A method for extracting and recognizing groove ridges based on curvature

Abstract

The invention discloses a method for extracting and identifying a groove ridge line based on curvature, which comprises the following steps: S1, acquiring lattice point data through a method of reading MICAPS fourth type data; S2, calculating the isobaric line and the isoline according to the grid point data, and judging the high-low pressure partition according to the isoline; S3, judging whetherthat isobaric line is a closed curve, if so, entering a step S5, otherwise, entering a step S4; S4, extracting the groove point and the ridge point of the isobaric line according to the curvature method, and proceeding to step S6; S5, extracting the groove points and the ridge points of the isobaric line according to the high and low pressure zones, and proceeding to step S6; S6, tracking the groove point and the ridge point and connecting the groove line and the ridge line to realize the extraction and recognition of the groove ridge line. The present invention solves the problems of large workload, large manpower input, low efficiency and low accuracy caused by deviation of analysis result in the prior art.

Description

technical field [0001] The invention belongs to the technical field of automatic analysis of weather circulation maps, and in particular relates to a method for extracting and identifying ridge lines based on curvature. Background technique [0002] In meteorology, the trough line refers to the line connecting the points with the largest cyclonic curvature of the isobar and the lowest air pressure (or geopotential height) in the low-pressure trough. The trough line is the strongest horizontal convergence of the airflow in the low-pressure trough area. Usually, the weather changes are more obvious near the trough line. For example, in the westerly belt, the southerly wind is often blown in front of the trough line, there is an upward movement, and abundant water vapor can form clouds and precipitation. The northerly wind blows mostly at the rear of the trough line, and there is a sinking movement, and the weather is often sunny and cloudless. This feature of the trough line...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a method for extracting and identifying groove-ridge lines based on curvature with high practicability, reduced workload, saving manpower input, high efficiency and high accuracy, which avoids the analysis results Errors and deviations occur, which solves the problem of low accuracy caused by large workload, large manpower input, low efficiency and deviation of analysis results in the existing technology

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