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De-glitter method for sun glitter non-sensitive water body index

A water body index, non-sensitive technology, applied in the field of marine environment remote sensing, can solve the problem of not being able to remove the sun glare on the sea surface

Active Publication Date: 2019-05-03
YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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Problems solved by technology

[0008] Aiming at the sea surface solar glare that cannot be removed with algal blooms, floating Enteromorpha (or other large algae) in the prior art, the present invention provides a glare removal method based on a solar flare non-sensitive water index

Method used

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Embodiment Construction

[0037] Combined with the application of the actual remote sensing image, the present invention eliminates the solar flare appearing in the MODIDS image, and further describes the technical solution of the present invention in detail.

[0038] For the sea surface with algal blooms, floating Enteromorpha (or other large algae), there will be sensitive reactions in the red and near-infrared bands. Linear combination to construct Sun-Glint-Deglinted Water Index (SGD-WI) which is not sensitive to solar glare, the formula is as follows:

[0039] SGD-WI=R(λ1)+R(λ3)-a*R(λ2)

[0040] In the formula, a is a coefficient, which is a positive value, and should be adjusted accordingly according to the form and target of the actual application. λ1, λ2, λ3 are the corresponding remote sensing image bands, and R represents the corresponding remote sensing reflectivity.

[0041] The present invention adopts the form of three bands, and adopts linear multi-band combination forms such as two ba...

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Abstract

The invention is based on multiple types of remote sensing satellite images and sun glitter reflectivity spectrum characteristics and provides a de-glitter method for the sun glitter non-sensitive water body index. The method is characterized in that band operation is performed based on a remote sensing image, the de-glitter water body index that is not sensitive to the sun glitter is constructed,and the de-glitter remote sensing image is obtained. The index is based on linear combination of green, red and near-infrared bands. SGD-WI can not only effectively remove the sun glitter of the seasurface without floating objects, but also for sea surface with algal blooms and floating canola (or other large algae). The method is advantaged in that the index SGD-WI is not only suitable for remote sensing image reflectivity images, but also for radiance images and can be utilized for extraction and inversion of the water information and monitoring of parameters such as terrestrial vegetation.

Description

technical field [0001] The invention belongs to the field of marine environment remote sensing, and in particular relates to a method for removing the flare of the solar flare non-sensitive water body index. Background technique [0002] The incident light (including sky light and sunlight) is specularly reflected at the water-air interface, which can form entrance pupil flare, which has a great impact on the sea surface spectrum, and then affects the extraction of water body and water surface information, especially solar flare. For optical satellite remote sensing, sea surface glare is regarded as pollution by water color remote sensing, which is a common problem currently faced. Sea surface glare also has an important impact on the remote sensing detection and evaluation of sea surface optical information (including algae, sediment, etc.). Especially for high-resolution remote sensing effects, the removal of sea surface flare effects is more important. [0003] In the p...

Claims

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Application Information

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IPC IPC(8): G01N21/3577G01N21/359
Inventor 邢前国李琳安德玉刘海龙
Owner YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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