annotated and/or plotted in the information database by means of dragging with the mouse.

[0045] The police oblique photography real scene three-dimensional platform system also includes an authority management module, which is used to set the client's access authority. After setting the access authority, only specific users can access the marked and/or plotted thematic information. Based on the original rights management basic framework of the public security system, the police oblique photography real scene 3D platform system can realize the hierarchical and hierarchical authorization management of real scene 3D module data according to the scope of rights of the logged-in personnel, specifically, for different logged-in personnel Develop different real-scene 3D module data ranges, data types, and corresponding functional ranges. For example, branch police officers can only view the video information provided by surveillance probes within their own jurisdiction and have no right to access surveillance probes outside their jurisdiction.

[0046] The police oblique photography real scene 3D platform system also includes a real scene 3D publishing module, which is used for providing real scene 3D model data publishing and updating real scene 3D model data. It is worth mentioning that the real-scene 3D publishing module can realize the sharing of real-scene 3D model data in the internal network of the public security system after publishing the real-scene 3D model data. Inevitably, the connection between the real scene 3D publishing module and the public security system is through the corresponding interface. In addition, the updated real scene 3D model data can also be used on 2D maps.

[0047] It should be noted that for the above-mentioned thematic information labeling and/or plotting module, it can also be realized that specific thematic information can be set as private labeling and/or plotting, so that only oneself can see it, and some thematic information can be shared to designated customer of.

[0048] The police oblique photography real scene 3D platform system supports no less than 100 concurrent visits. In addition, the operation response time of the police oblique photography real scene three-dimensional platform system is less than 1 second. A large number of visits will not cause access delays to the police oblique photography real-view 3D platform system, and the fast response time can speed up the browsing speed of customers, and further accelerate the combat command, management analysis, and rapid response of public security organs. Ability.

[0049] Example two

[0050] Such as image 3 As shown, this example provides a police oblique photography real scene three-dimensional platform interface system. The police oblique photography real scene three-dimensional platform interface system is used to interface the police oblique photography real scene three-dimensional platform system and PGIS. The police oblique photography real scene 3D platform interface system includes real 3D model storage module 7, real 3D model calling and viewing module 8, real 3D model scene switching module 9, surveillance probe information pushing module 10, video information viewing module 11, 2D The position switching module 12 and the 3D position switching module 13; among them, the real 3D model storage module 7 is used to obtain information in the database connected to the PGIS to generate the real 3D model data record table; the real 3D model calls the viewing module 8 and the real scene The 3D model storage module is connected with 7 modules, which are used to record the data of the real 3D model (the real 3D model record table is used to record the dimensions, coordinates, and apparent height of the real 3D model. Take Hankou Railway Station as an example. The coordinate axis, the center coordinate (x) of Hankou Railway Station is 111.24, the center coordinate (y) is 30.62, the center coordinate (z) is 1, the north is 0, the tilt is 0, and the apparent height is 1000. The above specific value is this Relative value, the specific standard shall be given by the police tilted real scene 3D platform system), generate real scene 3D model distribution vector information, and generate an icon containing the coverage area of ​​the real scene 3D model on each real scene 3D model; real scene 3D model The scene switching module 9 is used to switch the scene in the police oblique photography real scene 3D platform system; the surveillance probe information push module 10 is used to obtain the surveillance probe information in the police oblique photography real scene 3D platform system; video information viewing module 11. It is used to obtain the video information in the database connected with PGIS and view it in the police oblique photography real scene 3D platform system; the 2D position switching module 12 is used to display the 3D display in the police oblique photography real scene 3D platform system Switch to a two-dimensional display; the three-dimensional position switching module 13 is used to obtain the two-dimensional display in the database connected to the PGIS, and switch the two-dimensional display to the corresponding three-dimensional display.

[0051] The police oblique photography real scene 3D platform interface system also includes: a data sharing module for acquiring monitoring room distribution, police room distribution, operation and maintenance data, and labeling and/or drawing symbols in the database connected to the PGIS. Monitoring distribution, police room distribution, operation and maintenance data, and labeling and/or plotting symbols are automatically loaded into the police oblique photography real scene 3D platform system.

[0052] The police oblique photography real scene 3D platform interface system provided in this embodiment has a wealth of interfaces, which effectively seamlessly connects the police oblique photography real scene 3D platform system with PGIS, not only can realize the internal information sharing with the public security system, but also through the use of The real scene 3D model in the police oblique photography real scene 3D platform system can effectively improve the ability of the public security department in combat command, management analysis, and rapid response.

[0053] Example three

[0054] This example provides an integration method of a PGIS or video surveillance system in the prior art and a real-scene 3D platform system for police oblique photography.

[0055] First introduce the integration method at the data level: for the correspondence between two-dimensional data and three-dimensional data, it mainly corresponds to the elements in the three-dimensional scene one-to-one with specific vector diagrams or model points in the two-dimensional layer. During the update operation, this correspondence ensures the consistency of the two- and three-dimensional data.

[0056] The specific implementation method is to associate the three-dimensional data with the data of the two-dimensional layer in the data structure. Therefore, we set the number of the three-dimensional element as the field attribute of the corresponding two-dimensional layer element. The mapping between 3D features and 2D features is linked by 3D feature numbers and the 2D layer corresponding to the 3D feature numbers; while the mapping between 2D and 3D is directly through space coordinate conversion or through 3D feature The attribute numbering is complete.

[0057] The data level integration of the police oblique photography real scene 3D platform system and the existing video surveillance system is achieved by directly calling the URL address of the streaming media service provided by the video surveillance system and the playback plug-in. The query association is realized by directly accessing the relevant attribute table of the surveillance probe database corresponding to the video surveillance system.

[0058] Secondly, it introduces the integration method at the interface level. There are three ways to integrate the police oblique photography real scene 3D platform system with the existing PGIS and/or video surveillance system:

[0059] The first, the integration of two and three dimensions: the integration of two and three dimensions can realize the linkage display of two-dimensional PGIS and three-dimensional PGIS, and the spatial information can be smoothly loaded from low resolution to high resolution, without pop-up independent You can directly view the high-resolution real 3D model data in the window. The prerequisite is that the two-dimensional geographic distribution data must be able to be loaded and displayed normally in the three-dimensional PGIS control, that is, the police tilted real-view 3D platform system can not only visually display the real 3D model, but also load vector maps, satellite images, etc. The base map data supports the large-scale spatial visualization and analysis application of the real 3D model.

[0060] The second is the independent window integration method in the form of plug-in: if the data of the 2D PGIS cannot be loaded in the 3D PGIS, the display and analysis functions of the real 3D model can only be embedded in the PGIS or video surveillance as an independent window in the form of a separate plug-in System. Users can call up the real-life 3D model display window by clicking the icon in the 2D PGIS.

[0061] The third is a completely independent window integration method: the corresponding modules used to display or analyze the real 3D model are integrated with the PGIS and/or video surveillance system in the form of an independent page. Specifically, after clicking on the icon in the 2D PGIS, the 3D browsing window can be called up. This method is completely independent of the operation of the PGIS and/or video surveillance system, does not occupy the memory and computing resources of the PGIS and/or video surveillance system, and has good system stability. Only the corresponding modules needed to display or analyze the real-scene 3D model are connected to the video monitoring system or PGIS for video calling interface.

[0062] Table 1 Comparison of the above three integration methods. In the first method and the second method, the two-dimensional GIS, the video surveillance system and the police oblique photography real scene 3D platform system occupy each other's resources, so the stability is poor. The police oblique photography real scene 3D platform system has a separate thread. There is a problem of grabbing resources with PGIS and video surveillance systems, and the stability is good. Regarding the complexity of interface docking, the first method is more complicated due to the frequent interaction between 2D and 3D, and the third method requires docking with PGIS and video surveillance systems, so the interface docking is the most complicated. .

[0063] Table 1 Comparison table of three integration methods

[0064] stability technical difficulty user experience Interface docking complexity The first Poor stability the best the best Higher The second Poor stability Higher better general The third Good stability general general Most complicated