一种保持光谱特征的图像融合方法——高通滤波融合法

探讨了一种新的光谱保持型的高通滤波融合(HPFF)算法。该算法先对参与融合的全色波段图像进行高通滤波,然后用滤波后的全色波段图像替换IHS正变换后的强度分量,再进行IHS逆变换,便得到HPFF融合图像。该图像色彩与TM图像一致,优于常规IHS变换法所得的图像。

AN ARITHMETIC RS IMAGE FUSION METHOD FOR SPECTRAL PRESERVATION:HIGH PASS FILTER FUSION

The fusion methods such as IHStransform could merge two sorts of optical image data with different resolutions-a high spatial resolution panchromatic image and a low spatial resolution multispectral image. Nevertheless, such fusion methods require that the spectral response range of the high spatial resolution panchromatic image is identical or approximates to the spectral response range of the multispectral image. This paper puts forward a new fusion method called high-pass filter fusion (HPFF) that could merge two sorts of optical image data with different spectral characteristics. Its algorithm is as follows: First, to filter on the panchromatic image with high pass filter, and then to fuse the remote sensing data by applying IHStransformation. The color of the HPFFimage approximates to the color of multispectral image. The HPFFmethod is more effective in spectral preservation than the IHStransformation.