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Method for identifying hematitization based on hyperspectral data

A data recognition and hyperspectral technology, which is applied in character and pattern recognition, instruments, computer parts, etc., can solve the problems of easy introduction of noise, difficulty in accurately distinguishing and identifying hematite and limonite, and unclear physical meaning, etc. problem, to achieve the effect of signal-to-noise separation, lower detection limit, and optimize the amount of information

Active Publication Date: 2014-08-13
BEIJING RES INST OF URANIUM GEOLOGY
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Problems solved by technology

In short, the common defects of these methods are: the physical meaning is not clear, and it is easy to introduce noise. The most fundamental defect is that it is difficult to accurately distinguish and identify hematite and limonite. Therefore, it is necessary to develop a new method for the identification of hematite. method

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  • Method for identifying hematitization based on hyperspectral data

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Embodiment Construction

[0018] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0019] Such as figure 1 As shown, a method for identifying hematite mineralization based on hyperspectral data, the method includes the following steps:

[0020] Step (1) Obtain hyperspectral image data and preprocessing

[0021] Use airborne or spaceborne imaging spectrometers to obtain hyperspectral image data. The spectral range of imaging spectrometers covers at least the visible light-near-infrared band, such as airborne Casi, Hymap, spaceborne Hyperion and other sensors. The time of air flight or satellite transit is at or near noon. At noon, the weather was clear and cloudless.

[0022] Use ENVI software to preprocess the hyperspectral image data, preprocessing includes radiometric correction, geometric correction, image cropping, image masking, etc., and perform atmospheric correction and spectral reconstruction on the hyperspectral ...

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Abstract

The invention belongs to a method for identifying hematitization, and particularly discloses a method for identifying hematitization based on hyperspectral data. The method for identifying hematitization based on the hyperspectral data comprises the following steps that (1) hyperspectral image data are obtained and preprocessed; (2) a feature wave band of the hyperspectral image data is selected; (3) an image end member of the feature wave band of the hyperspectral data is extracted; (4) a spectral feature identification rule is built to distinguish and identify a hematitization end member and a ferritization end member; (5) map plotting is carried out on the hematitization end member and the ferritization end member through a mixed coordinate matching filtering method. By means of the method for identifying hematitization based on the hyperspectral data, hematitization and ferritization can be identified, the identification accuracy is high, and the detection limit of minerals is low.

Description

technical field [0001] The invention belongs to a method for identifying hematite mineralization, in particular to a method for identifying hematite mineralization based on hyperspectral data. Background technique [0002] Hematite mineralization, also known as red alteration, is one of the special signs for searching for medium- and low-temperature hydrothermal uranium deposits. It is also often found in other medium- and low-temperature copper and gold deposits, and is an important ore-forming element. Therefore, how to accurately identify and extract the distribution of hematite mineralization, which is closely related to mineralization, has important practical significance for delineating metallogenic targets. At present, in the field of remote sensing alteration information extraction, the extraction of iron-stained information has been carried out for many years, and the development has been relatively mature, but there are few cases of further distinguishing iron-stai...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/62
Inventor 张川叶发旺刘洪成
Owner BEIJING RES INST OF URANIUM GEOLOGY
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