Fig.4 Areas of change (white regions) obtained by the Fig.6. Areas of change (white regions) obtained by the 
detection algorithm using the threshold value of D detection algorithm using the 2-dim. histogram 
Change Area 
  
    
  
  
  
ru 
0 Non-Change Area 
Frequencies 
Thresholc 
  
  
  
  
  
  
  
EX — à — 
e 
e 
Ed 
CESR RES 
  
Fig.5 2-dimensional frequency distribution in bands 3 and 7 
  
Fig.7 Shape ofthe pixel areas detected from two methods, 
(a) the method using the threshold value of D and 
(b) the method using the 2-dim. histogram . 
1) newly developed residential area, 
2) newly constructed factory, 3) newly extended road 
388 
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B7. Vienna 1996 
KE 
AB 
usi 
diff 
Wic 
inf 
me 
NIF 
refi 
res 
spr 
ste 
lea 
refl 
diff 
elii 
pla 
dey 
infc 
lea