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48 results about "Computer mapping" patented technology

Template based one-button type thematic map automatic forming method and system

The invention discloses a template based one-button type thematic map automatic forming method and system, belonging to the field of computer mapping and relating to the computer automated mapping and mapping synthesized technique. According to the method, a basic data support module comprises a spatial database, a model library and a thematic map mapping template library; the specific mapping steps comprises the follows: establishing the spatial database, selecting content information of the thematic map, establishing the template library, selecting a thematic data representing way, establishing the template library, configuring display information of mapping elements, generating a thematic map configuration XML (Extensive Markup Language) text and analyzing the thematic map configuration XML text, and visually outputting the thematic map configuration XML text. According to the technical scheme provided by the invention, the thematic mapping efficiency and the mapping accuracy can be improved, the mapping automation and intelligence level can be improved, the thematic map making process can be speeded up, and the manpower, the material resources and the financial resources can be economized.
Owner:CHINA UNIV OF GEOSCIENCES (BEIJING)

Anti-counterfeiting pattern manufacturing method using fractal pattern to overlap fractal curve

InactiveCN101739700AGood anti-replication functionEasy to drawImage enhancement2D-image generationGraphicsOmega
The invention discloses an anti-counterfeiting pattern manufacturing method using a fractal pattern to overlap a fractal curve. The pattern manufacturing is finished by two methods, namely the manufacturing of the fractal pattern and the manufacturing of a pattern of the fractal curve. The method comprises the concrete steps of: (1) the manufacturing of the fractal pattern, which comprises the steps of: adopting a mathematical formula to set parameter information and color matching information in a computer drawing panel, and drawing the fractal pattern in the computer drawing panel; (2) the manufacturing of the pattern of the fractal curve, which comprises the steps of: 1, setting an alphabet V, an initial axiom omega and a generative rule P in a computer fractal curve drawing panel; and 2, then setting initial point coordinates (x, y) in the drawing panel in the step 1 to establish the circulation of iteration number n and execute the iteration number from 1 to n, and searching each character in a new character string F produced in the step 3 in sequence; and (3) performing graph overlapping on the fractal pattern manufactured in the step (1) and the pattern of the fractal curve manufactured in the step (2) in the computer drawing panel to obtain an anti-counterfeiting pattern. The method can resist reprography in combination with the embedded fractal curve and special ink printing technology to realize the double anti-counterfeiting function.
Owner:刘弘

Stereoscopic vision detecting drawing board and manufacturing method thereof

ActiveCN103356159ARealize naked mirrorLarge field of viewEye diagnosticsLow noiseParallax
The invention discloses a stereoscopic vision detecting drawing board and a manufacturing method thereof. The drawing board adopts the black and white crossed random point view, is arranged on an optical grating board, and comprises a disguising background and an image area, wherein the drawing board is filled up by the disguising background, and disguising pixel random points are arranged in the disguising background; the image area is positioned in the center of the drawing board, and parallax pixel random points are arranged in the image area; the disguising background comprises a normal luminance pixel area and a gradient luminance pixel area; the normal luminance pixel area is positioned in the center of the disguising background, and the gradient luminance pixel area is positioned on the periphery of the disguising background; the luminance of the arranged disguising pixel random points is gradually darkened in a centrifugal manner; the area of the normal luminance pixel area is larger than that of the image area. The stereoscopic vision detecting drawing board provided by the invention is designed by adopting a modern computer mapping technology, selects a transparent digitization lenticular grating plate to print, realizes the large vision field of stereoscopic vision detecting, has low noise and realizes non-glasses vision detection.
Owner:PLA NAVY GENERAL HOSIPTAL

Method for quadratic curve trend extrapolation accuracy intelligent extension

InactiveCN102968821ASolve common key problems that cannot be extendedIncrease or improve the non-circular curve extension functionImage data processingComputer Aided DesignGraphics
The invention belongs to the field of three-dimensional (3D) modeling for computer graphics, in particular relates to polynomial surface graphics, and relates to a method for quadratic curve trend extrapolation accuracy intelligent extension. The conventional computer-aided design (CAD) software cannot extend a quadratic curve to be intersected with a designated object under the condition of maintaining the original characteristics. The method adopts a quadratic curve extension model to extend the quadratic curve, and comprises the following steps that: a plurality of points {,} are selected from the quadratic curve to be extended and form an arithmetic progression; the application conditions of the quadratic curve extension model are judged; undetermined parameters are determined through a least square method; the quadratic curve extension model is determined; the intersection points of the extension model and a target object are calculated; and the quadratic curve extension model is utilized to extend. The method can also be applied to the accuracy intelligent extension of arbitrary quadratic curve-shaped positions in a plane. The characteristics of the original curve are not changed after the curve is extended, long-distance accurate extension can be realized, the general key problem that the general CAD software cannot extend non-circular curves is solved, and the quadratic curve extension function of the conventional CAD software is added or completed.
Owner:ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE

Method for non-circular curve trend extrapolation similarity intelligent extension

InactiveCN102968819ASolve common key problems that cannot be extendedIncrease or improve the non-circular curve extension function3D modellingGraphicsAlgorithm
The invention belongs to the field of three-dimensional (3D) modeling for computer graphics, in particular relates to polynomial surface graphics, and relates to a method for non-circular curve trend extrapolation similarity intelligent extension. For connection and transition modeling with low precision requirements, non-circular curves with arbitrary shapes are frequently extended to a designated target object. According to the property that characteristic points are selected from a non-circular curve to be extended, the non-circular curve which has a shape being the most similar to the non-circular curve to be extended is selected from four typical non-circular curves to be subjected to trend extrapolation intelligent extension, high-precision extension can be carried out within a neighborhood area adjacent to an extension starting point, and the practical requirements of most graphics and modeling with low precision requirements can be satisfied. The method comprises the following steps that: points M which equals to 3m are selected from the non-circular curve to be extended and form an arithmetic progression; a similar intelligent extension model is selected; the undetermined parameters of the similar intelligent extension model are determined; a non-circular curve extension model is determined; the intersection points of the extension model and the target object are calculated; and the non-circular curve extension model is utilized to extend.
Owner:ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE

Underground curved roadway tunneling construction method

The invention provides an underground curved roadway tunneling construction method. The method comprises the steps of utilizing computer mapping software to draw a curved roadway vertical view, measuring the center chord length and the circle center angle corresponding to the center chord, mapping out the number of construction tunneling steps, calculating and obtaining the tunneling step length,the tunneling step angle and the tunneling width, and excavating and obtaining a curved roadway according to the geometric parameters of the construction tunneling steps. By the adoption of the technical scheme, the computer mapping software is utilized as a tool, constructors can intuitively learn the situation preliminarily before excavation, then the curved roadway vertical view is divided intoa plurality of construction tunneling steps, a computer is utilized for directly calculating and obtaining the tunneling width, the tunneling length and the tunneling step angle needing to be excavated in each construction tunneling step, the constructors carry out accurate construction, the construction quality is ensured, and the excavation deviation between the curved roadway formed after construction and a curved roadway in the original design paper is reduced.
Owner:贵州开磷有限责任公司
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