International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B5. Istanbul 2004 
  
  
  
OEL i J (i8 Erreur lettere detti PER 
0 
20 40 60 80 100 0 10 20 30 40 
08 pyM——— MM M ——P ARMUT 0 Brenn ET 
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(d) 
(c) 
Figure 5. (a), (b), (c), (d) Correlation between slope variation and gray shade variation | 
for synthetic image