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In this paper, a pan-sharpening method, using non-subsampled contourlet transform (NSCT) and the theory of compressive sensing (CS), is proposed. The NSCT is used for sparse image representation to perform a multiscale and directional decomposition of source images in order to express their detail and express the sparsity of their high frequency. The CS is used to merge the multispectral (MS) and panchromatic (pan) images from partial random measurements. Two different fusion rules are then applied. The final pan-sharpened image is obtained by inverse NSCT. Experimental results show the efficiency of the proposed method, compared with pan sharpening based on standard NSCT, in terms of visual quality and objective assessment. Moreover, the proposed technique is very effective when the storage and transmission bandwidth are limited. 相似文献
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IKONOS图像的线性回归波段拟合融合方法 总被引:3,自引:0,他引:3
讨论基于线性回归波段拟合的空间细节信息提取方法的可行性。首先通过全色与多光谱图像构造线性回归方程,根据全色图像的高频成分设置最小二乘求解的权系数,然后利用回归系数构造低分辨率的全色图像,提取空间细节信息,最后将空间细节注入多光谱图像中进行融合。通过IKONOS全色和多光谱图像的融合实验,比较了本文方法与基于光谱响应函数的方法,结果表明:采用本文方法提取的空间细节信息进行融合,能达到甚至超过基于光谱响应函数方法的融合质量;相对于与FastIHS融合方法,本文方法的融合质量也有较大的提高。 相似文献
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Optical remote sensing satellites obtain MS and Pan images simultaneously over the same coverage area. Remote sensing and image processing communities are working on different pan-sharpening methods capable of taking advantage of MS and Pan images. Each remote sensing system has its own advantages and disadvantages, leading to the question ‘Which pan-sharpening method should be used for which type of imagery?’ The aim of this research is to investigate the pan-sharpening performance of PLÉIADES-1A images. For this purpose, pan-sharpened images were generated using PCA, IHS and Brovey Transform which are the most popular pan-sharpening methods. Then, the pan-sharpened images were evaluated quantitatively using Correlation Coefficient, Root Mean Square Error, Relative Average Spectral Error, Spectral Angle Mapper and Erreur Relative Globale Adimensionnelle de Synthése. In addition, pan-sharpened images were evaluated qualitatively by taking object availability and completeness into consideration. 相似文献
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