| ETM+全色波段及其多光谱波段图像的融合应用 |
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| 引用本文： | 许榕峰,徐涵秋.ETM+全色波段及其多光谱波段图像的融合应用[J].地球信息科学,2004,6(1):99-103,119. |
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| 作者姓名： | 许榕峰 徐涵秋 |
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| 作者单位： | 福州大学环境与资源工程系,福州,350002;福州大学环境与资源工程系,福州,350002 |
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| 基金项目： | 国家教育部骨干教师专项资助项目. |
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| 摘 要： | Landsat-7ETM+的全色波段与多光谱波段有相同的太阳高度角和其他环境条件,影像获取时间一致,两种不同分辨率的数据可以不经配准而实现高精度融合。目前常用的图像融合方法很多,究竟哪种方法更适合于ETM+图像,本次试验采用HIS变换、Brovey变换、SFIM变换、加权融合4种方法,分别实现ETM+Pan与ETM+的多光谱波段的融合,并从空间纹理信息、光谱真实性2个方面进行定量和定性地评价。研究表明,从综合角度出发,基于SFIM变换的融合方法产生的光谱扭曲和失真较小,同时很大程度地保持了高分辨率的全色波段的空间纹理细节信息,是一种适合于ETM+图像融合的较佳方法。
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| 关 键 词： | Landsat-7 ETM+ 全色波段 多光谱波段 图像融合 |
| 收稿时间： | 2003-06-26 |
| 修稿时间： | 2003年6月26日 |
Evaluation on Image Fusion Algorithms of Landsat-7 ETM PAN Band and Multispectral Bands |
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| XU Rongfeng,XU Hanqiu.Evaluation on Image Fusion Algorithms of Landsat-7 ETM PAN Band and Multispectral Bands[J].Geo-information Science,2004,6(1):99-103,119. |
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| Authors: | XU Rongfeng XU Hanqiu |
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| Institution: | Department of Environment & Resources Engineering, Fuzhou University, Fuzhou, Fujian 350002, China |
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| Abstract: | The Landsat-7 ETM+ Panchromatic band is taken simultaneously with multispectral bands using the same sensor system. The solar illumination and other environmental conditions are identical. They are received at the same time. The two data sets, therefore, can achieve the best fusion result without coregistration. Now there are many image fusion algorithms. Four fusion algorithms are applied to the data fusion between Landsat-7 ETM+ PAN band and multispectral bands respectively to determine which one is the best suitable methods for ETM+ image. The four fusion algorithms include HIS transformation, Brovey transformation, SFIM transformation and Weighting fusion. The result of different merging methods are evaluated qualitatively and quantitatively by comparison with the spectral fidelity and the spatial texture information. The study indicates that Smoothing Filter-Based Intensity Modulation (SFIM) is very fit for fusion with ETM+ images on the whole. SFIM technique distorts the spectral quality slightly, and at the same time improves the spatial resolution apparently. |
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| Keywords: | landsat-7 ETM+ panchromatic band multispectral bands image fusion |
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