34results about How to "Achieve real-time rendering" patented technology

Provided is a real-time ray cast volume rendering method of three-dimensional earthquake volume data. The compute unified device architecture (CUDA) parallel technology is used for judging whether volume data blocks are visible, then the CUDA parallel technology is used for judging whether current resolution ratios of the volume data blocks need improvement, the two steps start looping from low-resolution, the resolution ratios are improved step by step until resolution ratio requirements are met, or the resolution ratios can not be improved due to insufficient video memory or a highest resolution ratio is achieved, and therefore the resolution ratios respectively used by the volume data blocks in the process of final render can be confirmed. The multithreading technology is used in the process of render processing for carrying out I / O dispatch on the volume data blocks to be dispatched, and meanwhile, the CUDA parallel technology is used for carrying out ray cast volume rendering on dispatched data. Compared with a ray cast volume rendering method in the prior art, the real-time ray cast volume rendering method is applicable to real-time volume rendering of massive volume data and can be used for rendering of data with various resolution ratio grades in a scene, computation speed is fast, and imaging effect is good.

The invention is a method for real-time drawing geometric model of realistic 3D topography, characterized in comprising the following steps of: (1) preprocessing topographical data to its structure accord to the follow-up operation; (2) adopting a topographical planning algorithm of making file-file real-time switching based on traditional LRU algorithm and the method of integrating viewpoint interests to complete the real-time planning for large-scale topographical files; (3) simplifying topographical model based on geometric Mip Map topographical network implementing and generating algorithm;(4) displaying topographical feature based on multi-grain GPU topographical Bump Map rendering algorithm; (5) realizing topographical data conversion based on four-tree ergodic topographical partial-replacing algorithm. The invention solves the problem of the drawing speed of topographical model being low, raising the drawing efficiency and achieving the purpose of real-time drawing dynamical topography.

Provided is a real-time ray cast volume rendering method of three-dimensional earthquake volume data. The compute unified device architecture (CUDA) parallel technology is used for judging whether volume data blocks are visible, then the CUDA parallel technology is used for judging whether current resolution ratios of the volume data blocks need improvement, the two steps start looping from low-resolution, the resolution ratios are improved step by step until resolution ratio requirements are met, or the resolution ratios can not be improved due to insufficient video memory or a highest resolution ratio is achieved, and therefore the resolution ratios respectively used by the volume data blocks in the process of final render can be confirmed. The multithreading technology is used in the process of render processing for carrying out I / O dispatch on the volume data blocks to be dispatched, and meanwhile, the CUDA parallel technology is used for carrying out ray cast volume rendering on dispatched data. Compared with a ray cast volume rendering method in the prior art, the real-time ray cast volume rendering method is applicable to real-time volume rendering of massive volume data and can be used for rendering of data with various resolution ratio grades in a scene, computation speed is fast, and imaging effect is good.

The present application provides a method and device for improving the rendering efficiency of GIS point data at the browser end, which is characterized in that it includes: storing GIS point data, the GIS point data including identification ID and spatial geographic coordinates; and the corresponding graphic files are encapsulated into a browser-side canvas object; batch rendering is performed on the browser-side canvas object. This application supports commonly used SQL Server, Oracle, Dameng, Jincang and other databases, GeoPackage and UDB database files, as well as GIS point data stored in files such as Excel and CSV, and can realize real-time rendering of a large number of GIS point data on the browser side.

An adjustable hyperspectral detection chip enhanced by a multi-resonance plasmonic mechanism. The detection chip consists of an array of metal nanonail resonator detection units. Each detection unit (1) comprises: a bottom electrode (2), a semiconductor material layer (3), a spacer layer (4), a nanonail array (5), a control material layer (6), a top electrode (7), a peripheral control signal (8), and a driving circuit (9). The positional relationship from top to bottom is the top electrode (7), the control material layer (6), the nanonail array (5), the spacer layer (4), the semiconductor material layer (3), and the bottom electrode (2). The nanonail array (5) is loaded inside the control material layer (6), and the peripheral control signal (8) and the driving circuit (9) are connected to both sides of the control material layer (6).

The invention discloses a method and a device for online preview of a three-dimensional model. The method comprises the steps of locally pre-rendering a picture in multiple view angles for the three-dimensional model; and responding to the online preview of the three-dimensional model. According to the method and the device for the online preview of the three-dimensional model, real data of the model do not need to be loaded locally, a user is prevented from contacting the real data and the data safety is protected; an optimization scheme for rendering of the view angles is provided, thus thenumber of images needing to be drawn is greatly reduced, the data transmission size is decreased and the data transmission time is shortened, the real-time rendering of a three-dimensional scene is realized, and the usage experience of the user is improved; the display performance requirement for mobile terminal equipment is reduced; and the limit of a browser is avoided so that the preview of a large scene becomes possible.