从融合视角优化设计星载高分光学相机全色波段展宽

Design of Width of Panchromatic Spectra of High Resolution Optical Remote Sensing Camera Based on Pansharpening

高分辨率星载光学遥感载荷全色波段与多光谱波段范围的差异是造成融合图像光谱畸变的主要原因。文章从当前在轨的主要高分辨率光学遥感卫星全色波段设置出发,选择具有代表性的SPOT-5、IKONOS、GeoEye-1、ZY-3、Pleiades-1A、SPOT-6卫星图像,使用相关系数和相对整体维数综合误差两个指标评价标准HIS（色度-亮度-饱和度）和Brovey融合图像的光谱失真大小,从融合图像光谱保真视角分析了最小光谱畸变的全色波段展宽为450~800nm,无需复杂的融合算法即能生产光谱高保真的自然彩色和伪彩色高分辨率融合图像。

The spectral distortion existing in the high resolution optical pansharpen image is mainly caused by the different width of panchromatic spectra from multispectral band of remote sensing camera. The paper firstly introduces the relative spectral response of multispectral and panchromatic band of some typical high resolution optical remote sensing satellites on-orbit. Then SPOT-5, IKONOS, GeoEye-1, ZY-3, Pleiades-lA and SPOT-6 images are selected to pansharpen experiment. The optimum width of panchromatic band 450-800nm is discussed in detail according to the minimum spectral distortion relative to the original multispectral image. The high spectral fidelity of pansharpen image can be produced by using the standard HIS and Brovey pansharpen algorithms with 450-800nm panchromatic image.