Coastal culture pond extraction method based on spatial similarity and corrected salt pan index

Abstract

The invention provides a coast culture pond extraction method based on spatial similarity and a corrected salt pan index, and the method comprises the steps: obtaining Landsat-8 image data, and carrying out preprocessing of the Landsat-8 image data; performing strip-shaped water body positioning on the preprocessed image so as to obtain coastal zone water body image data, and extracting crystallizing pond area image data of a salt pan based on spectral difference of a crystallizing pond and a culture pond and strip-shaped texture features of the crystallizing pond; extracting reservoir area image data based on spatial distribution features of a reservoir and the crystallizing pond; and removing the crystallizing pond area image data and the reservoir area image data from the coastal zone water body image data so as to obtain culture pond area image information. According to the method, the salt pan-containing coastal zone culture pond of a multispectral image under the medium resolution can be effectively extracted.

Description

technical field [0001] The invention relates to the technical field of remote sensing image processing, in particular to a method for extracting coastal aquaculture ponds based on spatial similarity and modified salt pan index. Background technique [0002] In the early days, multispectral images were used to extract coastal culture ponds, and visual interpretation was generally used. By manually drawing the coastal zone culture ponds, the extraction results have high accuracy, but it is time-consuming and laborious, and it is impossible to automatically extract large-scale culture ponds. Compared with visual interpretation, the exponential method can effectively improve the extraction efficiency because of its simple operation. The main idea is to construct a spectral index through the spectral values ​​between different bands, thereby suppressing the background features while enhancing the target features. This index is suitable for situations with large spectral differen...

AI Technical Summary

Problems solved by technology

[0004] At present, there are still the following problems in the extraction of coastal aquaculture ponds: 1. The low resolution of medium-resolution images makes the dams of aquaculture ponds only one to two pixels wide, and are often glued together with adjacent aquaculture ponds and are difficult to remove effectively

2. The presence of salt pans with similar spectra and locations makes effective extraction of coastal culture ponds a challenging issue

Images