以水体为观测目标的Worldview-2融合方法评价  

Evaluation of fusion methods for Worldview-2 aiming to water body observation

作　　者：杜泳[1] 张霄宇[1] 黄大松[1] 江彬彬[1] 陈建裕[2] 邓涵[1] 姚玲玲[1] 杨顶田[3] 

机构地区：[1]浙江大学地球科学系,浙江杭州310027 [2]国家海洋局第二海洋研究所卫星海洋环境动力学国家重点实验室,浙江杭州310012 [3]中国科学院南海海洋研究所,热带海洋环境国家重点实验室,广东广州510301

出　　处：《浙江大学学报（工学版）》2015年第5期993-1000,共8页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(40706057,41376184);浙江大学海洋学科交叉研究引导基金资助项目(2012HY006A);浙江省环保科技计划资助项目(2013A021);浙江省教育厅资助项目(Y201430393);国家自然科学海峡两岸联合基金(U1405234)

摘　　要：为了提高影像的分辨率、强化影像隐含的信息,在影像的预处理过程中往往需要将不同分辨率数据进行融合,实现优势互补.以Worldview-2的3景遥感影像为数据源,钱塘江重点河段为研究对象,对以水体悬浮泥沙为主要观测目标的遥感影像开展融合方法的评价,以及大面积水域对影像融合方法选择的影响机制的探讨.结果表明,大面积水体的存在会影响到融合影像保留源图像光谱信息的能力,影响了最佳融合方法的选择,Gram-Schmidt是最合适本次研究3幅影像的融合方法.经Gram-Schmidt融合后的影像能获取到更加详细的悬浮泥沙运移信息.The remote sensing data with different spatial resolutions were fused to construct images. In this study, three Worldview--2 images were used to investigate the concentration of suspended sediment in segments of Qiantang River. The fused effects were assessed and impacts from large area of water were an- alyzed. The results indicate that the large area of water affects the ability of fused image including the spectral information of original image. The size of water area in the remote sensing image is an important factor for selecting optimal fusing method. Gram-Schmidt is the ideal fusing method in this study. The detailed information of suspended sediment transport is constructed using the fused image.

关 键 词：Worldview-2影像 水体 融合方法 悬浮泥沙浓度 

分 类 号：P237[天文地球—摄影测量与遥感]