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A hyperspectral image endmember extraction algorithm based on generalized morphology

Optoelectronics Letters 2014年第5期10卷 387-390页

作者：王东辉杨秀坤赵岩 College of Information and Communication Engineering Harbin Engineering University Electric and Control Engineering College Heilongjiang University of Science and Technology

Generalized morphological operator can generate less statistical bias in the output than classical morphological operator. Comprehensive utilization of spectral and spatial information of pixels, an endmember extraction algorithm based on generalized morphology is proposed. For the limitations of morphological operator in the pixel arrangement rule and replacement criteria, the reference pixel is introduced. In order to avoid the cross substitution phenomenon at the boundary of different object categories in the image, an endmember is extracted by calculating the generalized opening-closing(GOC) operator which uses the modified energy function as a distance measure. The algorithm is verified by using simulated data and real data. Experimental results show that the proposed algorithm can extract endmember automatically without prior knowledge and achieve relatively high extraction accuracy.

关键词： Extraction Morphology Pixels Spectroscopy Comprehensive utilizations Endmember extraction algorithms Extraction accuracy Generalized morphological operators Hyper spectral images Morphological operator Object categories Spatial informations

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About Some Aspects of Use of Optical Sensors for Monitoring the Aquatic Environment

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Journal of Environmental & Earth Sciences 2024年第1期6卷 1-10页

作者： Ferdenant Mkrtchyan Vladimiir Soldatov Maxim Mkrtchyan Kotelnikov Institute of Radioengineering&Electronics RAS Fryazino BranchVvedensky Sq.1FryazinoMoscow141190Russia

Multi-channel polarization optical technology is increasingly used for prompt monitoring of water *** devices during the assessment of water quality determine the intensity of light through the studied aquatic *** devices measure the spectrum of weakening of light through the aquatic *** devices receive spectra in vertical and horizontal *** presented article develops an adaptive optical hardware and image system for monitoring water *** system is *** consists of 2 parts:1)automated spectrophotometer-refractometer,and 2)adaptive *** system is equipped with a corresponding algorithmic and software,including algorithms for identifying spectral curves,databases and knowledge of spectral curves algorithms for solving reverse *** presented system is original since it differs from modern foreign systems by a new method of spectrophotometric and spectroellipsometric measurements,an original elemental base of polarization optics and a comprehensive mathematical approach to assessing the quality of a water *** are no rotating polarization elements in the ***,this makes it possible to increase the signal-to-noise ratio and,as a result,improve measurement stability and simplify multichannel spectrophotometers and *** proposed system can be used in various water systems where it is necessary to assess water quality or identify the presence of a certain set of chemical elements.

关键词： Monitoring Aquatic environment Polarization optics Water object Pollutants spectral images Classification Identification

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