EFFECT OF DEGRADATION ON MULTISPECTRAL SATELLITE IMAGE

Abstract

Satellite images record electromagnetic radiation intensity that emitted or reflected from Earth's object within the field of view (FOV) of satellites sensor. These radiations are affected by the turbulent atmosphere and other effects (like noise and motion detectors), thus will reduce the quality of acquired images.The degree of distortion depends on wavelength, and since satellite images are taken in different wavelengths (multispectral bands) including visible and infrared (emitted and reflected). So, each band of satellite images will have different value of distortion.In this work, computer program (using matlab language) has been written to study the degradation effect parameters for each band of Landsat7 satellite image. The main objective is to show which band has less effect. It is found that band3 (0.630-0.690 ), band4 (0.750-0.900 ) and band7 (3.090-2.350 ) has great atmospheric effect for vegetation, water and sand area respectively. Archive of these areas is build up to estimated parameters used for recovery other images. Result shows that when the size of the recovered area is small best results are obtained from it.