Multilayer flow field visualization method

A multi-level, flow field technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as complex critical point search and calculation

Active Publication Date: 2016-11-23
COMP NETWORK INFORMATION CENT CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In "A flow-guided streamline seeding strategy, InVis'00: Proceedings of the IEEE Visualization 2000", a flow field topology-guided placement method is disclosed. This method fully considers the topology of the flow field, but the disadvantage is that the critical Complicated point lookup calculations

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings.

[0015] figure 2 It is a schematic diagram of the flow field of the present invention using the same embodiment to place seed points. pass figure 1 and figure 2 By comparison, it can be observed that figure 1 The swirls not shown in the figure 2 can be clearly seen in.

[0016] The specific steps of the improved algorithm described in the embodiment of the present invention are as follows:

[0017] 1. Mesh the flow field:

[0018] Let step be the scanning span of the X, Y, and Z coordinates, and M, N, and L be the number of grids divided by the X, Y, and Z axes, respectively. If the remaining length of scanning to the end of the coordinate axis is less than one step, the end of the coordinate is taken as the end of the last sub-region.

[0019] 2. Calculate sub-region information entropy

[0020] Scan the flow field, calculate the information entropy of each...

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Abstract

The invention discloses a multilayer flow field visualization method and provides a seed point placing method for improving algorithm. The method comprises the following steps: meshing a flow field and computing the information entropy of each subregion; selecting the subregions according to the value of the information entropy and detecting whether the selected subregions have critical points; placing seed points in the selected subregions according to the detection conditions of the critical points; drawing a flow field streamline chart based on selection of the seed points. The method has the beneficial effects that the flow field features can be drawn more accurately and clearly; the flow field can be observed at a macro level or the flow field details can be observed by entering the part.

Description

technical field [0001] The present invention relates to a multi-level flow field visualization method, more specifically, multi-level flow field visualization based on feature information seed point selection. Background technique [0002] Vector field visualization is an important part of scientific visualization, and flow field is an important representative of vector field, so flow field visualization is also an important part of scientific visualization. Among the various flow field visualization methods, it is especially common to represent the flow field in the form of streamlines. Streamlines usually start from a certain seed point, then move forward and backward along the point, get the next point through flow field integration, and finally connect all generated points. In this way, how to place the seed point has become the top priority. There are many existing methods for studying the placement of the seed point, but all of them have defects. [0003] The simples...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G06F19/00
Inventor单桂华巴振宇刘俊陆忠华
OwnerCOMP NETWORK INFORMATION CENT CHINESE ACADEMY OF SCI