Title :
A new filter method for speckle reduction in synthetic aperture radar (SAR) images
Author :
Abdelhamid, G.H. ; Assal, H.M. ; Fahmy, M.N.
Author_Institution :
Dept. of Electron. Eng., Cairo Univ., Giza, Egypt
Abstract :
Conventional averaging of uncorrelated images of the same terrain to reduce speckle can be considered as filtering the image with a sinc-shaped filter. It is pointed out that this filter is poor in its spectral characteristics. A new filter with better characteristics, i.e., nearly flat passband and lower sidelobe-level is suggested. Examples are given to demonstrate the advantages of the new filter over the conventional one in terms of SNR (signal-to-noise ratio) improvement and spectral characteristics.<>
Keywords :
filtering and prediction theory; picture processing; radar theory; speckle; SAR images; SNR; filter method; flat passband; image filtering; sidelobe-level; signal-to-noise ratio; sinc-shaped filter; speckle reduction; spectral characteristics; synthetic aperture radar; uncorrelated images; Filters; Interference; Laser noise; Laser radar; Passband; Pixel; Radar imaging; Radar scattering; Speckle; Synthetic aperture radar;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1991. AP-S. Digest
Conference_Location :
London, Ontario, Canada
Print_ISBN :
0-7803-0144-7
DOI :
10.1109/APS.1991.175022
