Pan-sharpening using induction

Pan-sharpening is the process of improving spatial resolution of multi-spectral (MS) satellite images using the spatial details of a high resolution Panchromatic (PAN) image. Pan sharpening can be divided into scaling and fusion processes. In the first part of this paper we use Induction instead of bicubic interpolation for up-scaling the MS images. SFIM (Smoothing Filter based Intensity Modulation) is used to obtain fused MS images for the two different scaling techniques. In the second part, “Indusion”, a new fusion technique, derived from Induction, is proposed. In this technique the high frequency content of the PAN image is extracted using a pair of up-scaling and down scaling filters. It is then added to the up-scaled MS images. Finally a comparison of Indusion with Intensity, Hue, Saturation (HIS), Discrete Wavelet Transform (DWT) and SFIM fusion techniques is presented for IKONOS satellite images.