陆基高光谱成像用于核驱动模型测量与地物分类

doi:10.3964/j.issn.1000-0593(2023)02-0614-09

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Abstract Hyperspectral imaging technology is an advanced image acquisition technology which can not only obtain the spatial information of ground objects but also the spectral information of ground objects to obtain the three-dimensional image data of “atlas integration”. Its spectral resolution is very high, and its curve is nearly continuous. It can effectively detect ground objects that cannot be detected in multispectral imaging technology and has been widely used in target detection, ground object classification and image compression. Among them, ground object classification can distinguish different types of ground objects in images, and the classification results are the basic data of thematic mapping, which has achieved good results in military, agricultural, geological and other fields.Ground object classification refers to assigning category labels to pixels in images, that is, assigning the same labels to similar ground objects and different labels to different kinds of ground objects. According to whether the target spectral information has been obtained before classification, ground object classification can be divided into supervised classification, semi-supervised classification and unsupervised classification. However, the spectrum of ground objects is greatly affected by imaging conditions, especially for land-based imaging. The spectrum of ground objects will change to a certain extent under different imaging conditions and is no longer strictly unique so that it cannot be accurately classified according to the spectral data of ground objects under unknown imaging conditions. However, the scattering ratio coefficient of the same ground object is unique, has nothing to do with imaging conditions or detection direction, is not affected by the characteristics of bidirectional reflection, and is only related to the type of ground object. It is a physical quantity reflecting the essential attributes of ground objects, so it can be used as the basis for classifying them. In this paper, the scattering of various ground objects are measured under ground-based imaging conditions, the measurement process of scattering weights is described in detail and the fitting ability of the kernel-driven model is verified. Through comparison, it is found that the scattering coefficients of different ground objects have great differences, and then the method of using scattering coefficients to classify ground objects is put forward.In this paper, two sets of data are used to verify the classification method, and three similarity measures, including projection, distance and amount of information, are used to measure the classification results quantitatively.The experimental results show that the scattering coefficients of the same ground object are almost the same, which has nothing to do with the imaging conditions but only with the type of ground object. The scattering coefficients of different ground objects are different, and using scattering coefficients can effectively achieve the classification of ground objects, and good results have been achieved.

Key words：Hyperspectral imaging; Land-based conditions; Scattering coefficients; Ground object classification; Similarity measurement

Received: 2021-10-14 Accepted: 2022-05-25

ZTFLH:

TP751.1

Corresponding Authors: ZHOU Bing E-mail: zhbgxgc@163.com

Cite this article:

WANG Qiang-hui,SHEN Xue-ju,ZHOU Bing, et al. Land-Based Hyperspectral Imaging and Core Drive Model for Ground Object Classification[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(02): 614-622.

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https://www.gpxygpfx.com/EN/10.3964/j.issn.1000-0593(2023)02-0614-09 OR https://www.gpxygpfx.com/EN/Y2023/V43/I02/614