the alı 
numb 
ground control, 
GPS camera positions, orientations } 
> tie point areas, (DEM) 
Basic: 
adjust 
Ë and d 
Feature extraction in image patches i assoc 
: Acker 
Preliminary matching in all comb. é Ë are 1C 
: keep | 
Heuristic search for multiple matches i certail 
  
  
  
  
  
  
  
  
  
  
Ë point 
Robust bundle adjustment i matcr 
iut Ë on th 
Refinement of DEM sd ; Ë key id 
block 
Creation of new tie point areas circun 
  
  
  
  
  
  
  
  
Cause 
- Image orlentatlons points 
- (adjusted tle point coordinates) = 
appee 
precis 
  
Figure 3: Kernel system of MATCH-AT Figure 4: Tie point cluster tracking bep 
the p 
The 
instar 
natur: 
eu yi A the ai 
3 7 
700 ca 
e fa ea" ^ R 
for Diu el abet Zid a 
CR e syste 
J ES e 
Howe 
triang 
3.1 In 
Thei 
integi 
of 16 
60% 
size | 
apprc 
heigh 
In or 
expos 
randc 
then 
apprc 
heigh 
coars 
chap! 
point 
homc 
reasc 
than 
undu 
those 
areas 
Thus 
syste 
syste 
syste 
gene 
Figure 6: Extracted features in image patches Figure 7: Matched tie point clusters After 
  
  
  
  
  
  
  
  
408 
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B3. Vienna 1996