自适应高斯滤波与SFIM模型相结合的全色多光谱影像融合方法

全色-多光谱影像融合技术可以显著提高遥感影像的地物判别能力,但是空间信息融入度与光谱信息保真度是相互矛盾的一组性质,一般方法往往无法平衡这两方面。SFIM算法具有良好的光谱信息保持能力,但是其空间信息融入度较差,影响了整体的融合效果。为此,本文分析了SFIM模型的原理与特点,提出一种自适应高斯滤波与SFIM模型相结合的全色多光谱影像融合方法（AGSFIM）。以均值调整后的多光谱整体平均梯度为标准来计算高斯滤波的最优参数,将下采样全色影像的清晰度调整至同样水平,以保证融合结果的空间信息融入度与光谱信息保真度之间的平衡。利用6种融合算法对＂北京二号＂（Beijing-2）、＂资源三号＂02星（ZY...

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Bibliographic Details
Published in测绘学报 Vol. 47; no. 1; pp. 82 - 90
Main Author 王密;何鲁晓;程宇峰;常学立
Format Journal Article
LanguageChinese
Published 武汉大学测绘遥感信息工程国家重点实验室,湖北武汉,430079%武汉大学资源与环境科学学院,湖北武汉,430079 2018
Subjects
SFIM模型
影像融合
自适应
高斯滤波
adaptive
Gaussian filter
自适应
image fusion
SFIM model
高斯滤波
影像融合
SFIM模型
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ISSN1001-1595
DOI10.11947/j.AGCS.2018.20170421

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Summary:全色-多光谱影像融合技术可以显著提高遥感影像的地物判别能力,但是空间信息融入度与光谱信息保真度是相互矛盾的一组性质,一般方法往往无法平衡这两方面。SFIM算法具有良好的光谱信息保持能力,但是其空间信息融入度较差,影响了整体的融合效果。为此,本文分析了SFIM模型的原理与特点,提出一种自适应高斯滤波与SFIM模型相结合的全色多光谱影像融合方法（AGSFIM）。以均值调整后的多光谱整体平均梯度为标准来计算高斯滤波的最优参数,将下采样全色影像的清晰度调整至同样水平,以保证融合结果的空间信息融入度与光谱信息保真度之间的平衡。利用6种融合算法对＂北京二号＂（Beijing-2）、＂资源三号＂02星（ZY-3 02）数据进行对比试验,表明在良好的光谱保持能力的前提下,改进方法可以有效克服SFIM算法空间信息融入不足的缺点。
Bibliography:11-2089/P
adaptive;Gaussian filter;image fusion;SFIM model
Panchromatic and multi-spectral fusion technology can increase feature discriminant ability of remote sensing images.However,the abilities of fusing spatial information and keeping spectral information are conflict,and are hard to be balanced by common algorithms.SFIM（smoothing filter-based intensity modulation）can keep spectral information effectively,but is difficult to fuse spatial information which will reduces the holistic effect.Pointing to this problem,this paper analyzes the principles and characters of SFIM model,and proposes a fusion method combined with adaptive Gaussian filter and SFIM model（AGSFIM）.Computing optimal parameter of Gaussian filter based on entirety mean-value-adjusted average gradient of multi-spectral bands,and adjusting down-sampled panchromatic image to same sharpness level which can confirm the balances of spatial information fusing ability and spectral information keeping ability.Beijing-2 and ZY-3 02 data are applied to
ISSN:1001-1595
DOI:10.11947/j.AGCS.2018.20170421