TY - GEN
T1 - DFT/RDFT filter bank approach for speckle reduction in SAR images
AU - Sezgin, M.
AU - Erer, I.
AU - Ersoy, O. K.
PY - 2005
Y1 - 2005
N2 - A new speckle reduction algorithm based on subband decomposition is presented. The subband decomposition is performed using a DFT/RDFT-based symmetric, zero-phase, nonoverlapping digital filter bank. The SAR image is decomposed using the proposed filter bank structure and a threshold value is estimated according to noise variance in each subband, and used for soft thresholding. The despeckled image is obtained from the thresholded subband coefficients by a new perfect reconstruction algorithm. Experimental results show that the proposed method has competitive noise removal and detail preservation properties as compared to conventional approaches such as median filtering and wavelet transform based methods.
AB - A new speckle reduction algorithm based on subband decomposition is presented. The subband decomposition is performed using a DFT/RDFT-based symmetric, zero-phase, nonoverlapping digital filter bank. The SAR image is decomposed using the proposed filter bank structure and a threshold value is estimated according to noise variance in each subband, and used for soft thresholding. The despeckled image is obtained from the thresholded subband coefficients by a new perfect reconstruction algorithm. Experimental results show that the proposed method has competitive noise removal and detail preservation properties as compared to conventional approaches such as median filtering and wavelet transform based methods.
UR - https://www.scopus.com/pages/publications/33745726390
U2 - 10.1109/IGARSS.2005.1526650
DO - 10.1109/IGARSS.2005.1526650
M3 - Conference contribution
AN - SCOPUS:33745726390
SN - 0780390504
SN - 9780780390508
T3 - International Geoscience and Remote Sensing Symposium (IGARSS)
SP - 3689
EP - 3692
BT - 25th Anniversary IGARSS 2005
T2 - 2005 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2005
Y2 - 25 July 2005 through 29 July 2005
ER -