Liang-Chien Chen 
  
Fig.7. Test Images (a) Left (b) Right 
  
  
  
  
  
  
  
  
  
Fig.9. Selected Building Blocks 
  
  
  
T - 
» % 
^s 
= m. BA 
e t y 
e 
By - 
m 4 
3 iE 
g \ E 
eÉ ‘4 
; Eee | 
5 ua v = i 
jT 5 s 
T wo! je 
RA e 4 J du i LU ; x 
we L ; = * $ X 
in * * S 
= = Sae d out 
  
  
  
Fig.10. Calculated Edge Strength Map 
174 International Archives of Photogrammetry and Remote Sensing. Vol. XXXIII, Part B3. Amsterdam 2000.