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Island or reef coastline rapid obtaining method

An extraction method and island technology, which can be used in image data processing, instrumentation, computing, etc., and can solve problems such as insufficient use of color image information.

Inactive Publication Date: 2013-05-15
THE PLA INFORMATION ENG UNIV
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Problems solved by technology

[0017] The purpose of the present invention is to provide a rapid extraction method for islands and reef coastlines to solve the problem that existing extraction methods cannot make full use of color image information

Method used

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  • Island or reef coastline rapid obtaining method
  • Island or reef coastline rapid obtaining method
  • Island or reef coastline rapid obtaining method

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Embodiment Construction

[0107] The present invention will be further described in detail below in conjunction with the drawings.

[0108] Fast Extraction Method of Mean Shift Island (Reef) Shoreline Based on Pixel Marking

[0109] Since the Mean Shift algorithm is a statistical iterative method, in order to obtain higher calculation accuracy, multiple iterations are often required. Assuming that the calculation cost of each iteration of each data is O(N), therefore, the entire cluster The computational cost of the data set is O(kN 2 ), where N is the number of pixels in the image, and k is the average number of iterations for each pixel, which shows that the computational cost is quite large. In order to be able to better adapt to the extraction of coastlines, this method first performs Mean Shift iterative processing on low-resolution images, and uses the characteristics of better connectivity in the sea area to mark high-resolution images for further processing, thereby improving The speed and stabilit...

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Abstract

The invention relates to an island or reef coastline rapid obtaining method. The method includes: firstly constructing low-resolution images for raw images, conducting Mean Shift processing, obtaining the processed low-resolution images, making tags, and obtaining the coastline by a region growing method. The Mean Shift algorithm is introduced to use color information of color images to obtain island (reef) coastline effectively and lower images of noise information such as waves in the images. Coastline obtaining speed and effect are improved due to good connectivity of ocean and pixel tags. The Mean Shift algorithm is capable of making full use of the color information and suitable for coastline obtaining of remote-sensing images.

Description

Technical field [0001] The invention relates to a method for quickly extracting coastlines of islands and reefs. Background technique [0002] 1. Current state of technology [0003] Yang Qi et al. identified and extracted island information from TM data in Zhejiang waters, and achieved good results. Zhijun Liu et al. used TM fusion data and SPOT data to conduct extraction experiments on uninhabited islands and calculated the area of ​​the islands. [0004] Lee and Jurkevich used image smoothing, threshold segmentation and boundary tracking techniques to extract the coastline in the SAR image. Giancarlo et al. used the grayscale and texture of the image to segment the image to achieve the purpose of extracting the coastline. However, due to the low positioning accuracy and slow processing speed, the practicality is not good. Hongxing Liu et al. used an adaptive threshold segmentation method to accurately extract the coastline of Antarctica, which provides a benchmark for subsequen...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00
Inventor 张保明卢俊郭海涛张宏伟刘志青贺宏陈小卫徐俊峰
Owner THE PLA INFORMATION ENG UNIV
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