Satellite imaging system produces multisensory images. The sensors which are responsible for Red, Green, and Blue produce multispectral images and the pan sensor which produce grayscale image known as panchromatic images. To obtain true color image with high spatial and spectral resolution pan sharpening techniques are employed. Image fusion algorithms such as Hue Saturation Intensity method, Principal Component Analysis, Brovey Transform and Synthetic Variable Ratio are applied for

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... process. Though these techniques have high spatial resolution there is a problem of spectral distortion. To overcome this problem Discrete Wavelet Transform (DWT) based image fusion technique is proposed. This method extracts both spectral and spatial information from MS and PAN satellites images.