Analysis of GeoTag Fields in GeoTiff
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摘要: 基于Mallat小波算法的影像融合, 由于存在抽取和插值运算, 其结果存在一定的相位失真.Trous小波算法通过有限滤波器内插近似, 实现对影像数据的无抽取离散小波变换, 较好地解决了上述问题.在阐述影像数据融合原理的基础上, 给出了基于Trous小波变换的影像融合处理方法和过程.通过对遥感影像数据融合结果的定性定量分析, 认为基于Trous小波的遥感影像数据融合方法, 能保持参与融合影像的信息特征, 从而获得较好的融合处理结果.Abstract: Wavelet transform is widely used in image fusion with its good features. But the algorithm based on Mallat has a major disadvantage for it contains interpolation and decimation. The new Trous algorithm, formed by convolving with an increasingly dilated Wavelet function, doesn't have the procedure of interpolation and decimation, and so it can solve the problem. This article firstly introduce representation of information and algorithms and applications of fusion and emphasize the algorithm based on Trous Wavelet transform. In the end, it indicate that visual effects, average gradient and standard deviation could implement the image quality evaluations after fusion. The results show that the images after fusion can keep the information of the raw image.
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Key words:
- Wavelet transform /
- Trous Wavelet /
- image fusion /
- remote sensing imagery
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图 1 SPOT影像与TM影像融合结果
a.TM原始影像; b.融合结果
Fig. 1. Fusion results of SPOT imagery and TM imagery
表 1 影像信息统计值
Table 1. Information statistics of image
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[1] 陆关祥, 周鼎武, 王居里, 等. 复杂结构构造区遥感图像的地质信息提取方法——基于小波变换的多层次图像分割[J]. 地球科学——中国地质大学学报, 2002, 27(1): 50-54. https://www.cnki.com.cn/Article/CJFDTOTAL-DQKX200201010.htmLU G X, ZHOU D W, WANG J L, et al. Geological information extracting from remote sensing image in complex area: based on Wavelet analysis for automatic image segmentation[J]. Earth Science—Journal of China University of Geosciences, 2002, 27(1): 50-54. https://www.cnki.com.cn/Article/CJFDTOTAL-DQKX200201010.htm [2] 陈建国, 夏庆霖. 利用小波分析提取深层次物化探异常信息[J]. 地球科学——中国地质大学学报, 1999, 24(5): 509-511. doi: 10.3321/j.issn:1000-2383.1999.05.017 CHEN J G, XIA Q L. Wavelet-based extraction of geophysical and geochemical anomaly imformation[J]. Earth Science—Journal of China University of Geosciences, 1999, 24(5): 509-511. doi: 10.3321/j.issn:1000-2383.1999.05.017 [3] Starck J L, Murtagh F, Bijaoui A. Multiresolution and astronomical image processing [A]. Astronomical data analysis software and system IV ASP conference series[C]. [s. l. ]: [s. n. ], 1995.77. [4] 孙加柄, 刘继琳, 李军. 多源遥感影像融合[J]. 遥感学报, 1998, 2(1): 47-50. https://www.cnki.com.cn/Article/CJFDTOTAL-CJLY201610014.htmSUN J B, LIU J L, LI J. Multi-source remote sensing image data fusion[J]. Journal of Remote Sensing, 1998, 2(1): 47-50. https://www.cnki.com.cn/Article/CJFDTOTAL-CJLY201610014.htm -
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