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Glacier area change monitoring method based on remote sensing image fusion

A technology of remote sensing image and area change, applied in measurement devices, image enhancement, image analysis, etc., can solve problems such as sudden change in color, and achieve the effect of improving monitoring accuracy, facilitating information extraction, and narrowing the research area.

Inactive Publication Date: 2017-07-07
INST OF REMOTE SENSING & DIGITAL EARTH CHINESE ACADEMY OF SCI
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Problems solved by technology

Aiming at the problem that the traditional glacier change detection method needs to separately count the glacier area in the study area in different periods, this method proposes a glacier change monitoring and analysis method based on the pixel analysis method for Landsat data. Carry out the hue replacement IHS fusion of homologous data, so that the actual glacier change area will have a color mutation in the fused image, so as to realize the monitoring of glacier change

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  • Glacier area change monitoring method based on remote sensing image fusion
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[0022] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to make a clearer and clearer definition of the protection scope of the present invention.

[0023] See figure 1 , The present invention discloses a remote sensing image fusion method for glacier change monitoring, including the following steps:

[0024] 1) The two phases of multispectral images to be fused are preprocessed (registered), geometric correction and radiation correction are performed respectively, and the two phases of multispectral images are transformed into IHS space; the positive and negative transformations between RGB space and IHS space can be obtained by formula (1) , (2) Realization.

[0025]

[0026]

[0027] Where ν 1 , V 2 Is an intermediate variable, H=tan -1 (v 1 / v 2 ).

[0028] 2) Calculate the ...

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Abstract

The invention discloses a glacier area change monitoring method based on remote sensing image fusion. The method comprises the steps of (1) carrying out geometric correction and radiometric correction on homologous LANDSAT images of two periods, carrying out IHS decomposition on images of different periods, obtaining the brightness, hue, saturation components of the images, (2) through substituting the hue components to obtain a fusion image such that a glacier change area is highlighted, and (3) using a decision tree classification method to extract a glacier area change area. According to the method, homologous remote sensing images are used to monitor a glacier change, the information of the glacier change area is enhanced, the method has the advantages of a small amount of calculation, high monitoring efficiency and easy implementation, a new measure is provided for monitoring the glacier change, and a result is visual and clear.

Description

Technical field [0001] The invention relates to a glacier area change monitoring method based on remote sensing image fusion, belonging to the field of earth observation and cryosphere. Background technique [0002] Since the 20th century, the speed of global climate change has been accelerating and strengthening to a certain extent. Glaciers are an indicator of climate change and are extremely sensitive to climate change. As climate warms, glaciers accelerate retreat, and glacial debris flows will enter a high tide period, which may form glacial debris flow disaster points. Glacier change monitoring is one of the indispensable contents in global change and regional environmental research. [0003] Most of the glaciers are located in remote mountainous areas. Measuring the area of ​​glaciers on the spot is time-consuming and laborious. The characteristics of remote sensing coverage, large amount of information, and continuous observation make it a fast and reliable method for glac...

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Application Information

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IPC IPC(8): G06T5/50G06T5/00G01B11/28
CPCG06T5/50G01B11/28G06T2207/20221G06T2207/30181G06T2207/10036G06T5/80
Inventor 刘广任远桢陈云
Owner INST OF REMOTE SENSING & DIGITAL EARTH CHINESE ACADEMY OF SCI
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