Visual spatio-temporal analysis method of strong convective single structure and structural features

Abstract

The invention discloses a strong convective monomer structure and structure feature visual time-space analysis method. The method mainly comprises the steps of obtaining a feature change trend of a strong convective monomer; and obtaining a three-dimensional image and vertical and horizontal profiles of the strong convective monomer. The process of obtaining the feature change trend of the strong convective monomer comprises the steps of firstly, selecting a feature of the strong convective monomer; secondly, realizing monomer tracking of continuous volume scanning moments through an optical flow method; and finally, according to the selected feature of the strong convective monomer and the realized monomer tracking of the continuous volume scanning moments, representing the feature change trend of the strong convective monomer with a group of curves. The three-dimensional image and the vertical and horizontal profiles of the strong convective monomer are obtained through structure visual analysis. According to the method, automatic tracking of the monomer is realized, and according to the tracking, the feature change trend of the monomer is given; three-dimensional reconstruction of the monomer is realized through a three-dimensional reconstruction technology; and a powerful tool is provided for strong convective short-impending forecast business and scientific research work of meteorologists.

Description

technical field [0001] The invention relates to the field of meteorology, in particular to a single-body tracking algorithm based on an optical flow method and a single-body three-dimensional reconstruction algorithm based on a moving cube algorithm. Background technique [0002] Strong convective weather such as hail, heavy precipitation, thunderstorm and strong wind has the characteristics of small spatial scale, short life cycle, strong suddenness and strong destructive power. At the same time, different types of strong convective cells have different internal structures and particle distributions. For example, the central value and the height of the strong echo core (45-65dbz) of the hail cloud are higher than the heavy precipitation echo, which is prone to overhanging structures [1-4] , reflected in the fact that hail clouds are generally different from simple short-term heavy precipitation in terms of height, intensity, and verticality before hailfall; and the VIL val...

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Problems solved by technology

[0004] (1) The PPI display method adopted by the radar image is to scan 360° at a series of fixed elevation angles for sampling, that is, at a certain elevation angle, the radar antenna scans 360° around the vertical axis Z [5] , the intuition is not high

[0005] (2) The combined reflectance map only shows the highest reflectivity, and the distribution of reflectivity in height cannot be observed

[0006] (3) The profile is not easy to make, and the human-computer interaction experience is poor

[0007] (4) It does not provide the structural characteristics of strong convective cells, such as describing the drape of the echo suspension structure caused by strong updrafts, describing the height distribution and gradient distribution of the reflectivity intensity of the inner core of the cell, etc.; Demonstration of their evolution

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