A Mangrove Extraction Method Based on Hyperspectral Data

An extraction method and technology of mangroves, applied in the field of classification and extraction of remote sensing images, can solve the problems of a small number of infrared bands, wrong extraction, and inability to distinguish mangroves and other terrestrial vegetation well, so as to improve the classification accuracy and facilitate the process. Effect

Active Publication Date: 2021-08-27
NINGBO UNIV
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Problems solved by technology

The number of infrared bands in multispectral data is small, and the information contained in multispectral data cannot well distinguish mangroves from other terrestrial vegetation, which is easy to cause wrong extraction, and the extraction results cannot accurately reflect the real spatial distribution of mangroves

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  • A Mangrove Extraction Method Based on Hyperspectral Data
  • A Mangrove Extraction Method Based on Hyperspectral Data
  • A Mangrove Extraction Method Based on Hyperspectral Data

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with the examples. The description of the following examples is provided only to aid the understanding of the present invention. It should be pointed out that for those skilled in the art, some modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0035] With the launch of hyperspectral satellites in my country, hyperspectral satellites such as Gaofen 5 (GF-5) and Resources 02D (ZY-02D) can provide hyperspectral data with high spatial resolution; the present invention is aimed at the current mangrove extraction research In order to solve the problem of different objects having the same spectrum in forests, a method for extracting mangroves based on hyperspectral data is proposed.

[0036] As a kind of embodiment, a kind of ...

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Abstract

The present invention relates to a method for extracting mangroves based on hyperspectral data, comprising: step 1, preprocessing hyperspectral data; step 2, calculating normalized normalized vegetation index; step 3, constructing mangrove background difference index; step 4 , Remove misclassified pixels according to the actual situation. The beneficial effects of the present invention are: the present invention firstly calculates the vegetation index to distinguish vegetation from non-vegetation, then constructs the mangrove background difference index to increase the difference between mangrove and other terrestrial vegetation, and determines the threshold to extract mangrove according to the statistical histogram of the sample index, Finally, combined with terrain data, misclassified pixels were removed to achieve fine extraction of mangroves. The process of the invention is easy to realize, is an effective supplement to the existing mangrove extraction method, is beneficial to improve the classification accuracy of mangroves, reflects the real spatial distribution of mangroves, and can provide a scientific basis for the management and protection of mangroves, so it has the advantages of important practical significance.

Description

technical field [0001] The invention belongs to the technical field of classification and extraction of remote sensing images, and in particular relates to a method for extracting mangroves based on hyperspectral data, which integrates vegetation index, spectral information and terrain data to realize individual extraction of mangroves. Background technique [0002] Mangroves grow on the tidal flats in the intertidal zone of tropical and subtropical coasts. They have the functions of preventing waves and embankments, promoting siltation and land reclamation, purifying soil, water and air, and maintaining biodiversity; they have also created significant social and economic value. The area of ​​mangroves in the world is decreasing at an average annual rate of 1%. After repeated destruction of mangroves in China, the area has been drastically reduced, the quality of forests has declined, biodiversity has been severely damaged, and ecological services cannot be fully utilized. ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/62G06K9/00
CPCG06V20/13G06F18/24323
Inventor 杨刚黄可孙伟伟
Owner NINGBO UNIV
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