ENVISAT ASAR数据与CBERS-02数据的融合与应用

本文首次利用ENVISAT ASAR交叉极化模式数据与中巴地球资源卫星02星(CBERS 02)CCD数据进行融合,对融合后的图像进行分析和讨论。通过对IHS变换融合、主成分分析融合和小波变换融合比较分析发现,采用IHS变换融合具有更好的目视判读效果,但是由于ASAR数据受到相干斑噪声的影响,在滤波去噪后,使融合图的空间分辨率变低。另外,该融合图包含了地物的VV极化和HH极化后向散射特征,使地物结构形态、复介电常数和地物的光谱信息等重要的地物参数信息都包含在融合图中,增强了区别地物的能力,就农作物的目视解译和分类而言,精度得到了较大的提高。

Application and Investigation of the Fusion of ENVISAT ASAR and CBERS-02 Image Data

This paper analyzes and discusses the fused image which is the result of the fusion of ENVISAT ASAR and CBERS-02 CCD image data.Comparison of the three techniques of IHS transform fusion,principal components analysis fusion and wavelet transform fusion applied suggested that resolution merge of IHS transform method can get much better result,according to the visual interpretation of the resultant image.However,spatial resolution was attenuated in order to reduce the effect of speckle from the ASAR image.For the fusion image,which contains backscattering behavior from both VV polarization and HH polarization,and contains spectral information from the optical CCD data,it improves visual interpretation of the image and can be used for crop mapping with high mapping accuracy in the case discussed in this paper.