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Method and device for reconstructing chlorophyll of water body

A technology of chlorophyll and water body, applied in the field of remote sensing image processing, can solve the problems of aerosol difficulty, difficulty in accurately estimating chlorophyll concentration, aerosol large spatiotemporal differentiation, etc., and achieve high reconstruction accuracy

Active Publication Date: 2022-05-13
南京航天宏图信息技术有限公司
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Problems solved by technology

Since the water-leaving radiance containing water body information accounts for a very small proportion of the total signal received by the sensor, less than 10%, it is difficult to extract the effective water-leaving radiance
However, the content and types of aerosols have large temporal and spatial differences, and it is very difficult to accurately calculate aerosol scattering.
Therefore, it is difficult to accurately estimate the chlorophyll concentration value

Method used

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  • Method and device for reconstructing chlorophyll of water body
  • Method and device for reconstructing chlorophyll of water body
  • Method and device for reconstructing chlorophyll of water body

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Embodiment Construction

[0062] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. The components of the embodiments of the application generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

[0063] Accordingly, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art w...

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Abstract

The invention provides a water chlorophyll a reconstruction method and device, and relates to the technical field of remote sensing image processing, and the method specifically comprises the steps: obtaining a remote sensing image of a target water body; performing cloud removal processing on the remote sensing image of the target water body; calculating a plurality of characteristic factors of each pixel of the remote sensing image of the target water body after cloud removal processing, wherein the plurality of characteristic factors at least comprise Rayleigh correction reflectivity of a preset wave band, a preset number of wave band ratio, an ocean water color index and a spatial difference value of the preset wave band; and processing the plurality of characteristic factors of each pixel by using a pre-trained chlorophyll reconstruction model to obtain a chlorophyll a value of each pixel. Compared with the prior art, the method has high chlorophyll reconstruction precision in a non-cloud-missing region.

Description

technical field [0001] The present application relates to the technical field of remote sensing image processing, in particular to a method and device for reconstructing chlorophyll-a in water bodies. Background technique [0002] At present, the most commonly used method for estimating the chlorophyll concentration of a water body is to use the ratio of the blue-green band remote sensing reflectance (Rrs) band. However, the optical characteristics of the second type of water body are much more complicated than that of the first type of water body. Therefore, the accuracy of estimating the chlorophyll concentration of the second-class water body using the algorithm of the blue-green band remote sensing reflectance (Rrs) band ratio is not high, and the algorithm is not suitable for sea areas with complex water body components. [0003] Due to cloud cover, solar flares, aerosols, etc., there are few effective chlorophyll concentration data obtained through satellites, and the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T11/00G06T5/00
CPCG06T11/00G06T2207/10032G06T5/80G06T5/73G06T5/90
Inventor 汤琼王宇翔房松松周玲杨子谦
Owner 南京航天宏图信息技术有限公司
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