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Extraction method of wave height of small waves based on continuous imaging system of water surface state

An imaging system and extraction method technology, applied in the field of remote sensing and water surface remote sensing, can solve the problems of poor backscattering ability of electromagnetic wave signals, not meeting the requirements of X-band radar wave parameter inversion, etc., and achieves wide applicability, strong practicability, The effect of stable extraction

Active Publication Date: 2019-09-03
THE THIRD RES INST OF MIN OF PUBLIC SECURITY
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Problems solved by technology

The radar imaging quality depends on the echo signal reflected by the water surface. Due to the poor backscattering ability of the electromagnetic wave signal on the water surface under low sea conditions, the weak roughness of the water surface basically does not meet the wave parameter inversion requirements of the X-band radar.

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  • Extraction method of wave height of small waves based on continuous imaging system of water surface state
  • Extraction method of wave height of small waves based on continuous imaging system of water surface state
  • Extraction method of wave height of small waves based on continuous imaging system of water surface state

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Embodiment Construction

[0037] In order to describe the technical content of the present invention more clearly, further description will be given below in conjunction with specific embodiments.

[0038] The method for extracting the wave height of small waves based on the continuous imaging system of the water surface state comprises the following steps:

[0039](1) Collect the echoes of the waves in the detection area through the continuous imaging system of the water surface state, and sample and image the echoes of the waves in the detection area to form an N-frame echo image sequence;

[0040] (2) Statistically analyze the pixel point amplitude in the N-frame echo image sequence, and determine the shape parameter k and the scale parameter λ of the Weibull distribution model satisfied by the constant height wave echo;

[0041] (3) Obtain the kurtosis γ of the Weibull distribution satisfied by the constant height wave echo according to the shape parameter k and the scale parameter λ 2normal , and...

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Abstract

The invention relates to a small wave height extraction method based on a water surface state continuous imaging system. The method comprises the following steps: (1) the water surface state continuous imaging system is used for gathering wave echoes in a detection area, the echoes are sampled and imaged, and an N-frame (32 to 128-frame) of echo image sequence is formed; (2) Weibull distribution model parameters satisfied by normal height wave echoes are determined to acquire the offset between a small wave echo kurtosis and the Weibull distribution kurtosis satisfied by normal height wave echoes; (3) a small wave echo texture apparent characteristic ratio is acquired; (4) according to the offset and the echo texture apparent characteristic ratio, wave height factors in a small wave height extraction model are determined; and (5) small wave height data are acquired, the wave height factors are subjected to linear fitting, an empirical correction constant for the small wave height extraction model is obtained, and the small wave height extraction model is thus acquired. The method of the invention is simple, effective, few in occupied resources and is applicable to various types of radar, infrared and visible light imaging systems.

Description

technical field [0001] The invention relates to the technical field of radio remote sensing, in particular to the technical field of water surface remote sensing of a water surface state continuous imaging system, in particular to a small wave height extraction method based on a water surface state continuous imaging system. Background technique [0002] The state of the water surface includes the state of the lake, sea and river. With the development of science and technology and the increase of human interest and demand for new energy and ocean exploration, the remote sensing technology of the state of the lake, river and sea has gradually become a research hotspot for scientists. [0003] Taking the X-band radar ocean wave remote sensing observation as an example, at present, the traditional marine X-band navigation radar is widely used in the remote sensing detection of the sea surface. Collectively, the wavelength emitted by it is below 3 centimeters, and the radar can ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/41G01S7/48
Inventor 王立成云飞祝博荟鲍逸明黄思婕冯宗伟王武
Owner THE THIRD RES INST OF MIN OF PUBLIC SECURITY
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