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arXiv 1603.08720cs.CV
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基于光谱分解的多波段图像融合

Multi-Band Image Fusion Based on Spectral Unmixing

University of Cambridge(剑桥大学);Instituto de Telecomunicações(电信研究所);Instituto Superior Técnico(高等技术学院);Universidade de Lisboa(里斯本大学);IRIT/INP-ENSEEIHT(图卢兹国立高等电子技术、电子、计算机、水力学与电信学院);University of Toulouse(图卢兹大学);Nanyang Technological University(南洋理工大学)

Qi Wei, Jose Bioucas-Dias, Nicolas Dobigeon, Jean-Yves Tourneret, Marcus Chen, Simon Godsill

摘要:

提出了一种基于非监督光谱分解的多波段图像融合算法,将高空间分辨率的低光谱分辨率图像与低空间分辨率的高光谱分辨率图像进行融合。将广泛使用的线性观测模型(加性高斯噪声)与线性光谱混合模型相结合,形成观测值的似然。引入丰度的固有物理性质所产生的非负性和和对一的约束作为先验信息来正则化这个不适定问题。然后将联合融合和解混问题表示为最大化关于端元签名和丰度图的联合后验分布,该优化问题用交替优化策略进行攻击。由此产生的两个子问题是凸的,并有效地解决了交替方向的乘法器。实验进行了合成和半真实的数据。仿真结果表明,提出的基于解混的融合方案提高了丰度和端元估计的最先进的联合融合和解混算法相比。

英文摘要:

This paper presents a multi-band image fusion algorithm based on unsupervised spectral unmixing for combining a high-spatial low-spectral resolution image and a low-spatial high-spectral resolution image. The widely used linear observation model (with additive Gaussian noise) is combined with the linear spectral mixture model to form the likelihoods of the observations. The non-negativity and sum-to-one constraints resulting from the intrinsic physical properties of the abundances are introduced as prior information to regularize this ill-posed problem. The joint fusion and unmixing problem is then formulated as maximizing the joint posterior distribution with respect to the endmember signatures and abundance maps, This optimization problem is attacked with an alternating optimization strategy. The two resulting sub-problems are convex and are solved efficiently using the alternating direction method of multipliers. Experiments are conducted for both synthetic and semi-real data. Simulation results show that the proposed unmixing based fusion scheme improves both the abundance and endmember estimation comparing with the state-of-the-art joint fusion and unmixing algorithms.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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