Plateau mountain shadow area glacier identification method

A recognition method and shadow area technology, applied in the field of image recognition, can solve the problems of ineffective recognition of glaciers, inconsistent conclusions, poor effects, etc., and achieve the effect of clear segmentation threshold, good effect, and improved work efficiency

Inactive Publication Date: 2019-04-16
YUNNAN UNIV +1
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Problems solved by technology

Many research results show that supervised and unsupervised classification methods cannot effectively identify glaciers under the shadow, and the NDSI index (Normalized Difference Snow Cover Index) i...

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  • Plateau mountain shadow area glacier identification method
  • Plateau mountain shadow area glacier identification method
  • Plateau mountain shadow area glacier identification method

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Embodiment Construction

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0033] The Gangjaquba Glacier and its surrounding glaciers in the Tanggula Mountains in the central Qinghai-Tibet Plateau were selected as the experimental research area. The specific locations are as follows: figure 1 shown. The experimental area involves a total of 37 large and small glaciers, with a total area of ​​about 305km 2 . The highest altitude in the area is 6571m, the mountains are tall, the terrain is relatively complex, and many glaciers are lo...

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Abstract

The invention discloses a plateau mountain shadow area glacier identification method, which comprises the following steps: obtaining a Landsat 8OLI plateau mountainous region image, carrying out radiation calibration pretreatment on the Landsat 8OLI plateau mountainous region image, and carrying out atmospheric correction on the calibrated image by using a FLASH model; based on DEM data and solarazimuth and elevation angle information during remote sensing imaging, simulating a corresponding shadow area by using geographic information system software, and performing shadow area identification; according to waveband reflection characteristics of glacier and non-glacier in the shadow area, determining that the blue light waveband is a shadow area glacier information identification dominantwaveband; identifying a dominant band by using glacier information in a shadow area, calculating by using an enhanced identification method to obtain an ENDSI gray scale map, selecting an appropriatethreshold according to a calculation result histogram, and segmenting the ENDSI gray scale map to obtain glacier information in the shadow area. And a dominant wave band enhanced snow cover index method is adopted, so that the glacier identification working efficiency of the overall plateau mountainous region shadow region can be improved.

Description

technical field [0001] The invention belongs to the technical field of image recognition, in particular to a method for identifying glaciers in plateau mountain shadow areas based on Landsat 8 OLI images. Background technique [0002] Glacier change is a product of climate change, and it is also a sensitive indicator of global climate change, especially plateau mountain glaciers in mid-latitude regions are extremely sensitive to climate change, and their changes have significant impact on regional climate, ecology and environment, hydrology and water resources have an important impact. Therefore, the change of mountain glaciers has always been a hot spot in geoscience research. Regardless of the response of glaciers to climate change or the impact on regional water resources, the extraction and change monitoring of mountain glaciers are the most important issues. [0003] Mountain glaciers are usually located in remote locations with complex terrain, and the cost of on-sit...

Claims

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Application Information

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IPC IPC(8): G06K9/00G06K9/62G06T7/136
CPCG06T7/136G06T2207/10032G06V20/13G06V10/758
Inventor 季漩陈云芳罗贤李运刚
Owner YUNNAN UNIV
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