Remote sensing identification method of polar iceberg based on double bubbling method

A double bubbling method and remote sensing identification technology, applied in the field of remote sensing geoscience applications, can solve the problems of inability to accurately identify icebergs, unable to obtain reliable iceberg area and linear size, etc., and achieve the effect of simple method, high precision and simple operation steps.

Active Publication Date: 2020-10-02
NANJING UNIV
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a polar iceberg remote sensing identification method based on the double bubbling method, which can quickly and efficiently Accurately obtain the iceberg boundary in units of pixels from the image, and then obtain information such as iceberg area and linear size, and complete the precise identification of icebergs

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  • Remote sensing identification method of polar iceberg based on double bubbling method
  • Remote sensing identification method of polar iceberg based on double bubbling method
  • Remote sensing identification method of polar iceberg based on double bubbling method

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Embodiment Construction

[0039] The image data of this example is the Sentinel-1A SAR image, downloaded from the ASF website (https: / / vertex.daac.asf.alaska.edu / ) for free, the geographical coordinates of the image center are S 77°, W 38°, and the time is 2016 November 29.

[0040] Such as figure 1 The flow chart of this example, the specific implementation steps of the iceberg identification method include the following: the first step, download the Sentinel-1A SAR images in November and December (summer in the southern hemisphere). The image location is generally the sea area on the edge of the Antarctic continent.

[0041] The second step is to crop the original remote sensing image, and only keep the suspected iceberg part. Use ENVI software to read the cropped remote sensing images, and perform preprocessing such as mean filtering to eliminate noise. And through manual identification and MATLAB data extraction to determine the number of icebergs less than 10 pixels, use the assignment method t...

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Abstract

The invention discloses a polar iceberg remote sensing recognition method based on a double bubbling method, by preprocessing the Sentinel‑1A satellite image, removing image noise; using a detector in MATLAB to detect the iceberg edge area; assigning a value to the image to remove the image Stripe noise existing in the background sea area; the maximum value of each pixel group in each row of the image is obtained by the double bubbling method, that is, the boundary pixel of the iceberg row; the pixels between the boundary pixels of the iceberg row are filled; the filled The boundary of the iceberg is extracted, and finally the iceberg boundary in units of pixels can be obtained, and then the iceberg can be identified. Based on this, information such as iceberg area and linear size can be calculated, which improves the accuracy of iceberg identification.

Description

technical field [0001] The invention relates to a polar iceberg remote sensing recognition method based on a double bubbling method, and belongs to the technical field of remote sensing geoscience applications. [0002] technical background [0003] Icebergs play an important role in revealing changes in Antarctic climate and marine environmental conditions in recent years. Accurate positioning of the iceberg boundary is the first condition to obtain information such as iceberg area and linear size. Obtaining the iceberg boundary is of great significance for the study of iceberg melting, production rate and ocean current movement. [0004] The ship-based observation method is limited by factors such as time and distance, and has great limitations. It can only provide a small amount of information such as the area and linear size of icebergs. The ship-based iceberg identification method has the advantage of identifying multiple icebergs at the same time, but because it cannot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00G06T7/12G06T7/181G06K9/00
CPCG06T5/002G06T7/12G06T7/181G06T2207/30181G06T2207/20021G06T2207/20024G06T2207/10032G06V20/13
Inventor 柯长青舒苏李海丽王蔓蔓
Owner NANJING UNIV
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