Method for removing envelope line of field rock mineral spectrum

Abstract

The invention belongs to the technical field of spectrum treatment and analysis and specifically discloses a method for removing an envelope line of a field rock mineral spectrum. The method comprises the following steps: 1) performing spectrum water-vapor absorption treatment on a field rock mineral spectrum data; 2) performing spectrum environmental noise treatment on the field rock mineral spectrum; 3) positioning a maximum demarcation point of the field rock mineral spectrum treated in steps 1 and 2); 4) calculating and searching envelope line nodes of a field rock mineral spectrum curve S acquired in the step 3); 5) generating an envelope line according to the envelope line nodes of the field rock mineral spectrum curve S acquired in the step 4); and 6) removing an envelope line Se of the rock mineral spectrum curve acquired in the step 5). According to the method, the phenomena of the envelope line wrapped by the spectrum curve and the leakage of the envelope line nodes can be effectively avoided.

Description

technical field [0001] The invention belongs to the technical field of spectral processing and analysis, and in particular relates to a method for removing envelopes of field rock mineral spectra. Background technique [0002] Hyperspectral remote sensing imaging technology has the characteristics of high spatial, high spectral resolution and map-spectrum integration. Hundreds of continuous spectral bands can finely describe the characteristics of ground features, which can reflect the types of ground features and rock mineral types. Its uniqueness has been successfully applied in many fields such as geology, soil, vegetation ecological environment and ocean, among which, the application in the field of geology (lithology classification, mineral identification, etc.) is the most successful. [0003] The identification and classification of rock minerals in hyperspectral images is based on a full understanding of the measured rock mineral spectral characteristics. Laboratory ...

AI Technical Summary

Problems solved by technology

[0005] In practical applications, for the rock and mineral spectra measured in the complex environment in the field, the commonly used envelope algorithm has certain defects (such as the envelope algorithm in ENVI): it does not consider the first and last points and nearby points as envelope nodes. In some cases, there is a phenomenon that the envelope is surrounded by the spectral curve; without considering the existence of envelope nodes between the extreme points, it is easy to miss the envelope nodes between the extreme points, resulting in the envelope and the spectral curve intersect

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