66 results about "3d terrain" patented technology

A safety critical, time sensitive data system for projecting safety/mission critical data onto a display pair of Commercial Off The Shelf (COTS) light weight projection glasses or monocular creating a virtual 360° HUD (Heads Up Display) with 6 degrees of freedom movement. The system includes the display, the workstation, the application software, and inputs containing the safety/mission critical information (Current User Position, Total Collision Avoidance System—TCAS, Global Positioning System—GPS, Magnetic Resonance Imaging—MRI Images, CAT scan images, Weather data, Military troop data, real-time space type markings etc.). The workstation software processes the incoming safety/mission critical data and converts it into a three dimensional space for the user to view. Selecting any of the images may display available information about the selected item or may enhance the image. Predicted position vectors may be displayed as well as 3D terrain.

A method for extracting a 3D terrain model for identifying at least buildings and terrain from LIDAR data is disclosed, comprising the steps of generating a point cloud representing terrain and buildings mapped by LIDAR; classifying points in the point cloud, the point cloud having ground and non-ground points, the non-ground points representing buildings and clutter; segmenting the non-ground points into buildings and clutter; and calculating a fit between at least one building segment and at least one rectilinear structure, wherein the fit yields the rectilinear structure with the fewest number of vertices. The step of calculating further comprises the steps of (a) calculating a fit of a rectilinear structure to the at least one building segment, wherein each of the vertices has an angle that is a multiple of 90 degrees; (b) counting the number of vertices; (c) rotating the at least one building segment about an axis by a predetermined increment; and (d) repeating steps (a)-(c) until a rectilinear structure with the least number of vertices is found.

The invention discloses a 3D terrain imaging system of the interferometric synthetic aperture radar (InSAR) and an elevation mapping method thereof, which mainly solve the problems that the existing InSAR has bad imaging pragmaticality and can not implement 3D elevation mapping on the fast-changing terrain and the transilient terrain. The system comprises three sub-aperture antennas, a radar transmitter, a radar receiver and an imaging data processor; the imaging signal processor comprises a SAR image processing unit and an InSAR image processing unit. The invention receives radar echo through the three sub-apertures, then conducts SAR imaging process on the radar echo respectively received by the three sub-apertures, and then conducts InSAR imaging process on the obtained SAR complex pattern, wherein the InSAR imaging process comprises image registration, phase filtering and phase unfolding based on cluster analysis. The processed InSAR phase unfolded image is processed with an elevation inversion to recover a three dimensional digital elevation map. The invention has the advantages of wide adaptability to mapped terrains, and high imaging effectiveness, therefore, the invention can be used in the mapping of the 3D terrain.

Disclosed herein is a 3D urban modeling apparatus and method. The 3D urban modeling apparatus includes a calibration unit for calibrating data about a translation and a rotation of at least one capturing device at a time that input aerial images and terrestrial images were captured. A building model generation unit generates at least one 3D building model based on the aerial images and the terrestrial images to which results of the calibration have been applied. A terrain model generation unit generates a 3D terrain model by converting an input digital elevation model into a 3D mesh. A texture extraction unit extracts textures related to the building model and the terrain model from the aerial images and the terrestrial images. A model matching unit generates a 3D urban model by matching the building model with the terrain model, which are based on the textures, with each other.

Disclosed herein is a three-dimensional (3D) digital map system for implementing a navigation and ground collision preventing method using 3D terrain information. The 3D digital map system includes a terrain referenced navigation module configured to receive data from EGI (Embedded GPS/INS), a radio-altimeter (RALT) and a map database, corrects the data to perform accurate navigation computation, and outputs the corrected data, a collision avoidance warning module configured to generate a warning against collision of an aircraft with the ground or an obstacle using the corrected data, a 3D terrain database and an obstacle database, a terrain following module configured to generate a terrain following trajectory of the aircraft using the same information, and a Passive Ranging module configured to receive the 3D terrain database and line-of-sight (LOS) information of a target and calculate distance and position information of the target located on the ground.

A debris flow geological disasters identification method based on remote sensing satellite images comprises the following steps: carrying out primary localization on debris flow disaster areas according to historical disaster data and current meteorological situations; acquiring satellite image data of the positions according to the primarily located disaster positions; carrying out computer automatic recognition on debris flow areas in the satellite images, and extracting automatically recognized debris flow areas; acquiring DEM data of the positions according to the positions of the automatically recognized debris flow areas; carrying out image fusion on the satellite images and the DEM data, and carrying out image enhancement to generate a 3D terrain image with height information; carrying out manual corrections on the automatically recognized debris flow areas based on the 3D terrain image; drawing a debris flow geological disaster area image according to the corrected debris flowrecognition areas, and judging possibility, scale and treatment scheme of further disasters by combining other data.

The invention belongs to the technical field of digital management. The invention relates to an electronic sand table system based on BIM + GIS, which comprises a BIM three-dimensional module, an unmanned aerial vehicle surveying and mapping module, a GIS data module and an electronic sand table system. BIM three-dimensional module is used to establish visual BIM model according to two-dimensionaldesign drawings. The unmanned aerial vehicle (UAV) surveying and mapping module is used for acquiring 3D terrain data of construction area and image data of construction stage. GIS data module is usefor storing GIS data. The electronic sand table system is used to establish the electronic sand table based on the BIM model, the three-dimensional terrain data of the construction area, the image data of the construction stage and the GIS data. Highway engineering management information platform is used to generate the operation interface of electronic sand table based on 3D GIS. The invention is used for realizing the visualization display of the whole landform of the construction area in the three-dimensional geographic information space from the global angle, and has the characteristics of digitalization, visualization and intelligence.

The invention discloses a 3D terrain rendering method which comprises the following steps: the current level of detail (LOD) of a terrain block is determined in accordance with the viewing distance; the gradient parameter is calculated in accordance with the viewing distance and the preset gradient section which corresponds to the current LOD of the terrain block and the vertex height value of the terrain block is corrected with the gradient parameter; and a grid model which is one precision level higher than the current LOD of the terrain block is selected and the terrain block is rendered with the corrected vertex height value. The method and the device render the corrected terrain block data vary continuously in accordance with the variation of the view point; and even the LOD of the terrain block varies, no terrain 'jumping' phenomena appears. The invention discloses a 3D terrain rendering device simultaneously.

A system for visualization of 3D objects and/or 3D terrain includes a processor, a display in communication with the processor, and a range metering device in communication with the processor. The system visualizes the 3D objects and/or the 3D terrain based upon their respective distances from the mobile device and based upon a respective parameter measuring the detail of the 3D object and/or the 3D terrain.

The invention discloses a cGAN-based infinite terrain generation method, a system, a storage medium and a terminal. Data preprocessing: the sketch is overlaid with the existing corresponding positionof the generated terrain, and the terrain gray map of the region adjacent to the position and the surrounding eight directions is packaged to form an entire image to be processed as an input of the terrain generation network; network processing: the image to be processed is processed in the terrain generation network, and the output of the network will create the terrain of the center sketch area,and generate the terrain gray scale map fitting the center area of the surrounding direction through the sketch of the area and the height fluctuation of the surrounding existing terrain; post-processing: multiplying the output terrain gray-scale map of the center region and the region corresponding to the existing terrain by a weight and adding them together, and then assigning the value to theexisting terrain to form the current large-scale terrain gray-scale map; theme rendering. The invention generates complex 3D terrain according to the simple input of a user through depth learning.

The invention discloses an intelligent working system for unmanned engineering machinery and a working method and relates to the field of unmanned and intelligent control. The problems that accordingto existing engineering machinery, in an application process, manpower resources are wasted, working efficiency is low, working accuracy is relatively low, physical and psychological health of a driver are seriously impaired, and intelligent operation cannot be realized due to high workload and a severe working environment are solved. According to the system provided by the invention, a 3D terrain, a vehicle state, working task progress, a working medium and a practical scene are taken as input, vehicle energy consumption and working efficiency are taken as optimization goals, and a working mode of a working device is adjusted and improved continuously based on a deep learning method. Deep learning is taken as an important method for the artificial intelligence. According to the unmanned engineering machinery, for different complex working media, different working scenes and different working modes, a working task and the working mode can be dynamically and rationally changed accordingto data collected by the unmanned engineering machinery itself, the working efficiency and working precision are improved, and the working energy consumption is reduced.

The invention provides an intelligent design method for open-bench blasting. The intelligent design method comprises the steps of a 3D terrain point cloud accurate model of a blasting area is built; blastholes are subjected to self-adaptive arrangement; the blasthole depth is automatically calculated; single-blasthole charge calculation is conducted based on a VORONOI body; the blocked length is calculated automatically; and the blasthole arrangement result is visualized, and the coordinate, the depth, the charge amount and the filling length of each blasthole are displayed in a table form. The intelligent design method acquires great improvement on the aspects of bench blasting design precision, efficiency, economic benefits and the like and meets the requirements of bench blasting for fastness, accuracy and high efficiency.

The invention provides an on-board 3D terrain automatic measuring system and a method. The system comprises a laser transmitting device, a measuring rod, a GPS receiving device, a laser measuring receiving device and a controller; wherein, the laser measuring receiving device is arranged on the measuring rod and used for receiving a laser signal which is transmitted by the laser transmitting device. The measuring rod is arranged on a traveling vehicle; the laser measuring receiving device comprises a plurality of lengthways distributed silicon photocells and a plurality of measuring circuits, wherein, the measuring circuits are respectively connected with the silicon photocells; and the controller is respectively connected with the GPS receiving device and the laser measuring receiving device. The on-board 3D terrain automatic measuring system and the method thereof can automatically measure the 3D terrain in real time, generate the date of the 3D terrain, improve measuring efficiency and reduce measuring cost.

The invention relates to a WebGIS three-dimensional model system based on WebGL. The WebGIS three-dimensional model system comprises a webpage Web browser, a webpage Web server, a WebGIS server and abottom layer data library, the webpage Web browser is used for providing an interactive interface, directly displays three-dimensional image information by calling a user-defined vector layer, sends arequest and receives a response request; the webpage Web server is used for the request sent by the webpage Web browser end; the WebGIS server is used for providing management and service work of spatial data; the bottom layer data library includes a three-dimensional model library and is used for storing information data and the vector layer. Through the user-defined vector layer, the WebGIS three-dimensional model system is directly added into 3D GIS to display 3D terrains, feature details and internal information to avoid downloading and installing of a client end and the problem of compatibility, user visiting is more conveniently and rapidly, and user experience is promoted.

The present disclosure provides an accurate registration method for airborne enhanced synthetic visual virtual and real images based on visual inertial integration. The method includes a visual feature extraction process, a visual inertial fusion process and a virtual and real image registration process. The visual feature extraction process comprises the following steps: receiving pose parametersoutput by an inertial measurement unit, acquiring a 2D image, extracting a runway region from the 2D image, detecting a straight line in the runway region, and extracting a runway edge line; The process of visual inertial fusion includes: defining system state, establishing inertial error transfer equation, obtaining measurement information, nonlinear Kalman filter, modifying pose parameters; Theregistration process of the virtual and real images includes: driving the 3D terrain engine with the modified pose parameters to generate 3D synthetic view, and superimposing the 2D image on the 3D synthetic view to realize the registration of the virtual and real images.

The invention discloses a vertical cavity surface emitting laser (VCSEL) array module and a display device. The VCSEL array module comprises an active matrix display control circuit substrate, a reflector array formed by a first distributed Bragg reflection grating, a semiconductor light-emitting quantum layer array, an aperture array for limiting current distribution, and a reflector array formedby a second distributed Bragg reflection grating; an active matrix display control circuit in the active matrix display control circuit substrate drives the semiconductor light-emitting quantum layerarray to emit light through a metal electrode array. The invention provides a high-density VCSEL array module capable of being produced in scale, the test can be performed in the production process,so that the process can be simplified, and the manufacturing cost can be lowered; the VCSEL array module can be used for multiple applications including light communication, 3D terrain induction, display and printing, and has the stable product structure.

The invention discloses a three-dimensional railroad bed modeling method including: S1, preparing the essential data of railroad bed modeling; S2, determining a demarcation point of an embankment anda cutting at the side of a left road shoulder L1; S3, determining the railroad bed form of a section point0 to the point1; S4, fixing a corresponding railroad bed standard cross section; S5, generating respective closed bodies by sweeping; S6, performing Boolean operation; S7, completing the railroad bed model of all sections at the side of the L1; S8, completing the railroad bed model at the sideof a right road shoulder L2; S9, deleting L1, L2, the embankment, the cutting standard cross section and a 3D terrain surface M; and S10, obtaining the three-dimensional model of railroad bed. According to the high-precision three-dimensional terrain and the road shoulder line, the method determines railroad bed sections by a certain rule, and generates entities by sweeping the railroad bed standard cross section in the corresponding sections, and obtains a railroad bed fitted with the terrain by the Boolean operation. The method is high in modeling efficiency, avoids the additional manual measurement, and is accurate in engineering quantity calculation.

The invention discloses a trace map similarity judging method for rock joint fissure model test, which belongs to the fields of geotechnical engineering and computer graphics. The method includes the following steps: S1, listing an original actual trace map and a simulated trace map; S2, determining similarity thresholds as the basic standard of similarity judging in subsequent steps; S3, preprocessing the original actual trace map and the simulated trace map; S4, making a similarity analysis of the overall gray values; S5, making a similarity analysis of the gray gradation curves; S6, carrying out characteristic direction similarity matching; and S7, making a similarity analysis of the gray density distribution curves. By combining computer image processing and the professional features of geotechnical engineering, the defect that graphics test is too subjective in the previous process of 3D terrain modeling validity test is overcome. The visual analysis of a trace image is converted into a strict algorithm, and thus, a quantitative standard is provided for the validity test of a model.

The invention provides a three-dimensional (3D) terrain model data organization method oriented to network interactive visualization. The method comprises the following steps: effectively decomposing the externally generated 3D model data, extracting terrain center points from the decomposed 3D model individuals with independent attributes, and taking the points as origins of coordinates for coordinate system conversion; establishing grid indexes the grid spacing of which is consistent with that of terrain grids for all the terrain center points of the 3D models; and when a 3D client side loads the model data in a network environment, loading the 3D models at corresponding LODs (level of detail) from a network, wherein, the center points of the models meet the visual condition. In the method, by adopting the loading mode, the one-time loaded data volume of the network models can be reduced maximally, the 3D terrain models at the corresponding LODs can be called based on the visual condition, and the loading and rendering efficiency of the large-scale 3D models in a network-based 3D visualization system can be greatly improved, thus promoting the deep application of the network-based 3D visualization system in various industries.

The present invention provides an indoor and outdoor linked field survey system and method thereof, comprising steps: S1, loading a geographic information database, the geographic information database includes elevation data, high-definition image data, and geographical element information; S2, combining the elevation data with the high-definition image Data are combined to carry out 3D terrain modeling and generate a pyramid data model; S3. Generate a terrain network based on the elevation data in the pyramid data model, and render the terrain network through high-definition image data and geographic element information to construct a realistic 3D terrain scene ; S4. Simulating the flight survey in the constructed three-dimensional terrain scene, and generating a survey report; S5. Conducting field survey according to the survey report, collecting field survey data, updating it into the geographic information database, and repeating steps S1 to S3. The invention updates the three-dimensional terrain scene in real time through field survey data, which reduces the number of field surveys to a certain extent.