The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. Vol. XXXVII. Part BI. Beijing 2008 
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(g) (h) 
Figure 3. 8 real SAR images: (a) and (b) are ERS-2 
satellite images; (c) and (d) are airborne SAR images; (e) 
and (f) are Radarsat-1 satellite images; (g) and (h) are 
ERS-1 satellite images 
Radarsat-1 image and all denoised images have been detected 
by the Canny operator. The edge features corresponding to 
figure 4 are shown in figure 5. We find that mountain ridges in 
figure 5 (e) are continuous and easy to recognize. Especially at 
the top-right in figure 5 (e) more false edges have been 
eliminated. It will be easy to match two SAR images. 
(a) (b) 
(c) (d) 
(e) 
Figure 4. Partial experiment results of figure 3 (b): (a) 
original image; (b) image de-noised by bsf with DWT in 
(Levent S.endur et al., 2002a); (c) image de-noised by bsf 
with DT-CWT in (Levent S.endur et al., 2002a); (d) 
image de-noised by the proposed algorithm with DWT; (e) 
image de-noised by the proposed algorithm with DT-CWT 
(e) 
Figure 5. Edges feature of figure 4: (a) original image; 
(b) image de-noised by bsf with DWT in (Levent S.endur 
et al., 2002a); (c) image de-noised by bsf with DT-CWT 
in (Levent S.endur et al., 2002a); (d) image de-noised by 
the proposed algorithm with DWT; (e) image de-noised by 
the proposed algorithm with DT-CWT 
5. CONCLUSIONS