A method and device for space-spectrum classification of hyperspectral images taking into account the importance of spectra

A classification method and important technology, applied in the field of hyperspectral remote sensing image processing, can solve the problem of lack of ground object-sensitive spectral information learning mechanism, maintain local detail information, suppress classification noise, etc., and achieve high-dimensional data processing capability and noise robustness. The effect of strong stickiness, improved distinguishability, and improved classification effect

CN110796163BActive Publication Date: 2021-03-19CHINA UNIV OF GEOSCIENCES (WUHAN)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2021-03-19

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Abstract

The invention discloses a hyperspectral image spatial spectrum classification method and device considering the importance of spectrum. For a given hyperspectral remote sensing image with hundreds of spectral bands, the importance of spectral features is calculated through random forest; the spectral weight feature can be customized The kernel function uses the extracted spectral feature weights to model the relative role of each spectral band in the classification, giving greater weight to the bands that are more beneficial to the identification of feature categories, and increasing the spectral discrimination ability of features; in the conditional random field Construct spectral unary potential energy and spatial binary potential energy under a unified framework, consider spectral feature weight in spectral unary potential energy, integrate spectral weight kernel function to improve the ability to distinguish different spectral features in nonlinear space, and model through spatial binary potential energy Spatial correlation of ground objects. The beneficial effects of implementing the present invention are: the influence of unimportant bands on classification is reduced, the distinguishability of categories is improved, and the classification effect is improved.
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Description

technical field

[0001] The invention belongs to the field of hyperspectral remote sensing image processing, and in particular relates to a hyperspectral image spatial spectrum classification method and device taking into account the importance of the spectrum. Background technique

[0002] Hyperspectral remote sensing images have the unique advantages of high spectral resolution and map-spectrum integration, which can provide diagnostic spectral features of different ground objects, and are an important data source for classification and recognition of ground objects. In recent years, with the rapid development of hyperspectral technology, hyperspectral remote sensing images with high spatial resolution (double high remote sensing images) have begun to emerge, such as the domestic Tiangong-1 satellite, aviation ROSIS, CASI, and drones. The spatial resolution of hyperspectral imagery has reached meter level, or even submeter level. This kind of hyperspectral image with high ...

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Embodiment Construction

[0047] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0048] refer to figure 1 , which is a flow chart of the hyperspectral image spatial spectral classification method in consideration of spectral importance provided by the present invention. According to the core points realized by the hyperspectral image spatial spectral classification method of the present invention, the main implementation of the present invention is divided into Follow the steps below:

[0049] Step 1: Spectral Band Importance Extraction

[0050] Step 2: Custom Spectral Weight Kernel

[0051] Step 3: Conditional Random Field Framework Construction

[0052] The specific implementation of step 1 includes the following sub-steps,

[0053] In step 1.1, the random forest algorithm is used to judge the...