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 (IHS), discrete wavelet transform (DWT) and SFIM fusion techniques is presented for IKONOS satellite images.