Typhoon center extraction method

An extraction method and typhoon technology, applied in the field of meteorological satellite data processing, can solve problems such as insufficient precision, harsh original data requirements, and complex algorithms, and achieve the effects of improving accuracy, reducing sensitivity, and high adaptability

Inactive Publication Date: 2014-05-28
HANGZHOU NORMAL UNIVERSITY +1
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Problems solved by technology

[0015] The present invention mainly solves the technical problems existing in the prior art that the algorithm is complicated, the precision is not high enough, and the requirements for the original data

Method used

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Embodiment

[0048] Embodiment: a kind of typhoon center determination method of this embodiment, such as figure 1 shown, including the following steps:

[0049] S100, determine the typhoon high wind speed cloud system area;

[0050] S200. Determine the vortex area near the center of the typhoon;

[0051] S300. Determine the center of the typhoon.

[0052] First of all, the high-wind-speed cloud system area is determined to be able to extract the typhoon high-wind-speed cloud system area relatively quickly, waiting for subsequent technical extraction. The typhoon high wind speed cloud system area can be extracted by using the higher typhoon wind speed as the threshold, and then using the high wind speed boundary corner point as the high wind speed area boundary. The boundary point threshold is 17m / s.

[0053] Then, the near-central vortex area is extracted in the high-wind speed cloud system area, and the wind direction vector is used to superimpose the minimum mode to judge whether it...

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Abstract

The invention provides a typhoon center extraction method, for the purpose of disclosing a method for determining a typhoon center from microwave scatterometer data. The method comprises the following steps: S100, determining a typhoon high wind speed cloud area through a threshold; S200, dividing pixels in the typhoon high wind speed cloud area into a plurality of secondary matrixes, classifying the pixels in each matrix according to wind directions and performing vector assignment according to categories, superposing pixel vectors in one matrix, and selecting a secondary matrix whose final superposing vector mode is the smallest as a typhoon near-center whirlpool area; and S300, classifying the pixels in the typhoon near-center whirlpool area according to the wind directions, counting the number of categories, and selecting a 3*3 area whose category number is the smallest as the typhoon center. The scheme provided by the invention is direct and clear, the precision is high, and the error sensitivity is low, therefore, the typhoon center extraction method is suitable for various meteorology analysis centers.

Description

technical field [0001] The invention relates to the field of meteorological satellite data processing, in particular to a method for extracting typhoon center from microwave scatterometer data. Background technique [0002] The existing typhoon center determination technology is mainly aimed at meteorological satellite data, and the typhoon center determination technology for microwave scatterometer data is relatively lacking. The main technologies are: [0003] 1. Dvorak technology; [0004] 2. Template matching technology; [0005] 3. Discrimination of persistence and climate characteristics; [0006] 4. Wind field analysis technology; [0007] 5. Typhoon rotation positioning method; [0008] 6. Mathematical morphology. [0009] The above methods are used to determine the typhoon center through satellite cloud images. [0010] The State Intellectual Property Office of the People's Republic of China published a patent document whose publication number is CN1828668A o...

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Application Information

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IPC IPC(8): G06T7/00G01W1/00G06T7/11
Inventor 胡潭高张煜洲张登荣徐俊锋王洁谢斌吴文渊
Owner HANGZHOU NORMAL UNIVERSITY
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