Method for incorporating geometric object into volume rendering result

A geometric object and volume rendering technology, applied in the field of data visualization, can solve problems such as difficulty in meeting the actual application requirements of interactive analysis, a large number of intersection calculations, and poor real-time performance, and achieve an interactive analysis, good real-time performance, and favorable display. Effect

Inactive Publication Date: 2018-08-28
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

This scheme or similar schemes can eliminate the occlusion problem, but require a large number of intersection operations, and the real-time performance is relatively poor, which is difficult to meet the actual application requirements of interactive analysis

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  • Method for incorporating geometric object into volume rendering result
  • Method for incorporating geometric object into volume rendering result
  • Method for incorporating geometric object into volume rendering result

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Embodiment Construction

[0034] The present invention uses a public hurricane field simulation data set as an example to illustrate the specific implementation of the present invention. The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0035] A method for incorporating geometric objects into volume rendering results, comprising the steps of:

[0036] Step 1. Input the 3D multivariate data field.

[0037] The three-dimensional multivariate data field input in this embodiment is the multivariate data field generated by the U.S. National Center for Meteorological Research for the simulation of Hurricane Isabel in 2003. The data field size is 500x500x100. In addition to the basic flow field vector data U, V, and W, the data field also includes scalar attribute data such as P (Pressure), TC (Temperature), QVAPOR (Water Vapor), CLOUD (Cloud), and PRECIP (Precipitaton).

[0038] Step 2. Construct the geometric object G according to the...

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Abstract

The invention relates to a method for incorporating a geometric object into a volume rendering result and belongs to the field of three-dimensional multivariate data field interactive visualization analysis in scientific computing visualization. According to the method, voxelization is performed on the geometric object, and Gaussian filtering is performed on the voxelized geometric object, so thatreference volume data containing the relevant information of the geometric object are obtained; the reference volume data are adopted to control the volume rendering process of selected attribute volume data on the basis of a ray casting method; the geometric object is superimposed on the volume rendering result of the attribute volume data in the same view space; and therefore, a volume rendering result incorporating the geometric object is obtained. Since a geometric visualization result and a volume rendering result are combined in the same view space, the occlusion problem of a general fusion method is solved, the visibility of the geometric object can be ensured, and the simultaneous display of local details and global situations in a three-dimensional multivariate data field can bebenefitted, and thus, the visual analysis efficiency of the three-dimensional multivariate data field can be improved.

Description

technical field [0001] The invention relates to a data visualization method, in particular to a method for integrating geometric objects into volume rendering results, and belongs to the field of interactive visualization analysis of three-dimensional multivariate data fields in scientific calculation visualization. Background technique [0002] In the field of scientific computing visualization, geometric visualization and volume rendering are two commonly used but different types of data visualization methods. [0003] Geometric visualization is mainly to construct geometric objects (geometric objects) such as icons, charts or pipelines based on input data, and to express scientific data through visual characteristics such as shape, size, direction or color of geometric objects, so as to realize the visualization of scientific data and reveal scientific data. The inherent law or phenomenon of data. For example, drawing streamlines or streamtubes inside a flow field can re...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/10
CPCG06T17/10
Inventor 张文耀赵稳宁建国
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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