Three methods are investigated for speckle reduction and enhancement of synthetic aperture radar (SAR) images in the orthogonal wavelet domain. The first method is a nonlinear method based on soft thresholding the wavelet coefficients for logarithmically transformed SAR image data. The second method uses enhanced adaptive Lee filter of the wavelet coefficients of SAR images. Finally, the third method introduces non-linear speckle reduction based on adaptive sigmoid thresholding of the wavelet coefficients for logarithmically transformed SAR images. The wavelet methods show great promise for speckle removal and hence provide better detection performance for SAR based recognition.
|Útgáfustaða||Útgefið - 1996|
|Viðburður||Proceedings of the 1996 International Geoscience and Remote Sensing Symposium, IGARSS'96. Part 1 (of 4) - Lincoln, NE, USA|
Tímalengd: 28 maí 1996 → 31 maí 1996
|Ráðstefna||Proceedings of the 1996 International Geoscience and Remote Sensing Symposium, IGARSS'96. Part 1 (of 4)|
|Borg/bær||Lincoln, NE, USA|
|Tímabil||28/05/96 → 31/05/96|