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System and method for determining spatial hierarchy for polygonal data by using cube-root scaling

A polygon and cube root technology, applied in image data processing, 3D image processing, instruments, etc., can solve problems such as no description, no derivation, etc.

Inactive Publication Date: 2006-07-26
COMP ASSOC THINK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, neither describing nor suggesting a mathematical derivation of the range circle

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  • System and method for determining spatial hierarchy for polygonal data by using cube-root scaling
  • System and method for determining spatial hierarchy for polygonal data by using cube-root scaling
  • System and method for determining spatial hierarchy for polygonal data by using cube-root scaling

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Embodiment Construction

[0044] The present application provides new methodologies (eg, in the form of systems and methods) for determining the spatial hierarchy of polygon data representing images on displays and / or output media (eg, conventional displays and output devices). In the spatial hierarchy, the level of detail at which features are displayed varies according to the distance between the viewpoint and the feature.

[0045] The density calculation method provided by this application can be used, together with the feature prioritization method, to provide the selection of source feature data and the assignment of a specific level of detail of the geometric model to the database. The methods provided by this application can be used to maximize the feature content in the database without exceeding the capacity of the image rendering system. This method can also be used to achieve a constant polygon density at any height. The method can be adapted eg for flight simulation / visual simulation / geogr...

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Abstract

A method of determining a spatial hierarchy for polygon data, comprises obtaining a switching range, and determining a polygon density for the spatial hierarchy, using the switching range and a cube-root scaling factor. Another method of determining a spatial hierarchy for polygon data, comprises determining a cube-root scaling factor based on an altitude parameter, and using the cube-root scaling factor to scale level-of-detail switching ranges for the spatial hierarchy. The methods may be embodied in a computer program (or some unit of code) stored on a computer readable medium, such as a compact disc (i.e. CD), and / or transmitted via a computer network, such as the Internet, or another transmission medium.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefits of co-pending Provisional Application Serial No. 60 / 279,181, entitled "System and Method for Specifying Polygon Budgets, Extents, and Object Dimensions to Spatial Hierarchy Using Cube Root Height Scaling," filed March 27, 2001 right. technical field [0003] The present application relates to determining the spatial hierarchy of polygon data used to represent images on a display device. More particularly, the present application relates to systems and methods for specifying polygon budgets, ranges, object sizes, etc., into spatial hierarchies by using cube root height scaling. Background technique [0004] Computer generation of visual scenes is constrained by limitations in data storage and representation of objects in the scene. Many image rendering techniques have been proposed. [0005] US Patent No. 4,715,005 describes a technique for computer generating visual scenes of hil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T17/00G06T15/10G06T17/20G06T17/05
CPCG06T17/05G06T15/10G06T17/10
Inventor 安德烈·库茨埃克丹·布罗克韦斯蒂芬·格苏克迈克尔·菲奇马克·维尔
Owner COMP ASSOC THINK INC