| 以建成区提取为目标的Landsat8影像融合方法研究 |
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| 引用本文： | 马生清.以建成区提取为目标的Landsat8影像融合方法研究[J].地理信息世界,2018(2):78-84. |
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| 作者姓名： | 马生清 |
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| 作者单位： | 青海省第二测绘院,青海 西宁,810012 |
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| 基金项目： | 青海省第二测绘院重大科技发展基金(2015-01-02) |
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| 摘 要： | 建成区提取是城市环境监测中重要的一步,Landsat8影像广泛应用于灾害监测、城市环境监测、道路交通等领域。针对Landsat8全色影像空间分辨率高,纹理信息丰富,而多光谱影像光谱信息丰富,空间分辨率低的特点,开展以建成区提取为目标的Landsat8影像融合方法研究,探究大面积建成区提取对影像融合方法选择的影响。本文探究了Brovey变换,NNDiffusion,Gram-Schmidt(GS)法,PCA变换和小波变换(WT)等5种融合方法,利用融合影像结合"三指数法"提取建成区。结果表明:GS融合方法在光谱保持性方面具有较好的效果,各项评价指标均占优,建成区提取精度达到85.66%和83.3%。
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| 关 键 词： | Landsat8 融合方法 建成区 光谱信息 三指数法 landsat8 fusion method built-up area spectral information three index method |
Research of Fusion Methods for Landsat8 Based on Extraction of Built-up Area |
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| MA Shengqing.Research of Fusion Methods for Landsat8 Based on Extraction of Built-up Area[J].Geomatics World,2018(2):78-84. |
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| Authors: | MA Shengqing |
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| Abstract: | The built-up area land cover extraction is a key step of monitoring for urban environment. Landsat8 imagery is widely applied in disaster monitoring, urban environment monitoring and road traffic. According to the panchromatic image with high resolution and rich texture information, the multispectral imagery has rich multispectral features of landsat8 imagery. Carrying out panchromatic and multispectral image fusion study of landsat8, it is the aim to extract the built-uparea and explore the fusion methods. In this paper, the fusion algorithms of Brovey Transform, NNDiffusion, Gram-Schmidt(GS), Wavelet-Transform(WT) and PCA Transform are compared in the experiments. Carrying out experiment of built-up area land cover extraction using "three index", the results show that GS transform can keep multiple spectral information for the original image well, various factors are dominant, the accuracies of built-up area extraction are 85.66% and 83.3%. |
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