Alteration extraction method for imaging high-spectral boring rock core data

Abstract

The invention discloses an alteration extraction method for imaging high-spectral boring rock core data, and belongs to the field of high-spectral remote sensing application. The method comprises that a reference whiteboard and a rock core sample to be scanned are placed; the whiteboard and a rock core are scanned via a high spectrum, and original imaging high-spectral data is obtained; the original imaging high-spectral data is preprocessed to obtain imaging high-spectral reflectivity data; the format of the imaging high-spectral reflectivity data is converted to obtain data of a BIP format; the format of the BIP data is further converted to obtain ENVI Spectral Library data; spectral analysis is carried out on the ENVI Spectral Library data via software The Spectral Geologist, and an alteration analysis result is obtained; and format conversion is carried out on the alteration analysis result to obtain an alteration extracted image. The method can be used to extract imaging high-spectral rock core scanning data automatically.

Description

technical field

[0001] The invention belongs to the application field of hyperspectral remote sensing, and in particular relates to a method for extracting alteration of imaging hyperspectral drilling core data. Background technique

[0002] Hyperspectral core drilling scanning and alteration extraction are important means to grasp deep fluid activities, and have been widely used in the field of mineralization prediction. Traditional hyperspectral core scanning can only provide true-color pictures and limited spectral information, while imaging hyperspectral scanning realizes the scanning of images and spectra in one, and each pixel contains a spectral curve, which greatly improves the accuracy of alteration extraction. improve. At present, there are many methods for image hyperspectral core alteration extraction, but the interference of expert consciousness is serious. The Spectral Geologist software compiled by the Australian Commonwealth Science and Industry Organizatio...