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Method of uniform gradient distribution of infrared brightness and temperature deviation angle for location of tropical cyclone center

A tropical cyclone and gradient distribution technology, applied in image analysis, image data processing, instruments, etc., can solve problems such as deviation of positioning results

Active Publication Date: 2018-01-12
ZHEJIANG NORMAL UNIVERSITY
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Problems solved by technology

Algorithms that use pattern matching to locate the center of the TC will have a large deviation in the positioning results when the TC intensity is small and the outer contour is not obvious

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  • Method of uniform gradient distribution of infrared brightness and temperature deviation angle for location of tropical cyclone center
  • Method of uniform gradient distribution of infrared brightness and temperature deviation angle for location of tropical cyclone center
  • Method of uniform gradient distribution of infrared brightness and temperature deviation angle for location of tropical cyclone center

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Embodiment Construction

[0039] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so that how the present invention uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0040] The positioning method based on the uniformity of the deviation angle gradient distribution in the embodiment of the present application is used for positioning the center of a tropical cyclone.

[0041] like figure 1 As shown, the tropical cyclone deviation angle gradient distribution uniformity positioning method based on the infrared satellite image of the embodiment of the present application mainly includes the following steps:

[0042] Step 1. Carry out Bezier histogram segmentation and K-means clustering segmentation on the target area containing tropical cyclones in the satellite cloud image, and perform the AND operation on the results of the two to obta...

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Abstract

The invention utilizes the uniformity of gradient distribution of the infrared brightness and temperature deviation angle to locate the central position of the tropical cyclone. Firstly, a region of interest is intercepted from an infrared satellite image, and Bezier histogram segmentation and K-Means clustering segmentation are respectively conducted to obtain a binary image of a tropical cyclonemain cloud system and a binary image of intense change location of infrared brightness and temperature. Then, the obtained binary images are subjected to Hough transform to detect circle so as to reduce the search range for the tropical cyclone center. Finally, deviation angle gradient distribution uniformity matrix is calculated and obtained with each pixel in a detection area as a reference center, and then the tropical cyclone center lies in the position of the maximum value in the deviation angle gradient distribution homogeneity matrix. Experiments show that the method achieves satisfactory results for the locating of the center of tropical cyclones with or without eye.

Description

technical field [0001] The invention belongs to the field of image processing technology and meteorological disaster monitoring. Specifically, it involves a positioning method based on the uniformity of the gradient distribution of the infrared brightness temperature deviation angle for the purpose of locating the center of the tropical cyclone in the infrared satellite cloud image. Background technique [0002] Tropical cyclone (Tropical cyclone, TC) is one of the most serious meteorological disasters in the world, which has the characteristics of strong suddenness and great destructive power, causing serious casualties and economic losses to the coastal areas. Determining the location of the tropical cyclone center is very important for tropical cyclone forecasting. However, except for a few objective positioning methods, most of the current positioning methods are manual or semi-automatic positioning through satellites and weather radars. Because infrared geostationary s...

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Application Information

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IPC IPC(8): G06T7/66G06T7/11G06T7/64
CPCY02A90/10
Inventor 张长江薛利成
Owner ZHEJIANG NORMAL UNIVERSITY
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