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34 results about "OpenGL" patented technology

Open Graphics Library (OpenGL) is a cross-language, cross-platform application programming interface (API) for rendering 2D and 3D vector graphics. The API is typically used to interact with a graphics processing unit (GPU), to achieve hardware-accelerated rendering.

Method for dynamic sea surface laser pulse wave beam echo simulation

InactiveCN103472443ARealize Backscatter Echo SimulationSolve the needs of the optical characteristics of the sea environmentWave based measurement systemsSea wavesOpenGL
The invention relates to a method for dynamic sea surface laser pulse wave beam echo simulation. The method for dynamic sea surface laser pulse wave beam echo simulation comprises the following steps that according to a sea spectrum statistic model, a dynamic sea surface is generated by means of the reverse-FFT technology, and the parameters such as the wind speed, the wave height and the sea wave period are considered through the model; space energy distribution and the pulse shape of each emitted laser wave beam are measured, space-time distribution of any laser wave beam is obtained through fitting, and section spatial light intensity distribution at any distance is determined based on energy conservation; a laser radar wave beam back scattering echo radar equation is established based on the radiometry, rough surface processing is conducted on a water surface element, and the water surface element is expressed through a bidirectional reflection distribution function; drawing, coloring, rendering, real-time animation, hidden-line elimination and clipping of the scene are completed based on a computer graphic base OpenGL. The method for dynamic sea surface laser pulse wave beam echo simulation can be applied to different sea condition model machine dynamic intersection virtual experiments, facilitate development of sea surface pulse echo scattering mechanism study, and save a large amount of cost.
Owner:SHANGHAI RADIO EQUIP RES INST

Vehicle all-round multi-view panorama generation method based on OPENGL

The present invention discloses a vehicle all-round multi-view panorama generation method based on an OPENGL. The method comprises the steps of: collecting images comprising special calibration objects by employing four fish-eye cameras respectively installed at the front and back sides and the left and right sides of a vehicle, employing a DLT (Direct Line Transformation) to calculate coordinatesystems of the four cameras and a homograph matrix H of a world coordinate system, and obtaining an Euler angle and a translation vector between the coordinate systems of the four cameras and the world coordinate system through Rodrigues transformation; on this basis, taking vehicle and ground projections as a center to build a flat-bottom bowl model, employing calibrated inner and outer parameters of the cameras to determine a mapping relation of key points in the model and pixel points in fish-eye camera images, mapping texture of each original image onto the flat-bottom bowl model in real time; and finally, controlling movement of a virtual observation camera according to an assigned path, and performing real-time rendering of the scene to obtain an observation result. The vehicle all-round multi-view panorama generation method based on the OPENGL can effectively solve the problem that a traditional 2D panorama distant object is severely stretched, and has good immersion.
Owner:江苏裕兰信息科技有限公司

Satellite orbit gesture visual three-dimensional displaying method

Provided is a satellite orbit gesture visual three-dimensional displaying method. The satellite orbit gesture visual three-dimensional displaying method comprises the steps: (1) building a three-dimensional model, reading a 3DS model in a database, checking whether models are complete or not, sending the 3DS model to a state display if the models are complete, and if the models are not complete, building relevant models, and sending a data request data package to a server and receiving the data request data package at the same time; (2) checking and comparing data in the data package, finding out data needed by the state display, analyzing the data, and dividing the data into two parts, wherein one part of data are ground equipment data, and the other part of data are on-star remote sensing data; (3) for the ground equipment data, extracting time information, calculating sun and moon ephemeris, and calculating the positions of the sun, the earth and the moon, satellite orbit data and the like to be sent to the state display; (4) for the on-star remote sensing data, classifying the data into three types to be displayed, wherein one type of data are health state data, one type of data are component power source state data, and another type of data are gesture information. The state display adopts the OpenGL to carry out three-dimensional model drawing and display.
Owner:CHINA ACADEMY OF SPACE TECHNOLOGY

Fetus panorama display instrument based on ultrasonic and 3D technology

The invention discloses a fetus panorama display method based on an ultrasonic and 3D technology. The method comprises the following steps of image or data obtaining, wherein cross-section image sequences of a fetus are obtained through a B-mode ultrasound probe; image preprocessing and segmenting, wherein the image sequences are subjected to operations like image strengthening, filtering and noise reduction, and a three-dimensional division method based on a maximal interclass variance method is adopted to automatically segment an image area of the fetus; surface reconstruction of a three-dimensional object, wherein according to the preprocessed image sequences, a slice-based method of using a two-dimensional profile line to reconstruct a three-dimensional shape is adopted for three-dimensional reconstructing, and meanwhile, the sex characters of the fetus are removed; arm motion identification, wherein an MYO armlet is utilized to identify the arm motion like leftward motion, rightward motion, upward motion and downward motion, and thus the operations like rotating and turning of the built three-dimensional model can be controlled. An OpenGL is adopted for displaying the reconstruction result, and the three-dimensional model is operated through the further utilization of the identification result of a wristband. By means of the fetus panorama display method based on the ultrasonic and 3D technology, the arm motion identification is applied to 3D panorama displaying of the fetus, and the three-dimensional interaction result can be more visual and convenient.
Owner:FOURTH MILITARY MEDICAL UNIVERSITY

Web-end three-dimensional GIS software design method with geographic space data confidentiality

The invention provides a Web-end three-dimensional GIS (geographic information system) software design method with geographic spatial data confidentiality. The method comprises the following steps that: a client applies for server resources from a three-dimensional GIS cloud service resource scheduling center, and the resource scheduling center allocates idle servers to the client; the client sideresponds to mouse and keyboard operation of the user and encodes the corresponding operation message to obtain an encoded control flow message, and then the encoded control flow message is sent to the server side; the server decodes the received encoded control flow message; the method comprises the following steps: receiving space data, decoding the space data, executing a corresponding functionaccording to operation information of a mouse and a keyboard obtained after decoding, rendering a three-dimensional scene corresponding to the space data into a two-dimensional image, converting thetwo-dimensional image into a corresponding video stream, and sending the video stream to a client to prevent data leakage caused by sending real space three-dimensional data to the client; the serverside is provided with an image buffer area compatible with the OpenGL and the Directx. The method has the advantages that data leakage is effectively avoided, and graphics card resources are reasonably utilized.
Owner:吉奥时空信息技术股份有限公司

A Dynamic Sea Surface Laser Pulse Beam Echo Simulation Method

InactiveCN103472443BRealize Backscatter Echo SimulationSolve the needs of the optical characteristics of the sea environmentWave based measurement systemsSea wavesOpenGL
The invention relates to a method for dynamic sea surface laser pulse wave beam echo simulation. The method for dynamic sea surface laser pulse wave beam echo simulation comprises the following steps that according to a sea spectrum statistic model, a dynamic sea surface is generated by means of the reverse-FFT technology, and the parameters such as the wind speed, the wave height and the sea wave period are considered through the model; space energy distribution and the pulse shape of each emitted laser wave beam are measured, space-time distribution of any laser wave beam is obtained through fitting, and section spatial light intensity distribution at any distance is determined based on energy conservation; a laser radar wave beam back scattering echo radar equation is established based on the radiometry, rough surface processing is conducted on a water surface element, and the water surface element is expressed through a bidirectional reflection distribution function; drawing, coloring, rendering, real-time animation, hidden-line elimination and clipping of the scene are completed based on a computer graphic base OpenGL. The method for dynamic sea surface laser pulse wave beam echo simulation can be applied to different sea condition model machine dynamic intersection virtual experiments, facilitate development of sea surface pulse echo scattering mechanism study, and save a large amount of cost.
Owner:SHANGHAI RADIO EQUIP RES INST

System and method for android platform compatible with native code opengl program

ActiveCN104035768BConsistent resource management processImprove Android application functionsSpecific program execution arrangementsJavaSoftware engineering
The present invention discloses a system and method for acquiring and transmitting Android application program life cycle events and managing OpenGL rendering environment, and realizing compatibility of Android platform with local code OpenGL programs. The system includes: an event processing module, a local front-end and background management module, and OpenGL Environmental management module. The method is applied on the system, and the method includes: obtaining Android application life cycle related events, encapsulating the event through an event processing module, and passing it to the local front and back management module to perform synchronous management on the application life cycle; Automatically manage the OpenGL environment through the OpenGL environment management module, complete the seamless connection between the Android window management system and the local OpenGL environment, and solve the technical problem of drawing the native code OpenGL program to the Java layer window of the Android system; through the local front-end and back-end management module, automatically Control the OpenGL environment to ensure the correctness of the OpenGL rendering environment; use thread synchronization technology to ensure that the Android system resource management process is consistent with the OpenGL environment management process.
Owner:SICHUAN CHANGHONG ELECTRIC CO LTD
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