集成樱帽变换的快速IHS融合改进方法

Improved method of fast IHS fusion with Tasseled Cap transformation

本文从IKONOS高分辨率光学传感器的光谱特性出发,分析了植被对快速亮度-色调-饱和度(IHS)融合方法的影响,针对性地提出了一种集成缨帽变换自动分离植被的快速IHS融合改进方法。该方法利用樱帽变换分量构造植被指数实现IKONOS影像的植被区域自动分离,进而应用高通滤波(HP)融合对植被进行单独处理,以降低植被引起快速IHS融合结果光谱变形的影响,提高快速IHS融合质量。

By analyzing spectral characteristics of IKONOS multi-spectral and panchromatic sensor, the influence of vegetation pixels on fast Intensity Hue Saturation （IHS） fusion method was discussed, and an improved method using automatic separation of veg- etation based on Tasseled Cap transformation was proposed. Firstly, a vegetation index constructed by Tasseled Cap transformation com- ponents was used to separate vegetation with a fixed threshold. Then, in order to reduce the spectra] distortion that vegetation does on fast IHS fusion results, High Pass （HP） fusian method was adopted to fuse vegetation individually. The result was proved to be able to improve the fusion effect of fast HIS.