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选择北京密云水库及周边地区为实验区,在分析多源数据融合层次和各种融合方法的基础上,针对TM与SPOT5数据运用IHS变换融合法、小波变换融合法以及IHS小波变换融合法分别进行融合实验。在小波变换以及IHS小波变换融合法中,分别采用了二维连续与离散的小波变换方式,研究了小波变换层数以及低频与高频分量系数的选择结果对于融合效果的影响。最后运用主观定性以及客观定量评价方法,经对不同指标的权重计分建立详细的等级评定,对融合结果进行评判。结果表明:在所选小波方法中,二维连续2层小波效果较好,而IHS结合二维连续2层小波方法效果较为突出。
Based on the analysis of multi-source data fusion level and various fusion methods, the Miyun reservoir and the surrounding areas in Beijing are chosen as experimental areas. According to the fusion of TM and SPOT5 data using IHS transform fusion method, wavelet transform fusion method and IHS wavelet transform fusion method Fusion experiment. In the wavelet transform and the IHS wavelet transform method, two-dimensional continuous and discrete wavelet transform methods are respectively used to study the influence of the number of wavelet transform layers and the selection result of low-frequency and high-frequency component coefficients on the fusion effect. Finally, subjective qualitative and objective quantitative evaluation methods are used to establish a detailed rating system based on the weighted scores of different indicators, and the fusion results are judged. The results show that two-dimensional continuous two-layer wavelet is better in the selected wavelet method, and IHS combined with two-dimensional continuous two-layer wavelet method is more prominent.