高分二号卫星影像融合方法与效果评价
发布时间:2018-03-11 09:42
本文选题:高分二号卫星 切入点:影像融合 出处:《科学技术与工程》2017年15期 论文类型:期刊论文
【摘要】:高分二号(GF-2)是我国高分辨率对地观测系统重大专项中的首颗"亚米级"卫星,极大地提高了我国高空间分辨卫星影像的自给率。遥感影像融合是高分辨遥感处理和应用的关键流程,选择北京、大连和福州地区GF-2影像,采用彩色标准化变换(Brovey)法、相位恢复(Gram-Schmidt)法、色度空间变换(HSV)法、主成分变换(PCA)法和超分辨率贝叶斯(Pansharp)法共5种融合方法对实验区影像进行融合实验。首先对5种融合结果进行目视效果评价,然后构建了标准差、信息熵、平均梯度、相关系数和扭曲程度5个指标对融合结果进行定量评价。结果表明:Pansharp法在图像信息、细节以及光谱都具有较好的保持效果,Gram-Schmidt和PCA次之,HSV和Brovey色彩失真较明显,该结论可为GF-2卫星影像科研和工程应用提供参考。
[Abstract]:Gao Fen No. 2 (GF-2) is the first "Yami" satellite in a major project of China's high-resolution Earth observation system. Remote sensing image fusion is the key process of high-resolution remote sensing processing and application. The GF-2 images in Beijing, Dalian and Fuzhou are selected, and the color standardized transformation method is used. Phase recovery Gram-Schmidt method, chrominance space transformation (HSV) method, principal component transform (PCA) method and super-resolution Bayesian Pansharp method were used to perform fusion experiments. Then, five indexes, standard deviation, information entropy, average gradient, correlation coefficient and distortion degree, are constructed to evaluate the fusion results quantitatively. The detail and spectrum have better retention effect than Gram-Schmidt and PCA. The color distortion of HSV and Brovey is obvious. This conclusion can provide reference for the scientific research and engineering application of GF-2 satellite image.
【作者单位】: 中国科学院遥感与数字地球研究所;中国科学院大学;海南省地球观测重点实验室;三亚中科遥感研究所;福州大学地理空间信息技术国家地方联合工程研究中心空间数据挖掘与信息共享教育部重点实验室;同济大学测绘与地理信息学院;中国地质大学(武汉)李四光学院;
【基金】:国家重点研发计划全球变化及应对专项课题(2016YFA0600302) 海南省重大科技计划项目(ZDKJ2016021)和海南省重大科技计划项目(ZDKJ2016015-1)资助
【分类号】:TP751
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