A method and apparatus for extracting cream and salt information from remote sensing image

Abstract

The invention provides a method and a device for extracting paste salt information from remote sensing images. The method comprises the following steps: 1, obtaining remote sensing image data and processing to form basic data by using a mask technology; 2, carrying out histogram calculation processing on the basic data in the selected area to determine the selected data, extracting the abnormal information of the groups from the selected data by adopting the first-order orthogonal transformation method, and cutting and checking the abnormal information; 3, obtaining the abnormal information ofgypsum salt on the basis of the abnormal information of the group and the multi-stage driving orthogonal transformation iterative technology, to judge and process the abnormal information of the gypsum salt so as to meet the calibration requirements, and then to cut and output the abnormal information of the gypsum salt. The method can obtain more accurate gypsum-salt anomaly information and restrain non-gypsum-salt anomaly information, which is favorable for faster and more accurate selection of prospecting target area, and can save time and manpower and material resources for mineral resources investigation.

Description

technical field [0001] The invention relates to the field of geological exploration, in particular to a method and device for extracting gypsum-salt information from remote sensing images. Background technique [0002] Alteration remote sensing anomaly information is quantified and extracted from remote sensing data by mathematical means, and is used to characterize the indication information of near-mine alteration rocks that may be most related to mineralization. At present, the alteration remote sensing anomalies in many literatures mainly include altered minerals and their combination information including electronic anomalies (original iron staining anomalies) and group anomalies (original hydroxyl anomalies and carbonates). The sign of ore has its geological and spectral basis, and has been proved and widely used in practice. [0003] The formation process of ore deposits is a gradual enrichment process of some useful elements, and this metallogenic material is usuall...

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Problems solved by technology

[0005] In order to solve the problem that the abnormal information of gypsum salt is hidden in the various information of hydroxyl and carbonate anomalies in the prior art when the abnormal information of mineralization and alteration is used to extract the abnormal information, which leads to difficulties in extraction and limited application, the present invention provides a remote sensing image paste Salt information extraction method, which uses multi-pole driven orthogonal transformation iterative technology for information extraction, realizes the separation of gypsum and salt information on the basis of hydroxyl and carbonate anomalies, and the extracted anomalies have good results

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